scholarly journals A Repair-Time Limit Replacement Model with Imperfect Repair

2013 ◽  
Vol 39 (4) ◽  
pp. 233-238 ◽  
Author(s):  
Il Han Chung ◽  
Won Young Yun
Keyword(s):  
Repair Time ◽  
Time Limit ◽  
Imperfect Repair ◽  
Replacement Model

scholarly journals The optimal repair-time limit replacement policy with imperfect repair: Lorenz transform approach

2003 ◽  
Vol 38 (11-13) ◽  
pp. 1169-1176 ◽  
Author(s):  
Tadashi Dohi ◽  
Akira Ashioka ◽  
Naoto Kaio ◽  
Shunji Osaki
Keyword(s):  
Repair Time ◽  
Time Limit ◽  
Replacement Policy ◽  
Imperfect Repair

scholarly journals System Maintenance Using Several Imperfect Repairs Before a Perfect Repair

2021 ◽  
Vol 9 (1) ◽  
pp. 176-188
Author(s):  
Haixia Smithson ◽  
Jyotirmoy Sarkar
Keyword(s):  
Optimal Number ◽  
Repair Time ◽  
Repair Cost ◽  
Efficient System ◽  
Imperfect Repair ◽  
Optimal Probability ◽  
System Maintenance ◽  
Imperfect Repairs

Allowing several imperfect repairs before a perfect repair can lead to a highly reliable and efficient system by reducing repair time and repair cost. Assuming exponential lifetime and exponential repair time, we determine the optimal probability $p$ of choosing a perfect repair over an imperfect repair after each failure. Based on either the limiting availability or the limiting average repair cost per unit time, we determine the optimal number of imperfect repairs before conducting a perfect repair.

Cost evaluation for an imperfect-repair model with random repair time

2005 ◽  
Vol 36 (11) ◽  
pp. 717-726 ◽  
Author(s):  
Jae-Hak Lim ◽  
Dae-Kyung Kim ◽  
Dong Ho Park *
Keyword(s):  
Repair Time ◽  
Cost Evaluation ◽  
Imperfect Repair

Generation and analysis of biogas from kitchen waste at a small scale

2020 ◽  
pp. 140-148
Author(s):  
Md. Kumail Naqvi ◽  
Mrinal Anthwal ◽  
Ravindra Kumar
Keyword(s):  
Food Waste ◽  
Total Solid ◽  
Small Scale ◽  
Cow Dung ◽  
Retention Period ◽  
Household Level ◽  
Replacement Model ◽  
The Everyday ◽  
Scale Experiment ◽  
Small Period

Biogas is the product of anaerobic vitiation of biodegradable matter. This paper focuses on the need of alternative and green sources of energy at a household level and how biogas produced from the everyday organic waste has the potential and possibility to replace LPG cylinders at houses, shops etc. and empower us to step towards an eco-friendly future. The purpose this small-scale experiment has been to find the perfect input matter that is easy to acquire and which produces the maximum amount of gas from minimum input and within small period of waste retention. Four different types of input waste material containing different quantities of cow dung and kitchen food waste were studied through individual experimental setups. Waste was mixed and kept at room temperature and the pH and total solid concentration of the samples were recorded on regular intervals. From the experiment it was found that the optimum yield of biogas at a small scale, based on the parameters such as retention period, pH and total solid con-centration can be obtained by the use of food waste form households and kitchens. The exact composition has been discussed in this paper. The energy generated by the small-scale generator has also been compared to that of an LPG cylinder and an LPG replacement model has also been presented.

KOMPILASI HUKUM ISLAM (KHI) DAN PENDAPAT MADZHAB SYAFI’I TENTANG BATASAN MASA TUNGGU SUAMI/ISTERI MAFQUD

2018 ◽  
Vol 2 (1) ◽  
pp. 129
Author(s):  
Novita Dwi Lestari
Keyword(s):  
Islamic Law ◽  
Time Limit

mafqud is a person who has no news, unknown where it exists, whether alive or dead. Mafqud is one of the reasons for the divorce, which by court verdict contained in article 116 letter b Compilation of Islamic Law (KHI). in addressing mafqud matters KHI provides a limit waiting for 2 years, where as in the school of Shafi'i in qaul jadidnya give time for 90 years, and in his other opinion (qaul qadim) give a time limit for 4 years, then undergo iddah dead for 4 months and 10 days.

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