|
Study of crack growing through an interface of two different materials based on analysis of crack profile in the vicinity of crack tip
Bareš, Pavel
Paper describes a numerical study of a crack penetrating the interface between two different elastic materials. The stability conditions of a crack terminating at the interface are formulated. The method introduces herein for these purposes is based on the assumption that the crack will start to propagate through the interface into the second material M2 when the shape of the crack face in the immediate vicinity of the crack tip will correspond to that in the same sample but made of purely homogeneous material M2. The numerical calculations are performed on the sample with surface protective layer under the small scale yielding conditions. The resulting critical stresses are compared with those obtained by other approaches. All results are in qualitative agreement. This method should be applicable in cases of larger crack-tip plastic deformations as well, where so far known methods are not able. All numerical calculations are performed by finite element method (system ANSYS).
|
|
Database system for e-shop
Lempera, Milan ; Holek, Radovan (referee) ; Macho, Tomáš (advisor)
This bachelor's thesis deals with design and implementation of database system and web interface for e-commerce. Web interface is divided into two parts. The first section is addressees for consumer. This part makes it possible to registration, order and follow history of orders. The second section is administrative milieu. The goods are possible replenish and edit and line him to divisions in this milieu. This milieu makes it possible work with orders. System is implemented in PHP5 language and built on databases MySQL 5.
|
|
Control system for filling and emtying of yoghurt tank in standard S88 based on automation elements SIMATIC family.
Hudousek, Tomáš ; Weber, Martin (referee) ; Pásek, Jan (advisor)
I made my thesis for APV Brno company. The thesis is divided into three parts. The first part concentrated on managing the work with the developmental environment SIMATIC S7 and mastering quite a large S88 norm of the company. The second part focused on the adjustment of the program module of the S88 norm for filling, stirrng and emptying of the yoghurt tank. The third part was to create a program for SCADA device, which is used for monitoring and controlling of the technology. From the point of view of utility in other applications a great importace for APV company was the creation of the graphic interface of the control module for SCADA device and to connect it to a new S88 norm.
|
|
Audio amplifier controlled by the IP protocol
Dvořák, Petr ; Schimmel, Jiří (referee) ; Kouřil, Jiří (advisor)
The bachelor thesis is intent on projection and realization of a device whitch is capable of communicate with a remote client through the Ethernet making use of the protocol set TCP/IP. This communication will be used for the control of analog and digital outputs of the device, which is able to be attached to any amplifier of audio signals. One of used protocols is UDP. This protocol is closely described, because it is used for transfer of data controlling outputs. The whole device is controlled by microprocessor ATmega32, which operates the communication with the ethernet interface through the controller ENC28j60, the communication with the D/A converters MCP4922 and controlling of digital outputs and a display. The device has its own IP and MAC address for identification in the network. It is possible to edit both addresses in the menu of the device with the help of the module LCD, the display of 2x16 characters with fours buttons. The audio amplifier staffed by the voltage controlled by the computing amplifiers SSM2018T is connected to this device. The amplifier is proposed as six-channel with symmetric inputs through the connectors XLR and unsymmetric outputs through the connectors CINCH. The operating programme which is able to be run on PC with the operating system Windows is necessary for the remote control of the device in the network and all functions of the device are controlled by this programme. This programme enables to control the device after setting the IP address of the destination device and the communication establishment. The motherboard is proposed as a universal module which keeps at disposal up to 6 analog outputs with the range of the control voltage 0 – 5 V and up to 21 binary inputs/outputs.
|
|
Several utilities for comfortable control of interactive graphical interface
Kolář, Petr
Standard MATLAB libraries do not include some tools for interactive figure processing, even if such functions are common in other graphical programs. Therefore we developed following graphical utilities: i, precise interactive selection of a figure area, ii repetition of a press-button function, iii movement of zoomed figure by slides and iv interactive graphical editor of cursor and button icons.
|
|
zlomekFS Over FUSE
Trmač, Miloslav ; Yaghob, Jakub (referee) ; Tůma, Petr (advisor)
ZlomekFS (ZFS) is a distributed file system, which allows working with files even if a computer is disconnected from the network. The changes performed while the network is not available are automatically synchronized after connecting the computer to the network. The original ZlomekFS implementation was using its own file system driver for the Linux operating system. This work replaces the driver with use of the FUSE interface, which was added to Linux only after the original ZlomekFS implementation was finished. To implement ZlomekFS using FUSE, the necessary kernel cache management operations have been added to the FUSE interface. These FUSE interface extensions were implemented for the Linux and FreeBSD operating systems.
|
| |
|
Creation of a User Interface of a Mobile Controller for Interactive Screens
Nová, Jana ; Novotný, Ota (advisor) ; Daněk, Lukáš (referee)
The aim of this thesis is to create a responsive front-end part of the mobile controller for applications on the interactive screens using modern frontend technologies. The theoretical chapters introduce to the readers the basic principles of accessibility and usability, including testing tools, which can be used for checking these principles. The aim of the practical part is to create a concise guide of front-end modern tools and technologies such as front-end frameworks, CSS preprocessors and tools for automating tasks on the front-end. In the practical part are these described tools and technologies used to create a mobile controller.
|
|
Design of Graphic Interface for Calculation of Differential Group Delay
Vohralík, Jan ; Křivánek, Vítězslav (referee) ; Kyselák, Martin (advisor)
The Bachelor's thesis is aimed to the problems regarding Polarization mode dispersion in optical fibre. Polarization mode disperzion limits the bandwidth of high speed comunication system. It cases a differential group delay between different polarizatins. If the delay is too high than the bits overlap and a bit error rate is increased. The work include description of polarization in Jones space and Stokem space. For description of Polarization mode disperzion is used PMD vector. I demonstrate influence of differential group delay in optical fibre at special grafic program develop in C# language.
|
|
ICT specialist recruiting methods, their support in business IS integrated with personal servers
Nechvátalová, Markéta ; Klas, Jan (advisor) ; Sonták, Miloš (referee)
The aim of the thesis is to analyze the current situation of the information system in the company and to find out its functionality in the area of human sources retrieval. The thesis is focused on the activities of personal officers who work with information systems. It describes the progressive processes of the recruitment of new employees from the first contact to the final contract completion. It suggests the communication interface with personal servers dealing with automating of personal officers' activities and making their work more effective. It uses modern analytical tools and software methods. The part of the processing is also time and financial estimate for creating the application.
|
guest ::
