Special purpose computer for N-body problems

Implementing methods of PIC simulation by a special purpose computer system for gravitational N-body problems

Particle In Cell (PIC) simulation using GRAPE-6 (G6), a special-purpose computer for gravitational N-body problems, is demonstrated. The calculation time is decreased by approximately 20 times, as compared to the usual method. There are two problems associated with simulation of plasma by the G6. First, G6 calculates only Coulomb force and three-dimensional (3D) calculations, which means that o...

A special purpose computer for ab initio molecular dynamics simulations

Special Purpose Computer Architectures for High Speed Optimisation

This paper discussed two computationally intensive optimisation algorithms for 0-1 integer programs, namely simulated annealing and branch and bound. It then describes an application specific computing platform designed to accelerate their performance. The paper justifies the general approach and gives details of the algorithms.

Performance Analysis of Direct N-Body Algorithms on Special-Purpose Supercomputers

Direct-summation N -body algorithms compute the gravitational interaction between stars in an exact way and have a computational complexity of O(N2). Performance can be greatly enhanced via the use of special-purpose accelerator boards like the GRAPE-6A. However the memory of the GRAPE boards is limited. Here, we present a performance analysis of direct N -body codes on two parallel supercomput...

Special-Purpose Nickel Alloys

NICKEL-BASE ALLOYS have a number of unique properties, or combinations of properties, that allow them to be used in a variety of specialized applications. For example, the high resistivity (resistance to flow of electricity) and heat resistance of nickel-chromium alloys lead to their use as electric resistance heating elements. The soft magnetic properties of nickel-iron alloys are employed in ...