The major auction houses Christie's and Sotheby's are both building their own online auction sites to take advantage of the market forged by Ebay and other low-end auction sites. They are counting on their own authenticity guarantees to win bidders. Although Creative Conduit's executives believe it is an authentic Gauguin, they are not planning to offer guarantees. Handheld Museum Ready to Hit the Pavement Blanketed in pavement, American cities can seem a social and architectural palimpsest, callously rewritten by every generation. This month, however, researchers at New York University's Interactive Telecommunications Program will launch Neighborhood Web to let Net historians put an indelible mark on public space by allowing them to tack Web pages to particular buildings.
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Patrizia Marti thinks the perfect tour guide is one who can read your mind. The young researcher and her colleagues at the Multimedia Laboratory at the University of Siena, Italy, built an intelligent, wearable tool that uses a positioning device and a neural network to guess tourists' preferences from their moves and deliver tailor-made information.