1,720,978 research outputs found
Assessment of the distribution of two sympatric rail species in relation to habitat composition and disturbance on Santa Cruz Island, Galápagos
Full text linkThe Galápagos archipelago is a biodiversity hotspot with relatively few extinctions recorded. However, a negative trend for Galápagos rail’s population in Santa Cruz Island was confirmed. We aim to evaluate the species’ population status, assess the role of habitat composition on its distribution and describe the first insights about which factors affects its distribution and the paint-billed crake’s distribution. Point counts with fixed distance were used in four areas to census both species, using 197 points from 2007 and an additional 111 points. We also assessed the vegetation cover in the tree, shrub, and ground layers. The Galápagos rail detection and abundance significantly increased in Highlands Media Luna since 2007 due to a significant decrease in the occurrence of the red-barked quinine tree. However, the hill blackberry had significantly increased. The Galápagos rail seems to be related with dense ground vegetation. Its population is at the same levels as in 1986, but there is little evidence of about the factors influencing the distribution of both species, based only on habitat requirements; Avaliação da distribuição de Laterallus spilonota em relação ao habitat e a Mustelirallus erythrops, na ilha de Santa Cruz, Galápagos - Resumo:
As ilhas Galápagos são consideradas um “hotspot” de biodiversidade onde ocorreram poucas extinções, apesar da população de Laterallus spilonota ter reduzido acentuadamente em Santa Cruz. Os nossos objetivos são avaliar o status da sua população e o papel que a composição do habitat tem na sua distribuição, bem como apresentar as primeiras evidências sobre quais os fatores que afetam a distribuição de L. spilonota e Mustelirallus erythrops. Para realizar os censos de ambas as espécies foram utilizados pontos com distância fixa em 4 áreas de Santa Cruz. Foram usados os mesmos 197 pontos de 2007 e 111 pontos adicionais. Foi também avaliada a cobertura vegetal no estrato arbóreo, arbustivo e herbáceo. A deteção e abundância de L. spilonota aumentaram significativamente em Highlands Media Luna desde 2007, devido a uma diminuição significativa da ocorrência de Cinchona pubescens. Porém, a ocorrência de Rubus niveus aumentou significativamente. Laterallus spilonota parece ser mais abundante em locais onde a vegetação herbácea é densa, estando a sua população nos mesmos níveis de 1986. Além disso, existem poucos indícios sobre a distribuição das duas espécies apenas com base na composição do habitat; Evaluación de la distribución del Pachay en relación con el hábitat y la Gallareta de Pico Rojo, en la isla Santa Cruz, Galápagos - Resumen:
Las islas Galápagos son un “hotspot” de biodiversidad con pocos registros de extinciones, aunque la población del pachay se ha reducido notablemente en Santa Cruz. Nuestros objetivos son evaluar el estado de su población y el papel que la composición del hábitat tien en su distribución, así como presentar las primeras pruebas sobre qué factores afectan a la distribución del pachay e de la gallareta de pico rojo. Para realizar los censos de ambas especies se utilizaron puntos con distancia fija en 4 zonas de Santa Cruz. Se utilizaron los mismos 197 puntos de 2007 y 111 puntos adicionales. También se evaluó la cobertura vegetal en el estrato arbóreo, arbustivo y herbáceo. La detección y la abundancia del pachay aumentaron significativamente en Media Luna desde 2007, debido a una disminución significativa de la presencia de cascarilla. Sin embargo, la presencia de mora aumentó significativamente. El pachay parece ser más abundante en los lugares donde la vegetación herbácea es densa y su población se encuentra en los mismos niveles que en 1986. Además, hay pocas pruebas sobre la distribución de las dos especies basándose únicamente en la composición del hábitat
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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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