Mad science News, Videos, Reviews and Gossip - io9 About 60 years late to the party on dreaming that one up, friend. :-) in short...solar power is inefficient, and electrolysis of water to create hydrogen is energy intensive, which means it wastes a lot of energy to create that hydrogen to be used as an energy source. IIRC electrolysis is at best 50% energy efficient, with solar being 20% efficient at converting sunlight to electricity, which has a decent, but low yield in the first place. A meter square of solar cells intercepts ~1200 watts of power. Fuel cells convert something like 60% of stored energy into actual mechanical, lets get this thing moving energy...so we're down to 19.2W of energy used via hydrogen fuel cells filled using every square meter of solar cells we use. We could do it, but as you can see we lose a lot of energy in the process.
Scientist creates lifelike cells out of metal Scientists trying to create artificial life generally work under the assumption that life must be carbon-based, but what if a living thing could be made from another element? One British researcher may have proven that theory, potentially rewriting the book of life. Lee Cronin of the University of Glasgow has created lifelike cells from metal — a feat few believed feasible. The discovery opens the door to the possibility that there may be life forms in the universe not based on carbon, reports New Scientist. Even more remarkable, Cronin has hinted that the metal-based cells may be replicating themselves and evolving. "I am 100 percent positive that we can get evolution to work outside organic biology," he said. The high-functioning "cells" that Cronin has built are constructed from large polyoxometalates derived from a range of metal atoms, like tungsten. The metallic bubbles are certainly cell-like, but are they actually alive? The early results have been encouraging.
The Elements by Theodore Gray My book The Elements is based on photographs I've been collecting at my website periodictable.com for many years. The website includes not just pictures, but also more detailed descriptions than we could fit in the book, and most importantly, it includes full 360-degree rotating videos of almost all the objects. You really won't find this kind of resources anywhere else for any other subject, so please enjoy. If you don't have the book yet, please don't think this is page is a substitute for the real thing. For the convenience of people who have the book, I've listed all the samples found on each page in the book, so you can easy look them up. Click on a page icon below to get a list of the samples on that page. Sort pages: By Atomic Number | Alphabetically | Text Listing
Stem Cell Basics: Introduction Laboratory studies of stem cells enable scientists to learn about the cells’ essential properties and what makes them different from specialized cell types. Scientists are already using stem cells in the laboratory to screen new drugs and to develop model systems to study normal growth and identify the causes of birth defects. Brain Scanner Records Dreams on Video Just a few weeks ago, we posted about how brain patterns can reveal almost exactly what you're thinking. Now, researchers at UC Berkeley have figured out how to extract what you're picturing inside your head, and they can play it back on video. The way this works is very similar to the mind-reading technique that we covered earlier this month. A functional MRI (fMRI) machine watches the patterns that appear in people's brains as they watch a movie, and then correlates those patterns with the image on the screen. With this database in place, the Berkeley research group was then able to feed brain scans into their computer model, which would go pick out the 100 video clips that most closely matched the brain pattern on a second-by-second basis. Comparing the brain-scan video to the original video is just a way to prove that the system works, but there's nothing stopping this technique from being used to suck video out of people's heads directly. Berkeley, via SciAm and io9
Principles behind the Agile Manifesto We follow these principles: Our highest priority is to satisfy the customer through early and continuous delivery of valuable software. Welcome changing requirements, even late in development. Deliver working software frequently, from a couple of weeks to a couple of months, with a preference to the shorter timescale. Business people and developers must work together daily throughout the project. Build projects around motivated individuals. The most efficient and effective method of conveying information to and within a development team is face-to-face conversation. Working software is the primary measure of progress. Agile processes promote sustainable development. Continuous attention to technical excellence and good design enhances agility. Simplicity--the art of maximizing the amount of work not done--is essential. The best architectures, requirements, and designs emerge from self-organizing teams. Return to Manifesto
Video: A Trillion-Frame-Per-Second Camera Captures Individual Photons Moving Through Space Here at PopSci we love super-fast cameras and super slow-mo video, so you can imagine our glee when we heard that MIT researchers have built a camera with a visual capture rate of one trillion frames per second. That's fast enough to watch photons travel the length of a one-liter bottle in the video below. In other words, absolutely nothing in the universe looks fast to this camera. But it's not so simple as pressing "record." The rig is built as a "streak camera," a fairly new innovation in which the aperture of the camera is a narrow slit. Photons enter through the slit and are turned roughly 90 degrees by an electric field, sending them off in a direction perpendicular to the slit. The result is a frame captured very quickly, but it is only one-dimensional, at least from a spatial standpoint. So how do they produce the 2-D video below? [MIT News]
Manifesto for Agile Software Development Chemistry News, Videos, Reviews and Gossip - io9 Interesting — when I was in the Army, it was called CBR (chemical, biological, radioactive). I wonder why they changed the order and the initials? Pressure from Jay Leno? NBC was for Nuclear, Biological, Radiological. I think it might have been for memory's sake, which might have something to do with the tv studio indeed - but maybe just for giggles. When were you in? I was in back in the late 70s. I remember atropine was one of the drugs that was used to treat the immediate effects of nerve gas exposure. And we're supposed to believe that our benevolent government has truly decided to destroy all our VX stockpiles. I dunno, we've got much more targeted, devastating methods of wiping ourselves off the planet these days. I was in in the 90's. The husband, Mr.