Most HPC systems are clusters of shared memory nodes. Parallel programming must combine the distributed memory parallelization on the node interconnect with the shared memory parallelization inside of each node. Various hybrid MPI+OpenMP programming models are compared with pure MPI. Benchmark results of several platforms are presented. This paper analyzes the strength and weakness of several p...

In this paper we tackle the challenging problem of Quality of Service (QoS) routing in multiple domains. We propose a novel inter-domain QoS routing algorithm named HID-MCP. HID-MCP benefits from two major concepts that ensure high performance in terms of success rate and computational complexity. First, HID-MCP is a hybrid algorithm that combines the advantages of pre-computation and on-demand...

Most HPC systems are clusters of shared memory nodes. Parallel programming must combine the distributed memory parallelization on the node inter-connect with the shared memory parallelization inside of each node. The hybrid MPI+OpenMP programming model is compared with pure MPI and compiler based parallelization. The paper focuses on bandwidth and latency aspects, but also whether programming p...

This paper exploits both the interand intra-scale interdependencies that exist in wavelet coe3cients to improve image restoration from noise-corrupted data. Using an over-complete wavelet expansion, we group the wavelet coe3cients with the same spatial orientation at several scales. We then apply the linear minimum mean squared-error estimation to smooth noise. This scheme exploits the inter-sc...

Parallelising ray tracing using a data parallel approach allows arbitrarily large models to be rendered, but its inherent load imbalances may lead to severe inefficiencies. To compensate for the uneven load distribution, demanddriven tasks may be split off and scheduled to processors that are less busy. We use a hybrid scheduling algorithm which brings tasks and data together according to coher...

A 16-core processor with hybrid (i.e., both message-passing and shared-memory) inter-core communication mechanisms are implemented in 90nm CMOS. Shared-memory communication is supported using the shared memory within each cluster and Message-passing communication is enabled in a 3× 6 Mesh packet-switched network-on-chip. The proposed system consists of a direct memory to memory communication be...

Multi-FPGA Boards (MFBs) have been in use for more than a decade for emulation of the digital circuits in many applications. Key feature of an MFB architecture is its inter-FPGA connections. There are two types of inter-FPGA connections namely i) fixed connection (FC)connecting a pair of FPGAs through a dedicated wire between them, ii) programmable connection (PC)connecting a pair of FPGAs thro...

this study was conducted to determine the optimal dietary protein requirement for lemon fin barb hybrid fingerlings. triplicate groups of fish (1.00 ± 0.05 g) were fed twice a day until apparent satiation with five isocaloric (16 kj/g) diets containing varying protein level ranging from 20 to 40% for 60 days. survival was not affected by the dietary protein level. the weight gain and specific g...

We present an analysis and model for evaluation of color shifts in halftone printing caused by inter-separation misregistration for periodic clustered dot halftones. Using a lattice framework, we present intuitive analysis that demonstrates conditions under which the average color is asymptotically invariant under inter-separation misregistration. Combining the framework with an analytic repres...

Carrying out an autonomous object prehension task, needs some active interaction with the environment, which only could be done with sensory integration on the robot tools. A study of the contact force control performed with tactile feedback in a low cost servo-controlled parallel jaw gripper is presented in this article. This gripper integrates matricial tactile sensors and proximity sensors. ...