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PHYSICS COMPUTER SCIENCE  Scientists Express Skepticism Over Quantum ComputerThe science community takes a leery stance at D-Wave's quantum computer PHYSICS Quantum back-action has a cooling effectResearchers have developed a quantum electromechanical technique to exploit microscopic quantum effects on a macroscopic scale. The technique involves cooling a resonating beam of atoms by measuring its vibrations and could one day be used to cool nanoscale mechanical devices, say the researchers (Nature 443 193). PHYSICS Dirac medal for atomic physicistPeter Zoller of the University of Innsbruck has been awarded the 2006 Dirac medal of the International Centre for Theoretical Physics (ICTP) in Trieste, Italy. Zoller, the scientific director of the Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences in Innsbruck, is honoured for his work in atomic physics, including proposing the use of trapped ions for quantum computing. The Dirac medal -- one of the world's most prestigious physics prizes -- is given each year on 8 August, the birth date of Paul Dirac. PHYSICS Mobile-phone network reveals the ties that bindIf you and your best friend stop talking to each other after a massive row, you might think that would break up your entire social network. In fact, researchers studying the communication patterns of 4.6 million mobile-phone users suggest that your social circle is more likely to break into smaller clusters if you lose contact with more casual acquaintances (arXiv.org/physics/0610104). PHYSICS Physics in medicineFundamental breakthroughs in physics are continuing to yield new medical technologies for identifying and treating a range of diseases. PHYSICS How particles can be therapeuticUntil a cure for cancer is found, about one in three of us will probably have to undergo surgery, chemotherapy or radiotherapy at some point in our lives. Traditional radiotherapy uses X-rays to target cancerous tissue, but there is growing interest in using particles instead. Beams of hadrons, such as protons, neutrons and ions, offer important advantages over X-ray radiotherapy. Their clinical applications, however, are much less widespread. PHYSICS Antiprotons excel at cancer treatmentA beam of antiprotons should be four times better at destroying tumours than current proton-beam therapies, claim physicists at CERN. The discovery could lead to new cancer-treatment techniques that minimize the damage done to healthy tissue surrounding tumours (Radiother. Oncol. 2006 doi:10.1016/j.radonc.2006.09.012). ASTRONOMY PHYSICS The Nobel Prize in Physics goes to John C. Mather and George F. Smoot "for their discovery of the blUS space scientists John Mather and George Smoot were awarded the Nobel Physics Prize on Tuesday for a pioneering space mission which supports the "Big Bang" theory about the origins of the Universe. PHYSICS Neutrino Nobel laureate dies30 August 2006 Melvyn Schwartz, who shared the 1988 Nobel Prize for Physics, died on Monday at the age of 73. He shared the prize with Leon Lederman and Jack Steinberger for developing a way to generate beams of neutrinos. Their work, which took place at the Brookhaven National Laboratory in the US in the early 1960s, also showed that neutrinos can exist in more than one type or "flavour". PHYSICS From the present to the pastCambridge physicist Stephen Hawking and his CERN colleague Thomas Hertog have proposed a radical new approach to understanding the universe that studies it from the "top down" rather than the "bottom up" as in traditional models. The approach acknowledges that the universe did not have just one unique beginning and history but a multitude of different beginnings and histories, and that it has experienced them all. But because most of these other alternative histories disappeared very early after the Big Bang to leave behind the universe we observe today, the best way to understand the past, they say, is to trace our knowledge back from the present (Phys. Rev. D 73 123527). ASTRONOMY PHYSICS Cyclic universe could explain cosmological constantTwo theoretical physicists have developed a model that could explain why the cosmological constant takes the small, positive value that it does in today's universe. The value of the constant is responsible for the observed acceleration in the expansion of the universe. However, the new model, developed by Paul Steinhardt of Princeton University in the US and Neil Turok at Cambridge University in the UK, will be controversial. It requires that time existed before the Big Bang, assumes that the universe is older than the 14 billion years we think it is, and says that the universe regularly undergoes repeating "cycles" of big bangs and big crunches (Sciencexpress 1126231). PHYSICS Physics goes to the moviesThe popularity of a particular film largely depends on word-of-mouth recommendations according to a new study by statistical physicists in the US and Chile. César Hidalgo of the University of Notre Dame and colleagues have also developed a quantitative indicator of a film's quality, which they say could be used by film producers and studios to estimate the commercial value of a movie (New J. Phys. 8 52). PHYSICS Hottest topic in physics revealedCarbon nanotubes are the hottest topic in physics, according to a new way of ranking the popularity of different scientific fields. Nanowires are second, followed by quantum dots, fullerenes, giant magnetoresistance, M-theory and quantum computation. The new ranking has been developed by Michael Banks, a PhD student at the Max Planck Institute for Solid-State Physics in Stuttgart, Germany. He thinks the new index could be a quick and simple way of determining the most important subject areas in physics and could even help graduate students choose which field to do their PhD in (physics/0604216). PHYSICS World's most creative physicist revealedThe Nobel prize-winner Philip Anderson is the most creative physicist in the world, according to a new analysis of scientific research papers. Steven Weinberg -- another Nobel laureate -- is the second most creative physicist, followed by Ed Witten in third. The study has been carried out by José Soler, a statistical physicist at the University of Madrid, who says that his "creativity index" could help universities to recruit and promote the best staff (physics/0608006). ASTRONOMY PHYSICS Gravity lens reveals dark matterUS astronomers claim to have observed dark matter – the elusive substance that is believed to be five times as common as normal matter, accounting for nearly a quarter of the universe. PHYSICS Instituto de Física da UFRGS receberá R$ 3. 240. 865,00 para pesquisas em NanotecnologiaO Ministério da Ciência e tecnologia, por meio da FINEP (Financiadora de Estudos e Projetos) irá liberar verba para a implantação no Instituto de Física da UFRGS dos núcleos de produção, processamento e caracterização de materiais nanoscópicos e de simulação e tratamento de imagem. PHYSICS Tehran to Talk With EU Before IAEA MeetingIran Negotiator Says Tehran Will Hold Talks With EU Before U.N. Nuclear Watchdog Meeting PHYSICS US seals nuclear cooperation pact with IndiaPresident George W. Bush on Thursday pledged to end India's pariah status in the global nuclear order after more than three decades of isolation by offering it access to the international market for nuclear fuel and technology. COMPUTER SCIENCE PHYSICS Game physics starts to get realPart of the appeal of computer games is that they can take you places and show you things you would never find on Earth. PHYSICS COMPUTER SCIENCE Quantum computer solves problem, without runningPaul Kwiat, right, a John Bardeen Professor of Electrical and Computer Enginering and Physics, and graduate student Onur Hosten have found an exotic way of determining an answer to an algorithm – without ever running the algorithm. PHYSICS 'Physics for poets' takes CMC stageJudging from her short history as a playwright, it's hard to tell if Kristin Carlson is obsessed with William Blake, the 18th-century English poet and artist, or Catherine Blake, his wife of 40 years. Or neither of the two. PHYSICS Photon physics used to foil hackersA University of Toronto scientist says he is using photon physics to prevent hackers from obtaining sensitive government and business data. PHYSICS Seventh annual Physics Circus Thousand of students, parents and teachers are heading to Baylor University this week for the seventh annual Physics Circus. PHYSICS Iran nuclear talks 'not going easily': PutinLONDON, February 22 (IranMania) - Talks with Iran on a Russian plan to resolve international tensions over Tehran's nuclear programme are making little progress, Russian President Vladimir Putin said Wednesday, AFP reported. PHYSICS Iran's N-Physics Conference opens in MashhadLONDON, February 23 (IranMania) -The inaugural ceremony of Iran's Nuclear Physics Conference, which opened in the provincial capital of Mashhad on Wednesday, was attended by more than 400 university instructors and students from across the country, IRNA reported. PHYSICS Lab boss makes surprise exitPraveen Chaudhari is to step down as director of the Brookhaven National Laboratory near New York at the end of April, a post he has held for three years. Chaudhari cited personal reasons for his unexpected decision, which was announced less than two weeks after US President George Bush put forward significant new funding for Brookhaven and other nuclear physics laboratories next year. |
