Reliability is one of the key issues for the application of Silicon carbide (SiC) diode in high power conversion systems. For instance, in high voltage direct current (HVDC) converters, the devices can be submitted to high voltage transients which yield to avalanche. This paper presents the experimental evaluation of SiC diodes submitted to avalanche, and shows that the energy dissipation in th...

There has long been debate about the relative merits of decision theoretic methods and heuristic rule­ based approaches for reasoning under uncertainty. We report an experimental comparison of the performance of the two approaches to troubleshooting, specifically to test selection for fault diagnosis. We use as experimental testbed the problem of diagnosing motorcycle engines. The first approac...

Silicon carbide (SiC) power MOSFETs are characterised by potentially thermally unstable behaviour over a broad range of bias conditions. In the past, such behaviour has been shown for silicon (Si) MOSFETs to be related to a reduction of Safe Operating Area at higher drain–source bias voltages. For SiC MOSFETs no characterisation exists yet. This paper presents a thorough experimental investigat...

The paper considers an empirical approach to the root-cause analysis of a certain kind of automobile tire failure. Tire life data are obtained from a laboratory test, which is developed to duplicate field failures. A number of parameters related to tire geometry and physical properties are selected as explanatory variables that potentially affect a tire’s life on test. Analysis of the life test...

The conceptual framework for causes presented here is intended neither as a review nor an expansion of knowledge, but rather as a viewpoint which bridges the gap between metaphysical notions of cause and basic epidemiologic parameters. The focus, then, is neither metaphysics nor epidemiology, but the gulf between them. In the same spirit as recent discussion on these pages about definitions of ...

objective this study was designed to determine the etiology of status epilepticus (se) andits relation to mortality. materials and methods this descriptive study was carried out based on the medical records of 40 patients with diagnosis of se discharged from pediatric hospital of bandar abbas between march 2002 and march 2004. multivariant analysis was pereformed to determine the prevalence of ...

error is an inevitable part of life and cannot be completely eliminated, but it can be minimized. a root cause analysis is a technique for understanding the systematic error causes that is involved beyond a person or people to implement an errors and including field and environmental causes of errors when occur in this situation too. an important factor of an error occurrence is a root cause (c...

this paper reviews the relationship between inflation rate and minimum wage in iran’s economy over the 1969-2005. according to the economic literature, there is a narrow relationship between inflation rate and minimum wage. some economists believe in increased inflation due to minimum wage. the other group of economists considers the increased inflation as a cause for increasing minimum wage. t...

conclusions the most common cause of restoration replacement in patients referred to the babol university of dentistry during years 2013 and 2014 was secondary caries that were found in class ii restorations. patients and methods age, sex, type of occlusion, dmf, existing parafunction, type of tooth, class and reason of composite restoration replacement was recorded for patients who had referre...