1,720,987 research outputs found
Rapid weight loss alters muscular performance and perceived exertion as well as postural control in elite wrestlers.
No full textAIM:
The aim was to assess the effects of rapid decline of body mass on postural control, muscular performance and rating perceived exertion in elite free style wrestlers.
METHODS:
Ten high-level wrestlers (age: 19.3 ± 2.5 years, height: 175.7 ± 4.9 cm, body mass before dieting: 77.16 ± 11.94 kg) are included in the present study. Diet was monitored for all the athletes. Athropometric measurements and a variety of functional tests such as isometric hand grip strength (IHG) and isometric back strength (IBS) with dynamometers, dynamic postural control (DPC) with star excursion balance test, and rating of perceived exertion (RPE) to a standard exercise of knee pushups, were performed before and after diet completion.
RESULTS:
The diet was based on food restriction and dehydration. Body mass, lean body mass and body water significantly decreased (P<0.001; P<0.004, P<0.001 respectively). There was no significant decrease in fat mass (P<0.061). Furthermore, IHG and IBS significantly decreased (P<0.001). DPC significantly altered with the left supporting leg in two positions of the right leg (posteromedial, P<0.038; posterior, P<0.012). At last, RPE significantly increased (P<0.001).
CONCLUSION:
Previous studies showed that the rapid decline of body mass affects health and muscular and energetic performance while the present study highlights that it also alters perceived exertion and dynamic postural control
Relationships between high intensity running and outcome of technical-tactical skills in professional soccer players during match play
No full textThis study aimed to investigate the relationships between high-intensity activities (HIA: speed, acceleration,
Metabolic Power) and the outcomes of some technical-tactical skills in professional soccer players (n=610, age 26.8±7.0)
during 50 games of the Italian “SERIE A” season 2013-2014. The analysis was carried out through a semi-automatic match
analysis video-system. Each technical skill was automatically recognized and the number of events that overcame the threshold
values we set as significant for high intensity activities, within 5s before the execution. Shots on goal showed that the HIA
might be a discriminant factor in the outcomes (71.1% Success vs 61.5% Not Success, χ2 test, p<0.001). Crossing is clearly
influenced by one preceding HIA (p<0.001). This study provides important insights referring to the different physical
components occurring before performing a technical skill, highlighting the need of a close cooperation among coaches and
physical trainers when assessing a match and designing the training programs
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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