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Surfing in the landlocked countries
Gross, Adam ; Bačáková, Radka (advisor) ; Hruša, Filip (referee)
Title Surfing in the landlocked countries Objectives The aim of this bachelor's thesis is to explore from the perspective of people who permanently live in a landlocked country, whether it is possible to sufficiently train and prepare for surfing in oceanic conditions. Methods This project is an empirical-theoretical work in which a quantitative research method in the form of questioning was used. Data was obtained through an online survey that contained mostly closed questions, along with a few semi-closed and open questions. The total number of questions was 24. The survey was distributed through various social media platforms aiming at people with previous or current surfing experience who live permanently in a landlocked country. Data collection took place using the Google Forms application. Results The results of the thesis show following: From the respondents' point of view, the conditions for learning, training and preparing surfers in a landlocked country are not comparable to the conditions of a country that has an ocean and offers the opportunity to ride real surfing waves. Conclusion In conclusion, the results of the survey have addressed the research questions. Based on the answers received from the respondents, it is possible to say that some individual parts (components) of surfing...
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Horizontální proudění vody v malých rybnících
ŠŤASTNÁ, Tereza
This bachelor thesis dealt with the flow in small ponds (specifically in pond Dehtář near the village Žabovřesky) with a focus on horizontal flow. Its aim was to perform field measurements of water movement of the surface (using devices developed by us, equipped with GPS logger) under various atmospheric conditions and from the results to determine the water flow velocity at the surface in real conditions. GPSMAP 78s, GPSMAP 60CSx and MOTOROLA phones with GPS Logger application inserted into balanced PVC pipes were used for measurements. Another objective was to create a simplified 3D model of the pond and simulate the flow in its deeper layers using Ansys software. Field measurements resulted in streamlines showing the direction of flow for the top layer of water. With wind speeds of 1-3 ms-1 in foggy and cloudy weather, the observed flow velocity was approximately 0.025 ms-1. At very low wind speeds of 0-1 ms-1 in foggy weather, the flow velocity was 0.0083 ms-1. Under variable conditions, when the surface was first slightly frozen but then melted and stronger winds from a different direction began to blow, the resulting flow velocity was first 0.025 ms-1 (at a wind speed of 0.7-1 ms-1) and later 0.0375 ms-1 (at a wind speed of 2-3 ms-1). The Ansys modelling resulted in simulations of flows in simplified ponds of two shapes (one with a sloping bottom, 0.5-4 m depth and rounded corners and the other with a constant depth of 2 m and a depression with a total depth of 4 m and rounded three corners) at different wind velocities (0.5; 1; 2; 4; 8 and 16 ms-1) and three or four wind directions. In general, the simulations showed that the flow velocity increased with wind speed, with the prevailing flow velocity being about 3% of the wind speed for all simulations. At the same time, flow velocity decreased with depth, and water was mixed to approximately 95% of the depth (up to 3.8 m). The simulations also showed the formation of eddies, here the water moved fastest where the eddies touched the edge of the pond, but in the centre of the eddies there were often areas of very low flow velocities and relatively long residence times (from seven hours to six days). The results of the field measurements and simulations in this thesis can contribute to the understanding of the processes (e.g. the effect of water mixing on oxygen, plankton and nutrient content at different areas) occurring in pond Dehtář. They may thus provide a basis for subsequent mapping of its circulation patterns, which may influence the origin and development of oxygen deficiencies and the concentration of natural food for fish and nutrients in certain parts of the pond. They can thus help to determine the suitability of areas, for example for fish feeding or sampling and thus have a positive impact on improving the management of this pond.
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Propagating star formation
Dinnbier, František ; Wünsch, Richard (advisor) ; Brož, Miroslav (referee) ; Naab, Thorsten (referee)
Massive stars are powerful energetic sources shaping their surrounding interstellar medium, which is often swept up into a cold dense shell. If the shell fragments and forms a new generation of massive stars, the stars may form new shells, and this sequence repeats recursively leading to propagating star formation. Using three dimensional hydrodynamic simulations, we investigate fragmentation of the shell in order to estimate masses of stars formed in the shell. We develop a new numerical method to calculate the gravitational potential, which enables us to approximate a part of the shell with a plane-parallel layer. Our main results are as follows. Firstly, we compare our numerical calculations to several analytical theories for shell fragmentation, constrain the parameter space of their validity, and discuss the origin of their limitations. Secondly, we report a new qualita- tively different mode of fragmentation - the coalescence driven collapse. While layers with low pressure confinement form monolithically collapsing fragments, layers with high pressure confinement firstly break into stable fragments, which subsequently coalesce. And thirdly, we study whether layers tend to self-organise and form regular patterns as was suggested in literature, and we find no evidence for this conjecture. Based on our...
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The Applicability of the JONSWAP Spectrum for Wave Events at Small Water Surfaces
Gřegoř, Adam
Task of the research was to determine whether the spectral density (i.e. spectrum) of wind wave events at Hulínská štěrkovna reservoir is the same as the JONSWAP spectrum, which was based at the wave events at partially developed sea. Data about the time course of the water surface elevation at reservoir were processed with use of the MATLAB and WAFO toolbox that was developed by the Lund University.
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Architectural study of the sacral object Brno - Líšeň
Hrubjaková, Petra ; Marek, Jiří (referee) ; Šindlar, Jiljí (advisor)
By entering the diploma thesis is to create an architectural study of the sacral object and the Salesian community center in Brno - Líšeň. The first mention of the creating church appeared in 1987 and because of this reason Salesians came to this city, they focus on working with children and youth, according to Don Bosca. Their method od education was reflected in the overall project concept. The building will be linked to the existing object of the Salesian Youth Center, but it will also serve for a wider circle of believers. The consecration of the church will be a third divine person - the Holy Spirit. The object will be on the Horníková ulica, on the parcels no. 5037/30,32. On the plot with parc. No.5037/32 is currently a building, that is the property of the Nadácia pre radosť, and it will by removed during construction. The proposal is based on urban analyzes performed and responds to the surrounding buildings. It also affects the conditions of the building plot and uses terrain sloping. The proposal consists of one object that includes a church with a capacity for 400 seat and 100-standing persons with chorus, sacristy, adoration chapel and technical and hygienic backgrounds. Furthermore, there is a educational/multifunction room, workshop and store of religious products, farther the parish part with the apartments, office for priests and underground garage. In addition to the building, there was created paved areas for pedestrian which responding to existing communications. Due to the removal of the parking lot in the northern part of the solved territory, the existing parking lot was extended on the south side and there was also created a new communication for cars, which connects the Northern Street Horníková with Western. In this communication, it is necessary to create a suitable road signage to prevent the supply of vehicles and it must not be used as an abbreviation in the traffic jam at the 2nd grade road communication.
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Brno New Train Station and its Public Spaces
Nytrová, Bohdana ; Hybská, Bohumila (referee) ; Sedláček, Michal (advisor)
For almost one hundred years, Brno has been deciding where the place of a new main train station should be. The works have almost started several times, but the various affairs have always postponed it. Two years ago, it was finally decided that „the River option“ would be constructed. So far, only the technological template has been written – e. g. railway bridge or platforms outline. The thesis focuses on the architectural design of the main building, the roof construction above the railways and spaces below the station bridge. In the design, the outlying urban structures are also dealt with. These include the locations of a bus station, taxi services and bike stands. Moreover, the design also mentions the station’s connection to the city networks. The main motive of the design is to put the main train station building into the centre of the city’s attractions – to make it visible. A boulevard’s view is oriented to the St. Peter’s cathedral – a famous Brno’s building. Just as the mentioned cathedral, the station is important for the city and deserves to be seen. A strong arched construction on four pillars serves as a roof over the railways and places where most visitors are expected to be most of the time. The arch also connects the public transport lines and the bus station. Part of a roof shaped like waves around the main hall connects the structure with the riverside nearby.
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Oscilační procesy v magnetických strukturách sluneční koróny
EFFENBERK, Kryštof
This diploma thesis is focused on waves and oscillations in the solar corona, which takes place in a large number of phenomena that occurs here. In recent years these waves have been observed in Earth observation same like as cosmic observation.The task of this thesis is to familiarize with the problems of waves and oscillations in solar corona and subsequent interpretation into numerical simulations that are performed by FLASH code. The aim of the work will be to modify numerical simulations and thus to achieve more realistic of the observed phenomena.
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History of audio carriers and transmission of sound
Šimarová, Lucie ; Krhutová, Milena (referee) ; Šedrlová, Magdalena (advisor)
Cílem této bakalářské práce je popsat vývoj zvukových nosičů. Tato bakalářská práce poskytuje náhled do historie a současnosti zvukových nosičů. Nejprve seznamuje čtenáře s teorií přenosu zvuku. Tato část je zaměřena na přenos vlnění a popisuje rozdíly mezi vlnami. Následně jsou probírány analogové a digitální způsoby záznamu zvuku. Hlavní část práce se věnuje uchovávání hudby. Nejprve se práce zabývá uchováním hudby před mechanickým záznamem, tato část zahrnuje notaci, tabulatury a automatofony. V další části je již popsán mechanický záznam zvuku, a to v analogové formě. Poslední kapitola je zaměřena na digitální záznam zvuku. V neposlední řadě práce obeznamuje čtenáře s kulturním a hudebním vlivem jednotlivých nosičů. Znalosti jsou nabyty z různých zdrojů, především z literatury.
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Propagating star formation
Dinnbier, František ; Wünsch, Richard (advisor) ; Brož, Miroslav (referee) ; Naab, Thorsten (referee)
Massive stars are powerful energetic sources shaping their surrounding interstellar medium, which is often swept up into a cold dense shell. If the shell fragments and forms a new generation of massive stars, the stars may form new shells, and this sequence repeats recursively leading to propagating star formation. Using three dimensional hydrodynamic simulations, we investigate fragmentation of the shell in order to estimate masses of stars formed in the shell. We develop a new numerical method to calculate the gravitational potential, which enables us to approximate a part of the shell with a plane-parallel layer. Our main results are as follows. Firstly, we compare our numerical calculations to several analytical theories for shell fragmentation, constrain the parameter space of their validity, and discuss the origin of their limitations. Secondly, we report a new qualita- tively different mode of fragmentation - the coalescence driven collapse. While layers with low pressure confinement form monolithically collapsing fragments, layers with high pressure confinement firstly break into stable fragments, which subsequently coalesce. And thirdly, we study whether layers tend to self-organise and form regular patterns as was suggested in literature, and we find no evidence for this conjecture. Based on our...
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