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Characterization of Submicron Aerosol in Prague by Combined ME-2 Factor Analysis of AMS Data
Makeš, Otakar ; Vodička, Petr ; Schwarz, Jaroslav ; Ždímal, Vladimír
Real-time measurement of submicron aerosol particles was performed at Prague – Suchdol site (Czech Republic) during six weeks long summer and winter campaigns in 2012-2013. Highly time and size resolved data were obtained from measurements carried out by a Compact Time-of-Flight Aerosol Mass Spectrometer (C-ToF-AMS, Aerodyne). The retrieved data were analyzed with using the So-Fi graphical user interface which is developed by Paul Scherrer Institute (Canonaco, 2013) and is running under IGOR software (WaveMetrics). The preliminary results are presented in this abstract.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22015102910271 - PDF
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Fishponds and water quality
Duras, J. ; Potužák, Jan ; Marcel, M.
Most of the fishponds in the Czech Republic is highly eutrophic to hypertrophic. This situation is related to the run-off in the catchments and by the fis-farming management (especially fertilisation). Long-term monitoring of fishpond water quality is complicated by large spatiotemporal variability of the parameters measured.
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Modelování hydrodynamiky a kvality vody v dimiktické nádrži – nádrž Jordán, Česká republika
Hejzlar, Josef ; Jarošík, Jiří ; Borovec, Jakub ; Růžička, Martin
The two-dimensional, dynamic model CE-QUAL-W2 was used to model water quality of a small, highly eutrophic reservoir with intensive nutrient cycling between the water column and bottom sediment. The model was calibrated and evaluated for a 4-year, hydrologically variable period and used in a scenario simulation study to analyse effects of the changing external and internal phosphorus loading and depth of outflow to trophic conditions and water quality. The reservoir hydrodynamics were simulated with good precision in all parts of the seasonal cycle and during the whole period. Water quality and nutrient cycling could be calibrated and simulated with satisfactory results for individual years, however, an extrapolation of model to conditions with different nutrient loading was problematic. It spite of this partial limitation, the model was found appropriate for water quality evaluation and prediction in Jordan Reservoir.
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Possibilities and Difficulties of Rising Institutions and Private Activities in Pre-school Education.
Sosnovcová, Lenka ; Kropáčková, Jana (advisor) ; Opravilová, Eva (referee)
Our legislation admits running private activities, but sometimes these are not sufficiently transparent according to our law. The author has researched the advantages and disadvantages of private pre-school institutions in this Diploma Thesis. The Diploma Thesis has aimed at the position of the family in relation to a child, the matter of child's value in current society in comparison to the past and has analysed the main legislative documents that are necessary for setting up private pre-school institutions. The author has focused on the fact how far private pre-school institutions fulfil children's needs and general vision of this education stage that are established in education framework for pre-school children. In the practical part of this Diploma Thesis, which comprises ten private pre-school institutions, the author has searched what owners, teachers and parents see as possibilities and difficulties in this kind of pre-school education. Another fact on which the author has focused is whether teachers are highly qualified for this job or not. The author's aim is to research whether and how their opinions are different regarding to the possibilities of private pre-school education and whether they are also aware of the danger which might threathen children.
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Predictors of career orientation from the perspective of 50 year longitudinal study
Millová, Katarína ; Blatný, Marek ; Jelínek, Martin ; Šolcová, Iva
The study deals with the psychological and environmental predictors and correlates of career orientation in middle adulthood. The sample consisted of 74 participants (32 men, 42 women; 41-44 years) who participate in the longitudinal study running from 1961. Atmosphere in the family of origin, intelligence and school success at 12 years predict only educational level in adulthood, but not career orientation indexed by stability of career line and long-term unemployment. Concurrently, educational level in adulthood is slightly related to career orientation. The stability of career line, is influenced also by personality characteristics measured in middle adolescence, especially by extraversion. Highly extraverted adolescents had variable (but not unstable) career line in their middle adulthood. Career orientation was associated with risk behavior and with sense of coherence: risk behavior was connected to long-term unemployment and sense of coherence to stability of career line.
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Smoking at children and young people - analysis in 8 years age spread
SUCHÁ, Kateřina
Abstract The topic of my bachelor work is Smoking of children and youth {--} analysis in an eight-year age range. Smoking of children and youth is a highly discussed problem at present; therefore I have chosen that phenomenon for my bachelor work. The first part describes the present general status of the topic of smoking. I used literary sources stated in references for that topic. I focus on the history of smoking, on the composition of tobacco smoke; I describe individual types of tobacco products, the manifestations of tobacco intoxication, the essence of dependence, types of tobacco dependence and the withdrawal symptoms. I deal with the topic of passive smoking, diseases related with smoking and smoking during pregnancy. I also focus on risk and protective factors of children and youth in relation to habit-forming substances. Another circuit of the current status is treatment of tobacco dependence and its types. In conclusion I described the topic of tobacco product advertising. The research performed used quantitative method from sociological point of view. Two questionnaires were used for data collection. One questionnaire was used to collect data at the elementary school of Mirotice and it was intended for pupils of third through sixth classes (see Annex No. 1). The second questionnaire was intended to students of the 1st through 4th classes of the Secondary agricultural school of Písek (see Annex No. 2). The first aim was to ascertain whether more girls or boys smoke at present. After evaluating the results, I came to the conclusion that more girls than boys smoke. The second aim was to compare the frequency of smoking in 8-9-year old children with 16-17-year old young persons. I could not compare that aim. No 8-9-year old child stated to smoke. I have stated two hypotheses: 1. Children and young people are not informed about the health risks originating at smoking. That hypothesis was not confirmed. According to the answers, children are sufficiently informed about the health risks of smoking. 2. Children and young people are the most strongly motivated to smoke by friends and the media. The research showed that children and youth are the most frequently motivated by friends; negative influence of media was not confirmed. From the total number of 139 respondents, only 40 smoke, which is not so highly alarming situation. One of the means to eliminate even more the status of smoking of children and youth could be particularly an increase of preventive programs at schools, because almost a half of the respondents answered that no such program was running at their school.
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The application of the process of high-pressure hydrolysis with nitric acid at the production of biogas from hay
VANĚK, Zbyněk
This thesis deals with the technology of the high pressure hydrolysis with nitric acid (HNO3) in biogass production from the hay. The theoretical part is focused on the basic information about the acid hydrolisis. Much attention is ingaged in the lignocellulosic materials and methods of their treatment.The hay was crushed, pelleted and subsequently subjected the acid hydrolysis in the high-pressure hydrolyzer (UV CZ 21314) at pressures (0,475 MPa, 0,934 MPa, 1,611 MPa). As the hydrolysis reagent was used highly concentrated (65%) nitric acid (HNO3). The pressure was achieved in the hydrolyzer by the steam in temparature of 190°C, the residence time of the phytomass in the machine was 500s. Based on the mapping process with wide CO2 production were selected the interesting areas, which were subsequently carried out detailed mapping process using batch simulations at CH4 production. After the mathematical interpolation of the maxima the values were used in the economic analysis, that fully respects the technological possibilities and legislative constraints.
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Neural Network Letter Recognition
Kluknavský, František ; Hradiš, Michal (referee) ; Šilhavá, Jana (advisor)
This work uses handwritten character recognition as a model problem for using multilayer perceptron, error backpropagation learning algorithm and finding their optimal parameters, hidden layer size, learning rate and length, ability to handle damaged data. Results were acquired by repeated simulation and testing the neural network using 52,152 English lowercase letters. Best results, smallest network and shortest learning time was at 60 neurons in the hidden layer and learning rate of 0.01. Bigger networks achieved the same ability to recognize unknown patterns and higher robustness at highly damaged data processing.
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Simple timing of MATLAB GUIs used in MS-Windows for data acquisition
Nesládek, P. ; Steinhart, Miloš
The contribution proposes an elegant possibility of timing in the basic MATLAB. The timer is a small program running in the Windows environment. Its function is to periodically click a pushbutton in a GUI by simulating an action of a mouse through sending on appropriate message into the Windows message queue. The timer can be used in cases when sampling or other action is to be done periodically in time points. These cases are e.g. data acquisition or periodical monitoring of some dangerous status of the controlled instruments.
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