1,721,001 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
Technical and commercial comparison of an active offshore access system in the wind farm DanTysk
Get PDFDiese Arbeit befasst sich mit der Frage nach dem Nutzen und der Wirtschaftlichkeit eines aktiven Systems für das Übersteigen in einem Offshore Windpark. Ein solches Über-stiegssystem ist auf einem Crewschiff montiert und gleicht die Bewegung des Schiffes gegenüber einem fest stehenden Fundament auf See aus. Dabei ist das Ziel, dass Perso-nen im Vergleich zum direkten Übersteigen von einem Crewschiff bei einer höheren signi-fikanten Wellenhöhe noch übersteigen können. Um die Vor-und Nachteile am Ende beur-teilen zu können, wird die Situation in einem Offshore Windpark mit Blick auf die Versor-gung und die Einsatzfahrten, sowie die vorherrschenden Wetterbedingungen betrachtet. Es werde Anforderungen an ein solches System gestellt und anschließend ein aktuelles Überstiegssystem aus technischer Sicht vorgestellt. Mit der Betrachtung der Kosten wird am Ende der Arbeit eine Bewertung durchgeführt, in der alle behandelten Aspekte enthal-ten sind. Zum Abschluss wird ein Ausblick über den Einsatz solcher Überstiegssystem gegeben.This paper's intention is to deal with the benefit and thriftiness of an active system for crossing between a crew transfer vessel and a foundation in an offshore wind farm. Such an access system is fixed on a crew transfer vessel and balances the movement of the vessel compared to a fixed foundation at sea. Therefore, the aim is that in a comparison to the direct cross people are able to cross from a crew transfer vessel, while dealing with a much higher significant wave height. To assess advantages and disadvantages, the situation of an offshore wind farm is considered in view of certain points. Firstly, replen-ishment. Secondly, operations. Thirdly, in terms of prevailing weather conditions. Fur-thermore, requirements are imposed on such a system and a current access system is technically introduced. In addition, in consideration of expenses an assessment is con-ducted, which contains the mentioned issues. Finally, an outlook about the use of such access systems is given
Aufbau und Instandhaltung von Multirotorwindenergieanlagen
Get PDFDie Entwicklung von immer leistungsstärkeren Windenergieanlagen stellt die Entwickler vor zunehmende Probleme hinsichtlich ihrer Größe und ihres Gewichtes. Um zukünftig weitere Leistungssteigerungen bei Windenergieanlagen zu erreichen, rücken zunehmend innovative Anlagenkonzepte in den Fokus. Multirotorwindenergieanlagen bieten das Potenzial, hohe Nennleistungen mit vergleichsweise geringen Eigengewichten und Kosten zu realisieren. Der Aufbau sowie die Wartung und Instandhaltung der Multirotorwindenergieanlagen können einen großen Einfluss auf die Stromgestehungskosten ausmachen, sind jedoch zum heutigen Zeitpunkt weitestgehend unerforscht. In dieser Masterarbeit werden grundlegende Überlegungen und Berechnungen zu folgenden Themen bearbeitet:
• Entwicklung und Vergleich verschiedener Aufbaumethoden von Multirotorwindenergieanlagen.
• Erarbeitung und Vergleich verschiedener Wartungskrankonzepte und Bestimmung ihrer potenziellen Gewichtseinflüsse auf die Multirotorwindenergieanlagen.
• Erstellung einer Lebenszyklussimulation von Multirotorwindenergieanlagen zur Untersuchung und zum Vergleich der Zuverlässigkeit von Multirotorwindenergieanlagen mit konventionellen Windenergieanlagen.The development of more powerful wind turbines causes increasing problems for developers regarding the size and weight of the turbines. In order to achieve further increase in the power of wind turbines, innovative wind turbine systems get into the focus the developers. Multi rotor wind turbines offer the potential to achieve high rated outputs with comparatively low weights and costs. The installation and the maintenance of the multi rotor wind turbines can have a major influence on the LCOE but are largely unexplored at the present time. Fundamental consideration and calculation on the following tops are dealt with in this master’s thesis:
• Development and comparison of different installation methods of multi rotor wind turbines.
• Development and comparison of various maintenance crane concepts and determination of their potential weight influence on the multi rotor wind turbine.
• Creation of a life cycle simulation of multi rotor wind turbines to investigate and compare their reliability with conventional wind turbines
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