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279,031 articles from PhysOrg

Cornell releases two new raspberry varieties

With its two newest raspberry releases, Big Red is going gold and crimson. Double Gold and Crimson Night offer small-scale growers and home gardeners showy, flavorful raspberries on vigorous, disease resistant plants.

Improved adult-derived human stem cells have fewer genetic changes than expected

A team of researchers from Johns Hopkins University and the National Human Genome Research Institute has evaluated the whole genomic sequence of stem cells derived from human bone marrow cells—so-called induced pluripotent stem (iPS) cells—and found that relatively few genetic changes occur during stem cell conversion by an improved method. The findings, reported in the March issue of...

International team to demonstrate first heralded single-photon generation from a silicon chip

An international consortium of researchers has overcome an important barrier to the generation of single photons using a tiny, chip-scale device constructed from the most widely used material underpinning modern electronics: silicon. Their findings could hasten the advent of devices for quantum communication, ultra-low-power computing and other technologies now that all three basic components...

New study shows "undecideds" not impartial

As the U.S. presidential election approaches, political analysts are paying a lot of attention to the undecided. New research by a team of psychologists from Canada, Italy and Switzerland shows that undecideds are not impartial, but instead reveal a preference for information that confirms their gut reactions.

Parasites boost advantage in sibling war

(Phys.org) -- Parasites may increase inequality among baby birds in a brood by making it even harder for smaller, weaker chicks to compete against their bigger brothers and sisters, researchers have discovered.

Radical changes needed to quench the world's thirst

Korea pushes research and development for global water market. Busan, a city of almost 4 million and host of the IWA World Water Congress and Exhibition, will be operating the world’s largest seawater reverse osmosis plant of its kind in 2013.

Goddard collaborates with international partners on Magnetospheric Multiscale instrument

Whether it's a giant solar flare or a beautiful green-blue aurora, just about everything interesting in space weather happens due to a phenomenon called magnetic reconnection. Reconnection occurs when magnetic field lines cross and create a burst of energy. These bursts can be so energetic they could be measured in megatons of TNT. To study this phenomenon, NASA is readying a fleet of four...

Key lessons from history on alcohol taxes

Steep rises in taxes on alcohol do not necessarily reduce consumption, according to research funded by the Economic and Social Research Council (ESRC) into the history of intoxicants in 16th and 17th England.

Middle class woe

the American middle class has been battered by the loss of well-paying jobs for the 70 percent of the workforce without a college degree and failed by would-be protectors in government and private institutions, said panelists at the 35th Anniversary Forum of the Harvard Institute for Learning in Retirement on Friday.

The hidden cost of cannabis

(Phys.org) -- Around £200m of electricity is being stolen every year to run illegal cannabis farms across the UK. Phil Butler, Co-Director of Newcastle University’s Centre for Cybercrime and Computer Security (CCCS), says this would be enough electricity to provide free energy for every household in Newcastle for a whole year.

Virginia Tech announces 2012 football helmet ratings; 2 more added to the 5-star mark

Virginia Tech released today the results of its 2012 rating for adult football helmets that is designed to assess a helmet's ability to reduce the risk of concussion. A total of three helmets achieved a "5 star" mark, which is the highest rating awarded by the Virginia Tech Helmet Ratings™. In addition to the Riddell Revolution Speed, which was the only helmet to receive 5 stars last year,...

Groupon replaces 2 directors

(AP) -- Online deals company Groupon Inc. said Monday that it will replace two board members with executives from American Express Co. and accounting firm Deloitte LLP.