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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
Study of Grating Based Side-coupling Technology for High Power Laser Diode Array
No full text近年來，利用半導體雷射激發之光纖雷射逐漸成為高功率雷射主流，藉由光纖輸出，此種雷射具有極佳的光束品質、窄線寬及高電光轉換效應等優點。半導體雷射陣列是一種可靠的高功率雷射激發光源，並且廣泛地使用在各種雷射幫浦應用上。本實驗室於2011年提出半導體雷射陣列之側向式光柵耦光系統，將976-nm 半導體雷射陣列耦入內纖衣尺寸為400 μm光纖，其輸出功率為21瓦並達到50%耦光效率，但該研究提及第二次繞射效應所造成之耦光效率損耗，將使得光源要耦入更小內纖衣尺寸之光纖更為困難。 因此在本論文中，主要將光柵週期改變至675 nm，在內纖衣尺寸為400 μm時，可以減少第二次繞射效應以提高耦光效率達至67.63%，將光纖內纖衣尺寸縮小至250 μm，其耦光效率可接近光源以680-nm光柵耦入400-μm內纖衣光纖，因此提升光纖輸出亮度2.36倍；另外引用基因演算法方式，可以提供設計光柵及優化之方向，如解決第二次繞射損耗及折射率匹配液損耗等問題。在本論文中，利用基因演算法設計出光柵之±1st 階繞射效率呈現非對稱型態，並以增強+1st 階繞射效率解決折射率匹配液帶來之損耗。此外，本論文將討論系統結構參數與光學架構因素損耗之關係，以達到高亮度、高功率輸出之光纖雷射側向耦光系統。In recent years, diode-pumped fiber lasers have become main-stream in the high-power laser field, owing to their superior beam quality, narrow linewidth, and high electrical-optical conversion efficiency. Besides, laser diode array (LDA) is a reliable high-power pump source, and it has been widely used in many applications. In 2011, we have demonstrated a side-coupling scheme, a 50% coupling efficiency was achieved by using 680-nm period gold-embedded grating to couple 21-W, 976-nm LDA pump source into a 400-μm double-clad passive fiber. But in such a system, there was coupling loss caused by the secondary diffraction. The issue made it harder to couple pump source into a small cladding fiber. In this work, we achieve 67.63% coupling efficiency into a 400-μm fiber by using a 675-nm grating. In addition, even using the fiber with the cladding diameter to 250 μm, the coupling efficiency is as good as the above mentioned case. In this result, the brightness has been enhanced by a factor of 2.36. Secondly, we introduce a genetic algorithm to optimize the grating coupling efficiency by eliminating the secondary diffraction and index-matching-gel coupling loss. We design an asymmetrical ±1st-order-diffraction-efficiency grating to increase +1st order diffraction efficiency, and reduce the coupling loss caused by the use of index-matching gel. Finally, we discuss the correlation between coupling loss issues and system structure parameters to achieve a high brightness, high power fiber laser output with a compact side coupling system
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
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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