Vijay Subramani

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Even though middleware support for grid computing has been the subject of extensive research, scheduling policies for the grid context have not been much studied. In addition to processor utilization, it is important to consider the response times of jobs in evaluating the performance of grid scheduling strategies. In this paper we propose distributed(More)
Although there is wide agreement that backfilling produces significant benefits in scheduling of parallel jobs, there is no clear consensus on which backfilling strategy is preferable-should conservative backfilling be used or the more aggressive EASY backfilling scheme. Using trace-based simulation, we show that if performance is viewed within various job(More)
Although there is wide agreement that backfilling produces significant benefits in scheduling of parallel jobs, there is no clear consensus on which backfilling strategy is preferable e.g. should conservative backfilling be used or the more aggressive EASY backfilling scheme; should a First-Come First-Served(FCFS) queue-priority policy be used, or some(More)
In this paper, we evaluate the performance implications of using a buddy scheme for contiguous node allocation, in conjunction with a backfilling job scheduler for clusters. When a contiguous node allocation strategy is used, there is a trade-off between improved run-time of jobs (due to reduced link contention and lower communication overhead) and(More)
Although theoretical results have been established regarding the utility of pre-emptive scheduling in reducing average job turnaround time, job suspension/restart is not much used in practice at supercomputer centers for parallel job scheduling. A number of questions remain unanswered regarding the practical utility of pre-emptive scheduling. We explore(More)
The authors report the distribution of acetylcholinesterase activity and catecholamine fluorescence in the intact and completely transected rat spinal cord. The catecholamine terminals were scarce in the posterior horn and abundant in the intermediale and anterior horn regions. In the thoracic region, intense amine fluorescence was seen in the(More)
The ultrastructural studies have shown three types of motor endings in the macaque intrafusal fibers: 1) unindented axon terminals with smooth or shallowly folded postsynaptic membrane; 2) indented terminals with few postsynaptic folds; and 3) indented terminals with heavily folded postsynaptic membrane. The terminals on bag 1 and chain fibers were(More)
Caffeine contractures were recorded from thin bundles and whole extensor digitorum longus (EDL) and soleus muscles of rat, and correlated with preparation size and fiber types. Thin bundles were more sensitive to caffeine and halothane than whole muscles, and bundles of 100% type I fibers were more sensitive than bundles of 100% type II fibers. Magnitude of(More)
The human intrafusal fibers have two major types of attachments: (1) extracapsular, involving the bag and long chain fibers which tapered into the extrafusal endomysium; and (2) intracapsular, involving only the short chain fibers which attached to the outer or inner capsule as well as to the bag, and other chain fibers. At all the attachment sites except(More)