1,720,953 research outputs found
Organic carbon fractions on a Rhodic Kandiudalf and a Typic Eutrudept with organomineral fertilizer
No full textSoil organic carbon contents can change due to agricultural practices, mainly related to the efficient use, considering new fertilizer technologies. The objective was quantify contents and stocks of total organic carbon (TOC), particulate (COP), associated with minerals (OCam), in different layers of a Rhodic Kandiudalf and a Typic Eutrudept using mineral and organomineral fertilizers, applied in dry and fluid forms. The experiment was characterized by using 2x5 factorial design, with four replications, in randomized blocks, described as follows: Factor A: Soil: Rhodic Kandiudalf and Typic Eutrudept. Factor B, fertilization described as follows: control, fluid organomineral (FO), dry organomineral (DO), fluid mineral (FM) and dry mineral (DM). The crop system evaluated was maize, oats, sorghum and wheat, from 2010 to 2013. Use of different mineral and organomineral fertilizers in dry and fluid forms after three years under no-till system did not change TOC, COP and OCam contents on these two soils, with the exception of FM treatment on Typic Dystrudept regarding to TOC and OCam in 0-5 and 0-20 cm layers and COP in 5-10 cm layer, these results reflect the stock of TOC and OCam in 0-20 cm layer where FM was equivalent to DM and DO and higher than the other teatmments. There was significance difference for carbon management indices only in 5-10 cm layer on Typic Eutrudept, where FM was similar to DO and higher than the others treatments. FO treatment showed higher carbon input comparing to the other theatments, with high dry mass of oats, sorghum, wheat and maize produced on Rhodic Kandiudalf, while on Typic Eutrudept fertilizers were more productive compared to the control treatment. There was no relation between C inputs, highest in the FO treatment, and TOC, COP and OCam contents, highest C in the FM treatmentO teor de carbono orgânico do solo pode sofrer alterações com as práticas agrícolas adotadas em especial o uso eficiente de nutriente associado a novas tecnologias de fertilizantes. O objetivo foi quantificar os teores e estoques de carbono orgânico total (COT), particulado (COP), associado aos minerais (COam), em diferentes camadas de Nitossolo e Cambissolo submetidos à aplicação de fertilizantes minerais e organominerais nas formas sólidas e fluidas. Os tratamentos caracterizam fatorial 2x5, em blocos casualizados com grupos de experimento e quatro repetições, descritos a seguir: Fator A: Solo: Nitossolo Vermelho Eutroférrico típico e Cambissolo Háplico Eutroférrico léptico. Fator B, adubação descrita a seguir: controle, organomineral fluído (OF), organomineral sólido (OS), mineral fluído (MF) e mineral sólido (MS). A resposta foi avaliada em cultivos sucessivos de milho e aveia, sorgo forrageiro e trigo, no período de 2010 a 2013. O uso de diferentes fertilizantes minerais e organominerais nas formas sólidas e fluídas após três anos de culturas sob plantio direto não alterou os teores de COT, COP e COam tanto em Nitossolo como Cambissolo, salva exceção no tratamento MF para Cambissolo em COT e COam na camada de 0-5 e 0-20 cm e COP na camada de 5-10 cm, resultados que refletem os estoques de COT e COam na camada de 0-20 cm, onde MF foi igual a MS e OS, e superior aos demais tratamentos. Pode-se verificar diferença para IMC apenas na camada 5-10 cm para Cambissolo, sendo o MF igual ao OS e superior aos demais tratamentos. Quanto ao aporte de C o tratamento OF foi superior aos demais, com maior produção de biomassa seca de aveia, sorgo, trigo e milho na condição de Nitossolo, enquanto que em Cambissolo, os fertilizantes mostram superioridade em relação ao controle. Não houve correspondência entre aporte de C, maior no tratamento OF, com os teores de COT, COP e COam, que foram maiores no MFCoordenação de Aperfeiçoamento de Pessoal de Nível Superio
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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