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Articulated vehicle kinematics
Roman, Matej ; Glos, Jan (referee) ; Pohl, Lukáš (advisor)
The goal of this thesis, is to create a kinematic model of an articulated vehicle. The first part deals with finding equations of state of this system and its control driving in reverse. The second part is dedicated to implement the model in the Matlab Simulink environment and to simulate and demonstrate the functionality of control on simple examples, typical for driving in reverse. In the last part a real model is created to test the functionality of control.
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Automated measurements of body temperature against COVID-19
Roman, Matej ; Lázna, Tomáš (referee) ; Chromý, Adam (advisor)
This thesis focuses on the development of an open source software capable of automatic face detection in an image captured by a thermal camera, followed by a temperature measuring. This software is supposed to aid in the COVID-19 pandemics. The developed software is independent of used thermal camera. In this thesis, I am using TIM400 thermal camera. The implementation of the face detection was achieved by an OpenCV module. The methods tested were Template Matching, Eigen Faces, and Cascade Classifier. The last-mentioned had the best results, hence was used in the final version of the software. Cascade Classifier is looking for the eyes and their surrounding area in the image, allowing the software to subsequently measure the temperature on the surface of one's forehead. One can therefore be wearing a face mask or a respirator safely. The temperature measuring works in real time and the software is able to capture several people at once. It then keeps a record of the temperature of each measured individual as well as the time of the measurement. The software as a whole is a part of an installation file compatible with the Windows operating system. The functionality of this software was tested – the video recordings are included in this thesis.
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Holocene history of Arctic lakes
Roman, Matěj ; Nývlt, Daniel (advisor) ; Kavan, Jan (referee)
Holocene history of Arctic lakes Abstract Palaeolimnology in the Arctic has achieved a considerable progress in the last decades. The Arctic has changed markedly since the Last Glacial and glacier retreats caused formation of a great number of diverse lake types. Lakes of glacial origin, thermokarst lakes, fluvial lakes and lakes on raised beaches occur most often here. Palaeolimnological methods applied to the high latitude areas are used for the study of the history of individual lakes. Methods of correlation of sedimentary cores and basic interpretation of proxy records such as magnetic susceptibility, diatom biostratigraphy and content of carbon and sulphur were applied on sediments of Garmaksla Lake, Svalbard Archipelago. Climatic and ecological shifts including the Little Ice Age termination and recent warming were registered in proxy values. Keywords: lakes, palaeolimnology, palaeoclimatology, environmental changes, Holocene, Arctic
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Automated measurements of body temperature against COVID-19
Roman, Matej ; Lázna, Tomáš (referee) ; Chromý, Adam (advisor)
This thesis focuses on the development of an open source software capable of automatic face detection in an image captured by a thermal camera, followed by a temperature measuring. This software is supposed to aid in the COVID-19 pandemics. The developed software is independent of used thermal camera. In this thesis, I am using TIM400 thermal camera. The implementation of the face detection was achieved by an OpenCV module. The methods tested were Template Matching, Eigen Faces, and Cascade Classifier. The last-mentioned had the best results, hence was used in the final version of the software. Cascade Classifier is looking for the eyes and their surrounding area in the image, allowing the software to subsequently measure the temperature on the surface of one's forehead. One can therefore be wearing a face mask or a respirator safely. The temperature measuring works in real time and the software is able to capture several people at once. It then keeps a record of the temperature of each measured individual as well as the time of the measurement. The software as a whole is a part of an installation file compatible with the Windows operating system. The functionality of this software was tested – the video recordings are included in this thesis.
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Articulated Vehicle Kinematics
Roman, Matej
The goal of this paper, is to create an articulated vehicle kinematics model in the Matlab Simulink program, to find equations of state of this system and implement them in the Simulink environment, and to simulate and demonstrate movement of the articulated vehicle on simple examples, typical for driving in reverse. In this paper, the articulated vehicle’s kinematics will be described without taking its dynamics into account.
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Articulated vehicle kinematics
Roman, Matej ; Glos, Jan (referee) ; Pohl, Lukáš (advisor)
The goal of this thesis, is to create a kinematic model of an articulated vehicle. The first part deals with finding equations of state of this system and its control driving in reverse. The second part is dedicated to implement the model in the Matlab Simulink environment and to simulate and demonstrate the functionality of control on simple examples, typical for driving in reverse. In the last part a real model is created to test the functionality of control.
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Morphology of thermal-contraction-crack features and their pattern
Dufek, Jaroslav ; Křížek, Marek (advisor) ; Roman, Matěj (referee)
This bachelor thesis deals with phenomenon of periglacial landscape of continuos permafrost such as thermal-conctraction-crack polygons and forms of their secondary infill - ice, sand, soil and composite-wedge pseudomorphs. Upper Pleistocene thermal-conctraction-crack polygons are located in mid-latitudes all across the Europe. Most common geometry shapes of these polygons are orthogonal and hexagonal patterns. Pseudomorphs are commonly situated in areas of lowlands, river terraces, floodplains on slopes with angle up to 4ř. Their distribution is closely associated with the maximum extent of past permafrost during the last glacial episode (~17-25 ka BP). This pleistocene phase is known as last periglacial maximum (LPM; Vandenberghe et al. 2014). Creation of ice-wedges is primarily bound to present continuous permafrost, which the southernmost Pleistocene limit in Europe has been established to 47ř N (Black 1976, Vandenberghe et al. 2014). However, some research suggest, that with favorable local conditions, ice-wedges can develop also in arid climate and discontinuous permafrost zone and they can occur together with sand-wedges (Kasse 1998). It was also found that cold arid climate is not the only factor for sand wedge development, but great importance has also local variability of microrelief such...
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Holocene climate changes in the High Arctic
Prochová, Dominika ; Vondrák, Daniel (advisor) ; Roman, Matěj (referee)
Climatic changes are nowadays frequently discussed subject in the scientific, political and public sphere. For better understanding of their causes, development and possible impacts is one of the basic prerequisites for investigating such anomalies, that have taken place in the past. In natural archives, it is possible to find records not only about their parameters but also about the mentioned impacts - ecosystem changes, earth surface's geomorfological transformartions or the impact on human society. The most studied period of geological time is Holocene. It is about the most recent period and we currently live in its third stage. Thankfully, due to relatively sufficient knowledge of its climatic anomalies we are able to study the climate's contribution with enough complexity to valorize the currently much observed global warming, witch is often connected to human activity. The Arctic is probably the most sensitive place to climate changes on the planet. The warming, that is currently observed around the globe, is there noticeably higher - by the end of the 20th century, the average annual temperature increased twice as fast. The aim of this thesis is, in the form of literary research, to describe and examinatie the climate development in high Arctic areas, potencially the most sensitive...
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Correlation of abiotic proxies in Holocene lacustrine sediments of Peri-Atlantic Arctic
Roman, Matěj ; Nývlt, Daniel (advisor) ; Sedláček, Jan (referee)
The peri-Atlantic Arctic, one of the most sensitive components of the Earth climate system, experienced pronounced climatic fluctuations during the Holocene. Several external forcings were considered responsible for these variations, including decline of insolation on the Northern Hemisphere, changes in distribution of land ice mass, explosive volcanism, or changes in atmospheric and oceanic circulation. In order to explore the driving mechanisms of the peri-Atlantic Arctic environmental variability, three sites located in different parts of the region were selected for palaeoenvironmental reconstructions with focus on extracting the climatic information. With this intention, sedimentary cores from i) Lake Garmaksla, Central Svalbard, ii) Jarfjorden, northeastern Norway, and iii) Kobbefjord area, southwestern Greenland, were retrieved and subjected to multi-proxy investigation. The absolute chronostratigraphic framework was established by comprehensive radiocarbon (14 C) and short-lived radioisotopes (210 Pb, 137 Cs) dating. Further analyses include measurements of magnetic susceptibility, grain size distribution, element composition by means of X-ray fluorescence (XRF), and elements bound to organic matter, i.e. organic carbon, nitrogen, sulphur and biogenic silica. The relationships between the...
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Holocene history of Arctic lakes
Roman, Matěj ; Nývlt, Daniel (advisor) ; Kavan, Jan (referee)
Holocene history of Arctic lakes Abstract Palaeolimnology in the Arctic has achieved a considerable progress in the last decades. The Arctic has changed markedly since the Last Glacial and glacier retreats caused formation of a great number of diverse lake types. Lakes of glacial origin, thermokarst lakes, fluvial lakes and lakes on raised beaches occur most often here. Palaeolimnological methods applied to the high latitude areas are used for the study of the history of individual lakes. Methods of correlation of sedimentary cores and basic interpretation of proxy records such as magnetic susceptibility, diatom biostratigraphy and content of carbon and sulphur were applied on sediments of Garmaksla Lake, Svalbard Archipelago. Climatic and ecological shifts including the Little Ice Age termination and recent warming were registered in proxy values. Keywords: lakes, palaeolimnology, palaeoclimatology, environmental changes, Holocene, Arctic
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