Often, relations between economic variables cannot be exploited for forecasting, suggesting that predictors are weak in the sense estimation uncertainty is larger than bias from ignoring relation. In this paper, we propose a novel bagging estimator designed such predictors. Based on test finite-sample predictive ability, our shrinks ordinary least squares estimate—not to zero, but towards null ...

We develop new improved real-time delay predictors for many-server service systems with a time-varying arrival rate, a time-varying number of servers and customer abandonment. We develop four new predictors, two of which exploit an established deterministic fluid approximation for a many-server queueing model with those features. These delay predictors may be used to make delay announcements. W...

background: reintubation in patients after cardiac surgery is associated with undesirable consequences. the purpose of the present study was to identify variables that could predict reintubation necessity in this group of patients. methods: w e performed a prospective study in 1000 consecutive adult patients undergoing cardiac surgery with cardiopulmonary bypass. the patients who required reint...

background: this paper aims to examine the reproductive health and behaviors which might expose young people at risks of stis/hiv and potential correlates of such behaviors among female college students in tehran. methods: this paper focuses on the study conducted on a sample of 1743 female undergraduate students in four multidisciplinary universities in tehran during 2005-2006 using a two-stag...

nonalcoholic fatty liver disease (nafld) is one of the aspects of metabolic syndrome (mets). due to the increase of mets in iran, this study was conducted to determine the prevalence of nafld, its potential predictors and their sex distribution in north of iran, amol.in 2008 this population based cross-sectional study included 5023 adult individuals who were randomly selected from amol healthca...

abstract background: this study sought to determine patient characteristics, process of care, and outcome as predictors of reintubation after open-heart surgery. methods: we performed a retrospective case control study that included all patients undergoing cardiac surgery who required reintubation and an equal number of control patients not requiring reintubation. putative risk factors were ana...

patients and methods in this cross-sectional study, conducted in isfahan and kermanshah medical universities in iran, a total of 425 male medical students were randomly selected with the proportional to size from different faculties to participate voluntarily in the study. a self-report written questionnaire was applied to collect data. then, the obtained data were analyzed by spss version 20 u...

introductionchildren with severe asthma attack are a challenging group of patients who could be difficult to treat and leading to significant morbidity and mortality. asthma attack severity is qualitatively estimated as mild, moderate and severe attacks and respiratory failure based on conditions such as respiration status, feeling of dyspnea, and the degree of unconsciousness. part of which ar...

We present SpeedBoost, a natural extension of functional gradient descent, for learning anytime predictors, which automatically trade computation time for predictive accuracy by selecting from a set of simpler candidate predictors. These anytime predictors not only generate approximate predictions rapidly, but are capable of using extra resources at prediction time, when available, to improve p...