22-04-2008   -   Energy

Tue, 22 Apr 2008 Water Needed To Produce Various Types Of Energy. It is easy to overlook that most of the energy we consume daily, such as electricity or natural gas, is produced with the help of a dwindling resource -- fresh water. Scientists are researching the water-efficiency of some of the most common energy sources and power generating methods.more

  15-04-2008   -   Physics

Tue, 15 Apr 2008 Scientists Find A Surprise When They Look For What Binds In Superconductivity. For more than 20 years since the discovery of high-temperature superconductivity, scientists have been debating the underlying physical mechanism for this exotic phenomenon. Now, provocative results yielded by two years of experiments carried out at Princeton University have a group of scientists saying that high-temperature superconductivity does not hinge on a magical glue binding electrons together. The secret to superconductivity, they say, may rest instead on the ability of electrons to take advantage of their natural repulsion in a complex situation.more

  13-04-2008   -   ICT

Sun, 13 Apr 2008 Researchers Classify Web Searches. Although millions of people use Web search engines, researchers completed by show that -- by using relatively simple methods -- most queries submitted can be classified into one of three categories.more

  06-04-2008   -   Environment

Sat, 05 Apr 2008 Multi-century High-resolution Climate Simulations Created Using Supercomputers. Using state-of-the-art supercomputers climate scientists have performed a 400-year high-resolution global ocean-atmosphere simulation with results that are more similar to actual observations of surface winds and sea surface temperatures. more

  31-03-2008   -   Physics

Mon, 31 Mar 2008 First Insights Into Magnetic Fields. 3-D images are not only useful in medicine; the observation of internal structures is also invaluable in many other fields of scientific investigation. Researchers have now succeeded, for the first time, in a direct, three-dimensional visualization of magnetic fields inside solid, non-transparent materials. more

  24-03-2008   -   Environment

Mon, 24 Mar 2008 Chemists Find New Important Contributor To Urban Smog. Chemists have discovered that a chemical reaction in the atmosphere above major cities long assumed to be unimportant in urban air pollution is in fact a significant contributor to urban ozone -- the main component of smog. more

  18-03-2008   -   Nuclear

Mon, 17 Mar 2008 New Tool To Monitor Nuclear Reactors Developed. International inspectors may have a new tool in the form of an antineutrino detector, that could help them peer inside a working nuclear reactor. Scientists recently demonstrated that the operational status and thermal power of reactors can be quickly and precisely monitored over hour-to month-time scales, using a cubic-meter-scale antineutrino detector. The detector could be used to determine the operational amount of plutonium or uranium necessary to run the reactor and place a direct constraint on the amount of fissile material the reactor creates throughout its lifecycle. more

  18-03-2008   -   Physics

Mon, 17 Mar 2008 How Fundamental Particles Lose Track Of Quantum Mechanical Properties. Physicists report a series of experiments in Science that mark an important step toward understanding a longstanding fundamental physics problem of quantum mechanics. The problem the physicists addressed is how a fundamental particle in matter loses track of its quantum mechanical properties through interactions with its environment.more

  16-03-2008   -   Medicine

Sat, 15 Mar 2008 Lymphoma Patients Benefit From Combined PET-CT Scanning, Study Suggests. Combined positron emission tomography and computed tomography imaging of lymphoma patients is a more effective method to evaluate response to radiation therapy, and may help patients avoid unnecessary follow-up treatments, a new study suggests. The fused imaging results in greater accuracy when evaluating treatment results. more

  16-03-2008   -   Physics

Sun, 16 Mar 2008 Closing The "Pseudogap" On Superconductivity. One of the biggest mysteries in studying high-temperature (Tc) superconductors - materials that conduct electrical current with no resistance below a certain transition temperature - is the origin of a gap in the energy level of the materials" electronic spectrum. Physicists are researching this "pseudogap." more

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
 السابق   التالي