1,720,966 research outputs found
SURVEY OF POPULATIONS OF MAMMALS AND BIRDS IN A FRAGMENT OF THE HIGH CAATINGA SERTÃO SERGIPANO
No full textThe main aim of the present study was to advance our knowledge of the biodiversity of the Caatinga biome, the only exclusively Brazilian ecoregion, which suffers constant
degradation. The study area, in the municipality of Porto da Folha, Sergipe, appears to be typical of the region, with evidence of habitat degradation and hunting pressure, factors
which affect local populations of fauna and flora directly. Line transect population surveys were conducted in July, August, and December, 2009, with a total of 132.9 km walked on
four trails representing the main area of the fragment. The results of these surveys provided reliable density estimates for only two species Callithrix jacchus (168.7 individuals per
km²) and Kerodon rupestris (116.7 inds./km²) whereas only two sightings of the target species (Callicebus barbarabrownae) were collected. The presence of other mammals, such as the Virginia opossum (Didelphis albiventris) and the raccoon (Procyon cancrivorous) was recorded from tracks and other indirect evidence. Given the paucity of
records for the target species, population parameters were estimated using playback survey methods, based on the broadcasting of the species vocalizations through a megaphone, in order to provoke a response from the animals, which reveals their position in the forest and permits the mapping of group locations through triangulation. Playback surveys were conducted between September and November, 2009. The mapped locations were analyzed in order to define the portion of the fragment occupied by the titi monkeys, and identify habitat preferences. Two resident groups were identified, in addition to the presence of at least one solitary animal. With a total of 57 records, the playback method proved far more efficient than the traditional line transect procedure for the surveying of the Callicebus population, and should be the method of choice for surveys, especially in small fragments. During complementary observations, a total of 66 bird species were recorded at the site in July, August and November, 2009. Most of the species were either insectivores (36.6%), omnivores (22.7%) or granivores (16.7%), and the largest number of species was recorded
in anthropogenic habitats. In addition to providing the first detailed data on population parameters and habitat preferences in Callicebus barbarabrownae, the study emphasizes the value of playback procedures for the surveying of titi populations.Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorO principal objetivo deste estudo foi aumentar o conhecimento da biodiversidade do bioma caatinga, a ecoregião exclusivamente brasileira e que sofre constante degradação. A área de estudo, no município de Porto da Folha, Sergipe, apresenta evidências de degradação de
habitat e pressão de caça, fatores que afetam diretamente as populações locais de fauna e flora. Durante o censo populacional, realizado nos meses de julho, agosto e dezembro de 2009, um total de 132,9 km foram percorridos em quatro trilhas que representam as principais áreas do fragmento. A aplicação deste método permitiu estimar a densidade de duas espécies Callithrix jacchus (169,7 indivíduos/km2) e Kerodon rupestris (116,7 indivíduos/km2) considerando que apenas dois avistamentos da espécie-alvo (Callicebus barbarabrownae) foram coletados. A presença de outros mamíferos, como o gambá-davirgínia (Didelphis albiventris) e o guaxinim (Procyon cancrivorous) foi registrada por visualização e outras evidências indiretas. Devido à escassez de registros para a espéciealvo, parâmetros populacionais foram estimados usando o método de playback onde as vocalizações dos animais são reproduzidas com o auxílio de um megafone, a fim de provocar uma resposta dos mesmos. Ao responder ao playback eles revelam a sua posição
na floresta e permitem o mapeamento dos locais dos grupos através da triangulação. Este método foi aplicado entre setembro e novembro de 2009. O mapeamento das localizações foi analisado a fim de definir a área de ocupação dos guigós no fragmento e identificar as preferências de habitat. Dois grupos residentes foram identificados, além da presença de pelo menos um animal solitário. Com um total de 57 registros, o método de reprodução de playback se mostrou mais eficiente do que o procedimento de transecção linear, para o levantamento da população de Callicebus sugerindo que este deve ser o método escolhido para levantamentos, especialmente em pequenos fragmentos. Durante observações
complementares, um total de 66 espécies de aves foi registrado no local em julho, agosto e novembro de 2009. As espécies numericamente dominantes na área de estudo foram os insetívoros (36,6%), seguidos dos onívoros (22,7%) e granívoros (16,7%) e o maior número de espécies foram registra das em habitats antrópicos. Além de fornecer os
primeiros dados detalhados sobre os parâmetros populacionais e de preferências de habitat para Callicebus barbarabrownae, o presente estudo ressalva a importância dos procedimentos de reprodução de playback para o levantamento das populações de guigós
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
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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