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Medicine

Why Doesn't Exercise Lead To Weight Loss? 978

Posted by timothy from the that-would-be-too-easy dept.
antdude writes "The New York Times' Well blog reports that 'for some time, researchers have been finding that people who exercise don't necessarily lose weight.' A study published online in September 2009 in The British Journal of Sports Medicine was the latest to report apparently disappointing slimming results. In the study, 58 obese people completed 12 weeks of supervised aerobic training without changing their diets. The group lost an average of a little more than seven pounds, and many lost barely half that. How can that be?"
Wireless Networking

Submission + - How bad can wifi be?

Submitted by Anonymous Coward
An anonymous reader writes: Last night in the UK, the BBC broadcast an alarmist Panorama news programme that suggested wireless networking might be damaging our health. Their evidence? Well, they admitted there wasn't any, but they made liberal use of the word "radiation" (to most ordinary people, radiation=nuclear), along with scary graphics of pulsating wifi base stations (!). They rounded-up a handful of worried scientists, but ignored the majority of those who believe wifi is perfectly harmless. Some quotes from the BBC News website companion piece: "The radiation Wi-Fi emits is similar to that from mobile phone masts ... children's skulls are thinner and still forming and tests have shown they absorb more radiation than adults". What's the science here? Can skulls really "absorb" EM radiation? The wifi signal is in the same part of the EM spectrum as cellphones but it's not "similar" to mobile phone masts, is it? Isn't a phone mast several hundred/thousand times stronger? Wasn't safety considered when they drew up the 802.11 specs?
Math

Submission + - A Mighty Number Falls

Submitted by space_in_your_face
space_in_your_face writes: Mathematicians and number buffs have their records. And today, an international team has broken a long-standing one in an impressive feat of calculation. On March 6, computer clusters from three institutions — the EPFL, the University of Bonn and NTT in Japan — reached the end of eleven months of strenuous calculation, churning out the prime factors of a well-known, hard-to-factor number that is a whopping 307 digits long.

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