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Reaction time of Persons Influenced by Alcohol
Ohera, Adam ; Bucsuházy, Kateřina (referee) ; Semela, Marek (advisor)
This thesis is focused on the issue of reaction time of those people who are affected by alcohol. The thesis is divided into two main parts, the first part is focused on the research of the present state and it submits the theoretical background related to the topic of this thesis. The second part describes both the experiments related to the reaction time of the people affected by alcohol and the evaluation of the results of such measurements.
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Drivers reaction time analysis in regular road traffic
Florek, Matej ; Bilík, Martin (referee) ; Belák, Michal (advisor)
This diploma thesis focuses on driver`s reaction time in real road traffic conditions. The reaction time topic foundations are covered in the introduction as well as the motivation and brief application possibilities of the obtained results. The literature review is focused on history of developing different approaches of evaluation and terminology. For complex understanding it provides basic information about perception forms which are important parts of reaction time. The experiment was designed based on past studies review in order to get real data describing reaction time of chosen stimuli. Obtained data were analysed, partially processed values were compared with predicted results based on other researches, than integrated into general values of reaction time.
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Determination of duration that driver needs to assess the situation behind the vehicle in course of turning or overtaking manoeuvres.
Belák, Michal ; Rábek,, Vlastimil (referee) ; Kolíbal, Zdeněk (referee) ; Semela, Marek (advisor)
The dissertation thesis deals mainly with determining of the duration that driver needs to assess the situation behind his vehicle at manoeuvers of turning and overtaking, based on the measurements made in real road traffic. These are common and frequent driving manoeuvers, which the driver performs while driving the vehicle in regular road traffic. For their safe execution the driver needs to have sufficient amount of information about the situation around the vehicle and especially behind the vehicle. This information can driver usually gain from devices for indirect vision, most often rear view mirrors. The time thus defined, suitable e.g for the needs of forensic engineering applications for the analysis of road accidents, has not been studied in detail yet. For the purpose of its determination, therefore, an extensive analysis of the current state of problematics related to the indirect vision from the vehicle was carried out. There were formulated influences on the time duration and with this related characteristics of humans as a part of the driver-vehicle-environment system in the thesis. The characteristics of human perception were investigated and the problematics of reaction time was discussed. Existing research focused on the duration of rear view mirrors glances was analyzed and possible methods of its measurement in detail were presented by author. Based on this, an experiment was designed and realized, the time necessary for rear view mirror glances was defined by the author. The results enable to quantify the time that the driver needs for assessing the situation behind the vehicle in connection of turning, overtaking and other driving manoeuvers when the driver needs to change the driving direction. The conclusions showed that the time needed to evaluate the situation behind the vehicle by means of the rear-view mirrors does not normally exceed duration 1 second.
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Analysis of the Reaction Time of a Driver Influenced by Selected Distracting Stimuli
Černohorská, Magda ; Semela, Marek (referee) ; Bucsuházy, Kateřina (advisor)
The diploma thesis deals with the analyses of food consumption influence on driver´s perception reaction time. It describes the food and drink consumption while driving, factors influencing driver´s performance, activities disturbing the driver, foreign researches and studies aimed at distracting stimuli. Practical part of the thesis is focused on driving tests of chosen driver of certain age group in current traffic, interpretation and evaluation of reaction times while driving with no distracting stimuli comparing to driving influenced by food consumption. All the data are concluded in the summary where it´s confirmed that reaction times are significantly prolonged when drivers have a snack while driving a vehicle.
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Testing of Transformer Differential Protection
Judas, Jan ; Těžký, Jiří (referee) ; Orságová, Jaroslava (advisor)
My bachelor thesis deals with the protection of a transformer, the main focus of the thesis is the differential protection of a transformer, the principle of its function, stabilization and the operating characteristic. I suggested a way of measuring the operating characteristic of the protection SPAD 346 C (developed) by ABB company. As far as measurement is concerned, I used the testing device TZO3, which was, as well as the tested protection, configurated by a computer, into which the results of single measurements were put. The testing was performed via a kind of a test known as ,,TREND“ test for 3 various configurations of operating characteristic of protection and each measurement was scaled for 2 different ,,TREND“ testings. Two marginal operating characteristics were configurated and the third characteritic was configurated approximately between 2 marginal configurations . An error in the calculations of measurement was shown. Since there were two ,,TREND“ tests of steepness performed, there was a calculation of reaction time of protection conducted/performed as well.. All measured and calculated data were processed to graphs in order to illustrate differences among single measurements. I also provided explanations and calculations of possibilities of elimination of increase of electric current within reaction time of protection at steeper increase of ,,TREND“ test.
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Remanent magnetism of electromagnets of DC contactors
Horký, Jakub ; Píška, Jakub (referee) ; Šimek, David (advisor)
The master thesis is focused on a remanent magnetism of electromagnets of DC contactors. In the first part of the thesis deals with the formation of a magnetic field in different kinds of materials, description of their magnetization and sorting. The next part is focused on the principle and history of an electromagnet. Negative effects and remanent induction of the contactor are described in the end of the theoretical part. The second part is a practical part. First, the reaction times were measured on a pair of DC contactors. Using the obtained data, an electronic circuit was designed to minimize the difference in switching times of the given DC contactors.
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Measurement of Reaction Time and Attention
Oravová, Pavlína ; Provazník, Ivo (referee) ; Sekora, Jiří (advisor)
The semesters thesis is focused on Measurement of Reaction Time and Attention. Part of this work is a definition of reaction time and factors influencing reaction time. Measuring reaction time in context of the theory of intelligence C-H-C is described together with this theory. There are included related tests, specifically Stroop test, Flanker test, Go/No-go test and N-back test. Next there is mentioned online problematics containing hardware and software delays and diagnostic and measuring of the network. The last part of the work is dedicated to a practical part.
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Reaction time analysis on the basis of measurements in regular road traffic
Bilík, Tomáš ; Bucsuházy, Kateřina (referee) ; Belák, Michal (advisor)
This diploma thesis deals with driver’s reaction time in regular road traffic. The theoretical part of this work focuses on reaction time, such as various definitions, structuring of reaction time, methods of measuring or publications made by other authors. The practical part of this diploma thesis includes proposal and realization of experiment, based on analysis of the current state by the author of this diploma thesis, which focuses on driver’s reaction time in regular road traffic (various traffic situations). At the end, the practical part presents the results evaluation based on various traffic situations or headway.
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Analysis of the Usual Time of a Driver Observing Specific Objects
Fujačková, Hedvika ; Semela, Marek (referee) ; Bucsuházy, Kateřina (advisor)
This diploma thesis focuses on drivers of motor vehicles and the usual time they spend by specific objects. The theoretical part of the thesis brings an overview of literature on human perception. The eye-tracker is defined here as the instrument used for scanning the movements of the drivers eyes, here are also named its types and its applications in various fields of life. Finally, this part deals with the advertisements placed alongside roads acting as distractive elements. The experimental part builds upon the collected video recordings and offers an analysis of drivers’ observations of outdoor advertisements that attract their attention, mainly billboards.
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Device for measuring of the reaction time
Bohuš, Michal ; Kolářová, Jana (referee) ; Balogh, Jaroslav (advisor)
The aim of this bachelor thesis was become acquainted with human reaction time,its measurements and use. Part of the project was to build a device that measures reaction time of audio-visual stimulus. The device consists of stimulating and controlling parts. Audio-visual stimuli are scanned and controlled by microcontroler ATmega 16. Based on the obtained reaction time evaluate reaction time of measured entity.
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