The introduction of many a new technology has been accompanied by claims that its use results in unforeseen, deleterious health effects — claims that have at times ranged from the completely loopy to the not entirely unfounded. This phenomenon has been particularly prevalent in recent years, as new, "invisible" technologies (e.g., microwave ovens that cook food without flames or heating elements,
Powerset, which implements semantic search, recently released a public beta based on the limited data set of Wikipedia. But while there is no question that Powerset has some interesting and valuable semantic search technology — many of their demo queries produce meaningful summary pages and reference pages with information extracted from Wikipedia content — there are other semantic search engines
SAN FRANCISCO � An American military supercomputer, assembled from components originally designed for video game machines, has reached a long-sought-after computing milestone by processing more than 1.026 quadrillion calculations per second. The new machine is more than twice as fast as the previous fastest supercomputer, the I.B.M. BlueGene/L, which is based at Lawrence Livermore National Laborat
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