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Research ArticleOpen accessEvery word in the titleCost Analysis of a System Involving Common-Cause Failures and Preventive MaintenanceM.Y. HaggagProblem statement: Many authors have studied the cost analysis of a two-unit cold standby redundant system with two types of unit failure, but no attention was paid to the reliability of a system involving common-cause failures and preventive maintenance. Question was raised whether the preventive maintenance would be effective on the reliability and performance of the system. Determine the efficacy … …Journal of Mathematics and Statistics, Vol. 5, Issue 4 · 31 Dec 2009 · 7,610 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleCost Analysis of A System with Preventive Maintenance by Using the Kolmogorov’s Forward Equations MethodKhaled Moh. El-SaidThis study deals with cost analysis of a two- unit cold standby redundant system with preventive maintenance.The random failure occurs at random times which follow an exponential distribution and also the repair time are assumed to be exponentially distributed. Using the Kolmogorov’s forward equations method. Several reliability characteristics are obtained. The mean time to system failure (MTSF) and the profit … …American Journal of Applied Sciences, Vol. 5, Issue 4 · 30 Apr 2008 · 7,067 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleCost Optimization of Composite I Beam Floor SystemUroš Klanšek, Stojan KravanjaThe paper presents the cost optimization of the composite I beam floor system. The composite I beam floor system is designed to be constructed up of a reinforced concrete slab and doubly-symmetrical welded steel I beams. The optimization was performed by the nonlinear programming approach, NLP. An accurate objective function of the manufacturing material, power and labour costs was developed … …American Journal of Applied Sciences, Vol. 5, Issue 1 · 31 Jan 2008 · 7,439 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleCreating and Developing a Service Network of Stage Costume Business in Isan CommunityOurarom Chantamala, Suphanni Luaboonchu, Terdchai PantachiProblem statement: A lot of stage costume businesses in Isan community (northeast community of Thailand) cannot expand their business into larger scales because the owners mange everything by themselves so it cause a lot of difficulties such as a lack of low cost stage costume sources. Approach: This research aimed to examine 3 points. First, to examine the background of … …Journal of Social Sciences, Vol. 5, Issue 4 · 31 Dec 2009 · 7,479 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleCost Analysis of Two-Dissimilar-Unit Cold Standby System with three States and Preventive Maintenance Using Linear First Order Differential EquationsM. Y. HaggagProblem statement: Several researchers have studied the reliability behavior of a three state systems, but no attention was paid to the reliability evaluation due to preventive maintenance. The better maintenance of the system originates better reliability. Also, standby support increases the reliability of the system. Approach: Determine the efficacy of preventive maintenance on the reliability and performance of the system. … …Journal of Mathematics and Statistics, Vol. 5, Issue 4 · 31 Dec 2009 · 6,881 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleRoad Transport Congestion Costs Calculations Adaptation to Engineering ApproachMarjan Lep, Beno MesarecThe article represents so called "engineering" approach for computing the total road transport congestion costs. According to economic welfare theory, the total costs of transport congestion are defined as dead weight loss (DWL) of infrastructure use. With a set of equations DWL could be formulated in a mathematical way. Because such form of equation is not directly applicable for concrete … …American Journal of Applied Sciences, Vol. 5, Issue 1 · 31 Jan 2008 · 6,817 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleOptimizing an E-Waste Reverse Supply Chain Model while Incorporating Risk CostsLinh Thi Truc Doan, Yousef Amer, Sang- Heon Lee, Phan Nguyen Ky PhucThe rapid growth of Electronic Waste (E-waste) in recent years has created serious influences on the environment and society. The highly potential solution to mitigate this issue is the Reverse Supply Chain (RSC) which can reuse and recover E-waste materials. Risks generally derive from a RSC operation such as collection, transportation and treatment risks, but most studies ignore risk effects … …American Journal of Engineering and Applied Sciences, Vol. 10, Issue 4 · 24 Nov 2017 · 7,981 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleThe Effects of Costus Root Aqueous Extract against Schistosomiasis, Liver Damage and Oxidants in Mouse Models of Schistosoma mansoni InfectionAreej Jameel M. AlghabbanSchistosomiasis is one of the major human parasitic diseases in many developing countries that causing chronic ill health in humans. The present work aimed to study the possible curative role of Costus (Saussurea lappa) root extract against Schistosoma mansoni infection induced liver toxicity, cytokines, oxidative stress and DNA damage in mice. 40 adult male micewere divided into four groups (G1, … …OnLine Journal of Biological Sciences, Vol. 21, Issue 2 · 15 Apr 2021 · 6,411 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleSTATUS OF THE ELDERLY HEALTHCARE COSTSFereshteh Farzianpour, Babak Farokhi, Saeid Shojaei et al.One of the most fundamental aspects of healthcare for the elderly is planning to reduce challenges associated with their healthcare costs. The present study aimed to assess the status of the elderly health care costs in North Khorasan Province in 2013. In this descriptive-analytical study, all elderly citizens in North Khorasan Province comprised the study population. Sample size was found … …American Journal of Agricultural and Biological Sciences, Vol. 9, Issue 2 · 29 Jan 2014 · 7,405 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleSolving the Periodic Maintenance Scheduling Problem via Genetic Algorithm to Balance Workforce Levels and Maintenance CostMohamed Ali Abdel-Fattah MansourProblem statement: In this article we address the multi-objective Periodic Maintenance Scheduling Problem (PMSP) of scheduling a set of cyclic maintenance operations for a given set of machines through a specified planning period to minimize the total variance of workforce levels measured in man-hours and maintenance costs with equal weights. Approach: The article proposed a mixed integer non-linear math programming … …American Journal of Engineering and Applied Sciences, Vol. 4, Issue 2 · 12 Jul 2011 · 8,322 accessesView PDFCite