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Many problems with today's Internet routing infrastructure--slow BGP convergence times exacerbated by timer-based route scanners, the difficulty of evaluating new protocols--are not architectural or protocol problems, but software problems. Router software designers have tackled scaling challenges above all, treating extensibility and latency concerns as(More)
This paper describes an implementation of the class based queueing (CBQ) mechanisms proposed by Sally Floyd and Van Jacobson 1] 2] to provide real time policies for packet forwarding. CBQ allows the traac ows sharing a data link to be guaranteed a share of the bandwidth when the link is congested, yet allows exible sharing of the unused bandwidth when the(More)
A Shack-Hartmann wavefront sensor was modified to allow measurement of ocular aberrations in downward gaze with binocular fixation. Subjects first performed a control task prior to four different trials involving a distance task or a near task (accommodative demand of 2.5 D) performed in primary and downward gaze (25°). Immediately after beginning and then(More)
A cluster obtained in high yield from the reduction of a silver-thiolate precursor, Ag-SCH(2)CH(2)Ph, exhibited a single sharp peak near 25 kDa in the matrix-assisted laser desorption mass spectrum (MALDI MS) and a well-defined metal core of ~2 nm measured with transmission electron microscopy (TEM). The cluster yields a single fraction in high-performance(More)
PURPOSE The purpose of the study was to investigate the changes in axial length occurring with shifts in gaze direction. METHODS Axial length measurements were obtained from the left eye of 30 young adults (10 emmetropes, 10 low myopes, and 10 moderate myopes) through a rotating prism with 15° deviation, along the foveal axis, using a noncontact optical(More)