feed info

220,990 articles from PhysOrg

NASA's Ion Engine Breaks Performance Record

An ion engine prototype developed at NASA's Glenn Research Center has now accumulated more than 12,000 hours of operation and processed over 245 kilograms of xenon, setting a record for most propellant throughput ever demonstrated by an ion engine.

Playing video games reduces sex differences in spatial skills

University of Toronto researchers have discovered that differences between men and women on some tasks that require spatial skills are largely eliminated after both groups play a video game for only a few hours. The research, to be published in the October issue of Psychological Science, suggests that a new approach involving action video games can be used to improve spatial skills that are...

Drug Trials Go Unwatched, Study Says

(AP) -- Clinical trials that enroll millions of patients in tests of experimental drugs and medical devices get scant government oversight, according to a watchdog report released Friday.

'Dead time' limits quantum cryptography speeds

Quantum cryptography is potentially the most secure method of sending encrypted information, but does it have a speed limit" According to a new paper by researchers at the National Institute of Standards and Technology and the Joint Quantum Institute, technological and security issues will stall maximum transmission rates at levels comparable to that of a single broadband connection, such as a...

Measurements from the edge: magnetic properties of thin films

Materials researchers at the National Institute of Standards and Technology, together with colleagues from IBM and the Massachusetts Institute of Technology, have pushed the measurement of thin films to the edge—literally—to produce the first data on how the edges of metallic thin films contribute to their magnetic properties. Their results may impact the design of future nanoscale electronics.

Surprise in the organic orchard -- a healthier worm in the apple

Insects can catch more than a cold from certain viruses. Some viruses can be lethal to pest species - turning their insides to soup - without harming beneficial insects or other organisms. Hence they are used as an environmentally friendly means of biological crop protection worldwide. The proverbial worm in the apple, the codling moth caterpillar, has been controlled in European orchards for...

Mysterious energy burst stuns astronomers

Astronomers studying archival data from an Australian radio telescope have discovered a powerful, short-lived burst of radio waves that they say indicates an entirely new type of astronomical phenomenon.

Water forms floating 'bridge' when exposed to high voltage

While it's one of the most important and abundant chemical compounds on Earth, water is still a puzzle to scientists. Much research has been done to uncover the structure of water beyond the H2 O scale, which is thought to be responsible for many of water`s unique properties. However, the nature of this structure, governed by hydrogen bonds, is currently unknown.

DNA damage response confers a barrier for viral tumorigenesis

Kaposi`s sarcoma herpesvirus (KSHV) is a human tumor virus and an etiological agent for Kaposi`s sarcoma (KS). KSHV infection is endemic in sub-Saharan Africa where KS is nowadays the most common malignancy, due to widespread infection with KSHV and human immunodeficiency virus (HIV). Importantly, KS also occurs in HIV-negative individuals. Researchers at the University of Helsinki, Finland, have...

Gamers Spend About $170M on 'Halo 3'

(AP) -- Video game enthusiasts in the United States plunked down about $170 million on copies of "Halo 3" in the 24 hours after the Xbox 360 game went on sale, Microsoft Corp. said Wednesday.

New research shows how H5N1 virus causes disease

H5N1 influenza, also known as avian influenza, is considered a major global threat to human health, with high fatality rates. While little had been known about the specific effects of H5N1 on organs and cells targeted by the virus, researchers at Beijing University, Columbia University Mailman School of Public Health, and SUNY Downstate report in the September 29, 2007 issue of the Lancet...

Palm Shares Surge on New Palm Centro

(AP) -- Shares of Palm Inc. rose more than 6 percent Thursday after the smartphone maker unveiled a trimmer, more affordable model designed to fight back against the onslaught of competition and attract more customers.

Robots Take on Social Tasks

(AP) -- Dominated by home-cleaning gadgets, the consumer robotics market is expanding with the arrival of 'bots that can spy inside your home when you're away or arrange virtual meetings of family or friends.

Texas Unveils Fitness Test for Students

(AP) -- Ten-year-old Peter Choi said he prefers playing dodgeball to crunching out abdominal curl-ups. But the modified sit-ups that the fifth-grader at Arapaho Classical Magnet School says sometimes make his stomach hurt are here to stay, part of the statewide physical fitness test introduced Thursday by the Texas Education Agency.

Texting, Facebook Used to Alert Students

(AP) -- When a masked freshman came to campus at St. John's University with what police said was a loaded rifle sticking out of a bag, the school alerted students via cell-phone text messages within 18 minutes.

Two-Headed Turtle Goes on Display in Pa.

(AP) -- A pet store has bought a two-headed turtle from a collector and plans to keep it on display, the store manager said. The 2-month-old turtle, actually conjoined red-eared slider twins, fits on a silver dollar.

Sixty pint beer binge leads to four-week hangover

It may be the longest hangover in the history of binge beer drinking. When a 37-year old man walked into a hospital emergency room in Glasgow, Scotland last October complaining of "wavy" vision and a non-stop headache that had lasted four weeks, doctors were at first stumped, the British journal The Lancet reported Friday.