James B. Armstrong

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A tutorial overview of how selected computer-vision-related algorithms can be mapped onto reconfigurable parallel-processing systems is presented. The reconfigurable parallel-processing system assumed for the discussions is a multiprocessor system capable of mixed-mode parallelism; that is, it can operate in either the SIMD or MIMD modes of parallelism and(More)
A method to migrate a task dynamically from a virtual SPMD machine to a virtual SIMD machine is proposed. It is assumed that the SIMD and SPMD virtual machine models only differ to support the different modes of parallelism, and that the program was coded in a mode-independent programming language. The migration pro­ cedure does not require the SPMD PEs to(More)
Performance of a parallel algorithm on a parallel machine depends not only on the time complexity of the algorithm, but also on how the underlying machine supports the fundamental operations used by the algorithm. This study analyzes various mappings of image correlation algorithms in SIMD, MIMD, and mixed-mode environments. Experiments were conducted on(More)
Performance of a parallel algorithm on a parallel machine depends not only on the time complexityof the algorithm, but also on how the underlying machine supports the fundamental operations used by the algorithm. This study analyzes various mappings of image correlation algorithms in SIMD, MIMD, and mixed-mode environments. Experiments were conducted on the(More)
The objectives of this investigation were to develop a scale to measure attitudes towards animal use, decide upon the number of dimensions or scales needed, and test the reliability and validity of the dimension(s) obtained. Analysis showed the final scale to be unidimensional with evidence of reliability (Cronbach alpha = .99) and criterion validity via(More)
A mixed-mode parallel machine's processing elements are capable of operating in and switching between the SIMD and MIMD modes of parallelism. This paper analyzes various mappings of image correlation algorithms onto a mixed-mode parallel processing system. The trade-offs that exist between the SIMD and MIMD modes are the primary basis employed in comparing(More)
Density, morphometrics, and disease prevalence of raccoon populations were determined in 4 habitats (agriculture, riverine, managed, and forested) in central Alabama. In addition we monitored 71 collared raccoons to determine survival. Density estimates were similar in the agriculture (ag) and riverine habitats in central Alabama with 8 raccoons/km 2 , and(More)