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Keyword: stringtheory

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  • Is Science Neurotic? [ book review ]

    07/25/2007 11:21:07 PM PDT · by SunkenCiv · 5 replies · 153+ views
    Metapsychology ^ | July 24th 2007 | Review by Donald Stanley
    Nicholas Maxwell's Is Science Neurotic? contains one very big revisionist vision: Science needs to make its aims explicit in an underlying scheme or set of principles... The traditional aim of science has been standard empiricism (SE) and he accuses SE of a neurosis, a scientific misconstrual of what science ought to be doing and not just the discovery of facts based on experimental evidence... Maxwell, like his fellow authors... suggests a more comprehensive view of the aim of science: to postulate how science can better serve us. To make the world better. He wishes to humanize science so that we...
  • Is dark energy lurking in hidden spatial dimensions?

    07/16/2007 12:26:58 PM PDT · by SunkenCiv · 16 replies · 565+ views
    New Scientist ^ | Monday, July 16, 2007 | Stephen Battersby
    The mysterious cosmic presence called dark energy, which is accelerating the expansion of the universe, might be lurking in hidden dimensions of space. The idea would explain how these dimensions remain stable - a big problem for the unified scheme of physics called string theory... quantum vibrations in the vacuum of space (called vacuum energy or the cosmological constant) that could produce repulsive gravity... should either possess a ridiculously high energy density - 122 orders of magnitude larger than are observed - or cancel out to exactly zero. To make them almost-but-not-quite cancel, in agreement with astronomical observations, means fudging...
  • Physicists campaign to free a jailed ecoterrorist's mind [ Asperger Alibi, Ecoterrorist ]

    07/16/2007 12:18:20 PM PDT · by SunkenCiv · 4 replies · 380+ views
    Chicago Tribune ^ | Friday the 13th, July 2007 | Michael Martinez
    Two years after his 2002 graduation with honors as a double major in physics and math, Cottrell was charged and convicted as one of the nation's first ecoterrorists of the post-Sept. 11 era. He was found guilty of conspiracy and arson in the 2003 firebombings of Hummer and other sport-utility vehicle dealerships in the Los Angeles area to advocate a radical environmentalism. Two conspirators remain at large... In what prosecutors say was an example of his brazenness -- his supporters say it evidenced his behavioral disorder, one that's akin to a high-functioning autism -- Cottrell became a remorseless braggart while...
  • Moebius strip riddle solved at last(tsal ta devlos elddir pirts suibeoM)

    07/16/2007 6:50:45 AM PDT · by SubGeniusX · 23 replies · 826+ views
    ABC.AU ^ | Jul 16, 2007
    Scientists say they have cracked a nearly eight-decade-old riddle involving the Moebius strip, a mathematical phenomenon that has also become an icon of art. Popularised by the Dutch artist MC Escher, a Moebius strip entails taking a strip of paper or some other flexible material. You take one end of the strip, twist it through 180 degrees, and then tape it to the other end. This creates a loop that has an intriguing quality, dazzlingly exploited by Escher, in that it only has one side. Since 1930, the Moebius strip has been a classic poser for experts in mechanics. The...
  • U.S. Theoretical Physicists Organize To Stem 'Outsourcing'

    07/08/2007 11:05:47 PM PDT · by SunkenCiv · 12 replies · 212+ views
    University at Buffalo ^ | July 5, 2007 | Ellen Goldbaum
    ...the scientists who develop theoretical predictions for high-energy particle physics experiments say "outsourcing" in their field has allowed the U.S. to lag behind in this area of high-profile, global science... LHC-TI is a consortium of theoretical physicists whose goal is to train more U.S. graduate students in theoretical high-energy particle physics calculations relevant to the Large Hadron Collider (LHC) being built near Geneva, Switzerland... After several years of grass-roots organizing among theoretical physicsts, the group is celebrating success: the awarding of the first LHC Theory Graduate Fellowship Awards, funded by the National Science Foundation and administered by The Johns Hopkins...
  • News Ages Quickly - Scientific publishing moves into the 21st century at last

    07/05/2007 1:46:53 AM PDT · by neverdem · 14 replies · 639+ views
    Reason ^ | July 3, 2007 | Ronald Bailey
    Arguably, the Information Age began in 1665. That was the year the Journal des scavans and Philosophical Transactions of the Royal Society of London started regular publication. Making new scientific information more easily and widely available was the spark that ignited the Industrial Revolution. The founding editor of the Journal des scavans, Denis de Sallo, chose to publish his new journal weekly because, as he explained, "news ages quickly." Scientific news ages even more quickly in the 21st century than it did in the 17th century. Last week, one of the world's leading scientific journals, Nature, conceded this fact by...
  • Relativity Passes Absolute Test: Exacting research finds Einstein was exactly right

    07/04/2007 4:17:45 PM PDT · by SunkenCiv · 40 replies · 907+ views
    Discover ^ | June 22, 2007 | Stephen Ornes
    Nearly three years ago, NASA's oft-canceled $750 million Gravity Probe B Relativity Mission finally shot into space with one goal -- to quantify Einstein's predictions from Earth's orbit. Earlier this year, at the meeting of the American Physics Society, principal investigator Francis Everitt delivered the first results: Gravity Probe B has verified Einstein's theory to within 1 percent... Einstein's theory predicts that the axes should shift by a tiny amount -- 0.0018 degree -- under the influence of Earth's pull on space-time. After 18 months of data analysis, Everitt and his team measured the axial shift to within 1 percent...
  • Nice Going, Einstein

    07/04/2007 4:07:19 PM PDT · by SunkenCiv · 8 replies · 540+ views
    Discover ^ | August 1, 2006 | Lawrence Krauss
    One of the great paradoxes of physics is that while gravity was the first force in nature to be described physically and mathematically -- Isaac Newton worked out its basic laws more than 300 years ago -- it may be the last to be understood. Generations of physicists have remained stumped by the utter strangeness of gravity: Not only is it the weakest of the four natural forces, but it is also the only one that appears to be directly related to the nature of space and time... The uniquely geometric nature of gravity has made it frustratingly difficult to...
  • Scientists Mess with the Speed of Light (breaking the speed limit, sort of)

    08/24/2005 6:02:52 PM PDT · by Arkie2 · 52 replies · 1,448+ views
    pure energy systems ^ | 19 aug 05 | Ker Than
    Researchers in Switzerland have succeeded in breaking the cosmic speed limit by getting light to go faster than, well, light. Or is it all an illusion? Scientists have recently succeeded in doing all sorts of fancy things with light, including slowing it down and even stopping it all together. Now a team at the Ecole Polytechnique Fédérale de Lausanne (EPFL) in Switzerland is controlling the speed of light using simple off-the-shelf optical fibers, without the aid of special media such as cold gases or crystalline solids like in other experiments. “This has the enormous advantage of being a simple, inexpensive...
  • Light is made of particles AND waves, not OR

    03/12/2007 11:06:33 PM PDT · by LibWhacker · 47 replies · 1,381+ views
    Work completed by physics professors at Rowan University shows that light is made of particles and waves, a finding that refutes a common belief held for about 80 years. Shahriar S. Afshar, the visiting professor who is currently at Boston's Institute for Radiation-Induced Mass Studies (IRIMS), led a team, including Rowan physics professors Drs. Eduardo Flores and Ernst Knoesel and student Keith McDonald, that proved Afshar’s original claims, which were based on a series of experiments he had conducted several years ago. An article on the work titled "Paradox in Wave-Particle Duality" recently published in Foundations of Physics, a prestigious,...
  • Inconstant Speed of Light May Debunk Einstein

    08/07/2002 12:53:40 PM PDT · by Darth Reagan · 38 replies · 1,661+ views
    Reuters (via Yahoo) ^ | August 7, 2002 | Michael Christie
    SYDNEY (Reuters) - A team of Australian scientists has proposed that the speed of light may not be a constant, a revolutionary idea that could unseat one of the most cherished laws of modern physics -- Einstein's theory of relativity. The team, led by theoretical physicist Paul Davies of Sydney's Macquarie University, say it is possible that the speed of light has slowed over billions of years. If so, physicists will have to rethink many of their basic ideas about the laws of the universe. "That means giving up the theory of relativity and E=mc squared and all that sort...
  • Science and Islam in Conflict

    07/04/2007 9:49:14 AM PDT · by SunkenCiv · 4 replies · 272+ views
    Discover ^ | June 21, 2007 | Todd Pitock
    I speak with physicist Hamed Tarawneh at his cramped, dingy temporary office at UNESCO's headquarters in Amman. Tarawneh, a tall, broad-shouldered chain-smoker with a disarming smile, left years ago to get his Ph.D. in Sweden and returned to Jordan just a few months prior to our meeting. He is in the process of assembling a staff of engineers and technicians for SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East), an international laboratory organized around a machine that has wide applications in physics, biology, medicine, and archaeology. Only a handful of these versatile light generators exist, and this...
  • Echoes from Before the Big Bang May Be Inaudible

    07/01/2007 9:37:07 PM PDT · by SunkenCiv · 6 replies · 231+ views
    Scientific American ^ | July 1, 2007 | JR Minkel
    Physicist Donald Marolf of the University of California, Santa Barbara, says the finding would be strengthened if it turned up in other models of quantum gravity, such as string theory. "No one has good control over this physics in any approach to quantum gravity," he says, "and it is important to explore a broad range of models and ideas."
  • Exotic cause of 'Pioneer anomaly' in doubt

    06/26/2007 5:59:25 AM PDT · by BGHater · 67 replies · 2,175+ views
    NewScientist.com ^ | 22 June 2007 | David Shiga
    The 'Pioneer anomaly' – the mystifying observation that NASA's two Pioneer spacecraft have drifted far off their expected paths – cannot be explained by tinkering with the law of gravity, a new study concludes. The study's author suggests an unknown, but conventional, force is instead acting on the spacecraft. But others say even more radical changes to the laws of physics could explain the phenomenon. Launched in the early 1970s, NASA's Pioneer 10 and 11 spacecraft are drifting out of the solar system in opposite directions, gradually slowing down as the Sun's gravity pulls back on them. But they are...
  • Moon-based lasers could uncover exotic physics

    07/01/2007 9:04:42 PM PDT · by SunkenCiv · 9 replies · 217+ views
    New Scientist ^ | June 25, 2007 | David Shiga
    NASA is funding the development of lasers that could be placed on the Moon to check for subtle deviations from the standard theory of gravity. Lasers have been used to make very precise measurements of the Earth-Moon distance since the Apollo era, when astronauts left reflectors at three sites on the lunar surface. A fourth reflecting device is attached to a robotic lunar lander launched by the Soviet Union. To pin down the Moon's distance, scientists bounce light from Earth-based lasers off of these reflectors and measure how long it takes to return. Because the Moon's motion is governed by...
  • Gravity waves analysis opens 'completely new sense'

    10/29/2002 10:42:41 AM PST · by RightWhale · 131 replies · 1,248+ views
    spaceref.com ^ | 29 Oct 02 | Washington Univ
    Gravity waves analysis opens 'completely new sense' PRESS RELEASE Washington University in St. Louis St. Louis, MO. -- Sometime within the next two years, researchers will detect the first signals of gravity waves -- those weak blips from the far edges of the universe passing through our bodies every second. Predicted by Einstein's theory of general relativity, gravity waves are expected to reveal, ultimately, previously unattainable mysteries of the universe. Wai-Mo Suen, Ph.D., professor of physics at Washington University in St. Louis is collaborating with researchers nationwide to develop waveform templates to comprehend the signals to be analyzed. In...
  • 13 things that do not make sense

    03/17/2005 10:25:36 AM PST · by ShadowAce · 163 replies · 6,757+ views
    New Scientist ^ | 19 March 2005 | Michael Brooks
    1 The placebo effect DON'T try this at home. Several times a day, for several days, you induce pain in someone. You control the pain with morphine until the final day of the experiment, when you replace the morphine with saline solution. Guess what? The saline takes the pain away. This is the placebo effect: somehow, sometimes, a whole lot of nothing can be very powerful. Except it's not quite nothing. When Fabrizio Benedetti of the University of Turin in Italy carried out the above experiment, he added a final twist by adding naloxone, a drug that blocks the effects...
  • Amateur mathematician's time theories published at last

    07/31/2003 1:01:59 AM PDT · by JerseyHighlander · 88 replies · 1,078+ views
    New Zealand Herald ^ | 31.07.2003 11.04 am | NZPA
    Amateur mathematician's time theories published at last 31.07.2003 11.04 am University drop-out Peter Lynds, 27, of Wellington says he has further plans for mathematical and philosophical explorations after publication of his theories on the nature of time. Mr Lynds, who studied at university for just six months, said his paper, Time and Classical and Quantum Mechanics: Indeterminacy vs Discontinuity, was being published in the August issue of a Dutch-based journal, Foundations of Physics Letters. The journal specialises in rapid dissemination of research in theoretical or mathematical physics, or the philosophy of science. Now a broadcasting school tutor, Mr Lynds said...
  • Laser-cooling Brings Large Object Near Absolute Zero

    06/23/2007 9:46:43 PM PDT · by SunkenCiv · 4 replies · 197+ views
    Science Daily ^ | April 8, 2007 | Massachusetts Institute of Technology
    To see quantum effects in large objects, they must be cooled to near absolute zero. Such low temperatures can only be reached by keeping objects as motionless as possible. At absolute zero (0 Kelvin, -273 degrees Celsius or -460 degrees Fahrenheit), atoms lose all thermal energy and have only their quantum motion... the researchers report that they lowered the temperature of a dime-sized mirror to 0.8 degrees Kelvin... But in order to observe quantum behavior in an object of that size, the researchers need to attain a temperature that is still many orders of magnitude colder, Mavalvala said. To reach...
  • Astronomers May Have Solved Information Loss Paradox To Find Black Holes Do Not Form

    06/23/2007 9:05:53 PM PDT · by SunkenCiv · 5 replies · 175+ views
    Science Daily ^ | June 21, 2007 | Case Western Reserve University
    According to the researchers, if black holes exist, information formed in the initial state would disappear in the black hole through a burst of thermal radiation that carries no information about the initial state. Using the functional Schrodinger formalism, the researchers suggest that information about the energy from radiation is long evaporated before an event horizon forms. "An outside observer will never lose an object down a black hole," said Stojkovic. "If you are sitting outside and throwing something into the black hole, it will never pass over but will stay outside the event horizon even if one considers the...