1,721,031 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
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
Trends in runs of homozygosity and inbreeding in Norwegian Red Cattle before and after implementation of genomic selection
No full textBackground: Despite commercial breeding being part of the genomic era, routine use of genotype data to govern inbreeding is still scarce. Recent studies have found acceleration of inbreeding rates after implementation of GS. Development of robust and reliable genomic inbreeding metrics should therefore be a priority. Aim of this study was to optimize detection of runs of homozygosity (ROH) and use these along with inbreeding coefficients based on pedigree and genomic relationship matrix to examine trends in genome wide and region-specific inbreeding after implementation of GS in Norwegian Red Cattle (NR).
Methods: Pedigree data from whole population and genotype data from 80.999 animals (on 777K chip) was used to estimate inbreeding coefficients and rates of inbreeding. FPED, FGRM and FROHwas used to assess inbreeding trends in NR before and after implementation of GS. ROH was also used to examine inbreeding on individual chromosomes. Detection of ROH in PLINK was optimized using genome coverage validation method.
Results: Parameter settings and density of data set was found to strongly influence ROH detection. No significant increase in rates of inbreeding was found after implementation of GS in NR, neither in genome wide nor chromosomal estimates. We detected an abundance of short ROH in the genome of NR, indicating little recent inbreeding. Rates of inbreeding were well within recommended 0.5-1% limits. High correlations between FROH and FGRM indicate that these metrics can be used for routine inbreeding estimation in NR.
Conclusion: We lay the foundation for a framework that can be used to develop methodology for genomic inbreeding evaluation in NR. Calculations in this thesis only had 3,5 years of GS to base upon, and paucity of data strongly limits estimates. Estimates should be repeated when more time from implementation of GS has elapsed. Development of methods using genomic information to manage inbreeding in NR is advisable
Ernæringen i drægtighedsperioden påvirker afkommet i de efterfølgende generationer hos mink
No full textUtvikling i genomisk innavl etter implementering av genomisk seleksjon hos Norsk Rødt Fe
No full textBackground: Despite commercial breeding being part of the genomic era, routine use of genotype data to govern inbreeding is still scarce. Recent studies have found acceleration of inbreeding rates after implementation of GS. Development of robust and reliable genomic inbreeding metrics should therefore be a priority. Aim of this study was to optimize detection of runs of homozygosity (ROH) and use these along with inbreeding coefficients based on pedigree and genomic relationship matrix to examine trends in genome wide and region-specific inbreeding after implementation of GS in Norwegian Red Cattle (NR).
Methods: Pedigree data from whole population and genotype data from 80.999 animals (on 777K chip) was used to estimate inbreeding coefficients and rates of inbreeding. FPED, FGRM and FROHwas used to assess inbreeding trends in NR before and after implementation of GS. ROH was also used to examine inbreeding on individual chromosomes. Detection of ROH in PLINK was optimized using genome coverage validation method.
Results: Parameter settings and density of data set was found to strongly influence ROH detection. No significant increase in rates of inbreeding was found after implementation of GS in NR, neither in genome wide nor chromosomal estimates. We detected an abundance of short ROH in the genome of NR, indicating little recent inbreeding. Rates of inbreeding were well within recommended 0.5-1% limits. High correlations between FROH and FGRM indicate that these metrics can be used for routine inbreeding estimation in NR.
Conclusion: We lay the foundation for a framework that can be used to develop methodology for genomic inbreeding evaluation in NR. Calculations in this thesis only had 3,5 years of GS to base upon, and paucity of data strongly limits estimates. Estimates should be repeated when more time from implementation of GS has elapsed. Development of methods using genomic information to manage inbreeding in NR is advisable.M-H
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