1,720,962 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
Scale Dependence of Mean Transverse Momentum Fluctuations at Top SPS Energy measured by the CERES experiment and studies of gas properties for the ALICE experiment
No full textThe principal aim of the study of ultrarelativistic nucleus-nucleus collisions is the search for evidence of a transient state of deconfined quarks and gluons in the early, dense and hot stage of the reaction. Non-statistical event-by-event fluctuations of mean transverse momentum,p_T, have been proposed as a possible signature for the QCD phase transition, in particular for the critical point. However, the magnitude of the measured fluctuations is not as large as anticipated. Since fluctuations were characterized so far by one single (integral) number, it was difficult to estimate the many possible contributions to them. Taking into account the high available statistics offered by the CERES experiment combined with the full azimuthal acceptance, a differential study of mean p_T fluctuations is performed, which provides the sensitivity to discriminate among various correlation sources. For the first time at SPS energy, the charge-dependent mean p_T fluctuations have been analyzed as a function of the angular pair separation, Delta(phi), and of the separation in pseudorapidity, Delta(eta). Thus, we are able to show that the overall fluctuations are dominated by the short range correlation peak at small opening angles (`near-side'), most probably originating from Bose-Einstein and Coulomb effects between pairs of particles emitted with similar velocities. Another important contribution is a broad maximum at Delta(phi) = 180 degrees (`away-side') originating from back-to-back (jet-like) correlations. Since the fluctuations related to the critical point should be present for all opening angles the best strategy is to focus on the fluctuations in the region of 30 < Delta(phi) <60 degrees, free of the influence of the two mentioned components, and where the elliptic flow cancels out. Concerning the observed away-side peak, we demonstrate that it comes from high-p_T correlations that cannot be attributed to the elliptic flow. The second part of the thesis is dedicated to studies of gas properties for the ALICE experiment at the CERN LHC. Drift velocity and gain measurements have been performed for a number of gas mixtures in order to assess the effect of nitrogen which is expected to accumulate in the gas volume over long periods of running. The ALICE Transition Radiation Detector (TRD) is designed to work with a gas of 85 % Xe and 15 % CO2. Some of the nine isotopes of Xe have very high neutron capture cross-section leading to multi-gamma deexcitation cascades which produce background for the physical signals. An exhaustive study of this issue based on Monte Carlo simulations is presented, demonstrating that the level of this background is low enough not to cause deterioration in the performance of the detector. In addition, the resulting radioactivity and dose rate of the active gas system of ALICE TRD activated by slow neutrons is investigated and appear to be low and safe
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
Scale dependence of mean transverse momentum fluctuations at top SPS energy measured by the CERES experiment: and studies of gas properties for the ALICE experiment
No full textkoamabayili/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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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