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Experimental motion analysis of human locomotion
Málková, Monika ; Vilímek, Miloslav (advisor) ; Goldmann, Tomáš (referee)
Title: Experimental motion analysis of human locomotion Objectives: The aim of this work is verification of the hypothesis that it is possible to identify humans using measurement of parameters of their gait taken from surveillance camera's records. Methods: In our thesis we used the method of comparison. The aim of the experiment is comparison of parameters measured in different trials of each subject under different conditions (different walking speeds, with or without clothes on, and using either 2D or 3D record), as well as comparison across different subjects. Results: We found that using a 3D record of human gait, it is possible to improve our capability of identifying them. We also found that it is necessary to compare either dressed subjects strictly among themselves or stripped subjects strictly among themselves, because otherwise the comparison is not meaningful. Furthermore, we found that using our geometrical methods, it is possible to deduce gait parameters from a 2D camera record when it comes to height of the subject, but not so for length of their step. Keywords: gait, identification, kinematic analysis, forensic biomechanics
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The duration of the defensive reaction to a sudden attack
Straus, Jiří
Reaction time research is an important parameter for the examination of possible human motor responses, especially in forensic biomechanics. Factors influencing the reaction time can be classified by many criterions. The most relevant theoretical and practical factors are alcohol, stimulating drugs, age, training, fatigue, subject's orientation towards stimulus, warning of incoming stimulus and psychical tension. Primary, we were interested in impairment of human's reaction time as a result of alcohol administration. This article refers to presentation of results of our pilot research project, which treats of the reaction time on random stimulus that requires complex motor response. We found no impairment up to 0,3‰ BAC, but overall relationship is expressed by quadratic regression.
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