The implementation and performance evaluation of N-body gravitational simulation algorithm on high-performance computers

2000 ◽  
Vol 26 (3-4) ◽  
pp. 297-316
Author(s):  
Abdullah I. Almojel
Keyword(s):  
Performance Evaluation ◽  
High Performance ◽  
Simulation Algorithm ◽  
And Performance ◽  
High Performance Computers

scholarly journals High-Performance Workwear for Coal Miners in Northern China: Design and Performance Evaluation

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ying Ke ◽  
Qing Zheng ◽  
Faming Wang ◽  
Min Wang ◽  
Yi Wang
Keyword(s):  
Performance Evaluation ◽  
Thermal Comfort ◽  
High Performance ◽  
Northern China ◽  
Coal Miners ◽  
Climate Chamber ◽  
Local Skin ◽  
Worker Performance ◽  
And Performance ◽  
Skin Temperatures

Abstract The design of workwear has significant effects on worker performance. However, the current workwear for coal miners in Northern China is poor in fitness and thermal comfort. In this study, new workwear (NEW) for coal miners was developed with the design features providing better cold protection and movement comfort performance, as compared with a commonly worn workwear (CON). To evaluate the effectiveness of NEW, we conducted human trials which were performed using simulated work movements (i.e., sitting, shoveling, squatting, and crawling) in a climate chamber (10°C, 75% RH). Physiological measurements and perceptual responses were obtained. The results demonstrated that the local skin temperatures at chest, scapula, thigh, and calf; mean skin temperatures,; and thermal comfort in NEW were significantly higher than those in CON. NEW also exerted an improvement in enhancing movement comfort. We conclude that NEW could meet well with the cold protective and mobility requirements.

Communication Performance Evaluation of the Locally Twisted Cube

2020 ◽  
Vol 31 (02) ◽  
pp. 233-252
Author(s):  
Yuejuan Han ◽  
Lantao You ◽  
Cheng-Kuan Lin ◽  
Jianxi Fan
Keyword(s):  
Performance Evaluation ◽  
Interconnection Networks ◽  
High Performance ◽  
Communication Performance ◽  
Wide Diameter ◽  
Fault Diameter ◽  
Twisted Cube ◽  
Hypercube Network ◽  
High Performance Computers ◽  
Important Variant

The topology properties of multi-processors interconnection networks are important to the performance of high performance computers. The hypercube network [Formula: see text] has been proved to be one of the most popular interconnection networks. The [Formula: see text]-dimensional locally twisted cube [Formula: see text] is an important variant of [Formula: see text]. Fault diameter and wide diameter are two communication performance evaluation parameters of a network. Let [Formula: see text]), [Formula: see text] and [Formula: see text] denote the diameter, the [Formula: see text] fault diameter and the wide diameter of [Formula: see text], respectively. In this paper, we prove that [Formula: see text] if [Formula: see text] is an odd integer with [Formula: see text], [Formula: see text] if [Formula: see text] is an even integer with [Formula: see text].

scholarly journals AN ASSOCIATIVE DATA PARALLEL COMPILATION MODEL FOR TIGHT INTEGRATION OF HIGH PERFORMANCE KNOWLEDGE RETRIEVAL AND COMPUTING

1994 ◽  
Vol 03 (01) ◽  
pp. 97-125 ◽  
Author(s):  
ARVIND K. BANSAL
Keyword(s):  
Performance Evaluation ◽  
High Performance ◽  
Loose Coupling ◽  
Abstract Machine ◽  
Data Movement ◽  
Left Hand ◽  
Low Level ◽  
Data Parallel ◽  
Data Alignment ◽  
And Performance

Associative Computation is characterized by intertwining of search by content and data parallel computation. An algebra for associative computation is described. A compilation based model and a novel abstract machine for associative logic programming are presented. The model uses loose coupling of left hand side of the program, treated as data, and right hand side of the program, treated as low level code. This representation achieves efficiency by associative computation and data alignment during goal reduction and during execution of low level abstract instructions. Data alignment reduces the overhead of data movement. Novel schemes for associative manipulation of aliased uninstantiated variables, data parallel goal reduction in the presence multiple occurrences of the same variables in a goal. The architecture, behavior, and performance evaluation of the model are presented.

Parallelization and Performance Evaluation of an Edge Detection Algorithm on a Streaming Multi-Core Engine

2009 ◽  
Vol 2 (4) ◽  
pp. 81-91 ◽  
Author(s):  
Hashir Karim Kidwai ◽  
Fadi N. Sibai ◽  
Tamer Rabie
Keyword(s):  
Performance Evaluation ◽  
Edge Detection ◽  
High Performance ◽  
Detection Algorithm ◽  
Cell Processor ◽  
Edge Detector ◽  
Processing Application ◽  
Image Processing Application ◽  
Host Processor ◽  
And Performance

In the world of multi-core processors, the STI Cell Broadband Engine (BE) stands out as a heterogeneous 9-core processor with a PowerPC host processor (PPE) and 8 synergic processor engines (SPEs). The Cell BE architecture is designed to improve upon conventional processors in graphics and related areas by integrating 8 computation engines each with multiple execution units and large register sets to achieve a high performance per area return. In this paper, we discuss the parallelization, implementation and performance evaluation of an edge detection image processing application based on the Roberts edge detector on the Cell BE. The authors report the edge detection performance measured on a computer with one Cell processor and with varying numbers of synergic processor engines enabled. These results are compared to the results obtained on the Cell’s single PPE with all 8 SPEs disabled. The results indicate that edge detection performs 10 times faster on the Cell BE than on modern RISC processors.

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