Diese Datenbank enthält über 40.000 Dokumente zu Themen aus den Bereichen Formalerschließung – Inhaltserschließung – Information Retrieval.
© 2015 W. Gödert, TH Köln, Institut für Informationswissenschaft / Powered by litecat, BIS Oldenburg (Stand: 23. Dezember 2017)
1Tavakolizadeh-Ravari, M.: Analysis of the long term dynamics in thesaurus developments and its consequences.
In: http://edoc.hu-berlin.de/docviews/abstract.php?id=28144. Berlin : Humboldt-Universität zu Berlin / Institut für Bibliotheks- und Informationswissenschaft, 20017. 128 S.
Abstract: Die Arbeit analysiert die dynamische Entwicklung und den Gebrauch von Thesaurusbegriffen. Zusätzlich konzentriert sie sich auf die Faktoren, die die Zahl von Indexbegriffen pro Dokument oder Zeitschrift beeinflussen. Als Untersuchungsobjekt dienten der MeSH und die entsprechende Datenbank "MEDLINE". Die wichtigsten Konsequenzen sind: 1. Der MeSH-Thesaurus hat sich durch drei unterschiedliche Phasen jeweils logarithmisch entwickelt. Solch einen Thesaurus sollte folgenden Gleichung folgen: "T = 3.076,6 Ln (d) - 22.695 + 0,0039d" (T = Begriffe, Ln = natürlicher Logarithmus und d = Dokumente). Um solch einen Thesaurus zu konstruieren, muss man demnach etwa 1.600 Dokumente von unterschiedlichen Themen des Bereiches des Thesaurus haben. Die dynamische Entwicklung von Thesauri wie MeSH erfordert die Einführung eines neuen Begriffs pro Indexierung von 256 neuen Dokumenten. 2. Die Verteilung der Thesaurusbegriffe erbrachte drei Kategorien: starke, normale und selten verwendete Headings. Die letzte Gruppe ist in einer Testphase, während in der ersten und zweiten Kategorie die neu hinzukommenden Deskriptoren zu einem Thesauruswachstum führen. 3. Es gibt ein logarithmisches Verhältnis zwischen der Zahl von Index-Begriffen pro Aufsatz und dessen Seitenzahl für die Artikeln zwischen einer und einundzwanzig Seiten. 4. Zeitschriftenaufsätze, die in MEDLINE mit Abstracts erscheinen erhalten fast zwei Deskriptoren mehr. 5. Die Findablity der nicht-englisch sprachigen Dokumente in MEDLINE ist geringer als die englische Dokumente. 6. Aufsätze der Zeitschriften mit einem Impact Factor 0 bis fünfzehn erhalten nicht mehr Indexbegriffe als die der anderen von MEDINE erfassten Zeitschriften. 7. In einem Indexierungssystem haben unterschiedliche Zeitschriften mehr oder weniger Gewicht in ihrem Findability. Die Verteilung der Indexbegriffe pro Seite hat gezeigt, dass es bei MEDLINE drei Kategorien der Publikationen gibt. Außerdem gibt es wenige stark bevorzugten Zeitschriften."
Inhalt: Vgl.: https://www.ibi.hu-berlin.de/de/archiv/forschung/prom_habil/dissertationen/Tavakolizadeh-Ravari2007. Vgl. auch: http://mravari.blogfa.com/post-20.aspxgl.
Anmerkung: Dissertation, Humboldt-Universität zu Berlin - Institut für Bibliotheks- und Informationswissenschaft.
Themenfeld: Konzeption und Anwendung des Prinzips Thesaurus ; Informetrie ; Automatisches Indexieren
Objekt: MEDLINE ; MeSH
2Luo, P. ; Chen, K. ; Wu, C. ; Li, Y.: Exploring the social influence of multichannel access in an online health community.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.98-109.
Abstract: Social influence has a great impact on human behavior, which has been widely investigated in various research fields. Even so, it has rarely been investigated in the online health community. In this paper, we focus on the multichannel access in online health communities, defining social influence as the average degree of multichannel access to a physician's colleagues. Based on the multinomial logistic regression model, we examined the direct effects of social influence and patients' rating to multichannel access. In addition, we explored the moderating effect of social influence on the relationship between patients' rating and multichannel access in online health communities. The results of the experiment and robustness testing support the propositions that social influence and patients' rating significantly and positively affect multichannel access in an online health community. The moderating effect of social influence is negative and significantly influences the accessible channels provided by the focal physician. This research contributes to the literature concerning online health communities, social influence, and multichannel access; it also has practical implications.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23928/full.
3Haley, M.R. ; McGee, M.K.: ¬A parametric "parent metric" approach for comparing maximum-normalized journal ranking metrics.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.172-176.
Abstract: This article proposes a parametric approach for facilitating inter-metric and inter-field comparisons of citation-based journal ranking metrics. The mechanism is simple to apply and adjusts for metric magnitude differentials and distributional asymmetries in the rank-score curves. The method is demonstrated using h-index, AWCR-index, g-index, and e-index data from journals in Accounting, Economics, and Finance.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23908/full.
4Silvello, G.: Theory and practice of data citation.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.6-20.
Abstract: Citations are the cornerstone of knowledge propagation and the primary means of assessing the quality of research, as well as directing investments in science. Science is increasingly becoming "data-intensive," where large volumes of data are collected and analyzed to discover complex patterns through simulations and experiments, and most scientific reference works have been replaced by online curated data sets. Yet, given a data set, there is no quantitative, consistent, and established way of knowing how it has been used over time, who contributed to its curation, what results have been yielded, or what value it has. The development of a theory and practice of data citation is fundamental for considering data as first-class research objects with the same relevance and centrality of traditional scientific products. Many works in recent years have discussed data citation from different viewpoints: illustrating why data citation is needed, defining the principles and outlining recommendations for data citation systems, and providing computational methods for addressing specific issues of data citation. The current panorama is many-faceted and an overall view that brings together diverse aspects of this topic is still missing. Therefore, this paper aims to describe the lay of the land for data citation, both from the theoretical (the why and what) and the practical (the how) angle.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23917/full.
5Bella, A. La ; Fronzetti Colladon, A. ; Battistoni, E. ; Castellan, S. ; Francucci, M.: Assessing perceived organizational leadership styles through twitter text mining.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.21-31.
Abstract: We propose a text classification tool based on support vector machines for the assessment of organizational leadership styles, as appearing to Twitter users. We collected Twitter data over 51 days, related to the first 30 Italian organizations in the 2015 ranking of Forbes Global 2000-out of which we selected the five with the most relevant volumes of tweets. We analyzed the communication of the company leaders, together with the dialogue among the stakeholders of each company, to understand the association with perceived leadership styles and dimensions. To assess leadership profiles, we referred to the 10-factor model developed by Barchiesi and La Bella in 2007. We maintain the distinctiveness of the approach we propose, as it allows a rapid assessment of the perceived leadership capabilities of an enterprise, as they emerge from its social media interactions. It can also be used to show how companies respond and manage their communication when specific events take place, and to assess their stakeholder's reactions.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23918/full.
Themenfeld: Data Mining
6Zhao, M. ; Yan, E. ; Li, K.: Data set mentions and citations : a content analysis of full-text publications.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.32-46.
Abstract: This study provides evidence of data set mentions and citations in multiple disciplines based on a content analysis of 600 publications in PLoS One. We find that data set mentions and citations varied greatly among disciplines in terms of how data sets were collected, referenced, and curated. While a majority of articles provided free access to data, formal ways of data attribution such as DOIs and data citations were used in a limited number of articles. In addition, data reuse took place in less than 30% of the publications that used data, suggesting that researchers are still inclined to create and use their own data sets, rather than reusing previously curated data. This paper provides a comprehensive understanding of how data sets are used in science and helps institutions and publishers make useful data policies.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23919/full.
Objekt: PLoS One
7Lim, S. ; Woo, J.R. ; Lee, J. ; Huh, S.-Y.: Consumer valuation of personal information in the age of big data.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.60-71.
Abstract: In a big data environment, there are growing concerns about the violation of consumer rights regarding information privacy. To induce rational regulations for protecting personal information, it is necessary to separately estimate consumers' values related to different types of personal information. In this article, discrete choice experiments using hypothetical information leakage situations given certain compensation amounts and discrete choice models were used to quantitatively analyze the value of personal information. The results indicate that consumers generally place high value on information that could cause immediate and actual damage from the leakage after identification, such as basic personal information and purchase list and payment information. Consumers value location information and personal medical information differently based on their perceived importance of privacy and their prior experience with personal information leakage. We suggest that the level of regulation should differ according to the type of personal information based on the consumers' valuation. This article contributes to a better understanding of a quantitative approach to pricing personal information.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23915/full.
8Reyes Ayala, B. ; Knudson, R. ; Chen, J. ; Cao, G. ; Wang, X.: Metadata records machine translation combining multi-engine outputs with limited parallel data.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.47-59.
Abstract: One way to facilitate Multilingual Information Access (MLIA) for digital libraries is to generate multilingual metadata records by applying Machine Translation (MT) techniques. Current online MT services are available and affordable, but are not always effective for creating multilingual metadata records. In this study, we implemented 3 different MT strategies and evaluated their performance when translating English metadata records to Chinese and Spanish. These strategies included combining MT results from 3 online MT systems (Google, Bing, and Yahoo!) with and without additional linguistic resources, such as manually-generated parallel corpora, and metadata records in the two target languages obtained from international partners. The open-source statistical MT platform Moses was applied to design and implement the three translation strategies. Human evaluation of the MT results using adequacy and fluency demonstrated that two of the strategies produced higher quality translations than individual online MT systems for both languages. Especially, adding small, manually-generated parallel corpora of metadata records significantly improved translation performance. Our study suggested an effective and efficient MT approach for providing multilingual services for digital collections.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23925/full.
9Zhang, C. ; Bu, Y. ; Ding, Y. ; Xu, J.: Understanding scientific collaboration : homophily, transitivity, and preferential attachment.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.72-86.
Abstract: Scientific collaboration is essential in solving problems and breeding innovation. Coauthor network analysis has been utilized to study scholars' collaborations for a long time, but these studies have not simultaneously taken different collaboration features into consideration. In this paper, we present a systematic approach to analyze the differences in possibilities that two authors will cooperate as seen from the effects of homophily, transitivity, and preferential attachment. Exponential random graph models (ERGMs) are applied in this research. We find that different types of publications one author has written play diverse roles in his/her collaborations. An author's tendency to form new collaborations with her/his coauthors' collaborators is strong, where the more coauthors one author had before, the more new collaborators he/she will attract. We demonstrate that considering the authors' attributes and homophily effects as well as the transitivity and preferential attachment effects of the coauthorship network in which they are embedded helps us gain a comprehensive understanding of scientific collaboration.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23916/full.
10Bu, Y. ; Ding, Y. ; Xu, J. ; Liang, X. ; Gao, G. ; Zhao, Y.: Understanding success through the diversity of collaborators and the milestone of career.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.87-97.
Abstract: Scientific collaboration is vital to many fields, and it is common to see scholars seek out experienced researchers or experts in a domain with whom they can share knowledge, experience, and resources. To explore the diversity of research collaborations, this article performs a temporal analysis on the scientific careers of researchers in the field of computer science. Specifically, we analyze collaborators using 2 indicators: the research topic diversity, measured by the Author-Conference-Topic model and cosine, and the impact diversity, measured by the normalized standard deviation of h-indices. We find that the collaborators of high-impact researchers tend to study diverse research topics and have diverse h-indices. Moreover, by setting PhD graduation as an important milestone in researchers' careers, we examine several indicators related to scientific collaboration and their effects on a career. The results show that collaborating with authoritative authors plays an important role prior to a researcher's PhD graduation, but working with non-authoritative authors carries more weight after PhD graduation.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23911/full.
11Mayernik, M.S. ; Acker, A.: Tracing the traces : the critical role of metadata within networked communications.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.177-180.
Abstract: The information sciences have traditionally been at the center of metadata-focused research. The US National Security Agency (NSA) intelligence documents revealed by Edward Snowden in June of 2013 brought the term "metadata" into the public consciousness. Surprisingly little discussion in the information sciences has since occurred on the nature and importance of metadata within networked communication systems. The collection of digital metadata impacts the ways that people experience social and technical communication. Without such metadata, networked communication cannot exist. The NSA leaks, and numerous recent hacks of corporate and government communications, point to metadata as objects of new scholarly inquiry. If we are to engage in meaningful discussions about our digital traces, or make informed decisions about new policies and technologies, it is essential to develop theoretical and empirical frameworks that account for digital metadata. This opinion paper presents 5 key sociotechnical characteristics of metadata within digital networks that would benefit from stronger engagement by the information sciences.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23927/full.
12Lu, T. ; Xu, Y.(C.) ; Wallace, S.: Internet usage and patient's trust in physician during diagnoses : a knowledge power perspective.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.110-120.
Abstract: Does patients' Internet search of disease information affect their trust in physicians during diagnosis? This study proposes a research model from a knowledge power perspective, that is, Internet search affects patients' perception of their knowledge level. Our empirical study of more than 400 subjects suggests that for patients who searched online for disease information, the inconsistency between their self-diagnosis expectations and their physician's diagnosis reduces their trust in their physician. The effect is stronger for those who spent more time on Internet search. Patients with chronic conditions are less affected by the inconsistency, as are patients of physicians with a higher professional status. This study also found that physicians' interaction quality in the diagnosis process-how well they communicate with their patient-still plays a dominant role in gaining patient's trust. This finding suggests that even in the high-tech age, high-touch remains an important factor to physician-patient trust.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23920/full.
13Maflahi, N. ; Thelwall, M.: How quickly do publications get read? : the evolution of mendeley reader counts for new articles.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.158-167.
Abstract: Within science, citation counts are widely used to estimate research impact but publication delays mean that they are not useful for recent research. This gap can be filled by Mendeley reader counts, which are valuable early impact indicators for academic articles because they appear before citations and correlate strongly with them. Nevertheless, it is not known how Mendeley readership counts accumulate within the year of publication, and so it is unclear how soon they can be used. In response, this paper reports a longitudinal weekly study of the Mendeley readers of articles in 6 library and information science journals from 2016. The results suggest that Mendeley readers accrue from when articles are first available online and continue to steadily build. For journals with large publication delays, articles can already have substantial numbers of readers by their publication date. Thus, Mendeley reader counts may even be useful as early impact indicators for articles before they have been officially published in a journal issue. If field normalized indicators are needed, then these can be generated when journal issues are published using the online first date.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23909/full.
Themenfeld: Informetrie ; Elektronisches Publizieren
14Lu, K. ; Mao, J. ; Li, G.: Toward effective automated weighted subject indexing : a comparison of different approaches in different environments.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.121-133.
Abstract: Subject indexing plays an important role in supporting subject access to information resources. Current subject indexing systems do not make adequate distinctions on the importance of assigned subject descriptors. Assigning numeric weights to subject descriptors to distinguish their importance to the documents can strengthen the role of subject metadata. Automated methods are more cost-effective. This study compares different automated weighting methods in different environments. Two evaluation methods were used to assess the performance. Experiments on three datasets in the biomedical domain suggest the performance of different weighting methods depends on whether it is an abstract or full text environment. Mutual information with bag-of-words representation shows the best average performance in the full text environment, while cosine with bag-of-words representation is the best in an abstract environment. The cosine measure has relatively consistent and robust performance. A direct weighting method, IDF (Inverse Document Frequency), can produce quick and reasonable estimates of the weights. Bag-of-words representation generally outperforms the concept-based representation. Further improvement in performance can be obtained by using the learning-to-rank method to integrate different weighting methods. This study follows up Lu and Mao (Journal of the Association for Information Science and Technology, 66, 1776-1784, 2015), in which an automated weighted subject indexing method was proposed and validated. The findings from this study contribute to more effective weighted subject indexing.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23912/full.
Themenfeld: Automatisches Indexieren ; Indexierungsstudien
15Sköld, O.: Understanding the "expanded notion" of videogames as archival objects : a review of priorities, methods, and conceptions.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.134-145.
Abstract: This paper aims to show how videogames are construed as archival objects in the videogame-preservation literature by investigating drivers and motivations, selection of material, and methods of preservation. The review focuses on the expanded notion of videogames ("the EN"), a concept this paper introduces to collectively refer to the cultural and social aspects of videogames-for example, game culture, experiences, play, and community life and activity. The study's research aims are pursued on the basis of a critical systematic literature review of 42 publications originating from academic research and videogame-archiving projects. The study's main finding is that the archiving literature construes the EN of videogames in three principal ways: i) as an essential part of the videogame as an archival object; ii) as a useful resource in archiving videogames, able to provide documentation of game culture and social context; and iii) as a useful resource in inquiries focused on the current state and recent history of society and culture from a sociotechnical viewpoint. The study suggests videogame community dynamics, videogame ontology, the development of archival theory, and videogame-archive studies as rewarding directions for further research.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23875/full.
Behandelte Form: Spiele
16Zuccala, A. ; Breum, M. ; Bruun, K. ; Wunsch, B.T.: Metric assessments of books as families of works.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.146-157.
Abstract: We describe the intellectual and physical properties of books as manifestations, expressions, and works and assess the current indexing and metadata structure of monographs in the Book Citation Index (BKCI). Our focus is on the interrelationship of these properties in light of the Functional Requirements for Bibliographic Records (FRBR). Data pertaining to monographs were collected from the Danish PURE repository system as well as the BKCI (2005-2015) via their International Standard Book Numbers (ISBNs). Each ISBN was then matched to the same ISBN and family-related ISBNs cataloged in two additional databases: OCLC-WorldCat and Goodreads. With the retrieval of all family-related ISBNs, we were able to determine the number of monograph expressions present in the BKCI and their collective relationship to one work. Our results show that the majority of missing expressions from the BKCI are emblematic (i.e., first editions of monographs) and that both the indexing and metadata structure of this commercial database could significantly improve with the introduction of distinct expression IDs (i.e., for every distinct edition) and unifying work-related IDs. This improved metadata structure would support the collection of more accurate publication and citation counts for monographs and has implications for developing new indicators based on bibliographic levels.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23921/full.
Objekt: FRBR ; Book Citation Index
17Jones, L.M. ; Wright, K.D. ; Wallace, M.K. ; Veinot, T.: "Take an opportunity whenever you get it" : information sharing among African-American women with hypertension.
In: Journal of the Association for Information Science and Technology. 69(2018) no.1, S.168-171.
Abstract: Nearly half of African-American women have hypertension, which increases their risk for cardiovascular disease and stroke. A plethora of consumer health information products and services exist to inform people with hypertension and to promote self-management among them. Promotion of information sharing by African-American women represents a promising, culturally applicable strategy for consumer health information services focused on hypertension self-management. Yet how African-American women share hypertension information with others is unclear. The purpose of this qualitative, descriptive study was to examine practices of information sharing in African-American women with hypertension. Thirteen women (mean age?=?73, SD?=?9.87) participated in one of 2 focus groups held at an urban community health center. Thematic analysis revealed that the women shared information about how they self-managed their blood pressure i) with female family members and friends, ii) about ways in which they adapted self-management strategies to work for them, iii) mostly in group settings, and iv) because they wanted to prevent others from suffering and reinforce their own knowledge about hypertension self-management. New findings emerged regarding assessing "readiness" for information. Study findings will be used to inform the design of an information-sharing intervention to support self-management of hypertension in African-American women.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23923/full.
19Moskovitch, R. ; Wang, F. ; Pei, J. ; Friedman, C.: JASIST special issue on biomedical information retrieval : Editorial.
In: Journal of the Association for Information Science and Technology. 68(2017) no.11, S.2525-2528.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23972/full.
Wissenschaftsfach: Biochemie ; Medizin
20Drewer, P. ; Massion, F ; Pulitano, D: Was haben Wissensmodellierung, Wissensstrukturierung, künstliche Intelligenz und Terminologie miteinander zu tun?.
In: https://archive-ouverte.unige.ch/unige:100073/. Deutsches Institut für Terminologie : O.O., 2017. 28 S.
Abstract: Diese Publikation beschreibt die Zusammenhänge zwischen wissenshaltigen begriffsorientierten Terminologien, Ontologien, Big Data und künstliche Intelligenz.