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FSK modem with AX.25 protocol
Vojtek, Michal ; Šebesta, Jan (referee) ; Fuchs, Michal (advisor)
The purpose of this thesis is to design FSK modem for Packet communication. In accordance with accessible literature was constructed functioning circuit schema and subsequently there was constructed a motherboard which is mainly assembled from SMD technology. It makes this modem mobile and very easy usable in terrain. Modem communicates with PC via USB bus. Also this bus is used as power source for this device. Communication between modem and PC is realized by KISS protocol and connection with tranciever is realized by AX.25 protocol.
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Automatic System for Load Characteristics of Power Supplies Measurement
Vojtek, Michal ; Dřínovský, Jiří (referee) ; Šebesta, Jiří (advisor)
The target of this work is create device, which will automatic measure values for find out loading characteristics of power supply with help of built-in electronic load. In case, that source of current supply will for example DC/DC convertor, measurement of input current and input voltage will be possible. Then there is no problem with determinate total efficiency of this power supply. Measuring system will be conected via serial interface of type USB with computer. It will be possible to save found out values with help of control program for nother processing. Control unit of whole system will be suitable microcontroller.
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Boilers for house heating
Vojtek, Marek ; Moskalík, Jiří (referee) ; Baláš, Marek (advisor)
This bachelor´s thesis is focused on boilers available for house heating. In the first part there is the characteristic of natural gas used as a fuel, dividing of gas boilers, description of gas boilers an description of the main parts of gas boilers. In the second part there are compared two different houses with different gas boilers from the economic point of view.
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Macroeconomic Factors as Drivers of LGD Prediction: Empirical Evidence from the Czech Republic
Belyaev, Konstantin ; Belyaeva, Aelita ; Konečný, Tomáš ; Seidler, Jakub ; Vojtek, Martin
This paper focuses on key macroeconomic driving factors influencing the loss given default (LGD) – an important credit risk parameter determining credit losses of the banking sector. Various econometric approaches are applied on both individual and aggregated data for different bank segments in order to identify the sensitivity of LGD parameters to both the micro characteristics of debtors and aggregated macro-level data. Despite the relatively low importance of macro variables in the model combining micro- and macroeconomic information, our estimates suggest that the macroeconomic environment contributes directly to the variation in LGD. The results from the different approaches confirm a negative link between LGD and consumption growth for the retail portfolio, while in the case of the corporate segment, a negative link between LGD and real GDP growth is identified. Importantly, given that aggregation effects and non-linearities may substantially affect the choice of relevant macroeconomic variables, it is essential to distinguish between models employing purely macroeconomic data and models combining micro- and macro-based information.
Fulltext:  PDF
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The concept of reporting in cost controlling
Vojtek, Michal ; Novotný, Ota (advisor) ; Ulrych, Jiří (referee)
This diploma thesis describes a proposal of a new conception of cost controlling reporting in Česká spořitelna for next period. This reporting concept consists of a description of the dimensional model (including a detailed description of dimensions and metrics reporting), the application architecture design and benefits of the new solution. The theoretic part focuses on specification of the basic reporting terms that are further developed in a practical part. Specifically, this section describes and categorizes reporting, including identification of the main groups of users (consumers) reports, identifies the main reporting components - requirements, tools and architecture. The practical part consists of three chapters supporting the achievement of the main targets. The first chapter defines the role of cost controlling, describes the current reporting conception through the model of application architecture. At the end, it summarizes the main limitations and shortcomings of the current reporting concept. The second chapter is fully devoted to the Erste reporting, and evaluates new demands and reporting requirements. The part of chapter is a catalogue of reports and reporting road map. It serves as a dashboard that can warn against potential operational risks. The last chapter meets the main goal and introduces a solution of reporting concept of cost controlling. The benefits of work can be especially found in practical application in Česká spořitelna. Currently, the first implementation phase of the Hyperion planning application has been realized. Moreover subject of my thesis can serve as a valuable source of information describing both current and final status of cost reporting.
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The design of database for hotels and guest houses
Vojtek, Michal ; Palovská, Helena (advisor) ; Strossa, Petr (referee)
This bachelor's thesis presents an analysis, design and implementation of a database solution for hotels and guest houses. The main objective of the thesis is to design an efficient database solution covering the functionality of booking, online access, invoicing and complaints systems. It is a comprehensive database solution providing information support both in normal operation and for management work. The secondary objectives can be defined as methods of using the database and the identification of the database user. The thesis has been prepared based on my own experience. The first part of the thesis introduces the systems using the database; this does not refer to any specific applications but only to generally defined systems for which the thesis outlines a potential use for the database. The second part deals with the possibilities offered by the database for specific persons who come in contact with this database. The third part describes a conceptual data model, explaining all its entities and relationships and clarifying the use of integrity constraints. The fourth part introduces another integrity constraint and analyses a database adjustment for RDBMS Oracle Database Express Edition 10g, in which the functionality of the database was tested. The last part proposes security measures and defines access authorizations for tables, introduces created views limiting the volume of data visible for users, and stored procedures serving to automate certain activities.
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