In this study, an adaptive Bayesian decision model is developed to determine the optimal replacement age for the systems maintained according to a general age replacement policy. It is assumed that when a failure occurs, it is either critical with probability p or non-critical with probability 1− p, independently. A maintenance policy is considered where the non-critical failures are corrected ...

BACKGROUND Well known risk factors for upper extremity deep venous thrombosis are the presence of a central venous catheter (CVC) and malignancy, but other potential risk factors, such as surgery, injury and hormone replacement therapy (HRT), have not yet been explored. METHODS We performed a population-based case-control study including 179 consecutive patients, aged 18-70 years with upper e...

background: premature ovarian failure (pof) is a common condition; its incidence is estimated to be as great as 1 in 100 by the age of 40 years. physiologic replacement of ovarian steroid hormones seems rational until the age of normal menopause. temporary return of ovarian function and pregnancy may occur rarely in women with pof. we report a case of pof who conceived during hormone replacemen...

With open access gaining momentum, open reviews becomes a more persistent issue. Institutional and multidisciplinary open access repositories play a crucial role in knowledge transfer by enabling immediate accessibility to all kinds of research output. However, they still lack the quantitative assessment of the hosted research items that will facilitate the process of selecting the most relevan...

UNLABELLED Interpretation of pulmonary function tests basically depends on prediction of normal values derived from equations using non-deformed body height. In many patients body height can not be accurately measured. The arm-span method has been used for estimating body height, but the normal relationship between body height and arm span is not exact and differs in various ethnic groups and e...

height measurement is an important part of nutritional assessment especially in children. however, in such cases as hospitalized or certain kinds of malformations or disabilities, height cannot be measured accurately. we aimed to determine appropriate height predictors in iranian healthy children for further use in disabled and/or hospitalized children. a total of 730 apparently healthy childre...

CONTEXT Mid-arm circumference of the newborn is strongly associated with birth weight and is a very good indicator of low and insufficient birth weight. However, there are few Brazilian studies on the relationship between mid-arm and head circumferences and, thus, this does not form part of the routine evaluation for newborns. OBJECTIVES To establish the mid-arm circumference and mid-arm/head...

The effect of dosage of continuous venovenous hemodiafiltration (CVVHDF) on survival in patients with acute renal failure (ARF) is unknown. In this study, 200 critically ill patients with ARF were randomly assigned to receive CVVHDF with prefilter replacement fluid at an effluent rate of either 35 ml/kg per h (high dosage) or 20 ml/kg per h (standard dosage). The primary study outcome, survival...

Age replacement policy is concerned with finding an optional time to minimize the cost, at which time the unit is replaced even if it does not fail. So far, age replacement policy involving random age has been proposed. This paper will assume the age of the unit is an uncertain variable, and find the optimal time to replace the unit.