|
|
Evaluation of sample geometry effect on creep deformation progress using acoustic emission method
Dvořák, Jiří ; Sklenička, Václav ; Král, Petr ; Kvapilová, Marie ; Svobodová, M. ; Šifner, J. ; Koula, V.
This work deals with the determination of the influence of the sample geometry on the development of failure during creep exposure. Creep tests were carried out at temperature of 600 °C and a stress of 180 MPa in the protective atmosphere of argon. P92 steel samples with a conventional smooth surface and samples with a V-groove notch were chosen for the test tests. The results of creep resistance and fracture behaviour were complemented by detailed microstructural characterization to assess damage initiation and development. Based on the measured results, the creep data was evaluated using neural networks that systematically search for and process the signal from the acoustic emission (AE). Acoustic emission serves here as an effective non-destructive method for early prediction of the beginning of a possible accident of components of power and chemical plants.
|
|
| |
|
|
Repeated GPS measurements at Tetčice polygon and its interpretation
Dvořák, Jiří ; Josef, Weigel (referee) ; Pospíšil, Lubomil (advisor)
This thesis deals with monitoring shifts in the vicinity of the village Tetčice. The site is located at the interface of geomorphological units. Monitor the area is done in stages and methods of using GPS and precise leveling. Points tested are expected movements in places the earth's crust, which are stabilized on the pillars in order to avoid possible negative effects. The work builds on results from previous measurements.
|
|
|
Meteo weather station
Dvořák, Jiří ; Fajmon, Petr (referee) ; Fedra, Zbyněk (advisor)
The aim of this master‘s thesis is design and construction of home meteo weather station, the choice of applicable temperature, humidity and pressure sensors and characterization of workable device of station. The core of the station is microcontroller ATmega8 used for process data from sensors. Evaluative criteria for choice of sensors will be comunicate interface, accuracy, operating range, current drain and other aspects. Outer transmittin unit measure air temperature and relative humidity. These data are trasmitted by wireless radio module to interior receiving unit, that measure interior temperature and atmospherical pressure and represent measured data to LCD display including dew point. The data are transmitting to the internet and storing in the database. Measured values are available on the web page where you can display the graphs of last measured values.
|
|
|
Model for E-HR Practice
Červená, Renata ; Polanský, Tomáš (referee) ; Dvořák, Jiří (advisor)
The content of this Master thesis is the Analysis of human resource management mainly its foundation. Part of the analysis is also the utilization of Intranet and Internet technologies during the personal processes. The basis is the description of the principles of operating, importance and the ways of application in the human resource management with the aim on current concept of personal work as human resources. Further then also the e-HRM itself with its aim to enable reaching the qualitative change in the personal management based on the utilization of the real possibilities of IT and communication technologies. The purpose of this thesis is also to analyse these processes and thus explain its efficiency and advantages.
|
|
| |
|
| |
|
| |
|
|
E-commerce and strategy e-business
Musilová, Veronika ; Dvořák,, Jiří (referee) ; Dvořák, Jiří (advisor)
I will attend to concept of useful strategy for e-commerce in my bacholer´s thesis wchich will be useful for production companies. The objective is to joint customers requirements with possibilities which are offered by production companies. Intermediary will be already alluded e-commerce. I will inform about customers satisfaction with e-commerce. I will target the trend which is development of internet population proceed, which make up target group of e-shops potential customers. I will make some analyse, which are necessary for proposition of mere strategy in practical part of my bacholer´s thesis. I will attend to aims which copany should achieve, technology which should by available and possibilities , which should be valorize.
|
|
|
The model of direct payments in the internet business
Svobodová, Kateřina ; Dvořák,, Jiří (referee) ; Dvořák, Jiří (advisor)
Diploma thesis is sighting to function direkt payments in electronic scene. Diploma thesis is determining model, which helping with direct payments in the internet business. The aim of diploma thesis is proposal model, which will have better conditions for direkt payments in e-shop. It was better for all companies, which use direct payments in their electronic business. Product of this thesis is abstractedly model, which is applicable for all internet business.
|
guest ::
