scholarly journals Reliability Test Plan Based on Logistic-Exponential Distribution and Its Application

2021 ◽  
Author(s):  
Abhimanyu Singh Yadav ◽  
Mahendra Saha ◽  
Shivanshi Shukla ◽  
Harsh Tripathi ◽  
Rajashree Dey
Keyword(s):  
Exponential Distribution ◽  
Real Life ◽  
Poisson Approximation ◽  
Quality Level ◽  
Reliability Test ◽  
Test Scheme ◽  
Test Plan ◽  
Real Life Situation ◽  
Truncated Life Test ◽  
Binomial Approximation

In this article, a reliability test plan is developed for Logistic-exponential distribution (LoED) under time truncated life test scheme. The distribution has been chosen because it can used to model lifetime of several reliability phenomenon and it performs better than many well known existing distributions. With the discussions of statistical properties of the aforesaid model, the reliability test plan has been established under the assumption of median quality characteristics when minimum confidence level P* is given. To quench the objective of the paper i.e; to serve as a guiding aid to the emerging practitioners, minimum sample sizes have been obtained by using binomial approximation and Poisson approximation for the proposed plan. Further, operating characteristic (OC) values for the various choices of quality level are placed. Also, minimum ratio of true median life to specified life has been presented for specified producer’s risk. Important findings of the proposed reliability test plan are given for considered value of k=0.75,1,2. To demonstrate the appropriateness of suggested reliability test plan is achieved using four real life situation.

scholarly journals Truncated Life Test Plans for Economic Reliability Based on Four-Parametric Burr Distribution

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Ramkumar Balan ◽  
Sajana Kunjunni
Keyword(s):  
Probability Model ◽  
Reliability Test ◽  
Test Plan ◽  
Life Test ◽  
Producer’S Risk ◽  
Sampling Plans ◽  
Burr Distributions ◽  
Burr Distribution ◽  
Truncated Life Test ◽  
Termination Time

Burr distribution is considered as a probability model for the lifetime of products. Reliability test plans are those sampling plans in which items from a lot are put to test to make conclusions on the estimate of life, and hence acceptance or rejection of the submitted lot is done. A test plan designs the termination time of the experiment and the termination number for a given sample size and producer’s risk. Tables and graphs were provided for certain specific values of designs, and it is useful to verify the optimum reliability test plan realized by Burr distributions.

Reliability Test Plans for Percentiles Based on the Harris Generalized Linear Exponential Distribution

2018 ◽  
Vol 33 (1) ◽  
pp. 61-70
Author(s):  
K. K. Jose ◽  
Albin Paul
Keyword(s):  
Exponential Distribution ◽  
Real Data ◽  
Reliability Test ◽  
Test Plan ◽  
Data Set ◽  
Linear Exponential Distribution ◽  
Family Of Distributions

Abstract In this paper, a generalization of the Harris family of distributions, namely, the Harris generalized linear exponential distribution is discussed. The use of the model is established by fitting it to a real data set. Also, we derive a reliability test plan for acceptance or rejection of a lot of products submitted for inspection with lifetimes following this distribution.

Qualitative assessment of equipment failure cause finding and removal

2018 ◽  
pp. 116-126
Author(s):  
E. A. Vakulin ◽  
A. I. Zayats ◽  
V. A. Beklemeshev ◽  
V. A. Ivashkevich ◽  
V. A. Khazhiev ◽  
...  
Keyword(s):  
Production Condition ◽  
Real Life ◽  
Open Pit Mine ◽  
Qualitative Assessment ◽  
Open Pit ◽  
Quality Level ◽  
Equipment Failure ◽  
Operation Conditions ◽  
Failure Investigation

Investigation of failures is one of the critical activities of mining and haulage equipment operability assurance in mining. Maintaining failure investigation at the required quality level, it is possible to identify provisions, rules and procedures that should be revised or changed, operation conditions that should be improved, additional personnel training, if required, etc. Investigation of failures in mines is under responsibility of machine men and electricians of maintenance and operation services. In reality, factory management and setup for production condition weak concernment of these workers in quality investigation aimed at finding of sources of equipment failures. This article describes real-life results achieved in development and use of maintenance service operation, technology and management monitoring. The requirements are substantiated for quality improvement in failure cause finding and removal in mining and haulage equipment at Chernogorsky open pit mine, SUEK-Khakassia. Causes of the present quality of failure investigation by machine men of Chernogorsky Repair and Engineering Works and Chernogorsky open pit mine are revealed. The proposed recommended practices will improve quality of mining and haulage equipment failure investigation.

Treadmill Walking in Old Age May Not Reproduce the Real Life Situation

1993 ◽  
Vol 41 (1) ◽  
pp. 15-18 ◽  
Author(s):  
Carolyn Greig ◽  
Felicity Butler ◽  
Dawn Skelton ◽  
Siti Mahmud ◽  
Archie Young
Keyword(s):  
Old Age ◽  
Real Life ◽  
Treadmill Walking ◽  
Life Situation ◽  
The Real ◽  
Real Life Situation

scholarly journals Waterpipe effects on pulmonary function and cardiovascular indices: a comparison to cigarette smoking in real life situation

2014 ◽  
Vol 26 (10) ◽  
pp. 620-627 ◽  
Author(s):  
Nelly Layoun ◽  
Nadine Saleh ◽  
Bernadette Barbour ◽  
Sanaa Awada ◽  
Samar Rachidi ◽  
...  
Keyword(s):  
Cigarette Smoking ◽  
Pulmonary Function ◽  
Real Life ◽  
Life Situation ◽  
Real Life Situation

Using metavisualization to revise an explanatory model regarding a chemical reaction between ions

2021 ◽  
Author(s):  
Solange Wagner Locatelli ◽  
Bette Davidowitz
Keyword(s):  
Undergraduate Students ◽  
Chemical Reaction ◽  
Chemistry Education ◽  
Self Regulation ◽  
Real Life ◽  
Explanatory Models ◽  
Explanatory Model ◽  
Future Application ◽  
Correct Figure ◽  
Real Life Situation

The objective of this work was to evaluate the implementation of a metavisual strategy for students to revise and self-regulate concepts arising in a study of a chemical reaction between ions. For this purpose, two chemistry education undergraduate students at a Brazilian public university carried out an investigative activity, involving metavisual steps, to revise explanatory models at the submicro level. Students were given a problem, namely a reaction between ions drawn from a real-life situation and were provided with clay to construct an explanatory model of the submicro level for the initial and final stages of the reaction. The students were asked to compare their clay model with an example of a scientifically correct figure of the submicro level of the reaction generated by the researchers. At this stage students were given the option to reconstruct their model. Data were captured via photographs of the clay models and students’ verbal discussions as they proceeded through the activity. The findings reveal evidence of self-regulation of mental models at the submicro level, from the interaction of prior knowledge, chemical diagrams and discussions and reflections by the pair of students. Difficulties regarding chemical formulae were also observed in relation to the symbolic level. Finally, there are implications for teaching chemistry, since teachers in training need to experience metavisual strategies for future application in their classrooms.

Low efficacy of nevirapine (HIVNET012) in preventing perinatal HIV-1 transmission in a real-life situation

AIDS ◽  
2004 ◽  
Vol 18 (13) ◽  
pp. 1854-1856 ◽  
Author(s):  
Ann Quaghebeur ◽  
Lillian Mutunga ◽  
Fabian Mwanyumba ◽  
Kishor Mandaliya ◽  
Chris Verhofstede ◽  
...  
Keyword(s):  
Real Life ◽  
Life Situation ◽  
Perinatal Hiv ◽  
Real Life Situation ◽  
Hiv 1
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