1,720,985 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
Conservation assessment of threatened frogs in KwaZulu–Natal and a national assessment of chytrid infection in threatened South African species
No full textThesis (PhD (Zoology))--North-West University, Potchefstroom Campus, 2012Amphibians are the most threatened Class of vertebrate on Earth, with 30% of all species IUCN Red Listed. This proportion is reflected in South Africa, where 29% of all species assessed in 2011 (SA-FRoG 2010; IUCN 2011; Measey 2011) fall into the threatened categories of Critically Endangered (7%), Endangered (12%) or Vulnerable (10%). This study is focussed on these species, with a particular emphasis on those that occur in the KwaZulu-Natal Province. The thesis is structured as follows: CHAPTER 1 gives a broad introduction to the global situation with regard to amphibian declines and the threats causing them as based on the literature. Additional information pertinent to successive chapters is given, including descriptions of KwaZulu-Natal's threatened frogs, detail on the disease chytridiomycosis and its causal agent, Batrachochytrium dendrobatidis (Bd), and the importance of the application of systematics for conservation. CHAPTER 2 provides baseline information on a national scale regarding the occurrence and prevalence of infection with Bd in South Africa's threatened frogs. This pathogen causes the disease chytridiomycosis and is responsible for amphibian declines globally. Samples were collected by means of skin swabs and analysed using quantitative PCR. Prevalence varied widely between threatened species (Avg. = 14.8%), with infection intensity being predominantly influenced by life history characteristics. The study also provides, for the first time, a distribution model for B. dendrobatidis occurrence in South Africa, indicating regions that are likely to harbour the pathogen. Such information is useful for application in disease prevention and control plans. CHAPTER 3 provides threat assessments for certain of the threatened species in KwaZulu-Natal, focussing on two sites per species, and makes recommendations on additional research requirements and appropriate conservation actions for these species. Particular emphasis is placed on Hyperolius pickersgilli, the province's only Critically Endangered species. CHAPTER 4 is focussed on the distribution of Hyperolius pickersgilli. Ecological niche modelling using Maxent was employed to predict the distribution of this species, and high probability areas were surveyed over two breeding seasons. Known historical sites were also re-visited and assessed for species presence. As a result of surveying, 5 new localities for the species were revealed, but half of the historical sites have been transformed to such an extent that the species no longer occurs there. In total, the species currently occurs at 17 localities, the majority of which are highly fragmented and threatened by human activity. The results of the survey were used to recalculate the area of occupancy (AOO) and extent of occurrence (EOO) for H. pickersgilli. Based on these findings, and the level of threat at the majority of sites and degree of fragmentation between them, the Critically Endangered status of this species remains warranted. CHAPTER 5 reviews the systematics of the Afrixalus spinifrons complex using morphological, call and molecular analysis. Although the first two methods have been used historically to delimit boundaries for taxa within this complex, genetic analysis has not been previously conducted. This study makes use of DNA sequencing from mitochondrial and nuclear gene markers to elucidate phylogenetic relationships within the complex. The results confirm that A. knysnae is part of the A. spinifrons clade, but is a separate species. Afrixalus spinifrons spinifrons and A. s. intermedius form distinct clusters, but are closely related confirming that the subspecies diagnosis as a representation of evolutionary divergence is accurate. The study does however differ from previous conclusions in that populations from the Eastern Cape group with A. s. intermedius from the KwaZulu-Natal midlands as opposed to A. s. spinifrons from the coast. Although these findings do not warrant designation of the subspecies to full species, they should be treated as evolutionary significant units for the purposes of conservation.Doctora
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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