1,720,958 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
Collision of molecular outflows in the L1448--C system
Get PDFWe present a study of the central zone of the star-forming region L1448 at
217--230 GHz ( 1.3 mm) using ALMA observations. Our study focuses on the
detection of proto-stellar molecular outflows and the interaction with the
surrounding medium toward sources L1448--C(N) and L1448--C(S). Both sources
exhibit continuum emission, with L1448--C(N) being the brightest one. Based on
its spectral index and the associated bipolar outflow, the continuum emission
is the most likely to be associated with a circumstellar disk. The CO(J=21) and SiO(J= 54) emissions associated with
L1448--C(N) trace a bipolar outflow and a jet oriented along the
northwest-southeast direction. The CO(J=21) outflow for
L1448--C(N) has a wide-open angle and a V-shape morphology. The SiO jet is
highly collimated and has an axial extent comparable with the CO(J=21) emission. There is not SiO(J= 54)
emission towards L1448--C(S), but there is CO(J=21)
emission. The observations revealed that the red-shifted lobes of the CO(J=21) outflows of L1448--C(N) and L1448--C(S) are
colliding. As a result of this interaction, the L1448-C(S) lobe seems to be
truncated. The collision of the molecular outflows is also hinted by the SiO(J=
54) emission, where the velocity dispersion increases
significantly in the interaction zone. We also investigated whether it could be
possible that this collision triggers the formation of new stars in the
L1448--C system.Comment: 11 pages, 7 figures, Accepted for publication in Monthly Notices of
the Royal Astronomical Society (MNRAS) DOI: 10.1093/mnras/stad98
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
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