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139 articles for “case control study”
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Research ArticleOpen accessIn the abstractClayboy Pottery Company: A Case Study in Quality Management in a Job Shop Operations SystemMichael R. SummersBackground: This case study is designed for upper-level undergraduate students in a basic operations management course. Prerequisites would include statistics and computer science. Objective: The purpose of the case is to give the students an opportunity to apply statistical quality control techniques. The case presents an interesting problem in a real setting and students will be forced to consider realistic … …American Journal of Economics and Business Administration, Vol. 2, Issue 1 · 31 Mar 2010 · 8,205 accessesView PDFCite
Research ArticleOpen accessIn the abstractPiecewise Sliding Mode Decoupling Fault Tolerant Control SystemRafi Youssef, Hui PengProblem statement: Proposed method in the present study could deal with fault tolerant control system by using the so called decentralized control theory with decoupling fashion sliding mode control, dealing with subsystems instead of whole system and to the knowledge of the author there is no known computational algorithm for decentralized case, Approach: In this study we present a decoupling … …American Journal of Applied Sciences, Vol. 7, Issue 1 · 31 Jan 2010 · 7,391 accessesView PDFCite
Research ArticleOpen accessIn the abstractOptimal Thyristor Control Series Capacitor Neuro-Controller for Damping OscillationsM. Magaji, M. W. MustafaThis study applies a neural-network-based optimal TCSC controller for damping oscillations. Optimal neural network controller is related to model-reference adaptive control, the network controller is developed based on the recursive "pseudo-linear regression". Problem statement: The optimal NN controller is designed to damp out the low frequency local and inter-area oscillations of the large power system. Approach: Two multilayer-perceptron neural networks … …Journal of Computer Science, Vol. 5, Issue 12 · 31 Dec 2009 · 7,283 accessesView PDFCite
Research ArticleOpen accessIn the abstractAn Eigenstructure Assignment for a Static Synchronous CompensatorAhmad N. Al-HusbanProblem statement: Power flow through an AC transmission line is influenced by three basic electrical parameters, which are line impedance, magnitudes and phase-shift angle between the sending and receiving voltages. Therefore, the change in any of the three basic parameters means a change in the power flow through the transmission line. The aims of this research paper are: increase the … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 4 · 31 Dec 2009 · 7,696 accessesView PDFCite
Research ArticleOpen accessIn the abstractLack of Association of Glutathione S-transferase Gene Polymorphisms in Iranian Prostate Cancer SubjectsB. Sahar Ansari, R. Vasudevan, M. Mirinargesi et al.Problem statement: Glutathione S-transferase is super family genes that encode enzymes which involve in the detoxification of the cell and protects DNA from damage. Conflicting results was found in several studies in association with GSTT1 and GSTM1 gene polymorphisms and prostate cancer. In this study, we determined the association between the GSTT1 and GSTM1 gene polymorphism and prostate cancer in … …American Journal of Biochemistry and Biotechnology, Vol. 5, Issue 1 · 31 Mar 2009 · 8,279 accessesView PDFCite
Research ArticleOpen accessIn the abstractRisk Factors for Bacteremia and Predictors of Mortality of Patients with Bloodstream Infection with Methicillin-Resistant Staphylococcus aureusElcio Bakowski, Sérgio Barsantini Wey, Eduardo Alexandrino Servolo MedeirosThe objective of this study was to evaluate the incidence of infection and the risk factors associated to bacteraemia and mortality due to Methicillin-Resistant Staphylococcus Aureus (MRSA). This cohort study, conducted from August 2004 through November 2005, involved 60 consecutively identified patients with bloodstream MRSA infection. The control group included 240 non-infected patients, randomly selected and hospitalized on the day, … …American Journal of Infectious Diseases, Vol. 4, Issue 4 · 31 Dec 2008 · 6,955 accessesView PDFCite
Research ArticleOpen accessIn the abstractComparison of Different Control Strategies in GA-Based Optimized UPFC Controller in Electric Power SystemsSeyed Abbas Taher, Reza Hematti, Majid NematiThis study presents a study of the application of a Unified Power Flow Controller (UPFC) to control power transmission, generator terminals voltage and better damping of Low Frequency Oscillation (LFO) in Single-Machine Infinite-Bus (SMIB) power system. The UPFC integrates properties of both shunt and series compensations and can effectively alter power system parameters in a way that increases power transfer … …American Journal of Engineering and Applied Sciences, Vol. 1, Issue 1 · 31 Mar 2008 · 7,606 accessesView PDFCite
Research ArticleOpen accessIn the abstractInduced Microcracking Affects Osteoblast Attachment on Hydroxyapatite Scaffolds for Tissue EngineeringIan O. Smith, Melissa J. Baumann, Eldon D. CaseBone microdamage caused by routine activity plays an important role in triggering targeted and nontargeted bone remodeling. Targeted remodeling occurs near localized areas of microdamage[1-4]. We hypothesize that bone remodeling may be directly and positively influenced by inducing microcracks in hydroxyapatite (HA) scaffolds for bone tissue engineering. A study by Case et al. showed microcracking in HA discs having >98% … …American Journal of Biochemistry and Biotechnology, Vol. 2, Issue 3 · 30 Sep 2006 · 6,560 accessesView PDFCite
Research ArticleOpen accessIn the abstractAssociation of Oral Contraceptives and Abnormal Pap SmearSayedmohsen Sayednozadi, Mohammadreza Hassany, Mohammad Arash RamezaniTo assess the hypothesis that combined Oral Contraceptive (OCs) increase the risk of cervical neoplasia, we conducted a multicenter Case-Control study in Mashhad, the capital of Khorasan province. Seventy-eight women with moderate to severe dysplasia at Pap smear as case group and one hundred fifty nine women with normal Pap smear were selected as the control group for evaluation. The … …American Journal of Applied Sciences, Vol. 2, Issue 7 · 31 Jul 2005 · 6,774 accessesView PDFCite
Research ArticleOpen accessIn the abstractDetection of Commercial Fraud in Processed Meat Products Using Rapid TechniquesAli M. Ahmed, Takwa H. Ismail, Reham R. Abouelmaatti et al.Meat adulteration with different species has become a considerable problem worldwide. It means that meat products contain undeclared meat species; so, the meat ingredients are not consistent with the label. It has direct impact on public health, religious faith, fair-trades and food safety standers. This study focused on species adulteration detection in meat products by applying accurate, slandered and fast … …American Journal of Biochemistry and Biotechnology, Vol. 16, Issue 2 · 4 Jun 2020 · 7,821 accessesView PDFCite