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Calculation of electrodynamic forces acting on current path of a switching device
Benčo, Tomáš ; Bušov, Bohuslav (referee) ; Valenta, Jiří (advisor)
The master thesis is focused on the calculation of electrodynamic forces acting on the contacts of the moulded case circuit breaker Siemens 3VA5 from OEZ Letohrad. This work is divided into ten chapters. In the introductory chapter it is described why it is important to deal with the calculation of the electrodynamic forces and the design of the current path. The second chapter describes the problem of the origin and effect of electrodynamic forces on individual parts of the electrical device. The third chapter describes the parameters, properties and design of the 3VA5 Siemens circuit breaker. The fourth chapter describes the Finite Element Methods. The fifth chapter describes how to create a 3D current path model in Solidworks. The sixth to ninth chapter is focused on the stationary calculation of moments in the program Ansys Maxwell by means of Magnetostatic Analysis and on the calculation of the total repulsive force between contacts with the influence of ferromagnetic materials. The last chapter is focused on dynamic calculation of moments and forces acting on contacts in a certain time interval.
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Transfer and Backup of Text Messages (SMS)
Černý, František ; Křivka, Zbyněk (referee) ; Kolář, Dušan (advisor)
The subject of this bachelor thesis are two cooperating applications to backup, restore and to view SMS messages. The first of the implemented applications, designed for the Android operating system can backup and restore SMS messages using XML file. The application also enables synchronization of the imported file with existing short text messages. The second application is used as an extension for Thunderbird email client. This extension lets you view imported text messages, synchronize your saved short text messages with contacts in SMS threads, search in saved file and synchronize existing SMS information with newly imported file. The extension also allows exporting a file with SMS messages and uses this exported file in application for Android operating system.
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Possibilities of companies advertisement on fairs
Fusková, Michaela ; Klasová, Jana (referee) ; Dvořák, Jiří (advisor)
The bachelor´s thesis is focused on promotion of TONDACH Česká republika, Ltd. company on the fairs. It includes informations of different kinds of advertising on the fairs, possibilities and exhibits how efektively turn fairs into a profits. Also which forms are effective and which aren’t. Above all this the bachelor is focused on proposition of the optimal structure of advert on the fairs.
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Contact List Management for Android
Kasala, Viliam ; Křivka, Zbyněk (referee) ; Kolář, Dušan (advisor)
This bachelor thesis describes the design and implementation of tool that is able to from / to the memory card import, export and synchronize contacts data stored in the native Android program. The tool supports for exporting and importing data Outlook and Thunderbird CSV format. The result of this thesis is application which is compatible from Android version 2.1 and higher.
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Contact erosion of switchgear under real conditions
Holoubek, Josef ; Bušov, Bohuslav (referee) ; Valenta, Jiří (advisor)
This bachelor thesis is focused on the material loss - contacts erosion during switching process of the switchgears. First part is focused on the switchgears generally, their dividing and functions. Then there is closer look on the contacts of switchgears and what is necessary to be considered during their designing a operating. In this part there is also section devoted to the theory of the contacts erosion including the formulas for material loss calculation, which I found in existing literature. Practical part is focused on the contact system model and the measuring performed on this model. Measuring was also performed on the real switchgears for common use. There is also part devoted to this measuring. In the last part of thesis the analyze of the measured values is performed.
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Trees Have the Power
Mikušková, Nina ; Fajnor, Richard (referee) ; Kovářová, Marta (advisor)
The project "Trees Have The Power" is being developed since 2013 and revolves around the strength of interpersonal connections experienced throughout our lives. It points out the reality, that we all create our own micro-cosmos around us, shaped and expanded by every new person we meet. First phase of the project involved exhibition of a tree within a gallery, which served as a metaphor of an ever expanding organism. For the second phase an online social platform was developed, to map out and connect my personal contacts. The third outcome offers space to present the "tree". By involving people from my own personal tree of connections, we are creating lectures, interactive events, concerts, film screenings, and discussions focused on multiple aspects of life. The aim is both to test the skills and initiative of a specific community as a driving force in sharing and accumulating knowledge and experience; and at the same time to demonstrate the magnitude of impact of such activity. This unorthodox framework of encounter offers opportunity to generate new perspectives within the community, and enrich the audience.
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Advanced Synchronization of Contacts and Calendar with Google Services
Dohnal, Matěj ; Zelený, Jan (referee) ; Očenášek, Pavel (advisor)
The purpose of this barchelor’s thesis is to sum up the knowledge of personal data synchronization between a desktop application and the Google services. The main goal is to design and implement own application which would perform advanced synchronization of personal data. The design should be based on knowledge from the first step and also on deep analysis of existing solutions. Last part of the thesis describes testing of the implemented application and discussion of aproached goals and following development of the application.
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Preparation and evaluation of metallic contacts for crystalline
Frodl, Miroslav ; Jandová, Kristýna (referee) ; Hladík, Jiří (advisor)
This work deals with the advanced methods of contact’s fabrication for monocrystalline solar cells and the appropriate methods for the analysis of their properties with a focus on the study and realization the contact’s structures with low contact and sheet resistance fabricated by galvanic and electroless processes. In the first part of the work is discussed the theory of solar cells and buried contacts and in the second part of the work is an evaluation of practical realization.
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Calculation of electrodynamic forces in 1600 A circuit breaker
Musil, Pavel ; Bušov, Bohuslav (referee) ; Valenta, Jiří (advisor)
The thesis is focused on the calculation of electrodynamic forces that counterwork on moving contacts of compact circuit breaker BL1600 from the company OEZ Letohrad. The thesis is divided into separates chapters that build on themselves. In the introduction the reason why we deal with calculation of dynamic forces and structural arrangement of current carrying path is described. In the following chapter there is a theoretical analysis of electrodynamic forces that conterwork on individual parts of circuit breaker´s element. The third part is devoted to structural arrangement of the circuit breaker BL1600. In this part we can find an example of using the circuit broker Modeion in practice. Two next chaptures deal with adjustment of the model of current carrying path which then serves for the calculation of electrodynamic forces. The rest of the thesis is devoted to my own calculations. These calculations are mainly stationary where we try to find the forces that conterwork on the contacts in a steady current and in a point in time. There are also dynamics calculation when we can watch the forces that counterwork on contacts in a certain time interval. The last chapter is devoted to a stationary calculation of forces that counterwork on the electrical arc which arises while turning the short-circuit current off. The obtained results are evaluated in partial conclusions of this thesis.
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Analysis of project OHK Brno for business subject in region
Majer, Petr ; MBA, Libor Kejda, (referee) ; Mandelík, Petr (advisor)
This thesis seeks to analyze the impact of a range of projects of Chamber of Commerce Brno on the entrepreneurs from the respective region. The thesis describes the structure and the overall operation of the Chamber of Commerce Brno as well as its several projects. In order to evaluate, there are three marketing researches that need to be taken into a consideration. Those marketing researches had been realised during the period of 2005 – 2007. Baring the results risen from the abovementioned marketing researchs in mind, the created situation has been assessed, and based on the personal experience the recommendations dedicated to the management have been created.
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