1,721,066 research outputs found
Libertà e giustizia sociale
No full textProblematiche morali nelle diuscussioni tra scienza e politica
Indurimento superficiale di lega Ti-6Al-4V mediante trattamento termico di diffusione di strati di Ni-B
No full textSalsomaggiore, Ed. AIM Milan
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
Pitting corrosion of surgical instruments in disinfectant environments
No full textThe reusable surgical instruments are subject by law to treatments of disinfection and decontamination. Corrosion, although minimal, during these treatments is inacceptable and therefore it is necessary to pay great attention to the choice of materials with which the tools are built and in the composition of disinfecting agents. The main constituents of detergents for disinfecting and decontamination of surgical instruments are quaternary ammonium salts, and organic acids such as peracetic acid. The reusable surgical instruments are manufactured, according to the standard specification DIN EN ISO 7153-1, with stainless steels 304,316 and 420. However the chloride ions present in disinfecting solutions can produce pitting corrosion on stainless steel surgical instruments. This study is a collaboration between the Department of Industrial Engineering of the University of Padua and a company in Padua that produce detergents and disinfectants bactericidal and virucidal. The main goal of the work is to determine the corrosive action of various formulations of detergent and to seek an appropriate inhibitor, compatible with the disinfectant, which is effective in increasing the resistance to pitting corrosion. Two different formulations called F1 and F2 were after compared. The first, called F1, contain chlorides and an various amounts of an inhibitor, while in the second, called F2 the chlorides have been replaced with the amines and no inhibitors were added. The results show that the presence of the inhibitor cause an increase in the resistance to pitting corrosion but also that the best choice is to replace the chloride ions with amines. Corrosion resistance was evaluated with potentiodynamic polarization tests, immersion tests and electrochemical impedance spectroscopy (EIS) tests
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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