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Biodynamic lighting
Andruška, Martin ; Skácel, Josef (referee) ; Šteffan, Pavel (advisor)
This master thesis is focused on designing a concept of a biodynamic tunable white luminaire for the interior capable of producing user defined output or simulating the conditions of natural exterior lighting. The thesis describes the physiological basis of human sensitivity to lighting and the consequences, as well as the principles of semiconductor radiation sources. Finally, it deals with methods of sensing the lighting conditions and describing the design and functions of the system elements and final implementation.
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Vliv vybraných faktorů na spánek
Brožová, Kateřina
The bachelor thesis deals with the factors that can influence human sleep. The thesis discusses the effects of stress, weather, caffeine, room temperature and lighting on human sleep. Part of the thesis is devoted to lighting - its evolution, distribution and its proper use in interior design. The thesis also discusses sleep, its importance, stages and possible sleep disorders, which can be caused, among other things, by light disrupting the circadian rhythm. Another section of this bachelor thesis deals with the effect of artificial and natural light on sleep. It describes both its negative and positive effects on the organism. The design of bed furniture with integrated lighting is based on these findings. The work is divided into two parts - theoretical and practical. The theoretical one focuses on the influence of selected factors on sleep, while the practical one deals with the actual design of bed furniture with integrated lighting and the measurement of sleep quality.
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The Importance of Circadian Rhythms in Humans with a Focus on Adolescents
Kolářová, Michaela ; Vančata, Václav (advisor) ; Ehler, Edvard (referee)
The aim of the presented diploma thesis is a detailed outline of the meaning of circadian rhythms in adolescence. Circadian rhythms appear in early childhood, but undergo many changes during lifetime. While in early childhood the waking and sleeping cycle shifts to an earlier time, during adolescence it is quite the opposite and the cycle is shifted a few hours later and in older age the cycle even returns to an earlier state. Adolescence is associated with the most significant changes and increased demands on study, independence and generally more overload at the expense of quality and adeqaute sleep, which not only causes circadian rhythms to dissipate and shift dramatically, which such as health. For adolescents, the delayed phase is naturally correlated with sexual development, with sleep patterns being controlled by the biological component. Respecting physiological changes in adolescence and striving for institutional changes seem to be the most appropriate therapies instead of forcing patterns basen on institutional and parental needs, which only undermines adolescent body chemistry, results in insufficient and poor quality sleep for functioning and healthy physiological development of adolescents.
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Eating habits of shiftworkers
KRATOCHVÍLOVÁ, Martina
The bachelor thesis contains a theoretical and a practical part. The theoretical part describes basic diet components, a large part is dedicated to circadian rhythm and its influence on our health. Health risks connected to shiftwork are also mentioned. Further, a hormone known as melatonin that plays a significant role in our sleep, is described. The objective of this bachelor thesis was to map out eating habits of people whose work is run in shifts. The survey was processed using a qualitative method. Data was collected using semi-structured interviews with questions prepared beforehand and a record of weekly diet plans. Interviews were carried out with 10 individuals of medical staff whose work run in 12 full-hour shifts. The results prove that individuals working in shifts include meat and dairy products most often as the source of protein. Protein intake is higher during day shift. Intake of carbohydrates most often comes from bread and side dishes that are a part of meals. Intake of legumes is seldom included in the respondents´ diets. During night shift, smaller portions are consumed and intake of liquids is higher during day shift. Out of the informants´ diet plans we found out that intake of fiber is low. Snacks usually consist of fruit, dairy products or bread and something. The survey has proven that lunch offer is taken advantage of by an insignificant number of informants, dinner is taken advantage of in a minimum of cases. We have also found out that most informants consume food up to midnight during night shifts and until the end of their shift they consume only liquids. Energetic drinks are not an important part of drinking regime in shiftwork. Coffee intake is higher during day shift. The results of this bachelor thesis may serve both, the lay and expert public. Creating an informative leaflet with ditary habit recommendations is a part of this thesis.
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Circadian changes of the cholinergic system in various areas of the central nervous system
Křížová, Monika ; Mysliveček, Jaromír (advisor) ; Jakubík, Jan (referee)
Muscarinic acetylcholine receptors type 4 are one of the five subtypes of metabotropic muscarinic receptors whose knockout led to disruption of the biorhythm represented by locomotion in female mice. In this thesis, we attempted to determine the biorhythmic activity of selected components of the cholinergic system in structures of the central nervous system which are suspected to regulate circadian locomotion. These selected structures were the striatum, motor cortex, thalamus, intergeniculate leaflet, subparaventricular zone and posterior hypothalamic area. Changes of muscarinic receptor density in wild type and M4 receptor knockout female mice were measured by using autoradiography throughout the day. In the striatum, motor cortex, and thalamus, the density of muscarinic receptors type 1 and the activity of acetyl- and butyrylcholinesterases were also measured by autoradiography and the Ellman's method. Rhythmic oscillations of muscarinic receptor density were observed in all structures selected in both types of mice. The main brain structure responsible for the differences in the biological rhythm of wild type and M4 receptor knockout mice was identified as the striatum and motor cortex region, where the percentage of M4 receptors was highest. Diurnal oscillations were also exhibited by...
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Sleep hygiene of students of Charles University FPES
Beranová, Tereza ; Majorová, Simona (advisor) ; Nováková, Pavlína (referee)
Title: Sleep Hygiene of Students of Charles University FPES Objectives: The aim of the bachelor's thesis was to find out to what extent students of bachelor's programs at Charles University FPES (Faculty of Physical Education and Sport) adhere to the principles of sleep hygiene. Methods: I used the poll method for data collection for the practical part of the bachelor's thesis. The poll of my own design was created via Google Forms. The data were converted to the Microsoft Excel 2010. The basic procedures of descriptive statistics were applied to process the data. The research was focused on a group of students of full-time bachelor's programs at Charles University FPES. Results: The poll results showed that most students only partially follow sleep hygiene. Only 12 (10.3 %) students out of 116 (100 %) participators adhere to almost all recommended sleep hygiene principles. For the rest of the students, it was recommended to eliminate negative factors affecting sleep. Keywords: sleep, insomnia, sleep disorders, regeneration, addictive substances, circadian rhythm, EEG
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The Importance of Circadian Rhythms in Humans with a Focus on Adolescents
Kolářová, Michaela ; Vančata, Václav (advisor) ; Ehler, Edvard (referee)
The aim of the presented diploma thesis is a detailed outline of the meaning of circadian rhythms in adolescence. Circadian rhythms appear in early childhood, but undergo many changes during lifetime. While in early childhood the waking and sleeping cycle shifts to an earlier time, during adolescence it is quite the opposite and the cycle is shifted a few hours later and in older age the cycle even returns to an earlier state. Adolescence is associated with the most significant changes and increased demands on study, independence and generally more overload at the expense of quality and adeqaute sleep, which not only causes circadian rhythms to dissipate and shift dramatically, which such as health. For adolescents, the delayed phase is naturally correlated with sexual development, with sleep patterns being controlled by the biological component. Respecting physiological changes in adolescence and striving for institutional changes seem to be the most appropriate therapies instead of forcing patterns basen on institutional and parental needs, which only undermines adolescent body chemistry, results in insufficient and poor quality sleep for functioning and healthy physiological development of adolescents.
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Circadian regulation of sleep during ontogenesis in humans
Grieblová, Adéla ; Sumová, Alena (advisor) ; Soták, Matúš (referee)
The circadian system has evolved as an adaptation to periodically changing conditions on Earth. In mammals, and therefore in humans, the circadian system consists of the central and perip- heral oscillators generating a circadian rhythm. One of the most significant process exhibiting circadian rhythm is the sleep-wake cycle. Sleep is regulated by cooperation of circadian and homeostatic process. There are changes in circadian regulation of sleep during ontogenesis in human. The changes mainly releate to chronotype, i.e., to the diurnal preferences of activity and sleep. In the first years of life, there is a typical morning chronotype. In the end of first decade of life, the circadian phase begins to delay and reaches its maximal eveningness during ado- lescence. In adulthood, the preference changes again toward morning chronotype and reaches extreme morningness in elderly. Changes in circadian regulation of sleep during ontogenesis depend not only on age, but also on sex. 1
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