1,720,963 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
Effects of ILeVo seed treatment on Heterodera glycines reproduction and soybean yield in small-plot and strip-trial experiments in Iowa
Full text linkILeVO (fluopyram) is a fungicide seed treatment for soybean sudden death syndrome (SDS) that also has nematicidal activity. ILeVO is sold with a base of insecticide Poncho (clothianidin), nematode-protectant VOTiVO (Bacillus firmus), and Acceleron fungicides (metalaxyl, fluxapyroxad, pyraclostrobin). Yield and reproduction of the soybean cyst nematode (Heterodera glycines; SCN) on soybeans grown from seed treated with ILeVO plus the base were compared to those treated with only the base in 27 small-plot experiments and 12 strip- trial experiments across Iowa from 2015 – 2017. To increase the likelihood that yield results were related to effects on SCN, data were used only from 26 small-plot experiments and 12 strip trials, those in which symptoms of SDS were low or nonexistent. An SCN reproductive factor (RF) was calculated for each experimental unit by dividing the SCN population density at harvest by the population density at planting. ILeVO significantly reduced SCN RF by 50 percent in one strip-trial experiment and by 36 percent to 60 percent in four small-plot experiments but yields were not increased by ILeVO in any of those five experiments. Soybean yields were 2.8 to 3.7 bu/ac (188.3 to 248.8 kg/ha) greater with ILeVO in three small-plot experiments, but SCN RF was not reduced in those experiments. Also, yield was 1.9 bu/ac (127.8 kg/ha) greater with ILeVO in one strip-trial experiment in 2016, but SCN samples were not collected at harvest from the study to assess the possible effects of ILeVO on SCN reproduction. When strip-trial data from 2015 and 2016 were combined, there was a small but significant 0.8 bu/ac (52.2 kg/ha) yield increase with ILeVO. Overall, the effects of Ilevo on SCN reproduction and soybean yield were variable in these field studies.This is a manuscript of an article published as Bissonnette, Kaitlyn M., Chris C. Marett, Mark P. Mullaney, Gregory Gebhart, Peter Kyveryga, Tristan Mueller, and Gregory L. Tylka. "Effects of ILeVo seed treatment on Heterodera glycines reproduction and soybean yield in small-plot and strip-trial experiments in Iowa." Plant Disease (2020). doi: 10.1094/PDIS-06-19-1132-RE.</p
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
Fusarium in winter wheat: mycotoxin accumulation in straw and a survey of roots
Full text linkFusarium species are common pathogens of cereal crops worldwide and are responsible for many diseases including Fusarium root rot (FRR), Fusarium crown rot (FCR), and Fusarium head blight (FHB). In recent years, Fusarium mycotoxins, primarily deoxynivalenol (DON), 3-acetyldeoxynivalenol (3ADON), and 15-acetyldeoxynivaleol (15ADON), have been detected in conjunction with wheat straw, a substrate commonly used for livestock bedding. Little is known about how or why these mycotoxins are accumulating in the straw, or more importantly, how to manage them. With FHB being the predominant Fusarium-associated disease of winter wheat in Illinois, management practices associated with the control of FHB were assessed for their effectiveness in reducing Fusarium-mycotoxin accumulation in straw. Three studies were conducted from 2011 to 2014 to determine the efficacy of fungicides, host resistance, and the use of integrated disease management strategies in controlling FHB and the subsequent mycotoxin accumulation in the straw. These studies determined that: i) the demethylation inhibitor (DMI) fungicides did not provide significant control of mycotoxin accumulation in the straw over non-treated control plots, but significantly decreased mycotoxin accumulation over the application of quinone outside inhibitor (QoI) fungicides; ii) the use of a moderately resistant cultivar offered significant control of mycotoxin accumulation in the straw over a susceptible cultivar regardless of whether or not a fungicide was applied; iii) the selection of a moderately resistant cultivar offers effective control of DON accumulation in the grain and mycotoxin accumulation in the straw. Two additional studies investigated the accumulation of Fusarium mycotoxins by straw portion and their relationship to the presence of Fusarium graminearum DNA. A field trial and a greenhouse trial were conducted using soft red winter wheat cultivars ranging in susceptibility to FHB to determine when in the growing season mycotoxins begin accumulating in the straw and if mycotoxin accumulation in the straw is related to the presence of F. graminearum DNA. Results indicated that: i) mycotoxin accumulation by 28 DAA significantly differed between the top and bottom portion of the stem in the susceptible cultivars; ii) mycotoxin concentrations and F. graminearum DNA concentration differed significantly by stem portion based on the point of inoculation. The final study was a comprehensive survey of winter wheat roots in Illinois to determine the primary Fusarium species present and if these species produce DON, potentially contributing to DON accumulation in the straw. Isolates were identified to species using TEF 1-α primers specific for Fusarium, and sequences were verified using the Fusarium Multi-Locus Sequence Typing (MLST) database. The primary species associated with winter wheat roots was F. acuminatum, followed by F. graminearum, F. sporotrichoides, and isolates from the F. incarnatum-equiseti species complex. Though not the primary species associated with wheat roots in this survey, the recovery of F. graminearum in this study may serve as a means by which Fusarium mycotoxins may accumulate in the straw, especially if environmental conditions are conducive to infection.
Results from these studies indicate that the control measures typically used to manage Fusarium mycotoxins in wheat grain, primarily the selection of resistant cultivars, may be an effective means to reduce mycotoxin accumulation in the straw and that fungal colonization of the crown may be related to mycotoxin accumulation in the straw, especially when F. graminearum is present as a crown rotting pathogen.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2018-08-01The student, Kaitlyn Bissonnette, accepted the attached license on 2016-06-09 at 19:49.The student, Kaitlyn Bissonnette, submitted this Dissertation for approval on 2016-06-09 at 19:59.This Dissertation was approved for publication on 2016-06-16 at 09:58.DSpace SAF Submission Ingestion Package generated from Vireo submission #9653 on 2016-11-10 at 12:19:20Made available in DSpace on 2016-11-10T18:27:25Z (GMT). No. of bitstreams: 2
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Previous issue date: 2016-06-16Embargo set by: Seth Robbins for item 95315
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