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Effect of sub-micrometer structural features on rheology of polymer nanocomposites
Lepcio, Petr ; Chodák,, Ivan (referee) ; doc.Ing.Marián Lehocký, Ph.D. (referee) ; Jančář, Josef (advisor)
Polymerní nanokompozity (PNCs) mají slibnou budoucnost jako lehké funkční materiály zpracovatelné aditivními výrobními technologiemi. Jejich rychlému rozšíření však brání silná závislost jejich užitných vlastností na prostorovém uspořádání nanočástic (NP). Schopnost řídit disperzi nanočástic je tak klíčovým předpokladem pro jejich uplatnění ve funkčních kompozitech. Tato práce zkoumá přípravu polymerních nanokompozitů v modelové sklotvorné polymerní matrici roztokovou metodou, technikou schopnou vytvářet prostorové uspořádání nanočástic řízené strukturními a kinetickými parametry přípravného procesu. Prezentované výsledky popisují rozdíly mezi změnami rheologického chování roztoku polystyrenu při oscilačním smyku s vysokou amplitudou (LAOS) vyvolanými nanočásticemi. Výsledky vedou k závěru, že vysoce-afinní OP-POSS nanočástice při nízkých koncentracích dobře interagují s PS a tvoří tuhé agregáty, zatímco nízko-afinní OM-POSS nanočástice za těchto podmínek neovlivňují deformační chování polymerních řetězců. Dále byla pozornost zaměřena na vliv použitého rozpouštědla na uspořádání nanočástic v SiO2/PMMA a SiO2/PS nanokompozitech, který je v literatuře prezentován jako parametr řídící prostorové uspořádání nanočástic v pevném stavu. Důraz byl kladen na kvalitativní rozdíly mezi „špatně dispergovanými“ shluky nanočástic, které byly na základě rheologie a strukturální analýzy (TEM, USAXS) identifikovány jako polymerními řetězci vázané nanočásticové klastry a dva typy agregátů, jeden termodynamického a druhý kinetického původu. Jednotlivé druhy agregátů se vyznačují odlišnými kinetikami vzniku a rozdílnými vlastnostmi jak mezi sebou, tak v porovnání s dispergovanými nanočásticemi. Pozorované typy disperze nanočástic byly kvantitativně posouzeny podle svých rheologických vlastností během roztokové přípravy, podle kterých byla vyhodnocena míra adsorpce polymeru na povrch nanočástic a atrakce ve vypuzeném objemu. Výsledky byly porovnány s teorií PRISM. Důležitost uspořádání nanočástic byla demonstrována na porovnání teplot skelných přechodů různých struktur při stejném chemickém složení.
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Memory Reduction of Stateful Network Traffic Processing
Hlaváček, Martin ; Puš, Viktor (referee) ; Kořenek, Jan (advisor)
This master thesis deals with the problems of memory reduction in the stateful network traffic processing. Its goal is to explore new possibilities of memory reduction during network processing. As an introduction this thesis provides motivation and reasons for need to search new method for the memory reduction. In the following part there are theoretical analyses of NetFlow technology and two basic methods which can in principle reduce memory demands of stateful processing. Later on, there is described the design and implementation of solution which contains the application of these two methods to NetFlow architecture. The final part of this work summarizes the main properties of this solution during interaction with real data.
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Installation and configuration of Octave computation cluster
Mikulka, Zdeněk ; Hasmanda, Martin (referee) ; Sysel, Petr (advisor)
This diploma thesis contains detailed design of high-performance cluster, primarely focused for parallel computing in Octave application. Each of component of this cluster is described along with instructions for installation and configuration. Cluster is based on GNU/Linux operating system and Message Parsing Interface. Design alllows implementation of this cluster in computers of schoolroom with active lessons.
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Use of fluorescent techniques in study of aerosol deposition
Lippay, Josef ; Jedelský, Jan (referee) ; Mravec, Filip (advisor)
Several experiments were designed for utilization of fluorescence spectroscopy as a method of aerosol particle detection in a model of lungs. One of the experiments was to arranged use luminescent properties of DEHS (bis(2-ethylhexyl)decandioate) for calculating aerosol deposition. The outcome of this experiment was confirmation of clusters existence, which causes luminescence of DEHS. But the luminescence is not enough dependent on concentration and as such is not suitable for calculation of aerosol deposition. As the next experiment DEHS-fluorescein particles were generated by condensation monodisperse aerosol generator (CMAG), where water was used instead of isopropyl alcohol as a solvent. By this alteration the negative influence of DEHS was eliminated, which caused results refinements of aerosol deposition. Generation of fluorescein sodium salt particles by small-scale powder disperser (SSPD) was designed as a last experiment. The lower deposition efficiency measured by this method was caused by particles polydispersion. Photo records were used for documentation of Hot-spots. Outcomes of this study are new knowledge of fluorescence spectroscopy utilization for study of aerosol deposition and possibilities of fluorescent aerosol particles generation. Acquired data can serve for knowledge extension of possible detection methods for aerosol particles in the model of lung and can serve for validation of numerical simulations.
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Twenty Eighty-Four
Truncová, Eva ; Sotelo, MArch Verónica Gallego (referee) ; Kristek, Jan (advisor)
The project follows up on the undergraduate work on the issue of control and surveillance in public space. Tendencies of absolute transparency, well-arranged and controllable public premises, supposedly implying security, are present in most of the newly emerging complexes of buildings and urban planning strategies. Whether it is done consciously or as a result of current “trends” and requirements, which only a few question, the space is built to meet these demands for easy controllability. The second method of control, which has also emerged during the era of modernism, is the control of the indoor climate through "mechanical environmental management" or through the use of fossil fuel energy for heating, cooling and ventilation. Current requirements for the comfort of the indoor environment presuppose a constantly, fully and homogeneously tempered environment, regardless of the outdoor climate or the time of year. Both control regimes permeate all measures of the urban environment and have a direct impact on its organization, form and, above all, on the regimes of its usage. Developers and their commissioned architects repeat well-proven business models and forms, without any major focus on the context of the place, and incorporate this "logic of control" into their buildings and surroundings. Housing complexes are planned and built up as one unit with a rigid structure and only a minimal possibility of their later alteration. The domain of control through transparency penetrates from the public space to the entrance door of the apartment unit. Indoor, social control changes to total control of the interior climate of the apartment, where the boundaries between seasons and day and night are blurred. The proposal is investigating alternative ways of urban planning and architecture. The project deals with the relationship between building, its surroundings and applicable regulations, standards and energy efficiency, along with the idea of adaptive living.
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Methodology of Competitive Strategy Creation of ICT Firms Implying the Clusters Membership
Sládková, Jitka ; Břusková, Pavla (referee) ; Koráb, Vojtěch (referee) ; Pavelková, Drahomíra (referee) ; Bartes, František (advisor)
The dissertation thesis is focused on the creation of the competitive strategy involving the cooperation with other subjects on the market. It has been chosen the concrete industry of Information and Communication Technologies (ICT). The specifics of this industry have been defined. Those specifics are highly determining factors for successful companies. ICT is extremely globalized and has interdisciplinary characteristics. It is the fastest developing industry with the lowest language barrier. This combination makes the ICT industry as a greatly potential world-wide expansion industry. The communication technologies became common part of information technologies and all together enter into other fields, such as energy, banking, health etc. The market is globalized and only one company has very small power. This is why the cooperation between companies is preferring form of gaining a number of strategic goals, e.g. entering new markets, collective R&D. The current state of competitive strategies and strategic alliances mapping is also the key part of the work. The clusters form of cooperation is described in more detail, because this platform of collaboration has been chosen as the most suitable one according the ICT industry specifics. Based on theoretical research the further research has been done. The collected data has been proceed with statistic methods used the MS Excel or STATISTICA software. The outputs show the key activities and factors of competitive cluster, together with potential risks and the benefits for the clusters members. All the above mentioned has been implied into the methodology of competitive strategy creation including the clusters membership. This methodology is the main goal of the dissertation thesis.
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Setup of Application-Computation On-Premise Mini-Cloud Based on Kubernetes
Stuchlý, Samuel ; Ryšavý, Ondřej (referee) ; Jeřábek, Kamil (advisor)
Kubernetes je platforma na orchestráciu kontajnerov, na nasadenie a správu aplikácií v klastri. Cieľom tejto práce je porozumieť kubernetes a jeho komponentom a následne navrhnúť a sprevádzkovať optimálnu architektúru kubernetes klastru pre malý mini-cloud založený na kubernetes v areáli univerzity VUT. Táto bakalárska práca rozoberá základy kontajnerov, runtime kontajnerov, nástroje na orchestráciu kontajnerov, architektúru Kubernetes a jej komponenty a automatizačnú platformu Ansible. Ďalej obsahuje popis navrhnutej architektúry klastra, ktorá bude implementovaná. Príspevok tejto práce spočíva v návrhu architektúry kubernetes klastra, ktorý bude neskôr nasadený na pôde univerzity, pripravený na použitie.
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Heterogenous block
Konopka, Pavel ; Kovařík, David (referee) ; Hora, Jan (advisor)
The subject of this project is development of municipal housing on the western edge of Louny. It dives into the context of living in a small town and aims to provide a more efficient alternative to the current urban study on the same area. The project deals with the special relations between apartments and the street and their scale. It originates from smaller units and composes them into larger parts, from special conception and individual apartments to an urban plan. The result is a hundred of apartment units in a compact structure that has a human scale and highlights the values of neighbourhoods and public spaces.
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Klastry v Jihočeském kraji a Horním Rakousku
GRYGAROVÁ, Lenka
Clusters are instrument for improvement of position in a market too. Cluster Formations keep up high part in markets of single sectors and cooperations. Universities and economic chambers arrange getting of new experiences and skills in definite regions.
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