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Laser vibrometer with 2D scanning system
Rajm, Martin ; Klusáček, Stanislav (referee) ; Havránek, Zdeněk (advisor)
This thesis deals in the theoretical part with the non-contact vibration measurement by single point Laser Doppler vibrometer and it concretes constructions used in practice. It deals also with the possibilities of the laser beam scanning to measure the vibrations in the plane and there are also listed suitable-commercial systems for this solution. Mentioned sweep is immediately necessary for 2D scanning vibrometer construction. In the practical part, the single-point laser vibrometer OFV-5000 was expanded by scanning galvo system, supplemented by a measuring cards for signal acquisition from the vibrometer and suitable control hardware was chosen for mentioned laser. For the resulting hardware assembly was designed and implemented in LabVIEW measurement software, to control the 2D scanning system, to set the position of the laser beam and to process and to visualize of measured vibration signals in the plane. The functionality of the developed measuring system was checked by performed measurement and visualization of the velocity vibration of restraint girder, excited by shaker.
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Design of Portable 3D Scanner
Štigler, Jaroslav ; Rubínová, Dana (referee) ; Sovják, Richard (advisor)
The topic of this bachelor‘s thesis is design of handheld 3D scanner. This scanner belongs in the higher price category. This thesis deals with problems like long working time, watching monitor during scanning, versatility and safety measures from mechanical damage. Ergonomic solution is also very important. This design is based on a simple and functional shaping. Shaping and color solution corresponds with its use in industry. This scanner also can be used in other fields (for example: medical sector, design, archeology, etc.).
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Network Protection Using NetFlow Data
Czudek, Marek ; Tobola, Jiří (referee) ; Žádník, Martin (advisor)
This thesis deals with the possibility of greater security of network based on NetFlow protocol. Specifically, the detecting network scans based on predefined rules to found this anomaly in the NetFlow data. Next part is the possibility of retrospective data analysis, thereby achieving more accurate detection of attacks on the network. In this work designed application uses predetermined rules to detect the scans and then looks the flows towards the ports witch are protected by the application and than compares with detected scans. In this way, more accurate detection of attacks is achieved.
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Automatization of an optical setup for time-resolved spectroscopy
Šimek, Daniel ; Klenovský, Petr (referee) ; Dvořák, Petr (advisor)
Time-resolved spectroscopy is a modern method enabling the analysis of the dynamics of quantum luminescence transitions. This method uses ultra-fast light pulses to study materials, which makes it possible to observe the time evolution of luminescence quenching and thus provides additional information for static absorption and emission spectroscopy. This diploma thesis deals with the automation of the optical setup used in the Optical and Plasmonic Laboratory at Ceitec Nano for performing time-resolved spectroscopy. As part of the work, an application was created enabling communication with 13 devices used in the laboratory. The application automates already performed measurements, and in addition enables the scanning of samples, which was not possible due to time constraints due to the manual control of the stage movement. At the end of the work, test measurements are performed, with a discussion of their effectiveness and time savings for the user.
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Coordinate measuring machines
Palásek, Vítězslav ; Zachoval, Luboš (referee) ; Zachoval, Luboš (referee) ; Pernikář, Jiří (advisor)
This graduation work is about co-ordinal measuring machines (CMM) with optical reader system and optical CMM. In accordance with submission and in terms of survival well known contactless systems the direction is to make methodology objective classification of rating with granting summary of these systems. The first part contains optical principles for visual scanner in CMM and optical CMM. Ist is described there principle of contactless obtaining steric digital version of measured object with using laser and optical facilities. The second part contains brief makes survey of these contactless systems and their component which are used for co-ordinal measuring. The survey is devided into optical readers, which are put on CMM brake or on mobile measuring brake and on optical CMM, which localize position measuring/sensing head in the space or they read measured object from specific distance – fotogrammetric. Characteristic of offered systems and chart with technical data are mentioned with each maker. The third and fourth part is about submission methodology for objective choice suitable sort of reader, optical CMM in target of characteristic reader system quality. And from this methodology is given the choice of suitable exponent stationary measuring machine with contact and contactless way of reading and their comparison.
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Cryptocurrency Node Monitoring
Zaujec, Andrej ; Grégr, Matěj (referee) ; Veselý, Vladimír (advisor)
Cielom tejto bakalarskej prace je monitorovanie uzlov v Bitcoin peer-to-peer sieti a odhadnutie velkosti siete v danom case. Monitorovanie uzlov zahrnna zbieranie metadat o danych uzloch a tiez aj vytvaranie zaznamov cinnosti o tom ako dlho boli jednotlive uzly sucastou siete. Navrhnute riesenie vyuziva Bitcoin Core klienta bez dalsich modifikacii na zistenie vsetkych informacii o sieti a uzloch. Implementovana platforma umoznuje zbieranie metadat (verzia protokolu, verzia agenta, ponukane sluzby, IP adresa, cislo portu) o najdenych uzloch. Taktiez je schopna ziskavat informacie o tom, ktore uzly sa nachadzaju v sieti v danom case. Vytvorene API ponuka zozbierane data z platformy. Kazda komponenta platformy je zapuzdrena v Docker kontajneroch co umoznuje jednoduche nasadenie celej platformy v priebehu niekolkych minut.
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Creating a Depth Map of Eye Iris in Visible Spectrum
Kubíček, Martin ; Kanich, Ondřej (referee) ; Drahanský, Martin (advisor)
Diplomová práce si dává za cíl navrhnout a uvést v praxi metodiku snímání oční duhovky ve viditelném spektru. Klade přitom důraz na kvalitu snímků, věrohodné podání barev vůči reálnému podkladu a hlavně na kontinuální hloubku ostrosti, která odhaluje dosud nezkoumané aspekty a detaily duhovky. V poslední řadě se také soustředí na co nejmenší vystavení duhovky fyzickému stresu. Metodika obsahuje přesné postupy jak snímat duhovku a zajištuje tím konzistentnost snímků. Tím umožní vytvářet databáze duhovek s ohledem na jejich vývoj v čase či jiném aspektu jako je například psychologický stav snímané osoby. Na úvod je v práci představena anatomie lidského oka a zejména pak duhovky. Dále pak známé způsoby snímání duhovky. Následuje část, jež se zabývá správným osvětlením duhovky. To je nutné pro požadovanou úroveň kvality snímků zároveň ale vystavuje oko velkému fyzickému stresu. Je tedy nutné najít kompromis mezi těmito aspekty. Důležitý je popis samotné metodiky obsahující podrobný popis snímání. Dále se práce zabývá nutnými postprodukčními úpravami jako je například složení snímků s různou hloubkou ostrosti do jednoho kontinuálního snímku či aplikací filtrů pro odstranění vad na snímcích. Poslední část práce je rozdělena na zhodnocení výsledků a závěr, v němž se rozebírají možné rozšíření či úpravy metodiky tak, aby ji bylo možné použít i mimo laboratorní podmínky.
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Using Children's Literature in Teaching English at Elementary Schools
Vraštilová, Olga ; Mánek, Bohuslav (advisor) ; Mothejzíková, Jarmila (referee) ; Čermák, Jan (referee)
of the thesis The dissertation thesis deals with the problem of using children's literature in teaching foreign languages at elementary schools. It frames the topic by Czech curricular documents and constituents of the teaching-learning process, provides a historical survey and lists the genres of the children's literature. It characterizes the skill of reading in foreign language teaching and deals with the position of the literary text and lesson planning with children's literature within the foreign language teaching process. Attention is also paid to children's literature as the constituent of the pre-service teacher training. The aim of the thesis is to find out whether children's literature is used in foreign language teaching at elementary schools, whether contemporary textbooks use it, how it is perceived by in-service and pre-service teachers and last but not least what children's literature in the teaching-learning process of foreign languages has to offer. Research tools used for the purposes of the thesis were questionnaires, observations, specially prepared teaching materials based on literary texts and analysis of a textbook. The research proved that children's literature is used both by contemporary textbooks and by teachers in the foreign language education process. Since there is...
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Impact Of Active Scanning On The Industrial Control Networks
Pospíšil, Ondřej
This article deals with the impact of active scanning on industrial networks. The impacton industrial networks is commented from the perspective of the penetration tester methodology.This topic is important because active scan tools are affordable and easy to use, and their intrusiveimpact on industrial devices can be critical. The article’s main goal was to evaluate the impact on theindustrial network from the penetration tester point of view using the most popular tools for activenetwork scanning. In order to demonstrate and evaluate the results, an industrial testbed based on realindustrial hardware was built for the article. The article also demonstrated how to use the informationobtained by scanning for a Denial of Service attack.
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