1,720,983 research outputs found
Relevance ranking on Google
No full textPurposeThe main purpose of this study is to evaluate the effectiveness of relevance ranking on Google by comparing the system's assessment of relevance with the users' views. The research aims to find out whether the presumably objective relevance ranking of Google based on the PageRank and some other factors in fact matches users' subjective judgments of relevance.Design/methodology/approachThis research investigated the relevance ranking of Google's retrieved results using 34 searches conducted by users in real search sessions. The results pages 1‐4 (i.e. the first 40 results) were examined by the users to identify relevant documents. Based on these data the frequency of relevant documents according to the appearance order of retrieved documents in the first four results pages was calculated. The four results pages were also compared in terms of precision.FindingsIn 50 per cent and 47.06 per cent of the searches the documents ranked 5th and 1st, (i.e. from the first pages of the retrieved results) respectively, were most relevant according to the users' viewpoints. Yet even in the fourth results pages there were three documents that were judged most relevant by the users in more than 40 per cent of the searches. There were no significant differences between the precision of the four results pages except between pages 1 and 3.Practical implicationsThe results will help users of search engines, especially Google, to decide how many pages of the retrieved results to examine.Originality/valueSearch engine design will benefit from the results of this study as it experimentally evaluates the effectiveness of Google's relevance ranking.</jats:sec
Analysis of the Relationship between Motivation and Critical Thinking with Intentional Internet Search Behavior Case study: Students of Mazandaran University of Medical Sciences, Hygiene Faculty
No full textThis research aimed to investigate the relationship between critical thinking and motivation with intentional Internet search. The research sample included 196 students in bachelor degree and 28 students in master degree programs offered by Hygiene Faculty at Mazandaran University of Medical and Health Sciences. The method used in this research was based on analytical survey and the tools used in collecting data for critical thinking survey was based on California “form B” standardized by Khalili. Motivation was measured by the subscales of Motivated Strategies for Learning Questionnaire (MSLQ) which was developed by Pintrich and Garcia and Behavioral Internet Search Questionnaire developed by Wu was used for measuring intentional Internet search. Findings of this research indicated that there was no meaningful relationship between critical thinking and intentional Internet search amongst the targeted population in this research; however, the researcher theory was based on existence of a meaningful relationship between motivation and intentional Internet search approved. Measured level of critical thinking within targeted population averaged to 10/19 which was lower than standardized process that yields 15/59. This indicated that research population’s critical thinking was weak. Measured level of motivation amounts to 82/10 and this was higher than the average. This indicated that population under research possessed relatively good motivation. Measured level of intentional Internet search averages to 58/51 which was at the mean interval for this variable, therefore this skill was on par with the average level. Review of relationship between variables in the research with variables of gender demographic, educational courses, section and educational discipline indicated that there was indeed a meaningful connection between critical thinking and variables of demographic of degree level and discipline. There was a meaningful relationship between motivation and demographic variables of degree and discipline and the average of motivation factor in master degree was higher than the bachelor degree. Intentional Internet search had a meaningful connection with respect to education level and discipline.
Co-authorship networks of Iranian articles in library and information science, psychology, management and economics in ISI during 2000-2009
No full textThe objective of this research was to compare co
authorship networks of Iranian articles in Library and
Information Science (LIS),
(MNG) and Economics (ECO) in ISI during 2000
research was a bibliometric study and used network analysis
(using Pajek) for the visualization of co
Data included all articles written by at leas
and indexed in Social Science Citation Index (SSCI) for the fields
of LIS, PYSCH, MNG and ECO. Different indicators such as
collaborative index (CI), degree of collaboration (DC) and
collaboration coefficient (CC) were calculated for e
Results showed that two or three authors were the most common
number of authors per paper and authors of PYSCH tended to
have more multi-authored articles compared to the other
disciplines. LIS had the lowest rank regarding CC. MNG had the
densest and PYSCH had the sparsest co-authoship network.
Iranian authors in the field of PSYCH mostly collaborated with
USA while LIS and MNG authors tended to collaborate with UK,
and ECO authors tended to collaborate with Canadians
The Status analysis of ASFA, UNESCO and thesaurus of Sociology in terms of semantic relation, form construction, displaying controlled vocabularies and management systems
No full textThis study aims to shed light on the status of Persian thesauri of Humanities and to evaluate them in terms of four dimensions of form construction, semantic relationships, displaying controlled vocabularies, and management systems, based on the latest version of the ANSI/NISO z39.19 2005 standard. The research method utilized in this study is the analytical survey method. Systematic sampling method was used to select samples of the terms contained in the latest edition of every thesaurus in the field of Humanities except Islamic sciences thesauri. So the number of thesauri in this study was 3, and they were ASFA, UNESCO and thesaurus of Sociology. The research instrument used in this study was a check list defined in Microsoft Excel. The samples for the four dimensions were entered in the checklist and were evaluated on the basis of the relevant standards. The results of the study shows that the level of observance of semantic relations standards in ASFA, UNESCO and thesaurus of Sociology were respectively 93%,99% and 99%.The level of observance of form construction standards in ASFA, UNESCO and thesaurus of Sociology were respectively 99%, 99.5% and 96%. The level of observance of the standards in ASFA, UNESCO and thesaurus of Sociology was respectively With regard to displaying controlled vocabularies dimension were respectively 84%, 43% and 54.5% and the level of observance of management system standards in ASFA was 82% while the rate of this dimension in the remaining two thesauri was 14%. Finally, it is concluded that possessing the required expertise, familiarity with the standards of thesauri construction, utilizing appropriate models, taking the needs of the end users into consideration, reviewing and revising information storage and retrieval policies, and activation of the indexing and the reference sections of the libraries for registering the users' documents are among the major factors that if observed can lead to the construction of more effective and efficient thesauri
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Comparing the Precision of Information Retrieval of MeSH-Controlled Vocabulary Search Method and a Visual Method in the Medline Medical Database
No full textBackground: Medline is one of the most important databases in the biomedical field. One of the most important
hosts for Medline is Elton B. Stephens CO. (EBSCO), which has presented different search methods that can be
used based on the needs of the users. Visual search and MeSH-controlled search methods are among the most
common methods. The goal of this research was to compare the precision of the retrieved sources in the EBSCO
Medline base using MeSH-controlled and visual search methods. Methods: This research was a semi-empirical study. By holding training workshops, 70 students of higher education
in different educational departments of Kashan University of Medical Sciences were taught MeSH-Controlled and
visual search methods in 2012. Then, the precision of 300 searches made by these students was calculated based on
Best Precision, Useful Precision, and Objective Precision formulas and analyzed in SPSS software using the
independent sample T Test, and three precisions obtained with the three precision formulas were studied for the two
search methods.
Results: The mean precision of the visual method was greater than that of the MeSH-Controlled search for all three
types of precision, i.e. Best Precision, Useful Precision, and Objective Precision, and their mean precisions were
significantly different (P <0.001). Sixty-five percent of the researchers indicated that, although the visual method
was better than the controlled method, the control of keywords in the controlled method resulted in finding more
proper keywords for the searches. Fifty-three percent of the participants in the research also mentioned that the use
of the combination of the two methods produced better results.
Conclusion: For users, it is more appropriate to use a natural, language-based method, such as the visual method, in
the EBSCO Medline host than to use the controlled method, which requires users to use special keywords. The
potential reason for their preference was that the visual method allowed them more freedom of action
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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