introduction: using physiologic scoring systems for identifying high-risk patients for mortality has been considered recently. this study was designed to evaluate the values of acute physiology and chronic health evaluation ii (apache ii) and simplified acute physiologic score (saps ii) models in prediction of 1-month mortality of critically ill patients. methods: the present prospective cross ...

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abstract background: inflammatory bowel disease (ibd) is a group of inflammatory conditions of the colon and small intestine that may have critical consequences on patient’s quality of life (qol). many disease-specific qol tools have been developed recently. the mcmaster inflammatory bowel disease questionnaire (ibdq) is one of them. the aim of this study was to translate into persian and evalu...

validation is an important enterprise especially when a test is a high stakes one. demographic variables like gender and field of study can affect test results and interpretations. differential item functioning (dif) is a way to make sure that a test does not favor one group of test takers over the others. this study investigated dif in terms of gender in the reading comprehension subtest (35 i...

Clustering is more subjective work than classification and regression. Though classification and regression have many general validation measures, clustering has few validation measures. Also, it is difficult to develop general measure of cluster validation. So, many evaluation measures have been published for cluster validation. In this paper, we propose an ensemble method of validation for cl...

Six simulation professionals present their views on the directions that they believe that verification, validation, and accreditation research should take. Two of the six are active verification, validation, and accreditation researchers from academia, two develop industry simulation models, and two work in verification, validation, and accreditation of military simulation models. A number of a...

quantitative relationships between molecular structure of forty eight aldehyde compounds with their known cathepsin k inhibitory effects were discovered by partial least squares (pls) method. evaluation of a test set of 10 compounds with the developed pls model revealed that this model is reliable with a good predictability. since the qsar study was performed on the basis of theoretical descrip...

background: as a disease of motor nervous system (motor neuron  disease), amyotrophic  lateral  sclerosis (als)  has  a great  impact  on  several  aspects  of  quality  of  life (qol). generic questionnaires of qol do not address all the especial features  of als and  therefore  translation  and  validation of disease specific questionnaires such as amyotrophic lateral sclerosis assessment  qu...

in iran, most mountainous watersheds do not have enough hydrometery stations and defective stations have sparse data. because of limited availability of hydrologic data, watershed modeling plays a crucial role in development of local resources. in this study, swat was applied to simulate runoff in marun dam (idanak) watershed, a sub-basin of marun catchment. calibration and sensivity analyses w...

in this paper, the quantitative structure activity-relationship (qsar) of the ccr2b receptor inhibitors was scrutinized. firstly, the molecular descriptors were calculated using the dragon package. then, the stepwise multiple linear regressions (sw-mlr) and the genetic algorithm multiple linear regressions (ga-mlr) variable selection methods were subsequently employed to select and implement th...