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1,934 results for “problem-based”
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Research ArticleOpen accessAll words, across the recordPower System Oscillations Damping Using Unified Power Flow Controller-Based StabilizerLokman H. Hassan, M. Moghavvemi, Haider A.F. MohamedProblem statement: The Phillips-Heffron model of a power system with UPFC published by AJAS, demonstrates the effect of the UPFC in improving power system oscillation stability. Unfortunately, some of the equations have not been correctly derived and so working with this model in its existing form is misleading. Approach: In this study, the model is revisited and the equations are … …American Journal of Applied Sciences, Vol. 7, Issue 10 · 31 Oct 2010 · 7,939 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordA System for E-Learning Processes ManagementHassan Mohammed M. ElmetwalyProblem statement: This research deled with difficulties and challenges facing students in their seek to reach specialized courses and curriculums. Approach: It also deled with methodology of facing such challenges and difficulties and hence facilitating process of allowing such data and information to all beneficiaries, either they are student, trainees or educational organization all over the world. Results: E-learning system … …Journal of Computer Science, Vol. 6, Issue 7 · 31 Jul 2010 · 6,927 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordA Good Solution for Household Based on Fast Waste Water Blockage DetectionMohammad Affendy Omardin, Ahmed N. Abdalla, Mohd Helmi Suid, Noraziah AhmadProblem statement: The waste pipes from the wash basin are always flow in with several waste form kitchen preparation. Due to time consideration the pipe may comes through blockage and need blockage maintenance. Approach: This study presented an invention for early warning blockage detection for a kitchen waste water drain pipe. The waste water pipe some be connected through vertical … …American Journal of Applied Sciences, Vol. 7, Issue 7 · 31 Jul 2010 · 7,155 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordDensity Functional Theory Based Quantitative Structure Activity Relationship Study of 2,5-Bis(1-Aziridinyl)-p-Benzoquinones with Lymphoid LeukemiaBahjat A. Saeed, Rita S. EliasProblem statement: QSAR techniques increase the probability of success and reduce time and coast in drug discovery process. The study presented QSAR investigation on 32 bioactive aziridinylbenzoquinones that have activity against lymphoid leukemia. Approach: Molecular descriptors, molecular weight, total energy, hardness, chemical potential, electrophilicity index, HOMO and LUMO energies were calculated. Initial geometry optimizations were carried out with the AM1 … …American Journal of Applied Sciences, Vol. 7, Issue 7 · 31 Jul 2010 · 7,216 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordHistory Based Contention Window Control in IEEE 802.11 MAC Protocol in Error Prone ChannelAli Balador, Ali Movaghar, Sam JabbehdariProblem statement: IEEE 802.11 Medium Access Control (MAC) protocol is one of the most implemented protocols in this network. The IEEE 802.11 controls the access to the share wireless channel within competing stations. The IEEE 802.11 DCF doubles the Contention Window (CW) size for decreasing the collision within contending stations and to improve the network performances but it is not … …Journal of Computer Science, Vol. 6, Issue 2 · 28 Jul 2010 · 7,667 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordTree Based Test Case Generation and Cost Calculation Strategy for Uniform Parametric Pairwise TestingMohammad F.J. Klaib, Sangeetha Muthuraman, Noraziah Ahmad, Roslina SidekProblem statement: Although it is very important to test any system extensively it is usually too expensive to do so owing to the cost and the resources that are involved in it. Software testing is a very important phase of software development to ensure that the developed system is reliable. Some systematic approach for testing is essential to test any … …Journal of Computer Science, Vol. 6, Issue 5 · 31 May 2010 · 7,343 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordA Trust System Based on Multi Level Virus DetectionYasmine H. Abdul-AmirProblem statement: As these detection methods were developed and implemented, the virus developers adapted to the new detectors in ways intended to defeat them. Approach: This study introduced new multilevel virus detection (MDS). Results: This system model depended on an advance behavior blocking technology. It detected virus-code by a behavior approach monitors and determined a virus activity at several protection … …Journal of Computer Science, Vol. 6, Issue 4 · 30 Apr 2010 · 6,857 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordMeasuring Investors' Reaction to the Adoption of International Financial Reporting Standards in Greece, Using a Market-Based ModelAthanasios Vazakidis, Stergios AthianosProblem statement: The aim of this study is to highlight the main differences between International Accounting Standards and Greek accounting, The sample constituted by 90 randomly selected Greek companies which are listed in Athens Stock Exchange were scrutinized concerning the differences in financial figures which have been appeared due to the adoption of IFRS. Approach: The use of capital asset … …American Journal of Economics and Business Administration, Vol. 2, Issue 1 · 31 Mar 2010 · 7,540 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordOptimization of Cutting Parameters Based on Surface Roughness and Assistance of Workpiece Surface Temperature in Turning ProcessAdeel H. Suhail, N. Ismail, S. V. Wong, N. A. Abdul JalilProblem statement: In machining operation, the quality of surface finish is an important requirement for many turned workpieces. Thus, the choice of optimized cutting parameters is very important for controlling the required surface quality. Approach: The focus of present experimental study is to optimize the cutting parameters using two performance measures, workpiece surface temperature and surface roughness. Optimal cutting parameters … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 1 · 31 Mar 2010 · 12,949 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordComparative Study of Different Underfill Material on Flip Chip Ceramic Ball Grid Array Based on Accelerated Thermal CyclingZ. Kornain, A. Jalar, N. Amin et al.Problem statement: This study mainly to study the effect of several commercial underfill materials to the reliability of HiCTE Flip Chip Ceramic Ball Grid Array (FC-CBGA) package due to Accelerated Thermal Cycling (ATC) effect. Approach: The warpage condition of package, die back stress, interfacial die shear stress, and solder bump fatigue for different commercial underfills were assessed and compared via … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 1 · 31 Mar 2010 · 9,200 accessesView PDFCite