Literatur zur Informationserschließung

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: 04. Juni 2021)

Suchergebnisse

• 1
  Positionspapier der DMV zur Verwendung bibliometrischer Daten.Online: 21.02.2020.
  In: Mitteilungen der Deutschen Mathematiker-Vereinigung. 2019, H.3-4, S.112-117.
  
  Abstract: Bibliometrische Daten werden heute zunehmend in der Evaluation von Forschungsergebnissen benutzt. Diese Anwendungen reichen von der (indirekten) Verwendung bei der Peer-Evaluation von Drittmittelanträgen über die Beurteilung von Bewerbungen in Berufungskommissionen oder Anträgen für Forschungszulagen bis hin zur systematischen Erhebung von forschungsorientierten Kennzahlen von Institutionen. Mit diesem Dokument will die DMV ihren Mitgliedern eine Diskussionsgrundlage zur Verwendung bibliometrischer Daten im Zusammenhang mit der Evaluation von Personen und Institutionen im Fachgebiet Mathematik zur Verfügung stellen, insbesondere auch im Vergleich zu anderen Fächern. Am Ende des Texts befindet sich ein Glossar, in dem die wichtigsten Begriffe kurz erläutert werden.
  
  Inhalt: Vgl.: https://doi.org/10.1515/dmvm-2019-0040.
  
  Themenfeld: Informetrie
  Objekt: h-index ; Altmetrics
  
  
• 2
  Barnes, C.S.: ¬The construct validity of the h-index.
  In: Journal of documentation. 72(2016) no.5, S.878-895.
  
  Abstract: Purpose The purpose of this paper is to show how bibliometrics would benefit from a stronger programme of construct validity. Design/methodology/approach The value of the construct validity concept is demonstrated by applying this approach to the evaluation of the h-index, a widely used metric. Findings The paper demonstrates that the h-index comprehensively fails any test of construct validity. In simple terms, the metric does not measure what it purports to measure. This conclusion suggests that the current popularity of the h-index as a topic for bibliometric research represents wasted effort, which might have been avoided if researchers had adopted the approach suggested in this paper. Research limitations/implications This study is based on the analysis of a single bibliometric concept. Practical implications The conclusion that the h-index fails any test in terms of construct validity implies that the widespread use of this metric within the higher education sector as a management tool represents poor practice, and almost certainly results in the misallocation of resources. Social implications This paper suggests that the current enthusiasm for the h-index within the higher education sector is misplaced. The implication is that universities, grant funding bodies and faculty administrators should abandon the use of the h-index as a management tool. Such a change would have a significant effect on current hiring, promotion and tenure practices within the sector, as well as current attitudes towards the measurement of academic performance. Originality/value The originality of the paper lies in the systematic application of the concept of construct validity to bibliometric enquiry.
  
  Inhalt: Vgl.: http://dx.doi.org/10.1108/JD-10-2015-0127.
  
  Themenfeld: Informetrie
  Objekt: h-index
  
  
• 3
  Schmitz, J. ; Arning, U. ; Peters, I.: handbuch.io : Handbuch CoScience / Messung von wissenschaftlichem Impact.
  In: http://handbuch.io/w/Handbuch_CoScience/Messung_von_wissenschaftlichem_Impact.
  
  Abstract: Die Bewertung der Forschungs- und Publikationsleistung spielt in unterschiedlichen Kontexten im Wissenschaftssystem eine große Rolle, insbesondere weil Drittmittel knapp und mit Renommee verbundene Stellen wie Professuren rar sind. Neben der inhaltlichen und qualitativen Bewertung der wissenschaftlichen Leistung durch Peer Review, wird auch versucht, Publikationsleistungen von Wissenschaftlerinnen und Wissenschaftlern, Instituten oder Arbeitsgruppen zu quantifizieren. Diese "Vermessung" von Publikationen wird auch als Bibliometrie (engl. bibliometrics) oder Szientometrie (engl. scientometrics) bezeichnet. Entscheidend sind hierbei in erster Linie drei Kennzahlen: - Produktivität: Anzahl der Publikationen - Wirkung/Impact: Anzahl der Zitationen - Kooperationen: Anzahl der Artikel, die man gemeinsam mit anderen Autoren oder Institutionen publiziert. Der Zitierung kommt in der Wissenschaft eine besondere Bedeutung zu.
  
  Inhalt: DOI: 10.2314/coscv2.10
  
  Themenfeld: Informetrie
  Objekt: h-Index ; Altmetrics
  
  
• 4
  Schreiber, M.: ¬A variant of the h-index to measure recent performance.
  In: Journal of the Association for Information Science and Technology. 66(2015) no.11, S.2373-2380.
  (Brief communications)
  
  Abstract: The predictive power of the h-index has been shown to depend on citations to rather old publications. This has raised doubts about its usefulness for predicting future scientific achievements. Here, I investigate a variant that considers only recent publications and is therefore more useful in academic hiring processes and for the allocation of research resources. It is simply defined in analogy to the usual h-index, but takes into account only publications from recent years, and it can easily be determined from the ISI Web of Knowledge.
  
  Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23438/abstract.
  
  Themenfeld: Informetrie
  Objekt: h-index
  
  
• 5
  Crispo, E.: ¬A new index to use in conjunction with the h-index to account for an author's relative contribution to publications with high impact.
  In: Journal of the Association for Information Science and Technology. 66(2015) no.11, S.2381-2383.
  (Brief communications)
  
  Abstract: The h-index was devised to represent a scholar's contributions to his field with respect to the number of publications and citations. It does not, however, take into consideration the scholar's position in the authorship list. I recommend a new supplementary index to score academics, representing the relative contribution to the papers with impact, be reported alongside the h-index. I call this index the AP-index, and it is simply defined as the average position in which an academic appears in authorship lists, on articles that factor in to that academic's h-index.
  
  Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23426/abstract.
  
  Themenfeld: Informetrie
  Objekt: h-index
  
  
• 6
  Malesios, C.: Some variations on the standard theoretical models for the h-index : a comparative analysis.
  In: Journal of the Association for Information Science and Technology. 66(2015) no.11, S.2384-2388.
  (Brief communications)
  
  Abstract: Various mathematical models have been proposed in the recent literature for estimating the h-index using measures such as number of articles (P) and citations received (C). These models have been previously empirically tested assuming a mathematical model and predetermining the models' parameter values at some fixed constant. The present study, from a statistical modeling viewpoint, investigates alternative distributions commonly used for this type of point data. The study shows that the typical assumptions for the parameters of the h-index mathematical models in such representations are not always realistic, with more suitable specifications being favorable. Prediction of the h-index is also demonstrated.
  
  Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23410/abstract.
  
  Themenfeld: Informetrie
  Objekt: h-index
  
  
• 7
  Chang, K.-C. ; Zhou, W. ; Zhang, S. ; Yuan, C,-C.: Threshold effects of the patent H-index in the relationship between patent citations and market value.
  In: Journal of the Association for Information Science and Technology. 66(2015) no.12, S.2697-2703.
  
  Abstract: This study employs a panel threshold regression model to test whether the patent h-index has a threshold effect on the relationship between patent citations and market value in the pharmaceutical industry. It aims to bridge the gap in extant research on this topic. This study demonstrates that the patent h-index has a triple threshold effect on the relationship between patent citations and market value. When the patent h-index is less than or equal to the lowest threshold, 4, there is a positive relationship between patent citations and market value. This study indicates that the first regime (where the patent h-index is less than or equal to 4) is optimal, because this is where the extent of the positive relationship between patent citations and market value is the greatest.
  
  Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23354/abstract.
  
  Themenfeld: Informetrie
  Wissenschaftsfach: Patentinformation
  Objekt: h-index
  
  
• 8
  Bartolucci, F.: ¬A comparison between the g-index and the h-index based on concentration.
  In: Journal of the Association for Information Science and Technology. 66(2015) no.12, S.2708-2710.
  (Brief communications)
  
  Abstract: I discuss how, given a certain number of articles and citations of these articles, the h-index and the g-index are affected by the level of concentration of the citations. This offers the opportunity for a comparison between these 2 indices from a new perspective.
  
  Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23440/abstract.
  
  Themenfeld: Informetrie
  Objekt: g-index ; h-index
  
  
• 9
  Xu, F. ; Liu, W.B. ; Mingers, J.: New journal classification methods based on the global h-index.
  In: Information processing and management. 51(2015) no.2, S.50-61.
  
  Abstract: In this work we develop new journal classification methods based on the h-index. The introduction of the h-index for research evaluation has attracted much attention in the bibliometric study and research quality evaluation. The main purpose of using an h-index is to compare the index for different research units (e.g. researchers, journals, etc.) to differentiate their research performance. However the h-index is defined by only comparing citations counts of one's own publications, it is doubtful that the h index alone should be used for reliable comparisons among different research units, like researchers or journals. In this paper we propose a new global h-index (Gh-index), where the publications in the core are selected in comparison with all the publications of the units to be evaluated. Furthermore, we introduce some variants of the Gh-index to address the issue of discrimination power. We show that together with the original h-index, they can be used to evaluate and classify academic journals with some distinct advantages, in particular that they can produce an automatic classification into a number of categories without arbitrary cut-off points. We then carry out an empirical study for classification of operations research and management science (OR/MS) journals using this index, and compare it with other well-known journal ranking results such as the Association of Business Schools (ABS) Journal Quality Guide and the Committee of Professors in OR (COPIOR) ranking lists.
  
  Inhalt: Vgl.: doi: 10.1016/j.ipm.2014.10.011.
  
  Themenfeld: Informetrie
  Objekt: h-index
  
  
• 10
  Prathap, G.: ¬The zynergy-index and the formula for the h-index.
  In: Journal of the Association for Information Science and Technology. 65(2014) no.2, S.426-427.
  (Brief communication)
  
  Abstract: The h-index, as originally proposed (Hirsch, 2005), is a purely heuristic construction. Burrell (2013) showed that efforts to derive formulae from the mathematical framework of Lotkaian informetrics could lead to misleading results. On this note, we argue that a simple heuristic "thermodynamical" model can enable a better three-dimensional (3D) evaluation of the information production process leading to what we call the zynergy-index.
  
  Themenfeld: Informetrie
  Objekt: h-index ; zynergy-index.
  
  
• 11
  Ye, F.Y. ; Leydesdorff, L.: ¬The "academic trace" of the performance matrix : a mathematical synthesis of the h-index and the integrated impact indicator (I3).
  In: Journal of the Association for Information Science and Technology. 65(2014) no.4, S.742-750.
  
  Abstract: The h-index provides us with 9 natural classes which can be written as a matrix of 3 vectors. The 3 vectors are: X = (X1, X2, X3) and indicates publication distribution in the h-core, the h-tail, and the uncited ones, respectively; Y = (Y1, Y2, Y3) denotes the citation distribution of the h-core, the h-tail and the so-called "excess" citations (above the h-threshold), respectively; and Z = (Z1, Z2, Z3) = (Y1-X1, Y2-X2, Y3-X3). The matrix V = (X,Y,Z)T constructs a measure of academic performance, in which the 9 numbers can all be provided with meanings in different dimensions. The "academic trace" tr(V) of this matrix follows naturally, and contributes a unique indicator for total academic achievements by summarizing and weighting the accumulation of publications and citations. This measure can also be used to combine the advantages of the h-index and the integrated impact indicator (I3) into a single number with a meaningful interpretation of the values. We illustrate the use of tr(V) for the cases of 2 journal sets, 2 universities, and ourselves as 2 individual authors.
  
  Themenfeld: Informetrie
  Objekt: h-index ; Integrated impact indicator (I3)
  
  
• 12
  Prathap, G.: Measures for impact, consistency, and the h- and g-indices.
  In: Journal of the Association for Information Science and Technology. 65(2014) no.5, S.1076-1078.
  (Brief communication)
  
  Abstract: An altogether different view on the properties of a good performance measure than that given in Egghe (2012) is offered. Egghe argued that a good impact measure should reward nonconsistency; that is, the more citations over papers are unequally distributed, the higher the impact should be. Here, a quantitative proxy for consistency is offered, and it is shown that as consistency increases, the ideal performance measure, which is sensitive to changes in consistency, should increase, reflecting this virtue.
  
  Themenfeld: Informetrie
  Objekt: h-index ; g-index
  
  
• 13
  Schreiber, M.: Restricting the h-index to a citation time window : a case study of a timed Hirsch index.
  In: http://arxiv.org/abs/1412.5050.
  
  Abstract: The h-index has been shown to increase in many cases mostly because of citations to rather old publications. This inertia can be circumvented by restricting the evaluation to a citation time window. Here I report results of an empirical study analyzing the evolution of the thus defined timed h-index in dependence on the length of the citation time window.
  
  Themenfeld: Informetrie
  Objekt: h-index
  
  
• 14
  Egghe, L.: Note on a possible decomposition of the h-Index.
  In: Journal of the American Society for Information Science and Technology. 64(2013) no.4, S.871.
  (Letter to the editor)
  
  Themenfeld: Informetrie
  Objekt: h-index
  
  
• 15
  Abramo, G. ; D'Angelo, C.A. ; Viel, F.: Assessing the accuracy of the h- and g-indexes for measuring researchers' productivity.
  In: Journal of the American Society for Information Science and Technology. 64(2013) no.6, S.1224-1234.
  
  Abstract: Bibliometric indicators are increasingly used in support of decisions about recruitment, career advancement, rewards, and selective funding for scientists. Given the importance of the applications, bibliometricians are obligated to carry out empirical testing of the robustness of the indicators, in simulations of real contexts. In this work, we compare the results of national-scale research assessments at the individual level, based on the following three different indexes: the h-index, the g-index, and "fractional scientific strength" (FSS), an indicator previously proposed by the authors. For each index, we construct and compare rankings lists of all Italian academic researchers working in the hard sciences during the period 2001-2005. The analysis quantifies the shifts in ranks that occur when researchers' productivity rankings by simple indicators such as the h- or g-indexes are compared with those by more accurate FSS.
  
  Themenfeld: Informetrie
  Objekt: g-index ; h-index ; FSS
  
  
• 16
  Bertoli-Barsotti, L.: Improving a decomposition of the h-index.
  In: Journal of the American Society for Information Science and Technology. 64(2013) no.7, S.1522.
  (Letter to the editor)
  
  Themenfeld: Informetrie
  Objekt: h-index
  
  
• 17
  Burrell, Q.L.: Formulae for the h-index : a lack of robustness in Lotkaian informetrics?.
  In: Journal of the American Society for Information Science and Technology. 64(2013) no.7, S.1504-1514.
  
  Abstract: In one of the first attempts at providing a mathematical framework for the Hirsch index, Egghe and Rousseau (2006) assumed the standard Lotka model for an author's citation distribution to derive a delightfully simple closed formula for his/her h-index. More recently, the same authors (Egghe & Rousseau, 2012b) have presented a new (implicit) formula based on the so-called shifted Lotka function to allow for the objection that the original model makes no allowance for papers receiving zero citations. Here it is shown, through a small empirical study, that the formulae actually give very similar results whether or not the uncited papers are included. However, and more important, it is found that they both seriously underestimate the true h-index, and we suggest that the reason for this is that this is a context-the citation distribution of an author-in which straightforward Lotkaian informetrics is inappropriate. Indeed, the analysis suggests that even if we restrict attention to the upper tail of the citation distribution, a simple Lotka/Pareto-like model can give misleading results.
  
  Themenfeld: Informetrie
  Objekt: h-index
  
  
• 18
  Pillay, A.: Academic promotion and the h-index.
  In: Journal of the American Society for Information Science and Technology. 64(2013) no.12, S.2598-2599.
  (Letter to the editor)
  
  Objekt: h-index
  
  
• 19
  Hovden, R.: Bibliometrics for Internet media : applying the h-index to YouTube.
  In: Journal of the American Society for Information Science and Technology. 64(2013) no.11, S.2326-2331.
  
  Abstract: The h-index can be a useful metric for evaluating a person's output of Internet media. Here I advocate and demonstrate adaption of the h-index and the g-index to the top video content creators on YouTube. The h-index for Internet video media is based on videos and their view counts. The h-index is defined as the number of videos with >=h × 10**5 views. The g-index is defined as the number of videos with >=g × 10**5 views on average. When compared with a video creator's total view count, the h-index and g-index better capture both productivity and impact in a single metric.
  
  Themenfeld: Informetrie
  Objekt: h-index ; g-index ; YouTube
  
  
• 20
  Ferrara, E. ; Romero, A.E.: Scientific impact evaluation and the effect of self-citations : mitigating the bias by discounting the h-index.
  In: Journal of the American Society for Information Science and Technology. 64(2013) no.11, S.2332-2339.
  
  Abstract: In this article, we propose a measure to assess scientific impact that discounts self-citations and does not require any prior knowledge of their distribution among publications. This index can be applied to both researchers and journals. In particular, we show that it fills the gap of the h-index and similar measures that do not take into account the effect of self-citations for authors or journals impact evaluation. We provide 2 real-world examples: First, we evaluate the research impact of the most productive scholars in computer science (according to DBLP Computer Science Bibliography, Universität Trier, Trier, Germany); then we revisit the impact of the journals ranked in the Computer Science Applications section of the SCImago Journal & Country Rank ranking service (Consejo Superior de Investigaciones Científicas, University of Granada, Extremadura, Madrid, Spain). We observe how self-citations, in many cases, affect the rankings obtained according to different measures (including h-index and ch-index), and show how the proposed measure mitigates this effect.
  
  Themenfeld: Informetrie
  Objekt: h-index ; DBLP Computer Science Bibliography