scholarly journals An Experimental Research on Microseismic Monitoring Technology in Detecting the Contact Time of Badminton Amateurs’ Lunge

2020 ◽  
Author(s):  
Yang Yang ◽  
Yingchun Cui ◽  
Wenfa Yan
Keyword(s):  
Experimental Research ◽  
Contact Time ◽  
Body Shape ◽  
Microseismic Monitoring ◽  
Skill Levels ◽  
Key Indicator ◽  
Floor Vibration ◽  
Research Objects ◽  
Similar Body ◽  
High Level

The fast and flexible characteristics of badminton determine the necessity of its lunge, and fast lunge will have an important impact on the results of the game in actual combat. In lunge evaluation, the contact time to the ground is a key indicator. This article selects two middle-aged male badminton amateurs with similar body shape and age， but different skill levels as the research objects to carry out comparative experiments. The microseismic equipment is used to record the floor vibration which is caused by the running of badminton amateurs in sports. The microseismic signals of lunge are processed and analyzed by MATLAB software. And we evaluate the pro and cons of various time to touch the ground from amateurs with different skill levels. The research found that 1. Microseismic technology can detect the contact time to the ground. 2. High-level badminton amateurs have obvious advantages in the footwork contact time. Microseismic technology has a certain feasibility as a tool for evaluating the footwork contact time of badminton.

scholarly journals An Experimental Research on Microseismic Monitoring Technology in Detecting the Contact Time of Badminton Amateurs’ Lunge

2021 ◽  
Author(s):  
Yang Yang ◽  
Yingchun Cui ◽  
Wenfa Yan
Keyword(s):  
Experimental Research ◽  
Contact Time ◽  
Body Shape ◽  
Microseismic Monitoring ◽  
Skill Levels ◽  
Key Indicator ◽  
Floor Vibration ◽  
Research Objects ◽  
Similar Body ◽  
High Level

The fast and flexible characteristics of badminton determine the necessity of its lunge, and fast lunge will have an important impact on the results of the game in actual combat. In lunge evaluation, the contact time to the ground is a key indicator. This article selects two middle-aged male badminton amateurs with similar body shape and age， but different skill levels as the research objects to carry out comparative experiments. The microseismic equipment is used to record the floor vibration which is caused by the running of badminton amateurs in sports. The microseismic signals of lunge are processed and analyzed by MATLAB software. And we evaluate the pro and cons of various time to touch the ground from amateurs with different skill levels. The research found that 1. Microseismic technology can detect the contact time to the ground. 2. High-level badminton amateurs have obvious advantages in the footwork contact time. Microseismic technology has a certain feasibility as a tool for evaluating the footwork contact time of badminton.

Xenosellidae, a new family of Janiroidea (Asellota: Isopoda:  Crustacea), for Xenosella coxospinosa gen. nov., sp. nov.,  from the marine bathyal of eastern Australia

Zootaxa ◽  
2005 ◽  
Vol 1085 (1) ◽  
pp. 21 ◽  
Author(s):  
JEAN JUST
Keyword(s):  
New Species ◽  
Body Shape ◽  
New Genus ◽  
New Genus And Species ◽  
South Eastern ◽  
Incertae Sedis ◽  
New Family ◽  
Eastern Australia ◽  
Similar Body ◽  
South Eastern Australia

A new genus and species of janiroidean Asellota, Xenosella coxospinosa, is described from the mid-bathyal slope off the coast of south-eastern Australia. Following a comparison of the new species to several families of broadly similar body shape, with emphasis on monotypic Pleurocopidae, a new family, Xenosellidae, is proposed for the new species. In the course of comparing relevant taxa, the current placements of Prethura Kensley in the Santiidae and Salvatiella Müller in the Munnidae are rejected. The two genera are considered to be incertae sedis within the Asellota superfamily Janiroidea pending further studies.

scholarly journals FEATURES OF SELF-ESTEEM AND ITS INFLUENCE ON THE EFFECTIVENESS OF COMPETITIVE ACTIVITY OF QUALIFIED TAEKWONDO ATHLETES

2021 ◽  
Vol 6 (2) ◽  
pp. 169-182
Author(s):  
Romoldanova Iryna ◽  
Vysochina Nadiia
Keyword(s):  
Female Athletes ◽  
Self Esteem ◽  
Young Athletes ◽  
Skill Levels ◽  
Observation Methods ◽  
Competitive Activity ◽  
Effectiveness Of Training ◽  
And Gender ◽  
High Level ◽  
First Time

Introduction. The article discusses the features of self-esteem in taekwondo athletes of various skill levels and gender. The important role of diagnostics of the level of self-esteem of taekwondo athletes in the process of purposeful preparation of athletes for international competitions is pointed out. The interrelation of self-esteem with the effectiveness of competitive activity of qualified taekwondo athletes is shown.Aim is to study the level of self-esteem of taekwondo athletes of various qualifications and to establish its relationship with the effectiveness of training and competitive activity of athletes.Material and methods: analysis of literary sources and Internet, expert survey, pedagogical observation,methods of psychodiagnostics, methods of mathematical statistics.Results. It was found that more experienced taekwondo athletes who train in the second and more Olympic four-year cycle have a higher level of self-esteem in comparison with young athletes who are preparing for the Olympic Games for the first time. The lowest level of self-esteem (63.10 ± 11.34, p<0.05) was observed in young athletes who are preparing for the first time for responsible international competitions.Experienced male and female athletes had approximately the same high level of self-esteem manifestation (p> 0.05). Statistically significant correlations between the level of self-assessment of taekwondo athletes and the effectiveness of their competitive activity were established. Athletes with a higher level of self-esteem were distinguished by higher rates of impact efficiency (%) during performance in real competition conditions. Conclusion. The importance of research and further correction of the level of self-esteem of taekwondo athletes in the process of training athletes in the framework of four-year Olympic cycles is emphasized.

Coaches’ perceptions of innovation programs of the Royal Spanish Tennis Federation

2021 ◽  
pp. 174795412110355
Author(s):  
Miguel Crespo ◽  
Dolores Botella-Carrubi ◽  
Jose Jabaloyes
Keyword(s):  
Professional Development ◽  
International Competitiveness ◽  
Continuous Professional Development ◽  
Innovation Strategy ◽  
Years Of Experience ◽  
Skill Levels ◽  
Coach Education ◽  
Education Project ◽  
Item Questionnaire ◽  
High Level

This research studied the coaches’ perceptions of the innovation programs of the Royal Spanish Tennis Federation (RFET) during 2016-2020. The RFET is one of the most relevant national federations in Spain both in terms of results at the highest levels of the game as well as in terms of participation and grassroots tennis. Coaches are considered relevant stakeholders of any sport federation due to their role in delivering the sport. A 29-item questionnaire adapted to tennis was completed by 132 certified coaches RFET members which had different years of experience and coached players of various skill levels. Results showed significant differences between the coaches with more than 20 years of experience as they perceived more rivalry between regional federations in the access to grants and more international competitiveness at high-level tennis as compared to their less experienced colleagues. Coaches also considered that the COVID-19 pandemic had negatively affected the innovation strategy and capability of the organization. They identified a grassroots initiative and a coach education project as the two most valued innovative programs implemented by the RFET in the period. These last findings coincide with those from previous research and highlight the relevance of providing coaches with clear player development guidelines and opportunities for continuous professional development through education. It can be concluded that federation leaders should consider the coaches’ perceptions on their innovation programs. This will assist them to better provide initiatives that will satisfy their needs and improve the effectiveness of their federations.

scholarly journals The image of training and development consultancy in South Africa

1985 ◽  
Vol 16 (4) ◽  
pp. 161-170
Author(s):  
F. E. Botha ◽  
J. H. Owens
Keyword(s):  
South Africa ◽  
South African ◽  
Service Sector ◽  
Training And Development ◽  
Correct Identification ◽  
Manufacturing Companies ◽  
Skill Levels ◽  
Grid Technique ◽  
Training Programmes ◽  
High Level

The objective of this research was to establish the current image of training and development consultancy in South Africa in relation to the ideal as perceived by their clients. In view of the critical shortage of high-level manpower it was considered important to establish whether this service sector is effectively assisting organizations in developing their management to the required skill levels. Based on a survey of the literature on previous image studies, the research methodology combined the measurement of image by using a structured questionnaire with unstructured, subjective comment to arrive at a conclusion. The Repertory Grid technique was used to generate constructs for the semantic differential scale used in the questionnaire. This questionnaire was administered to training/personnel officials of a sample of manufacturing companies in the PWV area The responses to the questionnaire were analysed by means of basic descriptive statistics, factor analysis and t tests. Certain image dimensions were highlighted, and the results showed that numerous discrepancies existed between the image of training and development consultants and the perceived ideal. It was concluded that in order to effectively assist in alleviating the shortage of high-level manpower, training and development consultants should strive towards improving their analysis of problems, the correct identification of training needs and the customization of the training programmes to match specific South African corporate and cultural needs.

Intelligent Approach to Floor Vibration Control

2005 ◽  
Author(s):  
Janice L. Martell ◽  
Arya Ebrahimpour ◽  
Marco P. Schoen
Keyword(s):  
Cantilever Beam ◽  
Human Perception ◽  
Shopping Mall ◽  
Optimal Placement ◽  
Sensors And Actuators ◽  
Control Approach ◽  
Novel Approach ◽  
Floor Vibration ◽  
High Level ◽  
Floor System

Genetic Algorithms (GAs) have been used to solve a multiple of engineering problems with the civil engineering applications ranging from optimal placement of sensors and actuators on structures to pipeline layouts. GAs are especially useful in finding optimal solutions to problems that have many parameters with complex search spaces and a high level of interaction among the describing parameters. The novel experimental control approach presented in this paper uses a GA and a piezoelectric actuator to control the vibration of an aluminum cantilever beam. This set-up is based on a floor vibration problem, where the human perception of vibration dictates the sensitivities in the cost function of the GA. Lightweight floors can be excited by occupant activities such as walking, jumping and dancing. Humans are especially sensitive to vibrations in the range of 4 to 8 Hz. The occupancy of a floor system — whether the floor is used in an office, a shopping mall, or a ballroom — determines the degree to which humans are annoyed by the vibration. In this paper, the GA based control limits the peak acceleration within a predefined bandwidth. Since the cantilever beam has a higher natural frequency than a lightweight floor system a bandwidth of approximately 1.6–15.9 Hz (10–100 rad/s) is used as the frequency range to control. The control to be designed will be a genetic algorithm-robust controller. The analytical results indicate that this novel approach works well.

scholarly journals Effectiveness assessment of different methods of indium leaching from mobile phone screens

2020 ◽  
Vol 161 ◽  
pp. 01077
Author(s):  
Anastasiia Chugainova ◽  
Larisa Rudakova
Keyword(s):  
Mobile Phone ◽  
Experimental Research ◽  
Contact Time ◽  
Electronic Waste ◽  
Adverse Impact ◽  
Chemical Reagent ◽  
Solid Matter ◽  
The World ◽  
Effectiveness Assessment

The amount of electronic waste is growing annually all over the world, today it is almost 45 million tons. Less than 20% of electronic waste is being decontaminated and recycled. The rest is being taken to landfills or to places which are not supposed to store hazardous waste. This increases the adverse impact on the environment due to the fact that the waste consists of over 50% of hazardous components. At the same time, it also contains rare and expensive metals including indium. To extract indium from electronic waste it is necessary to justify the method of leaching. For this purpose research on leaching of indium from mobile phone screens has been done using various acids and parameters of the leaching process. As a result of the analysis, 6 methodologies were tested with various acid concentrations, the contact time of solid matter with a chemical reagent and temperature. The results of experimental research on the determination of metal concentration in mobile phone screens and the analysis of methods on indium leaching from mobile phone screens into a solution for further research are presented.

Synthesis of soft N-donor isoPentyl-BTBP and study on its removal of actinides from high level liquid waste

2020 ◽  
Vol 108 (6) ◽  
pp. 425-431
Author(s):  
Shunyan Ning ◽  
Jie Zhou ◽  
Shichang Zhang ◽  
Wei Zhang ◽  
Yuezhou Wei
Keyword(s):  
Adsorption Kinetics ◽  
Contact Time ◽  
Porous Silica ◽  
Liquid Waste ◽  
Polymer Support ◽  
High Level Liquid Waste ◽  
Reduced Pressure ◽  
The Stability ◽  
High Level ◽  
Excellent Stability

AbstractTo directly separate actinides from high level liquid waste (HLLW), a novel molecule, i. e. isoPentyl-BTBP (6,6′-bis(5,6-bis(4-methylpentyl)-1,2,4-triazin-3-yl)-2,2′-bipyridines) was synthesized and characterized. A kind of isoPentyl-BTBP/SiO2-P adsorbent was obtained by impregnating isoPentyl-BTBP into porous silica/polymer support particles SiO2-P under reduced pressure. The effect of HNO3 concentration, contact time on the adsorption of isoPentyl-BTBP/SiO2-P towards 241Am(III) and 239Pu(IV) was studied. And the stability of isoPentyl-BTBP/SiO2-P in HNO3 medium was also evaluated. It turned out that isoPentyl-BTBP/SiO2-P had much higher affinity for 241Am(III) and 239Pu(IV) over FP elements in 3 M HNO3, fast adsorption kinetics towards 239Pu(IV), excellent stability in HNO3 medium, and should be a very promising adsorbent for separating 239Pu(IV) and 241Am(III) from HLLW.

A Description of Academic Work and Student Performance during a Middle School Volleyball Unit

1987 ◽  
Vol 7 (1) ◽  
pp. 22-37 ◽  
Author(s):  
Kathy C. Graham
Keyword(s):  
Student Performance ◽  
Motor Skill ◽  
Performance Outcomes ◽  
Teacher Education Programs ◽  
Physical Education Class ◽  
Skill Levels ◽  
Lesson Analysis ◽  
Task Practice ◽  
High Level

This article describes the movement tasks (Rink, 1985) in which students engaged during a 14-lesson volleyball unit in an eighth-grade physical education class, and the differential motor skill responses of high- and low-skilled target students during the practice of these tasks. Audio and videotaped records were made of each lesson. Analysis focused on the identification of the movement tasks that were verbally presented by the teacher during the lessons, the determination of students’ level of engagement in these tasks, and the frequency and rate of motor skill responses/successful motor skill responses during task practice for three high- and three low-skilled students. Thirteen major movement tasks were identified that formed a simple to complex progression of activities. A high level of consistent student engagement in tasks was observed, as well as differential performance outcomes for students of high/low skill levels. The results reveal the complexity of providing appropriate instruction for different skill levels in a class. Implications for research and teacher education programs are discussed.

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