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234 results for “analytical study”
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Research ArticleOpen accessIn the abstractTHROUGHPUT ANALYSIS OF AGGREGATION WITH FRAGMENT RETRANSMISSION PLUS QUALITY OF SERVICE SCHEMETeuku Yuliar Arif, Riri Fitri SariAggregation with Fragment Retransmission (AFR) is a scheme designed for frame transmission to increase efficiency at the MAC layer throughput. AFR provides a higher throughput compare to Distributed Coordination Function (DCF) scheme. However AFR scheme did not has QoS service function when compared to DCF scheme. DCF scheme already has contention-based QoS service using Enhanced Distributed Coordination Function (EDCA) scheme. … …Journal of Computer Science, Vol. 9, Issue 10 · 5 Sep 2013 · 7,321 accessesView PDFCite
Research ArticleOpen accessIn the abstractSafety Criterion in Inter-Domain Routing Protocol with Pseudo RenewalsBhavneet Kaur, Karanjeet Singh Kahlon, Sandeep SharmaPast analytical analyses does not fully include safety of BGP and its convergence to stable routing in terms of various operational features of BGP such as route flap damping, MRAI timers. Present proposal shows that these features can cause router to send pseudo advertisement of less preferred path. In this study it is made evident that in simple network scenario … …Journal of Computer Science, Vol. 9, Issue 5 · 27 May 2013 · 6,695 accessesView PDFCite
Research ArticleOpen accessIn the abstractLunisolar Invariant Relative OrbitsWalid Ali RahomaThe present study deal with constructing an analytical model within Hamiltonian formulation to design invariant relative orbits due to the perturbation of J2 and the lunisolar attraction. To fade the secular drift separation over the time between two neighboring orbits, two second order conditions that guarantee that drift are derived and enforced to be equal. …American Journal of Applied Sciences, Vol. 10, Issue 4 · 2 Apr 2013 · 6,272 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluation of Food Color Consumption and Determining Color Type by Thin Layer ChromatographyShayan Hosseini, Mehraban Sadeghi, Bahman Banaei Ghahferkhi et al.The aim of this research was to investigate the role of the social demographic parameters of the people in charge of the facilities producing pastry, poolak (a type of coin-shaped candy) and rock candy in the consumption of food colors and to determine color type by thin layer chromatography in Shahr-e-kord city in 2011. This research was an interventional-analytical study … …American Journal of Applied Sciences, Vol. 10, Issue 2 · 17 Feb 2013 · 7,229 accessesView PDFCite
Research ArticleOpen accessIn the abstractInternal Evaluation of the Department of Environmental Health Science and EngineeringFereshteh Farzianpour, Shayan Hosseini, Abdolmehdi Mirsepasi et al.Internal evaluation is a process in which it is possible to evaluate an educational program using standards based on pre-defined objectives and certain educational quality. The aim was to evaluate educational program of Environmental Health Science and Engineering students in the Environmental Health department and investigate if it is adjusted for students needs. The study was cross-sectional, descriptive and analytical … …American Journal of Applied Sciences, Vol. 10, Issue 1 · 12 Jan 2013 · 7,465 accessesView PDFCite
Research ArticleOpen accessIn the abstractAntioxidant Potential in Lipophilic and Hydrophilic Extracts from Medicinal Herbs (Salvia officinalis and Echinacea angustifolia). A Comparison Between Assays Based on Electron Paramagnetic Resonance and SpectrophotometryFlavia Navari-Izzo, Riccardo Izzo, Mike F. Quartacci et al.Recently, detection of antioxidant activity of plant extracts has caught the attention of researchers. Determination of antioxidant activity is usually performed using stable free radicals. A number of assays is available for screening the antioxidant activity of food constituents, but few of these methods are applicable to lipophilic substances. EPR is the analytical technique that directly measures free radicals making … …American Journal of Agricultural and Biological Sciences, Vol. 7, Issue 4 · 6 Nov 2012 · 9,013 accessesView PDFCite
Research ArticleOpen accessIn the abstractTotal Petroleum Hydrocarbons By Gas Chromatography in Colombian Waters and SoilsC.. González, S. Roa, A. Suspes et al.Total Petroleum Hydrocarbons (TPHs) were required by the Colombian Environmental Authorities. However, the great diversity of hydrocarbon sources, in addition to the variety of available techniques and analytical methods had created confusion among the users of the data in regards to the appropriate methodologies. This study presents the results obtained in the method validation for the determination of TPHs in … …American Journal of Environmental Sciences, Vol. 8, Issue 4 · 20 Jun 2012 · 9,218 accessesView PDFCite
Research ArticleOpen accessIn the abstractA General Formula for Ion Concentration-Dependent Electrical Conductivities in Polymer ElectrolytesMahardika Prasetya Aji, Masturi, Satria Bijaksana et al.Problem statement: The aim of this study is to develop a model for describing the effect of ion concentration on the electrical conductivity of polymer electrolytes by considering two mechanisms simultaneously: Enhancements of ion concentration and amorphous phase. Approach: The problems based on new observations in polymer electrolyte when ion concentration in the polymer electrolytes was increased, both the fraction … …American Journal of Applied Sciences, Vol. 9, Issue 6 · 30 Mar 2012 · 8,619 accessesView PDFCite
Research ArticleOpen accessIn the abstractCalibration Coefficients for Residual Stress Measurement in Composite Materials Using Finite Element MethodA. G. Ghasemi, M. AkbarzadehProblem statement: Since the residual stresses can cause a scienificant reduction in strength of the mechanical components, having a semi-destructive measuring method that would predict and model theses stresses would be an advantage. The hole drilling method has been used, by many researches, for measurement of the residual stresses in different materials. In this article, the finite element method is … …American Journal of Engineering and Applied Sciences, Vol. 5, Issue 1 · 18 Feb 2012 · 9,022 accessesView PDFCite
Research ArticleOpen accessIn the abstractRed Palm Weevil (Rynchophorus Ferrugineous, Olivier) Recognition by Image Processing TechniquesSaleh Mufleh Al-Saqer, Ghulam Mubashar HassanProblem statement: Red palm weevil is the most destructive insect for palm trees all over the world. This research is part of developing an automated wireless red palm weevil detection and control system. The focus for this study was to develop red palm Weevil recognition system which can detect RPW in an image and can be used in wireless image … …American Journal of Agricultural and Biological Sciences, Vol. 6, Issue 3 · 4 Aug 2011 · 9,103 accessesView PDFCite