1,720,957 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
The catalytic oxidative dehydrogenation of n-octane over iron and other metal molybdates
Full text linkThis work studies the gas phase oxidative dehydrogenation (ODH) of n-octane to produce octenes, catalysed by metal molybdates of the formula AMoO4, where A equals iron, cobalt or nickel in the +2 oxidation state. An in-situ reduction study from previous work had shown that iron molybdate where iron is in the +2 oxidation state is
a superior catalyst to an iron molybdate catalyst with iron in the +3 state. This was tested and found to be the case. Subsequently all iron molybdate catalyst testing was
performed with iron molybdate where iron is in the +2 oxidation state. This was achieved through a pre-reduction step in catalyst preparation.
The pre-reduced iron molybdate catalyst with a 2.7:1 molar excess of molybdenum to iron was found to be composed of the species FeMoO4 + Mo4O11. This catalyst exhibited high selectivity to octenes from an n-octane feedstock at 400 °C in a plug flow reactor. Changes in gas hourly velocity (GHSV) and temperature (ranging from 350-550 °C) affected catalyst activity and selectivity, as did varying the ratio of carbon to oxygen in the gas feed.
Optimum conditions for the production of octene were found to be; 400 °C reactor bed temperature, 4000 h-1 GHSV and an 8:1 carbon to oxygen ratio, no carbon oxides were observed at these conditions. Increasing temperature results in higher conversion of n-octane but lower selectivity to octenes. Aromatic species become the major products at higher temperatures. Carbon oxide selectivity also rises with temperature.
Increasing partial pressure of oxygen in the gas feed leads to higher conversion but the major products formed are carbon oxides. Lowering the level of oxygen from an 8:1
carbon to oxygen ratio saw lower conversions with similar selectivity. This suggested oxidative dehydrogenation was occurring.
Lowering the GHSV from 4000 h-1 to 1000 h-1 resulted in product selectivity to aromatic species, ethyl benzene, xylene and styrene. Higher conversion as a result of greater
contact time between catalyst and product was observed. Styrene and xylene selectivity increased in line with temperature, while selectivity to ethyl benzene fell,
suggesting a competing pathway between aromatic formation, or that ethyl benzene underwent further dehydrogenation to styrene.
Increasing GHSV to 6000 h-1 resulted in an even greater selectivity to octenes than 4000 h-1. However conversion was lower, likely due to contact time effects. These
findings suggested that the product selectivity from n-octane over an iron molybdate catalyst has a strongly kinetic element.
Increasing the concentration of n-octane in the gas feed showed a shift in the optimal conditions for the production of octene. A higher GHSV was required to yield octenes
as the dominant product, this had the unfortunate effect of lowering conversion percentage. While this was off-set in some way by the increased concertation of noctane it does suggest future difficulties on scaling up the process.
Time on line studies showed the catalyst was stable at temperatures of 550 °C for 20 hours or more.
In addition anaerobic studies were carried out on the catalyst were tested to elucidate the mechanism of the catalyst. The change in selectivity and activity showed the
catalyst most likely operates by a Mars and van-Krevelen type system. After oxygen deprivation for 25 hours catalyst deactivation occurred. Analysis showed both carbon
laydown and reduction of the molybdenum lattice from Mo4O11 had occurred.
Product selectivity analysis indicated that lattice oxygen from the iron molybdate or the bulk Mo4O11 phase was responsible for the ODH of n-octane to octene. Carbon
oxides were formed via oxygen in the gas feed.
Stoichiometric nickel molybdates and cobalt molybdates were prepared and compared against nickel and cobalt molybdates with a molybdenum molar excess of 1.5:1 for the
catalytic conversion of n-octane to octene. These catalysts were then compared against stoichiometric iron molybdate (FeMoO4) to compare catalytic effectiveness.
Iron molybdate outperformed nickel molybdate and cobalt molybdate which have been more heralded ODH catalysts in the literature. Cobalt molybdate was found to exhibit high selectivity to aromatic species while nickel molybdate produced carbon oxides and cracked hydrocarbon products. Nickel molybdate and cobalt molybdate with an excess of molybdenum performed better as catalysts than stoichiometric
nickel and cobalt molybdates
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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