1,720,959 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
In-situ monitoring of laser welding processes by means of high frequency acoustic emissions
Get PDFDie Prozessfenster beim Laserstrahlschweißen sind aufgrund vieler Einflussgrößen schmal. Daher spielt in der Großserienproduktion eine prozessnahe Überwachung der Fertigungsqualität eine große Rolle. Dies kann beispielsweise über die Detektion von elektromagnetischen oder akustischen Prozessemissionen realisiert werden. Beides hat bisher nicht zu zufriedenstellenden Überwachungskonzepten geführt. Der Schwerpunkt der Entwicklung lag in den letzten Jahren vorwiegend auf der optischen Prozessüberwachung, da die Detektion resonanter akustischer Emissionen im niederfrequenten Bereich bisher keine verlässlichen Ergebnisse geliefert hat. Daher werden im Rahmen dieser Arbeit die hochfrequenten Körper- und Luftschallemissionen von Laserschweißprozessen untersucht. Es wird die Fragestellung geklärt, ob ein Laserschweißprozess überhaupt hochfrequente Schallemissionen aussendet. Auch wird gezeigt, wie diese mit Stellparametern und Qualitätsmerkmalen einer Laserschweißnaht korreliert werden können und ein Prozessmodell gebildet werden kann. Auf Basis eines solchen Prozessmodells kann eine Fehlerdetektion erfolgen und ein Konzept für die Prozessüberwachung von Laserschweißprozessen mittels hochfrequenten Schallemissionen für die Fertigung erarbeitet werden. Damit können zusätzliche Informationen über den Laserschweißprozess gewonnen werden, was einen wichtigen Beitrag im Hinblick auf die Realisierung eines robusten Prozessüberwachungskonzeptes für das Laserstrahlschweißen liefert.Process windows of laser welding are quite narrow due to different influences. Therefore, process-oriented quality control is a key in large-volume production. This can be realized by detection of electromagnetic or acoustic process emissions. Up to now, both variants were not leading to realization of satisfying concepts of process monitoring. In the last years, the key aspect in this development was mainly put on optical process monitoring, because the detection of resonant acoustic emissions in low frequency ranges were not delivering reliable results. Therefore, the high frequency structure- and air-borne emissions will be deeply investigated in this thesis. The first emphasis will be on the clarification of the existence of high frequency acoustic emissions in laser welding processes besides the already known low frequency resonant acoustic emissions. In the second step, the correlation of these emissions with the parameters and quality characteristics of laser welding seams will be developed. By means of this, a process model will be formed. Based on this process model, a defect detection, as well as a concept for process monitoring of laser welding processes by means of high frequency acoustic emissions, can be established. Using this concept, additional information about laser welding processes can be gained, which helps to realize a robust and stable concept for process monitoring of laser welding in industrial scale
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
In-situ monitoring of laser welding processes by means of high frequency acoustic emissions
No full textDie Prozessfenster beim Laserstrahlschweißen sind aufgrund vieler Einflussgrößen schmal. Daher spielt in der Großserienproduktion eine prozessnahe Überwachung der Fertigungsqualität eine große Rolle. Dies kann beispielsweise über die Detektion von elektromagnetischen oder akustischen Prozessemissionen realisiert werden. Beides hat bisher nicht zu zufriedenstellenden Überwachungskonzepten geführt. Der Schwerpunkt der Entwicklung lag in den letzten Jahren vorwiegend auf der optischen Prozessüberwachung, da die Detektion resonanter akustischer Emissionen im niederfrequenten Bereich bisher keine verlässlichen Ergebnisse geliefert hat. Daher werden im Rahmen dieser Arbeit die hochfrequenten Körper- und Luftschallemissionen von Laserschweißprozessen untersucht. Es wird die Fragestellung geklärt, ob ein Laserschweißprozess überhaupt hochfrequente Schallemissionen aussendet. Auch wird gezeigt, wie diese mit Stellparametern und Qualiätsmerkmalen einer Laserschweißnaht korreliert werden können und ein Prozessmodell gebildet werden kann. Auf Basis eines solchen Prozessmodells kann eine Fekhlerdetektion erfolgen und ein Konzept für die Prozessüberwachung von Laserschweißprozessen mittels hochfrequenter Schallemissionen für die Fertigung erarbeitet werden. Damit können zusätzliche Informationen über den Laserschweißprozess gewonnen werden, was einen wichtigen Beitrag im Hinblick auf die Realisierung eines robusten Prozessüberwachungskonzeptes für das Laserstrahlschweißen liefert.Process windows of laser welding are quite narrow due to different influences. Therefore, process-oriented quality control is a key in large-volume production. This can be realized by detection of electromagnetic or acoustic process emissions. Up to now, both variants were not leading to realization of satisfying concepts of process monitoring. In the last years, the key aspect in this development was mainly put on optical process monitoring, because the detection of resonant acoustic emissions in low frequency ranges were not delivering reliable results. Therefore, the high frequency structure- and air-borne emissions will be deeply investigated in this thesis. The first emphasis will be on the clarification of the existence of high frequency acoustic emissions in laser welding processes besides the already known low frequency resonant acoustic emissions. In the second step, the correlation of these emissions with the parameters and quality characteristics of laser welding seams will be developed. By means of this, a process model will be formed. Based on this process model, a defect detection, as well as a concept for process monitoring of laser welding processes by means of high frequency acoustic emissions, can be established. Using this concept, additional information about laser welding processes can be gained, which helps to realize a robust and stable concept for process monitoring of laser welding in industrial scale
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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