1,720,970 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
Syngas production from ethanol dry reforming over La and Ce promoted Co/Al2O3 catalysts
Get PDFEthanol dry reforming has been emerged as a promising route for converting the renewable ethanol and undesirable greenhouse gas (CO2) to industrially recognized syngas. It can also be used as feedstock for downstream methanol production and Fischer-Tropsch synthesis. However, the carbonaceous deposition during ethanol dry reforming process leads to deactivation of the catalyst. Therefore, the Co-based catalysts were prepared with La and Ce promoters using a wet impregnation method and investigated the physicochemical attributes of 10%Co/Al2O3 as well as evaluated the effect of operating parameters on the catalytic activity of ethanol dry reforming reaction in a quartz fixed-bed reactor. In addition, the effect of different ceria loading (from 2% to 5%) was evaluated for ethanol dry reforming reaction at 973 K and stoichiometric conditions. The results revealed that the 3% Ce-promoted catalyst showed the highest activity and resistance from coke deposition. The 3%Ce-promoted catalyst was compared with 3%La-promoted and unpromoted catalyst at different C2H5OH:CO2 ratios of 2.5:1-1:2.5 and reaction temperature of 923 to 973 K. The 3%La over bare 10%Co/Al2O3 significantly improved the metal dispersion (about 16.6%) and degree of reduction (98.3%). Besides, C2H5OH and CO2 conversions increased up to 150.6% and 55.5%, respectively with growing reaction temperature from 923 to 973 K due to the endothermic character of ethanol dry reforming reaction. In addition, both reactant conversions increased with rising CO2 partial pressure from 20 to 50 kPa for all catalysts while, the decreasing reactant conversions with increasing C2H5OH partial pressure. In ethanol dry reforming runs, H2/CO ratio was always higher than unity due to the presence of side reaction (ethanol dehydrogenation). Irrespective of reaction conditions, La-promoted catalyst seemed to be the best catalyst in terms of both C2H5OH and CO2 conversions. Reactant conversions of catalysts increased in the order; 10%Co/Al2O3 < 3%Ce-10%Co/Al2O3 < 3%La-10%Co/Al2O3 catalysts for all operating conditions. The 10%Co/Al2O3 and 3%La-10%Co/Al2O3 catalysts were examined for longevity tests in ethanol dry reforming and showed that the 3%La-10%Co/Al2O3 catalyst exhibited the high catalytic activity than that of unpromoted catalyst at stoichiometric condition for 72 h and 973 K. Furthermore, La-promoted catalyst was regenerated with three cycles and plotted with time-on-stream at stoichiometric feed composition for 90 h and T = 973 K. The results found that the 3%La exhibited the highest catalytic performance in terms of activity and carbon deposition compared to the counterpart unpromoted catalyst. The heterogeneous nature of deposited carbons (carbon nanofilament and graphite) on spent catalyst surface was evident spent catalyst characterizations. Additionally, the 3% La promoter reduced the carbon formation from 51.49% to 30.06%. Furthermore, from the power law expression found that the activation energy for Ce- and La-promoted catalysts (about 98 kJ mol-1 and La-promoted 93 kJ mol-1, respectively) was smaller compared to unpromoted 10%Co/Al2O3 catalyst (about 108 kJ mol-1). The Langmuir-Hinshelwood rate expressions also suggested that both reactants (C2H5OH and CO2) were associatively adsorbed on single-site of catalyst with corresponding activation energy of about 106 kJ mol-1. This study suggests that the syngas produced over Co-based catalysts with desirable H2/CO ratios could be used directly in Fischer-Tropsch synthesis without the requirement of adjusting feedstock composition
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
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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