| http://www.w3.org/ns/prov#value | - According to Dr. Sheffi, the attacks of September 11 provoked him and many of his colleagues to seek a more sober, comprehensive, and probability-conscious view of risk and resilience. ???Before that, I thought about it mostly in financial terms ??? buying insurance against various business risks, buying commodity futures such as oil to hedge against price fluctuations, the use of financial deriva
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