1,721,961 research outputs found
Analysis of reproductive performances during the formation of a synthetic rabbit strain
Full text link[EN] In 1995, a synthetic rabbit strain ('2666') was formed at INRA for commercial meat purposesby crossing the INRA '2066' strain and the 'V' strain from the Polytechnical University of Valencia (Spain).The development of some reproductive traits and body weight at palpation of the '2666' does was studiedfrom the F1 (first generation cross) to the F4 generation in comparison with the 'V' does. This developmentwas quantified in terms of Dickerson's crossbreeding parameters. The base strains did not differ significantlyfor any of the studied traits, either overall or in their direct and maternal genetic value. F1 does exhibitedsignificant individual heterosis for body weight (5.5% of the parental average), pregnancy rate (13.3%),total born (18.3%), born alive (24.4%) and weaned (21.0%) per litter born. Concerning body weight, asignificant crossbred superiority over the 'V' line was retained in the F2 but not thereafter. The rate ofpregnancy showed no crossbred advantage from the F2 on. Concerning litter size traits, the benefit ofcrossbreeding was maintained until the F4, but at a lower magnitude than in the F1. Body weight andpregnancy rate exhibited maternal heterosis, while litter size did not. Direct epistatic losses were significantfor body weight, tended towards significance for pregnancy rate, but did not affect litter size. Overall, thecomparison between the synthetic strain and the founders was favourable to the synthetics.Brun, J.; Baselga, M. (2005). Analysis of reproductive performances during the formation of a synthetic rabbit strain. World Rabbit Science. 13. https://doi.org/10.4995/wrs.2005.514SWORD1
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
GENETIC RESPONSE TO SELECTION FOR REPRODUCTIVE PERFORMANCE IN A MATERNAL LINE OF RABBITS""
No full text[EN] An evaluation of genetic response on reproductive
traits was carried out in a line of rabbits selected for litter size at
weaning. The evaluation was performed comparing contemporary
does of generation 17 and 26, using cryopreservation techniques.
The direct response to selection between both generations was
O. 77±0.27 rabbits weaned/litter and there were favorable correlated
responses in total litter size at birth and born alive. There was a non-significan! response in prenatal traits, but the litter size results
imply response probably in foetal survival. The genetic trends were
also estimated using mixed model methodology and were higher
than the previous ones. Therefore, the repeatability animal model
and the genetic parameters used are unsuitable. Models taking
into account effects such as dominance need to be investigated.[FR] La réponse á la sélection a été estimée dans une souche de lapin
sélectionnée pour la taille de la portée au sevrage. L'estimation a
été obtenue en comparan! des femelles issues des générations
17 et 26, et rendues contemporaines par la cryoconservation. La
réponse di recte á la sélection est égale á O. 77±0.27 lapin sevré
par portée. Les réponses corrélées sur les nombre de lapereaux
nés totaux et nés vivants sont favorables. La réponse sur les caracteres mesurés avant la naissance n'était pas significative,
mais les résultats observés sur la taille de la portée impliquen!
une réponse probable sur la survie prénatale. L'évolution génétique
a aussi été évaluée en utilisant le modele mixte et l'estimation est
alors plus élevée. En conséquence, le modele animal avec
répétabilité et les parametres génétiques utilisés semblent ne pas
convenir. 11 faudrait tester des modeles intégrant par exemple la
dominance.This work was supported by CICYT project nº AGF2000-0595-C03-01García, M.; Baselga, M. (2002). GENETIC RESPONSE TO SELECTION FOR REPRODUCTIVE PERFORMANCE IN A MATERNAL LINE OF RABBITS"". World Rabbit Science. 10(2). https://doi.org/10.4995/wrs.2002.478SWORD10
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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