scholarly journals "A New Approach to Assess the Physical Demands of Young Tennis Players: Inertial Movement Analysis. Preliminary Data"

2019 ◽  
Vol 5 (2) ◽  
Author(s):  
Carlos Galé Ansodi
Keyword(s):  
Preliminary Data ◽  
Movement Analysis ◽  
Physical Demands ◽  
New Approach ◽  
Tennis Players

scholarly journals The Activity Profile of Young Tennis Athletes Playing on Clay and Hard Courts: Preliminary Data

2016 ◽  
Vol 50 (1) ◽  
pp. 211-218 ◽  
Author(s):  
Lucas Adriano Pereira ◽  
Victor Freitas ◽  
Felipe Arruda Moura ◽  
Marcelo Saldanha Aoki ◽  
Irineu Loturco ◽  
...  
Keyword(s):  
Physical Performance ◽  
Preliminary Data ◽  
High Intensity ◽  
The Body ◽  
Activity Profile ◽  
Red Clay ◽  
Tennis Players ◽  
Body Load ◽  
H 30 ◽  
Paired T Test

Abstract The aim of this study was to compare the kinematic characteristics of tennis matches between red clay and hard courts in young tennis players. Eight young tennis players performed two tennis matches on different court surfaces. The match activities were monitored using GPS units. The distance covered in different velocity ranges and the number of accelerations were analyzed. The paired t test and inference based on magnitudes were used to compare the match physical performance between groups. The total distance (24% of difference), high-intensity running distance (15 - 18 km/h) (30% of difference), the number of high-intensity activities (44% of difference), the body load (1% of difference), and accelerations >1.5 g (1.5-2 g and >2 g 7.8 and 8.1 % of difference, respectively) were significantly greater in clay court than hard court matches (p < 0.05). Matches played on the red clay court required players to cover more total and high-intensity running distances and engage in more high-intensity activities than the matches played on the hard court. Finally, on the clay court the body load and the number of accelerations performed (>1.5 g) were possibly higher than on the hard court.

scholarly journals Reconstruction Accuracy Assessment of Surface and Underwater 3D Motion Analysis: A New Approach

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Kelly de Jesus ◽  
Karla de Jesus ◽  
Pedro Figueiredo ◽  
João Paulo Vilas-Boas ◽  
Ricardo Jorge Fernandes ◽  
...  
Keyword(s):  
3D Reconstruction ◽  
Accuracy Assessment ◽  
Movement Analysis ◽  
Control Points ◽  
New Approach ◽  
3D Motion Analysis ◽  
Underwater Cameras ◽  
Homography Estimation ◽  
Rms Error ◽  
Planar Homography

This study assessed accuracy of surface and underwater 3D reconstruction of a calibration volume with and without homography. A calibration volume (6000 × 2000 × 2500 mm) with 236 markers (64 above and 88 underwater control points—with 8 common points at water surface—and 92 validation points) was positioned on a 25 m swimming pool and recorded with two surface and four underwater cameras. Planar homography estimation for each calibration plane was computed to perform image rectification. Direct linear transformation algorithm for 3D reconstruction was applied, using 1600000 different combinations of 32 and 44 points out of the 64 and 88 control points for surface and underwater markers (resp.). Root Mean Square (RMS) error with homography of control and validations points was lower than without it for surface and underwater cameras (P≤0.03). With homography, RMS errors of control and validation points were similar between surface and underwater cameras (P≥0.47). Without homography, RMS error of control points was greater for underwater than surface cameras (P≤0.04) and the opposite was observed for validation points (P≤0.04). It is recommended that future studies using 3D reconstruction should include homography to improve swimming movement analysis accuracy.

scholarly journals A New Approach to Keyboard Inputting Error Prevention and Increasing Inputting Productivity

2018 ◽  
Author(s):  
Lewis D. Eigen
Keyword(s):  
Preliminary Data ◽  
Negative Reinforcement ◽  
Error Rates ◽  
Software Suite ◽  
Error Prevention ◽  
New Approach ◽  
Spell Check ◽  
Beta Testing ◽  
Initial Concept ◽  
Made In

This article describes the initial concept and developments of a new approach to reducing the number of inputting errors that are made in working with computers and decreasing the time the inputter must spend correcting errors. The approach involves intercepting and correcting errors before they are designated as such by Spell Check and eliminating the need for the time and effort of Spell Check. The operating principles and concepts of this approach, called Super ErrorCorrect™, is described, along with a software suite, that enables the implementation and the testing of the approach. This paper reports on the changes and evolution that resulted from analysis and limited Beta Testing. The preliminary data shows that not only is the Super ErrorCorrect™ approach feasible, but substantial time is saved while error rates are reduced markedly. Some data also suggests that in addition to the time saved in not using Spell Check, there is a tendency for users to type faster as they do not get negative reinforcement when they type faster and make errors as the software fixes the error in real time. Researchers are invited to collaborate in further research and licenses to the technology and software are provided at no cost if research results will be publicly disclosed.

scholarly journals The effect of natural preferences on serving biomechanics: a new approach to the motor skills of tennis players

2021 ◽  
Vol 29 (84) ◽  
pp. 15-17
Author(s):  
Kaies Deghaies ◽  
Caroline Martin ◽  
Pierre Touzard ◽  
Cyril Brechbuhl ◽  
Jean Marc Duboscq ◽  
...  
Keyword(s):  
Motor Skills ◽  
Ball Speed ◽  
New Approach ◽  
Tennis Players ◽  
Impact Position ◽  
Natural Preference

Research has demonstrated the existence of two 'natural preference' profiles in running. The objective of this study was to determine the influence of the natural preferences of ground (with a "posterior and flexion" movement) and air (with an "anterior and extension" movement) on the ball speed and impact position during the service of 19 professional players. The results allow to propose a new reading grid of the service technique to consider the preferential motricity of each player while respecting the biomechanical principles 

scholarly journals Jumping to conclusions: the psychology of delusional reasoning

2011 ◽  
Vol 17 (5) ◽  
pp. 332-339 ◽  
Author(s):  
Philippa Garety ◽  
Daniel Freeman ◽  
Suzanne Jolley ◽  
Kerry Ross ◽  
Helen Waller ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Preliminary Data ◽  
Treatment Approach ◽  
Intensive Treatment ◽  
Limited Information ◽  
Psychotic Experiences ◽  
New Approach ◽  
Treatment Approaches ◽  
Jumping To Conclusions ◽  
New Treatment

SummaryDelusions are a key symptom of psychosis and they are frequently distressing and disabling. Existing treatments, both pharmacological and psychological, are only partially effective. It is important to develop new treatment approaches based on theoretically derived and empirically tested processes. Delusions are associated with a reasoning bias: the jumping to conclusions (JTC) bias involves gathering limited information to reach decisions. It is proposed that this bias influences appraisals of psychotic experiences leading to the formation and persistence of delusions. Existing treatments do not influence JTC. A new intensive treatment approach – ‘reasoning training’ – is described. It aims to encourage participants to gather information, consider alternative explanations for events and review the evidence before reaching a decision. Preliminary data suggest that it is possible to change the JTC bias and that this improves belief flexibility and may reduce delusional conviction. The concepts and methods of this new approach have implications for clinical practice.

scholarly journals Anti-metastatic Activities of Bibenzyls from Dendrobium pulchellum

2013 ◽  
Vol 8 (1) ◽  
pp. 1934578X1300800 ◽  
Author(s):  
Pithi Chanvorachote ◽  
Akkarawut Kowitdamrong ◽  
Thidarat Ruanghirun ◽  
Boonchoo Sritularak ◽  
Chutichot Mungmee ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Drug Development ◽  
Cancer Cells ◽  
Cancer Cell ◽  
Preliminary Data ◽  
Inhibitory Effect ◽  
Cancer Drug ◽  
New Approach ◽  
Cell Metastasis ◽  
First Time

Our investigation of the stem of Dendrobium pulchellum resulted in the isolation of four known bibenzyls, chrysotobibenzyl (1), chrysotoxine (2), crepidatin (3) and moscatilin (4). The present study reveals for the first time the ability of these four compounds to facilitate anoikis and inhibit the growth of lung cancer cells in anchorage-independent condition. The preliminary data obtained disclose the inhibitory effect on cancer cell metastasis of the isolated compounds, and provide an important new approach for cancer drug development.

scholarly journals Preliminary data from Valle Giumentina Pleistocene site (Abruzzo, Central Italy): A new approach to a Clactonian and Acheulian sequence

2016 ◽  
Vol 409 ◽  
pp. 182-194 ◽  
Author(s):  
Elisa Nicoud ◽  
Daniele Aureli ◽  
Marina Pagli ◽  
Valentina Villa ◽  
Christine Chaussé ◽  
...  
Keyword(s):  
Preliminary Data ◽  
Central Italy ◽  
New Approach
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