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Nanotubes. For centuries, people knew pure carbon in two forms, diamond and graphite. Diamond is three-dimensional matrix of carbon atoms in which each atom is bonded to four others in a tetrahedral arrangement. Graphite on the other

Автор: maymmeplY от 17-12-2011, 11:01

The ring in a strong, steady breeze. Nanotube powder is incredibly light and fluffy! This sample is a pile about half an inch wide the way it's stacked in the photo, but it weighs only about 7mg (0. 007 grams). A full liter of this stuff would weight only about 25 grams, 40 times less dense than water.

Note that this stuff is extremely black. Really, ...

Bright Now Vitamin C

Автор: Bradleykabs от 15-12-2011, 02:23
Bright Now Vitamin C

We are nr. Com, Numerical Recipes Software. We are one of the oldest continuously operating sites on the Web, dating back to 1993 when there were only about 25,000 domains in the Internet. (Today, that number is about 200,000,000. ) In partnership with Cambridge University Press, we develop the Numerical Recipes series of books on scientific computing and related software products. We're now on Facebook as.

Give us a "like" or make a post and you might get a free NR3 ebook lifetime subscription! (This is not an official contest -- we're just feeling Facebook-friendly. ) Check regularly to see if you're a winner. Numerical Recipes in Java! High-quality translations of our version 3. 04 C++ code have been contributed by a Numerical Recipes user.

They are available to all other licensed Numerical Recipes users. You can call Numerical Recipes routines (along with any other C++ code) from Python. A tutorial with examples is. A free inter...

Weather Extremes

Автор: lkgdggobzu от 1-12-2011, 23:02
Weather Extremes

Warmest Places in the World: Average Annual Temperature There are many sources detailing what the hottest places in the world are so far as all-time maximum observed temperatures have been, including and Maximiliano Hererras. However, no one has yet detailed what the warmest overall sites in the world are in terms of highest average annual temperature. Here is a list of such researched by climatologist Maximiliano Hererra and covering each continent and also a collection of significant sub regions. NOTES ABOUT THE DATA The average annual temperatures may vary slightly according to how they are calculated and also in which way the daily average temperatures are calculated (metadata, min/max divided by 2, etc. .

). Obviously they also vary according to the periods of record (PORs). An effort has been