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School Meteorological Station
Pauk, Petr ; Knotek, Martin
Our work deals with meteorological measurements from theoretical as well as practical perspectives. Our goal was to construct an amateur meteorological station with an emphasis on recycling components from previous projects. We created a meteorological station, which is placed in the garden of our school and continuously measures meteorological data and sends them to a server, where it is accessible online, including simple visualization. Our work is also a guide to build similar meteorological stations not only for the participating teams of the project Dotkni se vesm´ıru and was submitted to the project organizer. All created software is publicly available on GitHub.
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Mapping the Proliferation of Strategic Partnerships
Rosendorf, Ondřej ; Parízek, Michal (advisor) ; Karlas, Jan (referee) ; Faude, Benjamin (referee)
Since the end of the Cold War, states have increasingly resorted to the establishment of informal alignments, with "strategic partnerships" at the forefront, whereas the number of formal military alliances has been stagnating. In spite of the rapid proliferation of these partnerships-next to other forms of informal cooperation-the extant International Relations literature has paid only limited attention to this phenomenon. In this dissertation, I introduce and analyze the first dataset of Bilateral Intergovernmental Strategic Partnerships (BISPs) established by G20 members between 1993 and 2020. Utilizing insights from international alignment and institutionalist literature, I aim to: (1) provide the first empirical account of the extent to which strategic partnerships have proliferated among the G20 and over time; (2) identify factors driving states to form strategic partnerships; and (3) determine whether these partnerships operate primarily as complements to the existing alliance structures, or exist in place of them as "low-cost" alternatives. Firstly, I found that G20 members alone established approximately 382 strategic partnerships by the end of 2020, surpassing previous estimations. Secondly, I found that the onset of strategic partnerships correlates with factors such as economic...
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Company Performance Measurement
Hél, Petr ; Keík, Josef (referee) ; Bartoš, Vojtěch (advisor)
The diploma thesis is by its nature focused on evaluation of company performance. Analyzed company SITA CZ, a.s. is one of the market leaders providing services regarding of treatment with non-hazardous and hazardous waste. This company is analyzed in two aspects within diploma thesis. Evaluation focuses on market position and performance within specific economic activities according to NACE rev.2 – 382, at first. Second evaluation is focused on competitive benchmarking that should pin-point particular weaknesses. The main goal of the diploma thesis is to propose solutions to improve company performance and market position.
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Manufacturing of castor holder
Moravčík, Juraj ; Dohnal, Ivo (referee) ; Podaný, Kamil (advisor)
The thesis solves the design of the technology of manufacturing the furniture wheel holder from a sheet thickness of 11 321 with a thickness of 2 mm. On the basis of the variant cutting and bending solution, a production solution was chosen in a process proggressive die. As a blank, a sheet metal strip is selected from a 64.1 mm roll. After the technology evaluation, the distances of the openings from the edge of the part and the bend were adjusted and the technological calculations determined the necessary total forces, work and other parameters. On the basis of the previous calculations, the S 160 E eccentric press of Šmeral was chosen as the most suitable machine. The designed tool works in six steps and includes nine cutting and one bending section together with two viewers and one spring retainer. Economic recovery has shown profitable production of the given series where the total profit is CZK 999 310,61 and the reversal point occurs after production 58 382 pieces.
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Machining of ceramic bodies using CAD-CAM
Kaplan, Lukáš ; Částková, Klára (referee) ; Kaštyl, Jaroslav (advisor)
The literature part of bachelor's thesis deals with ceramic materials based on Al2O3 and ZrO2, methods of sample preparation for consequent machining, different methods of machining, especially the technology of CNC machining in non-sintered and sintered state with their comparison. The thesis presents possible examples of the use of ceramic parts. The experimental part of the thesis deals with the machining of ceramic based on ZrO2 using different types of ceramic powders, methods of preparation and the choice of the sintered temperature in relation to its properties. The best results were achieved with SZ-3Y ceramic material sintered at 1550 °C for 2 hours, strength values were 1203 MPa, roughness of surface Ra was 126 nm a grain size was 382 nm.
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Study of heat transport throw bulk materials with electric conductive aditive
Vacula, Jan ; Menčík, Přemysl (referee) ; Zmeškal, Oldřich (advisor)
Bachelor thesis is focused on the study of heat transport in bulk materials made from PLA (polylactic acid) filaments by 3D printing. For subsequent applications it is important to know the electrical, dielectric and thermal parameters of materials with different dyes, pigments and electrically conductive additives. The aim of this work is mainly to study the thermal properties of the series and the influence of additives on these properties. The main focus is to study the thermal properties of the samples. In the theoretical part, different 3D printing methods are mentioned, the methods of measuring the thermal properties, and finally the properties of the lactic acid polymer are described. The experimental part is devoted to the description of the process of 3D printing samples for measurements and then the method of measuring the thermal properties of the printed samples is described. For samples with electrically conductive admixtures, the thermal conductivity was found to be in the range of (0,217–0,292) W/m/K and the specific heat capacity was found to be (382,2–1 007,2) J/kg/K. The electrically conductive materials (PLA with metallic admixtures) were found to have a very good thermal conductivity and a smaller specific heat capacity, while the materials with admixtures of dyes and pigments showed a smaller thermal conductivity and a larger specific heat capacity.
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Impact of selected emulsifiers and different emulsification methods on the growth of Staphylococcus aureus and Escherichia coli.
KOLDOVÁ, Kamila
The main topic of this bachelor's thesis is to determine the minimum inhibitory and bactericidal concentration of selected types of emulsifiers and plant extracts on the growth of Escherichia coli and Staphylococcus aureus bacteria. The thesis also examines the effect of selected emulsifiers and their methods of emulsification on emulsion stability. The theoretical part provides basic information about the bacteria used, their morphological characteristics, pathogenesis, and the diseases they cause. It also describes emulsifiers and their general characteristics, including emulsion stability. The final theoretical part of the thesis focuses on plant extracts, their properties, and their applications. The methodology section of this thesis illustrates the procedures for preparing emulsifiers and plant extracts, as well as determining the minimum inhibitory and bactericidal concentrations. These determinations were performed in a 96-well microtiter plate and measured spectrophotometrically. The method for preparing emulsion stability was conducted in glass test tubes, Eppendorf tubes, and centrifuge tubes. Based on these methodts, the stability of emulsion of Mueller-Hinton broth and sugar solution was determined. The results of minimum inhibitory and bactericidal concentration were processed into tables and evaluated. Emulsion stability was processed and evaluated using obtained photographs.
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Multiscale Modelling of Li-Ion Battery Volume Expansion
Mačák, M. ; Vyroubal, P.
Mechanical characteristics of Li-ion batteries play an important part in the design of electric devices or energy storage systems. Proper mechanical design can increase the safety and the longevity of devices. Apart from external forces, Li-ion batteries also experience internal volume changes due to inherent physical processes, especially volume changes caused by intercalation and deintercalation of lithium ions into electrode materials. Currently, these changes are mainly studied experimentally using complex methods, while numerical simulations of these processes are surprisingly rare. This works presents different numerical approaches for studying internal volume changes in Li-ion batteries. The results show that it is possible to study volume changes at different length scales, but it is necessary to apply a suitable simplification of the model to obtain macroscopic deformation.
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Plunging Brno into darkness: Measuring the contribution of public lighting to the total luminance of the night sky
Novák, F. ; Baxant, P.
The article deals with the description of measurements of night sky luminance in urban agglomeration with emphasis on the determination of changes in the values of these luminances when public and architectural lighting is temporarily turned off. The measurements took place in Brno, the second largest city in Czech Republic, with the population around 382 thousand. The presented paper is one of the perspectives on the impact of human activity on the surrounding environment and an example of a possible solution to quantify the impact of the introduction of technologies that directly or indirectly affect the environment not only for humans, but also for almost all forms of life.
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