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Thermal Mass Flowmeter
Mlčoch, Albert ; Kunz, Jan (referee) ; Beneš, Petr (advisor)
The thesis deals with the design of a mathematical model and practical implementation of a flowmeter based on the thermal principle. The range of the proposed flowmeter is from units of kilograms per hour to lower hundreds of kilograms per hour. The design of the flowmeter is non-invasive to the flow channel, the heating element is located outside the pipe. In this paper, the flowmeter parameters are identified and a temperature regulator is proposed. Measurements are made on a test bench. The results of the measurements are discussed. Modifications to the existing hardware are suggested.
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Dynamical symmetry breaking in models with strong Yukawa interactions
Beneš, Petr ; Hošek, Jiří (advisor) ; Hořejší, Jiří (referee) ; Olejník, Štefan (referee)
Title: Dynamical symmetry breaking in models with strong Yukawa in- teractions Author: Petr Beneš Department: Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University Supervisor: Ing. Jiří Hošek, DrSc., Department of Theoretical Physics, Nu- clear Physics Institute, Academy of Sciences of the Czech Repub- lic Abstract: The primary aim of the thesis is to explore the possibility of spon- taneous symmetry breaking by strong Yukawa dynamics. Tech- nically, the symmetry is assumed to be broken by formation of symmetry-breaking parts of both the scalar and the fermion prop- agators, rather than by the scalar vacuum expectation values. The idea is first introduced on an example of a toy model with the underlying symmetry being an Abelian one and later applied to a realistic model of electroweak interaction. In addition, the thesis also deals with some more general, model-independent is- sues, applicable not only to the discussed model of strong Yukawa dynamics, but to a wider class of models with dynamical mass generation. First of these issues is the problem of fermion flavor mixing in the presence of fermion self-energies with a general mo- mentum dependence. It is in particular shown how to define the CKM matrix in such models and argued that it can come out in principle...
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Viniculture in Havraníky
Krátká, Kristýna ; Sedlák, Radek (referee) ; Beneš, Petr (advisor)
The diploma thesis aims to elaborate on the project documentation of the buildings SO 01 - hotel and SO 02 - a winery within the complex of Viniculture Havraníky, a former agricultural area. SO 01 is a two-storey building with a partial basement. There is accommodation for 50 guests, a restaurant and a wine bar. SO 02 is a single-storey building with a basement. It consists of all operations for the production of a medium-sized winery. The structural system of both buildings is designed as a cast-in-place concrete frame. Fasade is insulated with an external thermal insulation system (ETICS). The roofing of the SO 01 building is solved by a flat green roof, whereas the roofing of the SO 02 building s solved by a saddle roof with girders.
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Fire Resistance Testing of Green Flat Roofs
Hobzová, Klára ; Pilinszki, Martin ; Beneš, Petr
The requirements for the roof covering with a vegetation layer, from the point of view of fire safety, are not currently directly defined in the Czech Republic. According to ČSN P CEN / TS 1187: 2012, four test methods are used for the classification of roofs / roof coverings exposed to external fire. The basis for determining the fire resistance of a green roof are classification protocols prepared according to the standard (roof coverings classified in the Broof (t3) class do not spread fire and prevent ignition of flammable parts of the structure). The article deals with testing the fire resistance of a green intensive roof according to our own methodology, which is based on the Broof (t3) test. The course of temperatures in individual layers of the roof cladding was monitored. The maximum temperature under the grass was determined from the temperature sensors, followed by the maximum temperature rise of 150 mm and 300 mm below the surface. Finally, the extent of flame spread across the surface was measured. The aim was to determine the effect of external fire on the supporting structure of the roof cladding, then to classify the structure into the appropriate classification according to ČSN EN 13501-5: 2017.
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Methods of Accurate Measurement of Low Impedances
Mašláň, Stanislav ; Sedláček,, Radek (referee) ; Bilík, Petr (referee) ; Beneš, Petr (advisor)
Overall topic of presented thesis is development of methods of measurement of low impedances below 10 Ohm in a frequency range up to 1 MHz. The thesis comprises of three main parts. First part of thesis describes design of unique and simple calculable standards of resistance that are used for calibration of the bridge and as the reference standards for the calibrations. Next part of theses is focused on design of digital sampling bridge in various topologies suitable for measurement of various types of impedance standards up to frequency of 1 MHz. The thesis describes the HW components, data processing and corrections scheme allowing the designed bridge to reach expanded uncertainties (k=2) below 0.005% and 250 µrad at 1 MHz. One of the key points of the proposed corrections scheme is unique automatic linearity calibration method requiring minimal operator's effort. The theses also describes integration of Spice model of the bridge the bridge SW that allowed validation of functionality of the bridge and also analysis of uncertainty contributions related to interferences between the bridge components. The last part of the thesis shows selection of measurements of known impedances and international comparisons that proofs performance of the bridge.
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The block of flats
Prchalová, Nicol ; Sedlák, Radek (referee) ; Beneš, Petr (advisor)
The subject of the bachelor's thesis is to proces a design documentation for construction of apartment building that is situated in city part Brno-Chrlice in Břestislavova street on the plot number 505/3. Apartment building is non-basement and contains 11 hoising unit. Wall construction system is built from clay block Porotherm. Ceilings are represented by cast-in-place reinforced floor slab. The buildig is covered by hipped roof. There are 10 outdoor parking spaces near the building.
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The block of flats
Müller, Otto ; Sedlák, Radek (referee) ; Beneš, Petr (advisor)
ABSTRACT The subject of the Bachelor´s thesis is processing of project documentation for implementation of a new apartment building in Ostrava, which is set in the locality of housing estate built in the previous regime. The apartment building has four floors, basement and longitudinal support system. Object is placed perpendicular to the slope. In the apartment house are eight flats, on already mentioned for floors and in the basement are technical rooms and cellars for every flat. Shape and appearance of object are solved in a simple way to fit into locality of apartment buildings. Construction will be implemented from sharped brick blocks in combination with ceramic-concrete ceilings on concrete foundations. The new building will be insulated by thermal insulation system ETICS from mineral wool. Facade color will be in shades of grey. Roof will be flat and single skin.
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Fiber-optic liquid level sensor
Ondra, Dominik ; Beneš, Petr (referee) ; Skalský, Michal (advisor)
This text summarizes scientific principles that are used in fiber optics field, and could be used to design liquid level sensor. Different types of optic fibers and advanced optic structures are analyzed for liquid level sensor usage. Mechanisms of already existing types of optic fiber liquid level sensors and other mechanism liquid level sensors are characterized. Three sensor designs are proposed. One working with different levels of auttenaution when bending the fiber. The other meassuring different refraction indexs of the environment and the last one based on phase delay of light. Viabillity of these principle has been tested. Text also describes optic fiber splicer Fujikura FSM 100P+ and optic fiber sturctures that it is able to produce. Sensor based on refraction index of environment has been calibrated.
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pH measurement
Žatečka, František ; Klusáček, Stanislav (referee) ; Beneš, Petr (advisor)
This bachelor thesis deals with principles of pH measurement with focus on measurements in concrete. The very beginning of the work describes basic principles of measurement. On those, basis a research of methods for measurements in concrete was done with priority on non-destructive methods. According to the theory a survey of Czech market was conducted. The last part of the work is description of experiments that are based on theory.
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