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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
Development of Efficient Antimicrobial Zinc Oxide Modified Montmorillonite Incorporated Polyacrylonitrile Nanofibers for Particulate Matter Filtration
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Influence of metal oxide nanoparticles on morphological, structural, rheological and conductive properties of mulberry silk fibroin nanocomposite solutions
No full textThis paper highlights about the effect of metal oxide nanoparticles on rheological and conductive properties of silk fibroin (SF) solution. Silk fibroin nanocomposite solutions are prepared using formic acid with the incorporation of metal oxide nanoparticles such as zinc oxide (ZnO), copper oxide (CuO) and, titanium dioxide (TiO2) in formic acid. Even distribution of metal oxide nanoparticles in silk fibroin solutions are observed through HRTEM. The addition of metal oxide nanoparticles to silk fibroin solution suppressed the β sheet conformation and enhanced the random coil conformation as confirmed by Fourier transform infrared spectroscopy. The steady shear analysis showed shear-thinning behavior of silk nanocomposite solutions and are found to be highly influenced by the shear rates. The viscosities of silk fibroin solutions are reduced from 5407 mPa s to 316, 367, and 709 mPa s, on the addition of ZnO, CuO, and TiO2 nanoparticles, respectively at a low shear rate of 0.1 s−1. An oscillatory shear rheology test has been performed to evaluate the dynamics of the viscoelastic behavior of nanocomposite solutions. Silk fibroin/CuO solution is found to be frequency independent as analyzed in oscillatory sweep measurement. In a creep recovery test, pure silk fibroin solution showed delayed elasticity while nanocomposite solutions showed ideal viscous behavior. Rotational (constant low-high-low) shear has been applied to study the structure recovery test. Metal oxide nanoparticles brought better structure recovery in SF nanocomposite solutions. SF/metal oxide nanocomposite solutions show higher conductivity compared to pure silk fibroin solution
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