A team of physicists and engineers have demonstrated all-fibre quantum logic, where single photons are generated and used to perform the contolled-NOT quantum logic gate in optical fibres with high fidelity.
The only quantum technology in practical use today is quantum cryptography and is currently limited in the distance over which secure communication may occur.
The Centre for Epidemiological Studies into Sexually-Transmitted Diseases and AIDS in Catalonia (CEEISCAT) started a pioneering study in Spain in 2005 to look into the prevalence of sexually-transmitted diseases (STDs) among female sex workers (SWs). The objective was to monitor the rates of infection with both HIV and other diseases over time, as well as the prevalence of risky behaviour.
BOULDER--Melting of the Greenland ice sheet this century may drive more water than previously thought toward the already threatened coastlines of New York, Boston, Halifax, and other cities in the northeastern United States and in Canada, according to new research led by the National Center for Atmospheric Research (NCAR).
Drs. Timothy Halliday and Sally Kwak, economics professors at the University of Hawaii at Manoa, recently published a paper in Economics and Human Biology titled, "Weight Gain in Adolescents and Their Peers." The article examines trends in adolescent body mass index (BMI) in a nationally representative dataset.
COLUMBUS, Ohio – A new study provides some of the strongest evidence to date that Americans prefer to read political articles that agree with the opinions they already hold.
Researchers found that people spent 36 percent more time reading articles that agreed with their point of view than they did reading text that challenged their opinions.
Even when they did read articles that countered their views, participants almost always balanced that with reading others that confirmed their opinions.
COLUMBUS, Ohio – White students generally increased their number of interracial friendships during their first year of college, while black students showed a slight decrease, according to a study at one highly selective private university.
Results showed that students were particularly likely to develop more interracial friendships if they were paired with a residence-hall roommate of a different race.
But white students who joined fraternities or sororities didn't increase their number of friends of other races during their first college year.
Assisted reproductive technology (ART) is responsible for an estimated 219,000 to 246,000 babies born each year worldwide according to an international study. The study also finds that the number of ART procedures is growing steadily: in just two years (from 2000 to 2002) ART activity increased by more than 25%.
Elderly people who live below the poverty line and perceive their neighborhoods to be dangerous are more likely to have a mobility disability. Researchers writing in the open access journal BMC Public Health suggest that even perceiving one's neighborhood as unsafe can 'get into the body' and, ultimately, prove hazardous for elder health.
Advertisements shown during children's television before new restrictive regulations were introduced were not any more focused on unhealthy food than adverts shown at other times, according to research published ahead of print in the Archives of Disease in Childhood.
A common belief that TV advertisers were targeting children in particular with unhealthy foods before new Ofcom regulations were introduced in 2007 to prevent this, was not the case, researchers found, questioning what real impact the regulations will actually have.
PITTSBURGH—Carnegie Mellon University researchers have created a model for providing empirical evidence on when an ex-convict has been "clean" long enough to be considered "redeemed" for employment purposes.
The melting of the Greenland Ice Sheet this century may drive more water than previously thought toward the already threatened coastlines of New York, Boston, Halifax and other cities in the northeastern United States and Canada, according to new research.
CHAMPAIGN, Ill. — Financial contracts to care for sick or aging relatives – nearly unthinkable just a decade ago – are drawing new interest as everyday Americans wrestle with the time and expense of providing long-term health care, a University of Illinois legal expert says.
Law professor Richard L. Kaplan says the rise in so-called family caregiver agreements is far from a groundswell, and most people still bristle at the notion of being paid to care for parents or other relatives who may have once cared for them.
BOULDER--Melting of the Greenland ice sheet this century may drive more water than previously thought toward the already threatened coastlines of New York, Boston, Halifax, and other cities in the northeastern United States and in Canada, according to new research led by the National Center for Atmospheric Research (NCAR).
Humans may be programmed by evolution to care about the future of the environment, suggests research published today.
Dr Peter Sozou suggests that individuals may have an innate tendency to care about the long-term future of their communities, over timescales much longer than an individual's lifespan. This in turn may help to explain people's wish to take action over long-term environmental problems.
The findings are published in the Proceedings of the Royal Society B, in a paper entitled Individual and social discounting in a viscous population.
New York, NY, May 27, 2009 – Despite the well-known benefits of having a lifestyle that includes physical activity, eating a diet high in fruits and vegetables, maintaining a healthy weight, moderate alcohol use and not smoking, only a small proportion of adults follow this healthy lifestyle pattern, and in fact, the numbers are declining, according to an article published in the June 2009 issue of The American Journal of Medicine. Lifestyle choices are associated with the risk of cardiovascular disease as well as diabetes.