فهرست مطالب dr. mohammad hossein dayani

Propose: The stratification of Iranian knowledge and information science academic member in viewpoint of presence and effectiveness and scientific and professional performance are the main aims of this article.
In this applied research, descriptive survey and webometrics methods were implemented. The research population included the Iranian knowledge and information science academic members (Assistant Prof., Associate Prof and Full Prof). To gather data about presence and effectiveness of stratification Google Scholar and Iran Science Citation Index (PSCI) have been used. Besides, the researcher made questionnaire has been applied for the scientific and professional stratification.
Findings: The results showed that graduation from foreign universities, skillful in English language, collaborated publishing, scientific collaboration with international scientists, membership in research groups, and occupation in reputable departments running graduate levels are among some of the main important causes for the presence of the members of this research population in the central (core) stratification.

This study aimed to identify Iran’s scientific growth model in the field of science during 1980 to 2010 (three decades).
This study was an applied one which was conducted by using trend studies method and time series analysis. The research population included Iran's all scientific productions which were indexed in Science Citation Index (SCI) during 1980 to2010, (90,000 Records).
Findings: Based on time series analysis and by using R statistical software, Iran's scientific growth models were identified and their growth graphs were analyzed. The dominant scientific growth models for Iran were logistic. The annual growth rate of Iran's scientific production during these years was not stable. Iran's annual scientific production rate in the first, second, and third decades were negative, positive, and rather low, and positive and very high, respectively. Iran's average annual scientific production rates were 15%. Some scientific growth models and their implications for the scientific growth at the national and international levels as well as the factors affecting = the growth trends are presented. Price's hypothesis stating that the exponential growth of science constantly amounts to two times per 15 years was confirmed in the cases of Iran's scientific production; however, his proposed constant growth rate is ambiguous and needs to be revised.

Web presence is one of the areas of research in the field of webometrics. Due to lack of precise information on the presence of the Knowledge and Information Science (KIS) faculty members in Iran، this study aims to address this problem. It studies the level and quality of the presence of the LIS faculty and its relation to their professional effectiveness، focusing on their academic and professional performance. This study is an applied research، taking two approaches: descriptive survey and webometrics. The study participants are the KIS faculty members in Iran who hold a PhD degree، have senior lecturer (assistant professor) position and positions above that، and have scientific publications and web citations. A checklist was used to collect the webrelated data on their presence، and a questionnaire was designed to collect the data on their academic and professional activities. Three databases were used to collect the web-related data، namely Google، Google Scholar and the Iran Science Citation Index. The data was analyzed using statistical analysis and tests of descriptive and interpretive types. From the web presence perspective، the findings revealed that besides experienced academics، younger academic members have remarkable web presence. The findings showed that there is a meaningful relationship between the level of presence of the studyparticipants and their publications. KIS academics of Ferdowsi University of Mshhad and Shahid Chamran University of Ahvaz have gained highest positions according to publication web presence in Google. Also، scientific databases، self citations and university websites have got the first to third ranks in order to publication web presence themes. In addition، results showed us publishing Farsi and English articles in credible refereed journals is the most important theme in scientific and professional performance.

Knowledge organization systems are to help effective retrieval. Therefore, information storage and retrieval tools such as Subject Headings must keep abreast with knowledge improvement. This study has compared the concept network of Persian Subject Headings with Library of Congress Subject Headings, Sears Subject Headings and LISA concept network to see to what extent the it is different from other tools and how the concept relations is treated. The findings indicated the number of concept-words related to LIS in low in Persian Subject Headings and the relationships hasn’t enough been considered.

Researchers have to conduct multivariate investigation in most of LIS studies, especially attitudinal and behavioral related fields. Most of these variables are unobservable and immeasurable (known as conceptual constructs or latent variables). Researchers estimate these latent variables via observable factors or indices. Most of them aim to investigate causal relationship between latent variables through observable variables. Conventionally and typically, statistical methods like variance, regression, path, and factor analysis are used in such studies. SEM is the last statistical tool which not only prepares the previous kinds of analysis, but also provides estimate errors in both observable and unobservable variables, theory/model modification, and choosing the best between compared different models. SEM is used both in Confirmatory and Exploratory approaches, in social sciences to test theoretical models. Through analyzing 178 research articles we aimed to: 1) Introduce SEM to LIS researchers; and 2) Clarify SEM use state of the art in LIS studies and draw a close look of fields, topics, variables and theories which have been studied and analyzed via SEM method.

The purpose of this study is to determine the delay rate of scientific Persian language journals, and to identify the reasons and provide practical recommendations for timely publication of such journals. A survey and descriptive method was used. Data were collected from the journal section of Astan Quds Razavi Library, Magiran Database and Database of Scientific Journal Publication of Ministry of Science, Research and Technology. Findings showed that 291 titles of 422 titles (69%) are not published on due time. %3.21 of the titles had only 1 issue delay, and %27 of the titles had more than three issues delay. The longer delay is seen in titles published in the fields of agriculture, humanities, basic science and the lowest delay was observed in the fields of medical science, engineering and art. The most important causes of delay are discussed and strategies for improving the situations are described.

The aim of this study is to investigate the quality of citations used in articles published in three Persian language library and information science journals. Two approaches were used: (1) the part of articles in which citations are used. It was found that the literature review part included the most citations. (2) The type of citations and its impact on the subject being discussed. It was found that the most citations are those which provide historical and background information. The pattern of citations in three journals was different.

The aim of this research is to evaluate the rate and pattern of Internet use among Kabul University students and factors affecting the Internet use and challenges to and problems of Internet access. 325 Bachelor students of Kabul University were selected as samples in this research. Findings show that 72 % of students do not use Internet. Among the users, 65% use Internet to browse specific and scientific information through search engines, 59% of students use Internet because they cannot find what they need in other sources and 58% use Internet to do their assignments. Results also show there is a significant difference between the amount of use and students’ Internet use skills and their experience. However, such significant difference is not seen between the amount of use and having personal computer, the location where they live and the extent of satisfaction and sex. Lack of access to Internet is the main reason for students not to use it and lack of acquaintance with Internet skills, lack of permanent electricity, not having personal computer, high expense of access, failure of Telecommunication wires and slow Internet speed, are the factors mentioned by non-users as the reasons for not using the Internet.

This content analysis research analyzes and compares concept network of Persian Subject Headings with Persian library and information science literature. Statistical population consisted of 392 books and 782 papers published during 2002-2006. Through systematic sampling, 99 books and 197 papers were selected. The findings indicates that the concept network of books and papers are different. Moreover, there is a significant difference between the concept network of literature with that of Persian Subject Headings.Therefore the structure of Persian Subject Headings concept network have to be reviewed and modified.