abstract purpose: this research aims at examining the university librarians’ viewpoints about digital reference services at state universities of isfahan based on ifla 2008 standards. methodology: the research method is descriptive survey study. the study population consists of university librarians of state universities in isfahan. after determining the variance, the sample was estimated 113 a...

New sampling designs for the Autumn Portuguese bottom trawl survey (ptBTS) were investigated to explore alternative spatial configurations and possible increments on sample size. The currently used stratified random design and five proposals of systematic based designs were assessed by a simulation study, adopting a geostatistical approach based on likelihood methods of inference. The construct...

abstract: the subject of the life satisfaction is one of the important issues in development economics literature. in this paper, the main determinants of life satisfaction such as economic factors have been considered. for data analysis, the indices of life satisfaction have been collected among 400 people in tehran and neibouring provinces by applying stratified random sampling method. then, ...

the aim of this study is investigation of the effect of customer orientation on strategic innovation in nikan hospital, which considered as an applied research and the research methodology as descriptive and based on survey. the population consisted of hospital managers and customers of nikan hospital; customers were unlimited and managers population consisted of 20 person and the number of man...

This paper’s centre of attention is on the problem of data mining (in general) and clustering (in specific) on a hidden web data. We know that data mining is a process that analyzes and extracts knowledge from large amounts of data which provides useful information to users. Hidden or deep web data is the database located at remote system .So, to access such data, we need query interface or HTM...

the purpose of this study was to identify factors that effecting on wood and papers student’s entrepreneurial spirit. statistical population of this research consisted of whole wood and paper students in college of agricultural and natural of tehran university (n= 263). a stratified random sampling method was used to select 100 students applying morgan’s table. the main tool to collect data was...

Monitoring programs for urban runoff have not been assessed for effectiveness or efficiency in estimating mass emissions. In order to determine appropriate designs for stormwater, total suspended solids (TSS) and flow information from the Santa Ana River was collected nearly every 15 min for every storm of the 1998 water year. All samples were used to calculate the "true load" and then three wi...