1,720,967 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
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
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
An ATR-FTIR and ESEM study on magnetic tapes for the assessment of the degradation of historical audio recordings
No full texttThis article presents some approaches for chemical and physical characterization of materials (ATR-FTIR and ESEM) applied to a specific category of cultural material, magnetic tapes. Analogue recordingon magnetic tape has been the main technique for capturing sound for about five decades in the pastcentury. Most of our collective memory is therefore stored on this type of medium, which is unfortunatelydegrading very fast. The past twenty years have witnessed a true rush to digitization in order to savethe information stored on tape, but many aspects of the physical recovery of damaged carriers are stillperformed without solid scientific knowledge, leaving space for improvised treatments with unexpectedill effects. The main motivations for this study are that the preservation of sound recordings is an urgentmatter that belongs to the field of Intangible Cultural Heritage preservation, the scientific literature on thesubject is scarce and little known by the non-scientific archival world, and the documented approaches totapes recovery are currently fragmented and do not provide an exhaustive reference for the operators inthis field. The analyses presented in this article aim at paving the way for the establishment of a scientificprotocol for the safe recovery of damaged tapes
Zeolitic Inorganic-Organic Polymer Electrolytes: A Material Based on Poly(ethylene glycol) 600, SnCl4 and K4Fe(CN)6
No full textThis report describes the synthesis of a new zeolitic inorganic-organic polymer electrolyte with the formula [FexSny(CN)zCl-v(C2nH4n+2On+1)K-1] based on poly(ethylene glycol) 600, SnCl4 and K-4[Fe(CN)6], and is obtained via a sol-->gel transition. Mid and far Fourie than form infrared (FT-IX) studies, analytical data and X-ray Photoelectron spectroscopy (XPS) investigations allowed us to conclude that this material is a mixed inorganic-organic network in which Fr and Sn are bonded by CN bridges and tin atoms by PEG 600 bridges. Mid-infrared (MIR) FT-IR investigations demonstrated that the polyether chains assume a conformation of the TGT (T = trans, G = gauche) type.
Micrographs of the compound obtained by scanning electron microscopy reveal that ifs morphology resembles a smooth gummy paste. The conductivity of the material at different temperatures was determined by impedance spectroscopy (IS). Results indicated that the material conducts ionically and that its conductivity is strongly influenced by segmental motion of the polymer network Finally, this network shows a conductivity of ca. 3.7 x 10-5 S/cm at 25°C
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