1,721,038 research outputs found
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
Effect of chromium plating and decorative PVD coatings on the corrosion resistance of AA6060 components
No full textFor duplex coatings (plating + PVD) several studies have shown the criticality of rather inaccessible zones like small holes and undercuts for the corrosion damage. Also sharp edges are reported as dangerous zones for their capability of stress localization and, therefore, as cause of premature coating cracking due to inappropriate local stress distribution. In the present study the effect of holes and undercuts present on a component in AA 6060 alloy (fig. 1) obtained using four different mechanical finishing (wet vibratory finishing, dry vibratory finishing, manual polishing and mechanical polishing respectively) and then Ni plated and PVD coated using two different types of coating (Ni/Cr/ZrCN and Ni/Cu/Ni/Cr/ZrCN) have been evaluated in terms of corrosion resistance. The samples characterized by different mechanical finishing have been analyzed by Scanning Electron Microscopy to investigate the surface morphologies next to or inside the holes (fig. 2, fig. 3, fig. 4 and fig. 5). Then the specimens have been coated by decorative Chromium plating (Ni +Cr - nominal depth 20 μm) and by a ZrCN PVD layer (0.4 μm). The so obtained samples have been investigated by a neutral salt fog testing using 5% sodium chloride solution and a pH range of 6.5 to 7.2; the temperature of the salt spray chamber was controlled to maintain 35 ± 2°C according to the ASTM B 117 standard (fig. 6 and fig. 7). The duration of the test ranged from a minimum of 2 hours to a maximum of 24 hours. The Cu interlayer characterizing the Ni/Cu/Ni/Cr/ZrCN coating showed a significant improvement in the corrosion resistance of the coated part. The coating architecture, and in particular the introduction of an interlayer having a coefficient of thermal expansion intermediate between the Al value and the Ni data affected the residual stress distribution as measured using X-ray technique and, therefore had also an effect on the mechanical behavior of the coating as resulted by nanoindentation test. The four different polishing procedures used did not influence the coating adhesion; no particular effect can be also reported in terms of corrosion resistance
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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
Le Corbusier l'éblouissant. Tra slogans e ricerca, indagine sul rapporto mutevole dell'architetto con la luce
No full textkoamabayili/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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