1,721,007 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Effects of taper on swimming force and swimmer performance after an experimental ten-week training program
No full textPapoti, M., L.E.B. Martins, S.A. Cunha, A.M. Zagatto, and CA. Gobatto. Effects of taper on swimming force and swimmer performance after an experimental ten-week training program. J. Strength Cond. Res. 21(2):538-542. 2007. - The purpose of this research was to examine how an 11-day taper after an 8.5-week experimental training cycle affected lactate levels during maximal exercise, mean force, and performance in training swimmers, independent of shaving, psychological changes, and postcompetition effects. Fourteen competition swimmers with shaved legs and torsos were recruited from the Sao Paulo Aquatic Federation. The training cycle consisted of a basic training period (endurance and quality phases) of 8.5 weeks, with 5,800 m center dot d(-1) mean training volume and 6 d center dot wk(-1) frequency; and a taper period (TP) of 1.5 weeks' duration that incorporated a 48% reduction in weekly volume without altering intensity. Attained swimming force (SF) and maximal performance over 200-m maximal swim (Pmax) before and after taper were measured. After taper, SF and Pmax improved 3.6 and 1.6%, respectively (p < 0.05). There were positive correlations (p < 0.05) between SF and Pmax before (r = 0.86) and after (r = 0.83) the taper phase. Peak lactate concentrations after SF were unaltered before (6.79 +/- 1.2 mM) and after (7.15 +/- 1.8 mM) TP. Results showed that TP improved mean swimming velocity, but not in the same proportion as force after taper, suggesting that there are other factors influencing performance in faster swimming.21253854
Serum IGF-I, IGFBP-3 and ALS concentrations and physical performance in young swimmers during a training season
No full textIntroduction: The GH/IGF-I axis is a system of growth mediators, receptors, and binding proteins that regulate somatic and tissue growth; and it has been shown that exercise programs are related to the anabolic function of this axis.Objective: The aim of this study was to analyse the changes of serum IGF-I concentration and that of its binding proteins IGFBP-3 and ALS in adolescent swimmers at different stages of a training season, and compare them with physical performance parameters and body composition of the athletes. Material and methods: Nine male athletes, aged 16 to 19 years and -who trained regularly throughout the season, were included in this study. Serum IGF-I, IGFBP-3, and ALS concentrations were recorded before and after (pre x post) standardized training sessions during the different stages of a training season (extensive x intensive x tapering). Endurance in freestyle, anaerobic fitness in tied swimming (Peak Force and Average Force), body mass, fat percentage, and lean body mass were also analysed at the different stages of training in order to compare the changes of the IGF-I/IGFBP/ALS system with the physical performance and body composition of the athletes. Variations in the IGF-I/IGFBP-3-ALS system before and after a standardized training session, and at the different stages of training were analysed by the Wilcoxon and Friedman non-parametric tests, respectively. Significance was considered at 5%.Results: The results from this study demonstrate that IGF-I is sensitive to the acute and chronic effects of training, exhibiting biphasic behaviour throughout the season. The catabolic phase was characterized by a reduction in serum IGF-I concentrations during the intensive stage (Delta(IGF-I): - 4333 +/- 4732 ng/ml; P < 0.05) while the anabolic phase was marked by similar basal concentrations at the different stages of training and an increase in post-training serum IGF-I concentrations during the tapering stage (320 +/- 40; 298 +/- 36 and 359 +/- 94 ng/ml; P < 0.05). IGFBP-3 was only sensitive to the chronic effects of training, with a reduction in post -training serum concentrations during the intensive stage and an increase during the tapering stage (4.7 +/- 0.7, 4.6 +/- 0.4 and 5.0 +/- 0.7 mg/I; P < 0.05). No significant difference (P > 0.05) was observed in pre- or post -training IGFBP-3 concentrations (hq, Delta(IGFB-3)) at the different stages. ALS concentrations remained unchanged throughout the season, demonstrating that in adolescent athletes they are unaffected by the acute or chronic effects of swimming. Peak Force (25.0 +/- 63, 24.2 +/- 5.7 and 28.5 +/- 6.5 N; P < 0.05) and Average Force (10.3 +/- 3.6, 8.8 +/- 1.8 and 14.7 +/- 1.8 N; P < 0.05) followed IGF-I and IGFBP-3 variations, with a decrease during the intensive stage and a significant (P < 0.05) increase during the tapering stage. The body composition and cardiorespiratory condition of the swimmers did not vary significantly throughout the season, exhibiting behaviour independent of IGF-I or IGFBP-3.Conclusion: Serum IGF-I and IGFPB-3 concentrations have proven to be sensitive markers of training status and, thus, may be used as guides for coaches and athletes in the challenging task of modulating training intensity in young athletes. (C) 2016 Elsevier Ltd. All rights reserved
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Assessment Of Aerobic Capacity Through Blood And Ventilatory Responses In Four Different Ergometers [avaliação Da Capacidade Aeróbia Determinada Por Respostas Sanguíneas E Ventilatórias Em Quatro Differentes Ergômetros]
No full textThe objective of the study was to compare intensities of respiratory compensation point (RCP), anaerobic threshold at onset blood lactate accumulation (OBLA3,5), and anaerobic threshold at lactate abrupt increase (AnTLAC) determined in four different ergometers. Hence, eleven table tennis players (19±1 years) performed graded exercise tests on cycle ergometer, arm cranking ergometer, treadmill and specific table tennis test. Te respiratory response and lactatemia were measured during the tests. We did not find significant differences among RCP, AnTLAC and OBLA3,5 in arm cranking ergometer (63.4±4.8W, 66.9±4.5W and 64.5±6.1W, respectively), treadmill (11.4±0.4km.h-1, 11.3±0.3km.h-1 and 11.1±0.3km.h-1, respectively), and specific table tennis test (40.5±1.8bolas.min-1, 42.6±3.6bolas.min-1 and 42.8±5.6bolas.min-1, respectively). However, the OBLA3,5 (131.9±6.6W) was significantly lower than RCP (149.3±4.9W) and AnTLAC (149.3±4.7W) in the cycle ergometer. Strong and significant correlation coefficients were found in the specific test for all methods (r range 0.83 to 0.95), in arm cranking ergometer between RCP and OBLA3,5 (r=0.78), and on treadmill running between OBLA3,5 a n d A n T LAC (r=0.76). Therefore, we conclude that RCP, OBLA3,5 a n d A nT LAC seem to correspond to the same physiological phenomenon, mostly during specific table tennis test.153350360Heck, H., Mader, A., Hess, G., Mücke, S., Muller, R., Hollmann, W., Justifcation of the 4-mmol/l lactate threshold (1985) Int J Sports Med, 6, pp. 117-130Beneke, R., Methodological aspects of maximal lactate steady state-implications for performance testing (2003) Eur J Appl Physiol, 89, pp. 95-99Zagatto, A.M., Papoti, M., Gobatto, C.A., Validity of critical frequency test for measuring table tennis aerobic endurance through specific protocol (2008) J Sports Sci Med, 7, pp. 461-466Sotero, R.C., Cunha, V.N.C., Madrid, B., Sales, M.M., Moreira, S.R., Simões, H.G., Identifca-ção do lactato mínimo de corredores adolescentes em teste de pista de três estágios incrementais (2011) Rev Bras Med Esporte, 17, pp. 119-122Baron, B., Noakes, T.D., Dekerle, J., Moullan, F., Robin, S., Matran, R., Why does exercise terminate at the maximal lactate steady state intensity? 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Appl Physiol, 64, pp. 2622-2630Secher, N.H., Physiological and biomechanical aspects of rowing - implications for training (1993) Sports Med, 15, pp. 24-42Morel, E.A., Zagatto, A.M., Adaptação dos testes de lactato mínimo, potência crítica e limiar anaeróbio para avaliação da transição aeróbia-anaeróbia em protocolo específco para o tênis de mesa (2008) Rev Bras Med Esporte, 14, pp. 518-522Zagatto, A.M., Papoti, M., Caputo, F., Mendes, O.C., Denadai, B.S., Baldissera, V., Comparação entre a utilização de saliva e sangue para determinação do lactato mínimo em cicloergômetro e ergômetro de braço em mesa-tenistas (2004) Rev Bras Med Esporte, 10, pp. 475-480Pereira, R.R., Papoti, M., Zagatto, A.M., Gobatto, C.A., Validação de dois protocolos para determinação do limiar anaeróbio em natação (2002) Motriz, 8, pp. 63-68Meyer, T., Lucia, A., Earnest, C.P., Kindermann, W., A conceptual framework for performance diagnosis and training prescription from submaximal gas exchange parameters--theory and application (2005) Int J Sports Med, 26 (SUPPL. 1), pp. S38-S48Wasserman, K., Whipp, B.J., Koyl, S.N., Beaver, W.L., Anaerobic threshold and respiratory gas exchange during exercise (1973) J Appl Physiol, 35, pp. 236-243Zagatto, A.M., Miranda, M., Gobatto, C.A., Critical power concept adapted for the specific table tennis test: Comparisons between exhaustion criteria, mathematical modeling, and correlation with gas exchange parameters (2011) Int J Sports Med, 32, pp. 503-510Girard, O., Chevalier, R., Leveque, F., Micallef, J.P., Millet, G.P., Specific incremental field test for aerobic fitness in tennis (2006) Br J Sports Med, 40, pp. 791-796Roels, B., Schmitt, L., Libicz, S., Bentley, D., Richalet, J.P., Millet, G., Specificity of VO2MAX and the ventilatory threshold in free swimming and cycle ergometry: Comparison between triathletes and swimmers (2005) Br J Sports Med, 39, pp. 965-968Beneke, R., von Duvillard, S.P., Determination of maximal lactate steady state response in selected sports events (1996) Med Sci Sports Exerc, 28, pp. 241-246Tordi, N., Belli, A., Mougin, F., Rouillon, J.D., Gimenez, M., Specific and transfer effects induced by arm or leg training (2001) Int J Sports Med, 22, pp. 517-524Dekerle, J., Baron, B., Dupont, L., Vanvelcenaher, J., Pelayo, P., Maximal lactate steady state, respiratory compensation threshold and critical power (2003) Eur J Appl Physiol, 89, pp. 281-288Faude, O., Kindermann, W., Meyers, T., Lactate threshold concepts. How valid are they (2009) Sports Med, 39, pp. 469-490Matsumoto, I., Araki, H., Tsuda, K., Odajima, H., Nishima, S., Higaki, Y., Tanaka, H., Shindo, M., Effects of swimming training on aerobic capacity and exercise induced bronchoconstriction in children with bronchial asthma (1999) Torax, 54, pp. 196-201Macintosh, B.R., Esau, S., Svedahl, K., Te lactate minimum test for cycling: Estimation of the maximal lactate steady state (2002) Can J Appl Physiol, 27, pp. 232-249Kindermann, W., Simon, G., Keul, J., Te significance of the aerobic-anaerobic transition for the determination of work load intensities during endurance training (1979) Eur J Appl Physiol Occup Physiol, 42, pp. 25-34McDaniels, J., Durstine, J.L., Hand, G.A., Martin, J.C., Determinants od metabolic cost during sub maximal cycling (2002) J Appl Plysiol, 93, pp. 823-828Tokui, M., Hirakoba, K., Effect of internal power on muscular efficiency during cycling exercise (2007) Eur J Appl Physio, 101, pp. 565-57
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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