objective: an important factor in the prevention of industrial accidents is the employees’ ability to maintain their awareness of the work situation, understand the information it holds, and predict the development of the situations. in this study, we examined the role of work stress and sleepiness in predicting work situation awareness among workers.  methods: the present study was a cross-sec...

I consider unsupervised extensions of the fast stepwise linear regression algorithm [5]. These extensions allow one to efficiently identify highly-representative feature variable subsets within a given set of jointly distributed variables. This in turn allows for the efficient dimensional reduction of large data sets via the removal of redundant features. Fast search is effected here through th...

to study of genetic diversity of rapeseed genotypes using multivariate methods under normal and drought stress conditions, 16 genotypes were evaluated using a randomized complete blocks design with three replications in razi university in 2007-08 cropping season. factor analysis under normal condition showed that nine factors explained 89.05 percentage of total data variation, and under drought...

Multiple regression is a powerful set of methods for examining specific scientific hypotheses and relationships among experimental, quasiexperimental, and nonexperimental data. Typically, multiple regression is used as a data-analytic strategy to explain or predict a criterion (dependent) variable with a set of predictor (independent) variables. Wampold and Freund (1987) provided an important a...

background: oral health in down syndrome (ds) children has some peculiar aspects that must be considered in the follow-up of these patients. the objective of the present study was to assess the prevalence of dental caries and treatment needs among children with ds in yemen and also to investigate the association between these outcomes with various socio-demographic and clinical variables. mater...

The purpose of this research was to determine knowledge management in the empowerment of the experts of Agricultural Organization in Ilam County of Iran. The statistical population was composed of all employees with the organizational positions of expert or higher in Agricultural Organization of Ilam (N=150). A self-designed questionnaire was used as data collection tool whose face and content ...