1,720,953 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
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
Experimental Investigation and Numerical Modeling of Corrosion Induced Expansive Pressure on Concrete Cover in Reinforced Concrete
No full textThis thesis is submitted to the Department of Civil Engineering, Khulna University of Engineering & Technology in partial fulfillment of the requirements for the degree of Master of Science in Civil Engineering, November 2018.Cataloged from PDF Version of Thesis.Includes bibliographical references (pages 90-93).Corrosion of reinforcement is an important durability concern for the structures exposed to adverse weather conditions especially in coastal regions. The volume of corrosion products are much higher than the original volume of the corroding reinforcement, which exerts an expansive pressure on the surrounding concrete and results in cracking of the concrete cover. In this research an investigation was carried out through numerical modeling and experimentation to explore the mechanism of concrete cover cracking due to that expansive pressure. It was aimed that structural health monitoring in terms of level of corrosion might be possible through monitoring the crack width and crack propagation in the cover concrete. In addition a convenient means of corrosion protection was investigated by using zinc as sacrificial anode. A numerical model was developed using a commercial finite element modeling software ABAQUS 6.14 to evaluate the cracking pressure, crack initiation, crack propagation and radial deformation for different cover thicknesses and bar locations. The model was also used to determine the effect of bar diameter on cracking pressure and the patterns of crack for different number of bars. Numerical results were validated by experimental investigation.
The cracking pressure was simulated experimentally by applying hydraulic pressure through a hole in the specimens having similar diameter as of the reinforcement. 150 mm cube specimens for three different grades of concrete with various clear cover and location of bar were used for the simulation. Impressed current technique was used to accelerate the corrosion of reinforcement. Characterization of impressed current technique involved determination of optimum chloride content and minimum immersion time of specimens for which the application of Faraday’s law could be efficient. To obtain optimum chloride content, the electrolytes in the corrosion cell were prepared similar to that of concrete pore solutions. Concrete cubes of 50 mm were used to determine the optimum immersion time for saturation. It was found that the optimum chloride content was 3.5% by mass of water and the minimum immersion time for saturation was 24 hours. Concrete prisms of 250 mm x 250 mm x 300 mm with 12 mm-Ø grade 60 plain mild steel bars were used to simulate RCC beams with various cover thicknesses of 20 mm, 37.5 mm, 50 mm and 75 mm, respectively, to observe the mechanism of crack initiation, propagation and level of corrosion with respect to the width of surface crack. Level of corrosion was measured in mg/cm2 following Faraday’s law and by gravimetric loss method, and width of crack was measured by image analysis.
From numerical modeling it was found that, with the increase of cover thickness the pressure as well as the radial expansion needed to initiate crack was increased. The same pattern was found for both corner bar and side bar. A lower cracking pressure was required for corner bar with respect to side bar. On the other hand, with the increase in bar diameter, a decrease in cracking pressure was observed. It was also found that the crack was initiated from outer surface and propagated towards the steel concrete interface for a cover thickness of 20 mm as well as 37.5 mm. This result was accomplished due to heaving of cover concrete and crack initiated when bending stress exceeded the tensile strength of concrete. Whereas for a cover thickness of 50 mm as well as 75 mm, crack was initiated at the steel-concrete interface and propagated towards the cover surface. These observations were further confirmed through experimental investigation. From the experimental simulation of cracking pressure, it was found that the cracking pressure varied linearly with the increase in concrete cover-to-diameter ratio (c/d). The pressure requirement to initiate crack was also higher with higher grades of concrete. For corner bars with cover thickness 37.5 mm, the critical pressure was 6-10 MPa and it increased up to 17 MPa for cover thickness of 64 mm for different grades of concrete. On the other hand, for other bar location with cover thickness of 37.5 mm and 64 mm, the pressure required to initiate crack was about 7.6 MPa and 14.8 MPa, respectively, for C20 grade concrete. A linear relationship was found between crack width and level of corrosion. For cover thicknesses of 20 mm and 37.5 mm, the critical corrosion amount (CCA) needed to initiate crack was about 22 mg/cm2. However, a sudden increase in CCA was noticed when the cover thickness was over 44 mm. For cover thicknesses of 50 mm and 75 mm the CCA values were 129 and 211 mg/cm2, respectively. Cathodic protection of reinforcement corrosion was investigated by using zinc as sacrificial anode in the accelerated corrosion cell with two environments- (i) synthesized solutions similar to concrete pore solution and, (ii) concrete. It was found that up to 65% of the corrosion current could be diverted through the sacrificial anode.
It is concluded that level of corrosion could be predicted by monitoring the surface crack width with reasonable accuracy, a minimum of 50 mm concrete cover should be provided in the corrosion prone environment and zinc as sacrificial anode could reduce as much as two-thirds of corrosion hazard to prolong the service life of reinforced concrete structures.Sheikh ShakibMaster of Science in Civil Engineerin
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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