Current Issue : July - September Volume : 2011 Issue Number : 3 Articles : 6 Articles
We propose a novel strategy to optimize the test suite required for testing both hardware and software in a production line. Here, the strategy is based on two processes: Quality Signing Process and Quality Verification Process, respectively. Unlike earlier work, the proposed strategy is based on integration of black box and white box techniques in order to derive an optimum test suite during the Quality Signing Process. In this case, the generated optimal test suite significantly improves the Quality Verification Process. Considering both processes, the novelty of the proposed strategy is the fact that the optimization and reduction of test suite is performed by selecting only mutant killing test cases from cumulating t-way test cases. As such, the proposed strategy can potentially enhance the quality of product with minimal cost in terms of overall resource usage and time execution. As a case study, this paper describes the step-by-step application of the strategy for testing a 4-bit Magnitude Comparator Integrated Circuits in a production line. Comparatively, our result demonstrates that the proposed strategy outperforms the traditional block partitioning strategy with the mutant score of 100% to 90%, respectively, with the same number of test cases....
Mixed Reality (MR) technology can create an environment where objects from the digital and real worlds can be combined together in a real time manner. The practical contribution of this paper is a structured and iterative methodology developed for mapping appropriate Mixed Reality technology to a specific architecture, engineering, and construction (AEC) task. To increase the likelihood of success in technology transfer, this methodology for developing user-centered, performance enhancing MR-based systems is formulated, where AEC tasks are generically analyzed and categorized according to common functional features, which could be mapped to a collection of suitable or required MR-related technology strategies. Also, a technology selection process is identified to choose appropriate technology characteristics including information representations, interaction methods and, tracking technology for a specific task category. Such a thorough mapping methodology can be used to guide new MR-based system design as well as to help evaluate existing systems....
Main purpose of this paper is to study facial feature based human head position detection. The facial feature extraction methods suitable for a real-time system are considered. Based on the literature survey, an experimental head tracking and pose estimation system is implemented in this paper. An efficient method based on skin detection model, gray-scale morphology and a geometrical face model are applied to detect roughly the face region such as eyes and nose in this project and extract facial features such as eyes point and nose tip. The system automatically initializes whenever the face of a driver is detected. After successful face detection, the tracker is started. The extended three point algorithm is utilized for tracking and estimation of the 3-D pose of the moving head in an image sequence. During tracking the correspondences between a rigid head model and three extracted facial features (eyes and nose) are used to solve the pose....
We implement relatively new analytical technique, the Homotopy perturbation method, for solving nonlinear fractional partial differential equations arising in predator-prey biological population dynamics system. Numerical solutions are given, and some properties exhibit biologically reasonable dependence on the parameter values. And the fractional derivatives are described in the Caputo sense....
Artificial neural networks (ANNs) are a form of artificial intelligence that has proved to provide a high level of competency in solving many complex engineering problems that are beyond the computational capability of classical mathematics and traditional procedures. In particular, ANNs have been applied successfully to almost all aspects of geotechnical engineering problems. Despite the increasing number and diversity of ANN applications in geotechnical engineering, the contents of reported applications indicates that the progress in ANN development and procedures is marginal and not moving forward since the mid-1990s. This paper presents a brief overview of ANN applications in geotechnical engineering, briefly provides an overview of the operation of ANN modeling, investigates the current research directions of ANNs in geotechnical engineering and discusses some ANN modeling issues that need further attention in the future, including model robustness; transparency and knowledge extraction; extrapolation; and uncertainty....
A novel technological method to improve the quality factor (Q) of RF integrated inductors for wireless applications is presented in this article. A serious reduction of substrate losses caused by capacitive coupling is provided. This is realised by removing the oxide layers below the coils with optimized under-etching techniques. This special etching procedure is used to establish an environment in the inductor substructure with very low permittivity. A set of solid oxide-metal-columns placed below the metal windings stabilizes the coil and prevents the hollowed out structure from mechanical collapse. The oxide capacitance is lowered significantly by the reduction of the permittivity r from values around 4 to nearly 1. Capacitive coupling losses into substrate are decreasing in the same ratio. The resulting maximum Q-factors of the new designs are up to 100% higher compared to the same devices including the oxide layers, but shifted significantly to higher frequencies. Improvements of Q from 10 up to 15 have been obtained at a frequency of 3 GHz for a 2.2 nH inductor with an outer diameter of 213 µm. Coils with different layouts and values for inductance (L) were verified and showed similar results....
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