Computational Science - ICCS 2007, 7th International Conference Beijing

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Research Title: 
Use of Parallel Simulated Annealing for Computational Modeling of Human Head Conductivity
Adnan Salman
Allen D. Malony
Sergei Turovets
Don M Tucker
Sun, 2007-05-27
Research Abstract: 
We present a parallel computational environment used to determine conductivity properties of human head tissues when the effects
of skull inhomogeneities are modeled. The environment employs a parallel simulated annealing algorithm to overcome poor convergence
rates of the simplex method for larger numbers of head tissues required for accurate modeling of electromagnetic dynamics
of brain function.To properly account for skull inhomogeneities, parcellation of skull parts is necessary. The multi-level
parallel simulated annealing algorithm is described and performance results presented. Significant improvements in both convergence rate and speedup are achieved. The simulated annealing algorithm was successful in extracting conductivity values for up to thirteen head tissues without showing computational deficiency.