1,721,000 research outputs found
Acidi grassi polinsaturi integratori dietetici nella fibrosi cistica
No full text3° Convegno nazionale Acidi grassi OMEGA 3 e antiossidanti. Ancon
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
Corrosion behaviour in concrete of three differently galvanized steel bars
No full textThe increasing use of galvanized steel reinforcements in concrete structures submitted to aggressive environments induces research into innovative zinc coatings with higher corrosion resistance. In this work, several cylindrical concrete specimens were manufactured with two cements of different alkalinity and reinforced with different hot-dip galvanized bars obtained from the “traditional” Zn-Pb bath and from two “modified baths”: Zn-Ni-Bi and Zn-Ni-Sn-Bi. The corrosion rate and corrosion potential of the bars were monitored during the air curing period and during wet-dry exposure both in tap water and in a 5% sodium chloride solution. The results showed that the coatings obtained from Zn-Ni-Sn-Bi bath have the highest corrosion rates, when the aggressiveness of the concrete matrix is determined mainly by its alkalinity. On the contrary, when the corrosion process is determined mainly by the penetration of chlorides (concrete manufactured with cement having a low alkali content) Zn-Ni-Sn-Bi was attacked only when the chloride concentration at the concrete cover depth reached the threshold of 4.02 % (by weight of cement), which is higher than those necessary for the attack of the other coatings studied (1.36 % for Zn-Ni-Bi, 1.73 % for Zn-Pb)
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
Evidenze cinetiche nei meccanismi delle reazioni tra Coproporfirina-I e alcuni ioni metallici. determinazione catalitica di tracce di Hg(II), Cd(II) e Pb(II)
No full textInvestigation on the corrosion resistance of galvanized steel bars in concrete during wet-dry cycles exposure
No full textAtti in CD-RO
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