1,720,985 research outputs found
Uniqueness Of Centaouro-type Events
No full textAnalysis to discriminate Centauro events from normal events is made without previous identification of secondary emitted particles. For this purpose their energy and derived quantities like distance from the center of momenta it were mainly used. As a result we found in a sample of (280+87) experimental events only 3 were compatible with 5 Centauro events, but none of them had a high content of hadrons, characteristic of Centauro events. With this result we are confident about the uniqueness of Centauro events, especially for two events that have vertex directly determined. Comparing with some interaction models features we depict a possible scenario to explain Centauro events.122197200Pancheri, G., Rubbia, C., (1984) Nucl. Phys., A418, p. 117Gaisser, T.K., Halzen, F., (1985) Phys. Rev. Lett., 54 (16), p. 1754(1989), p. 327. , B-J Collaboration, 41th Brazilian Society for Promotion of Science, Fortaleza-Ceará(1989) and 10th Brazilian National Meeting on Particle and Fields, Itatiaia-Rio de JaneiroAugusto, C.R.A., Barroso, S.L.C., Beggio, P.C., Carvalho, A.O., Menon, M.J., Navia, C.E., Oliveira, R., Shibuya, E.H., (2001), p. 1422. , (BRAZIL-JAPAN COLLABORATION OF CHACALTAYA EMULSION CHAMBER EXPERIMENT), Proc.27th ICR Hamburg, HE300Augusto, C.R.A., Barroso, S.L.C., Beggio, P.C., Carvalho, A.O., Menon, M.J., Navia, C.E., Oliveira, R., Shibuya, E.H., (2001), p. 1537. , (BRAZIL-JAPAN COLLABORATION OF CHACALTAYA EMULSION CHAMBER EXPERIMENT, Proc.27th ICR Hamburg, HE3.0
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
Identification Of Hadrons In Centauro Events
No full textSince the observation of a remarkable cosmic ray induced event, in experiments with emulsion chambers, a search for similar events was started. In spite of no observation of events showing the unusual aspect of Centauro I, another remarkable event with a high content of hadrons was observed. Moreover, this Centauro V has a hadron that interacts twice at deeper layers of the detector and has energy between (16-20)% of the total energy of the main interaction, the former figure for all showers and the last only for hadron-induced showers. Therefore, to classify it as a Centauro type event it is crucial to look for reasonable criterion to identify hadronic particles. Previous analysis adopted only one criterion for each shower observed in the films. Nowadays, an improved re-analysis uses at least two criteria for each shower. The main purpose of this paper is to show that the showers observed are properly identified as of hadronic origin and so we conclude that is an authentic Centauro event produced by the interaction of a hadron 500 m above the detector and interacting twice in the lower part of the chamber.122193196Augusto, C.R.A., Barroso, S.L.C., Beggio, P.C., Carvalho, A.O., Menon, M.J., Navia, C.E., Oliveira, R., Shibuya, E.H., (Brasil-Japan Collaboration of Chacaltaya Emulsion Chamber Experiment), uniqueness of Centauro-type events, submitted to this symposium.)(1971) Prog. Theor. Phys. Suppl., 47, p. 1. , Brasil-Japan Collaboration of Chacaltaya Emulsion Chamber ExperimentLattes, C.M.G., Fujimoto, Y., Hasegawa, S., (1980) Phys. Rep., 65, p. 151(1983) Prog. Theor. Phys. Suppl., 76, p. 1. , Brasil-Japan Collaboration of Chacaltaya Emulsion Chamber ExperimentPancheri, G., Rubbia, C., (1984) Nucl. Phys., A418, pp. 117cAlexopoulos, T., (1988) Phys. Rev. Lett., 60, p. 162
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
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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