We propose a new estimator to combat the multicollinearity in the linear model when there are stochastic linear restrictions on the regression coefficients. The new estimator is constructed by combining the ordinary mixed estimator (OME) and the principal components regression (PCR) estimator, which is called the stochastic restricted principal components (SRPC) regression estimator. Necessary ...

For second-hand products sold with warranty, the expected warranty cost for an item to the manufacturer, depends on (i) the age and/or usage as well as the maintenance history for the item and (ii) the terms of the warranty policy. The paper develops probabilistic models to compute the expected warranty cost to the manufacturer when the items are sold with free replacement or pro rata warrantie...

We report the first detection of triply-deuterated methanol, with 12 observed transitions, towards the low-mass protostar IRAS 16293−2422, as well as multifrequency observations of CH3OH, used to derive the column density of the main isotopomer CH3OH. The derived fractionation ratio [CD3OH]/[CH3OH] averaged on a 10′′ beam is 1.4%. Together with previous CH2DOH and CHD2OH observations, the prese...

conclusions independent variables such as sex, age, hdl-c, sys-bp, bmi, smoking, cholesterol and hs-crp were considered as influencing variables, and education, marital status, disease history, height, waist circumference, diastolic blood pressure and low density lipoprotein were removed from the models. background cardiovascular disease is considered as one of the most common diseases, causing...

brain injury is a complex event leading to tissue damage and functional deficits by primary and secondary mechanisms. since the application of tissue engineering approaches is a new topic in the treatment of brain injury, producing a proper experimental model to evaluate the effects of tissue engineering products on damaged brain tissue is required. in the present study, a simple and reproducib...

spinal cord injury (sci) leads to a significant health problem associated with a broad range of secondary complications and disabilities. in this regard, animal models can help us to understand the pathobiology of sci and evaluate the effects of potential treatments for sci. in contusion models of sci, different devices including surgical spring-loaded clips, balloons, forceps, weights and the ...

in this paper, by using the survival models, survival functions for the time from birth to the event of using formula (i.e. the time that baby in fed by breast milk) in urban and rural areas of takestan (iran, winter 1998) are reported. later the relation between the mentioned time and some factors are also discussed. the kaplan-meire method and cox regression are used in this paper as well. 48...

introduction: organizational memory (om) is a tool for implementation of knowledge management. the objective of this study was designing an om for medical records (mr) departments. methods: this descriptive study was carried out in 2007. the study population consisted of all employees in five teaching hospitals in tabriz. process and required knowledge identification was performed through quest...