I have attempted to join and am awaiting my email data.
Meanwhile, I have several chunks of Ironwood, an extremely hard wood with a beautiful grain.
It has ocurred to me that I might be able to tumble these pieces of wood with an appropriate medium like walnut shells, and polish them to a
Ever since I built my first soda can solar heater three years ago, I've received plenty of input on how to improve the design for better heat output. For that reason, I never hooked up the first one – in fact, I gave it away to a friend – and set about building a bigger, better ver
I was surprised to see that the cat was maimed in a farm Harvester accident over in England.
I wondered why the cat got hurt? Was it lack of training? What laws govern the farm employment of Cats over their in Jersey?
Here is a link: Prosthetic cat
Congrats to the
From BBC News | Science & Environment | UK Edition:
It is one of the most exquisite views we have ever had of the Earth. This colourful new map traces the subtle but all pervasive influence the pull of gravity has across the globe. Known as a geoid, it essentially defines whe
From Popular Science - New Technology, Science News, The Future Now:
A year behind schedule, a team of French engineering students is finally preparing to send Nephelios, the solar-powered manned airship they've developed, on its maiden voyage across the English channel. The am
can anybody advise me on how to fit markon and series 4 authomatic voltage regulator(avr)
Any body can tell me what is the signifcance of importance factor for wind and sesmic calculation and how to choose the value of it.
i have a gas suction system from electrolysis pot cell through a ramifying pipeline to a treatment station. a centrifugal fan is situated downstream.
when pots are stopped, parts of the pipeline are isolated fron the network and the total quantity of gases getting into the fan reduc
I'm looking for a lightweight "grout" to cover the outside of an old log house. Something similar to plaster, weather resistant, paintable, having some ability to move with the normal expansion and contraction of the logs. Some "R" value would be great. Spray on or trowel, could use wire cloth for a
Here’s a challenge for all of you: Nasal polyp removed from a 50 year old Indian man with complaints of chronic nasal obstruction. Histologic exam reveals the following:
Hematoxylin and Eosin, 40x final magnification
Hematoxylin and Eosin, 100x final magnification
Hematoxylin and Eosin, 200x final magnification
Hematoxylin and Eosin, 600x final magnification
Hematoxylin and Eosin, 600x final magnification
Keith's note: I (and other space media) just got this White House Press Secretary advisory one minute ago from NASA PAO. I had a total of 6 minutes advanced notice. I can't think of a better way to cut down on questions:
"Today: Senior Administration Officials to Hold A Conference Call Briefing on the New National Space Policy
WASHINGTON--Today at 1:30 PM EDT, Senior Administration Officials will hold a conference call with reporters to discuss the administration's new National Space Policy.
WHAT: Conference call briefing to discuss the administration's new National Space Policy
WHO: Barry Pavel, NSC Senior Director for Defense Policy and Strategy,
Jim Kohlenberger, Chief of Staff of the Office of Science and Technology Policy,
Peter Marquez, NSC Director of Space Policy
WHEN: Today, Monday, June 28 at 1:30 PM EDT
Dial-in: United States: (877) 941-8639
Call Title: "White House Conference Call"
I will live tweet the content of this briefing here.
-- National Space Poicy (full text)
-- Fact Sheet: The National Space Policy
The universe. That’s as in the totality of everything that exists. Everything. Hair, hide, fur, feathers, and all. I’m not going to get into any arguments about whether or not this universe is the “only” universe; let’s just say it’s everything we can physically encompass in this dimension. That which is currently known.
That should do for a working definition. But what are the physical parameters of “everything”? Does it begin? Does it end? If it ends, what’s beyond the “end”? What is “it”, exactly?
A very small window on infinity - brough to you by Hubble
You know what? I wish I knew. We’ve gained so much knowledge in the last 100,000 years, sometimes we have to pause a moment, because we really know very little about the universe in which we live. We’re like the residents of a tiny island in a big, big ocean. Early explorers here thought that if you reached the end of the ocean (or the end of the land, for that matter), you simply fell off. We’re at about the same place in thinking about the universe. Some people think there is a form of “boundary” there; some that it’s impossible to reach the “end” because there is no end. Some think that if you go far enough in one direction, you’ll end up back where you started… just like on Earth.
There is so much we don’t know. What we do know is usually lumped together in the catchphrase “known universe”. That’s a polite reminder that any ideas we hold dear today could be blown out of the water tomorrow. You’ll also hear the phrase “observable universe”, which is (as it sounds) the part of the universe that is possible for us to observe. The observable universe is limited by what light has had time to reach us.
NASA - WMAP Cosmic Microwave Background; one representation of the universe
One thing we DO know about the universe is that it’s big. No, I mean it’s really big. Bigger than that. At the far end of our observations, we’re seeing things that are about 46.5 billion light years away. Don’t plotz on me; I know the age of the universe is believed to be about 13.7 billion years old, but we are seeing things more distant due to the continuous expansion of the universe. Just think about it; 46,500,000,000 light years away. In any direction. That’s about 14 billion parsecs. A parsec is about 19 trillion miles (19,000,000,000,000 miles), or about 31 trillion kilometers (31,000,000,000,000 km). Since the observable universe is about 46.5 billion light years away in any direction, you can infer that the observable universe is a sphere with a diameter of about 93 billion light years, or about 24 billion parsecs. Now, you go multiply 24 billion by 19 trillion, and you’ll know about how many miles you’re dealing with.
You know, distances like that don’t really have any meaning to the average person. There is simply no way we can relate to that. There’s also no way we can relate to what a very tiny part we are to the universe. I can try it with the old “grains of sand on a beach” analogy, but you’re going to have to work a little. How about this: If one grain of sand from all the beaches and deserts on Earth was a galaxy, and you were sitting on a planet around a star in this galaxy, looking at a grain of sand… there you are! You’re on that second grain of sand, which is your solar system.
You didn't expect me to pass up this opportunity, did you?
Now, just imagine that the observable universe, just what we can see, is that second grain of sand. That’s probably closer to the true size of the universe.
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Underwater photographer Keith Ellenbogen photographed the Atlantic bluefin tuna both inside and outside of the massive underwater cages used by purse seiner fishing boats on a recent expedition with the watchdog non-profit Oceana. On this expedition, the crew on board the Marviva Med documented the impact of bottom trawling and driftnets on marine ecosystems, and identified marine areas that need protection. Ellenbogen says, “Each year, as they have done for thousands of years, bluefin tuna migrate to the Mediterranean Sea to reproduce. At this moment, I felt a sense of urgency as I observed populations much smaller than expected. I imagined what life must have been like only a few years ago when tuna were abundant, swimming free, and able to reach their true, glorious size.”
The Atlantic bluefin can live 40 years, grow to 15 feet in length and weigh up to 1,400 lbs. They are warm-blooded and able to stabilize their body temperature as they migrate across the Atlantic Ocean, and have been recorded swimming at speeds of up to 55 mph; the word “tuna” comes from the Greek word “to rush.” Bluefin are sought after for the high prices they fetch on the international sushi market: individual Atlantic bluefin tuna have been sold for more than $100,000. Scientists and conservationists fear the Atlantic bluefin tuna is especially vulnerable to extinction due to overfishing, given its low reproduction rate and late maturity, at 3-5 years.
Ellenbogen and a team of scientists observed the tuna being caught by large purse seiner fishing boats from Turkey, France, Spain, and Italy among other countries, with some illegally using spotter planes to locate the fish. The tuna are transferred from fishing nets underwater to cages approximately 300 feet in diameter and 80 feet deep where they are towed slowly (at a speed of about 2 knots) to coastal destinations a couple of days or even weeks away, where they are fattened and then sold to market.
Images courtesy Oceana/Kieth Ellenbogen
Bluefin tuna in a tuna cage, Malta, Marviva Med expedition, June 2008
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Anyone have any experience with the manufacturer MTH and using their pumps at 500 psig and above? They make a regenerative turbine that is less expensive than the competitors, but are having a hard time referring me to customers using them at 500 psig, even tho they are rated to 1000 psig.
T
As a younger stronger particle smasher, the Large Hadron Collider can turn even baby steps into new records. Over this past weekend, the LHC beat another personal best–colliding its most protons yet at 10,000 particle collisions per second (about double its earlier rate). Physicists believe this is a crucial step on the collider’s hunt for new physics.
In November of 2009, the LHC collided its first protons as it started its quest to find the suspected mass-giving particle known as the Higgs Boson. The collider is still running at half of its designed maximum energy, but after this weekend, the number of particles per bunch traveling in the ring is just what physicists had planned. This is essential, says CERN physicist John Ellis:
“Protons are complicated particles, they’ve got quarks, [and other small particles], and colliding them is like colliding two garbage cans and watching carrots come out…. The more collisions we get, the closer we get to supersymmetry, dark matter, the Higgs boson and other types of new physics.” [BBC]
Here are some basics:
Energy: The LHC is already the worlds “most powerful” collider. Power is a measure of energy doled out over time and the LHC can collide its protons with an energy of 7 TeV (3.5 TeV per beam). Second place is the Tevatron collider at Fermi Lab near Chicago. The Tevatron can collide its particles at 2 TeV (1 TeV per beam). LHC researchers hope to get to their designed max of 14 TeV by 2013.
Luminosity: When it comes to getting the goods (i.e. new physics) out of colliding protons, it’s not only how much energy the particles have, but also how often you can get those particles to smack into each other. That’s what physicists call luminosity. This weekend, the LHC achieved 10,000 particle collisions per second. Though the Tevatron has had higher luminosities, LHC physicists are working to beat their personal record from this weekend. Researchers at the LHC will also now work to make the weekend’s number of collisions an easier feat, making higher luminosities a routine matter.
Bunches and Intensity: To increase the number of collisions per second, you need a highly focused beam made of many particles traveling together (particle accelerators use magnets to steer and focus the particles in a beam). The weekend was the first time that physicists accelerated the number of particles per bunch they originally hoped for when they designed the machine: each bunch consisted of as many as 100 billion protons. LHC researchers hope to increase the number of bunches in a beam to 2,808 by 2016.
Such landmark records spur the competition between the two colliders.
“It’s clear that the LHC is the new boy in town, but in two years running we’re going to put Fermilab out of business,” operation group leader Mike Lamont told BBC News. [BBC]
Related content:
80beats: A Sweet Smashup: The LHC Shatters the Collison Energy Record
80beats: In 1 Week, the LHC Will Try to Earn the Title, “Big Bang Machine”
80beats: Rumors of the LHC’s Demise Have Been Greatly Exaggerated
80beats: LHC Beam Zooms Past 1 Trillion Electron Volts, Sets World Record
80beats: Baguettes and Sabateurs from the Future Defeated: LHC Smashes Particles
Image: CERN
What struck down ancient Egypt’s King Tutankhamen at the tender age of 19?
Just this winter, Egyptian researchers seemed to think they had a definitive answer. After years of genetic tests and CT scans, they concluded that royal incest had produced a sickly boy with a bone disorder, and argued that a malaria-bearing parasite finished him off. But now a team of German researchers is arguing that the observations actually point to death from the inherited blood disorder sickle cell disease (SCD).
People with SCD carry a mutation in the gene for haemoglobin which causes their red blood cells to become rigid and sickle-shaped. A single copy of the sickle-cell gene confers increased immunity to malaria, so it tends to be common in areas where the infection is endemic – such as ancient Egypt. People with two copies of the gene suffer severe anaemia and often die young. [New Scientist]
In a letter to the Journal of the American Medical Association, the German scientists argue that the bone damage seen in the investigation of Tut’s mummy was likely the result of sickle cell disease, as the sickle-shaped cells can block blood flow through capillaries and therefore keep oxygen from reaching bone tissue. They also argue that malaria is more likely to kill young children in areas where the disease is endemic; those who survive to their teenaged years typically have a degree of immunity.
The German researchers, who hail from the Bernhard Nocht Institute for Tropical Medicine, are eager to follow up on their theory.
According to the German researchers, the Egyptian researchers could have tested Tut’s DNA for the genetic blood disorder. “To confirm sickle cell disease or the genetic trait would take just 60 minutes and is easy – we wonder why the authors haven’t done that so far,” said [study coauthor] Christian Meyer. [LiveScience]
The Egyptian researchers say they’re interested in the new theory, and will investigate it in due time. For now, the mystery that began with the boy king’s death around 1324 B.C. will linger on.
Related Content:
80beats: What Killed King Tut? Incest and Malaria, Study Says
80beats: Egypt Finds Tombs of Pyramid Builders, And More Evidence They Were Free Men
80beats: X-Rayed Mummies Reveal That Ancient Egyptians Had Heart Disease
80beats: Scientist Smackdowns (our growing compendium of juicy scientific arguments)
DISCOVER: 5 Questions for the Mummy Doctor
Image: Wikimedia
FOR IMMEDIATE RELEASE:
INDIANAPOLIS, IN (6/28/10) – Mike Wherry, Libertarian Party candidate for Secretary of State, extends his congratulations to Charlie White and Vop Osili on their respective nominations for Secretary of State.
“I would like to congratulate Charlie White and Vop Osili and welcome them to the race. I hope that we have a spirited [...]
iam doing my be civil .iam quiet confused in which topic iam going to do my design project
I have never believed in the Easter Bunny, Santa Claus, or that creepy Tooth Fairy thing.
But that doesn’t mean that I haven’t nurtured other baseless, nutty beliefs until some painful paroxysm jolted me awake.
Many years ago, under horrible personal circumstances, I endured the same spiritual upheaval you’re feeling right now. Just as with you, my [...]
what is ac 1,ac 2 & ac 3 duty cycle
