1,721,003 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
Detecting non-uniform phosphorus distribution in ancient Indian iron by colour metallography
No full textVariations 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
The iron artefacts of the Amiens Cathedral: in situ EIS measuring campaign for the assessment of the corrosion behaviour
No full textConservation of ferrous artefacts in heritage buildings requires the characterization of the corrosion products in order to understand the atmospheric corrosion mechanisms and to develop tailored, long lasting conservation methodologies. In this study, the corrosion products grown on several iron artefacts exposed to over 500 years in the Amiens Cathedral have been studied by means of electrochemical impedance spectroscopy (EIS). The artefacts, subjected to long time indoor atmos-pheric corrosion, are coated by corrosion products constituted by iron oxides and oxy-hydroxides, such as goethite, lepidocrocite, maghemite, akaganeite, organised in a very complex structure. In situ EIS has been employed to investigate the phenom-ena involved at the electrochemical interfaces among the various corrosion products and to assess and predict their corrosion behaviour. The measurements have been performed by means of a portable EIS analyser specifically designed to work as a stand-alone device, all over a frequency range from 0.001 Hz to 40 kHz and for impedances in the range of 1 k - 10 G. Adhesive and flexible probes with conduc-tive gel have been employed to carry out the impedance measurements without af-fecting the rust layers and the metal surface. The EIS data have been compared with the microchemical and microstructural characterisations of the layer
Misure d'impedenza elettrochimica per lo studio dei fenomeni di corrosione atmosferica di strutture in ferro d'nteresse artistico
No full textI meccanismi di corrosione atmosferica di lungo periodo che interessano le strutture in ferro d'interesse storico-artistico sono stati studiati mediante spettroscopia d'impedenza elettrochimica (EIS). In particolare l'impiego di uno strumento portatile, progettato e realizzato dagli autori, ha permesso di effettuare una campagna di misure in situ su alcuni manufatti in ferro esposti all'interno della cattedrale Notre-Dame di Amiens (Francia), esposta da più di 500 anni alla corrosione atmosferica. Le misure d'impedenza elettrochimica, condotte parallelamente ad una caratterizzazione chimica, morfologica e microstrutturale, possono fornire interessanti informazioni sul meccanismo di degrado, sul comportamento dei diversi composti, essenzialmente miscele di ossidi ed idrossidi di ferro, quali goethite, lepidocrocite, akaganeite, maghemite, ecc, nei confronti del fenomeno corrosivo, sulla presenza di difetti e zone elettrochimicamente attive. In questo modo è possibile prevedere il comportamento a corrosione del manufatto, permettendo ai restauratori la messa a punto di metodologie di restauro specifiche, efficaci e durature
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
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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