We describe a collaborative virtual environment system for visualization of diffusion magnetic resonance imaging scans. The system represents the 3D data by arrays of polyhedra, coloured by the degree of anisotropy and directed by the principal component of the diffusion tensor. Users can then collaboratively explore the data and interactively spawn tractography procesess that compute tracks th...

A Large Eddy Simulation code based on a non-orthogonal, multiblock, finite volume approach with co-located variable storage, was ported to three different parallel architectures: a Cray T3E/1200E, an Alpha cluster and a PC Beowulf cluster. Scalability and parallelisation issues have been investigated, and merits as well as limitations of the three implementations are reported. Representative LE...

High performance computing (HPC) clusters provide increased performance by splitting the computational tasks among the nodes in the cluster and have been commonly used to study scientific computing applications. These clusters are cost effective, scalable and run standard software libraries such as MPI which are specifically designed to develop scientific application programs on HPC. They are a...

Computational Physics Numerical modeling represents an important tool to fulfil the objectives of the group and two domains of application are presently covered: Calculation of radiation fields and Modelling of cold plasmas for material processing. Along with these applications, the group is also involved in improving the available computational capacity with the build up of a Beowulf cluster f...

Agent-based simulation of large multicellular biological systems has become a viable option owing to affordable parallel computers, such as Beowulf-style clusters. We describe a scalable modular software platform that (i) provides for an easy integration of different solvers computing internal dynamics of the cells, and (ii) dynamically adapts to the changing loads on the cluster nodes using a ...

Pandemic Covid-19 forced education sector to have no more face-to-face classes since 2020. Unluckily, students from drama longer performed on the stage even though they well-prepared for performance. This article highlighted four main problems: 1) How creative were in writing script virtual performance? 2) What innovative processes created by 3) problem faced and performing 4) lecturers’ role T...

Analytical arguments and numerical simulations suggest that the shapes of 3D microwave ionization curves measured by Koch and collaborators (see P. weakly on the angular momentum of the atoms in the initial microcanonical ensemble, but strongly on the principal quantum number and the magnetic quantum number. Based on this insight, coupled with the computational power of a high-end 60-node Beowu...

Current job scheduling systems for massively parallel machines and Beowulf-class compute clusters support batch scheduling involving two classes of queues: prime time vs. non-prime time. Jobs running in these queue classes must satisfy different criteria with respect to jobsize, runtime, or other resource needs. These constraints are designed to delay big jobs to non-prime time in order to prov...

We report on work to parallelize QC-lib, a C++ library for the simulation of quantum computers at an abstract functional level. After a brief introduction to quantum computing, we give an outline of QClib, then describe its parallelization using MPI, and present performance measurements made on a Beowulf cluster. Using more processors allowed larger problems to be solved, and reasonable speedup...