Voices for Reason Blog | The Ayn Rand Institute

POST by The Editors| View all Posts December 08, 2016

Why does Ayn Rand think that selfishness is a virtue?

Donald Trumps election has spotlighted an important issue: cronyism and the rigged system that has special interests in bed with government, getting bailouts and other favors.

Today The Hill published a new column by ARIs Steve Simpson, in which he argues that while President-Elect Donald Trumps hostility towards freedom of speech is worrisome, hes also by far not alone in this regard. [I]s Trumps urge to censor this form of speech really different from Hillary Clintons desire to ban the political speech at issue in Citizens United?

Carol Gould, the author and commentator, has praised Failing to Confront Islamic Totalitarianism for reaching the highest level of scholarly excellence. The book, she continued, should be a primer for leaders around the globe and a text to be read by students hoping to go out into the working world in leadership positions. Highly recommended.

Yaron Brooks first visit in Georgia was an inspiring experience.

You still have time to enter ARIs College Writing Contest for a chance to win up to $1,000.

Whats wrong with mainstream economics? Has it placed mathematical gymnastics above a genuine understanding of how a division of labor economy encourages specialization, innovation and economic progress?

In a column for Financial Advisor, investment guru Nick Murray names Equal Is Unfair a runner-up for best book of 2016.

Those who help support ARI monthly via debit/credit card or electronic funds transfer are among our most highly valued contributors. We call such contributors Sustainers because their continuing commitment helps ensure the continuance of our vital programs. Contributing in this way is convenient for them and helps to provide steady funding for our vital programs.

In recent years, Yaron Brook, ARI chairman executive, has been invited to give talks at Exeter University in the UK. In 2014, Brook gave his first Exeter talk on the morality of capitalism. The talk, which was organized with the help of a former ARI intern, was delivered to a lecture room filled to capacity. In 2015, Brook came back to talk about the inequality debate. Again, it was a packed room with more than 150 students attending live, and with over 30,000 views it is one of the most watched videos with Brook.

More:

Voices for Reason Blog | The Ayn Rand Institute

Oceania Travel Guide – Wikitravel

Oceania

Oceania is a vast, arbitrarily defined expanse of the world where the Pacific Ocean rather than land borders connects the nations. It is home to glistening white beaches, coconut palms swaying in the breeze, beautiful coral reefs, and rugged volcanic islands rising out of the blue ocean. Its diverse nations have both some of the world's most cosmopolitan and internationalised cities such as Melbourne, and some of its most remote and culturally isolated villages.

Australia, New Zealand and Papua New Guinea are by far the largest countries on these lands that comprise southern Oceania, with the first two the most visited. Within Oceania are the vast island nation groupings of Polynesia to the far east, Melanesia to the west and Micronesia to the north.

Australia and New Zealand are both former British colonies. At one time it was envisaged that the two colonies would become a single country. In the past, Papua New Guinea was a United Nations trusteeship, administered by Australia. Various islands have been annexed by Britain, Spain, Portugal, Germany, France, Australia and the United States.

The presence of all of these cultures has created an influence on aspects of culture norms and development. In many areas at least one, often more indigenous languages, and the languages of one or more of the colonial powers, are spoken by the majority as people have coexisted or joined with the influx of other cultures. This mix has influenced cuisine, architecture and other facets of culture.

Ecologically, Oceania also includes the eastern parts of Indonesia as far as Lombok and Sulawesi.

See the country articles for detailed information on how to Get in.

The major countries of Australia and New Zealand do of course offer connections from all continents, although there are few direct flights from South America. There are some other gateways offering other opportunities to get in to Oceania, and for interesting itineraries. Air France connects New Caledonia direct with Tokyo and Paris and also flies to Tahiti. Onward connections to Sydney and Auckland are possible. Fiji Airways connects Fiji with Los Angeles with connections through to Sydney, Auckland and Tahiti. Tahiti is connected to Los Angeles, and you can fly to the Cook Islands direct from there. Air New Zealand provides a service to Tonga and Samoa from Los Angeles and Auckland. The Los Angeles service is subsidized by the New Zealand government as a form of aid to the two countries. Manila, Guam and Honolulu offer a gateway to the many countries of Micronesia, mainly on Continental Airlines.

The smallest islands with less tourism present travel challenges. Many are entirely deserted, and some have restrictions on access. Others require specialized services you may hire.

A South Pacific cruise.

Without a yacht, or a lot of time, the only way for travellers to get around between the main destinations of Oceania is by plane. Sydney, Brisbane, Auckland, and Los Angeles have good connectivity to the region. It is usually possible to fly from the west coast of the United States through to Sydney or Auckland via Hawaii, Tahiti, Fiji or even the Cook Islands.

However, air routes tend to come and go depending on whether the airlines find them profitable or not. Much of Micronesia, having been under US Administration, is serviced by Continental Airlines. Much of English-speaking Polynesia receives regular flights from Air New Zealand. Melanesia is mainly serviced by national and Australian airlines. Don't expect daily flights. Patience is required.

Flying between Micronesia and the other two areas is problematic and may involve flying all the way to Honolulu or a complicated route through Manila, Sydney and Auckland. Continental Airlines has a weekly flight from Guam to Nadi in Fiji. United Airlines offers flights also.

Some flight options within Oceania, amongst others, are:

There are some options for boats, cruise ships, private yachts, adventure cruises, and even cargo ships.

Consult the guide for the destination you are visiting.

All island groups are fascinating and with time and money you can spend months just travelling around. There are some stunningly beautiful islands (Samoa, Cook Islands, French Polynesia), some fascinating cultures and festivals, some wonderful diving and totally deserted beaches. Check the individual country sections for details.

Skiing and snow sports. New Zealand has reliable winter snowfalls, mostly on the South Island in winter. The Snowy Mountains in New South Wales have the largest ski resorts in the southern hemisphere.

Although staple foods from outside the region, such as rice and flour, now have a firm foothold, the traditional staples of roots and tubers remain very important. The cheapest is usually cassava, which can be left in the ground for a long time. Sweet potato is a very important crop and is found in most parts of Oceania with the major producing area being the Highlands of Papua New Guinea. Taro and yam are also widespread. The latter is the most valuable of the roots and tubers and there are many customs associated with its cultivation. In the Sepik area of Papua New Guinea, for example, relations between married couples are traditionally forbidden while the yams are growing. On the other hand, in the Trobriand Islands the yam harvest traditionally is a period of active relations within couples, and of sexual freedom in general.

Kava is a drink produced from the roots of a plant related to the pepper plant and found mainly in Polynesia as well as Fiji and Vanuatu. It has a mildly narcotic effect. Other names include 'awa (Hawai'i), 'ava (Samoa), yaqona (Fiji), and sakau (Pohnpei). Traditionally it is prepared by chewing, grinding or pounding the roots of the kava plant. In Tonga, chewing traditionally had to be done by female virgins. Pounding is done in a large stone with a small log. The product is then added to cold water and consumed as quickly as possible, invariably as part of a group of people sitting around and sharing the cup. Check before taking any out of the country, however, as importing or exporting kava can be illegal for travelers.

Usual travel precautions re: any socializing or involvement with local people apply, always, and take special care in remote areas and on remote islands. Prepare thoroughly for trips into remote areas. Do your research, be prepared, understand that wilderness areas are true wilderness.

Fiji, New Caledonia, the Cook Islands, Samoa and all other islands except those listed next are usually malaria free.

Vanuatu has no reported cases of malaria currently although it has existed. Islanders are recuperating from flood losses (2014), and attendant human and infrastructure damage in the Solomon Islands, with some people who have contracted malaria. The malaria risk has lessened in Papua New Guinea this decade. All mentioned have a regimen of larval control practices.

Check with the WHO for the latest statistics.

Excerpt from:

Oceania Travel Guide - Wikitravel

Cheap Caribbean

Breathless Punta Cana Resort & Spa

Looking for a Vegas style party? With nightly entertainment and themed parties, Breathless Punta Cana Resort & Spa an adults-only playground for elite, discerning travelers.

Travel Dates 4/17 - 8/19 - 3 Days Left!

Prices are per person based on double occupancy. Limited availability based on departure city and travel dates.

Travel Dates 1/2 - 2/18 - 5 Days Left!

Prices are per person based on double occupancy. Limited availability based on departure city and travel dates.

Travel Dates 1/2 - 2/12 - 3 Days Left!

Prices are per person based on double occupancy. Limited availability based on departure city and travel dates.

Travel Dates 4/17 - 6/30 - 2 Days Left!

Prices are per person based on double occupancy. Limited availability based on departure city and travel dates.

Travel Dates 1/3 - 1/22 - 3 Days Left!

Prices are per person based on double occupancy. Limited availability based on departure city and travel dates.

Travel Dates 4/17 - 8/31 - 6 Days Left!

Prices are per person based on double occupancy. Limited availability based on departure city and travel dates.

Foodie Favorites

Our guide to the many resort meal-plans and which is best for you.

Eco Friendly

Find out how to properly experience the ecological wonderland that is Cozumel

Top Rated

Having trouble narrowing down your options? Here are our picks for the top 10 beaches in the Caribbean.

By destination Antigua Aruba BVI Outer Islands BVI Tortola BVI Virgin Gorda Bahamas - Abaco - via Marsh Harbour Airport (MHH) Bahamas - Abaco - via Treasure Cay Airport (TCB) Bahamas - Grand Bahama Island Bahamas - Nassau Bahamas - Nassau and Paradise Island Bahamas - Paradise Island Barbados Belize Bermuda Cayman Islands Costa Rica-Guanacaste Beach Region Costa Rica-Puntarenas/Jaco/Manuel Antonio Areas Costa Rica-San Jose City Costa Rica-Tambor/Mal Pais Curacao Dominican Republic - La Romana Dominican Republic - Puerto Plata Dominican Republic - Punta Cana Dominican Republic - Samana Dominican Republic - Samana via Samana Airport Dominican Republic - Santo Domingo Grenada Haiti Jamaica Mexico - Cancun Mexico - Cancun and Riviera Maya Mexico - Cozumel Mexico - Huatulco Mexico - Ixtapa/Zihuatanejo Mexico - Los Cabos Mexico - Manzanillo Mexico - Mazatlan Mexico - Puerto Vallarta Mexico - Puerto Vallarta and Riviera Nayarit Mexico - Riviera Maya Mexico - Riviera Nayarit Nevis Nicaragua Panama Puerto Rico St. Kitts St. Lucia St. Maarten/St. Martin Turks & Caicos USVI St. Croix USVI St. Thomas

By resort chain Bahia Principe Resorts Barcelo Resorts Blue Diamond Hotels Resorts BlueBay Resorts Breathless Resorts Catalonia Resorts Comfort Suites Resorts Couples Resorts Divi Resorts Dreams Resorts & Spas Elite Island Resorts Fairmont Resorts Hard Rock Hotels Resorts Hilton Resorts Holiday Inn Resorts Hyatt Resorts Iberostar Resorts Jewel Resorts Karisma Resorts Majestic Resorts Marriott Resorts Melia Hotels Resorts Now Resorts Oasis Resorts Occidental Hotels & Resorts Ocean Hotels Resorts Palace Resorts Palladium Resorts Princess Resorts Pueblo Bonito Resorts Riu Resorts Sandos Resorts Secrets Resorts & Spas Sheraton Resorts Solaris Resorts Sonesta Resorts Sunscape Resorts Sunset Group Resorts The Villa Group Resorts Velas Resorts Viva Wyndham Resorts Zoetry Wellness & Spa Resorts

By resort Alamanda Resort Alexandra Resort Allegro Cozumel Allegro Playacar Almond Beach Resort Alsol del Mar Cap Cana Alsol Luxury Village Cap Cana Alsol Tiara Cap Cana Amsterdam Manor Beach Resort Antilles Sapphire Beach Resort and Marina Arenal Lodge Aruba Marriott Resort & Stellaris Casino Avila Hotel Azul Beach a Gourmet Inclusive Resort, by Karisma Azul Sensatori Mexico a Gourmet Inclusive Resort, by Karisma Barcelo Aruba Barcelo Bavaro Beach (Adults-Only) Barcelo Bavaro Palace Deluxe Barcelo Bavaro Palace Deluxe Club Family Barcelo Bavaro Palace Deluxe Club Premium Barcelo Costa Cancun Barcelo Gran Faro Los Cabos Barcelo Huatulco Barcelo Ixtapa Barcelo Karmina Barcelo Langosta Beach Barcelo Maya Caribe and Beach Barcelo Maya Colonial and Tropical Beach Barcelo Maya Palace Barcelo Montelimar Barcelo Puerto Vallarta Barcelo Punta Cana Resort Barcelo San Jose Barcelo Tambor Barcelo Tucancun Beach Bavaro Princess All Suites Resort, Spa & Casino Bay View Suites, Paradise Island, Bahamas Be Live Collection Canoa Be Live Collection Marien Be Live Collection Punta Cana Beach Palace Belizean Shores Resort BelleVue Dominican Bay Blue Diamond Luxury Boutique Hotel Blue Waters Antigua BlueBay Grand Esmeralda BlueBay Villas Doradas BodyHoliday Bolongo Bay Beach Resort Bolongo Bay Beach Resort All Inclusive Bougainvillea Beach Resort Bougainvillea Beach Resort - All Inclusive Breathless Cabo San Lucas Resort and Spa Breathless Montego Bay Resort & Spa Breathless Punta Cana Resort & Spa Breathless Riviera Cancun Resort & Spa Breezes Bahamas Brickell Bay Beach Club British Colonial Hilton Nassau Buccaneer Bucuti & Tara Beach Resort Cala Luna Boutique Hotel & Villas Canto Del Sol Plaza Vallarta Caribe Club Princess Beach Resort & Spa Caribe Hilton San Juan Casa Velas Puerto Vallarta Catalonia Gran Dominicus Catalonia Privileged Maroma Catalonia Punta Cana Catalonia Riviera Maya Catalonia Royal Bavaro (Adults-Only) Catalonia Royal Tulum Coco Beach Resort, Belize Coco Reef Bermuda CocoLaPalm Seaside Resort, Negril Coconut Bay Beach Resort and Spa Coconut Court Beach Hotel Cofresi Palm Beach & Spa Resort Colony Club Hotel Comfort Suites and Resort Grand Cayman Comfort Suites Paradise Island Condado Plaza Hilton Coral Costa Caribe Resort Coral Gardens on Grace Bay Costa Rica Marriott Couples Negril Couples Sans Souci Couples Swept Away Couples Tower Isle Courtyard by Marriott San Jose, Costa Rica Coyaba Beach Resort Cozumel Palace Crane Resort and Residences Crown Paradise Club Cancun Crown Paradise Club Puerto Vallarta Crowne Plaza Panama Crystal Cove Hotel All Inclusive Deal of Fortune - 5 Sun Jammin' in Jamaica (Lively Adults-Only) Deal of Fortune - 5 Sun Rockin' in Riviera Cancun (Lively Adults Only) Deal of Fortune Antigua All Inclusive Deal of Fortune Cancun Deal of Fortune Cancun (Adults-Only) Deal of Fortune Costa Rica Deal of Fortune Curacao All Inclusive Deal of Fortune Los Cabos (Adults-Only) Deal of Fortune Mayan Riviera Deal of Fortune Mayan Riviera (Adults-Only) Deal of Fortune Mayan Riviera Adults Only Ocean View Deal of Fortune Montego Bay Deal of Fortune Montego Bay (Adults-Only) Deal of Fortune Paradisus Playa del Carmen Deal of Fortune Puerto Plata Deal of Fortune Puerto Rico Deal of Fortune Punta Cana (Adults-Only) - 4 1/2 Sun Deal of Fortune Punta Cana (Adults-Only) - 5 Sun Deal of Fortune Punta Cana (Family Friendly) - 4 1/2 Sun Deal of Fortune Punta Cana-(Family Friendly) - 4 Sun Desire Riviera Maya Pearl Resort Desire Riviera Maya Resort Divi Aruba All-Inclusive Divi Aruba Phoenix Beach Resort Divi Carina Bay All Inclusive Resort & Casino Divi Dutch Village All Inclusive Beach Resort Divi Dutch Village Beach Resort Divi Flamingo Beach Resort & Casino All Inclusive Divi Little Bay Beach Resort Divi Southwinds Beach Resort Divi Village All Inclusive Villas Divi Village Golf & Beach Resort Dover Beach Hotel Dreams Delight Playa Bonita Panama Dreams Dominicus La Romana Dreams Huatulco Resort & Spa Dreams La Romana Resort & Spa Dreams Las Mareas Costa Rica Dreams Los Cabos Suites Golf Resort & Spa Dreams Palm Beach Punta Cana Dreams Playa Mujeres Golf & Spa Resort Dreams Puerto Aventuras Resort & Spa Dreams Punta Cana Resort & Spa Dreams Riviera Cancun Resort & Spa Dreams Sands Cancun Resort & Spa Dreams Tulum Resort & Spa Dreams Villamagna Nuevo Vallarta El Cid Castilla Beach El Cid El Moro Beach El Cid El Moro Beach All Inclusive El Cid La Ceiba Beach El Cid Marina Beach El Conquistador, A Waldorf Astoria Resort El Cozumeleno Beach Resort El Dorado Casitas Royale El Dorado Royale a Gourmet Inclusive Resort, by Karisma El Dorado Seaside Suites a Gourmet Inclusive Resort, by Karisma El San Juan Resort & Casino Emerald Beach Resort Emotions Beach Resort Esmeralda Resort Fairmont Southampton Family Club at Grand Riviera Princess Flamboyant - Le Village Flamingo Bay Hotel and Marina Flamingo Beach Resort & Spa - Costa Rica Flamingo Beach Resort & Spa All Inclusive - Costa Rica Floris Suite Hotel (Adults-Only) Galley Bay Resort & Spa Gamboa Rainforest Resort Garza Blanca Preserve Resort & Spa Garza Blanca Preserve Resort & Spa All Inclusive Generations Riviera Maya, by Karisma Golden Crown Paradise Resort Puerto Vallarta GR Caribe by Solaris GR Solaris Cancun Grace Bay Club Gran Melia Golf Resort Puerto Rico Grand Bahia Principe Bavaro Grand Bahia Principe Cayacoa (SDQ) Grand Bahia Principe Coba Grand Bahia Principe El Portillo (SDQ) Grand Bahia Principe Jamaica Grand Bahia Principe La Romana Grand Bahia Principe Punta Cana Grand Bahia Principe San Juan Grand Bahia Principe Tulum Grand Bahia Principe Turquesa Grand Case Beach Club Grand Cayman Marriott Beach Resort Grand Lucayan Resort Grand Oasis Cancun Grand Oasis Palm Grand Oasis Sens Grand Oasis Tulum Grand Palladium Bavaro Suites Resort & Spa Grand Palladium Colonial Resort & Spa Grand Palladium Jamaica Resort & Spa Grand Palladium Kantenah Resort & Spa Grand Palladium Lady Hamilton Resort & Spa Grand Palladium Palace Resort & Spa Grand Palladium Punta Cana Resort & Spa Grand Palladium Riviera Resort & Spa Grand Palladium Vallarta Resort & Spa Grand Palladium White Sand Resort & Spa Grand Riviera Princess All Suites Resort & Spa Grand Velas Riviera Maya Grand Velas Riviera Nayarit Graycliff Hotel Grotto Bay Beach Resort Grotto Bay Beach Resort All Inclusive Hamilton Princess & Beach Club, A Fairmont Managed Hotel Hard Rock Hotel & Casino Punta Cana Hard Rock Hotel Cancun Hard Rock Hotel Riviera Maya Hard Rock Hotel Riviera Maya - Heaven Section Hard Rock Hotel Vallarta Hawksbill by Rex Resorts, Antigua Hedonism II Henry Morgan Hotel & Beach Resort Hideaway at Royalton Negril Hideaway at Royalton Riviera Cancun Hideaway at Royalton St. Lucia Hilton Aruba Caribbean Resort and Casino Hilton Barbados Hilton Curacao Hilton Puerto Vallarta Resort Hilton Rose Hall Resort & Spa Holiday Inn at the Panama Canal Holiday Inn Resort Aruba - Beach Resort & Casino Holiday Inn Resort Aruba - Beach Resort & Casino All Inclusive Holiday Inn Resort Grand Cayman Holiday Inn Resort Ixtapa All Inclusive Holiday Inn Resort Los Cabos Holiday Inn Resort, Montego Bay, Jamaica - All Inclusive Holiday Inn San Jose Hopkins Bay Belize Hotel Cozumel & Resort Hotel La Plantation Hotel Magic Blue Playa del Carmen Hotel Marina El Cid Spa & Beach Resort Hyatt Regency Aruba Resort & Casino Iberostar Bavaro Iberostar Cancun Iberostar Costa Dorada Iberostar Cozumel Iberostar Dominicana Iberostar Grand Hotel Bavaro Iberostar Grand Hotel Paraiso Iberostar Grand Hotel Rose Hall Iberostar Hacienda Dominicus Iberostar Paraiso Beach Resort Iberostar Paraiso Del Mar Iberostar Paraiso Lindo Resort Iberostar Paraiso Maya Iberostar Playa Mita Iberostar Punta Cana Iberostar Quetzal Iberostar Rose Hall Beach Iberostar Rose Hall Suites Iberostar Tucan InterContinental Miramar Panama InterContinental Presidente Cozumel InterContinental San Juan Isla Mujeres Palace Island Inn Hotel Jewel Dunn's River Beach Resort & Spa Jewel Paradise Cove Resort & Spa, All Inclusive, Curio Collection by Hilton Jewel Runaway Bay Beach & Golf Resort Jolly Beach Resort and Spa All Inclusive JW Marriott Guanacaste Resort & Spa Karibe Hotel Kontiki Beach Resort Curacao Krystal Cancun Krystal Ixtapa Krystal Vallarta Kura Hulanda Lodge & Beach Club La Concha, A Renaissance Resort La Playa - Orient Bay Las Brisas Ixtapa Lazy Parrot Le Blanc Spa Resort Legends Beach Resort Legends Beach Resort All Inclusive Lifestyle Tropical Beach Resort & Spa Lighthouse Pointe at Grand Lucayan All Inclusive Long Bay Beach Club Los Suenos Marriott Ocean & Golf Resort Luxury Bahia Principe Akumal, Don Pablo Collection Luxury Bahia Principe Ambar Blue Don Pablo Collection Luxury Bahia Principe Ambar Green Don Pablo Collection Luxury Bahia Principe Bouganville Don Pablo Collection Luxury Bahia Principe Cayo Levantado Don Pablo Collection (SDQ) Luxury Bahia Principe Esmeralda Don Pablo Collection Luxury Bahia Principe Fantasia Don Pablo Collection Luxury Bahia Principe Runaway Bay Don Pablo Collection Luxury Bahia Principe Samana Luxury Bahia Principe Sian Ka'an Majestic Colonial Punta Cana Majestic Elegance Punta Cana Majestic Mirage Manchebo Beach Resort & Spa Manchebo Beach Resort & Spa All Inclusive Mango Bay Hotel All Inclusive Marival Residences & World Spa Marival Resort & Suites Nuevo Vallarta Marriott CasaMagna Puerto Vallarta Resort & Spa Marriott CasaMagna Puerto Vallarta Resort & Spa All Inclusive Marriott Frenchman's Reef & Morning Star Beach Resort Marriott Frenchman's Reef & Morning Star Beach Resort All-Inclusive Marriott Port-Au-Prince ME Cabo by Melia Media Luna Resort & Spa Melia Braco Village Melia Caribe Tropical Melia Cozumel Golf - All Inclusive Melia Nassau Beach Resort All Inclusive Melia Puerto Vallarta All Inclusive Memories Grand Bahama Beach & Casino Resort Memories Splash Punta Cana Mill Resort & Suites Moon Palace Cancun Moon Palace Jamaica Grande Moulin Sur Mer Beach Resort Natura Park Beach Eco Resort & Spa Newstead Belmont Hills Nickelodeon Hotels & Resorts Punta Cana Now Amber Puerto Vallarta Now Garden Punta Cana Now Jade Riviera Cancun Now Larimar Punta Cana Now Onyx Punta Cana Now Sapphire Riviera Cancun Oasis Cancun Lite Oasis Palm Oasis Tulum Lite Occidental at Xcaret Destination Occidental Caribe Occidental Costa Cancun Occidental Cozumel Occidental Grand Aruba - All Inclusive Resort Occidental Nuevo Vallarta Occidental Papagayo Occidental Punta Cana Occidental Tamarindo Occidental Tucancun Ocean Blue & Sand Beach Resort Ocean Club Ocean Club West Ocean Coral & Turquesa Ocean Maya Royale Ocean Riviera Paradise Ocean Terrace Inn Ocean Two Ottley's Plantation Inn Oualie Beach Resort Oyster Bay Beach Resort Palm Court Hotel Palms at Pelican Cove Panama Marriott Hotel Paradisus Cancun Paradisus Los Cabos Paradisus Palma Real Paradisus Playa del Carmen, La Esmeralda Paradisus Playa del Carmen, La Perla Paradisus Punta Cana Pelican Bay at Lucaya Pineapple Beach Club, Antigua Platinum Yucatan Princess (Adults-Only) Playacar Palace Ports of Call Resort - Turks & Caicos Presidential Suites Cofresi by Lifestyle Presidential Suites Punta Cana Princess Heights Pueblo Bonito Emerald Bay Resort & Spa Pueblo Bonito Pacifica Resort & Spa Pueblo Bonito Rose Resort & Spa Pueblo Bonito Sunset Beach, All Suites Resort & Spa Punta Cana Princess All Suites Resort & Spa Radisson Aquatica Resort Barbados Renaissance Aruba Resort & Casino Renaissance Aruba Resort & Casino All Inclusive Renaissance Curacao Resort and Casino Renaissance Curacao Resort and Casino All Inclusive Renaissance St. Croix Carambola Beach Resort & Spa Rendezvous St. Lucia Rincon Beach Resort Riu Bachata Riu Bambu Riu Cancun Riu Caribe Riu Emerald Bay Riu Guanacaste Riu Jalisco Riu Lupita Riu Merengue Riu Montego Bay Riu Naiboa Riu Negril Riu Ocho Rios Riu Palace Antillas (Adults-Only) Riu Palace Aruba Riu Palace Bavaro Riu Palace Cabo San Lucas Riu Palace Costa Rica Riu Palace Jamaica (Adults-Only) Riu Palace Las Americas (Adults-Only) Riu Palace Macao (Adults-Only) Riu Palace Mexico Riu Palace Pacifico Riu Palace Paradise Island Riu Palace Peninsula Riu Palace Punta Cana Riu Palace Riviera Maya Riu Palace St. Martin Riu Palace Tropical Bay Riu Playa Blanca Riu Playacar Riu Reggae (Adults-Only) Riu Republica (Adults-Only) Riu Santa Fe Riu Vallarta Riu Yucatan Robert's Grove Beach Resort Rooms on the Beach, Ocho Rios Royal Decameron Club Caribbean Royal Decameron Cornwall Beach Royal Decameron Indigo Beach Royal Decameron Los Cabos Royal Decameron Montego Beach Royal Hideaway Playacar All Inclusive Adults Only Resort Royal Solaris Cancun Royal Solaris Los Cabos Resort and Spa Royal Suites Turquesa by Palladium (Adults-Only) Royal West Indies Resort Royalton Blue Waters Royalton Negril Royalton Punta Cana Resort & Casino Royalton Riviera Cancun Royalton St. Lucia Royalton White Sands Samsara Cliff Resort Samsara Cliff Resort All Inclusive San Juan Marriott and Stellaris Casino San Juan Water & Beach Club Hotel Sanctuary Cap Cana (Adults-Only) Sandos Cancun Luxury Resort Sandos Caracol Eco Resort Sandos Finisterra Los Cabos Sandos Playacar Beach Resort Sands At Grace Bay Santa Barbara Beach & Golf Resort Savannah Beach Hotel All Inclusive Sea Breeze Beach Hotel Secrets Akumal Riviera Maya Secrets Aura Cozumel Secrets Cap Cana Resort & Spa Secrets Capri Riviera Cancun Secrets Huatulco Resort & Spa Secrets Maroma Beach Riviera Cancun Secrets Papagayo Resort & Spa Secrets Playa Mujeres Golf & Spa Resort Secrets Puerto Los Cabos Golf & Spa Resort Secrets Royal Beach Punta Cana Secrets Silversands Riviera Cancun Secrets St. James Montego Bay Secrets The Vine Cancun Secrets Vallarta Bay Puerto Vallarta Secrets Wild Orchid Montego Bay Seven Stars Resort Sheraton Old San Juan Hotel Sheraton Puerto Rico Hotel Sibonne Beach Hotel Silver Point Hotel Sirenis Punta Cana Resort Casino & Aquagames Sivory Punta Cana Somerset on Grace Bay Sonesta Great Bay Beach Resort, Casino & Spa (Adults-Only) Sonesta Kura Hulanda Village & Spa Sonesta Maho Beach Resort & Casino Sonesta Ocean Point (Adults-Only) South Gap Hotel Spice Island Beach Resort St. James's Club & Villas St. James's Club Morgan Bay, Saint Lucia St. Kitts Marriott Resort & The Royal Beach Casino St. Kitts Marriott Resort & The Royal Beach Casino Experience Inclusive St. Lucian by Rex Resorts, St. Lucia St. Regis Bahia Beach Resort Sugar Bay Barbados Sugar Bay Club Sugar Bay Resort & Spa Sugar Bay Resort & Spa All Inclusive Sugar Beach, A Viceroy Resort Sun Palace SunBreeze Hotel SunBreeze Suites Sunscape Bavaro Beach Punta Cana Sunscape Cove Montego Bay Sunscape Curacao Resort, Spa & Casino Sunscape Dominican Beach Punta Cana Sunscape Dorado Pacifico Ixtapa Sunscape Puerto Plata Sunscape Puerto Plata (STI) Sunscape Puerto Vallarta Resort Sunscape Sabor Cozumel Sunscape Splash Montego Bay Sunset at the Palms Resort & Spa Sunshine Suites Resort Grand Cayman Tamarijn Aruba All Inclusive Tamarind Hotel Temptation Resort & Spa, Cancun Tesoro Los Cabos The Club, Barbados The Grand at Moon Palace Cancun The Landings St. Lucia The Level at Melia Caribe Tropical The Palms Turks & Caicos The Pyramid at Grand Oasis The Reserve at Paradisus Palma Real The Reserve at Paradisus Punta Cana The Ritz-Carlton, Aruba The Ritz-Carlton, Grand Cayman The Ritz-Carlton, San Juan The Ritz-Carlton, St. Thomas The Royal Suites Punta de Mita by Palladium (Adults-Only) The Royal Suites Yucatan by Palladium (Adults-Only) The Verandah Resort & Spa, Antigua Time Out Hotel Timothy Beach Resort Treasure Cay Beach, Marina & Golf Resort Tropical Princess Beach Resort & Spa Tropicana Aruba Resort & Casino Turtle Beach Resort All Inclusive Valentin Imperial Maya Velas Vallarta Verdanza Hotel VH Gran Ventana Beach Resort VIK Hotel Arena Blanca VIK Hotel Cayena Beach Villa del Arco All Inclusive Beach Resort & Grand Spa Villa del Arco Beach Resort & Grand Spa Villa del Mar - Turks & Caicos Resort Villa del Palmar All Inclusive Beach Resort & Spa Cabo San Lucas Villa del Palmar All Inclusive Beach Resort & Spa Puerto Vallarta Villa del Palmar Beach Resort & Spa Cabo San Lucas Villa del Palmar Cancun Luxury Beach Resort & Spa Villa del Palmar Flamingos All Inclusive Beach Resort and Spa Villa La Estancia Beach Resort & Spa, Nuevo Vallarta Villa La Estancia Cabo San Lucas Villa La Estancia Cabo San Lucas All Inclusive Viva Wyndham Azteca Viva Wyndham Dominicus Beach Viva Wyndham Dominicus Palace Viva Wyndham Fortuna All Inclusive Beach Resort Viva Wyndham Maya Viva Wyndham Tangerine Viva Wyndham V Samana W Retreat & Spa, Vieques Island Warwick Paradise Island Bahamas (Adults-Only) Waves Hotel & Spa West Bay Club Westin Golf Resort & Spa, Playa Conchal Westin Grand Cayman Seven Mile Beach Resort & Spa Westin Resort & Spa Puerto Vallarta Westin Resort & Spa Puerto Vallarta All Inclusive Westin St. John Resort & Villas Westin St. Maarten Dawn Beach Resort & Spa Windjammer Landing Villa Beach Resort Windjammer Landing Villa Beach Resort All Inclusive Windsong Resort Windward Passage Hotel Wyndham Grand Rio Mar Beach Resort & Spa Wyndham Grand Rio Mar Beach Resort & Spa All Inclusive Package Wyndham Reef Resort Grand Cayman Wyndham Reef Resort Grand Cayman, All Inclusive X'tan Ha Resort Zoetry Agua Punta Cana Zoetry Montego Bay Zoetry Paraiso de la Bonita Riviera Maya Zoetry Villa Rolandi Isla Mujeres

By Interest Adult Only Adventure Award Winning Best Beach Budget Friendly Casino Cultural activities Deep Sea Fishing Eco Friendly Family Friendly Foodie Favorites Golf Getaway Honeymoon LGBT Luxury Nightlife Romance Scuba Diving Singles Spa / Wellness Top Rated Watersports Wedding Wheelchair Accessible

Link:

Cheap Caribbean

Bahamas Vacation Packages & Travel Deals – Atlantis

*Savings of up to 40% per night. Savings listed are per night, dbl occ. for Beach Tower Terrace. Savings on other room categories may vary by tower and travel dates. Must be booked by 12/14/16 for travel 11/30/16 through 12/23/16. New bookings only.2 night min stay required.Weekend charges apply. Taxes, levies, fees, service charges, and mandatory gratuities are additional starting from $100 per night per room.Blackout dates apply. This offer is subject to availability and may be changed or cancelled without notice. Offer not combinable with any other offer listed at time of offer. Not applicable to groups.

*Savings of up to 55% per night.Savings listed are per night, dbl occ. for Beach Tower Terrace. Savings on other room categories may vary by tower and travel dates. Must be booked by 12/14/16 for travel 11/30/16 through 12/23/16. New bookings only.2 night min stay required.Weekend charges apply. Taxes, levies, fees, service charges, and mandatory gratuities are additional starting from $89 per night per room.Blackout dates apply. This offer is subject to availability and may be changed or cancelled without notice. Offer not combinable with any other offer listed at time of offer. Not applicable to groups.

1.ATLANTIS RESORT CREDIT UP TO $500:

3 - 4 night resort credit-Beach Towerresort credit is $150 per room, per stay.Coral Towers resort credit is $150 per room, per stay.The Reef resort credit is $150 per room, per stay.Royal Towers resort credit is $250 per room, per stay.The Cove Atlantis resort credit is $300 per room, per stay. Resort Credit is only valid for new bookings and is subject to a 3 night minimum stay.

5 nights and more resort credit- Beach Tower resort credit is $150 per room, per stay. Coral Towers resort credit is $150 per room, per stay. The Reef resort credit is $150 per room, per stay.Royal Towers resort credit is $350 per room, per stay. The Cove Atlantis resort credit is $500 per room, per stay. Resort Credit is only valid for new bookings and is subject to a 5 night minimum stay.

Resort Credit is non-cumulative and may not be used in conjunction with any other Resort Credit within a five day period.Resort credit is a one-time credit and applicable per room per stay. This offer is valid for new bookings only made from 11/29/16-12/14/16. The Resort credit offer is available for stays beginning on 11/30/16and ending on 12/23/16. Stays that cross the effective travel dates will receive the resort credit for their stay. Resort credit cannot be used towards the cost of the room. Credit begins on the date of arrival and expires upon checkout. No credit will be issued for any unused amount. 2 bedroom suites are considered 1 room for purposes of this offer. This offer has no cash value. Resort credit may be used for Dolphin & Marine Adventures, Atlantis Kids Adventures, CRUSH, Atlantis Pals, Atlantis Speedway, Atlantis LIVE performances, internet service or select food and beverage outlets. Resort credit may not be used for laundry service or at any of the following outlets: Mandara Spa, Ocean Club Golf Course, the Casino, Marina Starbucks, Quizno's, the Atlantis Signature shops or any other retail shops. It may not be used on gratuities for food and beverage consumption, in-room movies or phone calls, transportation/transfers, or taxes and Energy Surcharges. Resort credit is not applicable for bookings at the Harborside Resort or The Reef Atlantis. Not applicable for the Beach Tower All-inclusive or Royal Towers All-inclusive Experience. Not applicable to groups. Offer is only applicable on reservation earning Marriott Rewards points and is not applicable on reservation booked using a Marriott Rewards points.

Click Here to view our full Terms & Conditions

See original here:

Bahamas Vacation Packages & Travel Deals - Atlantis

The Camphill Assocation of North America Communities

For Adults

Camphill Village U.S.A. Copake, New York Camphill Village USA is a unique and vibrant life-sharing community of 250 individuals, including over 100 adults with developmental disabilities. Founded in Copake, New York in 1961, Camphill Village USA is the oldest and largest Camphill community in North America and sits on 615 acres of verdant hills, pastures, and beautiful gardens in southern Columbia County.

Camphill Village Kimberton Hills Kimberton, Pennsylvania Camphill Village Kimberton Hills is a dynamic farming, gardening, and handcrafting intentional community that includes adults with developmental disabilities. Over 100 Kimberton Hills residents, living and working side by side, create a caring community for people of all ages and varied abilities. Located on 432 acres of farm, gardens, and woodlands in Chester County, Pennsylvania, Kimberton Hills is also a local center for culture and a model for sound ecological living.

Camphill Village Minnesota Sauk Centre, Minnesota Camphill Village Minnesota is a life-sharing, residential community of fifty people, including adults with disabilities. Their lives, work and celebrations are woven into the rhythms of nature found in the rolling hills, sparkling waterways, and prairie grasslands of Central Minnesota. The community is deeply rooted in the belief that every individual , regardless of limitations, is an independent, spiritual being. Each person is part of the fabric of Community experience and is worthy of recognition, respect and honor.

Camphill Communities Ontario Angus, Ontario, Canada Camphill Communities Ontario provides opportunities for adults with developmental disabilities to live, learn and work together with others in an atmosphere of mutual respect and equality.

Camphill Communities California Soquel, California Camphill Communities California, an intentional community which includes adults with developmental disabilities, is located along the central Pacific coast in the beautiful Monterey Bay area.

Camphill Hudson Hudson, New York Camphill Hudson is a small but growing urban initiative in the thriving community of Hudson, NY. Located two hours north of New York City by train in downtown Hudson, Camphill Hudson is ideally situated for those who wish to contribute to Camphill life and participate in the life of the wider community. Individuals in the Camphill Hudson community make a life for themselves contributing to the city around them.

Heartbeet Lifesharing Hardwick, Vermont Heartbeet is a vibrant lifesharing Camphill community and licensed therapeutic residence that includes adults with developmental disabilities and interweaves the social and agricultural realms for the healing and renewing of our society and the earth. Community members live and work together, in beautiful extended family households, forming a mutually supportive environment that enables each individual to discover and develop his or her unique abilities and potential.

The Cascadia Society North Vancouver, British Columbia, Canada The Cascadia Society is a life-sharing community that includes adults with special needs. Cultural, artistic and therapeutic experiences are provided through residential home care and day activities within the urban setting of Vancouvers North Shore. The Cascadia Society is dedicated to bringing healing to human beings and to the earth. Their primary task is to allow the potential in each person to unfold and to be in harmonious relationship with the environment.

The Ita Wegman Association of BC Duncan, British Columbia, Canada Glenora Farm is a therapeutic farm, one of two Camphill Communities in Western Canada where adults with developmental disabilities live, work and learn together with their caregivers.

Camphill Special School Glenmoore, Pennsylvania Camphill Special Schools mission is to create wholeness for children and youth with intellectual and developmental disabilities through education and therapy in extended family living so that they may be better understood and their disabilities moderated, that they may more fully unfold their potential, and that they more fully and meaningfully participate in life.

Triform Camphill Community Hudson, New York Triform Camphill Community is a residential community for young adults with developmental disabilities. It includes a dynamic mix of over 100 people spanning many generations, cultures and ranges of ability. Forty young adults with social, mental, physical and emotional disabilities, live and work side-by-side with full time volunteer resident staff and the staffs families on a 410 acre biodynamic/organic farm in beautiful Columbia County, NY.

Camphill Soltane Glenmoore, Pennsylvania Camphill Soltane is a life-sharing community of 80 people, including young adults ages 18-25, and adults age 25 and up, with developmental disabilities.

Camphill Ghent Chatham, New York Camphill Ghent is a residential community for elders who appreciate living independently within a lively community, but who would also like occasional help with daily challenges, ranging from housekeeping and cooking to maintenance and driving services.

Plowshare Farm Greenfield, NH Plowshare Farm is an attempt to be responsive to the social, human, spiritual and ecological challenges of our times by working toward creating an environment where every person and every aspect of the natural world can be learned from and valued. They are a small, thriving community where lives are shared, where nourishing the land in turn nourishes the individual who is tending that land, and where animal care creates the potential for people who are usually the care receivers to become the care givers. Nestled on over 200 acres in the countryside of southern New Hampshire, Plowshare Farm provides a peaceful setting of exceptional natural beauty.

Oakwood Lifesharing West Plains, Missouri Through meaningful activities, a healing environment, and truly human companionship, Oakwood Lifesharing encourages each person to master their own life. This mastery occurs in the context of family, community and society. By emphasizing both independence and interdependence, Oakwood promotes individuals to become dignified and effective citizens in the community.

For more information on Camphill Communities Worldwide, visit http://www.camphill.net

Read the original:

The Camphill Assocation of North America Communities

History of Evolution | Internet Encyclopedia of Philosophy

The word "evolution" in its broadest sense refers to change or growth that occurs in a particular order. Although this broad version of the term would include astronomical evolution and the evolution of computer design, this article focuses on the evolution of biological organisms. That use of the term dates back to the ancient Greeks, but today the word is more often used to refer to Darwin's theory of evolution by natural selection. This theory is sometimes crudely referred to as the theory of "survival of the fittest." It was proposed by CharlesDarwin in On the Origin of Species in 1859 and, independently, by Alfred Wallace in 1858although Wallace, unlike Darwin, said the human soul is not the product of evolution.

Greek and medieval references to "evolution" use it as a descriptive term for a state of nature, in which everything in nature has a certain order or purpose. This is a teleological view of nature. For example, Aristotle classified all living organisms hierarchically in his great scala naturae or Great Chain of Being, with plants at the bottom, moving through lesser animals, and on to humans at the pinnacle of creation, each becoming progressively more perfect in form. It was the medieval philosophers, such as Augustine, who began to incorporate teleological views of nature with religion: God is the designer of all creatures, and everything has a purpose and a place as ordained by Him.

In current times, to some, the terms "evolution" and "God" may look like unlikely bed fellows (see the discussion on teleology). This is due primarily to today's rejection by biologists of a teleological view of evolution in favor of a more mechanistic one. The process of rejection is commonly considered to have begun with Descartes and to have culminated in Darwins theory of evolution by natural selection.

Fundamental to natural selection is the idea of change by common descent. This implies that all living organisms are related to each other; for any two species, if we look back far enough we will find that they are descended from a common ancestor. This is a radically different view than Aristotles Great Chain of Being, in which each species is formed individually with its own purpose and place in nature and where no species evolves into a new species. Evolution by natural selection is a purely mechanistic theory of change that does not appeal to any sense of purpose or a designer. There is no foresight or purpose in nature, and there is no implication that one species is more perfect than another. There is only change driven by selection pressures from the environment. Although the modern theory of biological evolution by natural selection is well accepted among professional biologists, there is still controversy about whether natural selection selects for fit genes or fit organisms or fit species.

Evolution by natural selection is a theory about the process of change. Although Darwin's original theory did not specify that genes account for an organism's heritable traits, that is now universally accepted among modern evolutionists. In a given population, natural selection occurs when genetically-based traits that promote survival in one's environment are passed onto future generations and become more frequent in later generations. Organisms develop different survival and reproduction enhancing traits in response to their different environments (with abundance or shortage of food, presence or absence of predators, and so forth) and, given enough time and environmental changes, these small changes can accumulate to form a whole new species. Thus for Darwin there is no sharp distinction between a new variation and a new species. This theory accounts for the diversity of Earth's organisms better than theological design theories or competing scientific theories such as Lamarck's theory that an organism can pass on to its offspringcharacteristics that it acquired during its lifetime.

Evolution by natural selection works on three principles: variation (within a given generation there will be variation in traits, some that aid survival and reproduction and some that dont, and some that have a genetic basis and some that dont); competition (there will be limited resources that individuals must compete for, and traits that aid survival and reproduction will help in competition); and heritability (only traits that aid survival and reproduction and have a genetic basis can passed onto future generations).

Evolution is not so much a modern discovery as some of its advocates would have us believe. It made its appearance early in Greek philosophy, and maintained its position more or less, with the most diverse modifications, and frequently confused with the idea of emanation, until the close of ancient thought. The Greeks had, it is true, no term exactly equivalent to " evolution"; but when Thales asserts that all things originated from water; when Anaximenes calls air the principle of all things, regarding the subsequent process as a thinning or thickening, they must have considered individual beings and the phenomenal world as, a result of evolution, even if they did not carry the process out in detail. Anaximander is often regarded as a precursor of the modem theory of development. He deduces living beings, in a gradual development, from moisture under the influence of warmth, and suggests the view that men originated from animals of another sort, since if they had come into existence as human beings, needing fostering care for a long time, they would not have been able to maintain their existence. In Empedocles, as in Epicurus and Lucretius, who follow in Hs footsteps, there are rudimentary suggestions of the Darwinian theory in its broader sense; and here too, as with Darwin, the mechanical principle comes in; the process is adapted to a certain end by a sort of natural selection, without regarding nature as deliberately forming its results for these ends.

If the mechanical view is to be found in these philosophers, the teleological occurs in Heraclitus, who conceives the process as a rational development, in accordance with the Logos and names steps of the process, as from igneous air to water, and thence to earth. The Stoics followed Heraclitus in the main lines of their physics. The primal principle is, as with him, igneous air. only that this is named God by them with much greater definiteness. The Godhead has life in itself, and develops into the universe, differentiating primarily into two kinds of elements the finer or active, and the coarser or passive. Formation or development goes on continuously, under the impulse of the formative principle, by whatever name it is known, until all is once more dissolved by the ekpyrosis into the fundamental principle, and the whole process begins over again. Their conception of the process as analogous to the development of the seed finds special expression in their term of logos spermatikos. In one point the Stoics differ essentially from Heraclitus. With them the whole process is accomplished according to certain ends indwelling in the Godhead, which is a provident, careful intelligence, while no providence is assumed in Heraclitus.

Empedocles asserts definitely that the sphairos, as the full reconciliation of opposites, is opposed, as the superior, to the individual beings brought into existence by hatred, which are then once more united by love to the primal essence, the interchange of world-periods thus continuing indefinitely. Development is to be found also in the atomistic philosopher Democritus; in a purely mechanical manner without any purpose, bodies come into existence out of atoms, and ultimately entire worlds appear and disappear from and to eternity. Like his predecessors, Deinocritus, deduces organic beings from what is inorganic-moist earth or slime.

Development, as well as the process of becoming, in general, was denied by the Eleatic philosophers. Their doctrine, diametrically opposed to the older thoroughgoing evolutionism, had its influence in determining the acceptance of unchangeable ideas, or forms, by Plato and Aristotle. Though Plato reproduces the doctrine of Heraclitus as to the flux of all things in the phenomenal world, he denies any continuous change in the world of ideas. Change is permanent only in so far as the eternal forms stamp themselves upon individual objects. Though this, as a rule, takes place but imperfectly, the stubborn mass is so far affected that all works out as far as possible for the best. The demiurge willed that all should become as far as possible like himself; and so the world finally becomes beautiful and perfect. Here we have a development, though the principle which has the most real existence does not change; the forms, or archetypal ideas, remain eternally what they are.

In Aristotle also the forms are the real existences, working in matter but eternally remaining the same, at once the motive cause and the effectual end of all things. Here the idea of evolution is clearer than in Plato, especially for the physical world, which is wholly dominated by purpose. The transition from lifeless to living matter is a gradual one, so that the dividing-line between them is scarcely perceptible. Next to lifeless matter comes the vegetable kingdom, which seems, compared with the inorganic, to have life, but appears lifeless compared with the organic. The transition from plants to animals is again a gradual one. The lowest organisms originate from the primeval slime, or from animal differentiation; there is a continual progression from simple, undeveloped types to the higher and more perfect. As the highest stage, the end and aim of the whole process, man appears; all lower forms are merely unsuccessful attempts to produce him. The ape is a transitional stage between man and other viviparous animals. If development has so important a work in Aristotle's physics, it is not less important in his metaphysics. The whole transition from potentiality to actuality (from dynamis toentelecheia) is nothing but a transition from the lower to the higher, everything striving to assimilate itself to the absolutely perfect, to the Divine. Thus Aristotle, like Plato, regards the entire order of the universe as a sort of deification. But the part played in the development by the Godhead, the absolutely immaterial form, is less than that of the forms which operate in matter, since, being already everything,, it is incapable of becoming anything else. Thus Aristotle, despite his evolutionistic notions, does not take the view of a thoroughgoing evolutionist as regards the universe; nor do the Neoplatonists, whose highest principle remains wholly unchanged, though all things emanate from it.

The idea of evolution was not particularly dominant in patristic and scholastic theology and philosophy, both on account of the dualism which runs through them as an echo of Plato and Aristotle, and on account of the generally accepted Christian theory of creation. However, evolution is not generally denied; and with Augustine (De civitate dei, xv. 1) it is taken as the basis for a philosophy of history. Erigena and some of his followers seem to teach a sort of evolution. The issue of finite beings from God is called analysis or resolution in contrast to the reverse or deification the return to God, who once more assimilates all things. God himself, although denominated the beginning, middle, and end, all in all remains unmixed in his own essence, transcendent though immanent in the world. The teaching of. Nicholas of Cusa is similar to Erigena's, though a certain amount of Pythagoreanism comes in here. The world exhibits explicitly what the Godhead implicitly contains; the world is an animated, ordered whole, in which God is everywhere present. Since God embraces all things in himself, he unites all opposites: he is the complicatio omnium contradictoriorum. The idea of evolution thus appears in Nicholas in a rather pantheistic form, but it is not developed.

In spite of some obscurities in his conception of the world Giordano Bruno is a little clearer. According to him God is the immanent first cause in the universe; there is no difference between matter and form; matter, which includes in itself forms and ends, is the source of all becoming and of all actuality. The infinite ether which fills infinite space conceals within itself the nucleus of all things, and they proceed from it according to determinate laws, yet in a teleological manner. Thus the worlds originate not by an arbitrary act, but by an inner necessity of the divine nature. They are natura naturata, as distinguished from the operative nature of God, natitra naturans, which is present in all thin-S as the being- of all that is, the beauty of all that is fair. As in the Stoic teaching, with which Bruno's philosophy has much in common, the conception of evolution comes out clearly both for physics and metaphysics.

Leibniz attempted to reconcile the mechanical-physical and the teleological views, after Descartes, in his Principia philosophitce, excluding all purpose, had explained nature both lifeless and living, as mere mechanism. It is right, however, to point out that Descartes had a metaphysics above his physics, in which the conception of God took an important place, and that thus the mechanical notion of evolution did not really include everything. In Leibnitz the principles of mechanics and physics are dependent upon the direction of a supreme intelligence, without which they would be inexplicable to us. Only by such a preliminary assumption are we able to recognize that one ordered thing follows upon another continuously. It is in this sense that the law of continuity is to be understood, which is of such great importance in Leibnitz. At bottom it is the same as the law of ordered development. The genera of all beings follow continuously one upon another, and between the main classes, as between animals and vegetables, there must be a continuous sequence of intermediate beings. Here again, however, evolution is not taught in its most thorough form, since the divine monad, of God, does not come into the world but transcends it.

Among the German philosophers of the eighteenth century Herder must be mentioned first of the pioneers of modern evolutionism. He lays down the doctrine of a continuous development in the unity of nature from inorganic to organic, from the stone to the plant, from the plant to the animal, and from the animal to man. As nature develops according to fixed laws and natural conditions, so does history, which is only a continuation of the process of nature. Both nature and history labor to educate man in perfect humanity; but as this is seldom attained, a future life is suggested. Lessing had dwelt on the education of the human race as a development to the higher and more perfect. It is only recently that the significance of Herder, in regard to the conception and treatment of historic development, has been adequately recognized. Goethe also followed out the idea of evolution in his zoological and botanical investigations, with his theory of the metamorphosis of plants and his endeavor to discover unity in different organisms.

Kant is also often mentioned as having been an early teacher of the modern theory of descent. It is true he considers the analogy of the forms which he finds in various classes of organisms a ground for supposing that they may have come originally from a common source. He calls the hypothesis that specifically different being have originated one from the other "a daring adventure of the reason." But he entertains the thought that in a later epoch "an orang-outang or a chimpanzee may develop the organs which serve for walking, grasping objects, and speaking-in short, that lie may evolve the structure of man, with an organ for the use of reason, which shall gradually develop itself by social culture." Here, indeed, important ideas of Darwin were anticipated; but Kant's critical system was such that development could have no predominant place in it.

The idea of evolution came out more strongly in his German idealistic successors, especially in Schelling, who regarded nature as a preliminary stage to mind, and the process of physical development as continuing in history. The unconscious productions of nature are only unsuccessful attempts to reflect itself; lifeless nature is an immature intelligence, so that in its phenomena an intelligent character appears only unconsciously. Its highest aim, that, of becoming an object to itself, is only attained in the highest and last reflection-in man, or in what we call reason, through which for the first time nature returns perfectly upon itself. All stages of nature are connected by a common life, and show in their development a conclusive unity. The course of history as a whole must be conceived as offering a gradually progressive revelation of the Absolute. For this he names three periods-that of fate, that of nature, and that of providence, of which we are now in the second. Schelling's followers carried the idea of development somewhat further than their master. This is true especially of Oken, who conceives natural science as the science of the eternal transformation of God into the world, of the dissolution of the Absolute into plurality, and of its continuous further operation in this plurality. The development is continued through the vegetable and animal kingdoms up to man, who in his art and science and polity completely establishes the will of nature. Oken, it is true, conceived man as the sole object of all animal development, so that the lower stages are only abortive attempts to produce him-a theory afterward controverted by Ernst von Baer and Cuvier, the former of whom, standing somewhat in opposition to Darwin, is of great interest to the student of the history of the theory of evolution.

Some evolutionistic ideas are found in Krause and Schleiermacher; but Hegel, with his absolute idealism, is a more notable representative of them. In his system philosophy is the science of the Absolute, of the absolute reason developing or unfolding itself. Reason develops itself first in the abstract element of thought, then expresses itself externally in nature, and finally returns from this externalization into itself in mind. As Heraclitus had taught eternal becoming, so Hegel, who avowedly accepted all the propositions of the Ephesian philosopher in his logic, taught eternal proceeding. The difference between the Greek and the German was that the former believed in the flux of matter, of fire transmuting itself by degrees into all things, and in nature as the sole existence, outside of which there was nothing; while the latter conceived the abstract idea or reason as that which really is or becomes, and nature as only a necessary but transient phase in the process of development. With Heraclitus evolution meant the return of all things into the primal principle followed by a new world-development; with Hegel it was an eternal process of thought, giving no answer to the question as to the end of historical development.

While Heraclitus had laid down his doctrine of eternal becoming rather by intuition than on the ground of experience, and the entire evolutionary process of Hegel had been expressly conceived as based on pure thought, Darwin's and Wallace's epoch-making doctrine rested upon a vast mass of ascertained facts. He was, of course, not the first to lay down the origin of species one from another as a formal doctrine. Besides those predecessors of his to whom allusion has already been made, two others may be mentioned here: his grandfather, Erasmus Darwin, who emphasized organic variability; and still more Lamarck, who denied the immutability of species and forms, and claimed to have demonstrated by observation the gradual development of the animal kingdom. What is new in Charles Darwin is not his theory of descent, but its confirmation by the theory of natural selection and the survival of the fittest in the struggle for existence. Thus a result is brought about which corresponds as far as possible to a rational end in a purely mechanical process, without any cooperation of teleological principles, without any innate tendency in the organisms to proceed to a higher stage. This theory postulates in the later organisms deviations from the earlier ones; and that these deviations, in so far as they are improvements, perpetuate themselves and become generic marks of differentiation. This, however, imports a difficulty, since the origin of the first of these deviations is inexplicable. The differentia of mankind, whom Darwin, led by the force of analogy, deduces from a species of apes, consists in intellect and moral qualities, but comes into existence only by degrees. The moral sensibilities develop from the original social impulse innate in man; this impulse is an effort to secure not so much individual happiness as the general welfare.

It would be impossible to name here all those who, in different countries, have followed in Darwin's footsteps, first in the biological field and then in those of psychology, ethics, sociology, and religion. They have carried his teaching further in several directions, modifying it to some extent and making it fruitful, while positivism has not seldom come into alliance with it. In Germany Ernst Haeckel must be mentioned with his biogenetic law, according to which the development of the individual is an epitome of the history of the race, and with his less securely grounded notion of the world-ether as a creative deity. In France Alfred Fouillee worked out a theory of idea-forces, a combination of Platonic idealism with English (though not specifically Darwinian) evolutionism. Marie-Jean Guyau understood by evolution a life led according to the fundamental law that the most intensive life is also the most extensive. He develops his ethics altogether from the facts of the social existence of mankind, and his religion is a universal sociomorphism, the feeling of the unity of man with the entire cosmos.

The most careful and thorough development of the whole system took place in England. For a long time it was represented principally by the work of Herbert Spencer, who had come out for the principle of evolution even before the publication of Darwin's Origin of Species. He carries the idea through the whole range of philosophy in his great System of Synthetic Philosophy and undertakes to show that development is the highest law of all nature, not merely of the organic. As the foundation of ill that exists, though itself unknowable and only revealing itself in material and mental forms, he places a power, the Absolute, of which we have but an indefinite conception. The individual processes of the world of phenomena are classed under the head of evolution, or extension of movement, with which integration of matter, union into a single whole, is connected, and dissolution or absorption of movement, which includes disintegration of matter, the breaking of connection. Both processes go on simultaneously, and include the history of every existence which we can perceive. In the course of their development the organisms incorporate matter with themselves; the plant grows by taking into itself elements which have previously existed in the form of gases, and the animal by assimilating elements found in plants and in other animals. The same sort of integration is observed in social organisms, as when nomadic families unite into a tribe, or subjects under a prince, and princes under a king. In like manner integration is evident in the development of language, of art, and of science, especially philosophy. But as the individuals unite into a whole, a strongly marked differentiation goes on at the same time, as in the distinction between the surface and the interior of the earth, or between various climates. Natural selection is not considered necessary to account for varying species, but gradual conditions of life create them. The aim of the development is to show a condition of perfect balance in the whole; when this is attained, the development, in virtue of the continuous operation of external powers, passes into dissolution. Those epochs of development and of dissolution follow alternately upon each other. This view of Spencer suggests the hodos ano and hodos kato of Heraclitus, and his flowing back of individual things into the primal principle.

Similar principles are carried out not only for organic phenomena but also for mental and social; and on the basis of the theory of evolution a remarkable combination of intuitionism and empiricism is achieved. In his principles of sociology Spencer lays down the laws of hyperorganic evolution, and gives the various stages of human customs and especially of religious ideas, deducing all religion much too one-sidedly from ancestor-worship. The belief in an immortal " second self " is explained by such phenomena as shadows and echoes. The notion of gods is suppose to arise from the idea of a ghostly life after death. In his Principles of Ethics he attempts a similar compromise between intuitionism and empiricism, deducing the consciousness of duty from innumerable accumulated experiences. The compelling element in moral actions, originally arising from fear of religious, civil, or social punishment, disappears with the development of true morality. There is no permanent opposition between egoism and altruism, but the latter develops simultaneously with the former.

Spencer's ethical principles were fruitfully modified, especially by Sir Leslie Stephen and S. Alexander, though with constant adherence to the idea of development. While the doctrine of evolution in Huxley and Tyndall is associated with agnosticism, and thus freed from all connection with metaphysics, as indeed was the case with Spencer, in spite of his recognition of the Absolute as the necessary basis for religion and for thought, in another direction an attempt was made to combine evolutionism closely with a metaphysics in which the idea of God was prominent. Thus the evolution theory of Clifford and Romanes led them to a thoroughgoing monism, and that of J. M. F. Schiller to pluralism. According to the last-named a personal deity, limited in power, exists side by side with a multitude of intellectual beings, who existed before the formation of the world in a chaotic state as absolutely isolated individuals. The process of world formation begins with the decision of the divine Spirit to bring a harmony of the cosmos out of these many existences. Though Spencer's influence in philosophical development was not so great in Germany as in England, the idea of development has continued in recent years to exert no little power. Space forbids more than a mention of Lotze's teleological idealism; Von Harttmann's absolute monism, in which the goal of the teleological development of the universe is the reversion of the will into not-willing; Wundt's metaphysics of the will, according to which the world is a development, an eternal becoming, in which nature is a preliminary stage to mind; and Nietzsche's individualism, the final point of which is the development of the superman.

The author of this article is anonymous. The IEP is actively seeking an author who will write a replacement article.

View post:

History of Evolution | Internet Encyclopedia of Philosophy

Virtual Reality – Virtual Reality

Virtual Reality

Welcome to Virtual Reality Society (VRS). A one-stop information and news resource for virtual reality and its related technologies. Here you will find a wide range of information on the exciting world of virtual reality, from comprehensive material for beginners to interesting and deep discussions of virtual realitys problems, implications and applications.

Our mission is to become the definitive source of virtual reality information and we constantly strive to achieve this goal. Be sure to bookmark us and check back regularly for new features and new sections on our site.

Virtual reality is essentially the use of technology to create the illusion of presence in an environment that isnt really there. It works by sending information to various senses, such as sight and hearing, that fool our brains into experiencing something virtual. The illusion is often completed by the presence of interactivity, in other words the virtual world responds in some way to your presence.

Of course, generating such virtual worlds by technological means is quite a complex process and requires advanced computer hardware and software to accomplish, not to mention the complexity of peripheral devices that perform virtual reality specific functions themselves.

Its this historical cost of virtual reality that has confined its application to areas where it is either infeasible to simulate something in another way or the danger of doing so would be too great. Aviation and medicine, for example, have made use of virtual reality to allow pilots and surgeons to train in their respective professions in a highly realistic manner without risking life, limb or infrastructure.

There have been attempts to translate these high-end virtual reality technologies to the consumer space before, but the technological limitations of the day meant that not only were these products not particularly good, but many were actively unpleasant to use. Issues such as motion sickness brought on by slow and laggy visuals, for example, would be enough to put anyone off from trying the technology a second time.

Today however, thanks to the march of technological innovation, virtual reality is set to undergo a renaissance in the consumer world. Virtual Reality (VR) and its close cousin Augmented Reality (AR) are going to become ever more common features in daily life, just like smartphones and the internet. Youll likely find that no matter the area you work in, virtual reality will have some impact on it in the near to medium term. So, dont get caught out by the next big consumer technology revolution! Join us in exploring the state of the art as well as the past and future of virtual reality.

We have series of articles about the various applications of this technology and the equipment used, for example, VR glasses (or goggles as they are sometimes called). This is where you can find out more about the two types of virtual environments:

Both of these result in very different types of experiences.

A virtual environment needs to place the user at its centre and ensure that he or she has a productive experience which they are likely to repeat. But a common problem with virtual reality systems is motion sickness which is caused by poor ergonomics and a lack of awareness of the physical needs of the user. This, as one of the disadvantages of virtual reality, is something which needs to be addressed.

There are many other sections to discover here at VRS, so feel free to explore every part of the site. If you have any questions or comments you can find us on the contact page.

Follow this link:

Virtual Reality - Virtual Reality

The Automation Conference

Stay on top of the latest advancements in industrial automation. Plan now to attend May 23-24 in Chicago.

The Automation Conference & Expo is the leading peer-to-peer educational and networking event for industrial automation professionals. As an attendee, youll learn why todays automation innovations are critical for your operation. Our 2017 knowledge exchange will take place May 23-24 at the Chicago Marriott OHare, offering technology end-users the ability to:

- get tips on automation implementation from industrys leading companies - choose from over two dozen educational sessions - network with experts and automation thought leaders - access practical insights from experienced practitioners

Preview our 2017 program here.

This year's program explores todays hottest manufacturing topics, such as:

The Automation Conference & Expo is designed for automation professionals in the process industries, discrete manufacturing and packaging, and includes general and track sessions; in-depth Technology Workshops and tabletop exhibits, staffed by solutions experts.

Who should attend:

Our pre-conference OMAC PackML/TR88.00.02 Workshop will be offered on May 22 by The Organization for Machine Automation and Control (OMAC), taking place from 1:00 pm until 5:00 pm. Check back soon for more details.

To receive event alerts, please contact Ashley Friedman.

Though most Internet of Things (IoT) discussions focus on cloud storage of connected device data and the endless analytical and decision-making possibilities it enables, the real world applicability of the concept still seems far off for many industrial companies...Read more

Amid all the change thats taken place in the industrial automation sector over the past two decades, one constant has been the protocols required to connect systems and devices...Read more

Additive manufacturing/3D printing has been one of the hottest topics in manufacturing over the past several years as the technology proves its viability not only in prototyping applications, but inproducing components for use in operating machinery...Read more

Last month, the great and the good amongst manufacturing, process plant and packaging professionals descended on Chicago, Illinois, to attend The Automation Conference... Read more

"Networking opportunities were tremendous."

"This is a formidable conference. Great presentations, event organization and the right number and quality of attendees."

"Great conference-well worth it thank you!"

"Great chance to meet with a wide variety of people in the automation industry."

"Networking opportunities were very good due to the quality of attendees."

"Chance to meet other professionals and discuss the common issues we all feel."

"Real world examples...hearing about others' successes and failures."

"Learned the latest developments, found trends and future directions."

"Love this event."

Thanks to our TAC sponsors, who help fund this educational scholarship, awarded during The Automation Conference.

Read this article:

The Automation Conference

Comet Facts – Interesting Facts about Comets

Comet ISON stardustobservatory.org/images.php?page=details&id=363

A comet is a very small solar system body made mostly of ices mixed with smaller amounts of dust and rock. Most comets are no larger than a few kilometres across. The main body of the comet is called the nucleus, and it can contain water, methane, nitrogen and other ices.

When a comet is heated by the Sun, its ices begin to sublimate (similar to the way dry ice fizzes when you leave it in sunlight). The mixture of ice crystals and dust blows away from the comet nucleus in the solar wind, creating a pair of tails. The dust tail is what we normally see when we view comets from Earth.

A plasma tail also forms when molecules of gas are excited by interaction with the solar wind. The plasma tail is not normally seen with the naked eye, but can be imaged. Comets normally orbit the Sun, and have their origins in the Oort Cloud and Kuiper Belt regions of the outer solar system.

There are many misconceptions about comets, which are simply pieces of solar system ices travelling in orbit around the Sun. Here are some fascinating and true facts about comets.

Comets come in several categories. The most common are periodic and non-periodic.

In the past, comets were named for their discoverers, such as Comet Halley for Sir Edmond Halley. In modern times, comet names are governed by rules set forth by the International Astronomical Union (IAU). A comet is given an official designation, and can also be identified by the last names of up to three independent discoverers.

Heres how it works. Once a comet has been confirmed, the following naming rules are followed. First, if the comet is a periodic comet, then it is indicated with a P/ followed by the year of its discovery, a letter indicating the half-month in which it was discovered, followed by a number indicating its order of discovery. So, for example, the second periodic comet found in the first half of January, 2015 would be called P/2015 A2.

A non-periodic comet would be indicated with a C/ followed by the year of its discovery, a letter indicating the half-month in which it was discovered, followed by a number indicating its order of discovery.

If a comet is independently discovered by three people named Smith, Jones, and Petersen, it could also be called Comet Smith-Jones-Petersen, in addition to its formal designation. Today, many comets are found through automated instrument searches, and so the formal designations are more commonly used.

Well-known comets include the non-periodic comets Hale-Bopp (C/1995 O1), Hyakutake (C/1996 B2), McNaught (C2006 P1), and Lovejoy (C/2011 W3). These flared brightly in our skies and then faded into obscurity.

In addition, Comet Shoemaker-Levy 9 (D/1993 F2) was spotted after it had broken up after a close call with Jupiter. (The D in its proper designation means it has disappeared or is determined to no longer exist). More than a year later, the pieces of the comet crashed into Jupiter.

The periodic Comet Halley (1P/Halley) is the most famous in history. It returns to the inner solar system once every 76 years. Other well-known periodic comets include 2P/Encke, which appears ever 3.3 years and 9P/Tempel (Tempel 2), which was visited by the Deep Impact and Stardust probes, and makes perihelion around the Sun every 5.5 years.

See more here:

Comet Facts - Interesting Facts about Comets

Mind uploading – Transhumanism Wiki – Wikia

In transhumanism and science fiction, mind uploading (also occasionally referred to by other terms such as mind transfer, whole brain emulation, or whole body emulation) refers to the hypothetical transfer of a human mind to a substrate different from a biological brain, such as a detailed computer simulation of an individual human brain.

The human brain contains a little more than 100 billion nerve cells called neurons, each individually linked to other neurons by way of connectors called axons and dendrites. Signals at the junctures (synapses) of these connections are transmitted by the release and detection of chemicals known as neurotransmitters. The brain contains cell types other than neurons (such as glial cells), some of which are structurally similar to neurons, but the information processing of the brain is thought to be conducted by the network of neurons.

Current biomedical and neuropsychological thinking is that the human mind is a product of the information processing of this neural network. To use an analogy from computer science, if the neural network of the brain can be thought of as hardware, then the human mind is the software running on it.

Mind uploading, then, is the act of copying or transferring this "software" from the hardware of the human brain to another processing environment, typically an artificially created one.

The concept of mind uploading then is strongly mechanist, relying on several assumptions about the nature of human consciousness and the philosophy of artificial intelligence. It assumes that strong AI machine intelligence is not only possible, but is indistinguishable from human intelligence, and denies the vitalist view of human life and consciousness.

Mind uploading is completely speculative at this point in time; no technology exists which can accomplish this.

The relationship between the human mind and the neural circuitry of the brain is currently poorly understood. Thus, most theoretical approaches to mind uploading are based on the idea of recreating or simulating the underlying neural network. This approach would theoretically eliminate the need to understand how such a system works if the component neurons and their connections can be simulated with enough accuracy.

It is unknown how precise the simulation of such a neural network would have to be to produce a functional simulation of the brain. It is possible, however, that simulating the functions of a human brain at the cellular level might be much more difficult than creating a human level artificial intelligence, which relied on recreating the functions of the human mind, rather than trying to simulate the underlying biological systems.[citation needed]

Thinkers with a strongly mechanistic view of human intelligence (such as Marvin Minsky) or a strongly positive view of robot-human social integration (such as Hans Moravec and Ray Kurzweil) have openly speculated about the possibility and desirability of this.

In the case where the mind is transferred into a computer, the subject would become a form of artificial intelligence, sometimes called an infomorph or "nomorph." In a case where it is transferred into an artificial body, to which its consciousness is confined, it would also become a robot. In either case it might claim ordinary human rights, certainly if the consciousness within was feeling (or was doing a good job of simulating) as if it were the donor.

Uploading consciousness into bodies created by robotic means is a goal of some in the artificial intelligence community. In the uploading scenario, the physical human brain does not move from its original body into a new robotic shell; rather, the consciousness is assumed to be recorded and/or transferred to a new robotic brain, which generates responses indistinguishable from the original organic brain.

The idea of uploading human consciousness in this manner raises many philosophical questions which people may find interesting or disturbing, such as matters of individuality and the soul. Vitalists would say that uploading was a priori impossible. Many people also wonder whether, if they were uploaded, it would be their sentience uploaded, or simply a copy.

Even if uploading is theoretically possible, there is currently no technology capable of recording or describing mind states in the way imagined, and no one knows how much computational power or storage would be needed to simulate the activity of the mind inside a computer. On the other hand, advocates of uploading have made various estimates of the amount of computing power that would be needed to simulate a human brain, and based on this a number have estimated that uploading may become possible within decades if trends such as Moore's Law continue.[citation needed]

If it is possible for human minds to be modeled and treated as software objects which can be instanced multiple times, in multiple processing environments, many potentially desirable possibilities open up for the individual.

If the mental processes of the human mind can be disassociated from its original biological body, it is no longer tied to the limits and lifespan of that body. In theory, a mind could be voluntarily copied or transferred from body to body indefinitely and therefore become immortal, or at least exercise conscious control of its lifespan.

Alternatively, if cybernetic implants could be used to monitor and record the structure of the human mind in real time then, should the body of the individual be killed, such implants could be used to later instance another working copy of that mind. It is also possible that periodic backups of the mind could be taken and stored external to the body and a copy of the mind instanced from this backup, should the body (and possibly the implants) be lost or damaged beyond recovery. In the latter case, any changes and experiences since the time of the last backup would be lost.

Such possibilities have been explored extensively in fiction: This Number Speaks, Nancy Farmer's The House of the Scorpion, Newton's Gate, John Varley's Eight Worlds series, Greg Egan's Permutation City, Diaspora, Schild's Ladder and Incandescence, the Revelation Space series, Peter Hamilton's Pandora's Star duology, Bart Kosko's Fuzzy Time, Armitage III series, the Takeshi Kovacs universe, Iain M. Banks Culture novels, Cory Doctorow's Down and Out in the Magic Kingdom, and the works of Charles Stross. And in television sci-fi shows: Battlestar Galactica, Stargate SG-1, among others.

Another concept explored in science fiction is the idea of more than one running "copy" of a human mind existing at once. Such copies could either be full copies, or limited subsets of the complete mentality designed for a particular limited functions. Such copies would allow an "individual" to experience many things at once, and later integrate the experiences of all copies into a central mentality at some point in the future, effectively allowing a single sentient being to "be many places at once" and "do many things at once".

The implications of such entities have been explored in science fiction. In his book Eon, Greg Bear uses the terms "partials" and "ghosts", while Charles Stross's novels Accelerando and Glasshouse deal with the concepts of "forked instances" of conscious beings as well as "backups".

In Charles Sheffield's Tomorrow and Tomorrow, the protagonist's consciousness is duplicated thousands of times electronically and sent out on probe ships and uploaded into bodies adapted to native environments of different planets. The copies are eventually reintegrated back into the "master" copy of the consciousness in order to consolidate their findings.

Such partial and complete copies of a sentient being again raise issues of identity and personhood: is a partial copy of sentient being itself sentient? What rights might such a being have? Since copies of a personality are having different experiences, are they not slowly diverging and becoming different entities? At what point do they become different entities?

If the body and the mind of the individual can be disassociated, then the individual is theoretically free to choose their own incarnation. They could reside within a completely human body, within a modified physical form, or within simulated realities. Individuals might change their incarnations many times during their existence, depending on their needs and desires.

Choices of the individuals in this matter could be restricted by the society they exist within, however. In the novel Eon by Greg Bear, individuals could incarnate physically (within "natural" biological humans, or within modified bodies) a limited number of times before being legally forced to reside with the "city memory" as infomorphic "ghosts".

Once an individual is moved to virtual simulation, the only input needed would be energy, which would be provided by large computing device hosting those minds. All the food, drink, moving, travel or any imaginable thing would just need energy to provide those computations.

Almost all scientists, thinkers and intelligent people would be moved to this virtual environment once they die. In this virtual environment, their brain capacity would be expanded by speed and storage of quantum computers. In virtual environment idea and final product are not different. This way more and more innovations will be sent to real world and it will speed up our technological development.

Regardless of the techniques used to capture or recreate the function of a human mind, the processing demands of such venture are likely to be immense.

Henry Markram, lead researcher of the "Blue Brain Project", has stated that "it is not [their] goal to build an intelligent neural network", based solely on the computational demands such a project would have[1].

Advocates of mind uploading point to Moore's law to support the notion that the necessary computing power may become available within a few decades, though it would probably require advances beyond the integrated circuit technology which has dominated since the 1970s. Several new technologies have been proposed, and prototypes of some have been demonstrated, such as the optical neural network based on the silicon-photonic chip (harnessing special physical properties of Indium Phosphide) which Intel showed the world for the first time on September 18, 2006.[3] Other proposals include three-dimensional integrated circuits based on carbon nanotubes (researchers have already demonstrated individual logic gates built from carbon nanotubes[4]) and also perhaps the quantum computer, currently being worked on internationally as well as most famously by computer scientists and physicists at the IBM Almaden Research Center, which promises to be useful in simulating the behavior of quantum systems; such ability would enable protein structure prediction which could be critical to correct emulation of intracellular neural processes.

Present methods require use of massive computational power (as the BBP does with IBM's Blue Gene Supercomputer) to use the essentially classical computing architecture for serial deduction of the quantum mechanical processes involved in ab initio protein structure prediction. If necessary, should the quantum computer become a reality, its capacity for exactly such rapid calculations of quantum mechanical physics may well help the effort by reducing the required computational power per physical size and energy needs, as Markram warns would be needed (and thus why he thinks it would be difficult, besides unattractive) should an entire brain's simulation, let alone emulation (at both cellular and molecular levels) be feasibly attempted. Reiteration may also be useful for distributed simulation of a common, repeated function (e.g., proteins).

Ultimately, nano-computing is projected by some[citation needed] to hold the requisite capacity for computations per second estimated necessary, in surplus. If Kurzweil's Law of Accelerating Returns (a variation on Moore's Law) shows itself to be true, the rate of technological development should accelerate exponentially towards the technological singularity, heralded by the advent of viable though relatively primitive mind uploading and/or "strong" (human-level) AI technologies, his prediction being that the Singularity may occur around the year 2045.[5]

The structure of a neural network is also different from classical computing designs. Memory in a classical computer is generally stored in a two state design, or bit, although one of the two components is modified in dynamic RAM and some forms of flash memory can use more than two states under some circumstances. Gates inside central processing units will often also use this two state or digital type of design as well. In some ways a neural network or brain could be thought of like a memory unit in a computer, but with an extremely vast number of states, corresponding with the total number of neurons. Beyond that, whether the action potential of a neuron will form, based upon the summation of the inputs of different dendrites, might be something that is more analog in nature than that which happens in a computer. One great advantage that a modern computer has over a biological brain, however, is that the speed of each electronic operation in a computer is many orders of magnitude faster than the time scales involved for the firing and transmission of individual nerve impulses. A brain, however, uses far more parallel processing than exists in most classical computing designs, and so each of the slower neurons can make up for it by operating at the same time.

There are many ethical issues concerning mind uploading. Viable mind uploading technology might challenge the ideas of human immortality, property rights, capitalism, human intelligence, an afterlife, and the Abrahamic view of man as created in God's image. These challenges often cannot be distinguished from those raised by all technologies that extend human technological control over human bodies, e.g. organ transplant. Perhaps the best way to explore such issues is to discover principles applicable to current bioethics problems, and question what would be permissible if they were applied consistently to a future technology. This points back to the role of science fiction in exploring such problems, as powerfully demonstrated in the 20th century by such works as Brave New World and Nineteen Eighty-Four, each of which frame current ethical problems in a future environment where those have come to dominate the society.

Another issue with mind uploading is whether an uploaded mind is really the "same" sentience, or simply an exact copy with the same memories and personality. Although this difference would be undetectable to an external observer (and the upload itself would probably be unable to tell), it could mean that uploading a mind would actually kill it and replace it with a clone. Some people would be unwilling to upload themselves for this reason. If their sentience is deactivated even for a nanosecond, they assert, it is permanently wiped out. Some more gradual methods may avoid this problem by keeping the uploaded sentience functioning throughout the procedure.

True mind uploading remains speculative. The technology to perform such a feat is not currently available, however a number of possible mechanisms, and research approaches, have been proposed for developing mind uploading technology.

Since the function of the human mind, and how it might arise from the working of the brain's neural network, are poorly understood issues, many theoretical approaches to mind uploading rely on the idea of emulation. Rather than having to understand the functioning of the human mind, the structure of underlying neural network is captured and simulated with a computer system. The human mind then, theoretically, is generated by the simulated neural network in an identical fashion to it being generated by the biological neural network.

These approaches require only that we understand the nature of neurons and how their connections function, that we can simulate them well enough, that we have the computational power to run such large simulations, and that the state of the brain's neural network can be captured with enough fidelity to create an accurate simulation.

A possible method for mind uploading is serial sectioning, in which the brain tissue and perhaps other parts of the nervous system are frozen and then scanned and analyzed layer by layer, thus capturing the structure of the neurons and their interconnections[6]. The exposed surface of frozen nerve tissue would be scanned (possibly with some variant of an electron microscope) and recorded, and then the surface layer of tissue removed (possibly with a conventional cryo-ultramicrotome if scanning along an axis, or possibly through laser ablation if scans are done radially "from the outside inwards"). While this would be a very slow and labor intensive process, research is currently underway to automate the collection and microscopy of serial sections[7]. The scans would then be analyzed, and a model of the neural net recreated in the system that the mind was being uploaded into.

There are uncertainties with this approach using current microscopy techniques. If it is possible to replicate neuron function from its visible structure alone, then the resolution afforded by a scanning electron microscope would suffice for such a technique[7]. However, as the function of brain tissue is partially determined by molecular events (particularly at synapses, but also at other places on the neuron's cell membrane), this may not suffice for capturing and simulating neuron functions. It may be possible to extend the techniques of serial sectioning and to capture the internal molecular makeup of neurons, through the use of sophisticated immunohistochemistry staining methods which could then be read via confocal laser scanning microscopy[citation needed].

A more advanced hypothetical technique that would require nanotechnology might involve infiltrating the intact brain with a network of nanoscale machines to "read" the structure and activity of the brain in situ, much like the electrode meshes used in current brain-computer interface research, but on a much finer and more sophisticated scale. The data collected from these probes could then be used to build up a simulation of the neural network they were probing, and even check the behavior of the model against the behavior of the biological system in real time.

In his 1998 book, Mind children, Hans Moravec describes a variation of this process. In it, nanomachines are placed in the synapses of the outer layer of cells in the brain of a conscious living subject. The system then models the outer layer of cells and recreates the neural net processes in whatever simulation space is being used to house the uploaded consciousness of the subject. The nanomachines can then block the natural signals sent by the biological neurons, but send and receive signals to and from the simulated versions of the neurons. Which system is doing the processing biological or simulated can be toggled back and forth, both automatically by the scanning system and manually by the subject, until it has been established that the simulation's behavior matches that of the biological neurons and that the subjective mental experience of the subject is unchanged. Once this is the case, the outer layer of neurons can be removed and their function turned solely over to the simulated neurons. This process is then repeated, layer by layer, until the entire biological brain of the subject has been scanned, modeled, checked, and disassembled. When the process is completed, the nanomachines can be removed from the spinal column of the subject, and the mind of the subject exists solely within the simulated neural network.

Alternatively, such a process might allow for the replacement of living neurons with artificial neurons one by one while the subject is still conscious, providing a smooth transition from an organic to synthetic brain - potentially significant for those who worry about the loss of personal continuity that other uploading processes may entail. This method has been likened to upgrading the whole internet by replacing, one by one, each computer connected to it with similar computers using newer hardware.

While many people are more comfortable with the idea of the gradual replacement of their natural selves than they are with some of the more radical and discontinuous mental transfer, it still raises questions of identity. Is the individual preserved in this process, and if not, at what point does the individual cease to exist? If the original entity ceases to exist, what is the nature and identity of the individual created within the simulated neural network, or can any individual be said to exist there at all? This gradual replacement leads to a much more complicated and sophisticated version of the Ship of Theseus paradox.

It may also be possible to use advanced neuroimaging technology (such as Magnetoencephalography) to build a detailed three-dimensional model of the brain using non-invasive and non-destructive methods. However, current imaging technology lacks the resolution needed to gather the information needed for such a scan.

Such a process would leave the original entity intact, but the existence, nature, and identity of the resulting being in the simulated network are still open philosophical questions.

Another recently conceived possibility[citation needed] is the use of genetically engineered viruses to attach to synaptic junctions, and then release energy-emitting molecular compounds, which could be detected externally, and used to generate a functional model of the synapses in question, and, given enough time, the whole brain and nervous system.

An alternate set of possible theoretical approaches to mind uploading would require that we first understand the functions of the human mind sufficiently well to create abstract models of parts, or the totality, of human mental processes. It would require that strong AI be not only a possibility, but that the techniques used to create a strong AI system could also be used to recreate a human type mentality.

Such approaches might be more desirable if the abstract models required less computational power to execute than the neural network simulation of the emulation techniques described above.

Another theoretically possible method of mind uploading from organic to inorganic medium, related to the idea described above of replacing neurons one at a time while consciousness remained intact, would be a much less precise but much more feasible (in terms of technology currently known to be physically possible) process of "cyborging". Once a given person's brain is mapped, it is replaced piece-by-piece with computer devices which perform the exact same function as the regions preceding them, after which the patient is allowed to regain consciousness and validate that there has not been some radical upheaval within his own subjective experience of reality. At this point, the patient's brain is immediately "re-mapped" and another piece is replaced, and so on in this fashion until, the patient exists on a purely hardware medium and can be safely extricated from the remaining organic body.

However, critics contend[citation needed] that, given the significant level of synergy involved throughout the neural plexus, alteration of any given cell that is functionally correspondent with (a) neighboring cell(s) may well result in an alteration of its electrical and chemical properties that would not have existed without interference, and so the true individual's signature is lost. Revokability of that disturbance may be possible with damage anticipation and correction (seeing the original by the particular damage rendered unto it, in reverse chronological fashion), although this would be easier in a stable system, meaning a brain subjected to cryosleep (which would imbue its own damage and alterations).[citation needed]

It has also been suggested (for example, in Greg Egan's "jewelhead" stories[8]) that a detailed examination of the brain itself may not be required, that the brain could be treated as a black box instead and effectively duplicated "for all practical purposes" by merely duplicating how it responds to specific external stimuli. This leads into even deeper philosophical questions of what the "self" is.

On June 6, 2005 IBM and the Swiss Federal Institute of Technology in Lausanne announced the launch of a project to build a complete simulation of the human brain, entitled the "Blue Brain Project".[9] The project will use a supercomputer based on IBM's Blue Gene design to map the entire electrical circuitry of the brain. The project seeks to research aspects of human cognition, and various psychiatric disorders caused by malfunctioning neurons, such as autism. Initial efforts are to focus on experimentally accurate, programmed characterization of a single neocortical column in the brain of a rat, as it is very similar to that of a human but at a smaller scale, then to expand to an entire neocortex (the alleged seat of higher intelligence) and eventually the human brain as a whole.

It is interesting to note that the Blue Brain project seems to use a combination of emulation and simulation techniques. The first stage of their program was to simulate a neocortical column at the molecular level. Now the program seems to be trying to create a simplified functional simulation of the neocortical column in order to simulate many of them, and to model their interactions.

With most projected mind uploading technology it is implicit that "copying" a consciousness could be as feasible as "moving" it, since these technologies generally involve simulating the human brain in a computer of some sort, and digital files such as computer programs can be copied precisely. It is also possible that the simulation could be created without the need to destroy the original brain, so that the computer-based consciousness would be a copy of the still-living biological person, although some proposed methods such as serial sectioning of the brain would necessarily be destructive. In both cases it is usually assumed that once the two versions are exposed to different sensory inputs, their experiences would begin to diverge, but all their memories up until the moment of the copying would remain the same.

By many definitions, both copies could be considered the "same person" as the single original consciousness before it was copied. At the same time, they can be considered distinct individuals once they begin to diverge, so the issue of which copy "inherits" what could be complicated. This problem is similar to that found when considering the possibility of teleportation, where in some proposed methods it is possible to copy (rather than only move) a mind or person. This is the classic philosophical issue of personal identity. The problem is made even more serious by the possibility of creating a potentially infinite number of initially identical copies of the original person, which would of course all exist simultaneously as distinct beings.

Philosopher John Locke published "An Essay Concerning Human Understanding" in 1689, in which he proposed the following criterion for personal identity: if you remember thinking something in the past, then you are the same person as he or she who did the thinking. Later philosophers raised various logical snarls, most of them caused by applying Boolean logic, the prevalent logic system at the time. It has been proposed that modern fuzzy logic can solve those problems,[10] showing that Locke's basic idea is sound if one treats personal identity as a continuous rather than discrete value.

In that case, when a mind is copied -- whether during mind uploading, or afterwards, or by some other means -- the two copies are initially two instances of the very same person, but over time, they will gradually become different people to an increasing degree.

The issue of copying vs moving is sometimes cited as a reason to think that destructive methods of mind uploading such as serial sectioning of the brain would actually destroy the consciousness of the original and the upload would itself be a mere "copy" of that consciousness. Whether one believes that the original consciousness of the brain would transfer to the upload, that the original consciousness would be destroyed, or that this is simply a matter of definition and the question has no single "objectively true" answer, is ultimately a philosophical question that depends on one's views of philosophy of mind.

Because of these philosophical questions about the survival of consciousness, there are some who would feel more comfortable about a method of uploading where the transfer is gradual, replacing the original brain with a new substrate over an extended period of time, during which the subject appears to be fully conscious (this can be seen as analogous to the natural biological replacement of molecules in our brains with new ones taken in from eating and breathing, which may lead to almost all the matter in our brains being replaced in as little as a few months[11]). As mentioned above, this would likely take place as a result of gradual cyborging, either nanoscopically or macroscopically, wherein the brain (the original copy) would slowly be replaced bit by bit with artificial parts that function in a near-identical manner, and assuming this was possible at all, the person would not necessarily notice any difference as more and more of their brain became artificial. A gradual transfer also brings up questions of identity similar to the classical Ship of Theseus paradox, although the above-mentioned natural replacement of molecules in the brain through eating and breathing brings up these questions as well.

A computer capable of simulating a person may require microelectromechanical systems (MEMS), or else perhaps optical or nano computing for comparable speed and reduced size and sophisticated telecommunication between the brain and body (whether it exists in virtual reality, artificially as an android, or cybernetically as in sync with a biological body through a transceiver), but would not seem to require molecular nanotechnology.

If minds and environments can be simulated, the Simulation Hypothesis posits that the reality we see may in fact be a computer simulation, and that this is actually the most likely possibility.[12]

Uploading is a common theme in science fiction. Some of the earlier instances of this theme were in the Roger Zelazny 1968 novel Lord of Light and in Frederik Pohl's 1955 short story "Tunnel Under the World." A near miss was Neil R. Jones' 1931 short story "The Jameson Satellite", wherein a person's organic brain was installed in a machine, and Olaf Stapledon's "Last and First Men" (1930) had organic human-like brains grown into an immobile machine.

Another of the "firsts" is the novel Detta r verkligheten (This is reality), 1968, by the renowned philosopher and logician Bertil Mrtensson, in which he describes people living in an uploaded state as a means to control overpopulation. The uploaded people believe that they are "alive", but in reality they are playing elaborate and advanced fantasy games. In a twist at the end, the author changes everything into one of the best "multiverse" ideas of science fiction. Together with the 1969 book Ubik by Philip K. Dick it takes the subject to its furthest point of all the early novels in the field.

Frederik Pohl's Gateway series (also known as the Heechee Saga) deals with a human being, Robinette Broadhead, who "dies" and, due to the efforts of his wife, a computer scientist, as well as the computer program Sigfrid von Shrink, is uploaded into the "64 Gigabit space" (now archaic, but Fred Pohl wrote Gateway in 1976). The Heechee Saga deals with the physical, social, sexual, recreational, and scientific nature of cyberspace before William Gibson's award-winning Neuromancer, and the interactions between cyberspace and "meatspace" commonly depicted in cyberpunk fiction. In Neuromancer, a hacking tool used by the main character is an artificial infomorph of a notorious cyber-criminal, Dixie Flatline. The infomorph only assists in exchange for the promise that he be deleted after the mission is complete.

In the 1982 novel Software, part of the Ware Tetralogy by Rudy Rucker, one of the main characters, Cobb Anderson, has his mind uploaded and his body replaced with an extremely human-like android body. The robots who persuade Anderson into doing this sell the process to him as a way to become immortal.

In the 1997 novel "Shade's Children" by Garth Nix, one of the main characters Shade (a.k.a. Robert Ingman) is an uploaded consciousness that guides the other characters through the post-apocolyptic world in which they live.

The fiction of Greg Egan has explored many of the philosophical, ethical, legal, and identity aspects of mind uploading, as well as the financial and computing aspects (i.e., hardware, software, processing power) of maintaining "copies". In Egan's Permutation City and Diaspora, "copies" are made by computer simulation of scanned brain physiology. Also, in Egan's "Jewelhead" stories, the mind is transferred from the organic brain to a small, immortal backup computer at the base of the skull, with the organic brain then being surgically removed.

The Takeshi Kovacs novels by Richard Morgan was set in a universe where mind transfers were a part of standard life. With the use of cortical stacks, which record a person's memories and personality into a device implanted in the spinal vertebrae, it was possible to copy the individual's mind to a storage system at the time of death. The stack could be uploaded to a virtual reality environment for interrogation, entertainment, or to pass the time for long distance travel. The stack could also be implanted into a new body or "sleeve" which may or may not have biomechanical, genetic, or chemical "upgrades" since the sleeve could be grown or manufactured. Interstellar travel is most often accomplished by digitized human freight ("dhf") over faster-than-light needlecast transmission.

In the "Requiem for Homo Sapiens" series of novels by David Zindell (Neverness, The Broken God, The Wild, and War in Heaven), the verb "cark" is used for uploading one's mind (and also for changing one's DNA). Carking is done for soul-preservation purposes by the members of the Architects church, and also for more sinister (or simply unknowable) purposes by the various "gods" that populate the galaxy such gods being human minds that have now grown into planet- or nebula-sized synthetic brains. The climax of the series centers around the struggle to prevent one character from creating a Universal Computer (under his control) that will incorporate all human minds (and indeed, the entire structure of the universe).

In the popular computer game Total Annihilation, the 4,000-year war that eventually culminated with the destruction of the Milky Way galaxy was started over the issue of mind transfer, with one group (the Arm) resisting another group (the Core) who were attempting to enforce a 100% conversion rate of humanity into machines, because machines are durable and modular, thereby making it a "public health measure."

In the popular science fiction show Stargate SG-1 the alien race who call themselves the Asgard rely solely on cloning and mind transferring to continue their existence. This was not a choice they made, but a result of the decay of the Asgard genome due to excessive cloning, which also caused the Asgard to lose their ability to reproduce. In the episode "Tin Man", SG-1 encounter Harlan, the last of a race that transferred their minds to robots in order to survive. SG-1 then discover that their minds have also been transferred to robot bodies. Eventually they learn that their minds were copied rather than uploaded and that the "original" SG-1 are still alive.

The Thirteenth Floor is a film made in 1999 directed by Josef Rusnak. In the film, a scientific team discovers a technology to create a fully functioning virtual world which they could experience by taking control of the bodies of simulated characters in the world, all of whom were self-aware. One plot twist was that if the virtual body a person had taken control of was killed in the simulation while they were controlling it, then the mind of the simulated character the body originally belonged to would take over the body of that person in the "real world".

The Matrix is a film released the same year as The Thirteenth Floor that has the same kind of solipsistic philosophy. In The Matrix, the protagonist Neo finds out that the world he has been living in is nothing but a simulated dreamworld. However, this should be considered as virtual reality rather than mind uploading, since Neo's physical brain still is required to reside his mind. The mind (the information content of the brain) is not copied into an emulated brain in a computer. Neo's physical brain is connected into the Matrix via a brain-machine interface. Only the rest of the physical body is simulated. Neo is disconnected from this dreamworld by human rebels fighting against AI-driven machines in what seems to be a neverending war. During the course of the movie, Neo and his friends are connected back into the Matrix dreamworld in order to fight the machine race.

In the series Battlestar Galactica the antagonists of the story are the Cylons, sentient computers created by man which developed to become nearly identical to human beings. When they die they rely on mind transferring to keep on living so that "death becomes a learning experience".

The 1995 movie Strange Days explores the idea of a technology capable of recording a conscious event. However, in this case, the mind itself is not uploaded into the device. The recorded event, which time frame is limited to that of the recording session, is frozen in time on a data disc much like today's audio and video. Wearing the "helmet" in playback mode, another person can experience the external stimuli interpretation of the brain, the memories, the feelings, the thoughts and the actions that the original person recorded from his/her life. During playback, the observer temporarily quits his own memories and state of consciousness (the real self). In other words, one can "live" a moment in the life of another person, and one can "live" the same moment of his/her life more than once. In the movie, a direct link to a remote helmet can also be established, allowing another person to experience a live event.

Followers of the Ralian religion advocate mind uploading in the process of human cloning to achieve eternal life. Living inside of a computer is also seen by followers as an eminent possibility.[13]

However, mind uploading is also advocated by a number of secular researchers in neuroscience and artificial intelligence, such as Marvin Minsky. In 1993, Joe Strout created a small web site called the Mind Uploading Home Page, and began advocating the idea in Cryonics circles and elsewhere on the net. That site has not been actively updated in recent years, but it has spawned other sites including MindUploading.org, run by Randal A. Koene, Ph.D., who also moderates a mailing list on the topic. These advocates see mind uploading as a medical procedure which could eventually save countless lives.

Many Transhumanists look forward to the development and deployment of mind uploading technology, with many predicting that it will become possible within the 21st century due to technological trends such as Moore's Law. Many view it as the end phase of the Transhumanist project, which might be said to begin with the genetic engineering of biological humans, continue with the cybernetic enhancement of genetically engineered humans, and finally obtain with the replacement of all remaining biological aspects.

The book Beyond Humanity: CyberEvolution and Future Minds by Gregory S. Paul & Earl D. Cox, is about the eventual (and, to the authors, almost inevitable) evolution of computers into sentient beings, but also deals with human mind transfer.

Raymond Kurzweil, a prominent advocate of transhumanism and the likelihood of a technological singularity, has suggested that the easiest path to human-level artificial intelligence may lie in "reverse-engineering the human brain", which he usually uses to refer to the creation of a new intelligence based on the general "principles of operation" of the brain, but he also sometimes uses the term to refer to the notion of uploading individual human minds based on highly detailed scans and simulations. This idea is discussed on pp. 198-203 of his book The Singularity is Near, for example.

Hans Moravec describes and advocates mind uploading in both his 1988 book Mind Children: The Future of Robot and Human Intelligence and also his 2000 book Robot: Mere Machine to Transcendent Mind. Moravec is referred to by Marvin Minsky in Minsky's essay Will Robots Inherit the Earth?.[14]

fr:Tlchargement de l'esprit ja: ru:

Read more:

Mind uploading - Transhumanism Wiki - Wikia

astronomy | Britannica.com

Astronomy, science that encompasses the study of all extraterrestrial objects and phenomena. Until the invention of the telescope and the discovery of the laws of motion and gravity in the 17th century, astronomy was primarily concerned with noting and predicting the positions of the Sun, Moon, and planets, originally for calendrical and astrological purposes and later for navigational uses and scientific interest. The catalog of objects now studied is much broader and includes, in order of increasing distance, the solar system, the stars that make up the Milky Way Galaxy, and other, more distant galaxies. With the advent of scientific space probes, Earth also has come to be studied as one of the planets, though its more detailed investigation remains the domain of the geologic sciences.

Since the late 19th century astronomy has expanded to include astrophysics, the application of physical and chemical knowledge to an understanding of the nature of celestial objects and the physical processes that control their formation, evolution, and emission of radiation. In addition, the gases and dust particles around and between the stars have become the subjects of much research. Study of the nuclear reactions that provide the energy radiated by stars has shown how the diversity of atoms found in nature can be derived from a universe that, following the first few minutes of its existence, consisted only of hydrogen, helium, and a trace of lithium. Concerned with phenomena on the largest scale is cosmology, the study of the evolution of the universe. Astrophysics has transformed cosmology from a purely speculative activity to a modern science capable of predictions that can be tested.

Its great advances notwithstanding, astronomy is still subject to a major constraint: it is inherently an observational rather than an experimental science. Almost all measurements must be performed at great distances from the objects of interest, with no control over such quantities as their temperature, pressure, or chemical composition. There are a few exceptions to this limitationnamely, meteorites, rock and soil samples brought back from the Moon, samples of comet dust returned by robotic spacecraft, and interplanetary dust particles collected in or above the stratosphere. These can be examined with laboratory techniques to provide information that cannot be obtained in any other way. In the future, space missions may return surface materials from Mars, asteroids, or other objects, but much of astronomy appears otherwise confined to Earth-based observations augmented by observations from orbiting satellites and long-range space probes and supplemented by theory.

A central undertaking in astronomy is the determination of distances. Without a knowledge of its distance, the size of an observed object in space would remain nothing more than an angular diameter, and the brightness of a star could not be converted into its true radiated power, or luminosity. Astronomical distance measurement began with a knowledge of Earths diameter, which provided a base for triangulation. Within the inner solar system, some distances can now be better determined through the timing of radar reflections or, in the case of the Moon, through laser ranging. For the outer planets, triangulation is still used. Beyond the solar system, distances to the closest stars are determined through triangulation, with the diameter of Earths orbit serving as the baseline and shifts in stellar parallax being the measured quantities. Stellar distances are commonly expressed by astronomers in parsecs (pc), kiloparsecs, or megaparsecs. (1pc=3.0861018 cm, or about 3.26 light-years [1.92 1013 miles].) Distances can be measured out to around a kiloparsec by trigonometric parallax (see star: Determining stellar distances). The accuracy of measurements made from Earths surface is limited by atmospheric effects, but measurements made from the Hipparcos satellite in the 1990s have extended the scale to stars as far as 650 parsecs, with an accuracy of about a thousandth of an arc second. Less-direct measurements must be used for more-distant stars and for galaxies.

Two general methods for determining galactic distances are described here. In the first, a clearly identifiable type of star is used as a reference standard because its luminosity has been well determined. This requires observation of such stars that are close enough to Earth that their distances and luminosities have been reliably measured. Such a star is termed a standard candle. Examples are Cepheid variables, whose brightness varies periodically in well-documented ways, and certain types of supernova explosions that have enormous brilliance and can thus be seen out to very great distances. Once the luminosities of such nearer standard candles have been calibrated, the distance to a farther standard candle can be calculated from its calibrated luminosity and its actual measured intensity. (The measured intensity [I] is related to the luminosity [L] and distance [d] by the formula I=L/4d2). A standard candle can be identified by means of its spectrum or the pattern of regular variations in brightness. (Corrections may have to be made for the absorption of starlight by interstellar gas and dust over great distances.) This method forms the basis of measurements of distances to the closest galaxies.

Test Your Knowledge

Astronomy and Space Quiz

The second method for galactic distance measurements makes use of the observation that the distances to galaxies generally correlate with the speeds with which those galaxies are receding from Earth (as determined from the Doppler shift in the wavelengths of their emitted light). This correlation is expressed in the Hubble law: velocity=Hdistance, in which H denotes Hubbles constant, which must be determined from observations of the rate at which the galaxies are receding. There is widespread agreement that H lies between 70 and 76 kilometres per second per megaparsec (km/sec/Mpc), with leading research groups offering estimates that have an average value of about 71 km/sec/Mpc. H has been used to determine distances to remote galaxies in which standard candles have not been found. (For additional discussion of the recession of galaxies, the Hubble law, and galactic distance determination, see physical science: Astronomy.)

The solar system took shape 4.57 billion years ago, when it condensed within a large cloud of gas and dust. Gravitational attraction holds the planets in their elliptical orbits around the Sun. In addition to Earth, five major planets (Mercury, Venus, Mars, Jupiter, and Saturn) have been known from ancient times. Since then only two more have been discovered: Uranus by accident in 1781 and Neptune in 1846 after a deliberate search following a theoretical prediction based on observed irregularities in the orbit of Uranus. Pluto, discovered in 1930 after a search for a planet predicted to lie beyond Neptune, was considered a major planet until 2006, when it was redesignated a dwarf planet by the International Astronomical Union.

The average Earth-Sun distance, which originally defined the astronomical unit (AU), provides a convenient measure for distances within the solar system. The astronomical unit is now defined dynamically (using Keplers third law; see Keplers laws of planetary motion) and has the value 1.495978706911013 cm (about 93 million miles), with an uncertainty of about 2,000 cm. The mean radius of Earths orbit is 1+(3.1108) AU. Mercury, at 0.4 AU, is the closest planet to the Sun, while Neptune, at 30.1 AU, is the farthest. Plutos orbit, with a mean radius of 39.5, is sufficiently eccentric that at times it is closer to the Sun than is Neptune. The planes of the planetary orbits are all within a few degrees of the ecliptic, the plane that contains Earths orbit around the Sun. As viewed from far above Earths North Pole, all planets move in the same (counterclockwise) direction in their orbits.

All of the planets apart from the two closest to the Sun (Mercury and Venus) have natural satellites (moons) that are very diverse in appearance, size, and structure, as revealed in close-up observations from long-range space probes. Pluto has at least three moons, including one fully half the size of Pluto itself. Four planetsJupiter, Saturn, Uranus, and Neptunehave rings, disklike systems of small rocks and particles that orbit their parent planets.

Britannica Lists & Quizzes

Philosophy & Religion Quiz

Animals List

Science Quiz

Sports & Recreation List

Most of the mass of the solar system is concentrated in the Sun, with its 1.991033 grams. Together, all of the planets amount to 2.71030 grams (i.e., about one-thousandth of the Suns mass), with Jupiter alone accounting for 71 percent of this amount. The solar system also contains a few known objects of intermediate size classified as dwarf planets and a very large number of much smaller objects collectively called small bodies. The small bodies, roughly in order of decreasing size, are the asteroids, or minor planets; comets, including Kuiper belt and Oort cloud objects; meteoroids (see meteor and meteoroid); and interplanetary dust particles. Because of their starlike appearance when discovered, the largest of these bodies were termed asteroids, and that name is widely used, but, now that the rocky nature of these bodies is understood, their more descriptive name is minor planets.

The four inner, terrestrial planetsMercury, Venus, Earth, and Marsalong with the Moon have average densities in the range of 3.95.5 grams per cubic cm, setting them apart from the four outer, giant planetsJupiter, Saturn, Uranus, and Neptunewhose densities are all close to 1 gram per cubic cm, the density of water. The compositions of these two groups of planets must therefore be significantly different. This dissimilarity is thought to be attributable to conditions that prevailed during the early development of the solar system (see below Theories of origin). Planetary temperatures now range from around 170 C (330 F, 440 K) on Mercurys surface through the typical 15 C (60 F, 290 K) on Earth to 135 C (210 F, 140 K) on Jupiter near its cloud tops and down to 210 C (350 F, 60 K) near Neptunes cloud tops. These are average temperatures; large variations exist between dayside and nightside for planets closest to the Sun, except for Venus with its thick atmosphere.

The surfaces of the terrestrial planets and many satellites show extensive cratering, produced by high-speed impacts (see meteorite crater). On Earth, with its large quantities of water and an active atmosphere, many of these cosmic footprints have eroded, but remnants of very large craters can be seen in aerial and spacecraft photographs of the terrestrial surface. On Mercury, Mars, and the Moon, the absence of water and any significant atmosphere has left the craters unchanged for billions of years, apart from disturbances produced by infrequent later impacts. Volcanic activity has been an important force in the shaping of the surfaces of the Moon and the terrestrial planets. Seismic activity on the Moon has been monitored by means of seismometers left on its surface by Apollo astronauts and by Lunokhod robotic rovers. Cratering on the largest scale seems to have ceased about three billion years ago, although on the Moon there is clear evidence for a continued cosmic drizzle of small particles, with the larger objects churning (gardening) the lunar surface and the smallest producing microscopic impact pits in crystals in the lunar rocks.

During the U.S. Apollo missions a total weight of 381.7 kg (841.5 pounds) of lunar material was collected; an additional 300 grams (0.66 pounds) was brought back by unmanned Soviet Luna vehicles. About 15 percent of the Apollo samples have been distributed for analysis, with the remainder stored at the NASA Johnson Space Center, Houston, Texas. The opportunity to employ a wide range of laboratory techniques on these lunar samples has revolutionized planetary science. The results of the analyses have enabled investigators to determine the composition and age of the lunar surface. Seismic observations have made it possible to probe the lunar interior. In addition, retroreflectors left on the Moons surface by Apollo astronauts have allowed high-power laser beams to be sent from Earth to the Moon and back, permitting scientists to monitor the Earth-Moon distance to an accuracy of a few centimetres. This experiment, which has provided data used in calculations of the dynamics of the Earth-Moon system, has shown that the separation of the two bodies is increasing by 4.4 cm (1.7 inches) each year. (For additional information on lunar studies, see Moon.)

Mercury is too hot to retain an atmosphere, but Venuss brilliant white appearance is the result of its being completely enveloped in thick clouds of carbon dioxide, impenetrable at visible wavelengths. Below the upper clouds, Venus has a hostile atmosphere containing clouds of sulfuric acid droplets. The cloud cover shields the planets surface from direct sunlight, but the energy that does filter through warms the surface, which then radiates at infrared wavelengths. The long-wavelength infrared radiation is trapped by the dense clouds such that an efficient greenhouse effect keeps the surface temperature near 465 C (870 F, 740 K). Radar, which can penetrate the thick Venusian clouds, has been used to map the planets surface. In contrast, the atmosphere of Mars is very thin and is composed mostly of carbon dioxide (95 percent), with very little water vapour; the planets surface pressure is only about 0.006 that of Earth. The outer planets have atmospheres composed largely of light gases, mainly hydrogen and helium.

Each planet rotates on its axis, and nearly all of them rotate in the same directioncounterclockwise as viewed from above the ecliptic. The two exceptions are Venus, which rotates in the clockwise direction beneath its cloud cover, and Uranus, which has its rotation axis very nearly in the plane of the ecliptic.

Some of the planets have magnetic fields. Earths field extends outward until it is disturbed by the solar windan outward flow of protons and electrons from the Sunwhich carries a magnetic field along with it. Through processes not yet fully understood, particles from the solar wind and galactic cosmic rays (high-speed particles from outside the solar system) populate two doughnut-shaped regions called the Van Allen radiation belts. The inner belt extends from about 1,000 to 5,000 km (600 to 3,000 miles) above Earths surface, and the outer from roughly 15,000 to 25,000 km (9,300 to 15,500 miles). In these belts, trapped particles spiral along paths that take them around Earth while bouncing back and forth between the Northern and Southern hemispheres, with their orbits controlled by Earths magnetic field. During periods of increased solar activity, these regions of trapped particles are disturbed, and some of the particles move down into Earths atmosphere, where they collide with atoms and molecules to produce auroras.

Jupiter has a magnetic field far stronger than Earths and many more trapped electrons, whose synchrotron radiation (electromagnetic radiation emitted by high-speed charged particles that are forced to move in curved paths, as under the influence of a magnetic field) is detectable from Earth. Bursts of increased radio emission are correlated with the position of Io, the innermost of the four Galilean moons of Jupiter. Saturn has a magnetic field that is much weaker than Jupiters, but it too has a region of trapped particles. Mercury has a weak magnetic field that is only about 1 percent as strong as Earths and shows no evidence of trapped particles. Uranus and Neptune have fields that are less than one-tenth the strength of Saturns and appear much more complex than that of Earth. No field has been detected around Venus or Mars.

More than 200,000 asteroids with well-established orbits are known, and several hundred additional objects are discovered each year. Hundreds of thousands more have been seen, but their orbits have not been as well-determined. It is estimated that several million asteroids exist, but most are small, and their combined mass is estimated to be less than a thousandth that of Earth. Most of the asteroids have orbits close to the ecliptic and move in the asteroid belt, between 2.3 and 3.3 AU from the Sun. Because some asteroids travel in orbits that can bring them close to Earth, there is a possibility of a collision that could have devastating results (see Earth impact hazard).

Comets are considered to come from a vast reservoir, the Oort cloud, orbiting the Sun at distances of 20,00050,000 AU or more and containing trillions of icy objectslatent comet nucleiwith the potential to become active comets. Many comets have been observed over the centuries. Most make only a single pass through the inner solar system, but some are deflected by Jupiter or Saturn into orbits that allow them to return at predictable times. Halleys Comet is the best-known of these periodic comets, with its next return into the inner solar system predicted for 2061 ce. Many short-period comets are thought to come from the Kuiper belt, a region lying mainly between 30 AU and 50 AU from the Sunbeyond Neptunes orbit but including part of Plutosand housing perhaps hundreds of millions of comet nuclei. Comet masses have not been well determined, but most are probably less than 1018 grams, one billionth the mass of Earth.

Since the 1990s more than a thousand comet nuclei in the Kuiper belt have been observed with large telescopes; a few are about half the size of Pluto, and at least one, Eris, is estimated to be slightly larger. Plutos orbital and physical characteristics had long caused it to be regarded as an anomaly among the planets, and, after the discovery of numerous other Pluto-like objects beyond Neptune, Pluto was seen to be no longer unique in its neighbourhood but rather a giant member of the local population. Consequently, in 2006 astronomers at the general assembly of the International Astronomical Union elected to create the new category of dwarf planets for objects with such qualifications. Pluto, Eris, and Ceres, the latter being the largest member of the asteroid belt, were given this distinction. Two other Kuiper belt objects, Makemake and Haumea, were also designated as dwarf planets.

Smaller than the observed asteroids and comets are the meteoroids (see meteor and meteoroid), lumps of stony or metallic material believed to be mostly fragments of asteroids and comets. Meteoroids vary from small rocks to boulders weighing a ton or more. A relative few have orbits that bring them into Earths atmosphere and down to the surface as meteorites. Most if not all meteorites that have been collected on Earth are probably from asteroids.

Meteorites are classified into three broad groups: stony (chondrites and achondrites; about 94 percent), iron (5 percent), and stony-iron (1 percent). Most meteoroids that enter the atmosphere heat up sufficiently to glow and appear as meteors (see meteor and meteoroid), and the great majority of these vaporize completely or break up before they reach the surface. Many, perhaps most, meteors occur in showers (see meteor shower) and follow orbits that seem to be identical with those of certain comets, thus pointing to a cometary origin. For example, each May, when Earth crosses the orbit of Halleys Comet, the Eta Aquarid meteor shower occurs. Micrometeorites (interplanetary dust particles), the smallest meteoroidal particles, can be detected from Earth-orbiting satellites or collected by specially equipped aircraft flying in the stratosphere and returned for laboratory inspection. Since the late 1960s numerous meteorites have been found in the Antarctic on the surface of stranded ice flows (see Antarctic meteorites). Detailed analyses have shown that some of these meteorites have come from the Moon and others from Mars. Yet others contain microscopic crystals whose isotopic proportions are unique and appear to be dust grains that formed in the atmospheres of different stars.

The age of the solar system, taken to be close to 4.6 billion years, has been derived from measurements of radioactivity in meteorites, lunar samples, and Earths crust. Abundances of isotopes of uranium, thorium, and rubidium and their decay products, lead and strontium, are the measured quantities.

Assessment of the chemical composition of the solar system is based on data from Earth, the Moon, and meteorites as well as on the spectral analysis of light from the Sun and planets. In broad outline, the solar system abundances of the chemical elements decrease with increasing atomic weight. Hydrogen atoms are by far the most abundant, constituting 91 percent; helium is next, with 8.9 percent; and all other types of atoms together amount to only 0.1 percent.

The origin of Earth, the Moon, and the solar system as a whole is a problem that has not yet been settled in detail. The Sun probably formed by condensation of the central region of a large cloud of gas and dust, with the planets and other bodies of the solar system forming soon after, their composition strongly influenced by the temperature and pressure gradients in the evolving solar nebula. Less-volatile materials could condense into solids relatively close to the Sun to form the terrestrial planets. The abundant, volatile lighter elements could condense only at much greater distances to form the giant gas planets. After the early 1990s astronomers confirmed that stars other than the Sun have one or more planetlike objects revolving around them. Studies of the properties of these solar systems have both supported and challenged astronomers theoretical models of how Earths solar system formed. (See also solar system: Origin of the solar system.)

The origin of the planetary satellites is not entirely settled. As to the origin of the Moon, the opinion of astronomers had long oscillated between theories that saw its origin and condensation simultaneous with formation of Earth and those that posited a separate origin for the Moon and its later capture by Earths gravitational field. Similarities and differences in abundances of the chemical elements and their isotopes on Earth and Moon had challenged each group of theories. Finally, in the 1980s a model emerged that has gained the support of most lunar scientiststhat of a large impact on Earth with the expulsion of material that subsequently formed the Moon. (See Moon: Origin and evolution.) For the outer planets with their multiple satellites, many very small and quite unlike one another, the picture is less clear. Some of these moons have relatively smooth icy surfaces, whereas others are heavily cratered; at least one, Jupiters Io, is volcanic. Some of the moons may have formed along with their parent planets, and others may have formed elsewhere and been captured.

The measurable quantities in stellar astrophysics include the externally observable features of the stars: distance, temperature, radiation spectrum and luminosity, composition (of the outer layers), diameter, mass, and variability in any of these. Theoretical astrophysicists use these observations to model the structure of stars and to devise theories for their formation and evolution. Positional information can be used for dynamical analysis, which yields estimates of stellar masses.

In a system dating back at least to the Greek astronomer-mathematician Hipparchus in the 2nd century bce, apparent stellar brightness (m) is measured in magnitudes. Magnitudes are now defined such that a first-magnitude star is 100 times brighter than a star of sixth magnitude. The human eye cannot see stars fainter than about sixth magnitude, but modern instruments used with large telescopes can record stars as faint as about 30th magnitude. By convention, the absolute magnitude (M) is defined as the magnitude that a star would appear to have if it were located at a standard distance of 10 parsecs. These quantities are related through the expression mM=5log10r5, in which r is the stars distance in parsecs.

The magnitude scale is anchored on a group of standard stars. An absolute measure of radiant power is luminosity, usually expressed in ergs per second (ergs/sec). (Sometimes the luminosity is stated in terms of the solar luminosity, 3.861033 ergs/sec.) Luminosity can be calculated when m and r are known. Correction might be necessary for the interstellar absorption of starlight.

There are several methods for measuring a stars diameter. From the brightness and distance the luminosity (L) can be calculated, and from observations of the brightness at different wavelengths the temperature (T) can be calculated. Because the radiation from many stars can be well approximated by a Planck blackbody spectrum (see Plancks radiation law), these measured quantities can be related through the expression L=4R2T4, thus providing a means of calculating R, the stars radius. In this expression, is the Stefan-Boltzmann constant, 5.67105ergs/cm2K4sec, in which K is the temperature in kelvins. (The radius R refers to the stars photosphere, the region where the star becomes effectively opaque to outside observation.) Stellar angular diameters can be measured through interference effects. Alternatively, the intensity of the starlight can be monitored during occultation by the Moon, which produces diffraction fringes whose pattern depends on the angular diameter of the star. Stellar angular diameters of several milliarcseconds can be measured, but so far only for relatively bright and close stars.

Many stars occur in binary systems (see binary star), with the two partners in orbits around their mutual centre of mass. Such a system provides the best measurement of stellar masses. The period (P) of a binary system is related to the masses of the two stars (m1 and m2) and the orbital semimajor axis (mean radius; a) via Keplers third law: P2=42a3/G(m1+m2). (G is the universal gravitational constant.) From diameters and masses, average values of the stellar density can be calculated and thence the central pressure. With the assumption of an equation of state, the central temperature can then be calculated. For example, in the Sun the central density is 158 grams per cubic cm; the pressure is calculated to be more than one billion times the pressure of Earths atmosphere at sea level and the temperature around 15 million K (27 million F). At this temperature, all atoms are ionized, and so the solar interior consists of a plasma, an ionized gas with hydrogen nuclei (i.e., protons), helium nuclei, and electrons as major constituents. A small fraction of the hydrogen nuclei possess sufficiently high speeds that, on colliding, their electrostatic repulsion is overcome, resulting in the formation, by means of a set of fusion reactions, of helium nuclei and a release of energy (see proton-proton cycle). Some of this energy is carried away by neutrinos, but most of it is carried by photons to the surface of the Sun to maintain its luminosity.

Other stars, both more and less massive than the Sun, have broadly similar structures, but the size, central pressure and temperature, and fusion rate are functions of the stars mass and composition. The stars and their internal fusion (and resulting luminosity) are held stable against collapse through a delicate balance between the inward pressure produced by gravitational attraction and the outward pressure supplied by the photons produced in the fusion reactions.

Stars that are in this condition of hydrostatic equilibrium are termed main-sequence stars, and they occupy a well-defined band on the Hertzsprung-Russell (H-R) diagram, in which luminosity is plotted against colour index or temperature. Spectral classification, based initially on the colour index, includes the major spectral types O, B, A, F, G, K and M, each subdivided into 10 parts (see star: Stellar spectra). Temperature is deduced from broadband spectral measurements in several standard wavelength intervals. Measurement of apparent magnitudes in two spectral regions, the B and V bands (centred on 4350 and 5550 angstroms, respectively), permits calculation of the colour index, CI=mBmV, from which the temperature can be calculated.

For a given temperature, there are stars that are much more luminous than main-sequence stars. Given the dependence of luminosity on the square of the radius and the fourth power of the temperature (R2T4 of the luminosity expression above), greater luminosity implies larger radius, and such stars are termed giant stars or supergiant stars. Conversely, stars with luminosities much less than those of main-sequence stars of the same temperature must be smaller and are termed white dwarf stars. Surface temperatures of white dwarfs typically range from 10,000 to 12,000 K (18,000 to 21,000 F), and they appear visually as white or blue-white.

The strength of spectral lines of the more abundant elements in a stars atmosphere allows additional subdivisions within a class. Thus, the Sun, a main-sequence star, is classified as G2 V, in which the V denotes main sequence. Betelgeuse, a red giant with a surface temperature about half that of the Sun but with a luminosity of about 10,000 solar units, is classified as M2 Iab. In this classification, the spectral type is M2, and the Iab indicates a giant, well above the main sequence on the H-R diagram.

The range of physically allowable masses for stars is very narrow. If the stars mass is too small, the central temperature will be too low to sustain fusion reactions. The theoretical minimum stellar mass is about 0.08 solar mass. An upper theoretical limit of approximately 100 solar masses has been suggested, but this value is not firmly defined. Stars as massive as this will have luminosities about one million times greater than that of the Sun.

A general model of star formation and evolution has been developed, and the major features seem to be established. A large cloud of gas and dust can contract under its own gravitational attraction if its temperature is sufficiently low. As gravitational energy is released, the contracting central material heats up until a point is reached at which the outward radiation pressure balances the inward gravitational pressure, and contraction ceases. Fusion reactions take over as the stars primary source of energy, and the star is then on the main sequence. The time to pass through these formative stages and onto the main sequence is less than 100 million years for a star with as much mass as the Sun. It takes longer for less massive stars and a much shorter time for those much more massive.

Once a star has reached its main-sequence stage, it evolves relatively slowly, fusing hydrogen nuclei in its core to form helium nuclei. Continued fusion not only releases the energy that is radiated but also results in nucleosynthesis, the production of heavier nuclei.

Stellar evolution has of necessity been followed through computer modeling because the timescales for most stages are generally too extended for measurable changes to be observed, even over a period of many years. One exception is the supernova, the violently explosive finale of certain stars. Different types of supernovas can be distinguished by their spectral lines and by changes in luminosity during and after the outburst. In Type Ia, a white dwarf star attracts matter from its nearby companion; when the white dwarfs mass exceeds about 1.4 solar masses, the star implodes and is completely destroyed. Type II supernovas are not as luminous as Type Ia and are the final evolutionary stage of stars more massive than about eight solar masses.

The nature of the final products of stellar evolution depend on stellar mass. Some stars pass through an unstable stage in which their dimensions, temperature, and luminosity change cyclically over periods of hours or days. These so-called Cepheid variables serve as standard candles for distance measurements (see above Determining astronomical distances). Some stars blow off their outer layers to produce planetary nebulas. The expanding material can be seen glowing in a thin shell as it disperses into the interstellar medium, while the remnant core, initially with a surface temperature as high as 100,000 K (180,000 F), cools to become a white dwarf. The maximum stellar mass that can exist as a white dwarf is about 1.4 solar masses and is known as the Chandrasekhar limit. More-massive stars may end up as either neutron stars or black holes.

The average density of a white dwarf is calculated to exceed one million grams per cubic cm. Further compression is limited by a quantum condition called degeneracy (see degenerate gas), in which only certain energies are allowed for the electrons in the stars interior. Under sufficiently great pressure, the electrons are forced to combine with protons to form neutrons. The resulting neutron star will have a density in the range of 10141015 grams per cubic cm, comparable to the density within atomic nuclei. The behaviour of large masses having nuclear densities is not yet sufficiently understood to be able to set a limit on the maximum size of a neutron star, but it is thought to be in the region of three solar masses.

Still more-massive remnants of stellar evolution would have smaller dimensions and would be even denser that neutron stars. Such remnants are conceived to be black holes, objects so compact that no radiation can escape from within a characteristic distance called the Schwarzschild radius (see gravitational radius). This critical dimension is defined by Rs=2GM/c2. (Rs is the Schwarzschild radius, G is the gravitational constant, M is the objects mass, and c is the speed of light.) For an object of three solar masses, the Schwarzschild radius would be about three kilometres. Radiation emitted from beyond the Schwarzschild radius can still escape and be detected.

Although no light can be detected coming from within a black hole, the presence of a black hole may be manifested through the effects of its gravitational field, as, for example, in a binary star system. If a black hole is paired with a normal visible star, it may pull matter from its companion toward itself. This matter is accelerated as it approaches the black hole and becomes so intensely heated that it radiates large amounts of X-rays from the periphery of the black hole before reaching the Schwarzschild radius. A few candidates for stellar black holes have been founde.g., the X-ray source Cygnus X-1. Each of them has an estimated mass clearly exceeding that allowable for a neutron star, a factor crucial in the identification of possible black holes. (Supermassive black holes that do not originate as individual stars are thought to exist at the centres of active galaxies; see below Study of other galaxies and related phenomena.)

Whereas the existence of stellar black holes has been strongly indicated, the existence of neutron stars was confirmed in 1968 when they were identified with the then newly discovered pulsars, objects characterized by the emission of radiation at short and extremely regular intervals, generally between 1 and 1,000 pulses per second and stable to better than a part per billion. Pulsars are considered to be rotating neutron stars, remnants of some supernovas.

Stars are not distributed randomly throughout space. Many stars are in systems consisting of two or three members separated by less than 1,000 AU. On a larger scale, star clusters may contain many thousands of stars. Galaxies are much larger systems of stars and usually include clouds of gas and dust.

The solar system is located within the Milky Way Galaxy, close to its equatorial plane and about 7.9 kiloparsecs from the galactic centre. The galactic diameter is about 30 kiloparsecs, as indicated by luminous matter. There is evidence, however, for nonluminous matterso-called dark matterextending out nearly twice this distance. The entire system is rotating such that, at the position of the Sun, the orbital speed is about 220 km per second (almost 500,000 miles per hour) and a complete circuit takes roughly 240 million years. Application of Keplers third law leads to an estimate for the galactic mass of about 100 billion solar masses. The rotational velocity can be measured from the Doppler shifts (see Doppler effect) observed in the 21-cm emission line of neutral hydrogen and the lines of millimetre wavelengths from various molecules, especially carbon monoxide. At great distances from the galactic centre, the rotational velocity does not drop off as expected but rather increases slightly. This behaviour appears to require a much larger galactic mass than can be accounted for by the known (luminous) matter. Additional evidence for the presence of dark matter comes from a variety of other observations. The nature and extent of the dark matter (or missing mass) constitutes one of todays major astronomical puzzles.

There are about 100 billion stars in the Milky Way Galaxy. Star concentrations within the galaxy fall into three types: open clusters, globular clusters, and associations (see star cluster). Open clusters lie primarily in the disk of the galaxy; most contain between 50 and 1,000 stars within a region no more than 10 parsecs in diameter. Stellar associations tend to have somewhat fewer stars; moreover, the constituent stars are not as closely grouped as those in the clusters and are for the most part hotter. Globular clusters, which are widely scattered around the galaxy, may extend up to about 100 parsecs in diameter and may have as many as a million stars. The importance to astronomers of globular clusters lies in their use as indicators of the age of the galaxy. Because massive stars evolve more rapidly than do smaller stars, the age of a cluster can be estimated from its H-R diagram. In a young cluster the main sequence will be well-populated, but in an old cluster the heavier stars will have evolved away from the main sequence. The extent of the depopulation of the main sequence provides an index of age. In this way, the oldest globular clusters have been found to be about 14 billion 1 billion years old, which should therefore be the minimum age for the galaxy.

The interstellar medium, composed primarily of gas and dust, occupies the regions between the stars. On average, it contains less than one atom in each cubic centimetre, with about 1 percent of its mass in the form of minute dust grains. The gas, mostly hydrogen, has been mapped by means of its 21-cm emission line. The gas also contains numerous molecules. Some of these have been detected by the visible-wavelength absorption lines that they impose on the spectra of more-distant stars, while others have been identified by their own emission lines at millimetre wavelengths. Many of the interstellar molecules are found in giant molecular clouds, wherein complex organic molecules have been discovered.

In the vicinity of a very hot O- or B-type star, the intensity of ultraviolet radiation is sufficiently high to ionize the surrounding hydrogen out to a distance as great as 100 parsecs to produce an H II region, known as a Strmgren sphere. Such regions are strong and characteristic emitters of radiation at radio wavelengths, and their dimensions are well calibrated in terms of the luminosity of the central star. Using radio interferometers, astronomers are able to measure the angular diameters of H II regions even in some external galaxies and can thereby deduce the great distances to those remote systems. This method can be used for distances up to about 30 megaparsecs. (For additional information on H II regions, see nebula: Diffuse nebulae (H II regions).)

Interstellar dust grains (see nebula: Interstellar dust) scatter and absorb starlight, with the effect being roughly inversely proportional to wavelength from the infrared to the near ultraviolet. As a result, stellar spectra tend to be reddened. Absorption amounts typically to about one magnitude per kiloparsec but varies considerably in different directions. Some dusty regions contain silicate materials, identified by a broad absorption feature around a wavelength of 10 m. Other prominent spectral features in the infrared range have been sometimes, but not conclusively, attributed to graphite grains and polycyclic aromatic hydrocarbons.

Starlight often shows a small degree of polarization (a few percent), with the effect increasing with stellar distance. This is attributed to the scattering of the starlight from dust grains that have been partially aligned in a weak interstellar magnetic field. The strength of this field is estimated to be a few microgauss, very close to the strength inferred from observations of nonthermal cosmic radio noise. This radio background has been identified as synchrotron radiation, emitted by cosmic-ray electrons traveling at nearly the speed of light and moving along curved paths in the interstellar magnetic field. The spectrum of the cosmic radio noise is close to what is calculated on the basis of measurements of the cosmic rays near Earth.

Cosmic rays constitute another component of the interstellar medium. Cosmic rays that are detected in the vicinity of Earth comprise high-speed nuclei and electrons. Individual particle energies, expressed in electron volts (eV; 1 eV=1.61012 erg), range with decreasing numbers from about 106 eV to more than 1020 eV. Among the nuclei, hydrogen nuclei are the most plentiful at 86 percent, helium nuclei next at 13 percent, and all other nuclei together at about 1 percent. Electrons are about 2 percent as abundant as the nuclear component. (The relative numbers of different nuclei vary somewhat with kinetic energy, while the electron proportion is strongly energy-dependent.)

A minority of cosmic rays detected in Earths vicinity are produced in the Sun, especially at times of increased solar activity (as indicated by sunspots and solar flares). The origin of galactic cosmic rays has not yet been conclusively identified, but they are thought to be produced in stellar processes such as supernova explosions, perhaps with additional acceleration occurring in the interstellar regions. (For additional information on interstellar matter, see Milky Way Galaxy: The general interstellar medium.)

The central region of the Milky Way Galaxy is so heavily obscured by dust that direct observation has become possible only with the development of astronomy at nonvisual wavelengthsnamely, radio, infrared, and, more recently, X-ray and gamma-ray wavelengths. Together, these observations have revealed a nuclear region of intense activity, with a large number of separate sources of emission and a great deal of dust. Detection of gamma-ray emission at a line energy of 511,000 eV, which corresponds to the annihilation of electrons and positrons (the antimatter counterpart of electrons), along with radio mapping of a region no more than 20 AU across, points to a very compact and energetic source, designated Sagittarius A*, at the centre of the galaxy (see Sagittarius A). Sagittarius A* is a supermassive black hole with a mass equivalent to 4,310,000 Suns.

Galaxies are normally classified into three principal types according to their appearance: spiral, elliptical, and irregular. Galactic diameters are typically in the tens of kiloparsecs and the distances between galaxies typically in megaparsecs.

Spiral galaxiesof which the Milky Way system is a characteristic exampletend to be flattened, roughly circular systems with their constituent stars strongly concentrated along spiral arms. These arms are thought to be produced by traveling density waves, which compress and expand the galactic material. Between the spiral arms exists a diffuse interstellar medium of gas and dust, mostly at very low temperatures (below 100 K [280 F, 170 C]). Spiral galaxies are typically a few kiloparsecs in thickness; they have a central bulge and taper gradually toward the outer edges.

Ellipticals show none of the spiral features but are more densely packed stellar systems. They range in shape from nearly spherical to very flattened and contain little interstellar matter. Irregular galaxies number only a few percent of all stellar systems and exhibit none of the regular features associated with spirals or ellipticals.

Properties vary considerably among the different types of galaxies. Spirals typically have masses in the range of a billion to a trillion solar masses, with ellipticals having values from 10 times smaller to 10 times larger and the irregulars generally 10100 times smaller. Visual galactic luminosities show similar spreads among the three types, but the irregulars tend to be less luminous. In contrast, at radio wavelengths the maximum luminosity for spirals is usually 100,000 times less than for ellipticals or irregulars.

Quasars are objects whose spectra display very large redshifts, thus implying (in accordance with the Hubble law) that they lie at the greatest distances (see above Determining astronomical distances). They were discovered in 1963 but remained enigmatic for many years. They appear as starlike (i.e., very compact) sources of radio waveshence their initial designation as quasi-stellar radio sources, a term later shortened to quasars. They are now considered to be the exceedingly luminous cores of distant galaxies. These energetic cores, which emit copious quantities of X-rays and gamma rays, are termed active galactic nuclei and include the object Cygnus A and the nuclei of a class of galaxies called Seyfert galaxies. They may be powered by the infall of matter into supermassive black holes.

The Milky Way Galaxy is one of the Local Group of galaxies, which contains more than three dozen members and extends over a volume about one megaparsec in diameter. Two of the closest members are the Magellanic Clouds, irregular galaxies about 50 kiloparsecs away. At about 740 kiloparsecs the Andromeda Galaxy is one of the most distant in the Local Group. Some members of the group are moving toward the Milky Way system, while others are traveling away from it. At greater distances all galaxies are moving away from the Milky Way Galaxy. Their speeds (as determined from the redshifted wavelengths in their spectra) are generally proportional to their distances. The Hubble law relates these two quantities (see above Determining astronomical distances). In the absence of any other method, the Hubble law continues to be used for distance determinations to the farthest objectsthat is, galaxies and quasars for which redshifts can be measured.

Cosmology is the scientific study of the universe as a unified whole, from its earliest moments through its evolution to its ultimate fate. The currently accepted cosmological model is the big bang. In this picture, the expansion of the universe started in an intense explosion 13.8 billion years ago. In this primordial fireball, the temperature exceeded one trillion K, and most of the energy was in the form of radiation. As the expansion proceeded (accompanied by cooling), the role of the radiation diminished, and other physical processes dominated in turn. Thus, after about three minutes, the temperature had dropped to the one-billion-K range, making it possible for nuclear reactions of protons to take place and produce nuclei of deuterium and helium. (At the higher temperatures that prevailed earlier, these nuclei would have been promptly disrupted by high-energy photons.) With further expansion, the time between nuclear collisions had increased and the proportion of deuterium and helium nuclei had stabilized. After a few hundred thousand years, the temperature must have dropped sufficiently for electrons to remain attached to nuclei to constitute atoms. Galaxies are thought to have begun forming after a few million years, but this stage is very poorly understood. Star formation probably started much later, after at least a billion years, and the process continues today.

Observational support for this general model comes from several independent directions. The expansion has been documented by the redshifts observed in the spectra of galaxies. Furthermore, the radiation left over from the original fireball would have cooled with the expansion. Confirmation of this relic energy came in 1965 with one of the most striking cosmic discoveries of the 20th centurythe observation, at short radio wavelengths, of a widespread cosmic radiation corresponding to a temperature of almost 3 K (about 454 F or 270 C). The shape of the observed spectrum is an excellent fit to the theoretical Planck blackbody spectrum. (The present best value for this temperature is 2.735 K, but it is still called three-degree radiation or the cosmic microwave background.) The spectrum of this cosmic radio noise peaks at approximately one-millimetre wavelength, which is in the far infrared, a difficult region to observe from Earth; however, the spectrum has been well mapped by the Cosmic Background Explorer (COBE) and the Wilkinson Microwave Anisotropy Probe satellites. Additional support for the big bang theory comes from the observed cosmic abundances of deuterium and helium. Normal stellar nucleosynthesis cannot produce their measured quantities, which fit well with calculations of production during the early stages of the big bang.

Early surveys of the cosmic background radiation indicated that it is extremely uniform in all directions (isotropic). Calculations have shown that it is difficult to achieve this degree of isotropy unless there was a very early and rapid inflationary period before the expansion settled into its present mode. Nevertheless, the isotropy posed problems for models of galaxy formation. Galaxies originate from turbulent conditions that produce local fluctuations of density, toward which more matter would then be gravitationally attracted. Such density variations were difficult to reconcile with the isotropy required by observations of the 3 K radiation. This problem was solved when the COBE satellite was able to detect the minute fluctuations in the cosmic background from which the galaxies formed.

The very earliest stages of the big bang are less well understood. The conditions of temperature and pressure that prevailed prior to the first microsecond require the introduction of theoretical ideas of subatomic particle physics. Subatomic particles are usually studied in laboratories with giant accelerators, but the region of particle energies of potential significance to the question at hand lies beyond the range of accelerators currently available. Fortunately, some important conclusions can be drawn from the observed cosmic helium abundance, which is dependent on conditions in the early big bang. The observed helium abundance sets a limit on the number of families of certain types of subatomic particles that can exist.

The age of the universe can be calculated in several ways. Assuming the validity of the big bang model, one attempts to answer the question: How long has the universe been expanding in order to have reached its present size? The numbers relevant to calculating an answer are Hubbles constant (i.e., the current expansion rate), the density of matter in the universe, and the cosmological constant, which allows for change in the expansion rate. In 2003 a calculation based on a fresh determination of Hubbles constant yielded an age of 13.7billion 200 million years, although the precise value depends on certain assumed details of the model used. Independent estimates of stellar ages have yielded values less than this, as would be expected, but other estimates, based on supernova distance measurements, have arrived at values of about 15 billion years, still consistent, within the errors. In the big bang model the age is proportional to the reciprocal of Hubbles constant, hence the importance of determining H as reliably as possible. For example, a value for H of 100 km/sec/Mpc would lead to an age less than that of many stars, a physically unacceptable result.

A small minority of astronomers have developed alternative cosmological theories that are seriously pursued. The overwhelming professional opinion, however, continues to support the big bang model.

Finally, there is the question of the future behaviour of the universe: Is it open? That is to say, will the expansion continue indefinitely? Or is it closed, such that the expansion will slow down and eventually reverse, resulting in contraction? (The final collapse of such a contracting universe is sometimes termed the big crunch.) The density of the universe seems to be at the critical density; that is, the universe is neither open nor closed but flat. So-called dark energy, a kind of repulsive force that is now believed to be a major component of the universe, appears to be the decisive factor in predictions of the long-term fate of the cosmos. If this energy is a cosmological constant (as proposed in 1917 by Albert Einstein to correct certain problems in his model of the universe), then the result would be a big chill. In this scenario, the universe would continue to expand, but its density would decrease. While old stars would burn out, new stars would no longer form. The universe would become cold and dark. The dark (nonluminous) matter component of the universe, whose composition remains unknown, is not considered sufficient to close the universe and cause it to collapse; it now appears to contribute only a fourth of the density needed for closure.

An additional factor in deciding the fate of the universe might be the mass of neutrinos. For decades the neutrino had been postulated to have zero mass, although there was no compelling theoretical reason for this to be so. From the observation of neutrinos generated in the Sun and other celestial sources such as supernovas, in cosmic-ray interactions with Earths atmosphere, and in particle accelerators, investigators have concluded that neutrinos have some mass, though only an extremely small fraction of the mass of an electron. Although there are vast numbers of neutrinos in the universe, the sum of such small neutrino masses appears insufficient to close the universe.

Original post:

astronomy | Britannica.com

Jackboot – Wikipedia

A jackboot is a military boot such as the cavalry jackboot or the hobnailed jackboot. The cavalry jackboot was a version of the jackboots worn by postilions, such as guided the French stage coach or diligence, as described by an English visitor to France in 1803:

The near horse of the three first, is mounted by the postilion, in his great jack boots.... These curious protectors of his legs, are composed of wood, and iron hoops, softened within by stuffing, and give him all the dignity of riding in a pair of upright portmanteaus.[1]

The hobnailed jackboot has a different design and function than the first type. It is a combat boot that is designed for marching. It rises to mid-calf or higher with no laces and usually has a leather sole with hobnails. These boots have both been associated with totalitarianism, as they were worn by the Nazis and were used by armies in the former Soviet Union.

The term originally denoted tall winged leather cavalry boots, which had been "jacked", or reinforced against sword blows by use of mail (armor) sewn into the lining of the leather.[2] The wings on these high boots particularly protected a rider's knee-joint from a sword blow. These boots are still worn and still so termed by the Household Cavalry Regiment of the British Army, founded in the 17th century. The term originates from the French word Jaque (m) meaning mail. The term is of Catalan origin, descended from the Arabic schakk.[3] These boots were made very heavy by the mail reinforcement, and are slightly less so today from the use of modern materials as stiffeners. There are few manufacturers of Cavalry Jackboots extant in the 21st century, the most famous being Schnieder Boots[4] (pronounced Schneeder) of Mayfair, London, the official supplier to Her Majesty the Queen's Household Cavalry.

The second meaning of the term is derived from the first, with reference to their toughness, but is unrelated in design and function, being a combat boot designed for marching, rising to at least mid-calf, with no laces, typically a leather sole with hobnails, and heel irons.[5][6] The Germans call this boot "Marschstiefel", meaning "marching boot". This is the classic boot used by the German Infantry in World War I, though the Stormtroopers dispensed with them in favor of laced boots then used by Austro-Hungarian mountain troops.[7] An etymological source not derived from the Cavalry Jackboot has been suggested as from the word jack, jacket or jerkin, as a common garment worn by the peasantry.[8]

Although hobnailed short jackboots date from before the Napoleonic era, they became popular with the Germanic armies in the mid to late 19th century because of their perceived durability over "lesser" boots. Worn out boots were considered a major problem for armies on the march and the high quality leather "jackboot" with its hobnails was deemed to be more durable than the alternatives available. As Prussia and the associated German minor powers relied on quickly defeating its opponents before they could fully mobilize and coordinate, their infantry's ability to march long distances was a major issue. The jackboot was replaced by lesser quality ankle boots in the German army when leather became scarce in World War II.

The boots are connected to fascism, particularly Nazism, as they were issued by the Wehrmacht and SS as part of the World War II German uniform before Germany encountered leather shortages. When goose-stepping on pavement, the large columns of German soldiers in Marschstiefel ("marching boots") created a distinct rock-crushing sound which came to symbolize German conquest and occupation. A similar style of boot had been in use with German armies in World War I, the Franco-Prussian War, and before.

Jackboots were also associated with the armies of the former USSR (called sapogi) and East Germany. Jackboots are still a part of the modern parade and service attire of the army of Russia and several other former Soviet states.

The word is commonly used in English as a synonym for totalitarianism, particularly fascism, although jackboots and similar types of footwear have been worn by various British regiments since the 18th century (see Wellington Boot, origins). Following the 1982 invasion of the Falkland Islands, British Prime Minister Margaret Thatcher declared that the democratic rights of the Falkland Islanders had been assaulted, and would not surrender the islands to the Argentine "jackboot."

In the United States in October 1993, the National Rifle Association (NRA) ran a 4-page ad in the center of its American Rifleman magazine, the first page of which showed goose-stepping, jackbooted legs under the question, "What's the First Step to a Police State?"[9] Two years later, the NRA's executive vice-president, Wayne LaPierre, sparked controversy when he referred to federal agents as "jackbooted government thugs" in an NRA fund-raising letter. Such statements prompted former U.S. president George H.W. Bush to resign his membership in the organization soon after.[10][11]

The Russian expression " " "under one's boot" translates as "under one's heel" and symbolizes oppression. The Spanish expression "tener (algo o alguien) bajo la bota"[citation needed] or "to have (something or somebody) under the boot" has the same meaning.

Read more from the original source:

Jackboot - Wikipedia

Patriots For Economic Freedom

America is at a tipping point. For far too long, politicians have kicked the can down the road without regard for future generations. Our country can no longer afford such reckless leadership. Today, America is over 15.6 trillion dollars in debt with deficits as far as the eye can see. Taxes are going up, the dollar is losing value and unemployment continues to worsen. All of this is happening while politicians in Washington continue to recklessly spend taxpayer dollars. As Patriots, we have a duty to stop the dangerous politics as usual!

When the dollar loses its status as the world's reserve currency, will you get involved? When interest rates soar and inflation is running rampant, will you get involved? When taxes are raised to the sky high rates of Europe to fund the entitlement crisis, will you get involved? Or maybe you will get involved when unemployment is worse than anytime in history?

There is still a chance to restore liberty and freedom in America. By sending principled fiscal conservatives to Washington, we can change policy. Together, we can defeat the problematic politicians that violate their Constitutional obligations and grow government. With a grassroots army and a message that resonates with mainstream Americans, Patriots for Economic Freedom can force politicians to listen.

No longer will politicians carelessly cave into special interests without fearing repercussions. Citizens are uniting and becoming a potent lobbying force. While big labor, Wall Street and other special interests have dominated the debate for years, Patriots for Economic Freedom serves as the "citizen lobbyist" for mainstream Americans fed up with out of control spending. We may not have billions of dollars on our side but we do have a powerful army of people. Together, our presence is stronger than any lobbyist or special interest. We can do this! We can take our country back!

Read the original post:

Patriots For Economic Freedom

The Principality of Sealand – Become a Lord, Lady, Baron or …

Located in international waters, on the military fortress island of Roughs Tower, Sealand is the smallest country in the world. The countrys national motto is "From the Sea, Freedom" (E Mare Libertas), reflecting its enduring struggle for liberty through the years. Sealand has been an independent sovereign State since 1967. The Bates family governs the small State as hereditary royal rulers, each member with his, or her, own royal title. Sealand upholds its own constitution, composed of a preamble and seven articles. Upon the declaration of independence, the founding Bates family raised the Sealand flag, pledging freedom and justice to all that lived under it. Following this, Sealand issued passports to its nationals, minted official currency and commissioned its own stamps.

Support can be shown for Sealand by purchasing Noble Titles and becoming a Lord or a Lady. Sealand also sells ID cards, and a piece of land in the Principality to help sustain its independence for the years to come. Other official Sealand products are also available from our online store.See shop

Read the original post:

The Principality of Sealand - Become a Lord, Lady, Baron or ...

Balvenie: Magical Moments at Minerva Reef.. November 2016

09 19 November 2016: North Minerva Reef ~ 23 37S 178 54W

Our Passage South from Tonga

There was a mass exodus from Big Mamas anchorage off Pangaimotu Island, Tongatapu on this partly cloudy Wednesday morning in November. Several of us had gathered at Big Mamas the previous evening for the last supper (whoops! we were an hour late as we hadnt changed our clocks to Tongan Summer time, didnt seem worth it for 2 days)

The consensus was unchanged Wednesday and Thursday were the best days to sail to Minerva Reef, 270 miles south. The winds would be out of the south-south-east but light, the swell under a metre, the skies partly cloudy, the moon waxing in the final quarter- ah perfect!

When we got up at 7am the first 3 boats had already left and we could see them slipping out of the pass to the east. A couple more left soon after, they exited via the north pass. When we left at 9.30am we had Randivag in front of us and Windance III behind us, we all went out the western pass. Funny how we all have different tactics to get to the same place! 3 more left in the afternoon, the mass exodus was underway.

Day One was somewhat more lively than expected, funny that, we really should know better by now. The winds were 15 18 knots in front of the beam so we sailed as close to the wind as we could without becoming a submarine, the waves crashed over the bow frequently ~ on a positive note the teak deck got a very thorough water blasting, but the clean stainless steel got thoroughly covered in salt yet again!

Day Two conditions were far more favourable, the wind eased to around 12 knots, much more comfortable and lovely sailing on the wind.

North Minerva Gets Invaded

Just after dawn on Day Three we were amongst the leaders in the procession of yachts arriving, not just the 12 we knew about but more floated in directly from Vavau and the Haapai, it was party time in this very remote paradise. The clouds parted, and daylight exposed this mid ocean masterpiece. North Minerva Reef is like a donut with a little piece nibbled out of the west side to allow entry into the inside ring. You can anchor almost anywhere in here but we all headed up to the Northern end for the best protection for the next few days.

Boats just kept arriving, we peaked at 26, one of the busiest anchorages we had been in for a while. The promised weather window to migrate south was still developing and no one wanted to miss out !! Meanwhile the weather was perfect here while we listened to the reports of gales buffeting northern New Zealand and temperatures of 10c in our homeland. No one was in a hurry to leave this last slice of the tropics!

The Water Has Got Cold!

We dinghied in company with Confidence and Gypsy Heart to the reef entry to snorkel the pass. Definitely something to do in company as you dont want to break down out here alone with the closest land 270 miles away! Jumping overboard took our breath away, the water temperature felt freezing initially but it wasnt so bad once we adjusted to it. We saw live colourful coral, thousands of Sergent-Majors, several white tipped sharks, a brown puffer fish (with a happy looking face on top if you look at the photo again) and several dinner sized fish down in the depths.

One afternoon there was a buzz of activity as we were overflown by the New Zealand Air Force Orion. VHF Channel 16 burst into (official) life as we were all asked to provide our boat names for them. They circled a couple of times, were very friendly and professional, wished us all a safe sail then flew off into the sun. It was reassuring to know we were being watched!

Pizza Delivery in Paradise

The days passed by, a couple of boats left but were replaced by late runners from Tonga. There were 7 boats with children onboard so there was a holiday atmosphere as endless activities were planned to keep them all amused. Michelle on Jade risked total chaos in her galley when she had 8 children making pizza dough one afternoon. Early the next evening Pizza on the Reef delivered piping hot pizzas to the yachts that had pre-ordered, unfortunately we had moved anchorage so missed out. All proceeds were donated to a Kiwi Sanctuary in Whangarei, well done to all the budding pizza chefs!

The snorkelling inside the reef edge was very good and walks on the reef were popular at low tide, especially on the eastern and southern reefs which dried completely. The reef was vast, about 400 metres deep and in places flat and even enough to run along or even ride a bike ~ no we didnt take our bikes ashore!

On the seaward side there were hundreds of indentations along the edge, full of hidey holes for dinner sized fish and lobsters. Those with spear guns would catch enough to feed everyone in a matter of minutes, and were happy to share them around. We had a very good diet of fresh fish and lobster during our stay.

We moved around the inside of the reef as the winds changed direction and ended up enjoying 3 anchorages, it was surprising how different the reef was at low tide in the various spots, great to have time to see it all. We even found the sand cay inside the southern curve, you had to be quick though, it only dried for about 2 hours each low tide.

Is It Really Time To Go?

The promised weather window of a big slow moving high continued to develop although shortened slightly by a mild low that was to follow.

The slower boats in the fleet started to eye up a departure a day before the rest of us so they could arrive into Opua in New Zealands Bay of Islands before the low, this meant however that they would leave Minerva and beat into a 20 knot souwester and 3 metre swell for the first day, the remnants of the big low we were waiting to pass ~ yuk. One boat left and soon after there was a steady trickle heading for the pass. Half the fleet did go and reported a bouncy first night and little gain of their distance to Opua. The rest of us enjoyed another peaceful and calm night in our remote Pacific paradise, the last night at anchor on our amazing voyage ~ what a spot to end it all.

All good things do have to come to an end, this was a major ending for us and 3 other kiwi boats though, we were all on the last leg of our circumnavigation of this huge planet.

Next morning we completed our final preparations for our passage home and lifted anchor at 7.30am. We were the second yacht to exit the pass out of North Minerva that morning, by 11.30am the last had left, peace returned to this outstanding tiny speck in the South Pacific.

There Is Nowhere Else To Stop We Are Going Home

Read this article:

Balvenie: Magical Moments at Minerva Reef.. November 2016

Utopia (book) – Wikipedia

Utopia (Libellus vere aureus, nec minus salutaris quam festivus, de optimo rei publicae statu deque nova insula Utopia) is a work of fiction and political philosophy by Thomas More (14781535) published in 1516 in Latin. The book is a frame narrative primarily depicting a fictional island society and its religious, social and political customs. Many aspects of More's description of Utopia are reminiscent of life in monasteries.[1]

The title De optimo rei publicae deque nova insula Utopia literally translates, "Of a republic's best state and of the new island Utopia". It is variously rendered On the Best State of a Republic and on the New Island of Utopia, Concerning the Highest State of the Republic and the New Island Utopia, On the Best State of a Commonwealth and on the New Island of Utopia, Concerning the Best Condition of the Commonwealth and the New Island of Utopia, On the Best Kind of a Republic and About the New Island of Utopia, About the Best State of a Commonwealth and the New Island of Utopia, etc. The original name was even longer: Libellus vere aureus, nec minus salutaris quam festivus, de optimo rei publicae statu deque nova insula Utopia. This translates, "A truly golden little book, no less beneficial than entertaining, of a republic's best state and of the new island Utopia".

"Utopia" is derived from the Greek prefix "ou-" (), meaning "not", and topos (), "place", with the suffix -i (-) that is typical of toponyms; hence the name literally means "nowhere", emphasizing its fictionality. In early modern English, Utopia was spelled "Utopie", which is today rendered Utopy in some editions.[2]

A common misunderstanding has that "Utopia" is derived from eu- (e), "good", and "topos", such that it would literally translate as "good place".[3]

In English, Utopia is pronounced exactly as Eutopia (the latter word, in Greek [Eutopi], meaning good place, contains the prefix - [eu-], "good", with which the of Utopia has come to be confused in the French and English pronunciation).[4] This is something that More himself addresses in an addendum to his book Wherfore not Utopie, but rather rightely my name is Eutopie, a place of felicitie.[5]

One interpretation holds that this suggests that while Utopia might be some sort of perfected society, it is ultimately unreachable (see below).

The work begins with written correspondence between Thomas More and several people he had met on the continent: Peter Gilles, town clerk of Antwerp, and Hieronymus van Busleyden, counselor to Charles V. More chose these letters, which are communications between actual people, to further the plausibility of his fictional land. In the same spirit, these letters also include a specimen of the Utopian alphabet and its poetry. The letters also explain the lack of widespread travel to Utopia; during the first mention of the land, someone had coughed during announcement of the exact longitude and latitude. The first book tells of the traveller Raphael Hythlodaeus, to whom More is introduced in Antwerp, and it also explores the subject of how best to counsel a prince, a popular topic at the time.

The first discussions with Raphael allow him to discuss some of the modern ills affecting Europe such as the tendency of kings to start wars and the subsequent loss of money on fruitless endeavours. He also criticises the use of execution to punish theft, saying thieves might as well murder whom they rob, to remove witnesses, if the punishment is going to be the same. He lays most of the problems of theft on the practice of enclosurethe enclosing of common landand the subsequent poverty and starvation of people who are denied access to land because of sheep farming.

More tries to convince Raphael that he could find a good job in a royal court, advising monarchs, but Raphael says that his views are too radical and wouldn't be listened to. Raphael sees himself in the tradition of Plato: he knows that for good governance, kings must act philosophically. He, however, points out that:

More seems to contemplate the duty of philosophers to work around and in real situations and, for the sake of political expediency, work within flawed systems to make them better, rather than hoping to start again from first principles.

Utopia is placed in the New World and More links Raphael's travels in with Amerigo Vespucci's real life voyages of discovery. He suggests that Raphael is one of the 24 men Vespucci, in his Four Voyages of 1507, says he left for six months at Cabo Frio, Brazil. Raphael then travels further and finds the island of Utopia, where he spends five years observing the customs of the natives.

According to More, the island of Utopia is

The island was originally a peninsula but a 15-mile wide channel was dug by the community's founder King Utopos to separate it from the mainland. The island contains 54 cities. Each city is divided into four equal parts. The capital city, Amaurot, is located directly in the middle of the crescent island.

Each city has 6000 households, consisting of between 10 and 16 adults. Thirty households are grouped together and elect a Syphograntus (whom More says is now called a phylarchus). Every ten Syphogranti have an elected Traniborus (more recently called a protophylarchus) ruling over them. The 200 Syphogranti of a city elect a Prince in a secret ballot. The Prince stays for life unless he is deposed or removed for suspicion of tyranny.

People are re-distributed around the households and towns to keep numbers even. If the island suffers from overpopulation, colonies are set up on the mainland. Alternatively, the natives of the mainland are invited to be part of these Utopian colonies, but if they dislike it and no longer wish to stay they may return. In the case of underpopulation the colonists are re-called.

There is no private property on Utopia, with goods being stored in warehouses and people requesting what they need. There are also no locks on the doors of the houses, which are rotated between the citizens every ten years. Agriculture is the most important job on the island. Every person is taught it and must live in the countryside, farming for two years at a time, with women doing the same work as men. Parallel to this, every citizen must learn at least one of the other essential trades: weaving (mainly done by the women), carpentry, metalsmithing and masonry. There is deliberate simplicity about these trades; for instance, all people wear the same types of simple clothes and there are no dressmakers making fine apparel. All able-bodied citizens must work; thus unemployment is eradicated, and the length of the working day can be minimised: the people only have to work six hours a day (although many willingly work for longer). More does allow scholars in his society to become the ruling officials or priests, people picked during their primary education for their ability to learn. All other citizens, however, are encouraged to apply themselves to learning in their leisure time.

Slavery is a feature of Utopian life and it is reported that every household has two slaves. The slaves are either from other countries or are the Utopian criminals. These criminals are weighed down with chains made out of gold. The gold is part of the community wealth of the country, and fettering criminals with it or using it for shameful things like chamber pots gives the citizens a healthy dislike of it. It also makes it difficult to steal as it is in plain view. The wealth, though, is of little importance and is only good for buying commodities from foreign nations or bribing these nations to fight each other. Slaves are periodically released for good behaviour. Jewels are worn by children, who finally give them up as they mature.

Other significant innovations of Utopia include: a welfare state with free hospitals, euthanasia permissible by the state, priests being allowed to marry, divorce permitted, premarital sex punished by a lifetime of enforced celibacy and adultery being punished by enslavement. Meals are taken in community dining halls and the job of feeding the population is given to a different household in turn. Although all are fed the same, Raphael explains that the old and the administrators are given the best of the food. Travel on the island is only permitted with an internal passport and any people found without a passport are, on a first occasion, returned in disgrace, but after a second offence they are placed in slavery. In addition, there are no lawyers and the law is made deliberately simple, as all should understand it and not leave people in any doubt of what is right and wrong.

There are several religions on the island: moon-worshipers, sun-worshipers, planet-worshipers, ancestor-worshipers and monotheists, but each is tolerant of the others. Only atheists are despised (but allowed) in Utopia, as they are seen as representing a danger to the state: since they do not believe in any punishment or reward after this life, they have no reason to share the communistic life of Utopia, and will break the laws for their own gain. They are not banished, but are encouraged to talk out their erroneous beliefs with the priests until they are convinced of their error. Raphael says that through his teachings Christianity was beginning to take hold in Utopia. The toleration of all other religious ideas is enshrined in a universal prayer all the Utopians recite.

Wives are subject to their husbands and husbands are subject to their wives although women are restricted to conducting household tasks for the most part. Only few widowed women become priests. While all are trained in military arts, women confess their sins to their husbands once a month. Gambling, hunting, makeup and astrology are all discouraged in Utopia. The role allocated to women in Utopia might, however, have been seen as being more liberal from a contemporary point of view.

Utopians do not like to engage in war. If they feel countries friendly to them have been wronged, they will send military aid, but they try to capture, rather than kill, enemies. They are upset if they achieve victory through bloodshed. The main purpose of war is to achieve that which, if they had achieved already, they would not have gone to war over.

Privacy is not regarded as freedom in Utopia; taverns, ale-houses and places for private gatherings are non-existent for the effect of keeping all men in full view, so that they are obliged to behave well.

One of the most troublesome questions about Utopia is Thomas More's reason for writing it.

Most scholars see it as some kind of comment or criticism of contemporary European society, for the evils of More's day are laid out in Book I and in many ways apparently solved in Book II.[7] Indeed, Utopia has many of the characteristics of satire, and there are many jokes and satirical asides such as how honest people are in Europe, but these are usually contrasted with the simple, uncomplicated society of the Utopians.

Yet, the puzzle is that some of the practices and institutions of the Utopians, such as the ease of divorce, euthanasia and both married priests and female priests, seem to be polar opposites of More's beliefs and the teachings of the Catholic Church of which he was a devout member. Another often cited apparent contradiction is that of the religious toleration of Utopia contrasted with his persecution of Protestants as Lord Chancellor. Similarly, the criticism of lawyers comes from a writer who, as Lord Chancellor, was arguably the most influential lawyer in England. It can be answered, however, that as a pagan society Utopians had the best ethics that could be reached through reason alone, or that More changed from his early life to his later when he was Lord Chancellor.[7]

One highly influential interpretation of Utopia is that of intellectual historian Quentin Skinner.[8] He has argued that More was taking part in the Renaissance humanist debate over true nobility, and that he was writing to prove the perfect commonwealth could not occur with private property. Crucially, Skinner sees Raphael Hythlodaeus as embodying the Platonic view that philosophers should not get involved in politics, while the character of More embodies the more pragmatic Ciceronic view. Thus the society Raphael proposes is the ideal More would want. But without communism, which he saw no possibility of occurring, it was wiser to take a more pragmatic view.

Quentin Skinner's interpretation of Utopia is consistent with the speculation that Stephen Greenblatt made in The Swerve: How the World Became Modern. There, Greenblatt argued that More was under the Epicurean influence of Lucretius's On the Nature of Things and the people that live in Utopia were an example of how pleasure has dictated them as the guiding principle of life.[9] Although Greenblatt acknowledged that More's insistence on the existence of an afterlife and punishment for people holding contrary views were inconsistent with the essentially materialist view of Epicureanism, Greenblatt contended that it was the minimum conditions for what the pious More would have considered as necessary to live a happy life.[9]

Another complication comes from the Greek meaning of the names of people and places in the work. Apart from Utopia, meaning "Noplace," several other lands are mentioned: Achora meaning "Nolandia", Polyleritae meaning "Muchnonsense", Macarenses meaning "Happiland," and the river Anydrus meaning "Nowater". Raphael's last name, Hythlodaeus means "dispenser of nonsense" surely implying that the whole of the Utopian text is 'nonsense'. Additionally the Latin rendering of More's name, Morus, is similar to the word for a fool in Greek (). It is unclear whether More is simply being ironic, an in-joke for those who know Greek, seeing as the place he is talking about does not actually exist or whether there is actually a sense of distancing of Hythlodaeus' and the More's ("Morus") views in the text from his own.

The name Raphael, though, may have been chosen by More to remind his readers of the archangel Raphael who is mentioned in the Book of Tobit (3:17; 5:4, 16; 6:11, 14, 16, 18; also in chs. 7, 8, 9, 11, 12). In that book the angel guides Tobias and later cures his father of his blindness. While Hythlodaeus may suggest his words are not to be trusted, Raphael meaning "God has healed" suggests that Raphael may be opening the eyes of the reader to what is true. The suggestion that More may have agreed with the views of Raphael is given weight by the way he dressed; with "his cloak... hanging carelessly about him"; a style which Roger Ascham reports that More himself was wont to adopt. Furthermore, more recent criticism has questioned the reliability of both Gile's annotations and the character of "More" in the text itself. Claims that the book only subverts Utopia and Hythlodaeus are possibly oversimplistic.

Utopia was begun while More was an envoy in Flanders in May 1515. More started by writing the introduction and the description of the society which would become the second half of the work and on his return to England he wrote the "dialogue of counsel", completing the work in 1516. In the same year, it was printed in Leuven under Erasmus's editorship and after revisions by More it was printed in Basel in November 1518. It was not until 1551, sixteen years after More's execution, that it was first published in England as an English translation by Ralph Robinson. Gilbert Burnet's translation of 1684 is probably the most commonly cited version.

The work seems to have been popular, if misunderstood: the introduction of More's Epigrams of 1518 mentions a man who did not regard More as a good writer.

The eponymous title Utopia has since eclipsed More's original story and the term is now commonly used to describe an idyllic, imaginary society. Although he may not have directly founded the contemporary notion of what has since become known as Utopian and dystopian fiction, More certainly popularised the idea of imagined parallel realities, and some of the early works which owe a debt to Utopia must include The City of the Sun by Tommaso Campanella, Description of the Republic of Christianopolis by Johannes Valentinus Andreae, New Atlantis by Francis Bacon and Candide by Voltaire.

The politics of Utopia have been seen as influential to the ideas of Anabaptism and communism.[citation needed] While utopian socialism was used to describe the first concepts of socialism, later Marxist theorists tended to see the ideas as too simplistic and not grounded on realistic principles. The religious message in the work and its uncertain, possibly satiric, tone has also alienated some theorists from the work.

An applied example of More's Utopia can be seen in Vasco de Quiroga's implemented society in Michoacn, Mexico, which was directly inspired by More's work.

During the opening scene in the film A Man for all Seasons, Utopia is referenced in a conversation. The alleged amorality of England's priests is compared to that of the more highly principled behaviour of the fictional priests in More's Utopia, when a character observes wryly that "every second person born in England is fathered by a priest."

Continued here:

Utopia (book) - Wikipedia

DELHI / NEW DELHI: Massage and Spas – Utopia

SOUTH DELHI

Gay-managed Aarogya (which means something akin to "male vigor") is a traditional ayurvedic (medicinal) massage by professionally trained masseurs. The basement facility includes a reception lounge, four aircon massage rooms, showers, plus small dry sauna and steam room. They specialize in full body massage with coconut oil, olive oil, baby oil, aayurveda oil, cream massage, dry massage and powder massage. Friendly staff and management. Working class local clientele. Utopia Member Benefit: 10% DISCOUNT. Add your review, comment, or correction

Gay-friendly men's spa in South Dalhi. Massage, steam and shower in clean and tidy, private rooms. Dark room fun every Fri and steam party every Sat. Outcall massage also available to your home or hotel. Add your review, comment, or correction

See detailed listing under Saunas for Men. Gay-friendly, Very hygienic and nice smelling. They specialize in aromatic massage. Customers choose a new bottle of massage oil. They carefully dispose of used materials. Their dark chocolate massage gives makes your skin glow. Masseurs speak English and are trained in Thai massage techniques. Utopia Member Benefit: 15% DISCOUNT. Add your review, comment, or correction

Locate building 19. The entrance to Kalph Kaya is the first doorway in the alley on the side of the building, up a few stairs to the G/F landing. Delhi's first gay spa and sauna. Very friendly and casual, with four small rooms for massage (rooms are planned for renovation in late 2012), plus dry sauna, steam room, and dark resting room. Facilities are humble, cozy and kept tidy by the welcoming staff. Changing area has safety lockers for valuables and open-air hangers for your clothes to dry off from the humidity outside. Wet areas are very slippery so wear the rubber slippers provided. Printed menu with prices for different types of massage including Swedish, traditional ayurvedic Indian oil massage, cream massage and spa service for waxing. Staff and management are great. Outcall massage also available to your home or hotel. New in Aug 2012: large gym on opposite side of the stair landing adjacent to the reception area. Utopia Member Benefit: 10% DISCOUNT. Add your review, comment, or correction

Massage spa for men with a mostly gay clientelle. They provide male-to-male body massage. Masseurs come from all over India and are professional, well-educated, good looking and cerified between the ages of 20 and 35. Free Wifi. Outcall available to your hotel, apartments, villa or home anywhere in Delhi. 100% customer satisfaction assured. Add your review, comment, or correction

Gay-owned men's spa. Clean massage therapies including mani/pedi, foot spa, full body natural scrubs, body polishing, cream massage, dry massage, and a variety of aromatic oils to opt from. Weekend parties for men, a lounge for chit chat, dark room, smoking zone. Welcome green tea. They also design diet and nutrition programs for men. In and outcall available to your home/hotel. Utopia Member Benefit: 25% DISCOUNT. Add your review, comment, or correction

See detailed listing under Saunas for Men. A dozen masseurs on staff and four clean massage rooms. Massage using a wide variety of oils and aromas is available, including classic olive oil! There is also a tattoo parlor and salon for hair cuts and waxing with trained staff on hand to attend to your male grooming needs. Open daily, noon-11pm (please call ahead for salon services or tattooing). Outcall massage also available to hotels only. Utopia Member Benefit: R$100 DISCOUNT on massage. Add your review, comment, or correction

Gay-owned spa for men in South Delhi. Hygienic facilities with aircon and services including male-to-male full body massage, steam bath, hair removal, and body scrubs. Well-trained and hygenic staff. They have three massage rooms and one king size therapy room with TV and fridge. Fully air conditioned, dark room, smoking room, free wifi, lockers, showers, and parking. Outcall massage available. Utopia Member Benefit: 25% DISCOUNT. Add your review, comment, or correction

General Information | Saunas

Bagalore / Bengaluru | Mumbai | other cities and provinces

Go here to see the original:

DELHI / NEW DELHI: Massage and Spas - Utopia

Travel & Resources: HONG KONG – Gay Asia and… – Utopia

On Hong Kong Island most visitors will gravitate towards the cluster of international clubs in Shuang Wan, Central and its frenetic nightlife hub, Lan Kwai Fong. Another large cluster of island venues is located between Wanchai and Causeway Bay, discreetly hidden away in commercial buildings.

Over in colorful Kowloon, which has a dense collection of easy-to-access gay clubs along the MTR corridor, crowds throng through neon-lit high-rise canyons, going to/from shopping, eating or partying at innumerable entertainment venues from Tsim Sha Tsui up to Prince Edward. If you are looking for a bit of old Hong Kong, take a taxi to "Kowloon City" where traditional shops and restaurants are still managing (barely) to fend off encroaching redevelopment.

Hong Kong's population is nearing 8 million (that's over 300,000 Utopians).

Navigating the local gay scene is easy with our interactive Utopia Map of Gay & Lesbian Hong Kong:

Fruits in Suits (FinS) is an informal, gay professional networking event on each 3rd Tue of every month. Like-minded people - mostly professional expats (but they welcome all local professionals to join in) - come together in an exclusive private area for food, drinks and to chat, socialise with new people, network and promote LGBT rights in the territory. Add your review, comment, or correction

Founded by Filipino and Hong Kong GLBT, this club hosts meetings of the their GLBT Society and the 1000 strong Hong Kong Labour Party. They offer free legal advice and support service through sympathetic lawyers in Hong Kong and the Philippines. Utopia Member Benefit: DISCOUNTS on facility private hire, FREE legal advice, FREE meeting venue for GLBT societies. Add your review, comment, or correction

Pink Alliance aims to link LGBT organizations operating in Hong Kong, to assist them in their work and to provide a network for information in both Chinese and English. Pink Alliance also researches and campaigns on issues of key importance, as well as organising events to promote awareness of LGBT issues. Monthly meetings. Add your review, comment, or correction

Hong Kong's first gay social services center. The government funded center provides counseling, training workshops and a hotline to provide peer support for gay men. Closed Tue and public holidays. Add your review, comment, or correction

Gay and lesbian activities, support and services. Has the only face-to-face free counseling service for Gay people. Chinese only. Add your review, comment, or correction

A Hongkong-based non profit-making, non-governmental organization, established on 1st July 2003. They defend the human rights of sexuality minorities facing discrimination due to their sexual orientation and/or gender identity. WCHK effects this mission through advocacy, documentation, public education, oral history, cultural development, AIDS education on WSW (women having sex with women) and hosting monthly gatherings for lesbian, bisexual women and transgenders. Add your review, comment, or correction

Gay bookshop with large selection of local and imported books, magazines and videos to choose from as well as pride gifts. Add your review, comment, or correction

Gay-owned Koru Contemporary Art, specializing in modern sculpture, was established in 2001 to present a diverse range of contemporary international artists. A large selection of art featuring wood, bronze, stone, metal, glass, ceramic and mixed media sculpture, fine art, painting, prints and photography, may be found in their two gallery spaces, with a combined exhibition area of over 7,500sqf. Utopia Member Benefit: 5% DISCOUNT on art. Add your review, comment, or correction

Mainly gay, esp. weekends. Take a bus to Repulse Bay and then a ten minute walk, past the Welcome supermarket, to South Bay. The gay area is in front of the 40-story Ruby Court Bld. Some cruising around. Swimming possible. Bring insect repellent. UTOPIAN VERIFIED JUN 2014 Add your review, comment, or correction

This area seems to concentrate more gay-only men. Some nude sun-bathing (illegal) and action in the bushes (also illegal). Approach from South Bay Road. Steep path on the right-hand (sea side). Middle Bay is now so well-known that it is dangerous. For safety's sake it is better to make the 1-hour trip to Lantau Island and walk to the rather remote Cheung Sha Beach. UTOPIAN VERIFIED JUN 2014 Add your review, comment, or correction

MTR: TST or Jordan. Several cruisy facilities and lots of garden pathways. Most action takes place after 11pm. The park closes at midnight, but you can always leave (and enter) through the gate at Austin Rd (all other gates are closed after midnight). So don't panic when you are late and think you are locked up in the park. Mostly Asian guys under 40 years old. Add your review, comment, or correction

HONG KONG ISLAND -- Central, Lan Kwai Fong

Round-the-clock gay-friendly eatery with handsome staff. Popular for breakfast on Sun morning for those who have danced-til-dawn the night before. Add your review, comment, or correction

On any given Fri or Sat night after midnight, this Chinese fast food place (fried rice, fried noodles) is about 70% gay. When the clock hits 2am, the percentage rises up to 90%. Coming to Tsui Wah has become something of a ritual for late night partiers. Fish ball noodles are the signature dish here, and they also have simple sandwiches (i.e. two slices of white bread with luncheon meat and egg), steak, and acquired tastes such as stir-fried spaghetti! Add your review, comment, or correction

Large, bustling local eatery popular with groups of gays because of its inexpensive food and location close to the bars. Add your review, comment, or correction

KOWLOON -- Jordan, Mongkok, Tsim Sha Tsui, Yau Ma Tei

Foodie Alert! This tiny hole-in-the-wall has a disproportionate amount of international fame after recommendations by Newsweek, Time Out and celebrity chefs. Excellent dim sum at a reasonable price. Their dessert specialty is a succulent poached pear, so leave room. Sister branches in Jordan, Wanchai and TST. Add your review, comment, or correction

KOWLOON -- Tsim Sha Tsui, Yau Ma Tei

Located in east Kowloon, well off the tourist track (and overlooked by most locals), this quaint neighborhood stretch of eateries is certainly destined to be torn down and rebuilt into something gleaming, clean and modern. Too bad. Catch this slice-of-life from Kowloon's past for cheap eats and loads of character while you still can. Add your review, comment, or correction

Pronounced "dai gor", meaning big brother). A gay-owned, online menswear store aimed at the gay male market and at guys who like their t-shirts nicely fitted. Daigo is inspired by the beautiful and fashionable bros in Asia. They aim to provide great customer satisfaction by offering high quality and unique t-shirt designs that will be part of gay Asia and the gay community as a whole. Add your review, comment, or correction

Above Bohemian shop (take the stairway in the alley to the mezzanine floor). Gay men's undergear and clothing shop offers exclusive premium brand underwear, tanks, swimwear, shirts, and more including Andrew Christian (USA), 2EROS (Australia), Addicted (Spain) and NEWURBANMALE (Singapore). Utopia Member Benefit: 10% DISCOUNT. Add your review, comment, or correction

Look for the stairway entry marked #83 and 85, next to Express Korea Fast Food and walk up to 1/F. Gay-owned shop offering sexy branded undergear, toys, SM equipment, magazines, pride gifts and other rainbow merchandise. Open 5-9pm Mon-Sat (closed Sun). Utopia Member Benefit: 10% DISCOUNT. Add your review, comment, or correction

Gay-owned tanning studio established in 2004. They offer state-of-the-art tanning and collagenic equipment from Dr Muller, Germany. Tanning Studio was a sponsor of the Mr. Asia contest (2011, 2012, 2013). Utopia Member Benefit: 10% DISCOUNT on all tanning packages and lotions. Add your review, comment, or correction

Read more from the original source:

Travel & Resources: HONG KONG - Gay Asia and... - Utopia

Oceania Cruises – Cruise Vacations & Cruise Deals | Mid-Sized …

FROM THE OCEANIA CRUISES BLOG Frank Del Rio: Milestone Inaugural Voyages to Cuba

By Frank Del Rio, Co-founder of Oceania Cruises and President & CEO of Norwegian Cruise Line Holdings Ltd It is my pleasure to introduce our highly awaited Cuba Inaugural Voyages. I am delighted to be able to share the personal significance of this milestone with you.

Filled with a spectacular array of diverse and exotic destinations, your world awaits your discovery. There is simply no better way to explore it than aboard the elegant ships of Oceania Cruises. Our unique itineraries are wide-ranging, featuring the most fascinating destinations throughout the world. Regatta, Insignia, Nautica, Sirena, Marina and Riviera are all intimate and luxurious, with each calling on the worlds most desirable ports, from historic cities and modern meccas to seaside villages and faraway islands. On a voyage with Oceania Cruises, each day offers the rewarding opportunity to experience the history, culture and cuisine of a wondrous new destination.

Relax on board our luxurious ships and savor cuisine renowned as the finest at sea, rivaling even Michelin-starred restaurants ashore. Inspired by Master Chef Jacques Ppin, these culinary delights have always been a hallmark that distinguishes the Oceania Cruises experience from any other. Considering the uncompromising quality, perhaps the most remarkable aspect of an Oceania Cruises voyage is its incredible value. Lavish complimentary amenities abound, and there are never supplemental charges in any of the onboard restaurants. Value packages ensure that sipping a glass of vintage wine, surfing the Internet or enjoying a shore excursion is both convenient and affordable.

See the original post here:

Oceania Cruises - Cruise Vacations & Cruise Deals | Mid-Sized ...

Offshore – Wikipedia

Offshore (Engels: weg van de kust), ook wel als buitengaats of aflandig aangeduid, is de aanduiding van activiteiten die plaatsvinden op enige afstand van de kust, meestal gericht op exploratie en winning van olie en gas, maar in toenemende mate ook van windenergie en aquacultuur. Het is onder te verdelen in een mijnbouwdeel met olie- en gasplatforms en een maritiem deel, zoals duikondersteuningsschepen, platformbevoorradingsschepen, pijpenleggers en kraanschepen. De offshore begon vlak na de Tweede Wereldoorlog, aanvankelijk vooral in de Golf van Mexico in ondiep water. Tegenwoordig vindt onder druk van de afnemende beschikbare hoeveelheid olie dicht bij de kust een verschuiving plaats naar diep water.

Onder offshoretechniek wordt verstaan het ontwerpen, construeren en plaatsen van kunstwerken die dienstdoen bij industrile processen of publieke voorzieningen en de exploratie en winning van olie en gas op zee.

Exploratie bestaat uit meerdere fases. Aanvankelijk begon dit met geologische opsporing, waarbij vooral oppervlaktegegevens worden genterpreteerd. In het midden van de jaren twintig van de twintigste eeuw waren alle aan de oppervlakte liggende velden in de Verenigde Staten in kaart gebracht en had men andere methoden nodig om dieper gelegen velden te vinden. De methodes van deze geofysische opsporing die op zee bruikbaar zijn, zijn seismiek, gravimetrie en magnetisch onderzoek, dat wordt uitgevoerd met onderzoeksvaartuigen. Bij veelbelovende aanwijzingen wordt een exploratieconcessie aangevraagd om daarna proefboringen te doen. Deze exploratieboring moet uitsluitsel geven of een formatie werkelijk olie of gas bevat. Dit vakgebied is de petrofysica. Deze proefboringen worden in ondiep water uitgevoerd door hefeilanden en in diep water door boorschepen en half-afzinkbare platforms. Met behulp van structurele geologie wordt daarna de omvang van een olie- of gasvoorkomen vastgesteld. Als die voldoende is, kan een oliemaatschappij besluiten tot winning over te gaan. Hiervoor worden productieputten geboord.

Al aan het einde van de negentiende eeuw werd in Californi, waar veel olie op natuurlijke wijze naar de oppervlakte lekt (seeps), net uit de kust gebouwd vanaf pieren in olievelden aan de wal die zich voortzetten in zee. Begin twintigste eeuw werd ook begonnen met boren naar vooral gas in het Eriemeer, voornamelijk aan de Canadese kant. Enkele jaren later werd ook in het Caddomeer op de grens van Louisiana en Texas geboord vanaf houten platforms. In Venezuela werd vanaf de jaren twintig in het Meer van Maracaibo naar olie geboord, terwijl in de jaren dertig werd begonnen in de Kaspische Zee.

In de jaren twintig van de twintigste eeuw gebruikte men in de moerassen, meren en baaien van Louisiana de houten platforms om vanaf te boren. In deze overgangszone onder invloed van het getij begon Chevron gebruik te maken van bakken om het materiaal sneller te kunnen verplaatsen. Ter plekke liet men deze afzinken tot op de bodem van het ondiepe water om daarna te boren. De eerste bak die op deze manier te werk ging, was de Giliasso, genoemd naar Louis Giliasso die dit idee had ontwikkeld. De stabiliteit van deze bakken was echter beperkt, zodat de waterdiepte waarin dit gebruikt kon worden, beperkt was tot zo'n drie meter. In 1937 lieten Pure Oil en Superior Oil door Brown & Root het tot dan toe grootste platform van de Golfkust bouwen, nog steeds van hout. In 1946 bouwde Brown & Root een platform met stalen palen voor Magnolia Petroleum.

Dit was echter allemaal dicht bij de kust. Begin 1947 liet Superior 18 mijl uit de kust bij Vermilion Parish een platform bouwen. Een platform van Kerr-McGee wist echter in oktober enkele maanden voor Superior een olieput in productie te brengen. Dit gebeurde in Ship Shoal Block 32 voor de kust van Louisiana in de Golf van Mexico met Rig 16 aan boord van de Frank Phillips. Dit wordt wel beschouwd als het begin van de offshore-industrie.

In de jaren vijftig verplaatste de boring zich naar steeds dieper water en werden eerst bakken en tenders kleine scheepsvormige bakken gebruikt. Later werden platforms gebruikt die naar locatie werden gesleept en daarna afgezonken tot ze rustten op de zeebodem. Deze afzinkers waren een idee van John T. Hayward die voor Barnsdall Oil & Gas werkte. Hierbij werden de voordelen van bakken gecombineerd met die van platforms op palen. Door op de bakken kolommen te plaatsen met daarop het werkdek was de invloed van de golven beperkt en had men toch een verplaatsbaar platform. De eerste was de Breton Rig 20, die in waterdieptes tot 6 meter kon werken. Nadat olie-exploratie in de Golf stil had gelegen van 1950 tot 1953 vanwege de Tidelands controversy, begon Alden J. Laborde zijn eigen bedrijf Odeco om met financiering van Murphy Oil een nieuw type afzinker te bouwen dat geschikt was voor dieper water. Dit platform, de Mr. Charlie, kon in waterdieptes tot 12 meter werken. Dit rechthoekige type werd snel populair, maar ook snel daarna vervangen door de ultieme afzinker het kolomgestabiliseerde platform of flessentype, waarvan de eerste Rig 46 was van Kerr-McGee in 1956. Dit type kon boren in waterdieptes tot 55 meter.

In waterdieptes verder uit de kust konden ook deze platforms echter niet meer aan het werk. Al in de jaren dertig werd gebruikgemaakt van hefeilanden voor constructiewerkzaamheden op zee en ook bij de landingen in Normandi tijdens D-Day werd hier gebruik van gemaakt. In 1950 liet Leon B. DeLong een aantal hefeilanden bouwen voor radarinstallaties in waterdieptes van 20 meter. De mobiliteit was een groot voordeel en in 1954 lieten meerdere bedrijven hefeilanden bouwen, waaronder Rig No. 51 van The Offshore Company en Mr. Gus van Glasscock Drilling. Tegenwoordig kan er met hefeilanden in waterdieptes tot 120 meter geboord worden.

De eerste half-afzinkbare platform werd per ongeluk uitgevonden in 1961. Blue Water Drilling Company bezat de uit vier kolommen bestaande afzinkbare Blue Water Rig No.1, gebouwd in 1957. Ze gebruikten deze voor Shell Oil Company in de Golf van Mexico om in 25 meter diep water te boren met het onderste deel van de romp op de bodem. Omdat de pontons niet genoeg drijfvermogen hadden om het totale gewicht van het rig te ondersteunen werd het naar locatie gesleept op een diepgang tussen de bovenzijde van de pontons en de onderzijde van het dek. Men merkte op dat de bewegingen veroorzaakt door de deining op deze diepgang gering waren vergeleken met conventionele schepen. Blue Water Drilling en Shell besloten gezamenlijk het platform drijvend te gebruiken voor boring.

Sindsdien worden half-afzinkbare platforms specifiek ontworpen voor de offshore industrie. In 1963 werd het eerste echte half-afzinkbare platform gebouwd, de Ocean Driller van Odeco.[1] De grootste ramp met een half-afzinkbaar platform was het kapseizen van de Ocean Ranger, ook van Odeco, tijdens een storm op 15 februari 1982 op de Atlantische Oceaan, 315 kilometer zuidoost van St. John's bij de Grand Banks, waarbij alle 84 bemanningsleden omkwamen.

Waar de waterdiepte in de Golf van Mexico geleidelijk toeneemt, is deze bij Californi al dicht bij de kust te diep voor platforms die op de zeebodem rusten. Om ook in deze wateren te kunnen boren, begon Shell in 1948 een consortium met Continental, Union en Superior (CUSS). In 1953 begonnen ze met proefboringen vanaf de verbouwde Submarex. Hierbij werd geboord vanaf een boorvloer over de zijde, wat problemen gaf met de slagzij. Hierop werd de CUSS I gebouwd, die boorde door een moonpool in de midscheeps. De CUSS I kon op ankers boren in waterdieptes tot ruim 100 meter.

De CUSS I werd overgenomen door Global Marine, die ook een serie grotere boorschepen liet bouwen. Bij grotere waterdieptes werd ankeren problematisch, en daarom maakte de CUSS I in 1961 tijdens Project Mohole een poging om door de aardkorst te boren in de Mohorovii-discontinuteit gebruik van schroeven om op positie te blijven bij een waterdiepte van zo'n 3500 meter, het begin van dynamic positioning. Desondanks maken nog veel boorschepen en semi-submersibles gebruik van ankersystemen, die lichter zijn geworden door over te stappen van kettingankers naar draadankers en zo bruikbaar zijn tot zeker 1500 meter en met vooraf geplaatste ankers tot nog minstens 1000 meter dieper.

De ontwikkelingen op de Noordzee begonnen pas later, mede door de zwaardere weersomstandigheden, maar vooral omdat gedacht was dat er niet voldoende olie en gas te winnen zou zijn. Daarnaast ontbrak internationale regelgeving over de verdeling van het continentaal plat. In 1958 werd het UNCLOS I verdrag (tegenwoordig onderdeel van het VN Zeerechtverdrag) afgesloten. In 1964 trad het in werking, zodat het continentaal plat van de Noordzee verdeeld werd tussen de aangrenzende landen. Op 29 mei 1959 werd in Kolham de Slochterse gasbel ontdekt, waarmee het vermoeden rees dat ook in de Noordzee aardgas zou zijn te vinden. Op 17 september 1965 boorde het hefeiland Sea Gem gas aan in de BP-concessie, om slechts enkele dagen later te kapseizen. De zware weersomstandigheden vereisten een aanpassing van de gebruikte technologie om veilig te kunnen werken.

Op 6 oktober 1973 brak de Jom Kipoeroorlog uit, waarna de OPEC een olie-embargo instelde voor de Verenigde Staten en Nederland, wat leidde tot de oliecrisis van 1973. Dit bleek een enorme stimulans voor de offshore-sector, vooral op de Noordzee.

Tegenwoordig is de offshore-industrie wereldwijd bezig met de exploratie en winning van olie en gas. Daarbij worden de Golf van Mexico, Brazili en West-Afrika wel gezien als de gouden driehoek, waarbij steeds meer de nadruk komt te liggen op diepwater ( 300 tot 2400 meter) en ultra-diepwater (meer dan 2400 meter).

De ontwikkeling van een olieveld bestaat uit meerdere onderdelen, waarvan het platform de meest zichtbare is, hoewel er ook velden zijn die geheel uit onderzeese installaties bestaan, zoals Ormen Lange. Daarnaast heeft een veld een infrastructuur, zoals olie- en gaspijpleidingen, waterinjectieleidingen, elektriciteitsleidingen en onderzeese installaties die aangelegd moeten worden. De constructie van platforms gebeurt grotendeels op werven aan de wal. De manier waarop deze daarna genstalleerd worden is onder andere afhankelijk van de grootte en de waterdiepte.

Met behulp van lanceerbakken kunnen jackets en compliant towers worden gelanceerd. Om kosten te reduceren nadat in 1986 de olieprijs was gedaald, werden jackets ontworpen die met een kraanschip konden worden genstalleerd. Omdat deze jackets niet ontworpen hoeven te worden voor de krachten die tijdens het lanceren optreden, kunnen deze lichter uitgevoerd worden dan gelanceerde jackets. Zwaardere jackets en compliant towers worden echter nog steeds gelanceerd.

Om op zee te hijsen, kan gebruik worden gemaakt van meerdere opties. Drijvende bokken werden al vroeg gebruikt. De komst van grote kraanschepen maakte constructie goedkoper.

De grootste kraanschepen worden gebruikt voor constructiewerkzaamheden in de offshore. De grotere schepen zijn vaak half-afzinkbaar, maar ook conventionele scheepsvormen (monohulls) worden gebruikt. Het verschil met een drijvende bok is dat de kranen kunnen roteren.

In 1949 liet J. Ray McDermott de Derrick Barge Four bouwen, een bak die uitgerust was met een 150 ton roterende kraan. Met het verschijnen van dit soort schepen veranderde de offshoreconstructie. In plaats van constructie in delen, kunnen jackets en dekken als modules aan de wal worden gebouwd. Voor gebruik in het ondiepe deel van de Golf van Mexico voldeden deze bakken voorlopig.

In 1963 liet Heerema een Noorse tanker, de Sunnaas, ombouwen tot het eerste kraanschip met een capaciteit van 300 ton in de offshore dat een echte scheepsvorm had, waarna het werd omgedoopt tot de Global Adventurer. Dit type kraanschip was beter geschikt voor de weersomstandigheden op de Noordzee.

Het in 1967 opgerichte Netherlands Offshore Company bracht in 1978 het eerste half-afzinkbaar kraanschip in de vaart, de Narwhal. Vanwege financile problemen werden de schepen van NOC verkocht aan McDermott, waarmee het bedrijf ophield te bestaan.

In datzelfde jaar liet Heerema ook twee half-afzinkbare kraanschepen bouwen, de Hermod en de Balder, elk met n 2000 shortton en n 3000 shortton kraan. Later hebben beide overigens een upgrade gekregen, zodat ze nu een grotere capaciteit hebben. Dit type kraanschip was veel minder gevoelig voor zeegang en deining, waardoor ook gedurende de wintermaanden kon worden gewerkt op de Noordzee. De grote stabiliteit laat ook toe dat er zwaarder getild kan worden dan met een monohull. De grotere werkbaarheid en capaciteit van de kranen bracht de installatietijd van een platform terug van een heel seizoen naar een paar weken. Waar de topside van een platform daarvoor opgebouwd moest worden uit vele kleine delen, kon deze nu veelal in een keer geplaatst worden, waardoor de totale constructie lichter uitgevoerd kon worden en een groter deel van het werk aan de wal plaats kon vinden en dus goedkoper was.

Genspireerd door dit succes werden gelijksoortige schepen gebouwd. In 1985 kwam de DB-102 in de vaart voor McDermott, met 2 kranen met een capaciteit van 6000 ton elk. Micoperi liet de M7000 bouwen in 1986 met twee kranen van 7000 ton elk.

Midden jaren tachtig was de hausse in de offshore echter over. De prijs van een vat olie daalde tot onder de $10 waardoor investeringen vrijwel tot stilstand kwamen en samenwerking gezocht moest worden. In 1988 werd een joint venture tussen Heerema en McDermott gevormd, HeereMac. In 1990 moest Micoperi een faillissement aanvragen. Dat gaf Saipem in het begin van de jaren zeventig nog een grote speler in de offshoreconstructie, maar eind jaren tachtig nog maar marginaal aanwezig de kans om in 1995 de M7000 over te nemen. In 1997 nam Heerema de DB-102 over van McDermott na beindiging van de joint venture.[2] Het schip werd omgedoopt in Thialf en na een upgrade in 2000 tot tweemaal 7100 ton is het het grootste kraanschip ter wereld.

Voor dekken met gewichten die kraanschepen niet aankunnen of wanneer deze niet beschikbaar zijn, wordt gebruikgemaakt van bakken voor float-overs. Het gaat hierbij over gewichten van enkele tienduizenden tonnen. De bak wordt hierbij tussen de poten van het jacket gebracht en daarna geballast totdat het overhangende dek op het jacket staat.

Gravity based structures worden met behulp van sleepboten naar locatie gebracht, waarna ze geballast worden tot ze op de zeebodem rusten. Deze techniek is vooral veel gebruikt in Noorwegen, waar veel platforms van het condeeptype staan. Ook drijvende platforms als FPSO's, TLP's, semi-submersibles en spars worden naar locatie gesleept om daar vervolgens afgemeerd te worden.

De infrastructuur van een veld bestaat naast een of meerdere platforms uit olie- en gaspijpleidingen, waterinjectieleidingen, elektriciteitsleidingen en onderzeese installaties.

Hoewel ook de kleinere leidingen en installaties door de grote pijpenleggers en kraanschepen worden aangelegd, wordt dit vaak gedaan door zogenaamde Offshore Support Vessels. Deze zijn uitgerust met een kraan die vaak enkele tientallen tot honderden tonnen kan tillen, dan wel met een A-frame waarmee installaties op de zeebodem kunnen worden uitgevoerd.

In ondiep water wordt in de Verenigde Staten ook gebruikgemaakt van liftboten, bootjes met eigen voortstuwing die zich kunnen opheffen zoals een hefeiland en meestal uitgerust zijn met een kraan.

Bij onderzeese pijpleidingen voor een platform wordt onderscheid gemaakt tussen de leidingen waarmee de olie en gas uit diverse putten naar het platform wordt getransporteerd de tie-backs en die waarmee het na behandeling naar de wal wordt getransporteerd de exportleidingen. Export kan ook met behulp van een shuttletanker, maar vindt vaak plaats met behulp van een pijpleiding. Deze worden gelegd met behulp van bakken waarvan de ankers continu verplaatst worden door ankerbehandelingssleepboten. Tegenwoordig zijn de grootste pijpenleggers schepen en voorzien van dynamic positioning. Er zijn verschillende methoden om pijp te leggen. Bij S-lay verlaat de leiding het schip horizontaal, bij J-lay verticaal. Bij reel-lay wordt de pijp gelegd vanaf een grote spoel.

Waar hefeilanden en boorschepen vooral gebruikt worden voor proefboringen en om de uiteindelijke putten te boren, kunnen deze na voltooiing daarvan vertrekken. Na installatie van een productieplatform die vaak booreilanden worden genoemd, hoewel de meeste niet kunnen boren wordt de winning daarmee voortgezet. De beweging naar steeds dieper water heeft een scala aan platforms opgeleverd. Bij grotere waterdieptes werden de normale jackets te groot en zwaar om economisch nog haalbaar te zijn. Waar deze jackets stijf zijn ontworpen om alle weersomstandigheden te kunnen weerstaan, werd voor grotere waterdieptes overgestapt op buigzame constructies, compliant towers die meegeven en daardoor lichter gebouwd kunnen worden. Voor nog grotere waterdieptes ging men over naar drijvende platforms:[3]

In de Verenigde Staten moet van de MMS een platform binnen een jaar na het buiten gebruik stellen worden verwijderd, tenzij gebruik wordt gemaakt van het alternatief volgens de Rigs-to-Reefs-wetgeving. In Europa was het dumpen van afval vanaf schepen en vliegtuigen aan banden gelegd door de Oslo-conventie van 1972, die later is vervangen door het OSPAR-verdrag. De Brent Spar-affaire zorgde voor een aanscherping van dit verdrag in 1998, zodat alle platforms in de Noordzee ontmanteld moeten worden, hoewel dit verdrag meer ruimte laat dan het Verdrag van Helsinki dat geldt voor de Oostzee. Een poging in 1996 om via het Verdrag van Londen het dumpen wereldwijd te verbieden mislukte.

Dit betekent dat er een ontmantelingsmarkt is van enkele honderden platforms op de Noordzee, hoewel deze markt riskanter is dan installatie. Aangezien er geen first oil is aan het einde van het project, is het al snel financieel aantrekkelijk voor een oliemaatschappij om investeringen naar achteren te verschuiven. Een aantal methodes en voorstellen voor ontmanteling zijn gebaseerd op het gebruik van dezelfde kraanschepen die ook voor installatie werden gebruikt.

Andere voorstellen baseren zich vooral op het catamaran-idee, waarbij tussen de twee rompen ruimte is uitgespaard. Deze U-vorm kan dan om een dek of jacket geplaatst worden, waarna ontballast wordt waarmee de constructie gelicht wordt. Andere voorstellen maken gebruik van hydraulische systemen en hijsdraden, eventueel gecombineerd. Voorbeelden zijn Versatruss, de Pieter Schelte van Allseas, de MPU Heavy Lifter van het inmiddels failliete MPU Offshore Lift en de Twin Marine Lifter. Hiervan bestaat alleen de eerste. De Pieter Schelte is nog in de ontwerpfase, de MPU Heavy Lifter wordt gesloopt voordat deze is voltooid en de Twin Marine Lifter is nog in de conceptfase.

Maritieme techniek houdt zich bezig met scheepsbouw en scheepvaart en richt zich ook op het transport van goederen en personen. Offshore is een vakgebied dat zich uit civiele techniek (de constructies), werktuigbouwkunde en scheepsbouwkunde heeft ontwikkeld. De laatste tijd verschuift het vakgebied meer naar de scheepsbouwkundige kant. Dit omdat offshore olie- en gasvelden zich op steeds grotere diepten bevinden. Hiermee komt de switch van 'fixed platforms' naar 'floating platforms'; de laatste zijn vooral een scheepsbouwkundige aangelegenheid.

Continue reading here:

Offshore - Wikipedia