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223,170 articles from PhysOrg

Radio Tunes in Electronic Ratings

(AP) -- Radio advertisers who for years complained about the low-tech way of tracking listeners are getting what they asked for and more: Electronic ratings are delivering more accurate counts, but are also upending basic assumptions about the industry.

Researchers investigate new suspect in West Nile deaths of pelicans

Veterinary entomologist Greg Johnson of Montana State University said earlier this year that he considered the possibility that lice were transmitting West Nile virus to pelicans. He became suspicious after collecting very few mosquitoes in 2006, but seeing pelicans continue to die at a high rate. Johnson discovered previously that the Culex tarsalis mosquito is the primary carrier of West Nile...

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.