National Repository of Grey Literature 75 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Demonstrational programs for music record processing
Jonáš, Petr ; Rajmic, Pavel (referee) ; Číž, Radim (advisor)
This bachelor’s thesis describes the processing of music records and signals. Demonstra- tion programs were created in Matlab. In this thesis were created function of equalization, transposition and sound effects. In this thesis was created application for determining the similarity of signals.
High-speed optical transmission systems
Pekárková, Kateřina ; Číž, Radim (referee) ; Münster, Petr (advisor)
The diploma thesis is focused on high-speed optical connections using optical fibers for transmission and transmission systems with speeds above 100\,Gb/s. In the first part of the work, the theory of the area of optical high-speed connections is discussed, especially the work is focused on the coherent type of data transmissions. Modulation and multiplexing formats, chromatic dispersion, modal and polarization modal dispersion, optical fiber attenuation and nonlinear phenomena are also described. The theoretical part of the work also deals with the description of the differences between coherent and non-coherent transmission methods and the description of coherent high-speed optical transmission and its components. The practical part contains two laboratory tasks that, using simulations in the VPIphotonics environment, compare two-state and multi-state modulation for systems with a transfer rate of 10\,Gbit/s and 100\,Gbit/s. The properties of these modulation formats are demonstrated using decision eye diagrams, constellation diagram and bit error rate values for different lengths of optical fiber, which are the output of the simulation environment.
System for remote readings of gas, electricity and water consumption
Paulech, Matúš ; Číž, Radim (referee) ; Krajsa, Ondřej (advisor)
This thesis includes a system design for remote reading of gas, electricity, water and heat consumption. The thesis deals with the issue of remote meter reading. Furthermore, the thesis deals with the description of technologies and protocols, their advantages and disadvantages, the selection of the most suitable one and its applications. The thesis also deals with the design of hardware components, their construction and subsequent commissioning. The management of these components is ensured by the software that was created for this system.
Laboratory Device for Measuring Headphones
Holub, Kamil ; Číž, Radim (referee) ; Schimmel, Jiří (advisor)
This bachelor's thesis deals with the design and assembly of headphones test fixture. The introduction describes the types of headphones, their classification in terms of design and their typical specifications followed by a description of instruments for measuring headphones, defined by standards ČSN EN 60318 and their classification in terms of design and use. The following part is devoted to a design of a test fixture, which is subsequently put together using 3D printing. As part of the thesis, the measurement of frequency response and input impedances of various headphones is performed on the fixture. These are then compared with measurements on professional measuring devices. In the last part is described a laboratory task, which includes the measurement of headphones using this test fixture.
Demonstrational programs for music record processing
Jonáš, Petr ; Rajmic, Pavel (referee) ; Číž, Radim (advisor)
This bachelor’s thesis describes the processing of music records and signals. Demonstration programs were created in Matlab. In this thesis were created function of equalization, transposition and sound effects. In this thesis was created application for determining the similarity of signals. For both programs was created graphic user interface.
DSL analyzer
Hála, David ; Číž, Radim (referee) ; Šilhavý, Pavel (advisor)
This bachelor thesis is devoted to the development of an application for signal analysis using xDSL technology. The first part of the thesis describes the basics of these tech- nologies and the theoretical assumptions that can be expected in later analysis. Also the parameters measured by the resulting application are explained. The second part of the thesis is devoted to the description of the procedure and solution of the practical part of the thesis - program development. Finally, in the last chapter of the thesis, the program was tested in laboratory conditions and graphs were constructed from the results.
Gateway for monitoring maritime transport
Fučík, Stanislav ; Číž, Radim (referee) ; Musil, Petr (advisor)
This thesis addressed the monitoring of maritime traffic. The aim was to evaluate current solutions in the field of maritime traffic monitoring and to design and create new solution. The proposed solution is powered by solar panels and Li-Ion batteries. For sending data, satellite and mobile connections is be used. As a source of information about position GPS is used. The monitoring unit is equipped with sensors for measuring temperature, humidity, acceleration, intrusion of into the container and a detector of the opening door. The unit is resistant to the atmospheric influences prevailing sea and is operational long-term at sea.
Open Source IMS implementations
Ježek, Jiří ; Číž, Radim (referee) ; Šilhavý, Pavel (advisor)
The diploma thesis deals with open source implementations of IMS technology. The theoretical part describes the functioning of IMS and its architecture, including the protocols used, the process of registration and connection establishment, as well as potential security threats to IMS systems. Two open source IMS projects were selected, Open IMS Core and Project Clearwater, on which the work is focused. In its next part, the diploma thesis deals with the description of selected open source IMS projects, this part also includes a description of the implemented security of both projects and a detailed procedure of system installation with any necessary configuration. In its practical part, the diploma thesis focused on performance testing of selected projects using the Abacus 5000 hardware tester. First, initialization tests were performed, which verified the possibility of communication between the tester and the tested projects. Subsequently, it was possible to perform performance testing of selected projects. In performance testing, emphasis is placed on system stability, performance in the area of call set-up speed and response time of SIP messages and speed of user registration in the network, at different load levels. The systems have been tested for both call set-up and user registration. Part of the testing is also the implementation of the flood DoS inviteflood attack and the system's response to the increasing intensity of the attack. The last chapter is devoted to the comparison of selected IMS projects, where the test results are clearly presented. This chapter is partly based on publicly available information, such as the technical documentation of individual projects and possibly publicly available mailing lists. Part of the diploma thesis is also a laboratory task in which the student tries to work with Open IMS Core. The laboratory task focuses on the process of creating a user and his registration in the IMS network, establishing a call between individual users and internal routing in IMS networks. The task focuses mainly on signaling processes within the implemented tasks.
VDSL2 vplus and G.fast technologies and their testing
Vehera, Vladyslav ; Číž, Radim (referee) ; Šilhavý, Pavel (advisor)
This semester work focuses on the basic characteristics of the VDSl2 and G.fast technologies that allow to transfer data using old telephone lines. The theoretical part of the work describes the main parameters of all currently known profiles for VDSL and G.fast. There is also a description of DMT modulation, used in both types of DSL connections. Moreover, the theoretical part presents a vectoring technique that helps to increase the data transfer rate using a twisted pair. The work also provides methods for testing networks using the recommendations of RFC 2455, ITU-T Y.1564 and RFC6349. The practical part of this thesis contains all conducted tests and measuring, which were described in detail. The results od these tests were presented in the format of graphs and tables.
MIDI Controller for DAW Software Control
Korytář, Matěj ; Číž, Radim (referee) ; Schimmel, Jiří (advisor)
This thesis focuses on problematics of DAW controllers for sound production software. In this thesis is analysed Mackie Control protocol, one of used communication protocols. There is also an overview of MIDI messages, because Mackie Control protocol is based on MIDI protocol. The thesis contains two own DAW controller designs. First one is based on Mackie Control protocol, second one is based on Generic Remote which offers better customization.

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