نشریه بازیابی دانش و نظام های معنایی
پیاپی 18 (بهار 1398)

This study has been done to explore the Intellectual Structure of the Positive Psychology studies. Library Studding is the approach of present research, in theoretical literature, and application in terms of the nature, and analytical in analysis of findings, and method and finally clustering have used, those are text mining techniques to explore the Intellectual Structure and relationships the topics of positive psychology studies. The populations studied in this research are the 1086 papers that are published in positive psychology topics around the world, since 2000 to 2012, and are indexed in the Scopus database. After extraction of related terms from the titles, abstracts and keywords of articles and applying text mining techniques and words stemming, a co-word matrix was created with dimensions of 43 × 43. For the interpretation of relationship major and minor categories, this matrix was standard and based on the similarity was interred to XL.STAT Software. The terms were optimized in 7 clusters. For the next steps of analysis has been used from MATHLAB software, and for display coword network from Pajak software. The results of this research show that Cluster 2 by 10, and Cluster 4 by 9 terms, are known as the principal clusters. The Cluster 5 has the most of selective terms from the major categories and Cluster 2 & 1 have minimum distance that it shows the relationship between the major and minor topics in these clusters is higher.

Abstract The purpose of this article is to scientometrics study of scientific production of the journal of tax research as the only scientific journal of the field of tax knowledge in Iran between 2008 - 2018. The data were collected using a check list tool and statistical analyzed using excel software. Results show that during the years studied, 626 authors contributed to the production of 273 articles, of which 484 were men and 142 women. considering the level of education and scientific ranking of the authors, MA degree with 42% and assistant professors with 28% are in the top of the ranking list of authors. In the meantime, 15% of articles have only one author and 85% are the results of grouping work. Among the universities and scientific centers, Allameh Tabataba'i University with 27 articles ranked first and Islamic Azad University of Central Tehran Branch, along with the Office of Tax Studies and Research, with 16 papers ranked second. In terms of topic orientation, 11% of the publications are in the field of evaluation of staff and tax departments and corporate income tax with 7.3%, and tax evasion with 6.6% in the next rank.

The purpose of this study was to identify the average willingness to pay for the services of Kermanshah Medical Libraries and its effective factors. The present study is based on a survey method and conditional valuation, which is part of the preferred method of reporting, to determine the willingness to pay. the research population of all users of Kermanshah University of Medical Sciences libraries was 7470 people. The sample was 553 people based on Michel and Carson's formula. a simple random sampling method was used to select the sample. the data gathering tool was a two-dimensional questionnaire. The average annual willingness of users to use the services of medical science libraries was 20600 toman. Also, the results showed that the education variable had a positive and significant effect on the willingness to pay the users. From the perspective of users, among the various resources and services of medical libraries, books and publications, online databases, offline databases and theses of first rank are other services, Which will be worth the cost. The results of this study showed that users are willing to pay annual or monthly amounts to maintain the current services of medical university libraries. It can be said that if paying money would improve the services and change the current situation of the library, It is clear that according to the view of users, higher economic value and, consequently, the willingness to pay for a variety of resources and services of academic libraries will increase significantly.

The purpose of this research is to investigate the information-seeking behaviourof Shiraz Islamic Azad University postgraduate students, and how to prioritize and use of various information sources. The research also investigate the role of demographic characteristics in students information-seeking process, as well as use of various information sources. The research method is surveying. The population of the study consisted of 298 postgraduate students that randomly selected through classified ratio sampling method. A researcher made questionnaire was developed and after measuring its validity and reliability, distributed among the sample in person. Data were analyzed by using descriptive and inferential statistics and SPSS software. The results show that the students use from the electronic, printed and humanities resources respectively for fulfilling information needs and updating information. Students believe that information and communication technologies have reduced their visits to libraries. Students seek help from librarians primarily to locate books and other documents and to search for information at the first stage. Students encounter a range of problems and barriers in their information-seeking process that the most important are the Lack of resources, Expensive resources and the scattered information. Despite of the effects of new technologies on students’ presence in academic libraries, all types of information resources are still consulted by them.Various purposes for of information acquisition determines the type of information source, and students identify and use the information resources according to their information needs.

The purpose of this study was to survey the degree of mobile and Internet dependence with social alienation of students of Azad University of Gonabad. Regarding the method of data collection, it is a survey type and in terms of purpose and in terms of research method, correlation. The statistical population of the study consisted of all undergraduate students of Gonabad Islamic Azad University, which were active in the university during the period of 2018. The student population were 700 people that 250 student were randomly selected as the samples by random sampling by Cochran formula. Data were collected through Social Alienation Questionnaire and Mobile and Internet Affiliation Questionnaire. The validity of the questionnaire was determined by content validity method and the reliability of the questionnaire was calculated using Cronbach's alpha test for social alienation questionnaire equal to 0.81 and dependence on mobile and Internet was 0.88. Subsequently, using spss software in the descriptive part of the study, the descriptive and inferential data obtained from the statistical sample were analyzed using Pearson correlation coefficient and regression and t-test independent variables. The results of the research showed that there is a relationship between the degree of Internet and mobile affiliation with social alienation among university students. Also, there is a relationship between the degree of Internet and mobile affiliation with the amount of feeling powerless, anomalous, senseless, social isolation, hatred there is a cultural and self-hatred relationship among students.

Cloud computing is a computational model that provides software and web-based computing resources when requested by users. Cloud computing gives consumers' access to software in addition to cost savings. Accessibility, management, and exploitation of resources are the other virtues of virtualization. In this article, cloud computing standards are discussed, and at the end of the map, we provide a way to deploy cloud computing in libraries and information centers. Cloud computing is a computational model that provides software and web-based computing resources when requested by users. Cloud computing gives consumers' access to software in addition to cost savings. Accessibility, management, and exploitation of resources are the other virtues of virtualization. In this article, cloud computing standards are discussed, and at the end of the map, we provide a way to deploy cloud computing in libraries and information centers. Cloud computing is a computational model that provides software and web-based computing resources when requested by users. Cloud computing gives consumers' access to software in addition to cost savings. Accessibility, management, and exploitation of resources are the other virtues of virtualization. In this article, cloud computing standards are discussed, and at the end of the map, we provide a way to deploy cloud computing in libraries and information centers.