Bill Gates on Innovation and Technical vitality

Bill Gates shares his insight on Innovation and Technical vitality – a succinct well written piece. I fully concur with his viewpoint – there is an urgent need for better science education and for reformed immigration policy for “global innovation” and for creating “greater value” (turning ideas into businesses and social welfare opportunities). An excerpt from an update — “The IT industry, I guarantee you,” Gates said, “will be in the U.S. to the degree that these smart people are here in the U.S.”

How to Keep America Competitive

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Three Performance-Limiting Walls

“Three Performance-Limiting Walls” is a term coined to represent the three important limiters of microprocessor performance – power use, memory use, and processor frequency. The three walls consist of – the power wall, the memory wall and the frequency wall. Personally, I think that of these three, the memory wall is the tricky one since it is non-intuitive for us to think of layered memory access rather than the more intuitive flat memory access. This graph nicely summarises the problem. Popular solutions include multi-core architectures, innovative memory architectures (Cell), and fundamental improvments in memory (eDRAM) for example.

Three Performance-Limiting Walls (slides 2-3)

Exploring photos in 3D

Photo Tourism is a project by Microsoft and Washington University in which a 3D model of a scene is generated from various arbitary picures of the same scene/monument and then allows the user to browse through the contributing pictures using the 3D model. See a live demo on the website (link below). Also see a working prototype called PhotoSynth.

Photo tourism