Can u explain me type of dished end used for small tanks of pressure vessels. Explain the procedure to fabricate dished end by step by step. Is there any reference for preparing dished end. Please send me the same
Monthly Archives: April 2010
Car Body
Pls help me with any websites or ebooks which explains BIW (body in white) structure
and design<
i want to know more about the sill side panel (panel used to strenghten in the bottom of front and back door) pls guide me
Rubber Shore Hardness
Is there a real difference between the properties of rubber of having the hardness value 40 shore 'A' and rubber having the hardness value 50-55 shore 'A'.
My requirement is 40 shore 'A' rubber, but the available is 50-55 shore 'A' rubber. Can I go with 50-55 shore 'A' rubber? Please advise
A Lamborghini Yacht Would Be The Perfect Playmate This (Italian) Summer [Yachts]
Hey it's summer, what better excuse do we need for posting three yachts in one week? Especially when one of them has been styled after Lamborghini's sportscars, taking the angle of the chassis and creating a 15m long waterbeast. More »
Little Shiny Bits
How about a little trivia for your Thursday? I tend to pick up interesting “factoids”, and I’m not usually particular about the subject matter. I’m like a crow, picking up shiny little bits to take back to my nest. There’s something satisfying about little bits of information.
Starting at about $1,000 US, you can have some of your cremated remains blasted into space, either into orbit around the Earth, to the Moon, or shot into deep space.
Many scientists believe the Stradivarius violins have a purer tone because the wood used in making them was denser because of the Maunder Minimum ca 1645-1750. That’s a period of low sun spot activity believed to be associated with colder temperatures on Earth.
More than 50 trillion ( that’s 50,000,000,000,000) solar neutrinos pass through your body every second. There’s no place you can go to get away from them, they can pass through miles of lead. That’s not the cool part; some scientists believe they can also pass through time.
The Earth is moving at about 66,700 mph as it travels around the Sun.
On the average, a meteorite strikes a human about once every 9,300 years.
A potentially disastrous meteorite strike occurs on Earth about every 100,000 years. We’re overdue.
The largest meteorite (still intact) found on Earth is the Hoba meteorite in Nambia, Africa. It was found in 1920, and weighs about 60,000 kg. It crashed about 80,000 years ago.
Some of the largest asteroids have their own moons. The asteroid Ida was the first discovered to have a moon, Dactyl. You just HAVE to see that:
The International Space Station has been continuously occupied since the first crew boarded, November 2, 2000.
The coldest temperature ever recorded on Earth was at Vostok Station in Antarctica (remember Lake Vostok? Exobio?), -126.9 Fahrenheit.
The air temperature around a bolt of lightning is about 30,000 Celsius. That’s about 5 times hotter than the surface of the Sun.
Had enough? Okay, here’s a neat one for you: The word “Google” comes from the term “googol”, which is a number 1 followed by 100 zeros. I’m not going to write that out, but if you REALLY want to see it, I’ll put it in the comments.
I’d be interested in hearing any factoids you’ve found interesting (blog-related, of course), or science-related trivia questions. I’m insatiable.
Generation Voltage for Wind Turbine
Does anyone knows why most of the manufacturers of wind turbines selects the generation voltage of 690 volts? Why it is not common as system voltage (400/415 Volts)?
Required details of kits suitable for testing needs
laboratory tests on :metals, ceramics, polymers and composites
investigation of viscosity, Reynolds'number for pipeline flow and the measurement of drag forces on bluff bodies.
analysis of flow, heat exchange performance and products of combustion.
investigation of the properties of
PS3 Owners Can Sign Up For Live Major League Baseball—For A Hefty Price [Playstation3]
It's not just 3D gaming that the PS3 will be offering soon. Major League Baseball will apparently be streamed live to consoles by the end of this week, but if you've got grand ideas of free baseball, think again. More »
Power factor for Induction Generator
In wind turbines, induction generator is used to produce electricity from wind. These generator is directly connected to grid supply.
Can anybody tell whether the power factor for induction generator is lagging or leading? If it is leading, why wind turbine manufacturers uses capacitor pane
Busbar sizing
Hi all
I would like to know how to size busbar with the following parameters.
The busbar is required for a transformer secondary to feed to the distribution board.
transformer is 3 phase 2MVA 11kV/.400 with powerfactor of 0.95. Impedance rating is 7.5%. Therefore the primary current i
Practical database design
Can anybody tell how to design a database in Postgresql i.e., using opensource..... !!!!!!
Vodafone Ad Uses Rube Goldberg Machine to Show Awesomeness of Apps [Video]
I do love a good Rube Goldberg Machine example. While not as grand in scale as OK Go's, Vodafone Italy's commercial looks like it was insanely fun putting together—all those smartphones, in one room! Working together! Amazing. More »
This Planet Tastes Funny, According to Spitzer

An unusual, methane-free world is partially eclipsed by its star in this artist's concept.
NASA's Spitzer Space Telescope has discovered something odd about a distant planet -- it lacks methane, an ingredient common to many of the planets in our solar system.
"It's a big puzzle," said Kevin Stevenson, a planetary sciences graduate student at the University of Central Florida in Orlando, lead author of a study appearing tomorrow, April 22 in the journal Nature. "Models tell us that the carbon in this planet should be in the form of methane. Theorists are going to be quite busy trying to figure this one out."
The discovery brings astronomers one step closer to probing the atmospheres of distant planets the size of Earth. The methane-free planet, called GJ 436b, is about the size of Neptune, making it the smallest distant planet that any telescope has successfully "tasted," or analyzed. Eventually, a larger space telescope could use the same kind of technique to search smaller, Earth-like worlds for methane and other chemical signs of life, such as water, oxygen and carbon dioxide.
"Ultimately, we want to find biosignatures on a small, rocky world. Oxygen, especially with even a little methane, would tell us that we humans might not be alone," said Stevenson.
"In this case, we expected to find methane not because of the presence of life, but because of the planet's chemistry. This type of planet should have cooked up methane. It's like dipping bread into beaten eggs, frying it, and getting oatmeal in the end," said Joseph Harrington of the University of Central Florida, the principal investigator of the research.
Methane is present on our life-bearing planet, manufactured primarily by microbes living in cows and soaking in waterlogged rice fields. All of the giant planets in our solar system have methane too, despite their lack of cows. Neptune is blue because of this chemical, which absorbs red light. Methane is a common ingredient of relatively cool bodies, including "failed" stars, which are called brown dwarfs.
In fact, any world with the common atmospheric mix of hydrogen, carbon and oxygen, and a temperature up to 1,000 Kelvin (1,340 degrees Fahrenheit) is expected to have a large amount of methane and a small amount of carbon monoxide. The carbon should "prefer" to be in the form of methane at these temperatures.
At 800 Kelvin (or 980 degrees Fahrenheit), GJ 436b is supposed to have abundant methane and little carbon monoxide. Spitzer observations have shown the opposite. The space telescope has captured the planet's light in six infrared wavelengths, showing evidence for carbon monoxide but not methane.
"We're scratching our heads," said Harrington. "But what this does tell us is that there is room for improvement in our models. Now we have actual data on faraway planets that will teach us what's really going on in their atmospheres."
GJ 436b is located 33 light-years away in the constellation Leo, the Lion. It rides in a tight, 2.64-day orbit around its small star, an "M-dwarf" much cooler than our sun. The planet transits, or crosses in front of, its star as viewed from Earth.
Spitzer was able to detect the faint glow of GJ 436b by watching it slip behind its star, an event called a secondary eclipse. As the planet disappears, the total light observed from the star system drops -- this drop is then measured to find the brightness of the planet at various wavelengths. The technique, first pioneered by Spitzer in 2005, has since been used to measure atmospheric components of several Jupiter-sized exoplanets, the so-called "hot Jupiters," and now the Neptune-sized GJ 436b.
"The Spitzer technique is being pushed to smaller, cooler planets more like our Earth than the previously studied hot Jupiters," said Charles Beichman, director of NASA's Exoplanet Science Institute at NASA's Jet Propulsion Laboratory and the California Institute of Technology, both in Pasadena, Calif. "In coming years, we can expect that a space telescope could characterize the atmosphere of a rocky planet a few times the size of the Earth. Such a planet might show signposts of life."
This research was performed before Spitzer ran out of its liquid coolant in May 2009, officially beginning its "warm" mission.
Other authors include: Sarah Nymeyer, William C. Bowman, Ryan A. Hardy and Nate B. Lust from the University of Central Florida; Nikku Madhusudhan and Sara Seager of the Massachusetts Institute of Technology, Cambridge; Drake Deming of NASA's Goddard Space Flight Center, Greenbelt, Md.; and Emily Rauscher of Columbia University, New York.
JPL manages the Spitzer Space Telescope mission for NASA's Science Mission Directorate, Washington. Science operations are conducted at the Spitzer Science Center at Caltech. Caltech manages JPL for NASA. For more information about Spitzer, visit http://www.spitzer.caltech.edu/spitzer and http://www.nasa.gov/spitzer.
- Touch the Earth to Display at Earth Day on Nationa...
- JPL Marks Earth's Big Day
- NASA's New Eye on the Sun Delivers Stunning First ...
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Samsung Leaks ARM’s Roadmap For Next Three Years [Processors]
Thanks to Samsung leaking a document, we now have details about ARM's roadmap for the next three years. It's not the best leak of the decade (or even the century), but helloooo 2013's Aquila, the 1.2GHz quad-core Cortex-A9. More »
Touch the Earth to Display at Earth Day on National Mall

Touch the Earth takes a multimedia approach to teach middle school students about the Earth's biomes – areas on Earth with similar climate, soil and vegetation - using sound and visual aids, tactile and colored graphics, large print and Braille. It was developed for Blind and Deaf users as well as students who learn best with a multimedia approach. Published with the support of NASA Headquarters' Office of Earth Science, Education programs, the book was developed by Elissa Levine, a soil scientist who recently retired from the Biospheric Sciences Branch at NASA's Goddard Space Flight Center, Greenbelt, Md., science writer Amy Hansen, tactile graphic creator, Noreen Grice, geographer, Asad Ullah, and producer, Izolda Traktenberg.
"Much of the Earth science that we do at NASA uses remote sensing, which means measuring something about an object without actually being in contact with it. This book brings home the importance of being able to 'touch the Earth' in some way or another," said Eric Brown de Colstoun, Coordinator of Earth Science Education and Public Outreach at Goddard. "This message should resonate strongly with all audiences, including the visually and hearing challenged, on this 40th anniversary of Earth Day."
The book will be on display at the "NASA Village" along with two supplemental DVDs explaining more about the biomes on each continent. One DVD enhances the book's content with pictures and a signing avatar using American Sign Language to help students who are deaf and hearing impaired. The second DVD has the same enhanced content with pictures, voice and music.
"In a way this book should be exciting for a broader audience that hasn't been reached before, whether the children are blind, deaf, or just want other kinds of tools for learning," remarked Hansen. "Hopefully it will give the kids a chance to better understand Earth's biomes and how all systems on the Earth function together."
Visitors to the Earth Day Celebration will be able to view the Earth's continents in tactile graphics, Braille, and color imagery on a full-size poster - another supplementary educational aid included with each copy of Touch the Earth. The book also includes guidance for teachers on how to incorporate its content into National Science Education standards and provides resources for additional information.
"I hope people will touch it and understand the interactive quality of it," Hansen said. "People don't realize how much of the Sahara takes up Africa," she said of a biome description. "I think it's more dramatic to feel that it's almost a third of the continent."
Touch the Earth is the latest in a series of tactile books on NASA science topics including Touch the Universe and Touch the Sun. Individuals can order a copy of the Touch the Earth tactile book from the National Federation of the Blind Independence Market: http://www.nfb.org/nfb/Independence_Market.asp
For more information and a schedule of NASA's Earth Day activities, visit: http://www.nasa.gov/earthday
View my blog's last three great articles...
- JPL Marks Earth's Big Day
- NASA's New Eye on the Sun Delivers Stunning First ...
- Flight Control Technology Enters Hall of Fame
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JPL Marks Earth’s Big Day

This color image of the Earth was obtained by Galileo on Dec. 11, 1990. Image credit: NASA/JPL
› Full image and caption
The need to understand the planet we call home has never been greater. As the population of our pale blue dot continues to grow, humans and all living things vie for an ever-shrinking pool of natural resources. Fresh water. Clean air. Food. Habitable land. As Earth's climate changes in response to human and natural causes, these resources are strained.
NASA's contingent of dedicated Earth scientists and engineers -- the world's largest -- together with its armada of Earth satellites and airborne instruments, study all aspects of the Earth system--its ocean, atmosphere, ice, land and biosphere. Together, this conflux of humans and machines is advancing our scientific understanding of our ever-changing Earth system, helping to meet the needs of society.
JPL studies help us identify how Earth's climate is changing, understand the causes of these changes, and support development of models used to predict future global change. Currently, JPL has six dedicated Earth science spacecraft in orbit, with another five instruments flying aboard NASA's Terra, Aqua and Aura spacecraft. Several more missions are planned for launch in the next few years. Decision makers around the world use JPL Earth science data to support policy-making and resource management decisions.
- NASA's New Eye on the Sun Delivers Stunning First ...
- Flight Control Technology Enters Hall of Fame
- Helicopter Helps Test Radar for 2012 Mars Landing
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NASA’s New Eye on the Sun Delivers Stunning First Images
Some of the images from the spacecraft show never-before-seen detail of material streaming outward and away from sunspots. Others show extreme close-ups of activity on the sun’s surface. The spacecraft also has made the first high-resolution measurements of solar flares in a broad range of extreme ultraviolet wavelengths.
"These initial images show a dynamic sun that I had never seen in more than 40 years of solar research,” said Richard Fisher, director of the Heliophysics Division at NASA Headquarters in Washington. "SDO will change our understanding of the sun and its processes, which affect our lives and society. This mission will have a huge impact on science, similar to the impact of the Hubble Space Telescope on modern astrophysics.”
Launched on Feb. 11, 2010, SDO is the most advanced spacecraft ever designed to study the sun. During its five-year mission, it will examine the sun's magnetic field and also provide a better understanding of the role the sun plays in Earth's atmospheric chemistry and climate. Since launch, engineers have been conducting testing and verification of the spacecraft’s components. Now fully operational, SDO will provide images with clarity 10 times better than high-definition television and will return more comprehensive science data faster than any other solar observing spacecraft
SDO will provide critical data that will improve the ability to predict these space weather events. NASA's Goddard Space Flight Center in Greenbelt, Md., built, operates and manages the SDO spacecraft for the agency’s Science Mission Directorate in Washington.
“I’m so proud of our brilliant work force at Goddard, which is rewriting science textbooks once again.” said Sen. Barbara Mikulski, D-Md., chairwoman of the Commerce, Justice and Science Appropriations Subcommittee that funds NASA. “This time Goddard is shedding new light on our closest star, the sun, discovering new information about powerful solar flares that affect us here on Earth by damaging communication satellites and temporarily knocking out power grids. Better data means more accurate solar storm warnings.”
The Helioseismic and Magnetic Imager maps solar magnetic fields and looks beneath the sun’s opaque surface. The experiment will decipher the physics of the sun’s activity, taking pictures in several very narrow bands of visible light. Scientists will be able to make ultrasound images of the sun and study active regions in a way similar to watching sand shift in a desert dune. The instrument’s principal investigator is Phil Scherrer of Stanford University. HMI was built by a collaboration of Stanford University and the Lockheed Martin Solar and Astrophysics Laboratory in Palo Alto, Calif.
The Atmospheric Imaging Assembly is a group of four telescopes designed to photograph the sun’s surface and atmosphere. The instrument covers 10 different wavelength bands, or colors, selected to reveal key aspects of solar activity. These types of images will show details never seen before by scientists. The principal investigator is Alan Title of the Lockheed Martin Solar and Astrophysics Laboratory, which built the instrument.
The Extreme Ultraviolet Variability Experiment measures fluctuations in the sun’s radiant emissions. These emissions have a direct and powerful effect on Earth’s upper atmosphere -- heating it, puffing it up, and breaking apart atoms and molecules. Researchers don’t know how fast the sun can vary at many of these wavelengths, so they expect to make discoveries about flare events. The principal investigator is Tom Woods of the Laboratory for Atmospheric and Space Physics at the University of Colorado, Boulder. LASP built the instrument.
"These amazing images, which show our dynamic sun in a new level of detail, are only the beginning of SDO's contribution to our understanding of the sun," said SDO Project Scientist Dean Pesnell of Goddard.
SDO is the first mission of NASA's Living with a Star Program, or LWS, and the crown jewel in a fleet of NASA missions that study our sun and space environment. The goal of LWS is to develop the scientific understanding necessary to address those aspects of the connected sun-Earth system that directly affect our lives and society.
View my blog's last three great articles...
- NASA's New Eye on the Sun Delivers Stunning First ...
- Flight Control Technology Enters Hall of Fame
- Helicopter Helps Test Radar for 2012 Mars Landing
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Who Thought Cloning a Sony Vaio P Was a Good Idea? [NetBooks]
Gundam Cafe Opens In Akihabara [Japan]
There's no place more fitting for an official Gundam Cafe than in Tokyo's Akihabara district. Sadly Japanese maids don't draw hearts in syrup over your pancakes or put "love spells" on you like at Maid Cafes...but there are Gundam biscuits! More »
Tissue Engineered Skin Progresses
Spanish scientists "have generated artificial human skin by [tissue] engineering based on agarose-fibrin biomaterial. The artificial skin was grafted onto mice, and optimal development, maturation and functionality results were obtained. This pioneering finding will allow the clinical use of human skin and its use in many laboratory tests on biological tissues - which, additionally, would avoid the use of laboratory animals. Further, this finding could be useful in developing new treatment approaches for dermatological pathologies. ... The skin created in the laboratory showed adequate biocompatibility rates with the recipient and no rejection, dehiscence or infection was registered. ... The experiment [is] the first to create artificial human skin with a dermis made of fibrin-agarose biomaterial. To this date, artificial skin substitutes were elaborated with other biomaterials as collagen, fibrin, polyglycolic acid, chitosan, etc. These biomaterials [added] resistance, firmness and elasticity to the skin. ... Definitively, we have created a more stable skin with similar functionality to normal human skin."
View the Article Under Discussion: http://www.medicalnewstoday.com/articles/186185.php
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