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
Effects of cyclic cryogenic and gas injection treatments on shale rock physical and mechanical properties and their application to improve shale hydrocarbon recovery
Full text linkAdvanced technologies in drilling and hydraulic fracturing operations have unlocked the hydrocarbon production from shale oil/gas reservoirs at economical rates. However, only a small fraction of hydrocarbon is recovered, leaving behind the massive unrecovered hydrocarbon in the formation. Typically, the hydraulic fracturing operation relies on water-based fracturing fluid (e.g., slick-water), where several risks are imposed to the environment and reservoir, including but not limited to, extensive water consumption and formation damage. To minimize these concerns, waterless stimulation methods are being investigated. One of the most promising waterless stimulation methods is the thermal shock technique, especially cryogenic treatment (e.g., liquid nitrogen (LN2)). The efficiency of a cryogenic treatment depends on several factors, such as rock properties, temperature differential, and the treatment cycles. Additionally, the degree of success of the LN2 depends on the external injection pressure, where the vaporization of LN2, without applying any external pressure, may not provide adequate pressure to extend the induced cracks. Despite the remarkable progress among the researchers, cryogenic treatment needs further attention to understand its potential in the oil and gas industry.
This research consists of three major objectives. The first purpose is to investigate the physical and dynamic elastic properties of 24 outcropped Eagle Ford core samples considering some essential experimental parameters, where five different experiments were conducted. The second objective is to experimentally investigate the performance of LN2, as cryogenic fluid, on reservoir-temperature outcropped Eagle Ford and reservoir-depth Wolfcamp core samples in stimulating and inducing fractures. Also, the goal is to investigate the effects of cyclic LN2 treatment on the rock physical and mechanical properties of Eagle Ford samples. Since the degree of success of the LN2 depends on the external injection pressure, the third objective of this research is to use LN2 treatment in conjunction with the cyclic gas injection to provide the external injection pressure and improve the shale oil recovery. For this purpose, initially, outcropped Eagle Ford core samples with synthetic mineral oil were used to examine the performance of combining LN2 treatment with cyclic nitrogen (N2) injection. Next, the feasibility of using LN2 combined with cyclic N2 and/or carbon dioxide (CO2) injections in improving shale oil recovery using downhole core samples and dead crude oil from the Wolfcamp formation were investigated experimentally.
The findings of this study provide detailed information about the rock-physical and dynamic-elastic properties of one of the largest unconventional resources in USA, the Eagle Ford formation, where direct measurements may not be cost-effective or feasible. Also, this research showed that cyclic cryogenic treatment increases porosity and permeability and decreases ultrasonic velocities of the samples resulting from inducing new cracks and extending and widening the existing ones. Most of the alterations in the properties (porosity, permeability, and ultrasonic velocities) of the core samples occur after completing the first cycle of the treatment. Additionally, permeability enhancement was noticeable (up to 2 orders of magnitude) compared to the porosity and ultrasonic velocity results. The findings of this study also revealed that LN2-assisted N2 and/or CO2 huff-n-puff improved the Eagle Ford and Wolfcamp shale samples recovery factor (RF), where flow-conductivity enhancement, induced-cracks growth, and oil-gas interaction development throughout injecting-soaking-producing stages enhance the stimulated volumes and improve the oil RF. The results demonstrated that higher cumulative oil RFs with fewer cycles were achieved compared to the previous experimental cyclic gas injection works carried out on Eagle Ford and Wolfcamp core samples. A combination of cryogenic treatment and huff-n-puff techniques could be potentially implemented in shale oil reservoirs, opening the opportunity to improve shale oil RF by enhancing the flow conductivity and increasing hydrocarbon mobility.Restricted until 06/2023. To request the author grant access, click on the PDF link to the left
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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