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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
ลักษณะเชิงปริมาณของพืชถิ่นเดียวและสถานการณ์ของชนิดพันธุ์พืชต่างถิ่นรุกรานในป่าชุมชนบ้านศรีสรรเพชญ์ อำเภออู่ทอง จังหวัดสุพรรณบุรี
Get PDFQuantitative Characteristics of Endemic Plant and Situation of Invasive Alien Plant Species in Ban Srisanpet Community Forest, U Thong District, Suphan Buri Province
Sathit Panvilai, Jaran Prajanban and Wichai Pathumchartpat
รับบทความ: 15 มกราคม 2562; แก้ไขบทความ: 8 กันยายน 2562; ยอมรับตีพิมพ์: 10 ตุลาคม 2562
บทคัดย่อ
พืชถิ่นเดียวมีเขตการกระจายพันธุ์ที่ถูกจำกัดโดยปัจจัยของลักษณะทางภูมิประเทศ ลักษณะภูมิอากาศ และชีวปัจจัย ซึ่งพืชมีวิวัฒนาการของการปรับตัวและเจริญในพื้นที่ใดพื้นที่หนึ่งของโลกโดยไม่พบประชากรในพื้นที่อื่น จากการศึกษาความหลากหลายทางชีวภาพในอำเภออู่ทอง จังหวัดสุพรรณบุรี ก่อนหน้านี้พบพืชถิ่นเดียวทั้งหมด 9 ชนิด ประกอบด้วย กะเพราหินปูน จอกหินตะนาวศรี เทียนกาญจน์ ม่วงไตรบุญ มหาพรหม มะกัก มะลิสยาม อรพิม และหุน โดยพืชถิ่นเดียวเหล่านี้ยังไม่ทราบข้อมูลจำนวนประชากรและการกระจายพันธุ์ รวมถึงข้อมูลสถานการณ์การรุกรานถิ่นที่อยู่จากพืชต่างถิ่น ดังนั้นงานวิจัยนี้จึงมีวัตถุประสงค์เพื่อศึกษาลักษณะเชิงปริมาณของพืชถิ่นเดียวและสำรวจประชากรชนิดพันธุ์พืชต่างถิ่นรุกรานพร้อมกับวิเคราะห์สถานการณ์การรุกราน ผลการศึกษาพบว่าพืชที่มีความหนาแน่นและความถี่มากที่สุดคือกลุ่มพืชล้มลุก เช่น ม่วงไตรบุญ จอกหินตะนาวศรี เทียนกาญจน์ นอกจากนี้พืชถิ่นเดียวทุกชนิดมีการกระจายพันธุ์แบบกลุ่มโดยแสดงค่า Id ตั้งแต่ 2.00–20.00 และมีค่า Ip ตั้งแต่ 0.52–1.00 ซึ่งค่าดังกล่าวนี้แสดงศักยภาพของพืชในการกระจายพันธุ์ มะกักเป็นพืชถิ่นเดียวที่มีการกระจายพันธุ์ได้ดี ในขณะที่มะลิสยามมีความสามารถในการกระจายพันธุ์ได้น้อย ซึ่งการกระจายตัวแบบกลุ่มอาจทำให้พืชเหล่านี้มีโอกาสอยู่ในสถานภาพถูกคุกคาม อีกทั้งผลจากการศึกษาสถานการณ์การรุกรานของชนิดพันธุ์พืชต่างถิ่นที่พบในพื้นที่ พบว่า มีการรุกรานของผกากรอง ไมยราบเลื้อย และสาบเสือ โดยผกากรองมีระดับการรุกรานสูงสุดที่อาจส่งผลต่อการคุกคามถิ่นที่อยู่ของพืชถิ่นเดียว งานวิจัยนี้ชี้ให้เห็นว่าข้อมูลลักษณะเชิงปริมาณของพืชถิ่นเดียวและข้อมูลสถานการณ์การรุกรานจากชนิดพันธุ์พืชต่างถิ่นเป็นประโยชน์ที่จะนำไปสู่การวางแผนการอนุรักษ์และการใช้ประโยชน์อย่างยั่งยืนจากพืชถิ่นเดียว
คำสำคัญ: พืชถิ่นเดียว ลักษณะเชิงปริมาณ ชนิดพันธุ์พืชต่างถิ่นรุกราน
Abstract
Distribution of endemic plant is restricted by geographic, climatic and biotic factors. The endemic plant can evolve and adapt to grow in any places by which there is no population elsewhere in the world. According to previous study of biodiversity in U Thong district, Suphan Buri province, there were nine endemic plants, including Plectranthus albicalyx S. Suddee, Dorcoceras glabrum C. Puglisi, Impatiens kanburiensis T. Shimizu, Tribounia venosa (Barnett) D.J. Middleton, Mitrephora winitii Craib, Spondias bipinnata Airy Shaw & Forman, Jasminium siamense Craib, Bauhinia winitii Craib and Cissus craibii Gagnep. subsp. dissecta (Craib) Trias-Blasi & J. Parn. The population and distribution data of these plants as well as situation of habitat invasion from invasive alien plant species (IAPS) have not yet been reported. Therefore, the purposes of this research were to study the quantitative characteristic of endemic plant and to survey the population of IAPS as well as analyze the invasive situation. The result demonstrated that the herbs, e.g. Tribounia venosa, Dorcoceras glabrum and Impatiens kanburiensis displayed the high density and frequency values. Besides, all endemic plants also showed aggregate distribution by expressing Id and Ip values which ranged from 2.00–20.00 and 0.52–1.00, respectively. The Id and Ip exhibited the efficient distribution of plant by which Spondias bipinnata was able to distribute successfully while Jasminium siamense rarely distributed. By aggregate distribution, this may render these plants become the threatened plant. Also, the study of IAPS found that there were invasions of Lantana camara L., Mimosa diplotricha C. Wright ex Sauvalle and Chromolaena odorata (L.) R.M. King & H. Rob. The highest invasive level was Lantana camara which may result to the threatening of habitat of endemic plants. This research indicated that the quantitative characteristics and the data of invasive situation of IAPS are useful which will lead to the planning of conservation and sustainable utilization from endemic plants.
Keywords: Endemic plant, Quantitative characteristic, Invasive alien plant specie
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
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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