1,720,978 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
Nutrition, biomass partition and growth of teak stands in Tangará da Serra-MT
Get PDFA Tectona grandis, popularmente conhecida como teca, originária do sudoeste asiático, é cultivada no Mato Grosso com sucesso, com a obtenção de madeira para serraria de ótima qualidade. O adequado manejo nutricional é condição necessária à obtenção de altas produtividades, bem como à sustentabilidade da produção. Este trabalho teve como objetivos: 1) quantificar a biomassa, o conteúdo de macronutrientes e sua distribuição nos diferentes compartimentos de árvores de teca e avaliar a eficiência de uso desses nutrientes para formação dos diferentes compartimentos e superfícies de aquisição dos recursos luz, água e nutrientes; 2) parametrizar o modelo de crescimento, baseado em processos, 3-PG (Physiological Principles in Predicting Growth) para plantios de teca na região Sudoeste de Mato Grosso; e 3) aprimorar o subsistema planta do sistema para recomendação de adubação para teca (FERTTECA). O trabalho foi desenvolvido em povoamentos de teca no município de Tangará da Serra-MT onde foram avaliadas sete parcelas com 132 árvores/parcela. Destas, duas eram parcelas com árvores jovens (17 meses) e cinco com árvores adultas (90 meses), três das quais também já avaliadas aos 29 meses por Oliveira (2003) e outras duas foram adicionadas e avaliadas em 2004 pela própria empresa proprietária da área. Em conjunto, foram assim obtidas quatro épocas diferentes de avaliação 17, 29, 64 e 90 meses. Foi abatida a árvore média em cada parcela aos 17, 29 e 64 meses, já aos 90 meses estratificou-se em três classes de diâmetro (DAP), representando o grau de dominância. Foram individualizados os componentes: folhas, galhos, casca, lenho, raízes e serapilheira, visando à determinação da matéria seca, teores e conteúdo de nutrientes, além da área foliar específica (AFE) e área específica de raízes finas ( Ca > N > Mg > P > S, sendo o P e S os nutrientes utilizados com maior eficiência para a formação de superfície radicular. A teca apresentou, em média, área foliar específica (AFE) de 13,1 m²/kg e ARE (raízes finas) de 13,9 m²/kg, indicando eficiência de mesma ordem de magnitude quanto à utilização do C na produção de superfícies para aquisição dos recursos radiação solar, água e nutrientes. O índice de área foliar (IAF) médio foi 1,2 m²/m² nas plantas jovens e de 8,3 m²/m² nas plantas adultas. A biomassa total do povoamento aos 90 meses foi de 133 t/ha, particionada na seguinte seqüência: lenho (51 %), raízes (17 %), galhos (13 %), casca (7 %) e folhas (5 %). A eficiência de utilização dos nutrientes para produção de parte aérea apresentou a seqüência S > P > Mg > N > K > Ca enquanto que para o lenho S > Mg > P > Ca > N > K, não havendo diferenças apreciáveis de eficiência em função do grau de dominância das árvores. A parametrização do 3-PG proporcionou boas estimativas para biomassa de folhas, índice da área foliar, biomassa de fuste (tronco + galhos), DAP, volume de lenho e incremento médio anual, variáveis que refletem o crescimento da floresta. A partição de carbono e de macronutrientes minerais para a copa decresceu com a idade das árvores, aumentando no tronco. O sistema FERTTECA mostrou-se satisfatório quanto às estimativas de produção volumétrica e de biomassa, bem como quanto aos conteúdos estimados de nutrientes no lenho ou no tronco.Tectona grandis, popularly known as teak, originated in the Southwest Asia, is being successfully cultivated in Mato Grosso State, Brazil, providing high-quality wood for sawmill. Appropriate nutritional management is necessary to the obtain of high productivity, as well as the sustainability of the production. This work had as objectives: 1) quantify the biomass, the macronutrients content and their distribution in the different compartments of teak trees, in order to evaluate the use efficiency of those nutrients for the formation of different compartments and surfaces of acquisition of resources: light, water and nutrient; 2) parameterization of the processes-based growth model 3-PG (Physiological Principles in Predicting Growth) for teak plantations cultivated in the Southwest region of Mato Grosso; and 3) improve the plant subsystem of the system for using in fertilizer recommendations for teak plantations (FERTTECA). The work was developed in teak plantations located in Tangará da Serra-MT, a municipality in which seven plots with 132 trees each were assessed. Two of these plots were with young trees (17 months) and five with adult trees (90 months). Three of these adult plots were already evaluated at 29 months by Oliveira (2003) and two more were added and evaluated in 2004 by the company owning the area. Together, four different times of evaluation 17, 29, 64 and 90 months were obtained. The average tree was cut down in each plot at 17, 29 and 64 months, however, at 90 months, the stands were divided into three 1.3 m-diameter (DBH) classes (lower, middle and upper class). The sample trees were those with the DBH values closest to the average of each class. The trees were xviii separated into: leaves, branches, bark, stemwood, roots and litter, aiming the determination of dried matter and nutrients content besides the specific leaf area (SLA) and specific root area (SRA) for fine roots ( Ca > N > Mg > P > S, being P and S the nutrients used with the highest efficiency for the formation of root surface. The teak presented, on average, specific leaf area (SLA) of 13.1 m²/kg and SRA (fine roots) of 13.9 m²/kg, indicating similar C use efficiency in the production of surfaces for acquisition of resources (solar radiation, water and nutrients) and suggesting synchrony in the C allocation for leaves and roots. The leaf area index (LAI) was 1.2 m²/m² in young plants and 8.3 m²/m² in adult plants. The total biomass determined at 90 months was 133 t/ha with the following partition: stemwood (51%), roots (17%), branches (13%), bark (7%) and leaves (5%). The nutrients use efficiency for aboveground biomass production, in decreasing order, was S > P > Mg > N > K >Ca, while for stemwood production was S > Mg > P > Ca > N > K, having no appreciable differences of efficiency in function of the dominance degree of the trees. The 3-PG parameterization provided good estimates for leaves biomass, SLA, stem biomass (trunk + branches), DBH, stemwood volume and annual average increment, variables that reflect the forest growth. The partition of mineral macronutrients and carbon to the canopy decreased with the age of the trees, increasing in the trunk. The FERTTECA system showed satisfactory estimates of volumetric production and biomass, as well as nutrients contents in stemwood and trunk.Conselho Nacional de Desenvolvimento Científico e Tecnológic
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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