With the emergence of many-core processor architectures onto the HPC scene, concerns arise regarding the performance and productivity of numerous existing parallel-programming tools, models, and languages. As these devices begin augmenting conventional distributed cluster systems in an evolving age of heterogeneous supercomputing, proper evaluation and profiling of many-core processors must occ...

We describe a large scale study of planners and their performance: 28 planners on 4726 benchmark problems. In the first part of the paper, we apply off-the-shelf machine learning techniques to learn models of the planners’ performance from the data. In the evaluation of these models, we address the critical question of whether accurate models can be learned from easily extractable problem featu...

As the most widely used reliable transport in today’s Internet, TCP has been extensively studied in the past decade. However, previous research usually only considers a small or medium number of concurrent TCP connections. The TCP behavior under many competing TCP flows has not been sufficiently explored. In this paper 1, we use extensive simulations to systematically investigate the performanc...

Mobile ad-hoc networks are making a new class of mobile applications feasible. They benefit from the fast deployment and reconfiguration of the networks, are mainly characterized by the need to support many-to-many interaction schema within groups of cooperating mobile hosts and are likely to use replication of data objects to achieve performances and high data availability. This strong group o...

Markowitz model is the first modern formulation of portfolio optimization problem. Relyingon historical return of stocks as basic information and using variance as a risk measure aretow drawbacks of this model. Since Markowitz model has been presented, many effortshave been done to remove theses drawbacks. On one hand several better risk measures havebeen introduced and proper models have been ...

in the recent years, the universities have been worried about performance management more than ever. in the present complex and competitive universe, the success of universities is impossible without presence of proper strategy and methods for evaluating their level of achievements. the balanced scorecard method is a model of evaluating performance and a system of strategic management. the main...

driving is a complex psychomotor task involving distinct cognitive, perceptual and decision making skills. it needs to more concentration and alertness to driving safe. several studies have shown the potential effects of alcohol in crash production by epidemiological and laboratory analysis. alcohol is obviously the most common single cause of traffic accidents in america. a review of the relat...