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August 31, 2007

Energy beam weapon could be used in Iraq

MSNBC: Since 2003 US military leaders repeatedly and urgently requested — and were denied — an energy beam weapon called the Active Denial System. The device, which is perched on a Humvee or a flatbed truck, has a range of 500 yards and uses directed-energy beams that can penetrate a few millimeters under the skin causing pain. As the soldiers train it on a crowd, the pain makes them disperse. "I am convinced that the tragedy at Fallujah would not have occurred if an Active Denial System had been there," Air Force science advisor Gene McCall told Gen. Richard Myers, chairman of the Joint Chiefs of Staff, according to an e-mail obtained by Associated Press. The system should become "an immediate priority," McCall said. However, the international red cross and other non-profit organizations, and other governments have a number of concerns related to the deployment of energy-based weapons, including whether such devices break the Geneva Convention on torture and the convention on conventional weapons. See also an earlier Physics Today news pick on laser blinding weapons being deployed to Iraq. Laser blinding weapons in Iraq Federation of American Scientists web site on the Convention on Conventional Weapons convention on conventional weapons web site Active Denial System wikipedia entry

Two IBM discoveries add promise for nano-computing

Reuters: Imagine cramming 30,000 full-length movies into a gadget the size of an iPod. Scientists at IBM said on Thursday they had moved closer to such a feat by learning how to steer single atoms in a way that could create building blocks for ultra-tiny storage devices.

Tenn. neutron accelerator sets record

Houston Chronicle: The $1.4 billion Spallation Neutron Source facility, though still powering up, has established a new mark as the world's most powerful accelerator-based source of neutrons for scientific research. The Oak Ridge National Laboratory announced Thursday that the SNS's neutron beam reached 183 kilowatts on Aug. 11, surpassing the 163-kilowatt record held by the ISIS facility at Rutherford Appleton Laboratory near Oxford, England. Although the capacity of the ISIS facility is being doubled, Oak Ridge officials said their accelerator is designed to produce up to 10 times more neutrons than now.

MacCready, scientist and inventor dead at 81

LA Times: Paul B. MacCready, an accomplished meteorologist, a world-class glider pilot and a respected aeronautical engineer, has died. He was 81. The Caltech-trained scientist and inventor created the Gossamer Condor -- the first successful human-powered airplane--as well as other innovative aircraft. MacCready died in his sleep at his Pasadena home Tuesday, according to an announcement from AeroVironment Inc., the Monrovia-based company he founded. The statement said he had been recently diagnosed with a serious ailment but the cause of death was not listed.

Mapping the Earth's Engine

Science: Particle physicists and geophysicists rarely meet to compare notes, but earlier this year researchers from these two disciplines gathered to discuss antineutrinos (the antiparticle of the neutrino). These fundamental particles are a by-product of reactions occurring in nuclear reactors and pass easily through Earth, but they are also generated deep inside Earth by the natural radioactive decay of uranium, thorium, and potassium (in which case they are called geoneutrinos). Particle physicists have recently shown that it is possible to detect geoneutrinos and thus establish limits on the amount of radioactive energy produced in the interior of our planet.

Scientists Seeking New Homes for Orbiting Climate Sensors

Science: Free the NPOESS Five. That's the message from U.S. climate scientists hoping to find a way into space for five sensors stripped last year from plans for a multibillion-dollar satellite system (Science, 16 June 2006, p. 1580). An upcoming report lays out their preferences for salvaging the sensors, which are innocent victims of massive cost overruns in the $11 billion National Polar-Orbiting Operational Environmental Satellite System (NPOESS). But those choices--essentially, sticking the sensors back onto NPOESS or flying them on separate missions--are running up against tight budgets and a government decision to emphasize short-term monitoring for military and civilian weather forecasts over long-term measurements of global climate.

Asian Powers Shoot for the Moon With Orbiting Research Missions

Science: If the moon shines more brightly on Asia in the next few years, it may be because three Asian powers are using a trio of spacecraft to shed some scientific light on the lunar surface. Barring last-minute glitches, Japan will launch its Selene mission on 13 September. China's Chang'e 1 is expected to go up within a few weeks of that launch, and India aims to follow in April with Chandrayaan-I. Lunar scientists are cheering the science-driven missions, which promise the most detailed look at the moon since NASA's Apollo program. The results could help resolve outstanding questions about the moon's hazy origins and evolution and prepare for possible crewed landings. And although most data will be shared with European and U.S. colleagues, Asian scientists will be spearheading the analyses. "It's a good chance for Asian scientists" to make a mark in lunar studies, says Hitoshi Mizutani, a planetary scientist who led Selene's development until retiring 2 years ago from the Institute of Space and Astronautical Science (ISAS) in Sagamihara, Japan.

Air force had early warning of pulsars

Nature: It was one of the most important astronomical discoveries of the twentieth century, and it became one of the more controversial when only one of the discoverers received a Nobel prize. Now, 81-year-old Charles Schisler, who forty years ago was a US Air Force staff sergeant at a remote Alaskan radar outpost, has come forward to explain how he had used a military radar to identify around a dozen radio sources, some of which were pulsars, months before the science community officially discovered the astronomical objects. Astronomers who have seen Schisler's meticulous logs believe that he spotted a bright pulsar in the nearby Crab Nebula months before the first scientific observation of a pulsar was published in Nature (A. Hewish et al. Nature 217, 709–713; 1968). Although Schisler never knew exactly what he was seeing, the story should be counted as an early pulsar spotting, says Jocelyn Bell Burnell, an astronomer at the University of Oxford, UK, and one of the authors on the original paper. "He happened to be a very observant person," Bell Burnell says.

Scientists sue NASA, Caltech over deep new background checks

International Herald Tribune: Jet Propulsion Laboratory scientists and engineers sued NASA and the California Institute of Technology on Thursday, challenging extensive new background checks that the space exploration center and other federal agencies began requiring in the wake of the Sept. 11 terror attacks. The lawsuit was filed in U.S. District Court in Los Angeles by 28 plaintiffs. Many have worked on such projects as the Mars rovers, the Galileo probe to Jupiter and the Cassini mission to Saturn, but none are involved in classified work, according to the suit. It seeks class-action status to represent similar JPL employees. Caltech was sued because it manages JPL for NASA and employs its staff. The suit also named the U.S. Department of Commerce, which is involved in promulgating federal identification standards.

Victories Come Slowly in Cleanup Of Soviet Bloc Nuclear Materials

Washington Post: David Hoffman reports on the efforts to contain the flow of nuclear material into the wrong hands, by following Sen. Richard G. Lugar (R-Ind.) and former senator Sam Nunn (D-Ga.) on a visit to Podolsk, Russia. Last Wednesday, five green reinforced containers holding a total of 21 pounds of uranium, about a third of it highly enriched, which had been quietly removed from a research reactor in Otwock, Poland, were opened up in Podolsk and blended down for use in nuclear power plants. Lugar, ranking Republican on the Senate Foreign Relations Committee, said, "People around the world would be reassured if they saw what we saw today." Nunn and Lugar who sponsored legislation at the end of the cold war to remove thousands of tons of weapons-grade radioactive material from loosely guarded sites remain worried at the slow pace of the decommissioning program.

August 30, 2007

Iran accepts fresh nuclear plan

BBC: The UN nuclear watchdog says Iran has agreed to a plan aimed at clearing up questions about its controversial nuclear activities. The IAEA says the development is "significant", but adds that for the plan to work, it is essential to get full and active co-operation from Iran. It also says Iran is continuing its enrichment programme, but at a slower pace than before, despite UN sanctions

Magnets pass new pressure test at CERN

CERN Courier: Repairs to the magnets that have caused so much trouble at the Large Hadron Collider at CERN have passed the pressure tests that caused the unaltered magnets to lurch out of position (see an upcoming story in the September issue of Physics Today for more information about the LHC's delayed schedule).

Nuclear Reactions in the Lab Mimic Supernovas

Space.com: Burning more brilliantly than a billion suns, the energy-packed star deaths known as supernovas have lately enabled scientists to discover fundamental properties of the universe. Now physicists hope to uncover new cosmic secrets by recreating some supernova features in the lab. The REsonator SOLenoid with Upscale Transmission (RESOLUT) joins a small number of facilities around the world able to recreate some of the emissions and reactions of nature's biggest fireworks display.

Sawyer predicted global warming rate in 1972

Nature: Neville Nicholls from Monash University in Australia reminds readers of Nature that thirty-five years ago this week, atmospheric scientist J. S. Sawyer published (Nature 239, 23–26; 1972) a prediction that a 25% increase in atmospheric carbon dioxide predicted to occur by 2000 corresponded to an increase of 0.6 °C in world temperature. In fact global surface temperature rose about 0.5 °C between the early 1970s and 2000. As the prediction was made during a period in which global temperatures had been falling in the decades, "Sawyer's prediction of a reversal of this trend, and of the correct magnitude of the warming, is perhaps the most remarkable long-range forecast ever made," says Nicholls.

August 29, 2007

Einsten right, neutron stars warp space-time

Xinhua: Albert Einstein and science fiction writers predicted the warping of space-time around neutron stars, the most dense observable matter in the universe, and now there is proof.

Nanotech Discovery Could Lead to Spiderman Suit

Wired: A team of Italian scientists says their latest nanotech discovery is the secret to the wall-scaling Spiderman suit.

How T-Force abducted Germany's best brains for Britain

Guardian Unlimited: Secret papers reveal post-war campaign to loot military and commercial assets

Greenhouse gases fueled 2006 U.S. heat

Reuters: Greenhouse gas emissions -- not El Nino or other natural phenomena -- pushed U.S. temperatures for 2006 close to a record high, government climate scientists reported on Tuesday.

August 28, 2007

China legislates to tolerate scientific failures

Xinhua: Chinese lawmakers are legislating for the first time to allow scientists to report failures during the process of innovation without blotting their records in future funding applications.

Forecast for solar power: Sunny

USA Today: Solar power has long been the Mercedes-Benz of the renewable energy industry: sleek, quiet, low-maintenance.

Jupiter shield's mixed blessing

BBC: It is a commonly held belief that Jupiter shields Earth from comets or asteroids that might otherwise hit us.

Photonic transistors mechanism explained

VNUNet.com: Scientists have published a new theory which describes how the transistors in next-generation quantum computers may be created.

August 27, 2007

Russia drops spy probe against scientists

Reuters: Russia's state security service said on Friday it had dropped an investigation into two scientists suspected of disclosing state secrets in a book to commemorate the anniversary of their institute.

ITER gets vocal support in China

Xinhua: leading plasma physicist testified Friday on international collaboration for building the world's first experimental fusion reactor at the Chinese legislature.

Dissent Threatens U.S.-India Nuclear Cooperation Deal

The Washington Post: After two years of painstaking negotiations, a historic nuclear cooperation agreement between the United States and India appears to be unraveling as a broad spectrum of political parties calls on the government of Prime Minister Manmohan Singh to scrap the deal, saying it limits the country's sovereignty in energy and foreign policy matters.

Moon meteorites may hold clue to life on Earth

The Daily Telegraph: Scientists are planning a mission to drill beneath the Moon's surface for buried meteorites that may hold clues to how life began on Earth.

August 24, 2007

Scientists puzzle over enormous void

Telelegraph.co.uk: Astronomers are scratching their heads over a puzzling non-discovery, an enormous hole in the universe measuring nearly a billion light-years across.

California: A Seismic Lull for Los Angeles

The New York Times: Los Angeles appears to be in a centuries-long seismic lull between periods of powerful earthquake activity, while communities inland could be at higher risk of big quakes.

NSF, NIH Emphasize the Importance of Mentoring

Science: Two key science agencies have issued policy directives this month that emphasize the role of investigators in helping postdocs grow into independent researchers.


Political clock ticks against India-U.S. nuclear deal

Reuters: A historic nuclear energy deal between India and the United States is hanging in the balance due to political opposition in New Delhi, but could still be saved if it reaches the U.S. Congress early next year, analysts said.

August 23, 2007

Borexino Awash in Neutrinos

ScienceNow: A huge tank of liquid buried deep in the Italian Apennine mountains has made the first accurate measurement of low-energy neutrinos coming from the heart of the sun. The results generally confirm physicists' theories of how the sun's nuclear furnace generates its heat and support recent findings about the strange nature of neutrinos.

Change in hottest year fuels global warming skeptics

The Christian Science Monitor: A tweak to NASA’s record shows that 4 of the 10 warmest years in the USoccurred during in the 1930s, not more recently. Climate change deniers say this points out that concern over global warming is unfounded.

Saturnian moon’s hail might hurt probe

MSNBC: Some scientists worry about Cassini orbiter’s flyby of Enceladus

Quantum physics: Wave goodbye

Nature: When measuring photons, it's a case of 'wanted, dead' — catching them alive is not an option. But we can observe how a superposition of many photon waves progressively collapses as it interacts with a beam of atoms.


August 22, 2007

Iran, IAEA Agree on Nuclear Timetable

ABC News: Iran, IAEA Agree on Nuclear Timetable, but U.S. Criticizes Accord

Tenn. nuclear fuel problems kept secret

Miami Herald: A three-year veil of secrecy in the name of national security was used to keep the public in the dark about the handling of highly enriched uranium at a nuclear fuel processing plant - including a leak that could have caused a deadly, uncontrolled nuclear reaction.

Can one theory explain all things physical?

MSNBC: ‘Standard model’ leaves out gravity and turns wonky at high energies

Google creates virtual observatory

BBC: The constellations of Andromeda, Hydra and Vulpecula are now just a mouse click away for amateur star-gazers, following the launch of Google Sky.

August 21, 2007

After 4.5 Billion Years, Sunshine Finally Figured Out

Space.com: A giant underground experiment has given researchers their first glimpse into the heart of the sun and the subatomic particles that shine down on Earth everyday.

China Emissions Situation Grim in First Half of 2007

Environmental News Network: Emissions of a key air pollutant fell slightly in China in the first half of the year but water quality worsened, the country's environmental watchdog said Tuesday, urging tougher measures to deal with a grim pollution situation.

Rare dead star found near Earth

BBC: Astronomers have spotted a space oddity in Earth's neighbourhood - a dead star with some unusual characteristics.

How physics can explain why some countries are rich and others are poor

Slate.com: If economics can tell us something useful about crime, marriage, or carpooling—as I believe it can—then other academic disciplines should have something to tell us about economies. Last month, Science published an example that may turn out to be important. Two physicists, Cesar Hidalgo and Albert-László Barabási, and two economists, Bailey Klinger and Ricardo Hausmann, have been drawing unusual pictures of economic "space" that promise a deeper understanding of the biggest question in economics: why poor countries are poor.

August 20, 2007

X marks Fermilab future

Chicago Tribune: A proposed $500 million particle accelerator could help it land an even bigger project

Is Chernobyl fallout behind academic slump in Sweden?

The Register: It is 21 years since the nuclear plant at Chernobyl went bang, and the extent of the damage wrought by the radioactive fallout is still becoming clear.

Galactic Collision Challenges Dark Matter Theories

Science: Astronomer Arthur Eddington's prophetic quote about the universe still holds: It is stranger than we can imagine. And new images from NASA's Chandra X-ray Observatory combined with views from two ground-based optical telescopes have produced one of the biggest cosmic mysteries yet. A collision between giant galactic clusters seems to have separated the galaxies from their dark matter cores. The find threatens to turn current thinking about dark matter on its ear.

Researchers Seek to Recreate Fusion

NPR: In southern France, researchers from around the globe are building a massive machine that will recreate fusion. That's where two atoms become one, and release energy. Researchers say this new machine will come close to their final goal: a fusion power plant that generates electricity.

August 17, 2007

NSF grant system near breaking point says applicants

Science: A NSF-funded survey to explore the impact of NSF rejecting an increasing number of grant applications over the last four years has found that 56% of scientists thought the NSF review process was fair. However, the same survey found that program managers, reviewers are working harder to process an increasing number of applications, and that one in six scientists decline an invitation to review proposals, either by mail or in person at NSF's Arlington, Virginia, headquarters. Nearly two-thirds of those who say no cite a lack of time. "My fear is getting into an irreversible downward spiral, with funding rates so low that people stop submitting and we can't find enough reviewers," says NSF director Arden Bement. "Right now we're on the precipice."

Australian scientists call for ocean network probe

Reuters: John Church of the Australian government-backed Commonwealth Scientific and Industrial Research Organisation has called for the establishment of a network of deep ocean moorings to extend a system already in operation in the northern hemisphere. Church is a senior science adviser to the U.N.-backed World Climate Research Programme. Probes should be strung across the South Atlantic and through the Indonesian archipelago, as well as in the Southern Ocean in order to warn of changes in ocean circulation that may affect the global climate says Church.

Secrets of the martian soil

Nature: For 30 years scientists have believed that there are no organic molecules in the martian soil. Will NASA's Phoenix probe prove them right or wrong, asks Corinna Wu

Atlantic yields climate secrets

BBC: Scientists have painted the first detailed picture of Atlantic ocean currents crucial to Europe's climate. Using instruments strung out across the Atlantic, a UK-led team shows that its circulation varies significantly over the course of a year. Writing in the journal Science, they say it may now be possible to detect changes related to global warming.

August 16, 2007

Gates Foundation to help Iraqi academics escape persecution

Financial Times: Victoria Kim reports that the Bill and Melinda Gates Foundation is helping to fund a new initiative to relocate more than 150 Iraqi scholars who are facing persecution. The foundation will provide $5m (£2.5m) for fellowships to Iraqi scholars trying to continue their work at institutions in other countries, notably Jordan, matching funds provided by the US Congress. The money will be administered by the Scholar Rescue Fund, an organisation founded in 2002 by Wall Street investors that helps academics in conflict zones.

Iraq is "the closest thing that any of us have seen to the Holocaust in terms of attacks on science and learning", said Allan Goodman, president and chief executive of the non-profit International Institute of Education, which administers the fund.

"It is not even clear who is doing it," said Dr Jarecki, the fund's chairman.

Metal turned to glass

Nature: In order to form a glass by cooling a liquid, the normal process of solid crystallization must be bypassed. Achieving that for a pure metal had seemed impossible — until pressure was applied to liquid germanium

British climate bill nearing completion

Reuters: Britain is likely to put forward legislation within three months to cut carbon emissions by at least 60 percent in the fight against global warming, environmentalists said on Wednesday.

Finnish nuclear dump raises concern while US industry considers expanding

Various: NPR investigates the latest news on the nuclear industry. In one report, Emily Harris visits the worlds first deep underground waste storage in Finland. The dump is scheduled to open in 2020, but some Finnish groups are concerned how the waste will cope with being buried for thousands of years. In a separate report John Ydstie talks to Fortune magazine's David Whitford about the future of the nuclear power industry. See also a Stronger Future for Nuclear Power, Physics Today February 2006, page 19.

Energy Firms Plan New Nuclear Power Plants
Concerns Linger for 2020 Nuclear Dump Openingt

August 15, 2007

Electric Roadster Trendy with the Famous

NPR: Even without big-name makers of electric cars, there are some big names driving them: Calif. Gov. Arnold Schwarzenegger and George Clooney both bought the all-electric Roadster sports car. It goes from zero to 60 miles per hour in four seconds, and charges from a household plug.


Tiny wind engines cool computers

BBC: Minuscule wind engines could help to take computing power to the next level, scientists believe.

Scandal mars UC chief's legacy

San Francisco Chronicle: Why he's quitting: Dynes says he wants to spend more time with wife of 5 months

Hot gas in space mimics life

USA Today: Electrically charged specks of interstellar dust organize into DNA-like double helixes and display properties normally attributed to living systems, such as evolving and reproducing, new computer simulations show

August 14, 2007

In the Footsteps of His Uncle, Then His Father

The New York Times: Gino Segre followed the family tradition of becoming a physicist, but then turned to writing science history for a broader audience.