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230 articles for “velocity”
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Research ArticleOpen accessIn the abstractFocusing of the Flow Capture for Local Exhaust Ventilation SystemsS. Y. Spotar, A. L. SorokinProblem statement: The extraction hoods commonly used as inlet element of the local ventilation systems exhibit limited emission capture over moderate distances from the source of the hazardous emissions. Proposed inclusion of a swirling peripheral jet was found to increase the effective length over which the extraction hood successfully captures harmful fumes. However information on a detailed pattern field of … …American Journal of Applied Sciences, Vol. 7, Issue 6 · 30 Jun 2010 · 7,333 accessesView PDFCite
Research ArticleOpen accessIn the abstractMichelson-Morley Experiment another AssessmentKoorosh ShahdaeiProblem statement: Ehrenfest paradox may be the most basic phenomenon in relativity that has a long history marked by controversy, which still gets different interpretations by researches. This assessment is about another paradox in special relativity for observers in none inertial frame that perceiving Galilean transformation. Approach: This assessment reevaluates Michelson and Morley's famous experiment and Lorentz transformation by comparing … …Physics International, Vol. 1, Issue 1 · 31 Mar 2010 · 8,011 accessesView PDFCite
Research ArticleOpen accessIn the abstractPosition and Obstacle Avoidance Algorithm in Robot SoccerAwang Hendrianto Pratomo, Anton Satria Prabuwono, Mohd Shanudin Zakaria et al.Problem statement: Robot soccer is an attractive domain for researchers and students working in the field of autonomous robots. However developing (coding, testing and debugging) robots for such domain is a rather complex task. Approach: This study concentrated on developing position and obstacle avoidance algorithm in robot soccer. This part is responsible for realizing soccer skills such as movement, shoot … …Journal of Computer Science, Vol. 6, Issue 2 · 28 Feb 2010 · 11,828 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 abstractOxidation of Exogenous Lactate by Lactate Dehydrogenase C in the Midpiece of Rat Epididymal Sperm is Essential for Motility and Oxidative ActivityHideaki Yamashiro, Masaaki Toyomizu, Akane Kadowaki et al.Problem statement: To identify the metabolic reaction-glycolysis or oxidative phosphorylation that is mainly involved in the production of energy required for rat sperm mobilization. Approach: Epididymal sperm were collected from Wistar rats and extended in lactate-containing or lactate-free raffinose-modified Krebs-Ringer Bicarbonate solution (mKRB)-egg yolk medium supplemented with 0, 1, 2, or 3 mM 2-Deoxy-D-Glucose (2 DG) and 1, 2, or … …American Journal of Applied Sciences, Vol. 6, Issue 10 · 31 Oct 2009 · 6,906 accessesView PDFCite
Research ArticleOpen accessIn the abstractAnalysis of the Tunnel Boring Machine Advancement on the Bologna-Florence Railway LinkM. Cardu, P. Oreste, T. CicalaProblem statement: The high-velocity railway link between Bologna and Firenze (Italy) is today under construction and several tunnels have to be excavated for this purpose, some of these using TBMs. A small diameter tunnel, named Cunicolo ginori, was realized by TBM parallel to a large railway tunnel (Vaglia), at the distance of only 35 m. Approach: The Vaglia tunnel had … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 2 · 30 Sep 2009 · 7,969 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluation of Liquefaction Return Period for Bangalore Based on Standard Penetration Test Data: Performance Based ApproachK. S. Vipin, T. G. SitharamProblem statement: The conventional liquefaction evaluation is based on a deterministic approach. However in this method the uncertainty in the earthquake loading is not properly taken into account. However recent research in this field indicates that this uncertainty in the earthquake loading has to be considered in the liquefaction potential evaluation. Moreover the evaluation of liquefaction return period is not … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 3 · 30 Sep 2009 · 7,744 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of the 2004 'Boxing Day' Tsunami on Water Properties and Currents in the Bay of BengalNaveendra Reddy, Than Aung, Awnesh SinghProblem statement: Variation of temperature, salinity and geostrophic current in the Bay of Bengal due to the 2004 Boxing Day tsunami was investigated in this project using ARGO float and absolute dynamic height topography data. This was done to determine the effect of the tsunami on the water properties in the bay. Approach: The study area was between latitudes 5º … …American Journal of Environmental Sciences, Vol. 5, Issue 3 · 30 Jun 2009 · 7,389 accessesView PDFCite
Research ArticleOpen accessIn the abstractIdentification of Flutter Derivatives of Bridge Decks in Wind Tunnel Test by Stochastic Subspace IdentificationT. Janesupasaeree, V. BoonyapinyoProblem statement: Flutter derivatives are the essential parameters in the estimations of the flutter critical wind velocity and the responses of long-span cable supported bridges. These derivatives can be experimentally estimated from wind tunnel test results. Generally, wind tunnel test methods can be divided into free decay test and buffeting test. Compared with the free decay method, the buffeting test … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 2 · 30 Jun 2009 · 8,140 accessesView PDFCite
Research ArticleOpen accessIn the abstractImproving Reliability and Productivity of an Aluminum Extruder by Implementation of Direct Torque Control TechnologyMazouz A. SalahatProblem statement: The linear motor drive is widely used in driving an extrusion puller in an aluminum extrusion industry. The main disadvantage of this drive is manual and step-wise torque control. This research was done to replace the linear motor drive by AC drive with direct torque control technology. Approach: Mathematical calculations were carried to select an AC drive which … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 2 · 30 Jun 2009 · 7,271 accessesView PDFCite