منابع مشابه
The Upside of Slackers
Are slackers a drag on the rest of us? It makes sense because those who produce (‘‘co-operators’’) benefit everyone, whereas those who don’t produce (‘‘cheats’’) get a free ride. In yeast, for instance, most strains are co-operators, secreting an enzyme called invertase that converts sucrose into the more efficiently metabolized glucose. However, about a tenth of strains are cheats that do not ...
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We formalize a problem we call combinatorial pair testing (CPT), which has applications to the identification of uncooperative or unproductive participants in pair programming, massively distributed computing, and crowdsourcing environments. We give efficient adaptive and nonadaptive CPT algorithms and we show that our methods use an optimal number of testing rounds to within constant factors. ...
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cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
Desperately seeking an upside.
Oncology Nursing Society (ONS) Executive Director Bridget Culhane, RN, MN, MS, CAE, uses e-mail technology to good effect. She has established a list of ONS leaders and groups to whom she can send periodic e-mail alerts about information of particular interest or in need of immediate attention. A few weeks ago, she notified us of the impending publication of an important article in the New Engl...
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ژورنال
عنوان ژورنال: PLoS Biology
سال: 2010
ISSN: 1545-7885
DOI: 10.1371/journal.pbio.1000487