Research ArticleOpen accessIn the abstractOn the Presence of Cascading Effect in the Key Expansion Mechanism of Rijndael-The AESY. Talwar, C.E. Veni Madhavan, Navin RajpalRijndael-The AES is 128-bit block cipher based on an elegant algebraic structure over F28. This cipher employs a simple approach to its substitution, permutation (SP) operations. We take a close look on the Key Expansion Mechanism of Rijndael - The AES. This study highlights on the presence of the cascading effect in its key expansion mechanism. Thus, lowering the brute-force … …Journal of Computer Science, Vol. 2, Issue 2 · 28 Feb 2006 · 6,807 accessesView PDFCite
Research ArticleOpen accessIn the abstractNew Proposed Second-Order ASDM Using OTAsFarouq M. Al TaweelIn this work, we present a new proposal for the second-order Adaptive Sigma Delta Modulation (ASDM). The new proposed Adaptation scheme is based on using Operational Transconductance Amplifier (OTAs) as an Integrator and as an Amplifier to adapt the quantizer step-size to control the voltage gain by feedback the quantizer output through adaptation scheme. The step-size is changing up or … …American Journal of Applied Sciences, Vol. 3, Issue 2 · 28 Feb 2006 · 6,950 accessesView PDFCite
Research ArticleOpen accessIn the abstractWiFi Technology: Future Market Challenges and OpportunitiesAdel I. Al-AlawiComputer networks have played a major role in expanding the operational boundaries in organizations today. Until now traditional methods of networking, which involves computers, wired directly to a hub or switch are the norm. Recent advances in networking technology have made it possible for devices to communicate using various light and wave emitting technologies. WiFi is a perfect example of … …Journal of Computer Science, Vol. 2, Issue 1 · 31 Jan 2006 · 7,799 accessesView PDFCite
Research ArticleOpen accessIn the abstractModeling and Simulation of a Novel Switched Reluctance Motor Drive System with Power Factor ImprovementG. Venkatesan, R. Arumugam, M. Vasudevan et al.This study presents a novel Switched Reluctance Motor (SRM) drive system with power factor improvement. Recently, many of the converters with variable speed drives have no input power factor correction circuits. This results in harmonic pollution of the utility supply, which should be avoided. The effect of power factor variation in terms of harmonic content is also analyzed in this … …American Journal of Applied Sciences, Vol. 3, Issue 1 · 31 Jan 2006 · 7,096 accessesView PDFCite
Research ArticleOpen accessIn the abstractMeasurement of Software Maintainability Using a Fuzzy ModelK. K. Aggarwal, Yogesh Singh, Pravin Chandra, Manimala PuriSoftware maintenance is a task that every development group has to face when the software is delivered to the customers' site, installed and is operational. The time spent and effort required for keeping software operational consumes about 40-70% of cost of entire life cycle. This study proposes a four parameter integrated measure of software maintainability using a fuzzy model. The … …Journal of Computer Science, Vol. 1, Issue 4 · 31 Dec 2005 · 6,957 accessesView PDFCite
Research ArticleOpen accessIn the abstractBDD Path Length Minimization Based on Initial Variable OrderingP. W.C. Prasad, M. Raseen, A. Assi, S. M.N.A. SenanayakeA large variety of problems in digital system design, combinational optimization and verification can be formulated in terms of operations performed on Boolean functions. The time complexity of Binary Decision Diagram (BDD) representing a Boolean function is directly related to the path length of that BDD. In this paper we present a method to generate a BDD with minimum path … …Journal of Computer Science, Vol. 1, Issue 4 · 31 Dec 2005 · 6,504 accessesView PDFCite
Research ArticleOpen accessIn the abstractEfficient Maintenance Scheduler for Near Optimum Utilization of Oil TanksFawaz S. Al-Anzi, Khaled Al-ZamelDue to the entry of Kuwait into WTO and the expected liberalization of petroleum management, the oil market is to become more competitive. However, the space limitation and public increasing awareness of environmental protection issues and stricter regulation passed by Environmental Public Authority (EPA) in Kuwait make the need for full utilization of oil tanks a prime requirement of a … …American Journal of Environmental Sciences, Vol. 1, Issue 4 · 31 Dec 2005 · 6,515 accessesView PDFCite
Research ArticleOpen accessIn the abstractAn Application of Finite Element Modelling to Pneumatic Artificial MuscleR. Ramasamy, M. R. Juhari, M. R. Mamat et al.The purpose of this article was to introduce and to give an overview of the Pneumatic Artificial Muscles (PAMs) as a whole and to discuss its numerical modelling, using the Finite Element (FE) Method. Thus, more information to understand on its behaviour in generating force for actuation was obtained. The construction of PAMs was mainly consists of flexible, inflatable membranes … …American Journal of Applied Sciences, Vol. 2, Issue 11 · 30 Nov 2005 · 7,663 accessesView PDFCite
Research ArticleOpen accessIn the abstractWork Performance of MB Trac 900 Tractor on Mountains Terrain in TurkeyTolga Ozturk, Murat DemirThe forestry works mainly involves such various stages as growing, protection, production, wood harvesting, marketing and utilization of forest products. Wood harvesting is performed by completion of cutting, extraction and transporting stages. The most obvious feature of wood harvesting is that the operations are done under various weather conditions open in the field. The measurements and observations were made on … …American Journal of Applied Sciences, Vol. 2, Issue 1 · 31 Jan 2005 · 7,314 accessesView PDFCite