1,720,996 research outputs found
Chauvin, R. — Traité de biologie de l'Abeille. Paris, Masson, 1968
No full textBourlière François. Chauvin, R. — Traité de biologie de l'Abeille. Paris, Masson, 1968. In: La Terre et La Vie, Revue d'Histoire naturelle, tome 22, n°3, 1968. p. 361
Chauvin R. — Vie et mœurs des Insectes. Paris, Payot, 1956. Bibliothèque scientifique
No full textBourlière François. Chauvin R. — Vie et mœurs des Insectes. Paris, Payot, 1956. Bibliothèque scientifique. In: La Terre et La Vie, Revue d'Histoire naturelle, tome 10, n°3-4, 1956. p. 293
Chauvin (R.)— Quelques tendances récentes de la zoopsychologie anglo-saxonne ou des précautions à prendre dans les expériences. J. de Ps., 1964, n°1, pp. 39-50
No full textChauvin (R.)— Quelques tendances récentes de la zoopsychologie anglo-saxonne ou des précautions à prendre dans les expériences. J. de Ps., 1964, n°1, pp. 39-50. In: Bulletin de psychologie, tome 23 n°284, 1970. p. 712
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
Aromaticity of ring carbo-mers of [N]annulenes and [N]cycloalkanes
No full textMaps of current density induced by a perpendicular external magnetic field are calculated at the ipsocentric CTOCD-DZ/6-31G**//B3PW91/6-31G ** level for ring carbo-mers of [N]-annulenes (closed-shell singlet states of C3NHqN, N = 3 to 7, with q = -1, 0, +1, 0, -1, respectively, and also the triplet ground state for N = 4) and of [N]-cycloalkanes (C3NH2N, N = 3, 4, 5). Strong four-electron diatropic ring currents indicate conventional π aromaticity for all the singlet and triplet carbo-[N]annulenes studied, with the exception of C12H4, where instead the strong two-electron paratropic ring current is the signature of π antiaromaticity. The carbo-[N]cycloalkanes (also known as [N]pericyclynes) show only localized π currents, consistent with non-aromaticity. There is no indication of a 'homo-aromatic' ring current attributable to the in-plane π orbitals of the inserted C2 units in any of the maps. Consequences for the interpretation of ELF (electron localisation function) populations are discussed. © the Owner Societies
Arene vs. Alkene Substrates in Ru-Catalyzed Olefin Metathesis: a DFT Investigation
No full textDFT calculations have been performed to compare metathesis of olefin, diene, and arene substrates catalyzed by a 2nd generation Ru(SIMes)-based complex. A large screening of modified substrates has been performed with the intention to explore the energetic gaps between acyclically conjugated alkenes and arenes in metathesis processes. The results are analyzed through the effects of conjugation vs. aromaticity, as quantified by the HOMA and NICS aromaticity indices, as well as the effects of non-covalent interactions between coplanar rings and/or any ring with functional groups nearby
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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