Crystallization on a sphere
Abstract We present a parallel simulated annealing algorithm for crystallization of N -body systems. The implementation uses systolic simulated annealing with additional parallel cost function evaluation. We have a hybrid topology which consists of a systolic ring and attached to each ring processor a tree of processors. Our research topic is crystallization of particles on a spherical surface. Some results of the crystallization experiments are presented.
Analytically exact spiral scheme for generating uniformly distributed points on the unit sphere
The problem of constructing a set of uniformly-distributed points on the surface of a sphere, also known as the Thomson problem, has a long and interesting history, which dates back to J.J. Thomson in 1904. A particular variant of the Thomson problem that is of great importance to biomedical imaging is that of generating a nearly uniform distribution of points on the sphere via a deterministic scheme. Although the point set generated through the minimization of electrostatic potential is the gold standard, minimizing the electrostatic potential of one thousand points (or charges) or more remains a formidable task. Therefore, a deterministic scheme capable of generating efficiently and accurately a set of uniformly-distributed points on the sphere has an important role to play in many scientific and engineering applications, not the least of which is to serve as an initial solution (with random perturbation) for the electrostatic repulsion scheme. In the work, we will present an analytically exact spiral scheme for generating a highly uniform distribution of points on the unit sphere.
Transputer systems, ongoing research : WoTUG-15, proceedings of the 15th World Occam and Transputer User Group Technical Meeting, 13-15th April 1992, Aberdeen, Scotland, UK
Message routing systems for transputer based parallel computers, D. Talia an environment for investigating the effectiveness of process migration strategies on transputer-based machines, R. Candlin and J. Philips, evaluation of a set of message-passing routines on transputer networks, W. Cai and D.B. Skillicorn performance modelling of a parallel neural network simulator, T. Tollenaere and D. Roose farming - towards a rigorous definition and efficient transputer implementation, W .Day porting the 3L parallel C environment to the Texas Instruments TMS320C40, A.D. Culloch transputer-based adaptive signal processing, J.J. Soraghan et al a transform accelerator for a transputer system, C.J. Dodge et al a transputer-based active vision system, A.B. Smith and P.H. Welch SYDAMA-2 - a heterogeneous multiprocessor system for real time image processing, D. Stokar general purpose parallel computers - a standard architecture with a standard programming interface, G. Barrett et al an efficient multi-priority scheduler for the transputer, K.M. Shea et al towards an adaptable scheduler for real-time system, C.E. Moron and H. Zedan TCP/IP on transputers - the performance implications, R.M.A. Peel a transputer-based accelerator for digital circuits fault simulation, G.P. Balboni et al formal methods in the design of the T9000, G. Barrett et al how to achieve replication within a CASE tool environment, G.A. Manson et al the PARIX programming environment, Parsytec GmBH an optimized parallel compiler for executing declarative programs on transputer array, Wang Dingxing et al implementation of learning automata on a 128-transputer reconfigurable machine using VCR1.8c (virtual channel router), F. Seredynski et al nonconvex continuous optimization experiments on a transputer system, A. ter Laak et al.