1,720,967 research outputs found
Intra-positional and inter-positional differences in somatotype components and proportions of particular somatotype categories in youth volleyball players
No full textObjective(s). Main aim of this cross-sectional study was to analyse intra-positional, inter-positional differences in proportions of particular somatotype categories in youth volleyball players. Methods. Heath-Carter method was used to determine somatotype characteristics of 181 young female volleyball players (age 14.05 +/- 0.93, height 170.03 +/- 7.61 cm, mass 57.80 +/- 8.59 kg, body mass index 19.99 +/- 2.37 kg/m(2), somatotype 4.33-2.79-3.73 +/- 1.02-1.02-1.25). Dependent variables were playing position, player efficacy. Only 7 somatotype categories (of possible 13) were obtained. Results. By analysing intra-positional differences, a significantly higher frequency of somatotype categories dominated by the ectomorph component was established in a subsample of more successful players, and a significantly higher frequency of somatotype categories dominated by the endomorph component was found in a subsample of less efficient players. The most frequent somatotype category in all player positions in a sample of more efficient volleyball players is the balanced ectomorph. The smallest number of somatotype categories (only three) was obtained in the subsample of more efficient middle hitters. It indirectly indicates that the most stringent requirements for selection according to the body build are for that position. Similar small inter-positional differences were obtained in both subsamples. Ectomorph somatotype component was most pronounced in young middle-hitters, and endomorph in liberos. Small inter-positional differences in both subsamples are probably consequences of previous selection processes within the clubs. Conclusion. Results obtained in this study provide a clearer insight into inter-positional, intra-positional differences in somatotype categories of young female volleyball players
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
External Responsiveness of the SuperOpTM Device to Assess Recovery After Exercise: A Pilot Study
No full textPost-exercise recovery is a complex process involving a return of performance and a
physiological or perceptual feeling close to pre-exercise status. The hypothesis of this
study is that the device investigated here is effective in evaluating the recovery state
of professional cyclists in order to plan effective training. Ten professional male cyclists
belonging to the same team were enrolled in this study. Participants performed a 7-day
exercise program [D1, D4, and D7: low-intensity training; D2 and D5: passive recovery;
D3: maximum oxygen consumption (VO2Max) test (for maximum mechanical power
assessment only); and D6: constant load test]. During the week of monitoring, each
morning before getting up, the device assessed each participant’s so-called Organic
Readiness {OR [arbitrary unit (a.u.)]}, based on blood pressure (BP), heart rate (HR),
features of past exercise session, and following self-perceived condition. Based on its
readings and algorithm, the device graphically displayed four different colors/values,
indicating general exercise recommendations: green/3 = “you can train hard,” yellow/2
= “you can train averagely,” orange/1 = “you can train lightly,” or red/0 = “you should
recover passively.” During the week of research, morning OR values and Bonferroni
post-hoc comparisons showed significant differences between days and, namely, values
(1) D2 (after low intensity training) was higher than D4 (after VO2Max test; P = 0.033
and d = 1.296) and (2) D3 and D6 (after passive recovery) were higher than D4 (after
VO2Max test; P = 0.006 and d = 2.519) and D5 (after low intensity training; P = 0.033
and d = 1.341). The receiver operating characteristic analysis area under curve (AUC)
recorded a result of 0.727 and could differentiate between D3 and D4 with a sensitivity
and a specificity of 80%. Preliminarily, the device investigated is a sufficiently effective
and sensitive/specific device to assess the recovery state of athletes in order to plan
effective training
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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