1,720,997 research outputs found
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
Local and global approaches for the integration of up-to-date geo-db and ancient maps within the Atl@s portal
No full textIn the framework of the Atl@s portal project, aimed to achieve the georeferencing of historical cartography into modern mapping grids, in this paper a task concerning the integration of up-to-date spatial geo-db to ancient maps is presented. The main aim is to guarantee the web visualization and diffusion of the geo-iconographic historical contents in a detailed territorial dimension. The research is focused on algorithms and tools implemented within open source environment to support advanced georeferencing methodologies, to define and test technical specifications, and to improve an automatic approach. The standard procedure for georeferencing historical maps is based on the use of ground control points to compute an independent transformation for each map sheet (“local” approach). Here a “global” solution, which also includes some adjacency constraints between close sheets, is proposed. Furthermore, some initial tests are described by considering the “Map of the Astronomi di Brera” of Milano city (Italy, 1807), made up of 39 sheets at 1:1,000 scale
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
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
Centrospazio Progress on MPDT Hollow Cathodes
No full textThe paper deals with Alta-Centrospazio progress in the frame of the numerical activity on high-current hollow cathodes for MPD thrusters applications, started about three years ago with the development of a stationary, one-dimension single-channel hollow cathode
model. As shown in the first part of the paper, this model has been modified in order to
account for the presence of an orificed plate at the cathode outlet and numerical results agree well with experimental data gathered on a 5-kW-class MPD thruster, tested at the RIAME-MAI laboratory under Centrospazio contract. In the second part the paper describes Alta-Centrospazio first attempts of developing a numerical model of a multiplechannel hollow cathode on the base of the acquired experience on the single-channel cathode
model. Preliminary encouraging results show the model is able to reproduce some characteristic features of such a type of cathode, also with respect to the single-channel configuration. Finally the paper briefly illustrates main future developments concerning Alta-Centrospazio activity on MPD thruster cathodes study
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
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