1,720,969 research outputs found
Adaptive Control and Mission Planner Design for Uav Operations with Battery Management
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
A History of the Global Wheat Trade: Actors and Dynamics (1840-1914)
No full textDuring the second half of the 19th century, a new global market for wheat came to the fore. Ever since, scarce and perishable food has been transformed into a modern global commodity, millions of tons of which is sold, bought, and transported across the oceans, providing the “daily bread” for a fast-growing world population. This book explores the historical origin of the global wheat market, offering an actor-centred view of the history of this new global commodity. The contributions to this volume demonstrate that the development of the global wheat trade through the late 19th and early 20th centuries has not only impacted the world food regime, it also led to the dissemination of new economic institutions. Countless technological innovations, such as elevators or telegraphic lines, have paved the way to the creation of new financial tools for trade, such as futures and grain exchanges, which transformed the market. The book also examines new global actors, such as Cargill, Louis-Dreyfus, or Bunge y Born, who took advantage of the new opportunities provided by the interlinked and globalized world grain trade. For the first time in history, the price of a single commodity which was crucial for human life ended up being decided in the areas of production by the producers and started to be fixed further afield, in specific and anonymous trading places. The book will be of great interest to historians of economics, business, trade, agriculture, globalization, and commodities
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
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