1,721,002 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
Quality of Coated Particles: Physical - Mechanical Characterization of Polymeric Film Coatings
No full textAll coated particle producers, when applying the coating layer(s) would like to know precisely what is the best coating system to use in order to answer customer’s requests. It is, therefore, of very high relevance for many industries, to have a clear understanding of what are the parameters I need to trigger in order to generate the requested quality. Such understanding was the target of this work. The specific equipments designed at Delft University of Technology enabled us to measure the resistance to attrition and the resistance to abrasion of both reference coating agents and commercially pre-mixed coating systems. The resistance to attrition was directly related to the intrinsic properties of the coating material, to the process parameters used to apply the coating layer (fluid bed coating in this case) and to the conditions in which the particles are stored. The viscoelastic properties of the coating layers were measured by using nano indentation. Very good correlation between the viscoelasticity term, tan ?, and the resistance to attrition was found. Cast and sprayed films were produced as representation of the coating film. The morphology and the structure of coating layers were mimicked much better by sprayed films which could be obtained by novel equipment designed during this work. To assess the quality of the coating layer and determine how efficient the coating process was, X-Ray micro tomography in combination with image analysis was used. This gave us a very robust set of data which could be used to correlate the quality of the coating layer to the parameters chosen during coating process and those two with the final performance of the coated particles in respect of resistance to attrition/abrasion. Finally commercially available pre-mixed coating systems were used as case study. By comparing them with the reference coating agents we could proof and quantify how important are the additives, plasticisers in primis, in increasing the coating quality and, therefore, the resistance to mechanical stresses.Chemical Engineering, ChemEApplied Science
[Historical development of exodontia (2)]
No full textViene proposto un dettagliato excursus delle tecniche e dello strumentario utilizzati per l'estrazione dentaria dal v secolo ai tempi più moderni
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
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