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Radioactivity of the rock and the environment in selected underground areas and its impact on human health
Thinová, Lenka ; Matolín, Milan (advisor) ; Holý, Karel (referee) ; Neznal, Martin (referee)
The thesis is focused on measurement and assessment of absorbed doses of radiation in caves of the Czech Republic, out of which some exhibit high activity concentration of radon in air. This thesis presents an analysis and recommendations based on measurement results obtained in the underground caves over the past 10 years. The focus is on defining the sources of irradiation within the cave environment (and in areas used for speleotherapy), considering their potential health effect, including the variable dependence of external and internal irradiation influences. All of the measurements had as an objective to verify, and where possible improve, the existing methodology for assessing and calculating the dose from radon in underground spaces. The main issue that had to be resolved was whether a numerically specified cave factor value is applicable to all underground areas. The research measurements were carried out in all available show caves and in several underground areas, and were based on the initial results from an aerosol measurement campaign. Two caves (the Bozkov Dolomite Caves and the Zbrašov Aragonite Caves) were selected for advanced long-term measurements. A large number of long-term and short-term studies were carried out. The most important results for cave environments were: the...
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Computer games addiction
Nejepínský, Adam ; Pavlíček, Antonín (advisor) ; Matuštík, Ondřej (referee)
This bachelor thesis deals with the problem of computer games addiction. The attention is paid mainly to on-line games for more players. The purpose of this thesis was to describe this problem and to check - through questionnaire investigation - if the addiction to computer games and the impacts connected with the games really deserve excessive experts and laics attention. The thesis has two parts -- theoretical and practical ones. The theoretical part describes the possibilities of diagnosing the on-line games addiction and digests the up to date knowledge and opinions of the expert public. Furthermore the readers are acquaint with the computer games, with their attractiveness for the players and with the effects, which are connected with this specific addiction - aggressiveness, health impacts, social effects. In the practical part the attention is paid to the results of the questionnaire investigation, which was focused on the players of the most hazardous playing genre from the dependence point of view -- the MMORPG (Massive Multiplayer Online Role Playing Games). Two methods were used for determining the percentage of the addicted players. Furthermore the practical part proves the hypotheses dealing with the aggressiveness of the MMORPG players and with the positive impacts of the computer games. Thanks to the theoretical and practical parts, the thesis confirmed that uselessly too much attention is paid to the computer games addiction, because the most negative effects were disproved or at least questioned. The practical part demonstrated among other that for the time being the diagnostic methods are not on such a level so as to be able to identify the problematic persons with certainty.
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Health and Social Impacts of Drug Abuse in Central Bohemia Region
VĚTROVSKÁ, Lucie
The bachelor degree thesis deals with some aspects of drug addiction and long-term drug abuse and with related impacts and risks that affect health and social situation of drug addicts ? clients of low-threshold contact centers in the Central Bohemian region. The theoretical part of the thesis describes general attributes of drug abuse, development of addiction, stages of the abuse and approaches used worldwide to interpret the issue and approaches to its practical solution. It also outlines principles that form the basis of the system of social and therapeutic work with this target group and a current overview of services provided to drug addicts. The practical part contains results from a qualitative research and their evaluation; the research used personal statements of long-term drug users. The objective of the research was, among other things, to expand the notion that the majority society has of the subculture of drug addicts and to contribute to the understanding of the heart of health and social problems of this group of people, their views, attitudes and potential ways out from their current situation.
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