Speaker

Prof. Mark A. Novotny, Department of Physics and Astronomy,

Mississippi State University

Contents

Discrete Event Simulations (DES) are used in a large number of scientific, engineering, military, and manufacturing applications. Our driving application is to use a type of DES known as dynamic Monte Carlo to study the dynamics of models of nanoscale ferromagnets. I will introduce DES, and the idea of ’virtual time’ which is used in parallel DES (PDES) simulations. The importance of avoiding causality violations in PDES will be described, and the conservative

approach to causality violations introduced. One important question to be addressed is the scalability of PDES algorithms, i.e. the computer simulation time required as the number of processing elements and the problem size grow. A connection between non-equilibrium surface science and the PDES ’virtual time’ allows questions of scalability to be addressed. For example, we have proven in any dimension that ALL conservative short-ranged PDES are scalable for the computation portion of the algorithm. This is independent of the specific PDES problem. Methods related to network theory to smooth rough virtual times to make both the computation and the measurement portions of ALL short-ranged PDES scalable will be described.

Time

Friday, 8 July 2011, 11:00

Venue

Jülich Supercomputing Centre, Besprechungsraum 1, building 16.3, room 107

Announcement as PDF