1,720,982 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Variations on the Author
Get PDF“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
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Dynamisches Verhalten von Werkzeugaufnahmen
No full textDie Hochschule Reutlingen hat eine vergleichende Untersuchung an Spannfuttern für Schaftfräser vorgenommen. Fazit: Die Steifigkeit einer Aufnahme hat einen stärkeren Einfluss auf das Schwingverhalten als das Dämpfungsvermögen.
Das dynamische Verhalten von Werkzeugmaschinen besitzt entscheidenden Einfluss auf die Bearbeitungsergebnisse. Zusammen mit dem Eigenverhalten der Maschine und dem Werkstück ergibt dies die für die Bearbeitungsgenauigkeit entscheidende statische Steifigkeit und die dynamische Nachgiebigkeit. Im Folgenden wird das Zusammenspiel dieser Komponenten im System näher dargestellt
Werkzeugmaschinen als Bestandteil der Prozesskette in der additiven Fertigung
Get PDFDie Additive Fertigung bietet großes Potenzial zur Erschließung neuer, flexibler und innovativer Fertigungsprozesse mit kurzen Durchlaufzeiten. Erhöhte Komplexität und die Integration von Funktionen in Bauteile wird gefördert. Zur Steigerung der Konkurrenzfähigkeit und weiteren Ausweitung des Einsatzgebietes sind automatisierte Fertigungsschritte nach dem Bauprozess erforderlich. Werkzeugmaschinen spielen auch in der Prozesskette der Additiven Fertigung eine zentrale Rolle bei der Erzeugung von genauen Funktionsflächen. Dabei ist evtl. eine andere Auslegung aufgrund reduzierter Zerspanvolumen und geringeren Flächen möglich
Maschinenzustands- und prozessabhängiges dynamisches Nachgiebigkeitsverhalten
No full textBei der spanenden Bearbeitung metallischer Werkstücke mit Werkzeugmaschinen ist die Produktivität und Qualität der erzeugten Werkstücke wesentliches Kriterium für die Wirtschaftlichkeit. Zur Erreichung dieser Ziele sind genaue Kenntnisse der Leistungsfähigkeit und Eigenschaften der eingesetzten Produktionsmittel erforderlich. Dazu sind seit geraumer Zeit unterschiedliche Methoden der Untersuchung z.B. der statischen und dynamischen Maschineneigenschaften bekannt. Dazu gehören die Messung der statischen und dynamischen Nachgiebigkeit, die Aufnahme der Eigenschwingungen mittels der experimentellen Modalanalyse. Diese Methoden werden häufig nur im Laborbetrieb angewandt. In diesem Beitrag werden Kriterien dargestellt, die bei der Übertragung der Analyse auf den realen Betrieb noch zu berücksichtigen sind, um die Ergebnisse interpretieren zu können
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