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Bidirectional pneumatic stepper motor
Veselý, Václav ; Pavlík, Jan (referee) ; Kolíbal, Zdeněk (advisor)
The diploma thesis Bidirectional pneumatic stepper motor concentrates on a step shaft rotation in the presented scheme of a kinematic mechanism. The introductory research part of the diploma thesis lists various types of pneumatic components and the analysis of elements in pneumatic circuits is provided. The following section of the thesis concentrates on designing a new scheme of a pneumatic stepper and construction of a functional mock-up. The final part of the diploma thesis offers a summary and final evaluation of the design and offers subsequent alterations for its further usage.
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A comparison of chandge of direction speed and reactive agility in football
Procházka, Vladimír ; Hojka, Vladimír (advisor) ; Kaplan, Aleš (referee)
Title: A comparison of Change of direction speed and reactive agility in football Objectives: The aim of the thesis is to determine the level of skill of football players in agility and change of direction speed. Also to find out whether these two abilities correlate with each other, if the best players in agility also achieve the best results in tests focused mainly on change of direction speed and which components distinguish these two abilities from each other. Method: By using metaanalysis we first define the parameters of individual performance in football, its requirements and needs at the present time, the importance of change of direction speed and agility for football performance. At the same time, we will determine the differences between the environment and preparation of football players in the Czech republic and abroad. I would like to describe here the components and sub-components of performance in agility and finally introduce the differences between tests focused on change of direction speed and reactive agility. Key words: Agility, football, change of direction speed, reactive agility
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Bidirectional pneumatic stepper motor
Veselý, Václav ; Pavlík, Jan (referee) ; Kolíbal, Zdeněk (advisor)
The diploma thesis Bidirectional pneumatic stepper motor concentrates on a step shaft rotation in the presented scheme of a kinematic mechanism. The introductory research part of the diploma thesis lists various types of pneumatic components and the analysis of elements in pneumatic circuits is provided. The following section of the thesis concentrates on designing a new scheme of a pneumatic stepper and construction of a functional mock-up. The final part of the diploma thesis offers a summary and final evaluation of the design and offers subsequent alterations for its further usage.
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Velocity and agility skills in football
Červenka, Daniel ; Zahálka, František (advisor) ; Kokštejn, Jakub (referee)
Title: Velocity and agility skills in football. Objectives: The aim of the study was to evaluate the velocity of movement of players due to the change in direction. Assessment of the direction changes when moving to a successful test result. Mutual comparison of the decelaration and acceleration at a given distance. Methods: Measured group consisted of 15 players with these athropometric values (age = 17-18 years, height = 178 ± 4.58 cm, weight = 72 ± 2.35 kg). Players completed the warm-up prior to testing (activation stretching, stretching, warm up and subsequent motion game). Measured tested portion was 5m, followed by turning on the predefined leg and running backwards to the photocell gate. Each player completed 2 attemps on the right and 2 attemps on the left leg. Method for evaluating the kinematics used 2D video analysis. For video processing software was used Virtual Dub 1.4 (VirtualDub.org) cut processing records mileage and kinetic analysis was performed using software, Bio TEMA (ImageSystems Ltd., Sweden). Results: The results are as follows : third player had the fastest time in all attempted turns 5,76 m/s. The best result turning on the left had the twelve player who reached 5,54 m/s. In conclusion i would like to concentrate on the speed component after a difficult coordination...
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