1,720,954 research outputs found
Multibreed genomic evaluation in animals from different genetic groups (Nellore, Aberdeen Angus and Crossbreds) using metafounders
No full textA genômica oferece oportunidades significativas para aumentar o ganho genético em sistemas de produção de gado de corte, mas a implementação em larga escala no Brasil enfrenta desafios devido ao custo elevado da genotipagem. Uma solução econômica é o desenvolvimento de painéis de marcadores SNP personalizados, que são mais acessíveis e focados em objetivos específicos de melhoramento genético. O presente estudo utilizou dados genômicos para identificar indivíduos ou animais fundadores por meio da metodologia de metafundadores (MFs) e implementar matrizes genômicas ponderadas para integrar informações das raças Nelore e Angus, utilizando o método single-step genomic BLUP (ssGBLUP) para características de crescimento, como peso ajustado aos 120 dias de idade (P120) e peso ao desmame (P210). Foram avaliados três cenários para estimação de componentes de variância e predição de valores genéticos: BLUP tradicional, ssGBLUP com dois MFs (Nelore e Cruzados) e ssGBLUP com três MFs (Nelore, Angus e Cruzados). Objetivou-se alinhar as informações genômicas e de pedigree, reduzir o viés nas predições e aumentar a precisão dos dados, especialmente para o cruzamento Nelore x Angus. A análise comparativa das características P120 e P210 revelou diferenças importantes em termos de viés, dispersão e acurácia. A inclusão de metafundadores melhorou a precisão dos modelos preditivos para a raça Nelore, demonstrada pela redução do viés e aumento da acurácia, especialmente para o cenário P120. Embora a utilização de metafundadores tenha trazido melhorias significativas para a raça Nelore, a adaptação dos modelos ssGBLUP às diferentes estruturas genéticas é crucial. A abordagem multirracial, evidenciada pelo impacto menor na acurácia em bovinos cruzados, sugere que futuras avaliações genéticas devem considerar a ampliação da base de dados e a inclusão de características genéticas específicas de populações de cruzamento. Isso permitirá um planejamento estratégico mais preciso e um aprimoramento na produção de carne de valor agregado, beneficiando a indústria da carne, ao melhorar o desempenho dos produtos e a valorização das matrizes zebuínas no processo comercial.Genomics offers reasonable opportunities to increase genetic gain in beef cattle production systems, but large-scale implementation in Brazil faces challenges due to the high cost of genotyping. A cost-effective solution is the development of customized SNP marker panels, which are more accessible and focused on specific breeding objectives. The present study used genomic data to identify founder individuals or animals through the metafounders (MFs) methodology and implement weighted genomic matrices to integrate information from the Nellore and Angus breeds using the single-step genomic BLUP (ssGBLUP) method for growth traits, such as adjusted weight at 120 days of age (W120) and weaning weight (W210). Three scenarios were evaluated for variance component testing and genetic value prediction: traditional BLUP, ssGBLUP with two MFs (Nellore and Crossbreds), and ssGBLUP with three MFs (Nellore, Angus, and Crossbreds). The objective was to align genomic and pedigree information, reduce prediction wins, and increase data accuracy, especially for Nellore x Angus crosses. The comparative analysis of the P120 and P210 scenarios revealed important differences in terms of vision, dispersion, and accuracy. The inclusion of metafounders improved the accuracy of predictive models for the Nellore breed, demonstrated by the reduction of bias and increase in accuracy, especially in the P120 scenario. Although the use of metafounders brought significant improvements for the Nellore breed, the adaptation of ssGBLUP models to different genetic structures is crucial. The multibreed approach, evidenced by the lower impact on accuracy in crossbreeds, suggests that future genetic evaluations should consider expanding the database and including specific genetic traits from crossbreeds. This will allow more accurate strategic planning and an improvement in the production of value-added meat, benefiting the meat industry to improve product performance and valorization of zebu matrices in the commercial process
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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