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Automated coffee roaster with a sensor system
Halaš, Marek ; Münster, Petr (referee) ; Tomašov, Adrián (advisor)
The aim of this work is to design and build a portable coffee roaster with a sensory system. First, the work describes the types of roasters and a description of what happens to the coffee beans during roasting. The next part is focused on the actual design and construction. Designs are given here, and individual components and their connection to the development board are also described here. It also includes software that controls roasting and can perform the entire roasting process, from start, to finish.
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Accelerated sensor data analysis using an embedded system with a graphics processing unit
Maczkó, Adam ; Myška, Vojtěch (referee) ; Tomašov, Adrián (advisor)
The thesis deals with two main goals, namely the acceleration of data analysis and the subsequent visualization of this data. The purpose is to speed up the supplied application so that it is suitable for protecting optical infrastructures through real-time analysis of polarization state changes and visualization of its outputs. The thesis describes topics that are important in terms of accelerating computations on the graphics processor, particularly principles of parallelism, parallel programming, processes, threads, and parallel architectures. In addition, the thesis describes the capabilities of the Jetson Nano platform. The output of the thesis is an application that is capable of performing computations on the graphics processor and has a web interface for visualizing the analyzed data. The PyTorch library was used for acceleration on the graphics processor. Visualisation was achieved through the React framework in conjunction with the react-spectrogram and ApexCharts libraries.
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Distributed acoustic sensing system data analysis applied for perimeter protection
Senčák, Jakub ; Dejdar, Petr (referee) ; Tomašov, Adrián (advisor)
Táto práca sa zameriava na snímanie optických vlákien pomocou distribuovaného akustického snímania. Cieľom bolo vytvoriť multiplatformovú aplikáciu na vizualizáciu údajov získaných zariadení Optasense ODH-F. Táto práca bola motivovaná nedostatkom aplikácií s otvoreným zdrojovým kódom na vizualizáciu pre snímanie pomocou optických vlákien. Práca vysvetľuje distribuované akustické snímanie a efekty rozptylu svetla, ako je Rayleighov, Ramanov a Mandelsamov-Brillouinov rozptyl. Výsledkom práce je webová aplikácia. Aplikácia sa skladá z dvoch hlavných častí - server napísaný v jazyku Python a klientská časť implementovaná vo frameworku Svelte. Výsledky tejto práce možno použiť ako základ pre vytvorenie vizualizačného softvéru pre distribuované akustické snímanie.
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Anomaly and threat detection in audit logs using machine learning
Ludes, Adam ; Ježek, Štěpán (referee) ; Tomašov, Adrián (advisor)
Tato práce představuje softwarové architektury založené na cloudu, techniky detekce anomálií, strojové učení a analýzu dat za účelem vytvoření modelu pro detekci anomálií v audit lozích z Red Hat OpenShift Container Platform. Jsou představeny statistické metody a analýza časových řad pro detekci anomálií, zatímco jsou implementovány a hodnoceny modely strojového učení a techniky předzpracování dat. Výsledky ukazují omezení tradičních modelů při zpracování anomálií v hluboce vnořených datech, zatímco model zpracovávající přirozený jazyk prokazuje robustní výkon. Tato práce poskytuje cenné poznatky a může být použita jako reference pro výzkum i praxi v oblasti softwarových architektur založených na cloudu, detekce anomálií, strojového učení a analýzy dat.
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Secured transfer of digital messages
Horký, Matyáš ; Juráň, Radovan (referee) ; Tomašov, Adrián (advisor)
Diplomová práce zkoumá alternativní přístup k e-mailu. Ten, i když je nejběžnější a univerzální způsob komunikace přes internet s téměř kýmkoliv online, ať jde o soukromou osobu nebo organizaci, trpí technickými i praktickými problémy, jakými jsou například absence soukromí nebo spolehlivosti. Práce hodnotí ekosystém e-mailu, spolu s aktuálním stavem kryptografie, a navrhuje nový protokol a datový formát který by mohl být použit téměř transparentně. Protokol je postavený nad mTLS a PKI; definuje konkrétní zprávy které mohou být použity k dohodnutí přenosu dat mezi klienty a servery. Datový formát je vlastní lineárně čitelný binární formát, strukturovaný způsobem hlavička–délka–data. Výsledek je vyhodnocen jeho přínosy a nevýhodami, spolu s obecným zamyšlením o důležitosti a místu e-mailu v současném internetu.
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OTDR optical path analyzer
Šimková, Barbora ; Tomašov, Adrián (referee) ; Dejdar, Petr (advisor)
The aim of this master's thesis was a theoretical analysis of OTDR issues, analysis of OTDR device components, as well as basic parameters of this device. The thesis also includes a theoretical analysis of reflections, scattering, and various types of connectors. In the practical part, a circuit design for OTDR measurement was developed and subsequently implemented. The circuit was realized using the Red Pitaya development board and Koheron laser. Additionally, a circuit for direct method measurement was also created. In the LabView development environment, a program was created, including a graphical user interface. A laboratory task was also designed to provide a basic understanding of OTDR measurement issues.
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Performance comparison of a signal processing pipeline execution using CPU and GPU
Tomašov, A. ; Horváth, T.
The paper compares the execution performance of NumPy and PyTorch mathematical libraries in embedded systems with graphics processing unit (GPU) acceleration. Both frameworks execute a signal processing pipeline from a fiber manipulation detection system, which inspects a signal from a state of polarization analyzer to enhance the security of optical fiber. The performance comparison is evaluated in the NVIDIA Jetson Nano system with 128-core Maxwell GPU. Based on the measured results, the PyTorch library executed on the GPU has performance improvement from 59 % to 84 % on different batch sizes. The results prove the real-time analysis capabilities of such a system with GPU acceleration.
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Implementation of SCADA architecture into fiber optic seNSING systems
Šišolák, Filip ; Tomašov, Adrián (referee) ; Dejdar, Petr (advisor)
The bachelor thesis deals with the issue of data control and acquisition using SCADA technology and the subsequent implementation of two-way communication. The theoretical examination also includes an analysis of the current state of use of SCADA in optical sensing systems. In view of the shortcomings of the available SCADA systems, our own software programmed in the LabVIEW development environment is implemented. The Modbus TCP protocol is used for communication with the myRIO platform. Part of the work is also the analysis of the maximum achievable throughput with the Modbus TCP protocol.
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Optical network design
Polaček, Adam ; Tomašov, Adrián (referee) ; Horváth, Tomáš (advisor)
This bachelor thesis deals with the design of a technological optical network for the area of Hradec Králové, for the company ČEZD Distribuce. The theoretical part of the thesis describes the current network design and discusses network protocols. The practical part of the thesis describes the passive part and the logical part of the network. An important part of the thesis, is the fiber scheme and configuration design for router and switch. In the last part of the thesis, simulation in GNS-3 program is shown.
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Measurement and monitoring of optical fiber infrastructures
Baláž, Dominik ; Tomašov, Adrián (referee) ; Münster, Petr (advisor)
This bachelor thesis deals with measurement and monitoring methods on optical path. The basic principles and transmission using optical fibers, optical fibers, band splitting and transmission characteristics such as attenuation and dispersion are discussed. The principle of wave multiplexing and recommendations according to ITU-T standards are also presented. Afterwards, measurements on optical fibres are described, instruments and methods for measuring and monitoring the optical path are presented in detail, and these instruments are compared in terms of their parameters and individual functions. In the practical part, cleaning of connectors, inspection of connectors, measurement of optical path without bending and with different bend radii using OTDR, direct method and measurements using FC BERT application, which is a substitute for the monitoring system, are described, the values from these measurements are evaluated both numerically and graphically.
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