1,720,988 research outputs found
EXPERIMENTAL CHARACTERIZATION OF HEMP WOVEN FABRIC REINFORCED EPOXY RESIN COMPOSITES PRODUCED WITHOUT HEAT TREATMENT
Get PDFIn the field of composite materials there is growing emphasis on environmental impacts, resulting in the replacement of synthetic-based components with bio-based components, and in particular, attention to the production process. The focus of the paper is the production of a composite reinforced with natural fibers, which can find applications in the construction field as the reinforcement of wooden structural elements, or as a skin for boards or sandwich panels. In this sector, it is not neces-sary to achieve very high mechanical performance as in the automotive sector. On the other hand, the cost of the product must be kept low and the production process simple. The proposed composite was prepared with an epoxy resin matrix reinforced with a bidirectional woven fabric made of hemp fibres without any heat treatment. The composites were hand laminated and manufactured by cold moulding to reduce energy consumption. To optimize the behaviour of the composite, various specimens were manufactured, and factors such as the curing pressure, quantity of resin and layer orientation were modified. Tensile strength tests were conducted on specimens according to the ASTM D3039 standard
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Suicidio e riforma psichiatrica. Studio epidemiologico preliminare sul suicidio nella città di Roma del settennio 1976-1982
No full textGli autori hanno preso in considerazione i dati relativi ai suicidi avvenuti nella città di Roma negli anni precedenti l'entrata in vigore della legge 180/78 e quelli relativi ai suicidi verificatisi negli anni successivi. Viene rilevato un incremento costante del fenomeno suicidio a partire dal 1978, ed una vertiginosa escalation del fenomeno dal 1980, ciò induce ad una riflessione sull'effetto destabilizzante sulla popolazione psichiatrica della riforma legislativa
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
EVIDENZE TOSSICOLOGICHE E VALUTAZIONI DELLE PARTI IN UN CASO DI RESPONSABILITA' PROFESSIONALE.
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koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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