The system of tracking the position of the bucket excavator's wheel for prevention of risk situations

For companies doing business in mining mineral deposits, ensuring safe work is one of the key tasks (Safety First!). One of the important trends in this area is prevention and endeavour to forestall risk situations. Risks need to be searched, technically described, spatially defined, evaluated and categorized by degree of risk. Complex geological and stability conditions can be one of the sources of persistent and significant risks, which are mainly landslides and rockslides threatening both mining equipment and employees. The problem described in this article and its solution concerns the Most Basin (formerly the North Bohemian Lignite Basin). This is a tertiary basin that was founded in the Oligocene. The main mineral is lignite and mining takes place on the surface. The main excavating machinery in the surface lignite quarries in Europe (Czech Republic, Germany, Poland) is the bucket wheel excavator.Web of Science15328727

Measurements of velocity in the channel bottom boundary layer, using Particle Image Velocimetry

Téma této práce navazuje na zkoumání metody rychlostního pole, které je v dnešní době již relativně běžnou metodou pro stanovení průtokových veličin na vysoké úrovni. Práce se zabývá především rychlostí v mezní vrstvě u dna a její závislostí na různých faktorech. Mezní vrstva pro svůj malý rozsah tvoří pouze malou část z vyhodnocované oblasti, a proto vyjádření její rychlosti často spoléhá na extrapolační metody. Roste-li však požadavek na větší přesnost celkového měření stává se tato oblast také nezanedbatelnou. Práce shrnuje základní teorii rychlostního pole, ale především se zabývá teoriemi závislosti místní rychlosti na její poloze od dna a její deformaci v mezní vrstvě. Cílem práce je popsání teorií pro rychlostní pole a jejich porovnání se skutečným stavem měřeným na kanálu v laboratoři ÚVS-LVV. Základním podkladem skutečného stavu rychlostního pole v dnové mezní vrstvě je přesné měření metodou Laserové rovinné anemometrie. Výsledky měření budou sloužit ke konfrontaci běžně používaných teorií a jiných postupů pro stanovení rychlosti u dna. Výstupy práce nabízí na základě výsledků srovnání, potvrzení či upřesnění platnosti používaných vzorců. U některých je navrženo omezení jejich platnosti nebo jsou upřesněny koeficienty či alternativní způsob jejich určení.The theme of this thesis is continue on examining relatively commonly used measurement flow field metods, which assessing the variables flows at a high level. Thesis follow up mainly the flow field in the channel bottom boundary-layer and its depending on different factors. To calculate velocity in boundary-layer is common used extrapolation method, because this boundary layer is only the small part of measuring cross section. Increase the accuracy of measurement of flow variables make the flow in the boundary layer also important. Thesis is a summary of a basic theory of flow field, but mainly is about dependent local flow velocity on position, and about deformation of flow field in boundary layer. The aim thesis is description different calculation methods of flow flow field in boundary layer and comparison to with real condition which was measured in laboratory UVS-LVV. Real condition flow field in channel bottom boundary layer is based on exact method Particle image velocimetry. The measurement results serve to compare commonly used calculation methods or different theories velocity in the channel bottom boundary layer. Outputs this thesis offers comparison, confirmation or specification calculation methods according to the results. It has been suggested several limitations on certain methods of calculation, or coefficient were modified or alternative has been proposed to calculate them.

INVESTIGATION OF THE CHEMICAL COMPOSITION AND EFFICIENCY OF SEED OIL OF SPINDLE TREE (EUONYMUS EUROPAEA L.) ON THE MODEL OF NON-ALLERGIC DERMATITIS

The aim of the research was to study the chemical composition and effectiveness of the seed oil of Spindle tree (Euonymus europaea L.) on the non-allergic contact dermatitis model. The oil was obtained by the extraction by petroleum ether from the seeds. The analysis of fatty acids and determination of their quantitative content was carried out using gas chromatography. Determination of carotenoids and tocopherols content in fatty oils was carried out after chromatography on a silica gel column. Investigation of anti-inflammatory action of the Spindle tree seed oil on white rats was carried. Determination of biochemical parameters of blood plasma was performed on the semi-automatic biochemical analyzer BS3000M (Poland). The yield of oil was 20–28 % of the weight of the seeds. Nine fatty acids were identified in the oil by the gas chromatography, among which 4 are unsaturated (oleic, palmitoleic, linoleic and linolenic), which together make up 87.79 % of all fatty acids from this oil. Spindle tree oil contains 26±5 mg – % carotenoids and 40±5 mg – % tocopherols, which were separated by chromatography on a silica gel column. There were no symptoms of intoxication with the introduction of Spindle tree oil in the stomach of rats and it can be classified in the 4 the grade of danger in accordance with GOST 12.1.005-88. The anti-inflammatory activity of Spindle tree oil in comparison with the oil of Sea buckthorn on the model of non-allergic contact dermatitis was weaker, but sufficient to recommend it for the treatment of skin diseases in ointments

Creating 3D Printer Assembly Process and its Introduction into Education

Import 23/07/2015Bakalářská práce se zabývá vytvořením montážního postupu pro sestavení 3D tiskárny. V úvodní části je vysvětlen pojem aditivní technologie a následně jsou rozepsány jednotlivé metody této technologie, kde u každé je rozepsán princip, na jakém fungují. V další části je uveden podrobný montážní postup konkrétní 3D tiskárny společně s návrhem využití ve výuce.Bachelor thesis is dealing with designing 3D printer assembly process. In the introductory part the term additive technology is explained and subsequently each method of this technology is described in detail, including the description of the principle which it is based on. In the following part there is the particular 3D printer assembly process introduced thoroughly simultaneously with its introduction into education.346 - Katedra obrábění, montáže a strojírenské metrologievýborn

Replacement of the Stacking Unit of Stamping Line Used for Cutting Stacking

Import 23/08/2017Diplomová práce se zabývá vyhodnocením stávajícího stavu stohovacího zařízení ocelových přístřihů nástřihové linky. V úvodní, tedy teoretické části, je popsán princip výroby ocelových kol, funkce nástřihové linky a stohovacího zařízení společně s výhodami a nevýhodami současného zařízení. V další části diplomové práce jsou rozepsány možné varianty dalšího postupu řešení společně s výsledným řešením. Cílem této diplomové práce je navrhnout plně funkční úsek nástřihové linky, který bude jednoduchý pro následnou údržbu a také v co největší míře standardizovaný vůči ostatním úsekům linek v rámci společnosti.This master thesis is focused on evaluating of the current conditions of stacking units of stamping line used for a cutting stacking. In the introductory, the theoretical part, the principle of steel wheels production, the function of a stamping line and stacking device together with advantages and disadvantages of the current equipment are described. In the next part of this master thesis possible alternatives of the further solution together with the final solution are described. The aim of this thesis is to propose a fully functional section of a stamping line which will be easy for subsequent maintenance and also will correlate as much as possible with the standards of other sections of the lines within the company345 - Katedra mechanické technologiedobř

Simulační techniky oftalmopedické

Title in English: Simulation techniques – Education of people with visual impairments This handbook creates support for students of the course Simulation techniques – Education of people with visual impairments. This text is divided into three logical, interconnected parts. In the first part, students are acquainted with the topic of the influence of functional vision on the pupil's work in the classroom. The second part deals with the problems of spatial orientation, independent movement and removing barriers. The third part contains practical exercises in which students will try the specifics of working with pupils with visual impairments at school. The aim of the text is to support positive attitudes towards pupils with visual impairments

Logbook for Special Edication doctoral program

The LOGBOOK of academic activities is an overview of fulfilled requirements for the course and completion of studies specified in the internal regulations of the faculty, accreditation materials of the study program and the catalog of courses. The logbook of academic activities is a students' document on the activities completed during their studies, which are part of the competencies of the graduates of the doctoral study program Special Education. The logbook functions as a control and feedback tool for students and supervisors regarding their completed activities

Desenvolvimento da química fundamental do molibdenio na modelagem biomimética funcional de molibdoenzimas

Orientador : Fabio Souza NunesCo-orientadora : Shirley NakagakiDissertação (mestrado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Pós-Graduação em Química. Defesa: Curitiba, 2007Inclui bibliografi