1,720,959 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
The use of genome-wide prediction to increase efficiency in plant breeding programs
Full text linkFollowing the establishment of genome-wide selection in plant breeding programs, the search for areas of application for this promising technology continues. Of particular interest is the use of genome-wide selection to improve populations across generations, for example in long-term breeding programs or in parental selection. This work provides user-based experimental assessments of the utility of genome-wide selection in parental selection in barley under usefulness criterion estimation, and in reciprocal recurrent genomic selection for long-term improvement of complementary populations for wheat hybrid breeding. Empirical evidence suggests that, despite promising performance in theoretical and simulation-based environments, both concepts evaluated here present challenges under application-oriented conditions.Nachdem sich die genomweite Selektion in Pflanzenzuchtprogrammen etabliert hat, geht die Suche nach Anwendungsbereichen für diese vielversprechende Technologie weiter. Von besonderem Interesse ist der Einsatz der genomweiten Selektion zur Verbesserung von Populationen über Generationen hinweg, z. B. in langfristigen Züchtungsprogrammen oder bei der Elternselektion. Die vorliegende Arbeit liefert anwenderbasierte experimentelle Bewertungen des Nutzens der genomweiten Selektion bei der Elternselektion von Gerste unter Schätzung des Usefulness Criterions und bei der reziproken rekurrenten genomischen Selektion zur langfristigen Verbesserung komplementärer Populationen für die Weizenhybridzucht. Empirische Belege deuten darauf hin, dass trotz vielversprechender Indikatoren in theoretischen und simulationsbasierten Umgebungen beide hier evaluierten Konzepte unter anwendungsorientierten Bedingungen noch große Herausforderungen darstellen
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
Genomics-informed prebreeding unlocks the diversity in genebanks for wheat improvement
No full textBundesministerium für Bildung und Forschung https://doi.org/10.13039/501100002347Bundesministerium für Ernährung und Landwirtschaft https://doi.org/10.13039/50110000590
Large-scale genotyping and phenotyping of a worldwide winter wheat genebank for its use in pre-breeding
No full textAbstract Plant genetic resources (PGR) stored at genebanks are humanity’s crop diversity savings for the future. Information on PGR contrasted with modern cultivars is key to select PGR parents for pre-breeding. Genotyping-by-sequencing was performed for 7,745 winter wheat PGR samples from the German Federal ex situ genebank at IPK Gatersleben and for 325 modern cultivars. Whole-genome shotgun sequencing was carried out for 446 diverse PGR samples and 322 modern cultivars and lines. In 19 field trials, 7,683 PGR and 232 elite cultivars were characterized for resistance to yellow rust - one of the major threats to wheat worldwide. Yield breeding values of 707 PGR were estimated using hybrid crosses with 36 cultivars - an approach that reduces the lack of agronomic adaptation of PGR and provides better estimates of their contribution to yield breeding. Cross-validations support the interoperability between genomic and phenotypic data. The here presented data are a stepping stone to unlock the functional variation of PGR for European pre-breeding and are the basis for future breeding and research activities.Bundesministerium für Bildung und Forschung https://doi.org/10.13039/501100002347Bundesministerium für Ernährung und Landwirtschaft https://doi.org/10.13039/50110000590
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
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