1,721,026 research outputs found
Supersymmetry searches at LHC
Full text linkIn this paper, a brief overview of the principal strategies for Supersymmetry
searches with both ATLAS and CMS detectors at LHC is presented.
Particular attention will be devoted to the techniques to estimate the principal SM
backgrounds using real data and to the discovery potential in the mSUGRA scenario
Measurements of SUSY parameters in 2-lepton events with the ATLAS detector
Full text linkA brief overview of the most relevant measurements of SUSY parameters is presented, using events characterised by the presence of two leptons with the ATLAS detector at LHC. Particular attention will be devoted to the determination of the masses of SUSY particles in the mSUGRA scenario with early data
Supersymmetry searches with ATLAS detector at LHC
No full textIn this paper a brief overview of the principal strategies for Supersymmetry searches with ATLAS detector at LHC is presented. The aim is to evaluate the ATLAS discovery potential within mSUGRA parameter space of Supersymmetry, both in inclusive and exclusive channels, and to estimate the achievable precision in SUSY parameters in relation to the integrated luminosity available at LHC
Early Supersymmetry searches with ATLAS detector at LHC
Full text linkIn this paper, a brief overview of the principal strategies for Supersymmetry searches with ATLAS detector at LHC is presented. The aim is to evaluate the
ATLAS discovery potential in inclusive channels with early data with particular attention to the more interesting techniques to estimate the principal SM backgrounds
using real data
Supersymmetry discovery potential in the 2 leptons channel with ATLAS
Full text linkThe main argument of the PhD thesis is the evaluation of the ATLAS detector potential to discover Supersymmetry and to estimate the masses of the supersymmetric particles produced in events with two isolated leptons (electrons or muons) in the final state. The Supersymmetry (SUSY) is one of the most credited theories to extend the Standard Model (SM). This theory foresees a new class of particles that can be detected reconstructing their decay chains. Under some basic assumptions that define the mSUGRA model, all these chains finish with the Lightest SUSY Particle (LSP) that is stable, neutral and weakly interacting: a good candidate for the Cold Dark Matter. The LSP escapes the detection originating a large amount of missing energy in the detector. Within the mSUGRA model, this channel is then characterised by the presence of two isolated leptons, missing energy and energetic jets. A strategy to estimate the SM background in this channel using only real data has been developed allowing the discovery of SUSY already with 1 fb-1 of data collected if the mass of squarks and gluino is about 400 GeV/c2. A technique to extract some information on the SUSY mass particles spectrum using the two reconstructed leptons has also been developed, reconstructing the decay of SUSY particles in order to point out the characteristic edge in the di-lepton invariant mass distribution that allows to extract information about the masses of the SUS Y particles involved in the decay chain
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
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