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133 results for “Power Quality”

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Research ArticleOpen accessIn the abstractAnalytical Study of Signal-to-Noise Ratio for Visible Light Communication by Using Single SourceMohammad Syuhaimi Ab-Rahman, Nurain Izzati Shuhaimi, Luqman Al-Hakim Azizan, Mazen Radhe HassanProblem statement: In this study, optical wireless communication system using visible light is studied for indoor application. Approach: The process started with the calculation on performance of single source white LED where received power, channel DC gain and quality of data transmission (SNR computation) are identified. Through the simulation results, the SNR performance is directly proportional to angle of incident … …Journal of Computer Science, Vol. 8, Issue 1 · 2 Nov 2011 · 7,479 accessesView PDFCite
Research ArticleOpen accessIn the abstractGinger Supplementation Enhances Working Memory of the Post-Menopause WomenNaritsara Saenghong, Jintanaporn Wattanathorn, Terdthai Tong-Un et al.Problem statement: Cognitive impairment is one important problem in post-menopausal women. Although hormone therapy can improve this condition, it also produces adverse effect. Recent findings showed that this condition could be mitigated by the herb. Ginger or Zingiber officinale Roscoe, a plant in a family of Zingiberaceae, was previously demonstrated the neuroprotection and cognitive enhancing effects. Therefore, this study was … …American Journal of Applied Sciences, Vol. 8, Issue 12 · 10 Oct 2011 · 10,065 accessesView PDFCite
Research ArticleOpen accessIn the abstractSurface Electromyography-Based Facial Expression Recognition in Bi-Polar ConfigurationMahyar Hamedi, Sh-Hussain Salleh, Tan Tian Swee, KamarulafizamProblem statement: Facial expression recognition has been improved recently and it has become a significant issue in diagnostic and medical fields, particularly in the areas of assistive technology and rehabilitation. Apart from their usefulness, there are some problems in their applications like peripheral conditions, lightening, contrast and quality of video and images. Approach: Facial Action Coding System (FACS) and some … …Journal of Computer Science, Vol. 7, Issue 9 · 25 Jul 2011 · 9,943 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Novel Approach to Medical Image SegmentationNandagopalan Shanmugam, Adiga B. Suryanarayana, Sudarshan TSB et al.Problem statement: Segmentation is a vital aspect of medical imaging. It aids in the visualization of medical data and diagnostics of various diseases. Ultrasound image segmentation, in particular echocardiographic image segmentation, is required to identify the regions of interest such as Left Ventricle (LV) and other cardiac cavities. Existing methods do not address the drawbacks of speed and quality of … …Journal of Computer Science, Vol. 7, Issue 5 · 7 May 2011 · 7,214 accessesView PDFCite
Research ArticleOpen accessIn the abstractManagerial Administration of Farming Machinery for Rice ProductionYosphatrachai Phuangpee, Pradtana YossuckProblem statement: This research was conducted due to an increase of agricultural machinery cost for rice production (46.00%) of farmers in Phichit province. Based on an analysis of cost reduction using the method of John Deere, it was found that this may decrease from 46.00-28.50% of the total cost. Thus, there was a question how to mange the agricultural machinery. … …Energy Research Journal, Vol. 1, Issue 2 · 31 Oct 2010 · 7,831 accessesView PDFCite
Research ArticleOpen accessIn the abstractThroughput-Delay Trade-Off for Slotted Aloha Multiple Access with Capture EffectA. Chehri, P. Fortier, P. M. TardifProblem statement: Medium Access Control (MAC) protocols are one of most important research issues in communication and networking. There have been proposed several MAC protocols in wireless as well in wired networks. Approach: ALOHA-based protocol is the simplest one, being able to provide prompt access, reliable channels and support for quality of service. However its limited capacity, low throughput and … …Journal of Computer Science, Vol. 5, Issue 9 · 30 Sep 2009 · 6,918 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Importance of Police Performance as a Determinant of Satisfaction with PoliceJames E. Larsen, John P. BlairProblem statement: Citizen satisfaction with police performance is an important concern of public managers because police performance is central to citizens and accounts for a large share of urban budgets. Also, there is substantial disagreement in the literature regarding determents of citizen satisfaction. Approach: Logistic regression was used to investigate the results of three public opinion surveys, conducted biannually, to … …American Journal of Economics and Business Administration, Vol. 1, Issue 1 · 31 Mar 2009 · 8,714 accessesView PDFCite
Research ArticleOpen accessIn the abstractImprovement on the Design of a Cabinet Grain DryerAdzimah K. Stephen, Seckley EmmanuelProblem statement: Grains are routinely seen dumped in villages and major cities during the peak of harvest. Therefore it is necessary that these grains are properly dried and stored to ensure availability and wholesomeness throughout the year. Advancements have taken place in the practice of drying since the first world war. Manufacturing methods have greatly improved production rate and the … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 1 · 31 Mar 2009 · 8,720 accessesView PDFCite
Research ArticleOpen accessIn the abstractA New Method for Optimal Harmonic Meter PlacementA. Ketabi, S.A. HosseiniIn this research, a new method based on Singular Value Decomposition (SVD) is proposed to solve the problem of optimal placement of meters for static estimation of harmonic sources in a power system. Also, the Binary Genetic Algorithm (BGA) is used to solve the problem of optimization. IEEE 14-bus test system is provided to validate the measurement placement algorithm. It … …American Journal of Applied Sciences, Vol. 5, Issue 11 · 30 Nov 2008 · 7,182 accessesView PDFCite
Research ArticleOpen accessIn the abstractLow-Noise High-Accuracy TOF Laser Range FinderShahram Mohammad Nejad, Saeed OlyaeeThis paper presents a new low-noise high-accuracy laser range finder based on the Time-Of-Flight (TOF) method. A Q-switched Nd:YAG laser at 1064 nm as a source and a SLIK avalanche photodiode as a detector are used. The optical section of the system including ZnS/MgF2 optical filter, designed by C++ and Zemax software, has been successfully implemented and tested. The quality … …American Journal of Applied Sciences, Vol. 5, Issue 7 · 31 Jul 2008 · 7,849 accessesView PDFCite