National Repository of Grey Literature
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Basic fuselage design of an ultralight tandem aircraft
No full textThis thesis focuses on the preliminary design of the fuselage of a tandem-seat ultralight aircraft. The introductory section includes the calculation and plotting of flight envelopes. A mass balance analysis is then performed and concluded with a center-of-gravity diagram. To determine the loading conditions, six mass configurations were selected and combined with 19 loading scenarios. From all the combinations of loads acting on the aircraft, 10 critical cases were identified and subsequently used for the structural strength verification of the proposed design. A system model of the aircraft was created in SOLIDWORKS for the purpose of strength analysis. A semi-monocoque structure was chosen for the tail section, and a beam structure for the central section of the aircraft. The strength analysis considered the effects of bending moments, shear forces, and torsional moments. All calculation procedures are described in the respective chapters, and all results not included in the main text are provided in the appendices
Analysis of bicycle drive systems
No full textThis bachelor's thesis focuses on the analysis of bicycle drivetrain systems, emphasizing their current state, advantages and disadvantages of different solutions, and possibilities for future development. The aim of the thesis is to systematically map available drivetrain systems, assess their efficiency, and identify key development trends, including the application of modern technologies and new materials. To achieve these objectives, an extensive review of available literature, technological innovations, and patent solutions was conducted. Individual drivetrain systems were analyzed based on criteria such as energy transfer efficiency, weight, gear ratio variability, maintenance, and production costs. The result is a comprehensive overview of current technological solutions, including their strengths and weaknesses. The analysis showed that, despite technological advancements, chain-driven systems retain their dominant position due to their simplicity, efficiency, and economic advantages. Alternative drivetrains, such as belt or shaft-driven systems, offer certain benefits, but their widespread adoption is hindered by technical and economic barriers. The thesis also discusses the potential for broader application of modern manufacturing technologies, such as 3D printing and advanced composite materials, in the bicycle industry. The findings contribute to a better understanding of the evolution of bicycle drivetrain systems and can serve as a foundation for further research in optimizing energy transmission and integrating innovative technologies. The results of this thesis may be useful not only to the scientific community but also to manufacturers and designers seeking new ways to improve bicycle drivetrain systems
Design of an Energy Efficient Family House in Kouty
No full textThe aim of this Bachelor's thesis is to design a two-storey nearly-zero energy detached house in Kouty village. It includes architectural and building designs, design of building services, building energy certificate, building physics assessment and fire safety designs. The residential rooms face south. A utility room, a bedroom, a study and a private gym face north. The bathrooms face east. A unheated garage and a storeroom and a terrace are next to the house. The foundations are designed of plain concrete strips. The vertical load-bearing structures are designed of ceramic blocks with external thermal insulation composite system. The horizontal load-bearing structures are made of reinforced concrete. The house has a gabled roof, and the garage has a flat roof. The windows and doors in the building envelope are plastic with insulating glazing. The main device will be an air-to-water heat pump that supplies heat for underfloor heating and hot water. Heat for the domestic hot water is also supplied by solar thermal panels and photovoltaic panels installed on the gable roof. The wastewater will be discharged into the public sewer. Mechanical ventilation with heat recovery will be placed on the wall in the utility room. Rainwater is collected and drained from the roof into a storage tank and used for watering. The project documentation also includes an energy performance certificate classified as A – very efficient
Effect of the Using Reclaimed Asphalt Pavement on the Properties of Microsurfacing
No full textThis bachelor thesis focuses on the effect of usage of Reclaimed Asphalt Pavement on the properties of microsurfacing. The theoretical part explores currently used maintenance and preservation technologies. In addition to that, a brief research is conducted on the use of Reclaimed Asphalt Pavement in microsurfacing in the available literature. The practical part focuses on determination of the properties of the initial materials. Another point presented is the mix design of microsurfacing and futher investigation of the mix time for each design and for partial or complete substitution of virgin aggregate for Reclaimed Asphalt Pavement. Finally, the findings from the practical part are summarized, suggesting that the usage of Reclaimed Asphalt Pavement in microsurfacing is possible
Mobile App for Extremely Simple Management of the Presence of Team Members
No full textThe goal of the bachelor's thesis was to design and implement a mobile application that makes it easy to create events, invite participants and then track the status of their responses. The output of the solution is a native Android application with an emphasis on an intuitive user interface and an intuitive and easy-to-use interface for viewing the status of participation. The technical report details and presents the various technologies and tools used in the development. The result is a fully functional mobile application which I plan to develop further
Analysis of the combustion process for M100 fuel
No full textMethanol is one of potential alternative fuels. Even through its use in combustion engines was long known, its main use was in racing cars. In recent time there has been an effort to introduce methanol into standard transport. To compare its properties with gasoline, a combustion analysis was conducted on a testing engine, followed by calculating and comparing select parameters. Testing has shown that methanol burns faster and earlier with other parameters comparable to gasoline. This work will serve as a basis for further research into methanol
Visualization of Data from Race Specials Using Dashboards
No full textMotoršport vyžaduje, aby vozidlá dosahovali maximálny výkon aj v extrémnych podmienkach. K tomu je potrebné, aby mechanici mohli počas celých pretekov monitorovať aktuálny stav vozidla a robiť rýchle rozhodnutia. Výstupom tejto práce je funkčný softvérový prototyp digitálneho dashboardu navrhnutý špeciálne pre palubného mechanika v rally vozidle. Dashboard bol implementovaný ako webová aplikácia s frontendom v Reacte a backendom v Node.js ktorý je zodpovedný za beh simulácie. Súčasťou je vlastná knižnica vizualizačných komponentov ktorá môže byť využitá pri vývoji ďalších podobných dashboardov. Riešenie bolo testované s odborníkmi z praxe. Práca tak prináša nielen overený návrh a implementáciu pre konkrétne použitie v motoršporte, ale aj univerzálne princípy využiteľné v iných oblastiach, kde je potrebná rýchla a spoľahlivá vizualizácia senzorových údajov
Solution for secure connection of external employees in Racom's network environment
No full textThis thesis explores the design and implementation of a secure access solution for external workers connecting to the corporate network of Racom. The study begins with a detailed analysis of the current network environment, focusing on VLAN segmentation and VPN connection options. The aim of this work is to propose a secure environment for external workers, enabling them to access selected corporate resources without requiring dedicated Ethernet connections. The implementation utilizes the 802.1X protocol for user authentication and authorization, which enables dynamic assignment to appropriate VLANs based on Active Directory information. This approach provides a high level of security with the flexibility to access from any port in the network. For monitoring external worker activities, a comprehensive system was implemented based on collecting and analyzing logs from the Sophos XG firewall and SNMP monitoring of the network infrastructure. The monitoring solution uses a combination of rsyslog and Zabbix tools for centralized collection, filtering, and analysis of security events. The entire system was tested in a controlled environment, which demonstrated its effectiveness in detecting security incidents and automatically responding to potential threats. The implemented monitoring enables real-time tracking of external worker activities through a specialized dashboard. The results show that the combination of the 802.1X protocol and a comprehensive monitoring system significantly enhances the security of network infrastructure while maintaining flexibility for external worker connections. The proposed solution provides an effective tool for managing access to corporate resources and proactive detection of security threats
Verification of properties of thermocouples for temperature characterization of batteries
No full textThe thesis deals with the selection of a suitable type of thermocouple for temperature measurement in an autoclave, which is used for testing battery cells. The aim of the thesis is to analyse the design of thermocouples and their types, especially in terms of the effect on the accuracy, time constant and sensitivity of the measurement. Furthermore, the thesis focuses on the factors affecting the measurement chain of thermocouples, in particular the influence of the length, thickness and material of the thermocouples on their electrical properties and signal transmission. In the experimental part, the thermocouples are repeatedly fabricated with emphasis on consistency of procedure, and their properties are verified and analyzed. In the end is recommended the most suitable thermocouple type and wiring for the application
Community energy system possibilities in Sloup area
No full textThis thesis focuses on analyzing the impact of photovoltaic sources and other renewable technologies on the current and future energy landscape. It examines investment costs, return on investment, operational aspects, and regulatory influences related to the implementation of these systems. The work also evaluates the environmental and social benefits of decentralized energy production through photovoltaics, wind power, hydrogen, and cogeneration. Particular attention is paid to energy storage issues and the optimization of energy flows within community systems. The outcome is a proposed model of a community-based decentralized energy system for the municipality of Sloup, combining PV, wind turbine, and hydrogen cogeneration to ensure self-sufficiency and sustainability