1,720,982 research outputs found
Cold Plasma Surface Treatments for GFRP Bonding
No full textCold plasma have found unique applications in the surface treatments of polymeric materials but few research has been developed on the treatment of composite materials. In this paper samples of Glass Fibre Reinforced Polymeric have been subjected to cold plasma surface treatment and glued to simulate structural joints. Aim is to improve the surface adhesion. An cold plasma generator working in flow gas (O 2, N 2) has been employed to obtain a localized surface treatments. The strength of double cantilever beam joints has been measured and a morphology fractures analysis of the surfaces has been done. The results show that the cold plasma with oxygen gas under a little time of treatment increase the admissible of project parameters. Morphological analysis permits to evidence different fracture modes to be correlate to the surface treatment parameters
Cold Plasma Surface Treatments for GFRP Bonding
No full textCold plasma have found unique applications in the surface treatments of polymeric materials but few research has been developed on the treatment of composite materials. In this paper samples of Glass Fibre Reinforced Polymeric have been subjected to cold plasma surface treatment and glued to simulate structural joints. Aim is to improve the surface adhesion. An cold plasma generator working in flow gas (O 2, N 2) has been employed to obtain a localized surface treatments. The strength of double cantilever beam joints has been measured and a morphology fractures analysis of the surfaces has been done. The results show that the cold plasma with oxygen gas under a little time of treatment increase the admissible of project parameters. Morphological analysis permits to evidence different fracture modes to be correlate to the surface treatment parameters
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
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