1,721,234 research outputs found
Production of charged pions, kaons, and (anti-)protons in Pb-Pb and inelastic pp collisions at root s(NN)=5.02 TeV
Full text linkInvestigation of azimuthal anisotropy using multi-particle correlations of identified hadrons at the LHC with ALICE detector
No full textThe primary goal of ultra-relativistic heavy-ion physics is the study of the created strongly-interacting quark-gluon plasma (sQGP). Measurements of the azimuthal anisotropy of created particles, quantified by anisotropic flow coefficients, compared to hydrodynamic calculations, can be used to investigate this unique state of nuclear matter and its properties. Due to the absence of the QGP-like medium, small collision systems have been considered as a baseline for the heavy-ion measurements. However, high-multiplicity pp and p-Pb collisions have revealed similar collective behaviour traditionally associated with the expanding medium. The origin of such features is not yet understood and is a focus point of the present work. This work presents the analysis of azimuthal correlations of inclusive charged hadrons and identified , , , , , and meson in Pb-Pb and p-Pb collisions at recorded by ALICE detector at the Large Hadron Collider. Besides the measurement obtained for the first time using the 4-particle cumulants, more advanced observables such as flow fluctuations and non-linear flow response are studied in Pb-Pb collisions. The presented results exhibit an explicit mass ordering consistent with the radial expansion with universal velocity, as described by hydrodynamical calculations based on the iEBE-VISHNU model for low , and baryon/meson grouping at intermediate region. Non-flow correlations, arising from jet fragmentation and resonance decays, present a challenge as they generally dominate in small collision systems. In order to reduce such contamination, a pseudo-rapidity separation between correlated particles is applied as well as subtraction of remaining non-flow estimate based on a measurement of minimum-bias pp collisions at . Motivated by Pb-Pb measurements, an initial attempt for extracting using the 4-particle cumulant is made. The mass-related features observed in Pb-Pb collisions are also apparent in non-flow subtracted p-Pb measurement. Overall, these differential measurements of coefficients present challenges for theoretical calculations further constraining the medium properties as well as initial conditions of the collision. In addition to the inclusive particles, the measurements using identified hadrons provide unique insights into particle production mechanisms. The results presented here mark a starting point for potential future development in investigating the obscure origin of the collectivity by analysing high-multiplicity pp collisions
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
Exploration of jet substructure using iterative declustering in pp and Pb-Pb collisions at LHC energies
Full text linkDispelling 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
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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