Time filter

Source Type

Kavoosi V.,Shiraz University of Technology | Dehghani M.J.,Shiraz University of Technology | Dehghani M.J.,Regional Information Center for Science and Technology | Javidan R.,Shiraz University of Technology
IET Radar, Sonar and Navigation | Year: 2016

Three-dimensional (3D) localisation of a single source in the near-field using one-pair sensor (a velocity-sensor triad and a pressure sensor) is considered. Recently, a new work has considered this problem and a method is developed with assumption that source target is closer to velocity-sensor triad than the pressure sensor. Since a prior knowledge of the target direction is not available in real situations, this algorithm cannot be applicable. In this study, a new geometry is proposed by adding another pressure sensor to the previous geometry to reduce its fundamental requirement of a known prior source direction. Then, a novel algorithm is proposed in which the velocity-sensor triad with only one of two pressure sensors is used for target localisation. By mathematical tractability of the proposed method, a selection rule for using suitable pair of sensor nodes is developed to hold the best estimation of the source location. It is shown that the proposed method not only has a solution in all target situations but also has better source estimation in comparison with the existing one. The simulation results on prototype data demonstrate the effectiveness of the proposed method in terms of existence and the accuracy of estimated target range. © The Institution of Engineering and Technology 2016.

Gazni A.,Regional Information Center for Science and Technology | Lariviere V.,University of Montréal | Lariviere V.,University of Quebec at Montréal | Didegah F.,University of Turku
Scientometrics | Year: 2016

The effect of collaborators on institutions scientific impact was examined for 81 institutions with different degrees of impact and collaboration. Not only collaborators including both core and peripheral collaborators cite each other more than non-collaborators, but also the first group cites each other faster than the second group even when self-citations were ignored. Although high impact institutions and more collaborative institutions receive more citations from their collaborators, it seems that the number of these citations increases only up to a certain point. In this regard, for example, there is a slight difference between top and middle collaborative institutions; however, only a small fraction of collaborators do not cite back the papers of these two groups of institutions. The benefit of collaboration varies based on the type of collaborators, institutions, papers, citers and the publication year of cited documents. For example, the effect of collaboration decreases as the institutions level of impact increases. Hence, collaborating more does not directly imply obtaining higher impact. © 2016 Akadémiai Kiadó, Budapest, Hungary

Gazni A.,Regional Information Center for Science and Technology | Didegah F.,University of Turku
Scientometrics | Year: 2016

Author bibliographic coupling (ABC) is extended from the bibliographic coupling concept and holds the view that two authors with more common references are more related and have more similar research interests. This study aims to examine the association between author bibliographic coupling strength and citation exchange in eighteen subject areas. The results show that there is no significant difference in the associations found across the subject areas. The correlation is positive and significant between the two factors in all subject areas, although it is stronger in some subject areas, such as Biomedical Engineering, than in others. For a closer investigation of the association between bibliographic coupling strength and citations exchanged between pairs of authors and also of ABC networks, a sample of highly cited authors in one of the subfields of Information Science & Library Science, imetrics, was taken into account. The correlation is also highly significant among imetricians. This finding confirms Merton’s norm of universalism versus constructivists’ particularism. The investigation of thirty highly cited imetricians shows that Thelwall, M is in strong bibliographic coupling and citation relationships with the majority of the authors in the network. He and Bar-Ilan have the strongest ABC and citation relationships in the network. Rousseau, R, Glanzel, W., Bornmann, L, Bar-Ilan, J, and Leydesdorff, L are also in strong ABC relationships with each other as well as other authors in the network. © 2016 Akadémiai Kiadó, Budapest, Hungary

Ghane M.A.,Regional Information Center for Science and Technology | Rahimi F.,Islamic World Science Citation Center
Information Sciences and Technology | Year: 2011

This study investigated six engineering scholarly journals and focused on scientific collaboration pattern, coefficient collaboration, Iranian international collaboration, and citation analysis. Findings showed that Iranian researchers authored 75.4% of articles themselves and 24.6% of articles with contribution of researchers from 25 countries worldwide. 367 articles that contributed by 1052 authors were studied. On average three researchers collaborated per article. Out of 1052 contributors, 814 affiliated to Iranian universities and 238 writers belonged to other countries. The results showed Indian researchers were more active than others were. Ranking universities in terms of numbers of articles showed that Iran University of Science and Technology obtained the first place. Coefficient collaboration disclosed the fact that there was a high tendency towards international collaboration e.g. the coefficient collaboration of Iranian Journal of Biotechnology was 0.668. In general, the findings would be helpful for journal's editorial boards in engineering fields to improve their policies.

Abam Z.,Alzahra University | Arastoopoor S.,Regional Information Center for Science and Technology
Iranian Journal of Information Processing Management | Year: 2015

OPACs are regarded as one of the most important intermediaries between library users and their collections. Through them one can find, identify and access desired information resources. A while ago, the very nature of OPACs made holdings of libraries and information centers available throughout the world but the real interaction between users and the collection was far beyond reach. Now through new technologies such as Web 2.0, Library 2.0 and OPAC 2.0, a higher level of user interaction is possible. The first part of this paper identified a set of OPAC 2.0 elements. A checklist was prepared based on these elements, then using it, 7 different OPAC software were assessed. Among the studied OPACs, "Sana" was identified as the most successful OPAC in both searching and social facilities. Regarding these social facilities, "ParsAzarakhsh" and "Parvan" were in a rather good state. Moreover, "Oracle", "Parvan" and "Payam" were in a fairly poor state for the searching facilities, and "Simorgh" functionality was not acceptable when social facilities were considered. The overall score of all these OPACs was higher in searching than social facilities. © 2015, Iranian Research Institute for Scientific Information and Documentation. All rights reserved.

Mehrad J.,Regional Information Center for Science and Technology | Arastoopoor S.,Regional Information Center for Science and Technology
Acta Informatica Medica | Year: 2012

Introduction: Citation analysis is currently one of the most widely used metrics for analyzing the scientific contribution in different fields. The Islamic World Science Citation Center (ISC) aims at promoting technical cooperation among Muslim scientists and their respected centers based on these theories. It also facilitates the accessibility of knowledge and research contribution among them. This paper aims at revealing some of the outmost features of ISC databases, in order to give a fairly clear view of what it is and what are its products. The paper consists of three major parts. After an introduction about the Islamic World Science Citation Center, the paper deals with major tools and products of ISC. In the third part ISCs' journal Submission system is presented as an automatic means, by which users can upload journals' papers into the respected databases. Conclusion: Some complementary remarks have been made regarding the current state of ISC and its future plans. © AVICENA 2012.

Arastoopoor S.,Regional Information Center for Science and Technology | Fattahi R.,Ferdowsi University of Mashhad
Advances in Knowledge Organization | Year: 2014

Purpose: A higher level of retrieval relevance along with pertinence is what information systems are required to provide if they are to gain more user satisfaction. Although in almost every IR system, general and non-topical terms are not considered to play a major role in indexing, the underlying assumption of current study stems from the fact that these terms could be effective in better searching by end-users. Thus this paper aims at proposing a new approach in this regard using a small thesaurus of general and non-topical terms which can be used along with queries (i.e., topical keywords). This would help making users' queries closer to natural language. Method: In the first phase of this study, a set of 669 non-topical terms, which were identified through a previous study, was assumed as the test bed. Based on the main goal of the present paper, the list was analyzed and divided into major categories. As for the second phase, a preferred label representing each category was selected and assigned based on its "use warrant"; and to this end Google Trends was applied for determining the most-frequent general and non-topical terms among users' web searches. At last the developed thesaurus was tested in searching and the retrieved results were evaluated in terms of relevance and pertinence. Results: The findings of this study show that, although there is rather a diverse range of general and nontopical terms appearing before or after topical keywords in Web documents, users are still using no or only a small fracture of them in their search queries. The findings also show that these terms would be of great assistance in providing more relevant results and a meaningful display of the results. This paper then proposes a conceptual model for applying such a thesaurus in searching the Web.

Dehdarizadeh A.,Regional Information Center for Science and Technology
Information Sciences and Technology | Year: 2011

The main purpose of the present research is to investigate the obstacles of Information Technology application in public libraries in Shiraz. Research methodology is a descriptive survey. The number of Research population is 103 persons who are the staff of public libraries of Shiraz. Data collecting tools is a questionnaire set by SPSS. Inferential statistical tests such as Pierson test, T-Test and Annova test have been used to analyse the collected data. Findings shows that there is no meaningful difference between managers and experts attitudes toward the use of advantages of IT applications in public libraries and between their attitudes toward the managerial, technical, economic and socio-cultural obstacles of effective using of Information Technology.

Khosrowjerdi M.,Regional Information Center for Science and Technology
Library Hi Tech | Year: 2011

Purpose: This paper aims to design a viable model for a scholarly communication system. Design/methodology/approach: Stafford Beer's viable system model (VSM) is an exceptionally insightful analysis tool which has been applied in different fields. This paper illustrates the usefulness of Beer's model as a tool for anticipating, planning, and implementing large-scale development in the scientific communication domain. Following the Beer thinking of organisational structure and the usefulness of VSM in knowledge management stated by some researchers, a viable scientific communication model (VSCM) was designed. Findings: The paper has developed a viable scientific communication model which relates personal knowledge about a scientific communication system with Beer's viability thinking. Research limitations/implications: The designed model is fairly conceptual. Originality/value: Compared with the earlier models, it seems that the suggested model is not dependent on context, time, and scale. This model may be used in many contexts because the functions and the operations of scholarly communication are unique. This model is viable and can update itself over a period of years. New elements of scholarly communication and the Web 2.0 platforms have also been incorporated into the model. © Emerald Group Publishing Limited.

Arastoopoor S.,Regional Information Center for Science and Technology | Fattahi R.,Ferdowsi University of Mashhad
Advances in Knowledge Organization | Year: 2012

It is widely accepted that subject indexing of an image is based on a two-dimensional approach. The first is the ofness and the second focuses on aboutness of the image. Assigning a suitable set of subject tags based on these two groups depends, to a great deal, on users' perception of the image. This study aims at analyzing users' perception of aboutness and ofness of images. 25 in-depth semi-structured interviews were conducted in two phases. In the first phase a collection of 10 widely known photographs were given to the interviewees and they were asked to assign subject tags (as many as they wanted) to each image. In the second phase some facts regarding each image were given to him / her to assign further tags (again as many as they wanted) or even modify their previous tags. The results show that the interviewees do focus both on ofness and aboutness in subject tagging; but it seems that they emphasize more on aboutness in describing images. On the other hand, as soon as the interviewees were able to distinguish the iconographical ofness, they could speak of iconographical and iconological aboutness. The results also show that subject indexers must focus on the iconographical level, especially regarding those tags which represent the ofness at this level.

Loading Regional Information Center for Science and Technology collaborators
Loading Regional Information Center for Science and Technology collaborators