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156 results for “operations research”

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Research ArticleOpen accessIn the abstractA New Enhancement for Security Mechanism in RoutersKhalid Khanfar, Riyad Khanfar, Walid Al-Ahmad, Eyas El-QawasmehProblem statement: Routers are very important components in any network. They control and organize the in-bound traffic and the out-bound traffic. Controlling a router by an intruder leaves the entire network unsecured. In different studies, Router security was discussed from different aspects such as the routing protocol, the firewall. In this research, we present a new effective security mechanism for … …Journal of Computer Science, Vol. 4, Issue 7 · 31 Jul 2008 · 7,172 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Novel Database System Model Design for Tender Management SystemA. Noraziah, R. Norhayati, Ahmed N. Abdalla et al.This research focus on the software design and database system model for Tender Management System (TMS) in Kadastra. TMS in Kadastra is an automated system that can calculates tender payment claims for the land surveyor company. The calculation is based on the Vide Federal Government Gazette PU (A) 169 Thirteenth Schedule (Regulation 99) Scale of Fees for Title Surveys given … …Journal of Computer Science, Vol. 4, Issue 6 · 30 Jun 2008 · 6,592 accessesView PDFCite
Research ArticleOpen accessIn the abstractParallel Two-Dimensional Quicksort Algorithm (PTSA)Hamed Al Rjoub, Ahmad Odat, Abdullah AudatIn this research, a Parallel Two-Dimensional Sorting Algorithm (PTSA) is presented that has better performance than the classical Quicksort, to sort a data vector of size n = r (rows) × c(columns). PTSA algorithm divides the input vector into n/r sub-vectors, which represents tow-dimensional vector of Slave Processor Elements (VPE ), the maximum number of VPE for parallel sorting is … …Journal of Computer Science, Vol. 4, Issue 1 · 31 Jan 2008 · 6,859 accessesView PDFCite
Research ArticleOpen accessIn the abstractAutomatic Calibration of Frequency Compensation System in Computer-Controlled Patch-Clamp AmplifierJun Xiong, Gang Hu, Anlian QuComputer-controlled patch-clamp amplifier is a digitally controlled analog device used to record the cellular ion channel currents in electrophysiology research. The inherent bandwidth and performance of the headstage is limited by the stray capacitance and distributed capacitance across the feedback resistors. In order to effectively improve the performance of the headstage, the paper advanced a simplified automatic calibration method of … …Journal of Computer Science, Vol. 3, Issue 10 · 31 Oct 2007 · 6,814 accessesView PDFCite
Research ArticleOpen accessIn the abstractRemediation of Feedlot Nutrients Runoff by Electrocoagulation ProcessArjun Thapa, Shafiqur Rahman, Md. Saidul BorhanNutrient runoff from Concentrated Animal Feeding Operations (CAFOs) may cause ground and surface water pollution. Scientists and researchers are continually searching for appropriate technologies to mitigate feedlot nutrient runoff pollution. In this study, suitability of electrocoagulation treatment process was examined under laboratory conditions to mitigate nutrient pollutants from the feedlot runoff. Feedlot runoff was treated with three different type of … …American Journal of Environmental Sciences, Vol. 11, Issue 5 · 9 Nov 2015 · 7,080 accessesView PDFCite
Research ArticleOpen accessIn the abstractEfficient Design of a Photovoltaic Water Pumping and Treatment SystemAbderrahmen Ben Chaabene, Med Faouzi Elkaroui, Anis SellamiThrough the world, the exploitation of solar energies knew a strong growth these last years. It is interesting to exploit them on the place of consumption, by directly transforming into heat, or in electricity according to needs and especially in remote areas where power from utility is not available or is too costly to install. The use of photovoltaic sources … …American Journal of Engineering and Applied Sciences, Vol. 6, Issue 2 · 4 Jul 2013 · 7,628 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Model for Securing Sharing Information Across the Supply ChainMalihe Manzouri, Mohd Nizam Ab Rahman, Farshad Nasimi, Haslina ArshadSupply Chain Management (SCM) is impacted by information technology both directly or indirectly. Sharing information across the supply chain not only supports internal operations but also collaboration among supply partners. So, securing information has a critical role in creating confidence in organizations to share their data across the supply chain. Purpose of this study is to propose an appropriate model … …American Journal of Applied Sciences, Vol. 10, Issue 3 · 18 Mar 2013 · 6,714 accessesView PDFCite
Research ArticleOpen accessIn the abstractDevelopment of Wideband Planar Inverted-F Antennas for Wireless ApplicationSaida Ibnyaich, Abdelilah Ghammaz, Moha M’Rabet HassaniProblem statement: Due to the rapid development in wireless communication, the antennas capable of broad-band operations are very demanding in cellular communications systems. Among various possible antennas, planar inverted-F antennas (PIFAs) have the advantages of low profile and compact size and are very suitable for present-day wireless communication application. Approach: This study demonstrates a very effective method of bandwidth enhancement … …Journal of Computer Science, Vol. 7, Issue 8 · 14 Jul 2011 · 6,609 accessesView PDFCite
Research ArticleOpen accessIn the abstractParametric Deduction Optimization for Surface RoughnessTian-Syung LanProblem statement: Surface roughness is a major consideration in modern Computer Numerical Control (CNC) turning industry. Most existing optimization researches for CNC finish turning were either accomplished within certain manufacturing circumstances, or achieved through numerous equipment operations. Therefore, a general deduction optimization scheme is deemed to be necessary for the industry. Approach: In this study, four parameters (cutting depth, feed … …American Journal of Applied Sciences, Vol. 7, Issue 9 · 30 Sep 2010 · 7,440 accessesView PDFCite
Research ArticleOpen accessIn the abstractV-Band Fade Dynamics Characteristics Analysis in Tropical RegionKhairayu Badron, Ahmad Fadzil Ismail, Jafri Din, Ahmad Tharek Abdul RahmanProblem statement: Satellite operations at V-band in tropical and equatorial regions are constrained as a result of attenuation from rain. Approach: Statistics for 20 consecutive months of V-band terrestrial link signal attenuation measurements in Malaysia were presented in this analysis. Such information was considered very pertinent for Earth-space communication link design and can be used for initial groundwork plan for … …American Journal of Applied Sciences, Vol. 7, Issue 8 · 31 Aug 2010 · 7,802 accessesView PDFCite