Experimental Verification of 3D Printing Usage for Tool Holders

Tahle práce se zabývá zkoumáním vlastností tří polymerních materiálů používaných pro 3D tisk. Úkolem práce je zjistit, zda jsou tyto materiály vhodnou alternativou pro výrobu nástrojových držáků. Z každého materiálu byly vytisknuty držáky, které byly poté spojeny s vyměnitelnou břitovou destičkou a testovány na soustruhu. Testování probíhalo na vnějším podélném soustružení a na nylonovém obrobku. Výsledky byly zaznamenány do tabulek a grafů, které nám umožňují jasně vidět výsledky experimentu.This bachelor thesis is focused on researching properties of three polymer materials used in 3D printing technologies. Main goal of the thesis is to find out if these three materials are the right alternative choices for manufacturing tool holders. Tool holders were printed from each material and were joined together with a cutting edge plate and tested on turning machine. Testing was done on external turning operation and on nylon workpiece. The results were put into graphs and charts that clearly indicate the results of the experiments.346 - Katedra obrábění, montáže a strojírenské metrologievelmi dobř

3D printing of Nitinol: Technology, Microstructural and Macrostructural Characteristics

Tato práce se zabývá problematikou aditivní výroby nitinolu. V práci je krátce popsán vznik a vývoj nitinolu a metody vhodné pro jeho výrobu. Práce se detailněji zabývá charakteristikou tohoto materiálu. V práci jsou popsány strukturní charakteristiky nitinolu, jeho unikátní schopnosti čímž jsou superelasticita a shape memory efekt. Jsou popsány jeho mechanické vlastnosti. Detailněji je rozebráno téma vlivu parametrů aditivní výroby a prášku na strukturu a vlastnosti tohoto materiálu. Práce také pokrývá tepelné zpracování a dokončovací metody výroby nitinolu. Velkou část práce představuje využití nitinolu v medicíně, kde má tento materiál stále větší zastoupení oproti konvenční materiálům. Pozornost je věnována i kompatibilitě materiálu s lidským tělem a jejich problémech. Na závěr se tato práce věnuje oblastem materiálu, které nejsou úplně známé a je potřeba je vyřešit.This thesis deals with the issue of additive manufacturing of nitinol. The creation and development of nitinol and methods suitable for its production are briefly described in the work. The work deals with the characteristics of this material in more detail. The thesis describes the structural characteristics of nitinol and its unique abilities such as superelasticity and shape memory effect. Its mechanical properties are also described. The subject of the influence of additive manufacturing parameters and powder on the structure and properties of this material is analysed in more detail. The work also covers the heat treatment and finishing methods of nitinol production. A large part of the work is the use of nitinol in medicine, where this material is increasingly represented compared to conventional materials. Attention is also paid to the compatibility of the material with the human body and its problems. In conclusion, this work deals with areas of the material that are not completely known and need to be studied further.346 - Katedra obrábění, montáže a strojírenské metrologievýborn

Geopriestorové modelovanie slnečného žiarenia na rôznych rozlišovacích úrovniach

Prezenční548 - Institut geoinformatikyNeuveden

The Spatial Distribution of Photovoltaic Power Plants in Relation to Solar Resource Potential: The Case of the Czech Republic and Slovakia

Over the last few years, many European countries experienced a rapid growth of photovoltaic (PV) power plants. For example, more than 20, 000 new PV power plants were built in the Czech Republic. The high spatial and temporal variability of the solar resource and subsequent PV power plant production, poses new challenges for the reliability and predictability of the power grid system. In this paper, we analyse the most recent data on PV power plants built in the Czech Republic and Slovakia, with a focus on the spatial distribution of these installations. We have found that these power plants scarcely follow the solar resource potential and, apparently, other factors affect decisions for their location. Recent changes in the support schemes for solar applications also influence these patterns, with new installations mostly confined to built-up areas. These changes will require new tools to assess the appropriate locations of PV systems

Prostorové rozložení fotovoltaických elektráren ve vztahu k potenciálu solárního zdroje :případová studie České a Slovenské republiky

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Główne kierunki i problemy rozwoju turystyki narciarskiej w Republice Słowackiej

Ski tourism is one of the most prospective kinds of tourism in Slovakia. Favourable physical and geographical conditions of the country have stimulated development of skiing and the creation of ski centres that have become the centres of winter tourism. Because of mass character of skiing, the construction of ski lifts and means of transport, their technical and technological modernizations, as well as the development of services have become important pre-conditions for the development of ski tourism. Ski localities and centres are situated almost all over the territory of Slovakia, but their largest concentration is in northern Slovakia. They are concentrated in nine regions of tourism where also the most important international tourist centres are situated. Not only old ski and tourism centres have been developing, but also new ski centres, the so-called "greenfields" have been created, such as, for example, Valčianska Valley in the Malá Fatra Mountains near Martin. The development of ski tourism causes, undoubtedly, various problems and negative impacts on various spheres: 1. Some ski centres are situated in the protected areas of the Natura 2000 network. The ongoing considerable construction and its extension usually do not comply with regional ecological regulations. Moreover, the construction causes undesirable changes in the physiognomy of the area and leads to the loss of its authenticity (for example, the construction and architectural chaos in the Donovaly centre). 2. Big investment projects in the centres situated in the protected areas are in contradiction with the constraints of nature conservation. That is why the investors try to change the zoning system in these regions. As a response to this, environmentalists, ecologists and foresters show negative attitudes and opinions regarding the investor's intentions and plans. 3. Just like in the Polish ski centres (Mika 2009), there are legal issues concerning the relations between the plot owners and ski-lift service providers in Slovakia. 4. Especially smaller areas (closely connected with mountain hotels) that do not have snow cannons are dependent on snow and weather, which means that during dry winters they cannot operate. 5. Ski centres which obtain considerable grants from the European Union are rather bigger than small. Smaller ski centres therefore suffer from lack of money necessary to maintain their operation. 6. Not only ski tourism but tourism in general and its development are negatively influenced by the world economic crisis. In regard to the modernization of ski infrastructure, large Slovak ski centres are comparable to Alpine centres. The management of these centres endeavours to extend the stay of the tourists in these centres from one-day to longer stays, especially by offering the tourists advantageous tourist packages including ski passes. What is important here, it is the willingness of service providers to cooperate. Tourists' most favourite activities are the visits to thermal out-door and in-door pools situated close to the ski centres, the co-operation with the spa centres, and wellness activities. Additional services are also provided. To attract visitors, the centres of the international importance organize regular events such as sled dog race in the Donovaly Mountains. The main strategy of these centres is to change their character from seasonal to year-round centres like the resorts of Vysoké Tatry-Starý Smokovec, Vysoké Tatry-Tatranská Lomnica or trbské Pleso. From the regional point of view, it is important to maintain and support smaller ski centres as the complementary areas to big ski centres. Smaller centres provide especially urban population with peaceful rest and an escape from the civilization stress. The smaller centres have better predisposition for the development of ecotourism which would not be in contradiction with the environmental protection of the country. They can also potentially offer job opportunities for the local inhabitants whose employment in mountain villages is problematic

Główne kierunki i problemy rozwoju turystyki narciarskiej w Republice Słowackiej

Ski tourism is one of the most prospective kinds of tourism in Slovakia. Favourable physical and geographical conditions of the country have stimulated development of skiing and the creation of ski centres that have become the centres of winter tourism. Because of mass character of skiing, the construction of ski lifts and means of transport, their technical and technological modernizations, as well as the development of services have become important pre-conditions for the development of ski tourism. Ski localities and centres are situated almost all over the territory of Slovakia, but their largest concentration is in northern Slovakia. They are concentrated in nine regions of tourism where also the most important international tourist centres are situated. Not only old ski and tourism centres have been developing, but also new ski centres, the so-called "greenfields" have been created, such as, for example, Valčianska Valley in the Malá Fatra Mountains near Martin. The development of ski tourism causes, undoubtedly, various problems and negative impacts on various spheres: 1. Some ski centres are situated in the protected areas of the Natura 2000 network. The ongoing considerable construction and its extension usually do not comply with regional ecological regulations. Moreover, the construction causes undesirable changes in the physiognomy of the area and leads to the loss of its authenticity (for example, the construction and architectural chaos in the Donovaly centre). 2. Big investment projects in the centres situated in the protected areas are in contradiction with the constraints of nature conservation. That is why the investors try to change the zoning system in these regions. As a response to this, environmentalists, ecologists and foresters show negative attitudes and opinions regarding the investor's intentions and plans. 3. Just like in the Polish ski centres (Mika 2009), there are legal issues concerning the relations between the plot owners and ski-lift service providers in Slovakia. 4. Especially smaller areas (closely connected with mountain hotels) that do not have snow cannons are dependent on snow and weather, which means that during dry winters they cannot operate. 5. Ski centres which obtain considerable grants from the European Union are rather bigger than small. Smaller ski centres therefore suffer from lack of money necessary to maintain their operation. 6. Not only ski tourism but tourism in general and its development are negatively influenced by the world economic crisis. In regard to the modernization of ski infrastructure, large Slovak ski centres are comparable to Alpine centres. The management of these centres endeavours to extend the stay of the tourists in these centres from one-day to longer stays, especially by offering the tourists advantageous tourist packages including ski passes. What is important here, it is the willingness of service providers to cooperate. Tourists' most favourite activities are the visits to thermal out-door and in-door pools situated close to the ski centres, the co-operation with the spa centres, and wellness activities. Additional services are also provided. To attract visitors, the centres of the international importance organize regular events such as sled dog race in the Donovaly Mountains. The main strategy of these centres is to change their character from seasonal to year-round centres like the resorts of Vysoké Tatry-Starý Smokovec, Vysoké Tatry-Tatranská Lomnica or trbské Pleso. From the regional point of view, it is important to maintain and support smaller ski centres as the complementary areas to big ski centres. Smaller centres provide especially urban population with peaceful rest and an escape from the civilization stress. The smaller centres have better predisposition for the development of ecotourism which would not be in contradiction with the environmental protection of the country. They can also potentially offer job opportunities for the local inhabitants whose employment in mountain villages is problematic

Combined Use of Terrestrial Laser Scanning and UAV Photogrammetry in Mapping Alpine Terrain

Airborne and terrestrial laser scanning and close-range photogrammetry are frequently used for very high-resolution mapping of land surface. These techniques require a good strategy of mapping to provide full visibility of all areas otherwise the resulting data will contain areas with no data (data shadows). Especially, deglaciated rugged alpine terrain with abundant large boulders, vertical rock faces and polished roche-moutones surfaces complicated by poor accessibility for terrestrial mapping are still a challenge. In this paper, we present a novel methodological approach based on a combined use of terrestrial laser scanning (TLS) and close-range photogrammetry from an unmanned aerial vehicle (UAV) for generating a high-resolution point cloud and digital elevation model (DEM) of a complex alpine terrain. The approach is demonstrated using a small study area in the upper part of a deglaciated valley in the Tatry Mountains, Slovakia. The more accurate TLS point cloud was supplemented by the UAV point cloud in areas with insufficient TLS data coverage. The accuracy of the iterative closest point adjustment of the UAV and TLS point clouds was in the order of several centimeters but standard deviation of the mutual orientation of TLS scans was in the order of millimeters. The generated high-resolution DEM was compared to SRTM DEM, TanDEM-X and national DMR3 DEM products confirming an excellent applicability in a wide range of geomorphologic applications

HIGH RESOLUTION AIRBORNE LASER SCANNING AND HYPERSPECTRAL IMAGING WITH A SMALL UAV PLATFORM

The capabilities of unmanned airborne systems (UAS) have become diverse with the recent development of lightweight remote sensing instruments. In this paper, we demonstrate our custom integration of the state-of-the-art technologies within an unmanned aerial platform capable of high-resolution and high-accuracy laser scanning, hyperspectral imaging, and photographic imaging. The technological solution comprises the latest development of a completely autonomous, unmanned helicopter by Aeroscout, the Scout B1-100 UAV helicopter. The helicopter is powered by a gasoline two-stroke engine and it allows for integrating 18 kg of a customized payload unit. The whole system is modular providing flexibility of payload options, which comprises the main advantage of the UAS. The UAS integrates two kinds of payloads which can be altered. Both payloads integrate a GPS/IMU with a dual GPS antenna configuration provided by OXTS for accurate navigation and position measurements during the data acquisition. The first payload comprises a VUX-1 laser scanner by RIEGL and a Sony A6000 E-Mount photo camera. The second payload for hyperspectral scanning integrates a push-broom imager AISA KESTREL 10 by SPECIM. The UAS was designed for research of various aspects of landscape dynamics (landslides, erosion, flooding, or phenology) in high spectral and spatial resolution