1,721,456 research outputs found
Heavy flavour production in ATLAS
No full textThe associated production of vector boson with quarkonia is a key observable for understanding the quarkonium production mechanisms, including the separation of single and double parton scattering components. Using data collected by the ATLAS experiment, measurements of prompt and non-prompt and mesons with between 60-360 GeV is reported at = 13 TeV in collisions. A measurement of the production of a prompt in association with a boson is presented at =8 TeV in collisions
ATLAS Results in Hadron Spectroscopy and Production
No full textThe ATLAS experiment has investigated strong force dynamics via searches for exotic hadron states and measurements of production rates. Studies of potential pentaquark and tetraquark candidates will be discussed, as will measurements of charmonium and B hadron differential cross sections
Jet transverse energy shape in proton-antiproton collisions at 1.8 TeV
No full textThe distribution of the transverse energy flow in hadronic jets has been measured in pp collisions at = 1.8 TeV at the Fermilab collider using the DOdetector. These measurements of jet shape are made in two regions of pseudo-rapidity centered at 0 and 2.7 as a function of jet transverse energy. Comparisons are made with phenomenological Monte Carlo simulations and next-to-leading-order QCD calculations without parton fragmentation
Heavy flavor production and spectroscopy at ATLAS
No full textATLAS has a wide programme to study the production properties of conventional and exotic quarkonium, beauty, and charm bound states. This presentation will cover the latest results on J/psi, psi2s and Upsilon production at 7, 8, and 13 TeV, and D meson production with Run-1 data. The latest results in the ATLAS programme of heavy hadron production and spectroscopy are also presented, including studies of B_c and Lambda_b decays, and a measurement of b-quark fragmentation functions
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
- …
