1,720,972 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
Benthische Foraminiferen und Umweltveränderungen in der SW Ostsee
Get PDFBenthic foraminifera were tested as proxies of the environmental change in Kiel and Flensburg Fjords of the Kiel Bight. Foraminiferal assemblages of entire Flensburg Fjord were surveyed for the first time and showed five assemblages mainly controlled by food availability. In both fjords the significant changes in species composition were observed since the middle of the last century: disappearance of the arenaceous species Ammotium cassis and invasion of calcareous Ammonia beccarii. These changes are associated with the generally lower intensity and frequency of major Baltic inflows since the 1960s. The distribution of foraminiferal test abnormalities revealed eighteen types of abnormal tests in both fjords. The highest abnormality frequencies were observed in the outer parts of the fjords facing salt-water inflows. In the inner fjords elevated levels of heavy metals apparently led to higher percentages of abnormalities. A conceptual model depicting the relationship between salinity tolerance of foraminifera and the development of test abnormalities indicates that abnormalities cannot be used exclusively as pollution indicators.Die vorliegende Arbeit hat zum Ziel, die Foraminiferen als Proxies der rezenten Umweltsveränderungen, natürliche und anthropogene, in zwei flachen Förden der Kieler Bucht (SW Ostsee) auszuwerten. Auf Grund einer mittelmäßigen Schwermetallverschmutzung wurde die Kieler Förde als Untersuchungsgebiet ausgesucht. Ein Vergleich mit historischen Daten zeigte deutliche Veränderungen in der Artenzusammensetzung und der Populationsdichte. Ammonia beccarii, eurihalin und eine sehr opportunistische, kalkschalige Art, ist in die Kieler Förde eingedrungen. Der Sandschaler Ammotium cassis ist hingegen auf Grund eines niedrigeren Salzgehalts und fehlender Sprungschicht in der Kieler Förde seit den neunziger Jahren verschwunden. Die Benthosforaminiferen-Gemeinschaften in der Flensburger Förde wurden zum ersten Mal untersucht. Die Untersuchungen lassen fünf unterschiedliche Foraminiferen-Biofazies erkennen, die hauptsächlich durch Nahrungszufuhr gesteuert werden. Ein Vergleich mit früheren Daten aus den 40er und 70er Jahren zeigte eine Abnahme von Ammotium cassis in der Flensburger Außenförde eine Acme von Ammonia beccarii in der Geltinger Bucht. Diese Veränderungen sind mit der allgemein verringerten Intensität und Häufigkeitsabnahme der Einstromerreignisse seit den sechziger Jahren in Verbindung gebracht wurden. Dabei wurde die höchste Anzahl von Foraminiferen-Schalenmissbildungen in den äußeren Teilen beider Förden beobachtet, welche dem Salzwasser-Einstrom zugewandt sind. Dagegen sind in den Innenförden die erhöhten Schwermetallbelastungen für das häufige Missbildungsvorkommen verantwortlich. Diese Betrachtungsweise erlaubt die Entwicklung eines Modells, das die Verhältnisse zwischen Salinitätstoleranz und Entwicklung der Foraminiferenschalenmissbildungen beschreibt. Dieses Modell zeigt, dass man die Schalenmissbildungen als exklusive Verschmutzungsindikatoren nicht benutzen kann
Benthic foraminifera and environmental change in the South-western Baltic Sea
No full textBenthic foraminifera were tested as proxies of the environmental change in Kiel and Flensburg Fjords of the Kiel Bight. Foraminiferal assemblages of entire Flensburg Fjord were surveyed for the first time and showed five assemblages mainly controlled by food availability. In both fjords the significant changes in species composition were observed since the middle of the last century: disappearance of the arenaceous species Ammotium cassis and invasion of calcareous Ammonia beccarii. These changes are associated with the generally lower intensity and frequency of major Baltic inflows since the 1960s. The distribution of foraminiferal test abnormalities revealed eighteen types of abnormal tests in both fjords. The highest abnormality frequencies were observed in the outer parts of the fjords facing salt-water inflows. In the inner fjords elevated levels of heavy metals apparently led to higher percentages of abnormalities. A conceptual model depicting the relationship between salinity tolerance of foraminifera and the development of test abnormalities indicates that abnormalities cannot be used exclusively as pollution indicators
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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