Empirical studies of user activity, based on data collected from the systems with which users interact, present technical challenges related to the transformation of data streams to a form suitable for analysis. In this paper we discuss the particular challenges confronted during a study of user interruption behaviour based on low-level “keystroke” data and the ways in which these challenges we...

Enterprise 2.0 applications, such as blogging systems, are increasingly prevailing in corporate contexts. As intra-organizational blogs are expected to provide a new approaching to building a flexible intra-organizational networking platform which could effectively facilitate knowledge sharing, it is worthwhile to address why and how the employees may accept a blogging system and keep blogging ...

PURPOSE We evaluate the efficacy of a short family intervention in reducing sexual risk behavior, drug use, and delinquent behaviors among homeless youth. METHODS A randomized controlled trial of 151 families with a homeless adolescent aged 12 to 17 years. Between March 2006 and June 2009, adolescents were recruited from diverse sites in Southern California and were assessed at recruitment (b...

The aim of this paper is to investigate the effect of the Chinese B share market reform on the correlation and information transmission between A and B Shares issued in the Shanghai and Shenzen stock exchanges. Daily returns for the Shanghai A share index (SHA), Shanghai B share index (SHB), Shenzen A share index (SZA) and Shenzen B share index (SZB) are used for the period 6 October 1992 to 8 ...

The development of science is inevitably affected by social dynamics since more and more scholarly activities are happening online. With the development of Internet and Web 2.0, the evaluation, spread, and discussion of scholarly information and publications are exposed to the whole society, breaking the strict borderline between scientists and amateurs. This paper proposes to model scientific ...

Social tagging systems have established themselves as an important part in today’s web and have attracted the interest of our research community in a variety of investigations. Henceforth, several assumptions about social tagging systems have emerged on which our community also builds their work. Yet, testing such assumptions has been difficult due to the absence of suitable usage data in the p...

The paper Rational Drug Therapy by Mathur el al.(1) made interesting reading. The authors have given very useful suggestions for curbing the problem of irrational drug use. However, most of these suggestions are based on the 'policing' approach which, we are afraid, may not succeed in country like ours. Unfortunately, our legal system leaves a lot of loop holes (albiet in good faith) which are ...

INTRODUCTION AND OBJECTIVE Globally, children who work and live on the streets are at higher risk of undesired behavioral health outcomes, including increased drug use and abuse. Considering the rapid growth of this population in Iran and the lack of program planning that is partly due to a scarcity of research-based information, this study was conducted in 2013 to investigate drug use among st...

In this study, teachers’ acceptance and use of an educational portal is assessed based on data from two sources: usage data (number of logins, downloads, uploads, reactions and pages viewed) and an online acceptance questionnaire. The usage data is extracted on two occasions from the portal’s database: at survey completion (T1) and twenty-two months later (T2). Framework for this study is C-TAM...