1,721,530 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
Energy independent scaling of ridge and final state description of high multiplicity p+p collisions at = 7 and 13 TeV
Full text linkAn energy independent scaling of the near-side ridge yield at a given
multiplicity has been observed by the ATLAS and the CMS collaborations in p+p
collisions at s = 7 and 13 TeV. Such a striking feature of the data can be
successfully explained by approaches based on initial state momentum space
correlation generated due to gluon saturation. In this paper, we try to examine
if such a scaling is also an inherent feature of the approaches that employ
strong final state interaction in p+p collisions. We find that hydrodynamical
modeling of p+p collisions using EPOS 3 shows a violation of such scaling. The
current study can, therefore, provide important new insights on the origin of
long range azimuthal correlations in high multiplicity p+p collisions at the
LHC energies.Comment: 5 pages, 4 figures, version published in PR
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
Global and local polarization of and anti- hyperons in Pb-Pb collisions in ALICE
No full textThe extreme temperatures and energy densities generated in the ultrarelativistic nuclear collisions produce a state of partonic matter, the quark-gluon plasma (QGP), which behaves almost like an ideal fluid. The created system may possess large orbital angular momentum leading to the global polarization of particles perpendicular to the reaction plane. Also, local asymmetries in the velocity fields due to anisotropic flow can generate vorticity and particle polarization along the beam direction. In parity-violating weak decays of hyperons, the momentum direction of the decay baryon is correlated with the hyperon spin. This feature can be used to measure the hyperon polarization and estimate the local and global vorticity of the system created in relativistic heavy-ion collisions.
This talk will present the recent experimental measurements of the and hyperons' local and global spin polarization in Pb-Pb collisions in ALICE [1, 2]. The first experimental evidence of a non-zero hyperon spin polarization along the beam direction (local polarization) in Pb-Pb collisions at the LHC will be presented. Also, the global hyperon spin polarization measurement in ALICE, consistent with zero within experimental uncertainties, will be discussed. The comparison of the measured local polarization with the hydrodynamic model calculations, including competing contributions from thermal and shear-induced vorticity, will be shown. A comparison of the ALICE results with the previous STAR measurements and the collision energy dependence of the local and global hyperon spin polarization will be discussed.
[1] ALICE Collaboration, arXiv:2107.11183v1 [nucl-ex] [2] ALICE Collaboration, Phys. Rev. C 101, 044611 (2020)
LHC Seminar - ALICE: https://cern.zoom.us/j/64338816402?pwd=eVdWWGVkbWVIblA4SnJmRFBYWndpUT0
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