[Collaboration coefficient of researchers of Tehran university of medical sciences in international publications]

Introduction: Collaboration between researchers at domestic and international level is an extensive form of scientific collaboration emphasizing the importance and benefits of collaborative research. This study was aimed at investigating the rate of collaboration between researchers in Tehran University of Medical Sciences with their counterparts in other countries and institutions in the Web of Science publications

Methods: This was a survey using scientometrics indicators. The instrument of the study was the Web of Science in which the scientific products of Tehran University of Medical Sciences including 5781 records were investigated between 2006 and 2010.To determine the collaboration between researchers, collaboration coefficient formula was used

Results: The authors' collaboration coefficient mean was 0.64 showing their high interest in collaborative research. Investigation into scientific products showed that the rate of scientific collaboration was lower at the international level [22%] than the domestic level. The results showed that the researchers in Tehran University of Medical Sciences had scientific collaboration with 69 countries. The lowest annual growth rate [3.7] was related to international collaboration. Main partners of Tehran University of Medical Sciences were the USA, UK, and Canada, respectively. Based on the number of co-authors, the highest collaboration rate belonged to the documents with five to eight authors. This rate increased from 33% in 2006 to 45% in 2010

Conclusion: The findings indicated that co-authorship and collaboration in the period studied is on the rise for Tehran University of Medical Sciences suggesting researchers' interest in scientific collaboration

[ survey of knowledge production of Iranian researchers on AIDS: evidence from the web of science database]

The main purpose of this study was to investigate the knowledge productions of Iranian researchers who had published papers on AIDS in journals and sources with impact factor indexed in the Web of Science between 2000 and 2010. The amount of scientific publications by Iranian researchers on AIDS in the Web of Science was studied with scientometric methods. 336 documents with at least one author affiliated to Iranian organizations were identified. The process of science production of Iranian researchers enjoyed an increasing annual growth rate of 30%. Iranian researchers had scientific collaboration with 22 international authors dominated by American authors. Tehran University of Medical Sciences contributed to almost one fifth of the scientific productions among national organizations. Most research studies conducted by Iranian researchers on AIDS were listed under the category of infectious diseases. 35% of the journals in which Iranian researchers published their papers were American journals. However, the journal, Hepatitis Monthly, published the highest number of papers by Iranian researchers. Iran's share of journal publications enjoyed an upward trend internationally, and in this regard, Iranian researchers have remarkable contribution to international joint venture articles