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Monday, April 8, 2013
7-Year-Old Boy Fighting Brain Cancer Scores 69-Yard Touchdown
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Sony unveils 30-and 56-inch professional 4K OLED monitor prototypes, shipping in May
The 56-inch OLED TV Sony trotted out at CES may not be headed to the consumer market, but it is becoming a reality, at least in the professional sector. The company announced its A Series Trimaster EL monitors at NAB today, outing a 4,096 x 2,160 30-inch model as well as a 3,840 x 2160 56-inch display. Both panels boast of wide viewing angles and low color shift, promising accurate signal reproduction for industry professionals working with 4K content. No word yet on pricing, but professionals can look forward to upgrading sometime in May 2013. Hit the break for the official press release, item skus, and a quick break down of what products the A series will be replacing.
Filed under: Displays, HD, Sony
Source: http://feeds.engadget.com/~r/weblogsinc/engadget/~3/vivd1Cp-CIk/
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Sunday, April 7, 2013
The Next Don: How VCs Plan For The Future
We all remember the last scene in The Godfather, where Michael Corleone is depicted as the next Don, taking over the role from his father as the figurehead of the mafioso Corleone family. As a viewer, we are partly left with a sense of relief -- finally, Don Corleone's wishes for his dynasty to carry on through his son will come true, Michael Corleone has finally accepted his destiny as a mob boss, and the infamous Corleone family will live on for another generation. Horsehead-in-the-bed behavior aside, the way that VC firms groom their talent isn?t all that different from how the older Corleone groomed his sons.Source: http://feedproxy.google.com/~r/Techcrunch/~3/6565HVJw2FA/
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World?s Largest Solar Thermal Power Plant In Mojave Desert, California
By Carl Jackers
Posted: 04/5/2013 - 9:37 pm PDT | Last Updated: 04/5/2013 - 9:37 pm PDT ????? 0 CommentsThe world?s largest solar thermal power plant is in Mojave Desert, California.
? Location : Mojave Desert, California
? Capacity : 377 Megawatts (MW)
? It will power 140,000 houses.
? Completion Date : 2014
? Cost : $1.6 Billion
Over 300,000 software-controlled mirrors will track the sun and reflect the sunlight to boilers that sit atop three 459 foot tall towers. This heat is then turned into steam that goes through turbines to generate electricity. It will prevent the emission of over 350,000 metric tons of CO2 a year.
Solar One Solar Power Plant
Source: http://americanlivewire.com/worlds-largest-solar-thermal-power-plant-in-mojave-desert-california/
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NASA chooses all-sky planet hunter, neutron star watcher for liftoff in 2017
MIT
An artist's conception shows the Transiting Exoplanet Survey Satellite, or TESS, in space. (Planets not to scale.)
By Alan Boyle, Science Editor, NBC News
NASA has selected two new space missions for launch in 2017:?a satellite that can scan the entire sky for exoplanets and a space station experiment that can monitor cosmic X-ray emissions. The Transiting Exoplanet Survey Satellite (TESS) and the Neutron-star Interior Composition Explorer (NICER) won out at the end of a selection process that took more than two years.
"With these missions we will learn about the most extreme states of matter by studying neutron stars, and we will identify many nearby star systems with rocky planets in the habitable zone for further study by telescopes such as the James Webb Space Telescope," John Grunsfeld, NASA's associate administrator for science, said in a statement Friday.
Under the terms of NASA's Explorer Program, the TESS mission will be budgeted at no more than $200 million, and NICER's mission costs will be capped at $55 million. Those price tags exclude the cost of the launch vehicle.
Planet hunter
TESS is designed to follow up on NASA's Kepler mission, which is surveying a patch of sky in the constellations Cygnus and Lyra for extrasolar planets. Like Kepler, TESS would detect other worlds by looking for the faint dips in starlight as they make regular transits across their parent suns. TESS' array of wide-angle cameras would take in much more territory, however.
"TESS will carry out the first space-borne all-sky transit survey, covering 400 times as much sky as any previous mission," principal investigator George Ricker, a research scientist at the Massachusetts Institute of Technology's Kavli Institute for Astrophysics and Space Research, said in a statement. "It will identify thousands of new planets in the solar neighborhood, with a special focus on planets comparable in size to the Earth."
The mission's scientists say it will be possible to study the masses, sizes, densities, orbits and atmospheres of a wide range of planets, including a sampling of the rocky worlds in the habitable zones of nearby planetary systems. "The selection of TESS has just accelerated our chances of finding life on another planet within the next decade," said MIT planetary scientist Sara Seager.
TESS won out over another planet-hunting mission designed to study alien atmospheres, known as the?Fast Infrared Exoplanet Spectroscopy Survey Explorer or FINESSE.
NASA
An artist's conception shows the boxlike NICER array attached to the International Space Station.
Star watcher
NICER is an instrument that's about the size of a college dorm-room refrigerator, equipped with an array of 56 telescopes that can measure the variability of cosmic X-ray sources ? a method known as X-ray timing.?It's designed to explore the exotic states of matter within neutron stars and reveal their interior and surface compositions. The device can also monitor the stars' positions as a navigational aid.
"Our technology demonstration will establish the viability of spacecraft navigation using neutron stars, while the same instrument gives scientists an important new tool with which to better understand these stars that can serve as navigation beacons," principal investigator Keith Gendreau of NASA's Goddard Space Flight Center said in a news release.
NICER would be brought to the International Space Station aboard a Japanese HTV robotic transport craft or a SpaceX Dragon cargo capsule, and attached to the station's exterior.
NASA's Explorer Program is designed to provide frequent, low-cost access to space for astrophysics and solar science missions. The program has launched more than 90 missions, starting with Explorer 1 in 1958. The most recent Explorer mission to be launched was the Nuclear Spectroscopic Telescope Array, or NuSTAR. The next one is the?Interface Region Imaging Spectrograph, or IRIS, due for launch sometime in the next couple of months.
More about exoplanets:
Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's?Facebook page, following?@b0yle on Twitter?and adding the?Cosmic Log page?to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out?"The Case for Pluto,"?my book about the controversial dwarf planet and the search for new worlds.
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Friday, April 5, 2013
Quantum tricks drive magnetic switching into the fast lane
Thursday, April 4, 2013
Researchers at the U.S. Department of Energy's Ames Laboratory, Iowa State University, and the University of Crete in Greece have found a new way to switch magnetism that is at least 1000 times faster than currently used in magnetic memory technologies. Magnetic switching is used to encode information in hard drives, magnetic random access memory and other computing devices. The discovery, reported in the April 4 issue of Nature, potentially opens the door to terahertz and faster memory speeds.
Ames Laboratory physicist Jigang Wang and his team used short laser pulses to create ultra-fast changes in the magnetic structure, within quadrillionths of a second (femtosecond), from anti-ferromagnetic to ferromagnetic ordering in colossal magnetoresistive materials, which are promising for use in next-generation memory and logic devices. Scientists, led by Ilias E. Perakis, at the University of Crete developed the theory to explain the observation.
"The challenge facing magnetic writing, reading, storing and computing is speed, and we showed that we can meet the challenge to make the magnetic switches think ultra-fast in the femtosecond range ? one quadrillionth of a second ? by using quantum 'tricks' with ultrashort laser pulses " said Wang, who is also an assistant professor of physics and astronomy at Iowa State University.
In current magnetic storage and magneto-optical recording technology, magnetic field or continuous laser light is used. For example, photo-excitation causes atoms in ferromagnetic materials to heat up and vibrate, and the vibration, with the help of a magnetic field, causes magnetic flips. The flips are part of the process used to encode information.
"But the speed of such thermal magnetic switching is limited by how long it takes to vibrate the atoms, and by how fast a magnetic field can reverse magnetic regions" said Wang. "And it is very difficult to exceed the gigahertz switching speed limit of today's magnetic writing/reading technology."
So, some scientists have turned their attention to colossal magnetoresistive (CMR) materials because they are highly responsive to the external magnetic fields used to write data into memory, but do not require heat to trigger magnetic switching.
"Colossal magnetoresistive materials are very appealing for use in technologies, but we still need to understand more about how they work," said Wang. "And, in particular, we must understand what happens during the very short periods of time when heating is not significant and the laser pulses are still interacting with magnetic moments in CMR materials. That means we must describe the process and control magnetism using quantum mechanics. We called this 'quantum femto-magnetism.'"
Wang's team specializes in using ultra-fast spectroscopy, which Wang likens to high-speed strobe photography, because both use an external pump of energy to trigger a quick snapshot that can be then re-played afterwards. In ultra-fast laser spectroscopy, a short pulse of laser light is used to excite a material and trigger a measurement all on the order of femtoseconds.
"In one CMR manganite material, the magnetic order is switched during the 100-femtosecond-long laser pulse. This means that switching occurs by manipulating spin and charge quantum mechanically," said Wang. "In the experiments, the second laser pulse 'saw' a huge photo-induced magnetization with an excitation threshold behavior developing immediately after the first pump pulse."
The fast switching speed and huge magnetization that Wang observed meet both requirements for applying CMR materials in ultra-fast, terahertz magnetic memory and logic devices.
"Our strategy is to use all-optical quantum methods to achieve magnetic switching and control magnetism. This lays the groundwork for seeking the ultimate switching speed and capabilities of CMR materials, a question that underlies the entire field of spin-electronics," said Wang. "And our hope is that this means someday we will be able to create devices that can read and write information faster than ever before, yet with less power consumed."
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DOE/Ames Laboratory: http://www.external.ameslab.gov
Thanks to DOE/Ames Laboratory for this article.
This press release was posted to serve as a topic for discussion. Please comment below. We try our best to only post press releases that are associated with peer reviewed scientific literature. Critical discussions of the research are appreciated. If you need help finding a link to the original article, please contact us on twitter or via e-mail.
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Source: http://www.labspaces.net/127590/Quantum_tricks_drive_magnetic_switching_into_the_fast_lane
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