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Biotech

Researchers Harness E. Coli To Produce Propane 82

Rambo Tribble writes A team of British and Finnish scientists have used the common bacteria Escherichia coli to produce the environmentally-friendly fuel propane. By introducing enzymes to modify the bacteria's process for producing cell membranes, they were able directly produce fuel-grade propane. While commercial application is some years off, the process is being hailed as a cheap, sustainable alternative to deriving the gas from fossil fuel production. As researcher Patrik Jones is quoted as saying, "Fossil fuels are a finite resource and...we are going to have to come up with new ways to meet increasing energy demands."
Science

Taking the Ice Bucket Challenge With Liquid Nitrogen 182

Nerval's Lobster writes As a trend, the ALS Ice Bucket Challenge seems a bit played out—who hasn't yet dumped a bucket of icy water over his or her head for charity? But that didn't stop Canadian chemist Muhammad Qureshi from executing his own sublimely scientific, potentially dangerous variation on the theme: After donating to the ALS Association, he proceeded to douse himself with a bucket of liquid nitrogen. Anyone who's taken a chemistry class, or at least watched the end of Terminator 2, knows that liquid nitrogen can rapidly freeze objects, leaving them brittle and prone to shattering. Pouring it on your skin can cause serious frostbite. So what prevented that bucketful of liquid nitrogen from transforming Qureshi into a popsicle? In two words: Leidenfrost effect. Named after 18th century scientist Johann Gottlob Leidenfrost, the effect is when a liquid comes near a mass that's much warmer than the liquid's boiling point, which (in the words of Princeton's helpful physics explainer) results in an insulating vapor layer that "keeps that liquid from boiling rapidly." In other words, the vapor makes the liquid "float" just above the surface of the object, rather than coming into direct contact with it.
United States

Google's Megan Smith Would Be First US CTO Worthy of the Title 117

theodp writes: Bloomberg is reporting that Google X's Megan Smith is the top candidate for U.S. Chief Technology Officer. With a BS/MS in Mechanical Engineering from MIT, and experience ranging from General Magic to Google, Smith would arguably be the first U.S. CTO worthy of the title (the outgoing U.S. CTO has a bachelor's in Econ; his predecessor has a master's in Public Policy). "Smith joined Google in 2003. As vice president of business development, she oversaw many of its most important acquisitions, like Keyhole, the service that underlies Google Earth. She has led the company’s philanthropic division, Google.org, and served as a co-host for Google’s Solve for X forum, where distinguished thinkers and scientists brainstorm radical technology ideas with Google executives."
The Almighty Buck

Indiana University Researchers Get $1 Million Grant To Study Memes 126

An anonymous reader writes with news that the NSF has just awarded a group of researchers a grant to study the life cycle of memes. "Indiana University is receiving nearly $1 million in federal grant money to investigate the genesis, spread, and demise of Internet memes. The grant from the National Science Foundation awards four Indiana researchers $919,917 to for a project called Truthy that will, as the grant's abstract explains, "explore why some ideas cause viral explosions while others are quickly forgotten." (And yes, in case you're wondering, the name was inspired by Stephen Colbert's neologism "truthiness.") The government-funded research is aimed at identifying which memes are organic and which ones are mere astroturf. "While the vast majority of memes arise in a perfectly organic manner, driven by the complex mechanisms of life on the Web, some are engineered by the shady machinery of high-profile congressional campaigns," Truthy's About page explains."
Earth

Climate Scientist Pioneer Talks About the Furture of Geoengineering 140

First time accepted submitter merbs writes At the first major climate engineering conference, Stanford climatologist Ken Caldeira explains how and why we might come to live on a geoengineered planet, how the field is rapidly growing (and why that's dangerous), and what the odds are that humans will try to hijack the Earth's thermostat. From the article: "For years, Dr. Ken Caldeira's interest in planet hacking made him a curious outlier in his field. A highly respected atmospheric scientist, he also describes himself as a 'reluctant advocate' of researching solar geoengineering—that is, large-scale efforts to artificially manage the amount of sunlight entering the atmosphere, in order to cool off the globe."
Earth

Slashdot Asks: How Prepared Are You For an Earthquake? 191

With three earthquakes of some significance in the news this weekend (Chile, California, and Iceland), it seems a good time to ask: If you live in an area of seismic danger, how are you prepared for an earthquake (or tsunami, mudslide, or other associated danger) and how prepared are you? Do you have a stash of emergency supplies, and if so, how did you formulate it? In the U.S. alone, it's surprising how many areas there are with some reasonable chance of earthquakes, though only a few of them are actually famous for it — and those areas are the ones where everything from building codes to cultural awareness helps mitigate the risks. I'm not sure I'd want to be in a skyscraper in Memphis or St. Louis during a replay of the New Madrid quakes of 1811-1812, which is probably worth worrying about for those in the region. Beyond personal safety, do you have a plan for your electronics and data if the earth starts shaking?

Comment Re:Dobsonian (Score 3, Interesting) 187

No. Absolutely not. Alt-az mounts are horrible, especially for beginning astronomers as there is a complete disconnect between the telescope axis and reality. An alt-az mount almost has to be motorized to be useful, and it drives up cost. People hocking dobs love to talk about how cheap the "dollars per inch" of the optics are, but the fail to mention you can look at something under high magnification for a few seconds before it disappears, and then you have to figure out how to track RA with an alt-az mount under high power and find the object again.

There's no better way to get an astronomy newbie to QUIT the hobby than to set them up with a dob.

Comment 4.5" Newtonian on an EQ Mount (Score 5, Insightful) 187

Get a 4.5" or maybe a 6" Newtonian reflector on an EQ mount. Be sure you spend at least 5x on the mount than you do on the Optical Tube. The mount is 80% of the telescope. Do not, I repeat, DO NOT cheap out on a telescope by getting a shitty mount.

The EQ mount need not be motorized nor have a computer - in fact it's nice to learn about the RA/Dec axes and how to dial them in and track objects manually, but an RA motor would be necessary if you want to do any photography. (An RA motor does not necessarily require a full computer rig)

Eyepieces are also important, and pay no attention to "max power" capabilities, as they are always way overstated. A 4.5-6" Newtonian will be best at powers up to but not exceeding about 60-90X. Make sure you get a range of eyepieces to have variable power, but focus on field of view rather than magnification. Field of view is WAY more important than magnification.

The objects you will look at most with a 4.5-6" scope are the moon, planets, and nebulae. Nebulae are really cool, but you'll need the larger apertures to really appreciate them, or the photography setup so you can collect the light.

If you foresee going far with this as a hobby, you will want to go 8-10" at some point. It's better to decide now as telescopes are utterly worthless on the used market.

Hope this helps..

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