1,720,977 research outputs found
RELATIONSHIP OF MOTIONS BETWEEN THE ARM AND THE LEGS IN THE DIVING MOTION OF SOCCER GOALKEEPERS
Full text linkThe purpose of this study was to clarify the relationship between the hand movement of the goalkeeper (GK) and the velocity of center of gravity (CG) in diving motion towards various heights and distances. Three male university GKs dived towards the shot. Three male university forward players performed instep kicking to twelve shot areas by forward dribbling. Three-dimensional (3D) coordinates of the body landmarks and ground reaction forces were obtained with a 3D motion capture system and two force platforms. The novel findings in this study were summarized as follows: (1) GKs changed not only the height of their CG but also the motions of their trunk and arm according to the shot heights; (2) exerting elbow joint torques is important for GKs to dive towards the near upper and near middle places; and (3) it is assumed that not only accelerating the CG but also the trunk and arm motions are necessary for the evaluation of diving skills for GKs
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
BIOMECHANICAL RELATIONSHIP BETWEEN THE GOALKEEPER’S MOTIONS AND THE KICKER’S MOTIONS IN SOCCER
Full text linkThe purposes of the study were (1) to identify the relationship between kicking motion of kickers and diving motions of goal keepers (GKs), and (2) to investigate the knowledge which can anticipate the moving direction after the preparatory motion from the kicking motion. Fourteen collegiate male GKs and 11 collegiate outfield players participated in this study. The mimic real shooting situation was captured with motion capture systems. The primary findings were: Regardless of the shot direction (rightward and leftward), the motion timing of preparatory motion is similar. The GKs started jumping at the same time as grounding of kicker’s support leg or immediately after hitting the ball. In addition, it is thought that the GKs have already judged the shot direction quickly while they were jumping because they had watched the kickers’ movement in approaching phase
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
BIOMECHANICAL ANALYSIS OF SAVING MOTION FOR SOCCER GOALKEEPERS FOCUSED ON THE FUNCTION OF LOWER EXTREMITIES
Full text linkThe purpose of this study was to clarify the function of the lower extremities during the saving motion of a goal keeper (GK). Eleven male university GKs dived toward a ball thrown 3.5 m ahead. Three-dimensional (3D) coordinates and ground reaction forces were obtained with a 3D motion capture system (250 Hz) and 2 force platforms (1000 Hz). The novel findings in this study are summarized as follows: (1) hip extension of the contralateral side leg to the ball is an important motion in the Pre phase and (2) exertion of extension torque at the hip in the early Transition phase has an important role for controlling backward leaning of the thigh during the saving motion
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