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R. Senthilkumar,S. Vaidyanathan,B. Sivaraman 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.4
The orientation of the heat pipe plays the significant role in its performance. In specific orientations, the performance of the heat pipe is directly related to the wick structure. In conventional heat pipe, the working fluid is used a negative surface-tension gradient with temperature. It is an unfavorable one and it decreases the heat transport between the evaporator section and the condenser section. An Aqueous solution of n-Pentanol having a positive surface tension gradient with temperature is suggested as a working medium for heat pipe to improve the performance of capillary limit and operating stability. The objective of this paper is to perform a comparative study of heat pipe performance using the aqueous solution of n-Pentanol with water at various inclinations. The results are presented to demonstrate the merits and suitability of the aqueous solution of n-Pentanol as a working fluid for heat pipe.
Iskandar MUDA,R. Sivaraman,Sulieman Ibraheem Shelash Al-Hawary,Untung Rahardja,Rusul S. Bader,Deni Kadarsyah,Karrar Shareef Mohsen,Abdullah Hasan Jabbar,Purnima Chaudhary 대한산업공학회 2022 Industrial Engineeering & Management Systems Vol.21 No.3
In this research, the location of hubs in computer networks is investigated using the whale optimization algorithm. The problem of locating hubs in computer networks is an optimization problem and requires the definition of a suitable fit function. Therefore, the total data transfer time and the cost of creating hubs is used as a fit function. Capacitive hubs increase network availability because hubs have more response capacity than the number of node requests connected to the hubs. In hub location issues, the study seeks to connect the nodes to the nearest hub and create a computer network with the least cost of connecting the nodes to the hubs. The present study attempts to reduce disruptions in computer networks as a research innovation. Therefore, by using the whale optimization algorithm and solving the model with its help, the effective factors that affect computer network disruptions and examining the effect of each are identified. Given the results, the model’s reaction in terms of time and cost led to an increase in temporal and cost parameters.
Mushroom Supply Chain Network Design Using Robust Optimization Approach under Uncertainty
Sen Xie,Akbar Formonov,Abdulqader Abdulrahman Thapit,Mohammed Hayder Alshalal,Mostafa Kamel Shakir Obeis,R. Sivaraman,Abdullah Hasan Jabbar,Purnima Chaudhary,Yasser Fakri Mustafa 대한산업공학회 2022 Industrial Engineeering & Management Systems Vol.21 No.3
Nowadays, attention to sustainable food security and health and the incentive to increase revenue, has led many governments and policymakers to pay special attention to the effective performance of the agricultural supply chain. The positive effects of paying attention to agricultural supply chain management can be easily seen in job creation in urban and rural areas, easy access to the market for agricultural retailers and the appropriate relationship between small and medium businesses. This study examines the complete supply chain network of agricultural products (mushroom industry) in uncertain conditions. The model is presented in the form of two general objectives; the first objective refers to minimizing network costs, and the second objective to minimizing network environmental pollutants. Also, the proposed model is in uncertain conditions, and to overcome the uncertainty model, the optimization approach has been used. Finally, due to the multi-objective nature of the proposed model, the reinforced epsilon-constraint solution approach is used. Simulated data has been utilized to validate the proposed robust model. Given the results, the recycling rate of the consumed compost was above 0.4, demonstrating that applying a closed-loop supply chain network is logical, and establishing a recycling center could be economically justified.
Saurabh Singhal,Biju Theruvil Sayed,Feruza Kodirova,Heba Jassim Mohammed,Qasim Khlaif Kadhim,Zahraa Tariq Sahi,Untung Rahardja,R. Sivaraman,Yasser Fakri Mustafa 대한산업공학회 2022 Industrial Engineeering & Management Systems Vol.21 No.3
Today, due to the size of metropolitan areas and population growth, the issue of school services, as well as routing for each service, has become of particular importance This study seeks to provide a model for routing school services considering time dependence. In the suggested model for the current research, it is attempted to provide a model that can plan the problem of routing school services considering traffic constraints. Therefore, the route problem of time-dependent school service vehicles was considered in such a way that there is a school and potentially a number of stations were considered. In this study, to model the travel time, the linear fragment function with linear slope values greater than -1 was considered, which resulted in guaranteeing the non-transient property or the property of the first input of the first output in the modeling. After the research model was presented, the next step was to present the problem-solving algorithm. In this step, VNS algorithm was used to solve numerical problems in different dimensions. Then numerical problems were defined in small and large dimensions and problems in different dimensions were solved and the results indicate the ability of the model and algorithm to solve different problems.