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A new kind of camera, which allows you to take the photo now, and focus later at any point you like. There is demo in the web.
The principle is that, you record not the sum of all the light cones, but the individual light ray's vector direction. So that you can focus to any plane by ray tracing method.
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This is a tutorial on arXiv about how negative refractive index emerges.
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Folding a square sheet of paper into an arbitrary 3D shape is proved to be NP-hard problem. It is proved by transforming the problem into circle packing problem[1].
[1] arxiv.org/abs/1008.1224: Circle Packing for Origami Design Is Hard
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Scientists now attach probes into a living cells, and measure electrical currents from inside.
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Vinay Deolalikar, HP Labs researcher, claimed to have proved NP not equal to P. The website is his homepage in HP. You can find his 103 paper in pdf here. And he said he will post the final version when ready. Here is his email claiming to have solved the problem:
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A great presentation on how to build web applications that attract users and make them feel good.
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This is a great list of articles covering different stages of building an online community. Certainly have to read it if you want to build a successful online community.
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A very good introduction on how to build a online community from an early stage.
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Another industry to watch: shipping. Baltic Dry index falled 31 days non-stop as China's demand for iron cre and steel fall. Shipping experts see no short term rebound in BDI too. Price of other commodities may fall too as China's fixed investment is decreasing.
