1,720,987 research outputs found
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
DOWN-REGULATION OF HEPATIC MBOAT7 BY HYPERINSULINEMIA FAVORS STEATOSIS DEVELOPMENT
Full text linkBackground and aims: Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver diseases in Western Countries. NAFLD could evolve into nonalcoholic steatohepatitis (NASH), which is associated with activation of fibrogenesis, possibly leading to cirrhosis and hepatocellular carcinoma (HCC). The genetic background plays a pivotal role in predisposing to development and progression of liver disease. Recently, our group have shown that the rs641738 C>T variant, in the Membrane bound o-acyltransferase domain-containing 7 locus (MBOAT7), increases the risk of NAFLD, NASH and fibrosis, by decreasing the hepatic expression of MBOAT7, a protein involved in phosphatidylinositol acyl-chain remodeling. Aim of this study was to evaluate the regulation of hepatic MBOAT7 and the impact on hepatic fat accumulation.
Methods: We examined hepatic and adipose MBOAT7 expression in 119 obese patients and in experimental models. We silenced hepatic Mboat7 by i.v. administration of antisense oligonucleotides modified by morpholinos (MPO) for 4 consecutive days in C57Bl/6 male mice (n=6).
Results: In obese patients, hepatic mRNA levels of MBOAT7 progressively decreased from normal liver to simple steatosis and NASH (p<0.05). At multivariate analysis, type 2 diabetes (p<0.05), necroinflammation (p<0.01) and MBOAT7 genotype (p<0.01) were independently associated with MBOAT7 down-regulation. This suggests that down-regulation of hepatic MBOAT7 is involved in NAFLD pathogenesis independently of MBOAT7 genotype. In line with this hypothesis, we found that mRNA and protein levels of Mboat7 were reduced in experimental models of NAFLD: in the methionine-choline deficient diet (MCD), but more so in genetically obese Lepob/ob mice and in insulin resistant mice with Insulin receptor haplo-insufficiency (InsR+/-), characterized by hyperinsulinemia (p<0.05). Furthermore, in wild-type male mice Mboat7 was physiologically down-regulated by refeeding concomitantly with the rise of insulin levels and activation of hepatic insulin signaling through Phosphatidyl Inositol 3-Kinase (PI3K) and the Serine/Threonine Kinase AKT. In keeping with these results, activation of insulin-receptor dependent signaling down-regulated Mboat7 protein expression in primary mouse hepatocytes in a PI3Kinase-depedent manner. Consistently, in InsR+/- hepatocytes insulin-mediated suppression of Mboat7 was lost (p<0.01). Moreover, the effect of insulin on Mboat7 expression was also abrogated in wild-type hepatocytes treated with antisense oligonucleotide stabilized by morpholination directed against FoxO1 (MPO) (p<0.05). These data suggest that FoxO1 is required to mediate the Mboat7 regulation by insulin. Consistently with this notion, the hampered Mboat7 expression observed in InsR+/- hepatocytes was rescued by FoxO1-silencing by antisense-MPO (p<0.05 vs scramble). Finally, in vivo administration of antisense-MPO against Mboat7 for 4 consecutive days, induced a 45% silencing of hepatic Mboat7 in wild-type male mice, which is comparable to that associated with the genetic risk variant, resulting in 80% increase in hepatic TG content (p<0.05 vs scramble) and in microvesicular steatosis development. In contrast, it did not affect circulating glucose, insulin and lipid levels. Steatosis development was not explained by altered de novo lipogenesis or β-oxidation or VLDL export, but was associated with increased expression of fatty acids transporters (such as Fatp1, Fabp1). Conversely, Mboat7 silencing was not associated with alterations in the hepatic expression of inflammatory cytokines and chemokines (such as Tnf-α and Cxcl10). These data are consistent with human genetic data suggesting that MBOAT7 down-regulation plays a causal role in NAFLD development.
Conclusion: In summary, we found that hyperinsulinemia, a typical feature of metabolic syndrome and post-prandial conditions, reduces hepatic MBOAT7 expression via increased insulin signaling activation through the Insulin receptor - PI3K – FoxO1 pathway. Reduced MBOAT7 then favors hepatic fat accumulation. These data suggest that MBOAT7 down-regulation may be implicated in the pathogenesis of progressive NAFLD
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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