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Half-life Defined

The time required for a radioactive substance to lose 50 percent of its activity by decay. The half-life of the radioisotope plutonium-239, for example, is about 24,000 years. Starting with a pound of plutonium-239, in 24,000 years there will be one-half pound of plutonium-239, in another 23,000 years there will be one-fourth pound, and so on. (A pound of material remains, but it gradually becomes a stable element.)

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Interview: Moved By Mod -- Dear Esther's Dan Pinchbeck

Published July 1, 2009, 6:16 am, Gamasutra

[Unversity of Portsmouth researcher Dan Pinchbeck is the creator of Half-Life 2 interactive story-based mod Dear Esther, somewhat of a sleeper hit in the modding community, and in this interview he discusses its curious inspirations.] I've had Dear Esther on my radar for a while. It sounded incredibly interesting; you are left on an island in the Hebradian range, with a nameless narrator and ...

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MaRS Innovation selects Diabetic Wound Healing Technology from The University of Toronto as its second ...

Published June 30, 2009, 7:34 am, CNW Group via Yahoo! Finance

MaRS Innovation and The University of Toronto are pleased to announce that they have entered into an agreement to collaboratively commercialize a novel sustained release formulation of nitric oxide for applications in wound healing, including diabetic ulcers.

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Climate Change And American Foreign Policy: Security Challenges, Diplomatic Opportunities

Published June 27, 2009, 7:37 am, Foreign Relations

TOM BROKAW: Good afternoon, everyone. I'm Tom Brokaw. I'm very pleased to be hosting today's event, which will feature one of America's most distinguished public servants, Senator John Kerry of Massachusetts. Most of you know his biography by now, obviously.

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2009/06/27

Published June 26, 2009, 5:09 pm, The New Straits Times

CrossTalk: Is nuclear energy the answer? Fresh nuclear debate was stirred earlier this month when Prime Minister Datuk Seri Najib Razak announced in South Korea that Malaysia would be developing a reactor.

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