introduction: compulsive internet use scale (cius) is a newest and prestigious questionnaire in the diagnosis of internet addiction .the goals of this study was to investigate the reliability and validity (psychometric properties) of persian version of cius in internet users of isfahan's universities. methods: in this descriptive and cross- sectional research  400 isfahan university students we...

background different measuring tools have been used to understand the outcomes of renal replacement therapies. the goal of renal transplantation is both to ensure survival, and to promote quality of life in the patients. one of the widely used disease-specific instruments to measure the quality of life is the kidney transplant questionnaire (ktq-25). objectives the current study aimed to perfor...

In this paper we study multiagent models with time-varying type change. Assume that there exist a closed system of N agents classified into r types according to their states of an internal system; each agent changes its type by an internal dynamics of the internal states or by the relative frequency of different internal states among the others, e.g., multinomial sampling. We investigate the as...

In addition to doing own research and development, firms typically are engaged in the acquisition of knowledge on the technology market. Using data from the Community Innovation Survey on Belgian manufacturing firms, we provide econometric evidence consistent with complementarity between these different innovation activities, i.e. the marginal return to one activity increases with the level of ...

Although one tenet in the alliance literature is that firms learn from prior experience, we posit that any potential learning effects depend on the type of experience. In particular, we hypothesize that alliance exploitation experience has positive effects on R&D project performance, while alliance exploration experience has negative effects. We further posit that an internal exploration compet...

für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namen...

This study looks at the role of internal linkages in highly competitive clusters. Besides serving as a mechanism to source knowledge, we argue that strong internal linkages also represent tighter control over local innovation and higher levels of technological interdependency across locations, which allow firms to increase internalization and reduce the risk of knowledge outflow to competitors....

abstract isolates of rhizoctonia spp., obtained from sugar beet roots and crowns with dry rot symptoms that had been collected from various sugar beet production regions in khorasan razavi province during 2008 and 2009, were investigated in this research. characterization by conventional techniques and molecular methods using species-specific primers was carried out. results showed that from 36...

Sharing knowledge across borders has proven to be especially relevant to multinational corporations (MNCs). Foreign subsidiaries have become active players in these knowledge flows. However, the network effects of interacting with multiple agents on the evolution of the R&D role played by subsidiaries are still undeveloped. The present study focuses on changes in subsidiary capabilities and on ...