1,721,034 research outputs found
Strong Emission of Particulates Towards the Incident Beam Direction in Pulsed-Laser Ablation Experiments
No full textDetailed Studies of the Plume Deflection Effect During Long Laser Irradiation of Solid Targets
No full textThe role of the adsorbed gases on the photoelectron performance of Mg-based photocathodes
No full textThe influence of the adsorbed gases on the photoelectron performance of Mg thin film-based photocathodes was investigated. Mg thin
films were deposited on Silicon and Copper substrates by pulsed laser ablation technique. The samples deposited on Silicon substrate
were used to deduce the morphology, the structure and the thickness by using different diagnostic techniques. On the contrary, the
samples deposited on Copper substrate were tested as photocathodes in a DC photodiode cell. The quantum efficiency of the Mg
photocathodes was systematically improved by laser cleaning treatments, which appears to be necessary before any use of a metallic
photocathode. The role of the hydrogen and oxygen absorption process on the emission properties is presented and discussed
Plume Separation Effect in Pulsed Laser Ablation Deposition
No full textThe results of a new geometrical configuration of pulsed laser ablation deposition technique that uses a hemicylindrical transparent plastic substrate are presented and discussed. * * * * * * * * * * * * * *
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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