1,721,130 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
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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What Lies Discarded: Search for new physics from Long- Lived Particles in the ATLAS detector
Full text linkAt the record-breaking energies of today’s particle accelerators many types of new
particles are expected to be observable. However, since 2012, no new particles have
been discovered. We suspect the particles we are looking for could be long-lived
particles (LLPs), for which the detectors were not designed for. The signals from protonproton
collisions received by the calorimeters in the ATLAS detector at the Large
Hadron Collider at CERN are converted into meaningful information about the particles
through a process called reconstruction. The reconstruction at ATLAS is done by
assuming most of the points in space where a parent particle decays into its daughter
particles, called decay vertices, are within 15 centimetes of the center of the 25 meters
wide detector. However, LLPs, as they are long-lived, have displaced decay vertices,
which leads to LLP signals either being reconstructed inaccurately or discarded as
uninteresting data. To reconstruct those LLP decay vertices, an algorithm was designed
which used cell-level information of the calorimeter as its input. The algorithm was
tested on simulations of Higgs bosons decaying into two photons at various positions in
the detector. The distance between the decay vertex from the simulation (truth) and the
decay vertex from the algorithm (candidate) was compared to the distance between the
truth vertex and the decay vertex from the standard reconstruction (primary). If the
candidate vertex was found 50-75 cm from the origin and within 25 cm from the beam
pipe, or if it was found in the outer regions of the Inner Detector, i.e, the candidate
vertex had 50 cm < |z| < 115 cm, or 75 cm < | r | = \sqrt{x^2 + y^2} < 115 cm, then there
would be an 80 percent chance of d(candidate,truth) < d(primary, truth). This will
translate to higher chances of observing statistically significant signals of LLPs when the
sample size is increased many-fold.Physic
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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Displaced Diphoton Vertex Estimation using Deep Neural Networks
Full text linkThe ATLAS experiment is a general-purpose particle detector located at one of the collision points at the Large Hadron Collider (LHC) investigating a variety of physics by measuring the particles produced in high energy proton-proton collisions.
Long-lived Particles (LLPs) are a class of exotic, hypothetical particles that are characterized by a comparatively long lifetime that allows them to travel a significant distance inside the ATLAS detector before decaying. LLPs are particularly interesting because they arise naturally from many of the most favored theories of new physics, like supersymmetry, but would have evaded detection by previous analyses from the LHC.
This thesis seeks to improve a component of a search for LLPs produced in association with a Z or Higgs boson recently published by the ATLAS collaboration. We present an improved algorithm to find the two-dimensional position of displaced vertices using a Deep Neural Network.Physic
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