The size and power of the Wald, Edgeworth expansion corrected likelihood-ratio statistic (LRE), and bootstrap tests for Granger causality in integrated-cointegrated VAR systems are considered. By using Monte Carlo methods and simple graphical techniques, the p-value plots, and power-size plots, properties of the tests in two different forms, the standard and the Dolado and Lütkepohl (1996) modi...

The present study was an attempt to investigate the validity of the English section of Iranian Universities PhD Entrance Exam in TEFL. To this end, 15 EFL learners from university of Isfahan who were in their last semester of that MA education were invited to contribute to the study. A group of 5 university lecturers were also asked to support the study as expert judges. A TOEFL reading paper w...

With a growing number of nations interested in planetary exploration, research and development of extraterrestrial rovers have been intensified. The usual practice is to test the performances of rovers on soil simulants on earth, prior to their deployment to extraterrestrial bodies. It is noted that in the tests the soil simulant is subject to the earth gravity, while the terrain on the extrate...

This study was a descriptive study of the correlation type, carried out to find out the relationship between entry qualification and academic performance in two basic schools of nursing in Enugu State, South-East, Nigeria, between 1995 and 1999. The study retrospectively examined the scores of a sample of 390 nursing students. Data were O’ level GCE/SSCE Grades, representing the entry qualifica...

The calibration of a partial discharge measuring system is carried out to determine its scale factor. This operation is performed in the complete test circuit by injecting across the terminals of the device under test a known charge generated by a traceable calibrator. The paper presents the calibration of four different partial discharge measuring systems, carried out by using a programmable r...

A large number of variations of distributed simulation protocols have been proposed in the literature. Their performances, however, could not be compared directly, due to diierent implementation strategies, diierent optimizations and diierent software environments as well as parallel hardware platforms. To rank the protocols accurate enough with respect to their execution performance the only p...

This paper describes a threefold method of testing the performance of an array-based ultrasonic tool for nondestructive testing of spot welds. The tool is described in its capabilities, use, and advantages over existing counterparts. Performance testing is not only described, but results from carrying out the testing are documented as well. The three performance testing methods include the use ...

At the Max Planck Institute for Biological Cybernetics the influence of an augmented system on helicopter pilots with limited flight skills is being investigated. This study would provide important contributions in the research field on personal air transport systems. In this project, the flight condition under study is the hover. The first step is the implementation of a rigid-body dynamic mod...

Automatic performance tuning of computationally intensive kernels in scientific applications is a promising approach to achieving good performance on different computing architectures while preserving the kernel implementation’s readability and portability. A major bottleneck in automatic performance tuning is the computation time required to test a large number of possible code variants, which...