In reliability and lifetime testing, comparison of two groups of data is a common problem. In some lifetime experiments, making a quick and efficient decision is desirable in order to save time and costs. To this end, a progressive censoring scheme can be useful, with censoring occurring at different stages [2]. This paper presents a nonparametric predictive inference (NPI) approach to compare ...

QFN packages have become mainstream designs for mobile applications. As more applications adopt the QFN style packages, I/O count requirements are increasing. The typical method for increasing pin count in a QFN package is to increase the body size to accommodate the additional lead fingers. This is undesirable though, as mobile device users are pushing for smaller package sizes. By using a dua...

OBJECTIVE In this article, we compared the costs of testing meconium for alcohol exposure in newborns with the lifetime benefits of early detection and intervention. METHOD A decision analytic model was developed to assess the cost-effectiveness of testing meconium for two scenarios: (1) all infants in the Canadian province of Ontario and (2) infants who have an older sibling diagnosed with f...

To decouple test code from web page details, web testers adopt the Page Object design pattern. Page objects are facade classes abstracting the internals of web pages (e.g., form fields) into high-level business functions that can be invoked by test cases (e.g., user authentication). However, writing such page objects requires substantial effort, which is paid off only later, during software evo...

Strain-controlled fully reversed fatigue testing, or strain-life provides critical information on material lifetime and damage response. Strain-life data in hydrogen gas environments is missing the literature could provide valuable insights into effects mechanical response of metals such as steel. We adapted existing hydrogen-gas-environment mechanical-testing equipment, which had been designed...

Abstract: To ensure the rail transportations safety, evaluation of fatigue behavior of the rail steel is necessary. High cycle fatigue behaviour of a rail steel was the subject of investigation in this research using fracture mechanics. Finite element method (FEM) was used for analyzing the distribution of the stresses on the rail, exerted by the external load. FEM analysis showed that the ...

Within this study, we investigate the intrinsic photostability of thin-film solar cells, here organic photovoltaic cells. Since degradation under natural sun light proceeds within timeframe months and years, process needs to be speeded up for fast material analysis screening, using high-concentration accelerated lifetime testing (high-C ALT). For purpose, established setups allowing irradiances...

Vinod Kumar and Shilpi Gupta 1. Department of Maths, Stats & Comp. Sc., G.B. Pant Univ. of Ag. & Tech., Pantnagar, India. 2. Amrapali Institute of Management and Technology, Haldwani, India. . Abstract The present paper deals with the reliability and hazard rate estimation of a Weibull type life testing model. Its use as a life testing model has also been illustrated. The proposed model has bee...