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First IFIP TC6/W G 8.8/ WG 11.2 International Workshop, WISTP 2007, 1st IFIP TC6/W G 8.8/ WG 11.2 International Workshop, WISTP 2007, IFIP TC6/W G 8.8/ WG 11.2 International Workshop, WISTP 2007, and WISTP 2007