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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
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
The Cavitation Behavior of Inconel 690 Alloy
No full text摘要
Inconel 690合金是現今工業界中用於高抗蝕性、高強度需求的環境中，相當重要的構件材料之一。然而在以Inconel 690合金為構件材料的設備中，除了有發生應力腐蝕(SCC)以及粒界應力腐蝕(IGSCC)之虞，窩蝕(cavitation)所造成的破壞也扮演著相當重要的角色，本研究便是針對Inconel 690合金的窩蝕(cavitation)破壞現象作一定點的連續觀察，進行窩蝕試驗前，先藉由金相試驗、硬度量測、X-ray繞射等鑑定分析Inconel 690合金之顯微組織及基本性質，而後進行窩蝕試驗，並針對晶界、雙晶、析出物等位置作定位，每隔一固定的時間連續觀察其受窩蝕破壞的情形，了解Inconel 690合金的窩蝕破壞機構。
實驗結果顯示Inconel 690合金的窩蝕破壞起始於晶界、雙晶、及析出物與基材之界面，此外亦有孔蝕( Pitting)的發生，實驗也發現在窩蝕初期有加工硬化現象發生。而對照其窩蝕破壞的階段可以發現在潛伏期階段(incubation period)主要是小尺寸的氮化鈦析出物破壞剝落、孔蝕產生的小坑穴及晶界處塑性變形的小區塊剝落，因此造成的材料損失率很小，但隨著窩蝕時間的增加，潛伏期階段產生之小坑穴逐漸擴大損失的區域，進入加速期(acceleration period)後，破壞的形式變成是大的坑穴相互連結使材料呈塊狀剝落，造成加速期大量材料的流失。此外，析出物的尺寸大小對其抗窩蝕性亦有所影響，過大或過小的尺寸在潛伏期便會遭破壞，存在一適當的析出物尺寸對抗窩蝕性有最佳的效果。Abstract
Inconel 690 alloy is an important material which is used in environment that needs high erosion resistance and high strength. However , in some equipments that use Inconel 690 alloy as components, besides SCC and IGSCC phenomenon exist, the fracture that made by cavitation was also plays an important role. This research concerns about the cavitation behavior of Inconel 690 alloy. Before the experiment of cavitation, the metallographic analysis, the hardness, and X-ray diffraction to analyze and identify the microstructure and quality of the bases of Inconel 690 alloy. Next, begining to do the cavitation test, first of all, need make a spot on grain of the boundary, twin boundary, and educt. During the experiment, the condition of cavitation behavior was observed over and over again to understand the mechanism of the cavitation of Inconel 690 alloy.The result shows that cavitation fracture of Inconel 690 alloy occurrs initially at grain boundary, twin, and interface between precipitate and matrix. Besides, pitting also occurrs. The study also finds that work-hardening occurred in the initial stage of cavitation. Comparing to each periods of cavitation, The causes of weight lost in incubation period was the small TiN precipitations come off and the lost of deformation area at grain boundary and twin boundary, the loss ratio was very lightly. But with increasing time of cavitation, the little pits that produced in incubation period became larger. When it come to acceleration period, the causes of weight lost was the big holes mixed together so that to result big pieces lost of material. In addition, the particle size of precipitations is an important factor for cavitation resistance during incubation period. It has a appropriate particle size that has high resistance to cavitation .中文摘要………………………………………………………………..Ⅰ
英文摘要………………………………………………………………..Ⅲ
誌謝……………………………………………………………………..Ⅳ
總目錄…………………………………………………………………..Ⅴ
表目錄………………………………………………………………...ⅥII
圖目錄…………………………………………………………………..IX
第一章 前言…………………………………………………………1
第二章 文獻回顧……………………………………………………3
2-1、鎳基合金之分類………………………………………3
2-2、鎳基合金之強化機構…………………………………4
2-3、鎳基合金之顯微組織………………………………...5
2-4、鎳基690超合金……………………………………...9
2-4-1、合金設計…………………………………………...10
2-4-2、顯微組織…………………………………………..11
2-4-3、物理性質…………………………………………..13
2-4-4、機械性質…………………………………………..16
2-4-5、耐腐蝕性…………………………………………...20
2-4-6、加工性……………………………………………..21
2-5、窩蝕(cavitation erosion)理論………………………..26
2-6、金屬材料之抗窩蝕性……………………………….27
2-6-1、金屬元素對抗窩蝕性之影響……………………..29
2-6-2、機械性質對抗窩蝕性之影響……………………..30
2-6-3、殘留應力對抗窩蝕性之影響……………………..30
2-7、窩蝕的防治………………………………………….31
第三章 實驗方法與步驟…………………………………………..40
3-1、金相實驗…………………………………………….40
3-2、窩蝕試驗…………………………………………….40
3-3、窩蝕破壞觀察……………………………………….41
3-4、硬度量測…………………………………………….42
3-5、重量損失量測……………………………………….42
3-6、X-ray繞射分析…………………………….………..42
3-7、粗度儀……………………………………………….42
第四章 結果與討論………………………………………………..46
4-1、690顯微組織觀察與硬度量測……………………..46
4-2、X - ray繞射分析…………………………………….50
4-3、窩蝕試驗……………………………………………..51
4-3-1、窩蝕重量損失與窩蝕速率量測…………………..51
4-3-2、690合金晶界的窩蝕破壞…………………………53
4-3-3、690合金雙晶的窩蝕破壞………………………...57
4-3-4、690合金TiN析出物窩蝕破壞…………………...61
4-3-4-1、表面存有缺陷之TiN窩蝕破壞………………..61
4-3-4-2、小尺寸TiN之窩蝕破…………………………..68
4-3-4-3、大尺寸TiN之窩蝕破壞(一)……………………73
4-3-4-4、大尺寸TiN之窩蝕破壞(二)……………………79
4-3-5、Pit的窩蝕破壞…………………………………….82
4-3-6、潛伏期、加速期的窩蝕破壞……………
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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