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Construction defects are major components that result in negative impacts on project performance including schedule delays and cost overruns. Since construction defects generally occur when a few associated causes combine, a thorough understanding of defect causality is required in order to more systematically prevent construction defects. To address this issue, this paper uses association rule...

There is an ongoing debate about whether the Internet is like a public sphere or an echo chamber. Among many forms of social media, Twitter is one of the most crucial online places for political debate. Most of the previous studies focus on the formal structure of the Twitter political field, such as its homophilic tendency, or otherwise limits the analysis to a few topics. In order to explore ...

This survey is stratified random sampling among 425 students in Islamic Azad University of Mashhad (north east of Iran) in 2011 the questionnaire has been implemented in the research. The validity of the questionnaire for face validity and Cronbach's alpha reliability coefficient is used. In this study, social capital indexes like "social participation, social trust and networks of social rel...

The set of interpersonal relationships on a social network service or a similar online community is usually highly heterogenous. The concept of tie strength captures only one aspect of this heterogeneity. Since the unstructured text content of online communication artefacts is a salient source of information about a social relationship, we investigate the utility of keywords extracted from the ...