1,721,081 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
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
Libri delle Medaglie da Cesare a Marco Aurelio Commodo
No full textSi tratta della trascrizione del testo di Logorio, architetto, pittore ma soprattutto antiquario con spiccato interesse per la numismatica accompagnato dal relativo apparato di note bibliografiche e critiche del testo che va da Domiziano a AdrianoTranscription of the text of Ligorio a famous italian architect, painter and antiquarian with the notes for the period from of Domitian to Hadrian
Microwave Technology Applied to a Vulcanized Model Rubber Compound: Reclamation and Recycling Ability
No full textThe objective of this work was to investigate the effects of a thermal treatment induced by microwaves (MW) and applied to a simple rubbery model system. This has to be intended as the first step of a study whose final goal is to find an effective, industrially applicable, way to induce partial devulcanization, and improve recycling capabilities, in more complex systems like end-use tyres, whose disposal constitutes a severe environmental issue.
The chosen system was based on a styrene-butadiene rubber (SBR) mixed with vulcanization agents. Such “uncured rubber” (UR) was vulcanized under static load to give the reference “vulcanized rubber” (VR), and finally processed in a MW oven to obtain a “treated rubber” (TR). All the materials were characterized in terms of gel-percentage and mechanical properties. In order to evaluate the effects of MW treatment on the recycling capability of the rubber, the UR was loaded with various levels of TR, in a range from 20 to 100 phr, and then subjected to re-vulcanization. Besides the reference VR, also samples obtained by re-vulcanization of UR loaded with cryo-milled vulcanized rubber (CR) were considered for comparison. Rheological, calorimetric, stress-strain and dynamic-mechanical characterizations were performed on all the obtained compounds. By this way it was possible to assess how the addition of either TR or CR to the virgin material influences both the curing process and the properties of the final product. While loaded systems generally showed less attractive mechanical properties than the original VR, the TR-loaded compounds had better performances than those with analogous contents of cryo-milled VR. Moreover, a significant increase of the glass transition temperature was observed in the final material, indicating that the “recycled” part was still able to participate in the second vulcanization process
The generally covariant meaning of space distances
No full textWe propose a covariant and geometric framework to introduce space distances as they are used by astronomers. In particular, we extend the definition of space distances from the one used between events to non-test bodies with horizons and singularities so that the definition extends through the horizons and it matches the protocol used to measure them. The definition we propose can be used in standard general relativity although it extends directly to Weyl geometries to encompass a number of modified theories, extended theories in particular
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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