|
|
Construction design hydraulic press brake
Stránský, Jaroslav ; Holub, Michal (referee) ; Pavlík, Jan (advisor)
This thesis is divided into several chapters. First two chapters after introduction are written as search type. In next part I devoted to detailed design of functional mechanisms of linearly moving parts of press brake. For the construction of stop mechanism I dealt with conversion types as ball screw, pinion with rack and timing belts. There is also quite thorough calculation part in ball screw and pinion with rack issue. I have also dealt with the necessary bending force and then designed hydraulic cylinders. Elaboration of machine frame with safety features is included.
|
|
|
Studying the effect of the gap on the properties of laser butt welds
Holub, Matyáš ; Kubíček, Jaroslav (referee) ; Mrňa, Libor (advisor)
This thesis studies the impact of gaps on the properties of laser butt weld performed. For experiment was chosen DC01 ordinary steel and stainless steel X5CrNi18-10 (1.4301) with different thicknesses. The welding parameters depending on the gap between the welded plates remain constant. In the experimental part of the samples were welded using the Yb:YAG laser and compared to the tensile test, macrostructure, microstructure and Vickers hardness. At the end of the thesis are drawn experimental results.
|
|
|
Influence of fluxes on weld metal properties
Holub, Kamil ; Sigmund, Marian (referee) ; Kubíček, Jaroslav (advisor)
This thesis deals with the topic of submerged arc welding – an electric arc method of fusion welding, that uses a layer of granulated flux to shield the weld pool from atmospheric gases. Theoretical part is devoted to the description of the welding method and fluxes currently used. The practical part contains an experiment, which consists of making two weld deposits on structural steel S235JR by using different fluxes. First weld deposit is made with OK 10.62 Flux. The same flux alloyed with the Tribaloy T-800 laser cladding powder is used for the second weld deposit. Test specimens are examined on the basis of influence of fluxes combined with a single electrode wire.
|
|
|
Control of special purpose machine tool
Plocek, Jaroslav ; Holub, Michal (referee) ; Houška, Pavel (advisor)
The master thesis treats the design of control system of special purpose machine tool. The first part analyzes and compares two possible variants of control system which use either a CNC control system Sinumerik or motion control system Simotion. Only the variant with the Simotion control system is subsequently examined in detail: its hardware configuration, the selection of components and partly also the software solution. The thesis further deals with the safety of the realized control system and of the whole machine. There are described general safety requirements of machinery based on harmonized European standards and their specific application in the design of safety functions and the safety circuits of solved machine tool.
|
|
|
Application for Monitoring System Resources of OS Windows
Holub, Ondřej ; Rozman, Jaroslav (referee) ; Grulich, Lukáš (advisor)
This bachelor's thesis deals with the monitoring principles of the system devices in the environment of the Microsoft Windows Operating System. The emphasis is placed on the system services and functions which are utilizable for the system resources monitoring. Some aspects related to their functioning are discussed and specified. The implementation part is represented by an application for the system monitoring based on these services and functions. The evaluation of the work and a possible extension is mentioned in the conclusion.
|
|
| |
|
|
Creating Panoramic Images from Photographs Acquired with Different Camera Settings
Fibichr, Jaroslav ; Sedlář, Jiří (advisor) ; Holub, Viliam (referee)
When taking pictures for the purpose of creating panoramic images, it is more convenient to adjust camera settings for each image separately to keep the convenient brightness distribution. It usually leads to a set of images with differences in brightness must be corrected before stitching. The goal of this thesis is to propose solutions to adjust these differences and implement them in the application Panomedic. The first method is based on direct brightness level mapping in overlapping area of the images. The second method utilizes statistical values obtained from image brightness distribution. The method for searching the seam of stitching is also described. The resulting panorama image is without visible transitions between the input images.
|
|
| |
|
|
Role of alarmins in perioperative medicine.
Máca, Jan ; Holub, Michal (advisor) ; Závada, Josef (referee) ; Veselý, Jaroslav (referee)
Introduction: Inflammatory response (IR) is a fundamental reaction to the cell and tissue injury. It is aimed at correcting the pathologic condition and maintaining the structural and functional integrity of the organism. The insult with too extensive or prolonged effect can lead to dysregulation of IR to the systemic level. Major abdominal surgery (MAS) can be considered as a potentially significant insult. Alarmins are endogenous, intracellular proteins that are passively or actively released upon the cell injury to extracellular space where they express their bioactive effect. Alarmins has therefore potential reflect the degree of surgical injury. Purpose: The main goal of the study was elucidating the role of selected alarmins in inflammatory response after MAS. The secondary aims were: 1) determining the relationship between alarmins and outcome prediction, 2) to determine relationship of alarmins and place of surgical intervention, 3) to determine correlation between alarmins and some of the surgery characteristics, e.g. length of surgery, blood loss, and intraoperative fluid load, 4) compare injury caused by laparoscopy and open surgery reflected by alarmins, and 5) to confirm previous results by determining the role of alarmins in surgical injury in subgroup of patients undergoing colorectal...
|
|
|
Influence of fluxes on weld metal properties
Holub, Kamil ; Sigmund, Marian (referee) ; Kubíček, Jaroslav (advisor)
This thesis deals with the topic of submerged arc welding – an electric arc method of fusion welding, that uses a layer of granulated flux to shield the weld pool from atmospheric gases. Theoretical part is devoted to the description of the welding method and fluxes currently used. The practical part contains an experiment, which consists of making two weld deposits on structural steel S235JR by using different fluxes. First weld deposit is made with OK 10.62 Flux. The same flux alloyed with the Tribaloy T-800 laser cladding powder is used for the second weld deposit. Test specimens are examined on the basis of influence of fluxes combined with a single electrode wire.
|
guest ::
RSS feed.