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Science News for September 17, 2001


Wealth of nations depends on Jack Frost, research finds

Researchers at Purdue University link economic growth to annual hard frosts, finding that temperate areas have historically had less disease and better agricultural productivity. Frost enables the build-up of organic matter in fertile topsoil, allowing for richer agricultural success.

SourcePurdue University·JournalJournal of Economic Growth·DateSep 17, 2001

Study focuses on effects of communal bereavement

Researchers analyzed data from 1973-1995 to find a significant rise in very low birthweight following Prime Minister Olof Palme's murder and ferry Estonia disaster. The study suggests that communal bereavement can affect public health, even if the event is rare or less visible.

SourceAmerican Sociological Association·JournalJournal of Health and Social Behavior·DateSep 17, 2001
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Annals of Internal Medicine Tip Sheet, September 18, 2001

The American College of Physicians announces new standards for manuscript submission, emphasizing author disclosure of sponsor involvement. These revised guidelines, developed by the International Committee of Medical Journal Editors, aim to prevent pharmaceutical companies from controlling study data and results.

SourceAmerican College of Physicians·JournalAnnals of Internal Medicine·DateSep 17, 2001

Supercomputer simulations reveal strongest carbon nanotubes

A team of researchers discovered a new type of carbon nanotube that is approximately 40 percent stronger than other nanotubes made using the same number of atoms. This breakthrough was achieved through supercomputer simulations at the San Diego Supercomputer Center and the University of Michigan.

SourcePenn State·JournalPhysical Review Letters·DateSep 17, 2001

Purple potato boost for organic food industry

Researchers at Newcastle University have discovered a purple potato variety that shows promise in resisting the devastating potato blight disease. The variety, grown commercially without using chemicals, could significantly impact the supply of organically-grown potatoes, improving availability and reducing costs for farmers.

SourceNewcastle University·DateSep 17, 2001
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Change in value of dollar dictates overseas production strategy, says O.R. study; exchange rate often overlooked

A new study by O.R. researchers found that the value of the dollar significantly impacts a company's decision on whether to export or invest in foreign production facilities. In depreciated currencies, strong exports favor the choice of ownership structure, while appreciated currencies favor investments in overseas production.

SourceInstitute for Operations Research and the Management Sciences·JournalManagement Science·DateSep 17, 2001