Net Juggler is an open source library that turns a commodity component cluster running the VR Juggler platform on each node into a single VR Juggler image cluster. Application parallelization is transparent to the user and leads to high performance executions even with limited bandwidth networks.
Two patients in the final stage of dementia of Alzheimer type were stimulated with music, touch and object presentation during 12 consecutive days (16 trials per patient). Evaluations were made by direct observations, analysis of video-taped recordings and registrations of pulse and rate of respiration. Both patients reacted differently to music than to… (More)
In this paper, we present SoftGenLock, an open source software that enables genlock and active stereo on commodity graphics cards. SoftGenLock is implemented on top of Linux. It does not require any hardware modification of the graphics card. Rather than to gain total control on signal generation, which would make the software deeply dependent on the… (More)
Nowadays, most of distributed architectures are easily scalable MIMD (Multiple Instruction streams, Multiple Data streams) parallel computers or networks of workstations. The challenge consists in taking advantage of the power of these architectures. It has been shown that data-parallel languages offer both a programming model easy to understand and several… (More)
—This paper describes a new fast and scalable parallel algorithm to automatically determine catchment basin of rivers in large digital elevation models (DEM for short). This algorithms is based on the construction of a minimal spanning tree, via a hierarchy of graphs, modeling the water route on the DEM. It does not need any preprocessing like stream… (More)
— Distributed applications running on clusters may be composed of several components with very different performance requirements. The FlowVR middleware allows the developer to deploy such applications and to define communication and synchronization schemes between components without modifying the code. While it eases the creation of mappings, FlowVR does… (More)
This paper describes a new fast and scalable parallel algorithm to compute global flow accumulation for automatic drainage network extraction in large digital elevation models (DEM for short). Our method uses the D8 model to compute the flow directions for all pixels in the DEM (except NODATA and oceans). A parallel spanning tree algorithm is proposed to… (More)
Parallelism suffers from a lack of programming languages both simple to handle and able to take advantage of the power of present parallel computers. If parallelism expression is too high level, compilers have to perform complex optimizations leading often to poor performances. One the other hand, too low level parallelism transfers difficulties toward the… (More)