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Alternative crosslinking methods for sodium alginate resulting in hydrogels with suitable application properties
Kouřilová, Ludmila ; Kráčalík, Milan (referee) ; Smilek, Jiří (advisor)
This diploma thesis is focused on the preparation of alginate gels with the potential to influence their final application properties (transparency, syneresis, viscoelastic properties, etc.). Based on literature review, a total of three gelation strategies leading to the gelation of sodium alginate were selected, namely ionotropic gelation by external gelation method, ionotropic gelation by internal gelation method, and alginate crosslinking with phytic acid, which is capable of forming both ionic bonds and intramolecular hydrogen bonds. Subsequently, the preparation of alginate gels was optimized, their mechanical properties were characterized, and finally, the influence of several factors (polymer concentration, amount of crosslinking agent, gelation time, addition of sucrose, etc.) on the resulting properties of the prepared gels was monitored. Within the scope of the thesis, it was demonstrated that the resulting properties of sodium alginate-based gels are influenced not only by the polymer concentration, the amount of crosslinking agent used, gelation rate, or syneresis, but in the case of ionotropic gelation by external gelation, for example, also by the type of anion used. An interesting part of the thesis is also the optimization of determining the mechanical properties of alginate gels through compression tests. During these tests, the sample is compressed between two rheometer sensors, and the mechanical response of sample to the applied force is measured. It is one of the most easily conceivable rheometric tests.
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The Ideal City Nitra: The Klokočina Central Zone
Ďurčovič, Martin ; Csanda, Milan (referee) ; Kratochvíl, Jan (advisor)
The research objective of my diploma thesis is to identify and examine the potential of the central zone of the Klokočina housing estate in Nitra City through a spatial study. I work with the urban development concept proposed in the city zoning plan, which I thoroughly analyse and further develop. The main emphasis of the work is on creating a quality public space and promoting socially sustainable ways of future building development. I design new urban spaces and the subsequent urban building structure that shapes the new urban spaces. The proposed spatial study can serve the city of Nitra as a quality reference material for decision-making in the territory and spatial planning, which provides sustainable urban development.
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Contemporary city
Zámečník, Kristián ; Joja, Milan (referee) ; Františák, Luboš (advisor)
To limit urban sprawl into the surrounding countryside, densification of development and use of neglected areas is necessary. In this thesis, I seek to address this by finding an ideal balance between density, open spaces and a diversity of functions that support the further development of the current area. The result should be a city that is viable, resilient and adaptable, delivering a quality living environment for its residents and supporting sustainable growth. A city that works as a whole with its new neighbourhood but is not overrun by it.
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SPATIAL CULTIVATION AND RESTORATION OF THE BUILDING CULTURE OF THE MINING SETTLEMENT IN BANSKÁ STIAVNICA (SK)
Vitkovič, Michal ; Šuška, Milan (referee) ; Havliš, Karel (advisor)
The diploma thesis deals with the city, which in the last decades has become a phenomenon that have expanded beyond the Slovak context. The former "silver well" of Hungary and at one time the largest mining centre of the Habsburg monarchy is now a UNESCO-labeled success story among the world's cities with a history of mineral extraction, and provides a haven for tourists as well as for a creative community of people coming from all over Slovakia. The volcanic territory of the Štiavnické Hills is intertwined with an urban structure set in a landscape that has been transformed by centuries of mining activity into a unique anthropomorphic entity. Its perception is largely "iconized" in the form of several "representatives" of the value of Banská Štiavnica - the Calvary, the Old and New Castle, the Square, Klopačka, Sitno Hill... But what lies beyond the interest in tourist destinations? If Banská Štiavnica's values could be simplified into the categories of urban and landscape, the interest of this thesis lies precisely between them - in the specific area of the miner's settlement of the slopes above the compact urban centre of the town. While the centre itself is firmly embedded in the perception of a 'significant historic city', the mining settlement of the slopes represents much more fragile values - as reflected in the monumental protection of the area, which was added to the core zone of the historical town reserve with a significant delay compared to the central part. The characteristic parcelization, the setting of buildings and roads in the steep terrain, the traditional farming reflecting the natural conditions and especially the buildings of local folk architecture reflecting the stylistic elements of the urban part of the town are a kind of shadow of the phenomenon of Banská Štiavnica. The lack of continuity in settlement, the intensification of cottage development and inappropriate landscaping, which erases years of cultural layering in the landscape, pose major challenges to the preservation of the value of Banská Štiavnica as a complex whole. The work therefore builds primarily on a strong analytical foundation that places the values and problems of this specific area in a broader context. The understanding of the fragile qualities of this territory is translated by the thesis into small interventions, which, however, are not a final, concrete proposal, but rather a materialization of principles of a conceptual, yet tangible approach. More than a project, therefore, the work should be an inspiration - whether for local actors, landowners, people in our professions or potential new permanent residents - to focus their attention also on the peripheral and overlooked places whose value is often hidden in the "everyday" and the ordinary.
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Culture in numbers 2023
Dedera, Milan ; NIPOS, Národní informační a poradenské středisko pro kulturu
Statistika kultury se zabývá zjišťováním údajů o činnosti kulturních subjektů (např. návštěvnost, kapacita, vzdělávací akce, vydané publikace, výpůjčky, čtenáři). V předkládané brožuře jsou zveřejněny vybrané údaje za následující obory: divadlo, galerie, muzea a památníky, hvězdárny, planetária a astronomické pozorovatelny, veřejné knihovny, památkové objekty zpřístupněné za vstupné, neperiodické publikace a periodický tisk. Údaje ekonomické povahy jsou k dispozici pouze za subjekty veřejného sektoru, kulturní subjekty v soukromém sektoru je neposkytují.
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Interval linear programming
Garajová, Elif ; Hladík, Milan (advisor) ; Kearfott, Ralph Baker (referee) ; Bartl, David (referee)
Interval linear programming provides a modern approach for handling optimization problems affected by various sources of interval-valued uncertainty. Given lower and upper bounds on the inexact data, the model represents a set of linear programs with coefficients that can be independently perturbed within the respective ranges. The thesis forms a systematic study of the optimality properties of interval linear programs and their solutions. Building on the existing research, we present a compilation of results published by the author, which fill in some of the gaps in the state-of-the-art literature on interval programming. We first examine the effects of standard transformations used in linear programming on the optimal solutions and optimal values of interval programs. Then, we characterize the properties of feasibility, optimality and (un)boundedness in the weak and in the strong sense (i.e. whether a property holds for some or for each scenario) and we analyze computational complexity of the associated decision problems. Further, we focus on the optimal solutions and prove that several related decision problems are (co)NP-hard even for interval programs with a fixed constraint matrix. We also show an integer programming reformulation useful in computing the optimal value range and discuss other concepts...
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Rotary Piston Engine for Small Mobile Systems
Drbal, Milan ; Puškár, Michal (referee) ; Žák,, Marek (referee) ; Píštěk, Václav (advisor)
The dissertation deals with the issue of 1D modelling of a rotary piston engine and prediction of engine characteristics for use in its further development. In this work, the 1D mathematical model of the engine is validated by measuring the combustion pressure in the work chamber, in the intake section and further in the exhaust channel. These data are used to determine the coefficients of the combustion model and, above all, the combustion chamber leakage model. Both effects cannot be modelled accurately included without measuring the work chamber pressures. The use of 1D mathematical simulations is well described in the literature for a reciprocating engine. However, their use for a rotary piston engine is more complicated from the point of view of the geometric differences of both types of engines. In this work, a suitable method of modelling rotary piston engines and their verification using technical experiments and CFD simulations will be described.
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Symbiotic imprint
Kachtíková, Michaela ; Tkáčová, Lucia (referee) ; Houser, Milan (advisor)
The thesis entitled "Symbiotic Imprint" explores the symbiotic relationship between the physicality and the mind through a meditative practice that materializes in a site-specific installation inside the catacombs. The thesis reflects the artist's personal research into the inner mental space that is transformed into physical form. The author presents a space that, while familiar to her, is at the same time alien, and which is constantly transforming and evolving as a result of long-term care. This process leads to the creation of a unique dialogue between external and internal environments, where physical interaction and presence of body become key components for deeper understanding and self-knowledge. The site-specific installation attempts to connect the outer and inner worlds, the visible and the hidden, inside and outside.
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Smart materials application in hydraulic systems
Montag, Jakub ; Klapka, Milan (referee) ; Kubík, Michal (advisor)
This thesis deals with the application of smart materials in hydraulic systems. In the first part, the hydraulic systems themselves and smart materials are described. This is followed by specific smart materials, where the principle of function, in which fields they can be found, applications in hydraulic systems and their advantages and disadvantages are described. Finally, the materials are summarised and compared with each other.
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