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Research ArticleOpen accessEvery word in the titleAn Investigation of Valve Lift Effect on Air Flow and Coefficient of Discharge of Four Stroke Engines Based on ExperimentAbdul Rahim Ismail, Rosli Abu Bakar, SeminThe coefficient of discharge (CD) is defined as the ratio of actual discharge to ideal discharge. In an engine environment, ideal discharge considers an ideal gas and the process to be free from friction, surface tension, etc. Coefficients of discharge are widely used to monitor the flow efficiency through various engine components and are quite useful in improving the performance … …American Journal of Applied Sciences, Vol. 5, Issue 8 · 31 Aug 2008 · 7,431 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleSimulation of Convective Heat-Transfer Coefficient in a Buried ExchangerTaoufik Mnasri, Rached Ben Younès, Maher Raddaoui, Salem ElouraginiThis study presents analytical models allowing to study a forced convection laminar flow in non-established dynamic and thermic regimes. We treated a flow in a bitubular exchanger in permanent thermal contact with a semi-infinite medium, such as the ground. The wall temperature as well as the wall heat flux evolve in the course of time until a quasi-steady mode. The … …American Journal of Applied Sciences, Vol. 5, Issue 8 · 31 Aug 2008 · 6,901 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffect of Gamma Irradiation on the Structure Diffusion Coefficient of Co-Zn Doped FerriteDalal Mohammed HemedaA series of the ferrite system Co0.6Zn0.4MnxFe2-xO4 with (x = 0.7, 0.8, 0.9 and 1) were prepared by general ceramic method. The X-ray diffraction patterns confirmed the formation of the cubic single phase structure. The lattice parameter and the crystal size increased after irradiation which was attributed to the formation of ferrous ions of larger radius than that of ferrous … …American Journal of Applied Sciences, Vol. 2, Issue 5 · 31 May 2005 · 6,728 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleDesign Based on Intra-Class Correlation CoefficientsRobert Lew, Gheorghe DorosProblem statement: Reliability studies are concerned with the study of "consistency" or "repeatability" of measurements. Often times (but not always) the reliability coefficients are Intra-class Correlation Coefficients (ICC). Depending on the design or the conceptual intent of the study there are three types of intra-class correlation coefficients, termed intra-class correlation coefficients Case 1, 2 and 3, for measuring the reliability … …Current Research in Biostatistics, Vol. 1, Issue 1 · 30 Jun 2010 · 18,541 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleAn Efficient Approach for Computing Silhouette CoefficientsMoh'd B. Al- Zoubi, Mohammad al RawiOne popular approach for finding the best number of clusters (K) in a data set is through computing the silhouette coefficients. The silhouette coefficients for different values of K, are first found and then the maximum value of these coefficients is chosen. However, computing the silhouette coefficient for different Ks is a very time consuming process. This is due to … …Journal of Computer Science, Vol. 4, Issue 3 · 31 Mar 2008 · 8,067 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleAnalysis of Diffusion Coefficient using Reversed-Flow Gas Chromatography-A ReviewKhalisanni Khalid, Rashid Atta Khan, Sharifuddin Mohd. ZainProblem statement: Since the earliest publication on the technique, Reversed-Flow Gas Chromatography (RF-GC) has been used to determine physicochemical properties by measuring the value of one in the presence of another. The method is precise, accurate and simple compared to other conventional techniques. Approach: The experimental setup consists of a small modification of a commercial gas chromatograph, so that it … …American Journal of Applied Sciences, Vol. 8, Issue 5 · 17 May 2011 · 7,223 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleThe Temperature Dependence Coefficients of Amorphous Silicon and Crystalline Photovoltaic Modules Using Malaysian Field Test InvestigationSulaiman Shaari, Kamaruzzaman Sopian, Nowshad Amin, Mohd Nizan KassimThe temperature dependence coefficients of amorphous silicon and crystalline photovoltaic (PV) modules using Malaysian field data have been obtained using linear regression technique. This is achieved by studying three test stand-alone PV-battery systems using 62 Wp a-Si, 225 Wp multi-crystalline and 225 Wp mono-crystalline PV modules. These systems were designed to provide electricity for rural domestic loads at 200 W, … …American Journal of Applied Sciences, Vol. 6, Issue 4 · 30 Apr 2009 · 7,281 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEfficacy of Feeding Earthworm Meal-Based Diet on Feed Intake, Weight Gain, and Apparent Digestibility Coefficient of Red Sokoto GoatMoshood Adewale Belewu et al.Feed which contributes about 70-80% of the cost of feeding is one of the major problems of livestock production. Feeding nutritious feed to animals is vital for the vigor and wellbeing of livestock and human being and the nutrient it contains assist animal to grow, develop and reproduce. Hence, this study examined the impact of Earthworm Meal (EWM)-based diets on … …OnLine Journal of Biological Sciences, Vol. 25, Issue 2 · 22 Mar 2025 · 4,498 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleImpact of the Drainage Slope Experimental Study on the Manning Roughness CoefficientKaveh Ostad-Ali-Askari, Hossein Gholami, Shahide Dehghan, Morteza SoltaniIt was Determined the current persistence components were significant in hydraulic designs of highland zone with sharp slopes. It was defined to examine the consequence of gradient, rapidity, depth and dimension of coarseness on the manning coarseness factor in this superficial river area. This is an investigational education about manning coarseness defined for highland zones protected by elements in three … …American Journal of Engineering and Applied Sciences, Vol. 14, Issue 1 · 15 Jan 2021 · 6,712 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleFractional Calculus for Certain Integral Operator Involving Logarithmic CoefficientsAabed Mohammed, Maslina Darus, Daniel BreazProblem statement: Some properties of certain integral operators on some subclasses were studied. Approach: Certain classes defined by integral operators were introduced. The well known definitions and preliminaries results were stated. Results: Having new integral operator, the characterization problems were discussed. Thus sufficient conditions were given. Conclusion: Therefore, by having new integral operators, sufficient conditions were determined. In fact, other … …Journal of Mathematics and Statistics, Vol. 5, Issue 2 · 30 Sep 2009 · 7,181 accessesView PDFCite