1,721,004 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
The Davisson–Germer experiment
No full textIn this chapter, we discuss the well celebrated Davisson-Germer experiment, that demonstrates the wave nature of the electron. Then, we present the table-top apparatus that reproduces the original experiment. We point out that such experimental set-up is easily usable by students, and it allows to measure the electron wavelength, thus confirming de Broglie’s hypothesis
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
Transport and proximity effect in unconventional ferromagnet/superconductor heterostructures
Full text link2009 - 2010This dissertation collects results of my own work about heterostructures with unconventional ferromagnets
and superconductors. It both introduces the matter by reviewing part of the existing literature
and it includes original results. In particular charge and spin transport in ferromagnet/superconductor
bilayer, Josephson effect in superconductor/ferromagnet/superconductor junctions, and proximity effect
in ferromagnet/triplet superconductor structures are examined. All work has been supervised by Prof.
Canio Noce and Dr. Mario Cuoco from Dipartimento di Fisica “E. R. Caianiello”, Università degli Studi di
Salerno. I have also benefited from collaborations with Prof. Alfonso Romano and Dr. Paola Gentile from
the same department. Part of the work has been supervised by Prof. Asle Sudbø and Prof. Jacob Linder
from Department of Physics, Norwegian University of Science and Technology. I have also benefited from
collaboration with Henrik Enoksen from the same department. [edited by Author]IX n.s
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