Updated: 2010-06-29 14:48:23
Physics Today News Picks A blog of hand-picked science news from the staff of Physics Today Home Print edition Advertising Buyers Guide Jobs Events calendar Preprogrammed self-folding origami News Picks home Human-powered embedded electronics By Physics Today on June 29, 2010 10:48 AM No Comments No TrackBacks Smithsonian Sensor-studded clothing , a Band-Aid-sized electrocardiogram machine , and computer screens in contact lenses such miniature embedded electronics may one day be possible , provided the right power supply can be developed . As Michael Belfiore explains in the August issue of Smithsonian magazine , current batteries are too bulky for those applications . Researchers at MIT are therefore working to harvest thermal and kinetic energy from the human body , which they hope can
Updated: 2010-06-29 14:35:50
Nature: Nitinol is an alloy of nickel and titanium that "remembers" a previous shape when heated. Harvard's Robert Wood has incorporated tiny nitinol-based hinges into flat, pre-sectioned sheets of a glass fiber composite. When electricity is sent through the hinges, they warm up and fold the sheet into a boat, airplane, or other preprogrammed origami object.
Updated: 2010-06-29 13:28:04
New York Times: Some harmful chemicals find their way from the environment into honey via flower pollen. Given that bees normally forage within a range of about 5 km, analyzing honey for toxins is a cost-effective way to monitor local pollution—which is just what authorities at Düsseldorf International Airport in Germany have been doing for the past four years.
Updated: 2010-06-29 10:10:56
Nd:YVO4 is commonly used as an active laser medium for DPSSL. It comes as a transparent blue-tinted material. It is birefringent, therefore rods made of it are usually rectangular.
Updated: 2010-06-29 10:10:48
Nd:YAG is the most widely used active laser medium in solid-state lasers. It can be used in lasers utilizing frequency doubling and frequency tripling, and high-energy Q-switching.
Updated: 2010-06-29 10:10:35
KTA is an excellent NLO crystal developed mainly for Optical Parametric Oscillation (OPO)
Updated: 2010-06-29 10:08:23
β-BBO is a crystal used for frequency mixing and other nonlinear optics applications.
Updated: 2010-06-29 10:07:50
Cr:YAG can be used for passive Q-switching the diode or lamp pumped Nd:YAG, Nd:YLF, Nd:YVO4, Yb:YAG, and other neodymium and yttrium doped lasers at wavelengths between 1000-1200nm.
Updated: 2010-06-29 10:07:44
Cobolt AB announces the release of a new wavelength on the ground breaking single-frequency 05-01 platform released in 2009.
Updated: 2010-06-29 00:00:00
Conference: 16 Dec 2010 - 18 Dec 2010, Chennai, India. Organized by SRM University (Chennai), Springer.
Updated: 2010-06-28 14:21:13
Nature: Generating electricity from natural gas emits half as much carbon dioxide per joule as generating electricity from coal. According to a newly released MIT study, the US has reserves of 60 trillion cubic meters of natural gas, the world's third largest and enough to supply US electricity needs for 92 years. For generating electricity, coal is cheaper than natural gas, but that cost advantage would be reversed if CO2 emission were factored in, the report says.
Updated: 2010-06-25 15:16:21
Nature: This week the world's oldest scientific society still in existence, Britain's Royal Society, is throwing parties, staging TV debates, holding public lectures, and otherwise celebrating its 350th birthday. In a news feature, Nature's Colin Macilwain examines how the society has changed from the age of Isaac Newton to the age of Stephen Hawking.
Updated: 2010-06-25 15:08:25
New York Times: Speech recognition software is now capable of handling routine conversations at doctors' offices and basic interrogations at military checkpoints—even in foreign languages. Steve Lohr and John Markoff of the New York Times survey recent progress toward creating artificial intelligence that can interpret and act on human speech.
Updated: 2010-06-24 21:09:19
Physics Today News Picks A blog of hand-picked science news from the staff of Physics Today Home Print edition Advertising Buyers Guide Jobs Events calendar Positron emission tomography could provide early detection of Alzheimer's News Picks home How to bend a soccer ball past defenders and into the net By Physics Today on June 24, 2010 5:09 PM No Comments No TrackBacks Physics Today In today's World Cup match between Denmark and , Japan Japan's Keisuke Honda curled a free kick over a wall of defenders past the outstretched hand of Danish goalkeeper Thomas Sorensen and into the net . Honda's goal demonstrated how soccer players can alter the ball's trajectory by exploiting the Magnus effect . In an article in the July issue of Physics Today , John Eric Goff , a physics professor at
Updated: 2010-06-24 14:55:48
BBC: Israel has successfully launched the ninth in its series of Ofek spy satellites. Ofek-9 was carried aloft aboard a Shavit rocket that took off on Tuesday from Palmachim Airbase. The secret payload is believed to contain a camera that can resolve structures on the ground as small as half a meter.
Updated: 2010-06-24 14:37:42
San Francisco Chronicle: San Francisco's city council—its Board of Supervisors—voted on Tuesday to approve a new regulation that governs the sale of cell phones. If city mayor Gavin Newsom signs the law, shops that sell cell phones will have to disclose how many watts per kilogram of body tissue each type of phone emits. The Federal Communications Commission limits that emission measure, known as the specific absorption rate (SAR), to 1.6 W/kg, but does not require device manufacturers to disclose SAR values to customers.
Updated: 2010-06-09 19:04:26
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Updated: 2010-06-07 19:37:15
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Updated: 2010-06-07 03:33:00
Graphene, a carbon sheet that is one-atom thick, appears to be at the center of the next revolution in material science. These ultrathin sheets hold great potential for a variety of applications from replacing silicon in solar cells to cooling computer chips. Despite its vast promise, graphene and its derivatives "are materials people understand little about," said Vivek Shenoy, professor of engineering at Brown University. "The more we can understand their properties, the more (technological) possibilities that will be opened to us"........
