National Repository of Grey Literature
Not a member yet
574846 research outputs found
Sort by
Manufacturing of Aquaria Pavlica Brno
No full textThe subject of this bachelor's thesis is the design of an industrial hall for aquarium production in the Brno-Černovice district. The mass of the building was divided into three volumes. The main entrance area, combined with the carpentry workshop, is offset in the direction of the access road. The production and exhibition spaces of the aquariums follow the rectangular shape of the plot. The administrative part of the building has two floors, while the adjacent production areas are single-story and match the height of the two administrative floors. The exhibition spaces extend from the northern side of the building, where the clear height is increased to emphasize the representative nature of the space. The goal was to create the effect of protruding concrete slabs and an exposed load-bearing structure. This results in two interwoven masses – one in the form of massive concrete slabs and the other as a subtle, recessed glass cube, resembling an aquarium
Analysis of the Efficiency of Lump-Sum Expenses and Tax Evidence for a Natural Person
No full textThe bachelor’s thesis focuses on the analysis of expense application by a specific self- employed individual, with the analyzed years being 2023 and 2024. It specifies in which situations it is or is not appropriate to choose the application of lump-sum expenses or actual expenses. It includes a definition of the key factors that influence the selection of the optimal method of expense application for the year 2024
Comparison of Malware Detection Methods in Encrypted TLS Traffic.
No full textThis work focuses on the validation and comparison of selected methods for malware detection in TLS encrypted communication. The selected detection methods use a combination of features extracted from the TLS protocol with network flow statistics and are based on logistic regression models with L1 penalty, Random Forest and SVM. The paper presents a comparison of the methods on a training set using 10-fold cross-validation and then on a test set. ACC, TPR, FAR and FDR metrics were used to evaluate the results. The methods were able to improve, with Random Forest and Logistic Regression with L1 penalization achieving the best results with 97.96\% and 97.94\% detection accuracy, respectively. The methods were compared in terms of computational complexity and speed of processing network flows
Automatic Drone Landing on the Ground Target
No full textCílem této práce bylo navrhnout a implementovat autonomní systém přesného přistání dronu s využitím počítačového vidění a referenčních značek. Systém využívá vlastní vnořenou ArUco značku jako cíl přistání, který je detekován a lokalizován pomocí ArUco detektoru. Relativní poloha dronu vůči značce je určena řešením problému Perspective-n-Point. Na základě této polohy sada PID regulátorů vypočítává rychlost kterou se má dron pohybovat, a spolu s přistávací strategií založenou na hraničních podmínkách, umožňuje přesné přistání na pozemní cíl. Řešení bylo testováno v simulátoru Gazebo a dosáhlo průměrné přesnosti přistání kolem 2 cm v klidných podmínkách a kolem 7 cm při simulovaném větru o rychlosti až 14 m/s. Výsledky potvrzují, že přístup je vhodný pro přesné přistání s využitím pouze palubních senzorů a jedné kamery, což z něj činí vhodné řešení pro nízkonákladové systémy
Study of ionic processes in organic electronic ion pumps
No full textAn organic electronic ion pump (OEIP) is a bioelectronic iontronic device used primarily for controlled drug delivery. The aim of this work was to develop a methodology for the combined measurement of ion transport in OEIP and to optimize the apparatus used for this purpose. Ion transport in OEIPs is currently detected either indirectly by measuring the properties of electrolytes outside the well of the OEIP, which causes measurement inaccuracies, or by measuring the electric current passing through the OEIP, which is also inaccurate. The combined detection method addressed in this work allows the study of ion transport directly in the OEIP well without the need to interrupt the measurement. The combined ion transport detection method consisted of continuous measurements of pH, absorbance and electric current. The study of the factors influencing the individual measurements allowed the optimization of the used apparatus. The use of these three independent methods allowed verification of the values obtained for the concentrations of H+ ions transported across the OEIP membrane and a broader discussion of the processes involved. The results of ion transport detection using the combined method verified the concept of the possibility of determining the concentration of ions transported across the OEIP membrane simultaneously using the three methods. Although this method is still limited by, for example, temperature or inhomogeneity of the measured solution, it has the potential to significantly refine the data on transported ions in OEIP in the future, which would have a major impact on controlled drug delivery research. The method could also be used to study the properties of ion-exchange membranes used not only in OEIP but also in other iontronic and bioelectronic devices
High Availability of Infrastructure
No full textThis bachelor thesis addresses the issue of high availability. Where it can be used and how it should be implemented. The bachelor thesis describes methods for ensuring high availability, such as SLA, redundancy, scalability, clustering, load balancing etc. Why they are used, the reason behind their use and their applications. Furthermore, it describes how to minimaze downtime in systems operating with high availability. Metrics such as overall availability, MTBF, MTTF and MTTR are explained, including options for their minimization. Finally, well-know representatives of open-source tools for ensuring high availability are characterized, such as Docker Swarm, Kubernetes, Keepalived, HAProxy and Zabbix. In practical part, 2 virtual machines were virtualized with QEMU-KVM both of them were configured via the autoinstall.sh script. Five scenarios were created and simulated, and their impact on SLA was measured and calculated for streaming services
Detached House in Tísek
No full textThis Bachelor’s project designs a nearly-zero energy house with a green wall. The house is situated in the village Tísek. It is a detached house with a separate garage. The capacity is for four people. The layout is 3 bedrooms and two studies. The central point is on the first floor. There is a dining area, a kitchen and a living room together with an entrance to the terrace with the view of the Beskydy Mountains. Two bedrooms, a study and a master bedroom with a walk-in closet are situated on the second floor. The house is made of an autoclaved aerated concrete (AAC) system. The external walls are insulated with mineral wool. The gable roof is designed with AAC beams and blocks, as well as the floor slab. The shallow foundations are made of C20/25 concrete. Mechanical ventilation with heat recovery is situated in the corner of the utility room, to make the ducts as short as possible. All technical equipment and control panels are located in the utility room as well. Heat is provided by air-to-water heat pump, the house uses floor heating, with electric towel radiators in the bathrooms. The outdoor heat pump is situated next to the north facade. The stormwater is collected in the tank and used for flushing and watering the green wall and the garden. The green wall is located in the living area for cleaning the air. It is the highlight of this house. The house is classified in category A of Energy performance certificate
Remote control of e-ink display
No full textThe aim of this work is the design and implementation of an appropriate interface for displaying personalized content on a screen. The system is implemented using a server running on a local network, which communicates with the display where the corresponding code is deployed. It also utilizes various mini-applications that can be shown on the screen. This system has been successfully tested in different networks, and the user interface has been evaluated with the involvement of specific users. The main benefits of the project are its user-friendliness, enhanced security through the use of a local network, and easy extensibility thanks to its open-source code
Domovní zabezpečovací systém s platformou ESP32
No full textThis thesis focuses on the design and implementation of a home security system based on the ESP32 platform. The main objective was to create an affordable, modular, and reliable solution that combines motion detection with a camera system. The proposed solution utilizes a three-tier architecture consisting of a Raspberry Pi as the central control unit, sensory modules with ESP32 microcontrollers equipped with PIR and mmWave sensors, and a mobile application providing a user interface for remote management. The WebSocket protocol was implemented to ensure real-time communication, enabling efficient transfer of configuration data, notifications, and image data. Experimental verification demonstrated high system reliability in motion detection under various conditions, with the mmWave sensor showing significantly better results than the traditional PIR detector, especially in detection through obstacles and at greater distances. User testing confirmed the intuitiveness of the mobile application. The proposed solution represents a functional alternative to commercial security systems with potential for integration into the smart home concept
Impact of Speaker Characteristics on the Performance of Deepfake Speech Detectors
No full textTato bakalářská práce se zaměřuje na problematiku hlasových deepfakes, generovaných zvukových nahrávek, které znějí, jako by je namluvili skuteční lidé. Cílem této práce je zjistit, zda demografické údaje mluvčího ovlivňují výkonnost systémů pro detekci deepfake řeči. V úvodu práce je představena technologie deepfake a taktéž klasifikace hlavních typů syntézy řeči. Práce se dále zabývá přehledem existujících datových sad pro skutečnou a falešnou řeč. Je poukázáno na jejich slabiny a je navržena nová datová sada obsahující anotace mluvčích, jako je pohlaví, jazyk, věk a úroveň vzdělání. Navržená datová sada obsahuje 237 250 nahrávek s celkovou délkou trvání více než 500 hodin, sestavených z řeči 50 mluvčích v pěti jazycích. Dataset je použit k vyhodnocení několika systémů pro detekci řeči. Získané výsledky jsou podrobně analyzovány – je uvedena výkonnost detektorů pro každou z charakteristik mluvčího a je statisticky vyhodnoceno, zda existuje nějaké zkreslení mezi demografickými podskupinami. Výsledky ukazují, že moderní detektory nejsou nezaujaté a že je třeba věnovat zvláštní pozornost trénování a nasazení spravedlivých a nediskriminačních detektorů deepfake řeči