National Repository of Grey Literature 54 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Systém nakládání s komunálním odpadem na území vybraných obcí mikroregionu Hornolidečsko
Vaculíková, Simona
This bachelor's thesis deals with the issue of waste management in selected municipalities of the Hornolidečsko microregion. The work is divided into two main parts. The first part pays attention to the theory related to the issue, including history, the most common ways of waste management and legislation. The second part contains the characteristics of natural and socio-economic conditions, including the development of the state of municipal waste management in the monitored period. At the end of the thesis, proposals and recommendations leading to long-term sustainable waste management are established. In particular, recommendations relating to the minimalization of the production of mixed municipal waste.
Comparison of joints for plastic parts
Matzke, Patrik ; Benč, Marek (referee) ; Harant, Martin (advisor)
The bachelor thesis deals with technologies for joining plastic parts in the field of headlight construction. The aim is to focus on and compare staking and self-tapping screw technologies for the application of joining optical parts made of plastic with printed circuit boards containing LEDs. In addition, to provide a comprehensive overview of these technologies and to make a comparison from a technical and economic point of view. In the practical part, a comparison of these technologies in terms of strength is made, for which a tensile test was used. From an economic point of view, the requirement is to propose a preliminary economic calculation, used for design proposals depending on the number of pieces produced, which is applied to a specific example.
Zapojení podniků v ČR do evropského podnikání v rámci bioekonomiky
SAGAPOVA, Nikola
The dissertation deals with the mapping of the potential for the involvement of enterprises in the Czech Republic in European bioeconomy, specifically in the bioplastics sector, which is currently a dynamically developing industry. The focus is on the factors and contexts that influence the possibility of entering this sector, which arise from the internal and external conditions of firms. The research relies on a combination of methods and provides both quantitative and qualitative approaches. The methods used include literature search, scientometric analysis, neural networks, correlation analysis, market situation analysis, mapping, case studies and questionnaire surveys. Through these methods, the thesis provides a comprehensive picture and broader context of the current situation of the bioplastics industry.
Comparison of plastic products in terms of differences in manual production and 3D technologies
NĚMEC, Michael
This bachelor thesis deals with the comparison of plastic products in terms of differences in manual production and 3D technologies. The theoretical part deals with the general characteristics of plastics, occupational safety and methods of manual processing of plastics. In conclusion, the technologies of 3D modeling and 3D printing are described. The practical part includes the selection of products suitable for production using both technologies. The products were subsequently manufactured, the process of their production was recorded and in the end both their procedures and the resulting appearance were compared.
Disposable plastic products on the Czech market
VRBA, David
The bachelor thesis deals with the issue of disposable plastic products. The first part deals with the consumption, negatives and positives of plastics. It also describes the handling of plastic waste and the content of the new Directive (EU) 2019/904 of the European Parliament and of the Council on the reduction of the impact of certain plastic products on the environment. The questionnaire survey is used to evaluate the consumption of disposable plastic products on the Czech market.
The effect of manufacturing inaccuracies on the final light intensity distribution of an automotive headlamp
Březnová, Tereza ; Lysa, Bohuslav (referee) ; Novotný, Jan (advisor)
The thesis deals with the issue of headlamp defects arising during production and their impact on the resulting light trail. The thesis describes and analyses defects arising during individual correction loops. Their analysis was carried out in order to provide measures for other projects. The main defects that have been assessed include the position of the light source, the quality of the optical surfaces and the associated quality of the plating, inaccuracies of the optical surfaces, dimensional variations due to installation technology and defects on the cover glass. The proposed measures concern the pressing tool, accuracy of machining and surface polishing. The thesis also includes designing solutions for quick identification of the surface quality of the cover glass by remote projection. Individual defects were described by their originators, their seriousness and their reparability. Based on this information, recommendations for production are proposed.
Evaluation of dimensional and shape accuracy of components made of plastic
Tuza, Marek ; Dobrocký, David (referee) ; Sedlák, Josef (advisor)
The aim of this thesis is to evaluate the dimensional and shape accuracy of components made of plastic. A total of 10 samples, produced by two types of production, extrusion and 3D printing using the FFF method, were used for this purpose. The semi-finished products were milled after production, which resulted in samples of the required dimensions. The samples were milled on one side without cooling emulsion and on the other side with cooling emulsion, which significantly affected the resulting shape accuracy values. Thus, a total of 20 surfaces were evaluated. Two parameters were selected to evaluate the dimensions, namely distance and parallelism. When measuring the shapes, 11 parameters were evaluated using a 2D roughness profile and a 3D surface texture. One of the most used parameters that was evaluated when measuring shapes was the arithmetic mean deviation of the roughness profile, which is denoted as Ra. The research found that the highest accuracies were measured for the material PA produced by 3D printing and milled with a cooling emulsion. At the end of the practical part, the author also makes recommendations regarding the practical use of materials.
Assessment of three types of heat exchangers
Hlavinková, Valérie ; Toman, Filip (referee) ; Baláš, Marek (advisor)
The aim of this thesis is to assess selected three types of heat exchangers designed for emergency cooling. The theoretical part of this thesis consists of a research containing an overview of exchangers. It includes a description of the construction of exchangers, characte-ristics in terms of heat transfer and an indication of the areas of its use. The practical part deals with the thermal and hydraulic design of two tube heat exchangers and a plate heat exchanger. Finally, the evaluation of the designed exchangers is performed.
Do you know what a fish will do when it runs up a hill?
Elznic, Zita ; Štroblová, Kateřina (referee) ; Rathouský, Luděk (advisor)
Diploma thesis entitled Do you know what a fish will do when it runs up a hill? concerns the topic of industrial fishing. Formally, it is an installation that contains two parts. The first part is an oval object on which are attached mechanical fish, which form a moving flock. Using engines, they interact with each other and the viewer accompanied by the song. The second part includes three separate mechanical fish, which create a direct dialogue with the viewer. The installation is located in a white cube. The result is to give the impression that the fish are alive and, with the help of a human voice, get closer to the viewer. Title Do you know what a fish does when it runs up a hill? based on a child's joke. This sentence is characteristic of the topic, in that it is all nonsense. The fish do not run, do not move on land and do not even talk. An attempt at this joke to humanize fish is quickly over when you know the answer. Just clapping tells us how foreign this different world is.

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