National Repository of Grey Literature 4 records found  Search took 0.00 seconds. 
The methodology of preservation and presentation of multimedia data
Získal, Bohuš ; Bohuš Získal ; Cubr, Ladislav ; Berka, Roman ; Svatoňová, Kateřina
This methodology was created within the implementation of the project "Laterna magika. History and Present, Documentation, Preservation and Accessibility ”DG16P02H005 funded by the Program to Support Applied Research and Experimental Development of National and Cultural Identity for the years 2016 to 2022 (NAKI II). The methodology is based on the need to describe the procedures for the description, storage and presentation of digital information objects created during the processing of documentation of historical performances of Laterna magika and to define these procedures in such a way that they are applicable to other works of a similar nature. The methodology responds to a situation where at the national level, and for some specifics of the content or at the global level, there are no defined standards of care for this type of cultural heritage, which would cover all the necessary activities. The above-mentioned specifics include the form of a live performance using technologies and elements, which significantly contribute to the informational and aesthetic form of the work, and the combination of which as a whole is difficult to document. The methodology is intended for memory institutions, their partner organizations or suppliers who participate in the creation, processing, presentation and storage of data generated during the digitization, reconstruction and description of documentation of multimedia performances. Best practices and data structures take into account the situation where physical (data) objects related to works are in the collections of different institutions or individuals, and it is not possible or desirable to collect all physical objects under one common administration. The methodology was verified by the researchers of the project for the Národní filmový archiv, Prague, CESNET and the Institute of Intermedia at CTU FEE on selected data created for the presentation and preservation of historical performances of Laterna magika.
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Evaluation the properties of the cutting edge in fusion and flame cutting by solid state lasers
Dočekal, Miroslav ; Berka, Roman (referee) ; Mrňa, Libor (advisor)
The thesis compares oxidation and fusion laser cutting methods in the production of sheet components called Trager consoles. Individual methods of laser cutting are compared in terms of achieved quality and properties of cutting areas. Consequently, the effect of these properties on consecutive technological operations, which are mainly threading and pressing the nuts into components, are evaluated. In the experimental part of the thesis the roughness of cut surfaces was measured and the cuts were classified into quality classes according to the ČSN EN ISO 9013 standard. Metallographic samples were taken in order to measure hardness and determine its course in the direction from the cutting edge into the material. The metallographic samples were further used for capturing detailed images on the microscope and assessing the quality of nuts pressing. Afterwards, the cut moments affecting taps were measured in order to verify the impact of cutting edge properties on threading. These measurements provided sufficient data for comparing the influence of cutting edge properties in individual methods of laser cutting on consecutive operations. Finally, individual methods were compared in terms of production costs. According to all the data and the conclusions reached, fusion method was identified as the most suitable method of laser cutting for components manufacturing.
Laser welding of the abrasive steel
Berka, Roman ; Kubíček, Jaroslav (referee) ; Mrňa, Libor (advisor)
This project, elaborated within the master degree presents plates welding. Based on the literature study the problems of laser welding were designed optimal welding parameters. The material, on which were in the experimental part test and geometry analysis performed was steel Hardox 400 with thickness 5 mm. These welds were compared with welds made by MAG. Equipment used for werding was fiber laser.
Vertical Conveyer Categorisation
Berka, Roman ; Kašpárek, Jaroslav (referee) ; Škopán, Miroslav (advisor)
Vertical conveyor they are inseparably adherent on using in production and warehousing operation, because of specific character.

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3 Berka, Rostislav
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