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The use of ion exchanges for preconcentration of platinum group metals
Sýkora, Jiří ; Řezáčová, Veronika (referee) ; Komendová, Renata (advisor)
The aim of this thesis is the elaboration of a detailed literature review on the use of ion exchangers for the preconcentration of platinum group metals. This work contains an actual literature review on this issue. In this work you will find information about the current occurrence of platinum metals in the environment, their impact on health, properties, resources and the use. There are also described ways of decomposition, extraction and use of ion exchangers. In the experimental part this thesis deals with optimization of ion exchangers and following application of real samples from the city of Brno.
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Microelectronic Wireless Networks for Telemetry and Buildings Automation
Šulc, Vladimír ; Sýkora, Jiří (referee) ; Zeman, Václav (referee) ; Kuchta, Radek (advisor)
The thesis deals with a microelectronic wireless networks for telemetry and building automation in terms of energy consumption related to the communication in wireless networks. Assumption, mesh topology is optimal topology for wireless networks for telemetry and building automation, was proven and relation between energy consumption and devices management was shown and functional abstraction related to the energy consumption was described. Several advanced techniques and solutions on physical and network layers were proposed to increase network reliability and decrease power consumption. Proposed techniques can be easily implemented.
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The use of Electrical Properties of Composites with Modified Cement Matrix
Macháň, Ladislav ; Husák, Miroslav (referee) ; Sýkora, Jiří (referee) ; Šteffan, Pavel (advisor)
The dissertation thesis is focused on practical use of composite material with modified cement matrix. Especially the area of electrical behavior of composite materials in use has been examined, for strain sensing material. The experimental part solves the problematics of corrosion of carbon and metallic materials in alkaline environment of the cement matrix. The physical design of the sensor and its fabrication using functional composite cement material have been described here. The thesis has also discussed defining the influence of temperature change and humidity change on the change of electrical parameters of integrated sensors. An important part of the thesis is the area of evaluating a series of measurements of electrical parameters under dynamic loading. The thesis analyzes designed measurement method in detail, being suitable to determine electrical properties of cement composite materials including the construction of a monitoring system that enables practical application of sensors in complex structures.
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Microelectronics Time-Space Authentication Techniques
Jaroš, David ; Burda, Karel (referee) ; Sýkora, Jiří (referee) ; Kuchta, Radek (advisor)
This dissertation work focusses on using information about the location of the user during the authentication process on computer networks. With the growth of mobile computer devices over the last two decades the physical location of users is becoming one of the main issues for access management. This work researches existing solutions which are divided in to two groups related to the source of location information (SATNAV systems for example GPS and based on communication with active infrastructure such as GSM, Wi-Fi). This work shows the methodology for evaluating authentication data which use the principle of fuzzy logic. In comparison with binary logic it is possible to evaluate authentication data accurately. As a result of the authentication process the information is of a higher value, which can be taken into account when setting the levels of user privileges. An important aspect of working with location information is that the user is located in the same place and from where they are asking for access to the system. Solving this question could be linking user biometrics for example finger prints. This principle is used in two types of microelectronic authentication terminals which were developed in conjunction with this work. The first type of terminal uses a SATNAV receiver and an ISM wireless communication module as a source of location information. On the first type of authentication terminal newly developed authentication techniques were tested. The users biometrics are checked by finger print sensor with embedded processing. In the second type authentication terminal a Wi-Fi and GSM module were added for location purposes. In the conclusion of this dissertation the testing methodology of the data authorization and evaluation process of the second type of microelectronic authentication terminal is shown. This confirms the practicality of the suggested methodology and the time-space information in the authentication process.
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Quality of Service in Converged Systems with Elements Controlled by Neural Network
Polívka, Michal ; Sýkora, Jiří (referee) ; Křepelka, Václav (referee) ; Škorpil, Vladislav (advisor)
The Quality of Service (QoS) is in converged systems an important parameter. The dissertation thesis deals with research of QoS implementation into a newly developed network element. There was designed and implemented new protocol, based on the IP. The dissertation thesis deals with proposal of a new network element – the switch controlled by a neural network. During the research have been measured switches cross a performance classes. On the base of the measurement was designed the new four-port switch with switch fabric build on crossbar switch with an external control. The switch was designed with maximum QoS support. The switch fabric is controlled by the feedforward backpropagation neural network. The designed switch was modeled in the MATLAB and Simulink. The simulations prove that developed solution is functional.
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Classification of material used for the construction of garden ponds
Sýkora, Jiří ; Repková, Martina (referee) ; Komendová, Renata (advisor)
This thesis deals with the study of the occurrence forms of inorganic phosphorus in water garden ponds and used material impact on the amount of releasable amount of phosphorus in the form of phosphates in the water medium. The practical part of this work focuses on the analysis and subsequent classification of building materials for the production of garden ponds just by releasing ability of phosphorus in the form of phosphates in the water.
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Possible variants of distributions of the hand tools
Sýkora, Jiří ; Novák, Radek (advisor) ; Pacek, Čestmír (referee)
The thesis deals with only one of many problems of the founding plan dealing with online lending tools. It the thesis I'm interested in how the tools store and prepare to dispatch, how to distribute it and how to find the optimal way of distribution. The optimal way has been found as the result of a few imaginary distributions. The distances match to the reality. The stops have come from the estimate based on the demand analysis. The thesis is divided to two parts, to the theoretical and practical part. In the theoretical part are theoretically explained the used methods in the practical are the methods practically used.
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Performance testing of information systems
Klaška, Jan ; Novotný, Ota (advisor) ; Sýkora, JIří (referee)
This thesis if focused on performance, especially load testing of information systems. In the first part is defined software quality and reader is provided by fundamentals of software testing. Process of sofware testing is well described here. The rest of the paper is oriented on perfomance testing and it's processes and attributes. Specified are goals and principles of performance testing as well as types of performance tests and their purpose. Defined is load testing methodology including metrics for reliability and efficiency of information systems. Metrics are derived from well known international ISO standard 9126 - Software quality model. Methodology and metrics are validated during load test project on which author of this work participated. One chapter is also devoted to the tools used for load testing automatization. This paper is focused on the testing experts as well as on the other readers who want to acquire information on load testing, software efficiency or generally on testing of software quality.
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Ekonomická analýza společnosti Karma Český Brod, a.s.
Sýkora, Jiří ; Vávrová, Hana (advisor) ; Klečka, Jiří (referee)
Aim those analyses companies geyser Karma Cesky Brod a.s. is evaluation last financial management firm. She should after peruse give to information on financial position and health firm, inclusive evaluation basic financial and working diversifications. Also would had refer to strong pages company and identify offal that the would could in future development make for serious problem. In analysis try to disclose backlog and refer to new possibilities raising business efficiency. Economic analysis am try work up so, to was sufficient basis for future strategic planning development company.
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