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Web Service for Pronunciation Training and Foreign Language Learning
Stehlík, Ján ; Bambušek, David (referee) ; Szőke, Igor (advisor)
This article presents a design and an implementation of Web application for English pronunciation training. Nowadays, there are a lot of on-line applications that help to improve English level or skill level of any other foreign language. On the other hand, there are not so many applications that help to improve pronunciation of given language. This project was developed to fill the gap, and to enable users to practice pronunciation by repeating short video segments. Using their microphone device users will record their speech. This speech will be compared with the reference recording. Result of this comparison will be returned to the user as a similarity score. The similarity score is computed using Dynamic Time Warping algorithm, that is incorporated inside a video player used in this application.
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Electronic detector for thin-film gas microsensors
Rozštípil, Jakub ; Stehlík, Jiří (referee) ; Hubálek, Jaromír (advisor)
The general aim of Master’s thesis is to design and execute electronics in the SMT device view for thin film gas sensors and to study principle of gas sensor functionality based on semiconducting oxides. The SMT device contains temperature controller and electronics which is able to scan the concentration of gas on the sensor surface. It is designed for controlling of four sensors and has to communicate with computer for setting of initial conditions and scanning of concentration of gas. The practical part of Master’s thesis contains design and construction of electronics and software making.
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Programmable I/O control module for driving electrical machines
Jež, Roman ; Šandera, Josef (referee) ; Stehlík, Jiří (advisor)
This work deals with design and realization device intended for control of procesess in automation. The general aim is design and development of device containing digital inputs, digital outputs, analog outputs, LCD display and keyboard communicating with standard elements in automation. This device use serial line RS232 for communication with aplication executed in program Control Web 2000.
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CFA application
Mikláš, Jan ; Havlíček, Tomáš (referee) ; Stehlík, Jiří (advisor)
The project is aimed at detailed analyse characteristics of (CFA – Current Feedback Amplifier) and realize an fitting aplication to demonstrate accomplishments as compared with voltage feedback amplifier (VFA).
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Design of manufacturing technology for door elastomer grommet
Kavan, David ; Stehlík, Ing. Jaroslav (referee) ; Kandus, Bohumil (advisor)
The goal of this project is design of manufacturing technology for door elastomer grommet in a series of 400 000 units per year. As a proposed solution of manufacturing technology has been chosen multicomponent injection moulding. Appropriate thermoplastic elastomer and polyamide was chosen based on the knowledge gained in theoretical study of materials and technologies elaborated in the second part of the project. Moreover, the shape of the door grommnet was redesigned in accordance with the chosen technology. Working machine was chosen from manufacturer Arburg, model Allrounder 630S in a two-shot design, complemented by the index unit. A cost of production of one piece of the door grommet was determined in an economic evaluation. This cost was compared with current cost of production and new technology reducing manufacturing costs of one series by 25%.
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VFA and CFA comparison
Vystrčil, Marek ; Hubálek, Jaromír (referee) ; Stehlík, Jiří (advisor)
This bachelor's thesis is focused on comparison of operational amplifiers structures with voltage (VFA) and current (CFA) feedback. In the theoretical part there is an analysis properties of operational amplifiers. Attention is paid to advantages of particular amplifiers in concrete networks. The practical part contains the simulations of those networks with an aim to assess characteristic properties and a difference between applied circuits. I used the operational amplifier µA741 for the simulation of the structure VFA. I used the amplifier AD8011 for the simulation with current feedback. I added the theoretical and practical differences between comparative structures.
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Technological phase gross superstructure assembled house
Stehlík, Jakub ; Štěrba, Martin (referee) ; Henková, Svatava (advisor)
Subject of this bachelor´s thesis is the upper gross production technology of family house in Bílovice nad Svitavou. This work contain technical reports, site family house, device of construction site, technological provisions, overal results, timetable, machine set design, monitoring and test plan, occupational safety.
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Program for checking and verifying of PDF document's content
Sohr, Martin ; Stehlík, Jiří (referee) ; Kadlec, Jaroslav (advisor)
Program runs through the text of pdf file and locates informations about text and about charakteristics of checked file based on set arguments. Program is able to load mentioned informations about author, title, content, key words and the name of program where was the file created from matadat file. Program is able to find out numbers of symbols, words, pages out of content of file and is also capable of searching for required text from the content of file. It’s possible to use star or interrogation convention for searching. Program is able to check several files in one start.
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Internet application to show data from the wireless temperature measuring system
Procházka, Stanislav ; Stehlík, Jiří (referee) ; Kuchta, Radek (advisor)
Within this bachelor work the design of the Internet applications was created. It can be used for administration, archiving as well as presentation of data acquired from the coordinator of the temperature sensor network. The system is based on temperature measurement and it consists of the temperature sensor network, coordinator of sensor network and the Internet applications. The coordinator of sensor network collects data from wireless sensors and delivers them to the computer unit. Subsequently the Internet applications evaluate these data.
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Methods of frequency stabilization of semicondutor lasers
Kozelský, Adam ; Stehlík, Jiří (referee) ; Mikel, Břetislav (advisor)
The main aim of the thesis is a frequency stabilization of the DFB semiconductor laser diodes. The temperature stability of the laser diode chip, the stability and the noise of the injection current and the backward reflections are the crucial parameters which affects the frequency stability. These influences are described and the resolution is proposed. The theory of the external methods of the frequency stabilization and the comparison of these methods is presented. One method was choosed and this method was realized for 760 and 1540 nm wavelength laser diodes. In this method was used the frequency stabilization based on the linear absorption to the spectral lines of the gases. The diploma work is closed by the measured results of the frequency stability of the used laser diodes and by the comparison of level of stability achieved by the other methods.
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