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Analysis of dynamic strength of friction knots used in military climbing
Telvák, Radek ; Michalička, Vladimír (advisor) ; Braum, Zdeněk (referee)
Title: Analysis of dynamic strength of friction knots used in military climbing Objectives: The aim of this work is to determine the resulting impact force generated by selected friction systems at different values of the fall factor. To calculate what maximum values of auxiliary Reep cord length and maximum load weight can be achieved without system failure. Determine the correlation between the magnitude of the impact force and the slip length. Methods: This thesis describes an experiment in which the resulting impact force acting on a friction system at different drop factors was determined. A 6mm Reep cord and an 11mm rope and friction knots used in military climbing techniques were selected for analysis. Testing was carried out in a polygon on a drop tower. Each of the friction knots was subjected to 5 tests at the same fall factor. The individual knots were statistically compared with each other in terms of impact force and slip. Using direct proportionality, the maximum possible values of the auxiliary Reep cord length and the weight of the load were determined. A correlation analysis was used to establish a correlation between impact force and slip. Results: It was found that at all measured values of the fall factor, the Twist prusik achieved the lowest values of the resulting impact force...
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The influence of spinning on a time extension in the static apnea during free diving
Braum, Zdeněk ; Fiala, Miloš (advisor) ; Bažant, Filip (referee)
Title: The influence of spinning on a time extension in the static apnea during free diving Objectives: The objective of this work was to find out whether even a short and intensive training can have an affect on the increase of a vital lung capacity, on a time extension in the static apnea, and on a performance improvement during free diving. Methods: The search of available literature and its recherche. Measurement methods determination: digital stopwatch for the apnea, spirometer for the vital lung capacity, and a Sport-tester and a Borg scale for the spinning program. Data collection. Results: The statistical analysis of the values of a vital lung capacity and a static apnea before and after sports training Keywords: diving, vital lung capacity, spinning, apnea, free diving
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The influence of spinning on a time extension in the static apnea during free diving
Braum, Zdeněk ; Fiala, Miloš (advisor) ; Bažant, Filip (referee)
Title: The influence of spinning on a time extension in the static apnea during free diving Objectives: The objective of this work was to find out whether even a short and intensive training can have an affect on the increase of a vital lung capacity, on a time extension in the static apnea, and on a performance improvement during free diving. Methods: The search of available literature and its recherche. Measurement methods determination: digital stopwatch for the apnea, spirometer for the vital lung capacity, and a Sport-tester and a Borg scale for the spinning program. Data collection. Results: The statistical analysis of the values of a vital lung capacity and a static apnea before and after sports training Keywords: diving, vital lung capacity, spinning, apnea, free diving
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