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66 articles for “Coefficient of Variation”
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Research ArticleOpen accessIn the abstractGENETIC DIVERSITY OF OKRA (ABELMOSCHUS ESCULENTUS L.) GENOTYPES FROM DIFFERENT AGRO-ECOLOGICAL REGIONS REVEALED BY AMPLIFIED FRAGMENT LENGTH POLYMORPHISM ANALYSISNaser M. SalamehThis study was carried out to assess the genetic diversity in 48 genotypes and accessions using eight Amplified Fragment Length Polymorphism (AFLP) primer-pairs. The eight selected AFLP primer-pairs generated a total of 150 polymorphic loci. Using the generated AFLP data, the Un-Weighted Pair Group Method with Arithmetic Average (UPGMA) ordered the genotypes into six groups based on Dice similarity coefficient. … …American Journal of Applied Sciences, Vol. 11, Issue 7 · 29 Apr 2014 · 8,069 accessesView PDFCite
Research ArticleOpen accessIn the abstractADAPTIVE CLUSTER SAMPLING USING AUXILIARY VARIABLENipaporn ChutimanIn this study we study the estimators of the population mean in adaptive cluster sampling by using the information of the auxiliary variable. The estimators in this study are the classical ratio estimator, the ratio estimator using the population coefficient of variation and the coefficient of kurtosis of the auxiliary variable, the regression estimator and the difference estimator. Simulations showed … …Journal of Mathematics and Statistics, Vol. 9, Issue 3 · 4 Sep 2013 · 9,894 accessesView PDFCite
Research ArticleOpen accessIn the abstractPrediction of Days After Anthesis of Developing Tomato (Solanum lycopersicum) Fruit from Blossom-End Changes in ColorTiznado-Hernández Martín Ernesto, Delia Moreno-Velázquez, Angel Javier Ojeda-Contreras, Andrés Ochoa-MezaThe development of mathematical models to predict the physiological status of a developing fruit can be a useful tool to reduce the variation in fruit response to postharvest treatments. The objective of this study was to develop a mathematical model to predict Days After Anthesis (DAA) in tomato fruit from changes in the blossom end color. Around 160 tomato flowers … …American Journal of Agricultural and Biological Sciences, Vol. 8, Issue 3 · 4 Sep 2013 · 8,105 accessesView PDFCite
Research ArticleOpen accessIn the abstractAssessment of Soil Compaction under Center Pivot Irrigation Systems and its Effect on Crop PerformanceKhalid Ali Al-GaadiA field study on two 12.5 ha plots cultivated with wheat and alfalfa was conducted to determine Soil Compaction (SC), its spatial variability and its effect on crop performance under center pivot irrigation systems. Considering compaction at two tested soil depths, results revealed that the soil of the alfalfa plot exhibited significantly (p<0.01 and p<0.05 for 0 to 10 cm … …American Journal of Agricultural and Biological Sciences, Vol. 8, Issue 1 · 12 Mar 2013 · 7,715 accessesView PDFCite
Research ArticleOpen accessIn the abstractCylinder Pressure Variations of the Fumigated Hydrogen-Diesel Dual Fuel CombustionBoonthum Wongchai, Porranat Visuwan, Sathaporn ChuepengCylinder pressure is one of the main parameters of diesel engine combustion affecting several changes in exhaust gas emission composition and amount as well as engine useful power, specifically when alternative fuels are used. One among other alternative fuels for diesel engine is hydrogen that can be used as fumigated reagent with air prior to intake to engine in order … …American Journal of Applied Sciences, Vol. 9, Issue 12 · 12 Dec 2012 · 7,443 accessesView PDFCite
Research ArticleOpen accessIn the abstractValidation of the Ceres-Wheat for Prediction of Wheat Varieties in Irrigation and Terminal Drought StressFarzad Paknejad, Fatemeh Majidi Fakhr, Seied Mehdi MirtaheriProblem statement: Crop growth models have many potential uses for crop managements. Approach: In order to evaluation of CERES-Wheat model on five varieties of winter wheat in Karaj weather condition in Full Irrigation (FI) and Stop Irrigation (SI) after flowering until final growth stage an experiment conducted in shape of split plot in based on randomize complete block design with … …American Journal of Agricultural and Biological Sciences, Vol. 7, Issue 2 · 16 Mar 2012 · 7,723 accessesView PDFCite
Research ArticleOpen accessIn the abstractSimulation of Wheat Cultivar Response to Irrigation Treatments using of CERES-Wheat ModelFatemeh Majidi Fakhr, Farzad Paknejad, Mohammad Nabi Ilkaee et al.Problem statement: Crop models are used as tools for enhancing agricultural research through the identification of gaps in knowledge as well as by providing support for decision making in agricultural planning. Approach: In order to evaluation of CERES-Wheat model on five cultivars of winter wheat under Karaj weather condition in Full Irrigation (FI) and Terminal Irrigation at Flowering (TIF) an … …American Journal of Agricultural and Biological Sciences, Vol. 7, Issue 2 · 14 Mar 2012 · 7,956 accessesView PDFCite
Research ArticleOpen accessIn the abstractStudy on Optical Constants and Refractive Index Dispersion of Neutral red Doped Polymer FilmHussain A. BadranProblem statement: The some optical constants polymer thin film with red dye 3-amino-7-dimethylamino-2-methyl phenazine (NR) as the guest material and Polyvinylpyrrolidone (PVP) as the host material were prepared by adulteration and spin-coating methods. Approach: The values of some important parameters (refractive index n, extinction coefficient K and dielectric constant ε∞) of polymer thin film are determined from these spectra. Results: … …American Journal of Applied Sciences, Vol. 9, Issue 2 · 26 Dec 2011 · 8,919 accessesView PDFCite
Research ArticleOpen accessIn the abstractSeasonal Variation of Soil Resistivity and Soil Temperature in Bayelsa StateJohn Tarilanyo Afa, C. M. AnaeleProblem statement: Due to the climatic variation for the year and it's sever harmattan during the month of December to March with the high keraunic level (80-90) in the areas, it was necessary to know the seasonal variation of soil resistivity. The seasonal variation and the nature of soil have considerable influence on electrical characteristics and therefore affect the earthling … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 4 · 5 Nov 2010 · 8,724 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Thermo-Economics Analysis of the Optimum Thickness of Double-Layer Insulation for Air Conditioning DuctN. Soponpongpipat, P. Jaruyanon, S. NanetoeProblem statement: Engineering economics played an important role in engineering design works. The net saving value was the easiest criterion to indicate the optimum design. However, the information about the net saving analysis of double-layer insulation of air conditioning duct was insufficient. Thus, it was important to study this case. Approach: The optimum thickness analysis of air conditioning duct’s insulation, … …Energy Research Journal, Vol. 1, Issue 2 · 31 Oct 2010 · 7,722 accessesView PDFCite