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Van der Veer Martens, B.: Do citation systems represent theories of truth? (2001) 0.02

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Date: 22. 7.2006 15:22:28

Herb, U.: Auch Pierre Bourdieu ist ein Indexierungsopfer (2017) 0.01

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Language: d

Klein, A.: Von der Schneeflocke zur Lawine : Möglichkeiten der Nutzung freier Zitationsdaten in Bibliotheken (2017) 0.00

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Language: d
Location: D

Herb, U.: Ablehnungsquoten wissenschaftlicher Journale (2016) 0.00

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Language: d

Herb, U.: Überwachungskapitalismus und Wissenschaftssteuerung (2019) 0.00

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Language: d

Krattenthaler, C.: Was der h-Index wirklich aussagt (2021) 0.00

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Language: d

Bagrow, J.P.; Rozenfeld, H.D.; Bollt, E.M.; Ben-Avraham, D.: How famous is a scientist? : famous to those who know us (2004) 0.00

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Hirschmann, B.: Altmetrics - neue Formen der Impact-Messung auf dem Vormarsch? (2013) 0.00

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Language: d

Schmitz, J.; Arning, U.; Peters, I.: handbuch.io : Handbuch CoScience / Messung von wissenschaftlichem Impact (2015) 0.00

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Language: d

Positionspapier der DMV zur Verwendung bibliometrischer Daten (2020) 0.00

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Language: d

Rötzer, F.: Bindestriche in Titeln von Artikeln schaden der wissenschaftlichen Reputation (2019) 0.00

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Tavakolizadeh-Ravari, M.: Analysis of the long term dynamics in thesaurus developments and its consequences (2017) 0.00
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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."

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