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Perception of body image in children
Pelikánová, Gabriela ; Vařeková, Jitka (advisor) ; Křivánková, Markéta (referee)
Title: Perception of Body schema in children Objectives: The aim of the thesis paper on the Perception of Body schema in children is to study the influence of sex and exercise on the subjective perception of the body in older school age. Furthermore, the influence of sex and regular exercise on the relationship to one's body is also observed. Foundation: The understanding of one's body schema is an important factor of overall wellness and is vital in correctly performing physical activities, or, when distorted, for the timely discernment of possible issues. This makes the insight into adolescent's understanding of body schema important not only with regards to injury or health issue prevention, but also with regards to the massive importance of physical activity in maintaining a person's physical and mental wellbeing. Methods: This paper is a quantitative survey method. A set of 40 respondents, 20 male and 20 female (ages 13-17) were given CMAS, BAT, personal questionnaires and a BSE measurement. The BSE method was used to establish a body schema with regards to physical activity (PA) and sex. The BAT questionnaire was used to establish a body image for each subject and whether there is any connection between body schema, PA, sex and body image. Results: The results show no statistically...
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The information depth of backscattered electron imaging
Piňos, Jakub ; Mikmeková, Šárka ; Frank, Luděk
Of the conventional imaging signals in the scanning electron microscope (SEM), the secondary electrons generally reflect surface properties of the sample, while the backscattered electrons (BSE) are capable of providing information about complex properties of the target down to a certain subsurface depth. Contrast mechanisms are combined according to the energy of incident electrons and energy and angular acceptance of BSE detection. In all cases, a question arises concerning the information depth of this mode. No applicable answer provides a definition declaring this depth as that from which we still obtain useful information about the object. We can employ software simulating the electron scattering in solids,\nwhile experimental approaches are also possible. Moreover, two analytic formulas can be found in the literature.
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SMV-2012-16: Scintillation detector of backscattered electrons lor SEM
Neděla, Vilém
The unique backscattered electron detector comprising a motor guided retractable mechanism controlled with microprocessor, a special light guide (from a material whose spectral transmittance satisfies used scintillation single crystal) and a scintillation single crystal with indium tin oxide layers (to removing of surface charge created during detection in electron microscope) was produced according to specific requirements of a customer.
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The Study of Ice Impurities Using the Environmental Scanning Electron Microscopy at Higher Pressures and Temperatures
Neděla, Vilém ; Runštuk, Jiří ; Klán, P. ; Heger, D.
Natural ice and snow accumulate and concentrate significant amounts of impurities that can be stored or chemically transformed, and eventually released to the environment. The location of impurities and their interactions with the water molecules of ice have not yet been sufficiently clarified. The aim of this work is to observe an uranyl-salt brine layer on the ice surface using a back scattered electron detection and the ice surface morphology using a secondary electron detection under equilibrium conditions in a specimen chamber of environmental scanning electron microscope (ESEM). Our specially modified ESEM AQUASEM II equipped with the YAG:Ce3+ backscattered electron detector, an ionization detector of secondary electrons, a special hydration system and a Peltier cooled stage was used. The pressures between 400-700 Pa, 50% water-vapor saturation, and the temperatures above 250 K were utilized in our experiments. At these conditions, the phenomena of etching and subsequent stripping of impurities are largely suppressed.
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