Emerging adulthood often entails heightened risk-taking with potential life-long consequences, and research on risk behaviors is needed to guide prevention programming, particularly in under-served and difficult to reach populations. This study evaluated the utility of Respondent Driven Sampling (RDS), a peer-driven methodology that corrects limitations of snowball sampling, to reach at-risk Af...

objective: the aim of this study was to exploring the problems and challenges of dissertation writing process of library and information science in regard to students’ perspective.   method: the survey population was consisted of all library and information sciences’ students who graduated from one of the universities in tehran in recent years. the sample of research was consisted of 20 student...

conclusions it is suggested that the steward of health in iran, the ministry of health, develops an appropriate infrastructure and finally puts a high priority on the implementation of the health information management system for elderly health sector in iran. background there are increasing change and development of information in healthcare systems. given the increase in aging population, man...

INTRODUCTION The World Health Organization (WHO) is widely regarded as the preeminent international authority on health and scientific matters. Its information mandate is a powerful one, for it enables the WHO to construct issues as legitimate ones for concern that should be addressed in particular ways. METHODS Intensive interviewing of WHO staff was used to elicit writing and editing proces...

Œis paper introduces new techniques for sampling aŠributed networks to support standard Data Mining tasks. Œe problem is important for two reasons. First, it is commonplace to perform data mining tasks such as clustering and classi€cation of network aŠributes (aŠributes of the nodes, including social media posts). Furthermore, the extraordinarily large size of real-world networks necessitates t...

Targeted sampling (TS) and respondent-driven sampling methods (RDS) are commonly used methods to sample ‘hard-toreach’ populations, like injection drug users (IDU). There are notable differences between each: TS uses street-based and community based outreach, informed by ethnographic data to locate and recruit a target population [1], but lacks statistical methods to correct for potential biase...

In process plants with recycle streams some level control architectures are inoperable. Their use leads to large excursions in manipulated and/or controlled variables and this behavior has been termed the snowball effect. The snowball effect is a steady state phenomenon and it can be analyzed using steady state process models. In this paper a steady state mixed integer nonlinear programming (MI...