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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
91

Zkušební stav pro testování únavy koloběžek / Scooter testing bench

Kostka, Marek January 2017 (has links)
This Master’s thesis deals with measuring of acting forces from rider to footbike during the ride, followed by the construction of test stand to draw an equivalent load. Measurements and subsequent analysis of acting forces from the rider to the footbike were made. These results were then used for complete design of the test stand. The frame of the test stand was subdued to a stress analysis. A complete automatic control system, including a pneumatic control circuit, was also designed. The proposed automatic test stand was then manufactured and put into operation.
92

Návrh stavu pro dlouhodobé testování pryžových segmentů / Test Rig Design for Durability Testing of the Rubber Segments

Borek, Vojtěch January 2019 (has links)
The aim of diploma thesis is construction design of test rig for durability testing of the rubber segments. The work contains a brief description of tested component, test rigs and individual parts of the testing system. Next chapter describes conception and construction solutions with justification of choice specific parts, supported by analysis of critical parts. Finally the overall construction design is evaluated and accompanied with a documentation of drawings, which is attached to the thesis.
93

Obloukový most přes údolí / Arch bridge across the valley

Velešík, Marek January 2020 (has links)
The main focus of this master thesis is the design and assessments of the bridge structure consist of a stress ribbon supported by a steel arch. Three preliminary studies of pedestrian bridges above the valley were created and the one with semi-through deck supported by arch through cables was chosen to detail processing. This thesis includes a chapter, which deals with finding the ideal shape of arch. The computational beam model for the analysis of the structure was created in software Ansys Mechanical including the construction stages. The correctness of the computational model was verified by the secondary model created in the software Midas Civil. For evaluation of the structure in crosswise direction was created slab model in software Midas Civil. The structure was evaluated considering the ultimate serviceability state and ultimate limit state according to currently valid standards. The thesis also includes dynamic analysis.
94

Obrábění rotačních součástí z kalených ocelí se zaměřením na stav povrchu / Machining of rotating parts of hardened steel focusing on the surface condition

Bukovský, Petr January 2015 (has links)
The thesis deals with machining of rotating parts made from hardened steel. The introductory chapter describes the problems of turning and grinding. The next chapter deals with heat treatment and machined materials. The next lists the used cutting materials. Criteria for evaluating the quality of the surface. A selection of cutting materials for the machining of hardened steels from selected manufacturers. The final chapter is a comparison of the described technologies.
95

Hodnocení technického stavu osobních vozidel / Evaluation of technical condition of vehicles

Košťál, Ondřej January 2015 (has links)
Diploma thesis will be addressed about issue of vehicle inspection at Inspection stations in Czech republic and neighboring countries. Thesis will be concentrate about legislation, metodics, evaluation of technical condition and influence of dangerous faults to vehicle operation. One part of thesis will be proposal of provision to increase safety in vehicle tradic.
96

Studie sanace vybrané stokové sítě / The study of selected rehabilitation of sewer network

Lžičař, Jakub January 2016 (has links)
The diploma thesis deals with sewage systems, evaluation of their technical conditions and various methods of sewage system reconstruction. First chapters provide theoretical background for sewage system reconstruction and contains general information about sewage systems and basic terminology. Next chapters describe the theoretical procedure of elaboration of proposal of existing sewage system remediation including the evaluation of technical conditions of sewage system and the evaluation of individual technical indicators. Then, individual methods of sewage system reconstruction are described. The second part of diploma thesis deals with the case study of sewage system in the village of Mikulovice. The case study is elaborated according to procedure specified in the theoretical part of diploma thesis. The case study includes the passportisation of sewage system and the evaluation of technical conditions of three selected sections. On the grounds of discovered defects, the methods of sewage system reconstruction are designed. Finally, each section of sewage system is evaluated and optimal method for its reconstruction is selected.
97

Rozšiřování konce trubky za statických a dynamických podmínek / Flaring the End of a Tube Under Static and Dynamic Conditions

Šrefl, Martin January 2016 (has links)
The thesis is focused on expanding the ends of the tubes made of 1.4031 material into a cone shape for quasi-static and dynamic conditions. The aim of the research is the analysis of stress-strain condition in the area formed under the process conditions. As a technology test for expanding tubes is used a method of pushing the tube at a stationary mandrel and deformation measurement was done by 3D optical system ARAMIS. In the thesis is described in detail an experiment carried out under quasi-static conditions, the results of which yielded interesting findings. In the framework of the present study were designed and detailed engineering design and production tools designed for experimental realization of technological tests for quasi-static and dynamic conditions. Exploration in terms of the behavior of tube under dynamic conditions forming in this thesis is carried out in phase functional verification tools. The analysis of the forming process is planned in the framework of the next thesis.
98

Studie obnovy vybrané stokové sítě / The study of rehabilitation of the selected sewer network

Cagášek, Radim January 2017 (has links)
This work deals with the evaluation of the technological state of the sewerage network, as well as the subsequent method of remediation for each failure. The first part contains the accompanying report. This report includes information on the municipality in which the evaluation of the technical condition of the sewerage network took place. Next section includes the actual technical report which has data on the sewage network and its inspection. There are also information about the evaluation of the network‘s technical condition and viable ways of its rehabilitation. At the end of the section there are suggested possible ways of remediation for each of the detected failures. In the next chapter there are calculations for construction technical indicators and the calculation of the capacity of the sewerage network. The last section contains technical data sheet listing the faults of the individual sections and geodetic focus on manholes.
99

Nutriční stav pacientů hospitalizovaných pro syndrom diabetické nohy - retrospektivní analýza / Nutritional status of patients hospitalized for diabetic foot syndrome - retrospective analysis

Horáková, Markéta January 2020 (has links)
Diabetic foot syndrome is a serious chronic complication of diabetes mellitus, caused by a number of factors such as neuropathy, angiopathy, infection, and above all, this syndrome is consequence of a poor diabetes compensation and cardiovascular risk factors. It is characterized by particularly impaired wound healing and a higher tendency to chronicity, which can often be a reason for disability of the patient. Nutrition plays a very important role in a patient hospitalized with diabetic foot syndrome, as adequate coverage of energy and nutritional needs is essential for successful treatment and healing of ulcers. The theoretical part of this diploma thesis first mentions diabetes mellitus, its basic characteristics and briefly describes the types of diabetes that are associated with diabetic foot syndrome. Acute and chronic complications of diabetes are also discussed, followed by a more extensive chapter on the diabetic foot syndrome itself. This is the very definition of the term, epidemiology, pathogenesis, classification, diagnosis, treatment and prevention of this syndrome. The last chapter deals briefly with general nutritional recommendations for diabetics and the nutritional status of patients in which they are most often found when they are admitted to hospital, which is malnutrition,...
100

Využití isogenních linií barevné pšenice v pokusech s laboratorními potkany

Hadincová, Tereza January 2018 (has links)
A feed test was carried out on male “Vistar” rats. Four groups of rats, feed with mixtures with 70 % of wheat, differing in grain colour, were compared. For feed trials, near-isogenic lines of derived or recipient varieties of “Novosibirskaya 67” (N67) were selected. These were the N67 grains with white grains, “ANK-28A” with purple grains (Pp1 and Pp2 genes), “ANK-28B” (Pp1 and Pp3) and “Aoi Yu” (unfinished near-isogenic line) with blue aleurone (Ba1 gene). Feed mixtures were standardized to the same nutrient content. The feed trial lasted 72 days. Time increments and biochemical parameters of the blood were evaluated. Statistical differences in glucose (GLU), triglycerol (TG) and total protein (CB) levels were noted in biochemical parameters, with a higher GLU content in N67 and “Aoi Yu”. Higher TG content was recorded in “ANK-28B” and lower in “ANK-28A”. The higher CB content in rat blood was recorded in “Aoi Yu” and lower for all remaining wheat. No statistically significant differences were found in other biochemical parameters of blood (P<0.05). Interestingly, a higher feed consumption per pound was observed in the wheat mix with white grain (N67) and the lowest in “Aoi Yu” with the highest content of anthocyanins. This result is in line with the results of some other authors who have shown a relation between the high anthocyanin content in the feed and the reduced weight additions of laboratory animals.

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