National Repository of Grey Literature 156 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Interspecific nest parasitism in diving ducks - Common Pochard Aythya ferina and Tufted Duck Aythya fuligula and its effect on reproductive performnce
Neužilová, Šárka ; Musil, Petr (advisor) ; Weidinger, Karel (referee) ; Procházka, Petr (referee)
This PhD thesis is connecting three publications and one manuscript and focuses on the study of interspecific nest parasitism among particular duck species of family Anatidae. The first part describes the occurrence of interspecific nest parasitism, in the study area of Trebon between years 1999 and 2008 in three diving duck species (Aythini): the Common pochard (Aythya ferina), the Tufted duck (Aythya fuligula) and the Red-crested Pochard (Netta rufina) and two dabbling duck species the Gadwall (Anas strepera and the mallard (Anas platyrhynchos). The most of parasitic eggs was laid by Red-creasted Pochard and Common Pochard. In this period, inter-specific nest parasitism was recorded in 6.6% of nests. The values were compared with the results of studies in the same species between 1975 and 1980. when inter-specific nest parasitism was in 13.9% of nests. The difference in rate of nest parasitism is caused as a result of a decline in breeding populations of the studied species. In the second analysis, we investigate whether parasitically laid eggs are of different size than non-parasitic eggs in three diving duck species; the Common Pochards, the Tufted Ducks and the Red-Crested Pochards. Parasitic eggs of the Common Pochard were significantly longer than non-parasitic eggs of the same species and...
Testbed for remote vehicle speed limitation
Šíma, Jindřich ; Musil, Petr (referee) ; Dvořák, Jan (advisor)
Bachelor thesis focuses on planing and realisation of workplace for remote vehicle speed limitation. In the theoretical part there is an analysis of intelligent transportation systems, on-board units, messages in the communication of units and the Vanetza library, which implements standards for communication of units. Practical part consists of planing and realisation of workplace for remote vehicle speed limitation, description of workplace components, the procedute for setting it up, capturing and analyzing communication in the workplace.
Testbed for remote vehicle speed limitation
Šíma, Jindřich ; Musil, Petr (referee) ; Dvořák, Jan (advisor)
Bachelor thesis focuses on planing and realisation of workplace for remote vehicle speed limitation. In the theoretical part there is an analysis of intelligent transportation systems, on-board units, messages in the communication of units and the Vanetza library, which implements standards for communication of units. Practical part consists of planing and realisation of workplace for remote vehicle speed limitation, description of workplace components, the procedute for setting it up, capturing and analyzing communication in the workplace.
Design of a system for detecting devices connected to the electrical network
Homola, Michal ; Kováč, Daniel (referee) ; Musil, Petr (advisor)
This master's thesis deals with the design of a system for detecting devices connected to power line network using the measurement of high-frequency noise through BPL (Broadband over Power Line) modems. The theoretical part involved familiarization with Power Line Communication (PLC), electromagnetic compatibility (EMC), impedance issues in PLC, and characteristics of noise in PLC. In the practical part, the suitability of the chosen PLC modems for the actual measurement was verified, followed by the measurement of temporal and spatial variability of network noise characteristics using these modems.For temporal variability, an experiment involving long-term measurement of refrigerator activity was conducted. For spatial variability, measurements were taken at multiple locations, with some locations serving as a training set and the remaining ones as a testing set. After selecting an appropriate machine learning model, the input data were feature engineered accordingly, followed by their evaluation.
Compensation of Temperature Instability of the Received Signal Level of Microwave Links
Repa, Pavol ; Musil, Petr (referee) ; Bubniak, Milan (advisor)
This thesis deals with the field of microwave links. Specifically, it is concerned with compensating for the temperature instability of the received signal level of microwave links. This problem is solved according to the proposed algorithm, which can be used to suppress the temperature waveforms, and thus achieve better results in the calculation of collisions in the Telcorain software application. A compensation algorithm has been developed to compensate for microwave links with strong temperature dependence. By~compensating for these non-compliant microwave links, it was possible to reuse them in the calculation of the average rainfall intensity, and hence they were retained in~the~generation of the 2D rainfall maps. The compensation algorithm is implemented in the~Telcorain application, where the individual results of the precipitation calculation can be verified. Throughout the thesis, microwave joints from two manufacturers, each with a~different technology used, were analysed. Their comparison with each other is~the~focus of this thesis, in which the individual differences between these microwave links are published.
Acceleration of Particles Tracking on CBM Experiment
Roth, Michael ; Kolář, Martin (referee) ; Musil, Petr (advisor)
The focus of this work is to research various methods of particle track reconstruction in the CBM experiment, and the problem of hardware acceleration of these methods. The advantages and disadvantages of the extended methods were discussed and a reconstruction method based on cellular automata and Extended Kalman filters was selected for further study. In particular, the thesis details the development of a simulation model suitable for generating test data to facilitate the implementation of the selected tracking algorithm, which was subsequently sped up using distributed computing methods. Two different particle simulation models and a reconstruction algorithm were implemented, with the reconstruction algorithm offering up to 800 per cent speed up factor in respect to the sequential algorithm and up to four orders of magnitude lower memory complexity.
Using Synthetic Data for Improving Detection of Cyclists and Pedestrians in Autonomous Driving
Kopčilová, Zuzana ; Musil, Petr (referee) ; Smrž, Pavel (advisor)
This thesis deals with creating a synthetic dataset for autonomous driving and the possibility of using it to improve the results of vulnerable traffic participants' detection. Existing works in this area either do not disclose the dataset creation process or are unsuitable for 3D object detection. Specific steps to create a synthetic dataset are proposed in this work, and the obtained samples are validated by visualization. In the experiments, the samples are then used to train the object detection model VoxelNet.
Security system for detecting devices connected to the electrical network
Macho, Radim ; Kováč, Daniel (referee) ; Musil, Petr (advisor)
This semester thesis defines the basic principles of detection of devices connected to the power grid with regard to their potential threat to the operation of critical systems. The detection will be performed using data obtained from PLC modems connected to the monitored electrical network. The data will then be processed using machine learning-based code.
Secure web application for surface temperature monitoring based on machine learning methods
Hejna, Jan ; Bubniak, Milan (referee) ; Musil, Petr (advisor)
The bachelor thesis is focused on the exploration of the influence of solar radiation on the measured temperature by temperature sensors in microwave devices and on the possibilities of quantifying this influence. The thesis explores the possibility of using these devices to measure ambient temperature using selected machine learning methods. The aim was to create a secure web application that will be used for area-based ambient temperature monitoring, thus expanding existing networks of meteorological measurement points. The theoretical part of the thesis focuses on the technology of microwave links and the environmental influences that affect the measured temperature of these devices. In the practical part of the thesis, a correlation analysis was performed between the measured temperatures from different telecommunication equipment technologies and the temperatures of the surrounding meteorological stations. The analysis aimed at selecting an appropriate technology for ambient temperature prediction. The next part of the practical work involved the process of training a machine learning model. The last part involves the development of a web application that displays temperature maps of the Czech Republic.
Design of a system for detecting devices connected to the electrical network
Homola, Michal ; Kováč, Daniel (referee) ; Musil, Petr (advisor)
This master thesis deals with the creation of a system for detecting devices connected to the power network using the measurement of high-frequency noise obtained via BPL modems. In the theoretical part, there was an introduction to the issue of PLC, electromagnetic compatibility of EMC, the issue of impedance in PLC and noise characteristics in PLC. In the practical part, measurement of noise characteristics for individual devices and the creation of a dataset took place. The dataset, which was then tested on five machine learning models selected for this task based on their properties. Finally, the suitability of each model for our application was evaluated.

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