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234 results for “analytical study”
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Research ArticleOpen accessIn the abstractParticle Swarm Optimization Approach for Optimal Design of Switched Reluctance MachineMahadevan Balaji, Vijayarajan KamarajProblem statement: Switched Reluctance Motors (SRMs) are widely used in various applications due to their inherent simplicity and rugged construction In SRM, torque output and torque ripple are sensitive to stator and rotor pole arcs and their selection is a vital part of SRM design process. In this study Particle Swarm Optimization technique is proposed for determining optimum pole arc … …American Journal of Applied Sciences, Vol. 8, Issue 4 · 18 Apr 2011 · 7,332 accessesView PDFCite
Research ArticleOpen accessIn the abstractFlexural Behaviors of Damaged Full-Scale Highway Bridge Girder Strengthened by External Post TensionSayan Sirimontree, Jaruek TeerawongProblem statement: Prestressed Concrete (PC) I section girder with Reinforced Concrete (RC) topping slab has been widely applied to long span bridge girders for several years. A bridge girder is subjected to severe conditions caused by an aggressive environment and overloading. A crack can be initiated and propagate when the tensile stress exceeds the tensile strength of concrete due to … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 4 · 5 Nov 2010 · 8,675 accessesView PDFCite
Research ArticleOpen accessIn the abstractRate Effect on Pullout Behavior of Steel Fibers Embedded in Very-High Strength ConcreteTaher Abu-Lebdeh, Sameer Hamoush, Brian ZornigProblem statement: Rate dependence of the newly developed Very-High-Strength-Concrete (VHSC) composites has received little or no attention so far. Approach: In this research, the bond-slip mechanisms of four types of steel fibers embedded in VHSC matrices were investigated through single-fiber pullout tests with the loading rates and matrix strengths are the primary variables. This study presented the experimental results of … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 2 · 30 Jun 2010 · 8,448 accessesView PDFCite
Research ArticleOpen accessIn the abstractFinite Element Modeling of Transient Temperatures in a Small-Caliber ProjectileM. Brian Thomas, Leon DozierProblem statement: Future generations of intelligent munitions will use Microelectromechanical Systems (MEMS) for guidance, fuzing logic and assessment of the battlefield environment. The temperatures fund in a gun system, however, are sufficient to damage some materials used in the fabrication of MEMS. The motivation of this study is to model the dynamic temperature distribution in a typical small-caliber projectile. Approach: … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 2 · 30 Jun 2010 · 8,053 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffects of Total Ionizing Dose on Bipolar Junction TransistorChee Fuei Pien, Haider F. Abdul Amir, Saafie Salleh, Azali MuhammadProblem statement: The amount of ionizing radiation that Bipolar Junction Transistor (BJT) devices encounter during their lifecycle degrades both of their functional and electrical parameter performances. The different radiation environments either in space, high energy physics experiments, nuclear environment or fabrication process as well as for standard terrestrial operation possess an impact on the devices. Approach: In this research, analytical … …American Journal of Applied Sciences, Vol. 7, Issue 6 · 30 Jun 2010 · 8,316 accessesView PDFCite
Research ArticleOpen accessIn the abstractTwo Optimization Methods to Determine the Rate Constants of a Complex Chemical Reaction Using FORTRAN and MATLABAbdel-Latif Aboul Seoud, Lamiaa A.M. AbdallahProblem statement: For chemical reactions, the determination of the rate constants is both very difficult and a time consuming process. The aim of this research was to develop computer programs for determining the rate constants for the general form of any complex reaction at a certain temperature. The development of such program can be very helpful in the control of … …American Journal of Applied Sciences, Vol. 7, Issue 4 · 30 Apr 2010 · 8,050 accessesView PDFCite
Research ArticleOpen accessIn the abstractAutomated Position System Implementation over Vehicular Ad Hoc Networks in 2-Dimension SpaceSoumen Kanrar, Mohammad SirajProblem statement: The real world scenario have changed from the wired connection to wireless connection. Over the years software development has responded to the increasing growth of wireless connectivity in developing network enabled software. The problem arises in the wireless domain due to random packet loss in transport layer and as well as in data link layer for the end … …Journal of Computer Science, Vol. 6, Issue 2 · 28 Feb 2010 · 7,196 accessesView PDFCite
Research ArticleOpen accessIn the abstractMonitoring the Impact of Urban Physical Development Plans On Old Sites of CitiesAbolfazl Meshkini, Kyoumars Habibi, Hoshmand Alizade, Sina Razzaghi AslProblem statement: The interventional plans are one of the most influential policies which affected the socio-economic and physical fabric of the old parts of the Iranian cities. While the foundation of old areas of many cities are based on the socio-historical values which has unique compatibility with the cultural background, the new urban development plans notably comprehensive and detailed, have … …American Journal of Environmental Sciences, Vol. 6, Issue 1 · 28 Feb 2010 · 7,321 accessesView PDFCite
Research ArticleOpen accessIn the abstractRobust of Doppler Centroid for Mapping Sea Surface Current by Using Radar Satellite DataMazlan Hashim, Maged MarghanyProblem statement: Sea surface current retrieving from Synthetic Aperture Radar (SAR) is required standard methods due to the complexity of sea surface ocean imaging in SAR data. In this context, various analytical models have been developed which describe overall effects of sea surface roughness on the Doppler signal mechanisms. Nevertheless, such models are limited in the complexity of the sea … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 4 · 31 Dec 2009 · 7,421 accessesView PDFCite
Research ArticleOpen accessIn the abstractProduction of Potassium and Calcium Hydroxide, Compost and Humic Acid from Sago (Metroxylon sagu) WasteC. P. Auldry, O. H. Ahmed, A.M. Nik Muhamad et al.Problem statement: Agriculture waste such as Sago Waste (SW) has a potential to cause pollution when the waste is discarded into rivers. In order to add value to SW, a study was conducted to produce potassium and calcium hydroxide, compost and Humic Acid (HA) from SW. Approach: The SW was air-dried and some grinded. The grinded SW was incinerated at … …American Journal of Environmental Sciences, Vol. 5, Issue 5 · 31 Oct 2009 · 7,588 accessesView PDFCite