Dan L. Clark

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Parallel Virtual Machine (PVM) is a widely-used software system that allows a heterogeneous set of parallel and serial UNIX-based computers to be programmed as a single message-passing parallel machine. In this paper, an extension to PVM to support dynamic process migration is presented. Support for migration is important in general-purpose workstation(More)
During a 30-month-period, 184 very low birth weight infants from two Liverpool neonatal intensive care units were screened for evidence of retinopathy of prematurity (ROP). Seventeen clinical variables previously considered relevant to the development of ROP, blood gas and blood pressure data over the first 7 days, and the maximum stage of ROP reached in(More)
We report on the case of a young lady on oral contraceptives for only 1 month who experienced severe central abdominal pain of a progressive nature. Mesenteric vein thrombosis was diagnosed by ultrasound and confirmed by magnetic resonance imaging. The patient was treated initially with streptokinase followed by heparin and warfarin with subjective(More)
In using a shared network of workstations for parallel processing, it is not only important to consider heterogeneity and differences in processing power between the workstations but also the dynamics of the system as a whole. In such a computing environment where the use of resources vary as other applications consume and release resources, intelligent(More)