My further studies.

Posted on by

Dear sir,

I had done Diploma in Mechanical Engineering. Due to financial problems, icant studied further. But i am interested in studies. I am working in small company. What is the best education for me in the technical field.

Please guide me

Dished types and fabrication procedure

Posted on by

Dear Sir,

We are preparing dished end but there are some problems in formation of dished ends. There are some indents found during formation of dished end. Please tell me how to form dished without getting indents of pressing. We are forming dished end from Blank. Please tell me step by step pr

Car Body

Posted on by

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

Posted on by

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

Little Shiny Bits

Posted on by

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.

Candid Pic of Marian

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.

AMANDA-II map of Northern Hemisphere neutrino sky

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.

Hoba Meteorite - Image: Basilicofresco (Flickr) some rights reserved

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:

Ida and her moon, Dactyl - Image NASA/JPL, taken by Galileo on 082893

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.

This makes a nice wallpaper if you need a new one.

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.

Power factor for Induction Generator

Posted on by

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

Posted on by

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

This Planet Tastes Funny, According to Spitzer

Posted on by
Artist's concept of a methane-free planet
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.

View my blog's last three great articles...

View this site auto transport car shipping car transport business VoIP business class flights

JPL Marks Earth’s Big Day

Posted on by
Earth - South America
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.

View my blog's last three great articles...

View this site auto transport car shipping car transport business VoIP business class flights