1,720,987 research outputs found
Sensoriamento remoto aplicado à análise temporal da relação uso da terra/temperatura e albedo de superfície na bacia do Rio Vieira no Norte de Minas Gerais
Full text linkThis study aimed to analyze with the help of TM data - Landsat 5, the relationship between the changes in land use and the variation of temperature and surface albedo, during period winter in basin River Vieira for the years 1985, 1995 and 2010. The choice of river basin Vieira is justified because this area, located in the North of Minas Gerais, was the scene of intense and rapid population growth. So this fact led to several modifications to the systems of river basin Vieira land use, such as: rapid urban expansion, rehabilitation of degraded areas and human disturbance of natural areas. Allowing this context, the development of this work in an environment with appropriate changes in land use systems necessary for the research. The methodological procedures needed to analyze the relationship between changes in land use and the variation of temperature and surface albedo in the Rio Vieira were the following: the first procedure considered the treatment of satellite images in goal to map land use; this mapping, in turn, followed the hierarchical scheme proposed by Heymann Legend (1994). The second procedure considered the application of the algorithm semi empirical Surface Energy Balance Algorithms for Land - SEBAL, which describes the full swing of radiation on the Earth's surface from the spectral bands of visible, near infrared and thermal infrared. From an operational standpoint, the runtime of the methodology applied to the mapping of land use, since the acquisition of orbital products to validate the mappings, was relatively short. A fact that deserves attention, especially because it led to the development of a wide range of temporal information of Vieira River basin. With emphasis on the recovery of 54.79 km ² of natural vegetation in 25 years. From the viewpoint of the thermal mapping, the coefficient of variation showed a correlation between the temperature obtained by the SEBAL model and the air temperature, measured at about 1.5 m high, ranging from 0.61 to 11.38 % and an overall accuracy r ² = 0.961. This validation was highly effective in order that the data Landsat TM 5 are collected at an altitude of 705 km above the surface. The statistical validation shows that the estimate of the infrared emissivity obtained by this algorithm satisfy the need for obtaining the thermal modeling of river basin Vieira from the spectral channels of Landsat 5 TM sensor. It is recommended the SEBAL algorithm for studies seek to that analyze the spatial distribution of surface temperature data. Considering that the temperature of the surface is of great value to the understanding of various climatic phenomena.Mestre em GeografiaEste trabalho objetivou analisar, com auxílio de dados TM Landsat 5, as relações entre as mudanças no uso da terra e a variação da temperatura e do albedo de superfície, no período sazonal de inverno da bacia do Rio Vieira para os anos de 1985, 1995 e 2010. A escolha da bacia do Rio Vieira se justifica porque essa área, localizada na mesorregião do Norte do Estado de Minas Gerais, foi palco de um rápido e intenso crescimento populacional. De forma que esse fato proporcionou várias modificações nos sistemas de uso da terra dessa bacia, como por exemplo: rápida expansão urbana, recuperação de áreas degradadas e a antropização de áreas naturais. Permitindo, neste contexto, o desenvolvimento deste trabalho num ambiente com as devidas alterações dos sistemas de uso da terra. Os procedimentos metodológicos necessários para analisar as relações entre as mudanças no uso da terra e a variação da temperatura e do albedo de superfície na bacia do Rio Vieira foram os seguintes: o primeiro procedimento cuidou do tratamento das imagens de satélite com vistas ao mapeamento do uso da terra; esse mapeamento, por sua vez, obedeceu ao esquema hierárquico de legenda proposto por Heymann (1994). O segundo procedimento considerou a aplicação do algoritmo semiempírico Surface Energy Balance Algorithms for Land SEBAL, o qual descreve o balanço completo de radiação sobre a superfície da Terra a partir das bandas espectrais do visível, infravermelho próximo e infravermelho termal. Do ponto de vista operacional, o tempo de execução da metodologia aplicada ao mapeamento do uso da terra, desde a aquisição dos produtos orbitais até a validação dos mapeamentos, foi relativamente curto. Fato que merece destaque, sobretudo, porque permitiu a elaboração de uma vasta gama de informações temporais da bacia do Rio Vieira. Com destaque para a recuperação de 54,79 km² de vegetação natural em 25 anos. Do ponto de vista do mapeamento termal, o coeficiente de variação apontou uma correlação entre os dados de temperatura obtidos pelo modelo SEBAL e os dados de temperatura do ar, medidos a aproximadamente 1,5m do solo, variando de 0,61 e 11,38% e uma correlação geral em r² = 0,961. Essa validação se mostrou altamente eficiente, tendo em vista que os dados do TM Landsat 5 são coletados a uma altitude de 705 km em relação à superfície. A validação estatística permite concluir que a estimativa da emissividade infravermelha obtida pelo presente algoritmo satisfez a necessidade de obtenção da modelagem térmica da bacia do Rio Vieira a partir dos canais espectrais do sensor TM Landsat 5. Desta forma, recomenda-se o algoritmo SEBAL para estudos que busquem analisar a espacialização dos dados de temperatura de superfície. Tendo em vista que a temperatura dos alvos da superfície é de grande valia para a compreensão de vários fenômenos climáticos
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
- …
