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Virtual Fence Could Modernize the Old West
Hugh Pickens writes "For more than a century, ranchers in the West have kept cattle in place with fences of barbed wire, split wood and, more recently, electrified wires. Now animal science researchers with the Department of Agriculture, is working on a system that will allow cowboys to herd their cattle remotely via radio by singing commands and whispering into their ears and tracking movements by satellite and computer. A video of Dean Anderson, a researcher at the USDA's Jornada Experimental Range at Las Cruces, NM., shows how he has built radios that attach to an animal's head that allow a person at the other end to issue a range of commands — gentle singing, sharp commands, or a buzz like a bee or snake — to get the cattle to move where one wants them to. Anderson says it would cost $900 today to put a radio device on one head of cattle, but he says costs will fall and the entire herd wouldn't have to be outfitted, just the "leaders." Much of the research has focused on how cattlemen can identify which cattle in their herds are the ones that the others follow."
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Spacecraft Buzzes By Mercury
Riding with Robots writes "The robotic spacecraft MESSENGER is making its second fly-by of the first planet today, skimming just 200 kilometers above the surface. The fly-by will reveal portions of the planet that have never been seen before, but the main purpose of the maneuver is to prepare for an orbital insertion in 2011. The mission site offers extensive information, along with the first pictures that are already arriving on Earth, with many more expected in the coming hours and days."
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Senate Votes To Empower Parents As Censors
unlametheweak recommends an Ars Technica report that the US Senate has unanimously passed a bill requiring the FCC to explore what "advanced blocking technologies" are available to parents to help filter out "indecent or objectionable programming." "...the law does focus on empowering parents to take control of new media technologies to deal with undesired content, rather than handing the job over to the government. It asks the FCC to focus the inquiry on blocking systems for a 'wide variety of distribution platforms,' including wireless and Internet, and an array of devices, including DVD players, set top boxes, and wireless applications."
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Plug-In Hybrids Aren't Coming, They're Here
Wired is running a story about the small but vocal, and growing, number of people who aren't waiting for automakers to deliver plug-in hybrids. They're shelling out big money to have already thrifty cars converted into full-on plug-in hybrids capable of triple-digit fuel economy. "The conversions aren't cheap, and top-of-the-line kits with lithium-ion batteries can set you back as much as $35,000. Even a kit with lead-acid batteries — the type under the hood of the car you drive now — starts at five grand. That explains why most converted plug-ins are in the motor pools of places like Southern California Edison... No more than 150 or so belong to people like [extreme skiing champion Alison] Gannett, who had her $30,000 Ford Escape converted in December. Yes, that's right. The conversion cost more than the truck."
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No Naked Black Holes
Science News reports on a paper to be published in Physical Review Letters in which an international team of researchers describes their computer simulation of the most violent collision imaginable: two black holes colliding head-on at nearly light-speed. Even in this extreme scenario, Roger Penrose's weak cosmic censorship hypothesis seems to hold — the resulting black hole (after the gravitational waves have died down) retains its event horizon. "Mathematically, 'naked' singularities, or those without event horizons, can exist, but physicists wouldn't know what to make of them. All known mechanisms for the formation of singularities also create an event horizon, and Penrose conjectured that there must be some physical principle — a 'cosmic censor' — that forbids singularity nakedness..."
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