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Earth

Concrete That Purifies the Air 88

fergus07 writes "Although much of the focus of pollution from automobiles centers on carbon emissions, there are other airborne nasties spewing from the tailpipes of fossil fuel-powered vehicles. These include nitrogen oxides (NOx). In the form of nitrogen dioxide it reacts with chemicals produced by sunlight to form nitric acid – a major constituent of acid rain – and also reacts with sunlight, leading to the formation of ozone and smog. Everyone is exposed to small amounts of nitrogen oxides in ambient air, but exposure to higher amounts, in areas of heavy traffic for example, can damage respiratory airways. Testing has shown that surfacing roads with air purifying concrete could make a big contribution to local air purity by reducing the concentration of nitrogen oxides by 25 to 45 percent."
Operating Systems

Google Android — a Universe of Incompatible Devices 636

snydeq writes "Galen Gruman writes about the dark side of the recent flood of Android smartphones: versions run amok. 'That flood of options should be a good thing — but it's not. In fact, it's a self-destruction derby in action, as phones come out with different versions of the Android OS, with no clear upgrade strategy for either the operating system or the applications users have installed, and with inconsistent deployment of core features. In short, the Android platform is turning out not to be a platform at all, but merely a starting point for a universe of incompatible devices,' Gruman writes. 'This mess leaves developers and users in an unstable position, as each new Android device adds another variation and compatibility question.' In the end, Google's naive approach to open sourcing Android may in fact be precipitating this free-for-all — one that might ultimately turn off both end-users and developers alike." As reader donberryman points out, you can even put Android onto some Windows Mobile phones, now.
Power

Creating Electric Power From Light Using Gold Nanoparticles 77

cyberfringe writes "Professor of Materials Science Dawn Bonnell and colleagues at the University of Pennsylvania have discovered a way to turn optical radiation into electrical current that could lead to self-powering molecular circuits and efficient data storage. They create surface plasmons that ride the surface of gold nanoparticles on a glass substrate. Surface plasmons were found to increase the efficiency of current production by a factor of four to 20, and with many independent parameters to optimize, enhancement factors could reach into the thousands. 'If the efficiency of the system could be scaled up without any additional, unforeseen limitations, we could conceivably manufacture a 1A, 1V sample the diameter of a human hair and an inch long,' Prof. Bonnell explained. The academic paper was published in the current issue of ACS Nano. (Abstract available for free.) The significance? This may allow the creation of nano-sized circuits that can power themselves through sunlight (or another directed light source). Delivery of power to nanodevices is one of the big challenges in the field."

Comment Re:Design patterns (Score 1) 396

I agree that design patterns are good to know and they are definitely one of the things that you'll get asked in interviews, however, I think there is a bit of obsession with talking about design patterns themselves and not what's really important which is code quality. In short, if your code is written with good code qualities eg. Testable, loosely coupled, cohesive, open to extension/closed to modification etc, then design patterns will emerge naturally. In day-to-day coding you rarely ever have to implement a design pattern, most places where you need actually need a named design pattern there is already an implementation available, but your code should always have good code qualities. I work with lots of smart people who can talk about design patterns all day, yet often I find myself needing to modify others code, and not only are there no unit tests, (so I don't know if I'm breaking anything), but also there are often a lot of internalized dependencies that make unit testing or refactoring much more difficult than need be.

Comment Fundamental CS, algorithms etc. (Score 1) 396

Self taught also, Mechanical Engineer by training. I've found my biggest gap to be fundamental CS stuff, I'm currently working my way through a book on algorithms: http://www.amazon.com/Introduction-Algorithms-Third-Thomas-Cormen/dp/0262033844/ref=sr_1_1?ie=UTF8&s=books&qid=1266595707&sr=8-1 While the practical implications of knowing this stuff is limited, it's always good to have a deeper understanding, and it will help if you're ever in an interview with hard core CS types.
Mars

Mars Images Reveal Evidence of Ancient Lakes 128

Matt_dk writes "Spectacular satellite images suggest that Mars was warm enough to sustain lakes three billion years ago, a period that was previously thought to be too cold and arid to sustain water on the surface, according to research published today in the journal Geology. Earlier research had suggested that Mars had a warm and wet early history but that between 4 billion and 3.8 billion years ago, before the Hesperian Epoch, the planet lost most of its atmosphere and became cold and dry. In the new study, the researchers analysed detailed images from NASA’s Mars Reconnaissance Orbiter, which is currently circling the red planet, and concluded that there were later episodes where Mars experienced warm and wet periods."
Space

Big Dipper "Star" Actually a Sextuplet System 88

Theosis sends word that an astronomer at the University of Rochester and his colleagues have made the surprise discovery that Alcor, one of the brightest stars in the Big Dipper, is actually two stars; and it is apparently gravitationally bound to the four-star Mizar system, making the whole group a sextuplet. This would make the Mizar-Alcor sextuplet the second-nearest such system known. The discovery is especially surprising because Alcor is one of the most studied stars in the sky. The Mizar-Alcor system has been involved in many "firsts" in the history of astronomy: "Benedetto Castelli, Galileo's protege and collaborator, first observed with a telescope that Mizar was not a single star in 1617, and Galileo observed it a week after hearing about this from Castelli, and noted it in his notebooks... Those two stars, called Mizar A and Mizar B, together with Alcor, in 1857 became the first binary stars ever photographed through a telescope. In 1890, Mizar A was discovered to itself be a binary, being the first binary to be discovered using spectroscopy. In 1908, spectroscopy revealed that Mizar B was also a pair of stars, making the group the first-known quintuple star system."
Image

NASA Tests Flying Airbag 118

coondoggie writes "NASA is looking to reduce the deadly impact of helicopter crashes on their pilots and passengers with what the agency calls a high-tech honeycomb airbag known as a deployable energy absorber. So in order to test out its technology NASA dropped a small helicopter from a height of 35 feet to see whether its deployable energy absorber, made up of an expandable honeycomb cushion, could handle the stress. The test crash hit the ground at about 54MPH at a 33 degree angle, what NASA called a relatively severe helicopter crash."
Image

Jetman Attempts Intercontinental Flight 140

Last year we ran the story of Yves Rossy and his DIY jetwings. Yves spent $190,000 and countless hours building a set of jet-powered wings which he used to cross the English Channel. Rossy's next goal is to cross the Strait of Gibraltar, from Tangier in Morocco and Tarifa on the southwestern tip of Spain. From the article: "Using a four-cylinder jet pack and carbon fibre wings spanning over 8ft, he will jump out of a plane at 6,500 ft and cruise at 130 mph until he reaches the Spanish coast, when he will parachute to earth." Update 18:57 GMT: mytrip writes: "Yves Rossy took off from Tangiers but five minutes into an expected 15-minute flight he was obliged to ditch into the wind-swept waters."

Comment Re:Sid the Science Kid & Ms. Frizzle (Score 1) 799

Ms. Frizzle rules !!

Seriously, I have 5 year old, and I end up reading him a book from the Magic School Bus series just about every night. The series is great for getting kids interested in science and the content isn't too watered down as many books for kids in this age group are. Also you can expand on the books by showing adding your own material like showing them pictures from the Cassini probe or from the Mars rovers, or talking about any science articles that you have read recently that tie into one of the stories.

The imaginative format of the books really appeals to kids; I'm betting you could do one on special relativity and kids would actually get some understanding of it, even though it's a subject that most adults are afraid to grapple with.

Also "Prehistoric Planet" on PBS is pretty good and has more content than your average "Popumentary" from the Discovery channel.

Comment Re:Takes all kinds (Score 1) 500

I agree and would like to expand on that. Although the human genome is understood how genes are actually activated is largely a mystery. The article tries to mix junk science related to genetics with parenting to tell us what we do or do not know about parenting. As a parent myself I'm very skeptical of most parenting advice from "experts" because it tends to ignore the simple facts that 1) All kids are different 2) All parents are different, so what works for one parent with their kid isn't necessarily going to work the same way for you. Being a parent is a little like being a gardener. You ultimately only have control over about half of the situation. Kids are born with a personality, your job as a parent is to provide an environment where they can learn and grow. As the garden analogy, goes if you start with tomato seed you're going to end up with tomatoes, you might be able to control how, many tomatoes you get and the quality somewhat but your role is to provide good soil and water, nature does the most of the work. I think people want to believe that they can control what their children become entirely and if they don't turn out as planned, then they are failures as parents. They should probably have more articles and how to communicate kids and on what you can learn from the experience as a parent, but that wouldn't sell nearly as many magazines as astrology posing as science.

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