1,720,955 research outputs found
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
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
Removal of dyes and bacteria from wastewater using green synthesised metal decorated carbon based materials
Get PDFThesis (M. Sc. (Chemistry)) -- University of Limpopo, 2021Water pollution associated with dyes and bacteria has become a concern to researchers due to lack of quality sanitation. South Africa falls amongst the water scarce countries. Thus, it is important to develop materials that can effectively remove a variety of pollutants such as dyes and bacteria. Titanium dioxide (TiO2) and Zinc Oxide (ZnO) are materials that have been shown to have great potential in removing these pollutants since they have both the antibacterial and photocatalytic properties. However, due to their large bandgap, fast recombination rate, selective activity and the use of toxic solvents during the synthesis, a need was identified to improve these materials. In this study, the use of Monsonia burkeana (MB) plant extract for the synthesis of TiO2 and ZnO was conducted, to ensure that environmentally safe products were produced and to assist in the antibacterial activity. Also, carbon nanomaterials were loaded on these metal oxides to assist with the reduction of the recombination rate and increase the active sites to ensure that an enhanced photodegradation process took place. Green synthesised TiO2 and ZnO as antibacterial agents and photocatalyst were investigated and compared. Moreover, carbon based materials decorated with green synthesised metal oxides for photocatalytic degradation of dyes was also conducted.
In the first section, TiO2 and ZnO nanoparticles were synthesised using MB extract as a reducing agent. The synthesised TiO2 and ZnO nanoparticles were characterised using UV-vis, FTIR, TEM, SAED, SEM, XRD and TGA. These materials were then tested for their antibacterial and photocatalytic potential. From the results, LC-MS and FTIR provided evidence of the compounds, functional groups and elements that contributed to the mechanism of metal oxide formation. The UV-vis of TiO2 and ZnO nanoparticles exhibited absorbance peaks at 327 and 325 nm, respectively, confirming their formation. In support, FTIR showed vibration bands at the fingerprint region belonging to the metal oxides. SEM showed a spherical shape of TiO2 nanoparticles whereas ZnO nanoparticles exhibited a hexagonal shape. Particle size analysis showed that ZnO nanoparticles had a broad size distribution from 5 to 35 nm and TiO2 had a distribution size from 2 to 18 nm. Thereafter, the metal oxides were tested for their antibacterial and photocatalytic activity. Upon testing their antibacterial potential, ZnO nanoparticles were active against all the four bacterial strains, Staphylococcus
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aureus, Pseudomonas aeruginosa, Enterococcus faecalis and Escherichia coli, while for TiO2 nanoparticles, the strains were resistant and only partially active against Escherichia coli. The water samples collected from tap, sewage, pond and river were tested for their presence of total pollution, Escherichia coli, total coliform and Enterobacteriaceae strains. TiO2 nanoparticles inhibited most of the strains compared to ZnO nanoparticles. For photocatalytic degradation using Methylene blue (MB) as a model pollutant, the TiO2 nanoparticles showed a higher photocatalytic activity than ZnO nanoparticles with a percentage degradation of 85.5% and 61.3%, respectively. The optimum degradation was obtained at pH (10), dosage (60 mg), concentration (20 ppm) and time (120 min). For reusability, the stability behaviour of TiO2 and ZnO nanoparticles gradually decreased with an increase in the number of testing cycles. To improve the activity of TiO2 nanoparticles, carbon based materials (Carbon spheres (CSs) and Carbon nanofibers (CNFs)) were loaded with 5, 10 and 20% of TiO2 and tested for their photocatalytic activity. The 20%TiO2/CSs composite, degraded 88.5% of MB in solution at 120 min. The addition of a low bandgap material, CuO on to the composites (TiO2/CNFs and TiO2/CSs) did not improve the photocatalytic degradation of MB. This study has shown that low cost and safe materials can be produced and can be used to inhibit and degrade various pollutants
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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