1,720,960 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Search for the Mini Black Hole in the Multijet Final State in pp Collisions at √ s = 7 TeV
No full textA mini black hole search is motivated by theories of extra dimensions. ADD model is one of extra dimensions theories in which all extra dimen- sions are compactified in cylinder shape. In the model, only gravitational field can propagate into additional n dimensions. Hence, the fundamental gravitational force is stronger than that measured in 3+1 space-time dimen- sions. This could lead the fundamental Planck scale, M D , of O (1) TeV in n + 4 dimensions, and solve the hierarchy problem where the Planck scale is vastly large compared with the electroweak scale. On the assumption of M D ∼ O (1) TeV, mini black holes with masses of O (1) TeV could be pro- duced at the Large Hadron Collider (LHC) at CERN. In this thesis, mini black holes were searched for in a multijet final state in proton-proton collisions at center of mass energy of 7TeV, produced by LHC. The collision data collected by the ATLAS detector in 2010, corresponding to the integrated luminosity of 36 . 3pb − 1 , were used in the search. The mini black hole signals for n = 2 to 7 and M D = 0 . 8 GeV to 2 TeV are searched for. For each n and M D , the mass thresholds of the mini black holes were set by the assumptions that colliding particles collapse in a black hole if the Compton wavelength is equal to or less than the Schwarzschild radius or horizon radius. In case M D = 1 TeV, the assumption with Schwarzschild (horizon) radius gives mass thresholds of about 2(3) TeV to 4(5) TeV for n = 7 to 2. Mini black holes are decaied mainly by the Hawking radiation. The model of no graviton emission is used for the decay of mini black holes. The burst model, in which mini black hole decay into multi-body, is adopted for the Planck Phase when the mass of mini black holes become smaller than the Planck Scale. Observed events are consistent with Standard Model predictions and up- per limits on the mini black hole production cross sections are set. This result can be interpreted to the lower limits on M D for each n by comparing with theoretical cross sections. On the assumption using Schwarzschild (horizon) radius, a lower limit on M D for n = 4 (5) is placed as M D > 1 . 26(1 . 06) TeV , at 95% confidence level, which is the most stringent limit obtained by the collider experiment
Variations on the Author
Get PDF“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
Get PDFWe 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
Get PDFWe 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
External Resources: Clouds and HPCs for the expansion of the ATLAS production system at the Tokyo regional analysis center
Get PDFThe Tokyo regional analysis center at the International Center for Elementary Particle Physics, the University of Tokyo, is one of the Tier 2 sites for the ATLAS experiment in the Worldwide LHC Computing Grid (WLCG). The current system provides 7,680 CPU cores and 10.56 PB disk storage for WLCG. CERN plans the high-luminosity LHC starting from 2026, which increases the peak luminosity to 5 times compared to the present value in LHC. For the high-luminosity LHC, a requirement of computing resources for each site will be increased. To expand the ATLAS production system at the Tokyo regional analysis center, R&D using external resources has been launched. One kind of external resources is a commercial cloud resource, such as Google Cloud Platform and Amazon AWS. Another resource is the High-Performance Computer (HPC) at the University of Tokyo. In this presentation, the current status of the R&D, the systems for these resources and comparisons of the cost will be reported
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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