We present solutions to statically load-balance scatter operations in parallel codes run on grids. Our load-balancing strategy is based on the modi cation of the data distributions used in scatter operations. We study the replacement of scatter operations with parameterized scatters, allowing custom distributions of data. The paper presents: 1) a general algorithm which nds an optimal distribut...

A new semi-empirical seven-parameter BRDF model is developed in the UV band using experimentally measured data. The model is based on the five-parameter model of Wu and the fourteen-parameter model of Renhorn and Boreman. Surface scatter, bulk scatter and retro-reflection scatter are considered. An optimizing modeling method, the artificial immune network genetic algorithm, is used to fit the B...

We proposed and implemented a novel clustering algorithm called LAIR2, which has linear worst-case time complexity and constant running time average for on-the-fly Scatter/Gather browsing [4]. Our previous experiments showed that when running on a single processor, the LAIR2 on-line clustering algorithm was several hundred times faster than the parallel Buckshot algorithm running on multiple pr...