1,721,009 research outputs found
Tipi di analisi e modi di investigazione e standardizzazione della moderna diffrazione XRPD
No full textLe rotte di Odisseo Scritti di archeologia e politica di Bruno d'Agostino
No full textRaccolta di Saggi di Bruno d'Agostino, a cura di Matteo D'Acunto e Marco Gigli
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
Fast formation of ripples induced by AFM. A new method for patterning polymers on nanoscale
No full textThe possibility to control the assembly of molecules on a given substrate is particularly important for polymeric systems. Self-assembly of polymer chains on a substrate can be controlled by modifying selectively the chemistry of the substrate surface and/or the polymer itself in order to create patterned polymer films with tailored length scales. A novel tool to change the polymer morphology in order to achieve the requested superficial structures and textures is the atomic force microscopy (AFM). In this paper, we shall demonstrate how to obtain ordered ripple structures induced by an AFM tip on a polymer thin film. It is well known that a polymer surface scanned by a probe tip can change its morphology assuming typical ripple structures. These structures however are expected to be formed for high applied loads (> 10 nN) and after many scanning cycles (> 10). On the contrary, we shall show how to obtain the ripple formation just by a single AFM scan and for relatively low applied loads. Such ripple structures can be modulated and modified by changing the applied load, scanning velocity and angle. In this way, it is possible to obtain sinusoidal structures with suitable amplitude, periodicity and orientation. Beyond the general contribution to the development of nanolithography, the patterns obtained by this method can find many applications in biomaterial polymer science (such as scaffolds for cell proliferation in tissue engineering). (c) 2006 Elsevier B.V. All rights reserved
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
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