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Background: Its contact the main reason for the use of mobile phones is especially students living in dormitories. As well as students to communicate in cyber space than in real space of communication are interested, this can threaten their mental health. Objectives: The current study aimed at exploring the amount of mobile phone overuse and determining the association between mobile phone overuse and depression among medical college students in Hamadan, West of Iran. Methods: The current cross sectional study was conducted through the stratified sampling method on 300 students residing in dormitories of Hamadan University of Medical Sciences in 2016. The subjects completed a self-administered questionnaire including demographic characteristics, the cellphone overuse scale (COS), and the Beck depression inventory. Data were analyzed with SPSS version 16 using the linear regression analysis, independent t test, and one-way ANOVA. Results:The results showed that 45% of the students use their mobile phone for 3 to 6 hours per day; 32% had excessive use of cellphone. Similarly, 22% of participants had minor depression and 20.7% of the students had moderate depression. Also, the results showed that cellphone overuse significantly promoted depression (ß = 0.351, P < 0.001). Conclusions: According to the obtained results, excessive users of cellphones were more depressed. It seems that living in student dormitories provides better conditions for mental disorders. Therefore, it seems necessary to consider the psychological problems of dormitory students.

This paper investigates the factors affecting medical bloggers' knowledge sharing behavior from both personal and external aspects. We develop a model based on the social cognitive theory and augment it with the social capital theory. The model is empirically examined based on the survey data collected from 75 bloggers writing on medical issues, and evaluated with confirmatory factor analysis and structural equation modeling. Among the personal factors, we examined outcome expectations including reputation and enjoyment in helping others. Encouragement by others, identification and interaction ties were investigated as external factors. Enjoyment in helping others and reputation were found to have significant direct affect on medical bloggers' knowledge sharing behavior, while encouragement by others, identification, and interaction ties showed no significant direct affect. However, encouragement by others exhibited significant impact on reputation and enjoyment in helping others. The implications for theory and practice, and future possible research are discussed.

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At global and local levels, we are observing an increasing range and rate of disease outbreaks that show evidence of jumping from animals to humans, and from food to humans. Zoonotic infections (i.e. Hendra, swine flu, anthrax) affect animal health and can be deadly to humans. The increasing rate of outbreaks of infectious diseases transferring from animals to humans (i.e. zoonotic diseases) necessitates detailed understanding of the education, research and practice of animal health and its connection to human health. These emerging microbial threats underline the need to exploring the evolutionary dynamics of zoonotic research across public health and animal health. This study investigates the collaboration network of different countries engaged in conducting zoonotic research. We explore the dynamics of this network from 1980 to 2012 based on large scientific data developed from Scopus. In our analyses, we compare several properties of the network including density, clustering coefficient, giant component and centrality measures over time. We also map the network over different time intervals using VOSviewer. We analyzed 5182 publication records. We found United States and United Kingdom as the most collaborative countries working with 110 and 74 other countries in 1048 and 599 cases, respectively. Our results show increasing close collaboration among scientists from the