The lifetime of power electronic components is often calculated from reliability reports, but this method can be discussed. We compare in this article the results of various reliability reports to an accelerated ageing test of component and introduced the load-strength concept. Large aluminium electrolytic capacitors are taken here in example in the context of the protection system of LHC (Larg...

Previous work showed that retaining residual ovarian tissue protects young mice from accelerated bone loss following ovarian failure. The present study was designed to determine whether this protection is also present in aged animals. Aged (9-12 months) C57BL/6Hsd female mice were divided into: CON (vehicle), VCD (160 mg/kg; 15d), or OVX (ovariectomized). Lumbar BMD was monitored by DXA and μCT...

Informative drop-out arises in longitudinal studies when the subject's follow-up time depends on the unobserved values of the response variable. We specify a semiparametric linear regression model for the repeatedly measured response variable and an accelerated failure time model for the time to informative drop-out. The error terms from the two models are assumed to have a common, but complete...

accelerated failure time (AFT) model, 227 accuracy quality control (AQCg; AQCp), MetaQC package, 41 aCGH (array comparative genomic hybridization), 333, 403 AD (Alzheimer’s disease), 102–103 adaptively weighted Fisher’s (AW-Fisher’s) method, 43 adjusted Rand index, 242 Affymetrix arrays, 400–401 AFT (accelerated failure time) model, 227 allele frequencies, comparison of, 14f allele-specific bin...

Schottky diodes may be realized by various techniques, depending on application and processing technology. M/ACOM has recently developed an enhancement/depletion (E/D) pHEMT process, used primarily for control circuits around its mature RF circuitry. We report here a reliability study of two diodes (configured using E-FETs), subjected to both high temperature and forward bias accelerated stress...

Instrumental Variable Estimation of Treatment Effects for Duration Outcomes In this article we propose and implement an instrumental variable estimation procedure to obtain treatment effects on duration outcomes. The method can handle the typical complications that arise with duration data of time-varying treatment and censoring. The treatment effect we define is in terms of shifting the quanti...

Treatment of hypertension with beta-blocking agents in three patients with moderately severe chronic renal failure was followed by rapid deterioration of renal function. In two of the patients the need for maintenance haemodialysis was accelerated but renal function in the third reverted to pretreatment levels after the drug was stopped. These findings suggest that until more is known about the...

It is estimated that over 90% of all new information produced in the world is being stored on magnetic media, most of it on hard disk drives. Despite their importance, there is relatively little published work on the failure patterns of disk drives, and the key factors that affect their lifetime. Most available data are either based on extrapolation from accelerated aging experiments or from re...

Psittacosis is a zoonotic infectious disease causing communityacquired pneumonia. Septic shock and respiratory failure can develop. The symptoms, diagnosis, transmission and treatment of psittacosis are discussed. In the described cases, especially polymerase chain reaction has shown to be a promising tool in diagnosing the disease. Physicians awareness might be accelerated to ensure rapid trea...