shiftwork that affects diverse aspects of human life is arranged in various schedules. the main purpose of this study was to compare psycho-social problems among employees working in different 12-hour shift schedules of iranian petrochemical industries. this cross-sectional study was carried out at eight petrochemical companies in asalooyeh area. the study population consisted of 549 shift work...

We propose a simple server-based electronic signature system in which a small number of common private keys are used. The motivation of such a system is to escape the scalability and complexity problems that arise if a large-scale Public Key Infrastructure (PKI) is used. We argue that the assumption of personal private keys is the main reason for those problems and high cost of electronic signa...

abd al - salam al-’ujayli is a syrian physician, literary man and novelist. by his specific style and personal method in expression and description, al-’ujayli is a link between leading authors of thirty and forty decades of twenty century on one hand, and innovators of fifty and sixty decades on the other hand. his literary works are a combination of abilities of these two generations. his sty...

regarding the importance of entrepreneurial decision making process and due to the insufficiency of pervious research in considering qualitative aspects of the issue, this study aims to conceptualize entrepreneurial decision making process in small & medium size enterprises. for this purpose, the qualitative case study method was applied among iranian prominent entrepreneurs in the year of 2009...

Personal Knowledge Management (PKM) and Personal Information Management (PIM) are two related research problems currently being examined by different, although potentially overlapping communities of researchers. We believe that the crossfertilisation of ideas between these communities could lead to progress in both fields. With this aim in mind, in this position statement we outline our researc...

improvement in the quality of teacher education is an issue of considerable concern to every country including iran. the challenges that student-teachers face during their education can be highly influential in this regard. consequently, the present study was an attempt to come up with a model for the factors challenging iranian efl preservice teachers using a grounded theory approach. for this...

BACKGROUND Weight-related problems, including obesity, eating disorders, and disordered eating, are major public health problems in adolescents. The identification of shared risk and protective factors for these problems can guide the development of relevant interventions to a broad spectrum of weight-related problems. This paper examines the prevalence and co-occurrence of overweight, binge ea...