|
|
Supporting Board Game Nemesis on Android Mobile Phone
Štěpánek, Miroslav ; Švec, Tomáš (referee) ; Smrž, Pavel (advisor)
The aim of this thesis is to create a mobile application for the board game Nemesis designed for the Android system, which will allow the user to find out information about the game components during the game. The solution consists of two main parts the first is a model created with the help of the Tensorflow library, which is responsible for the detection of these components. The second is the application itself, which receives results from the model and displays the resulting information to the user. This makes the game easier for the user and helps to speed it up. The resulting system can be modified so that the application can be used for other games.
|
|
|
Association behavior of diblock copolymers with pH-responsive and thermoresponsive blocks in aqueous solutions
Škorňa, Adam ; Štěpánek, Miroslav (advisor) ; Raus, Vladimír (referee)
Univerzita Karlova Přírodovědecká fakulta Studijní program: Makromolekulární chemie Studijní obor: Makromolekulární chemie Bc. Adam Škorňa Asociační chování dvojblokových kopolymerů s pH-responsivními a termoresponsivními bloky ve vodných roztocích Associationbehavior of diblock copolymers with pH-responsive and thermoresponsive blocks in aqueous solutions Diplomová práce Školitel: prof. RNDr. Miroslav Štepánek. Ph.D. Praha 2022/2023 Abstract The growing number of double-responsive block copolymers with well-defined physical properties have beensynthesizedbycontrolledradical polymerization inthe last decades.These block copolymers (BCPs) can have interestingarchitecture and very complex phase behaviour, resulting in so-called "schizophrenic" micellization. It was suggested previously that BCPs consisting of a polyelectrolyte block and a thermoresponsive block may exhibit so-called "schizophrenic" micellization: In selective solvents, depending on pH and temperature, solvophilic (core-forming) blocks of these BCPs may become solvophobic (corona-forming). In this thesis, we conducted a study of double-responsive diblockcopolymer poly(di-[ethylene glycol] methyl ether methacrylate)-b-poly(2-[diisopropylamino] ethyl methacrylate) (PDEGMA-b-PDIPAEMA), inwhich PDEGMA acts as thermoresponsive blockwithLCST of 27...
|
|
|
Study of self-assembly and degree of ionization of block copolymers using transmission electron microscopy and molecular simulations
Illés, Peter ; Nová, Lucie (advisor) ; Štěpánek, Miroslav (referee)
Responsive systems, such as block copolymers with solvent-affine blocks, can undergo self-assembly into structures like micelles or vesicles. These assem- blies are highly sensitive to slight changes in external conditions, like pH or temperature, leading to the formation or dissolution of micelles. When one of the polymer blocks is a weak polyelectrolyte, its degree of ionization depends not only on the external conditions but also on the association state. This study focuses on investigating the size and degree of ionization of micellar struc- tures formed by polymer chains containing thermoresponsive and pH-responsive blocks. The investigation combines high-resolution transmission electron mi- croscopy and Hamiltonian Monte Carlo simulations to provide a comprehensive understanding of these micellar structures. 1
|
|
|
Self-assemblies based on hydrophilic polymers in aqueous media
Fanova, Anastasiia ; Štěpánek, Miroslav (advisor) ; Pánek, Jiří (referee) ; Angelov, Borislav (referee)
This doctoral thesis is devoted to investigation of self-assemblies based on hydrophilic polymers (both homopolymers and block copolymers) in aqueous media. Specifically, we focused on two classes of systems: (i) hydrophilic polymers whose self-assembly in aqueous solutions is driven by association of terminal hydrophobic groups and (ii) double hydrophilic block polyelectrolytes whose self-assembly occurs via electrostatic complexation of polyelectrolyte blocks. For characterization of formed assemblies, we mostly used different scattering techniques (light scattering, small-angle X-ray scattering) in a combination with a number of supplementary methods including microscopy, fluorometry and calorimetry. Keywords: hydrophilic polymers, block copolymers, association, self-assembly, micelles, scattering
|
|
|
Supporting Board Game Nemesis on Android Mobile Phone
Štěpánek, Miroslav ; Švec, Tomáš (referee) ; Smrž, Pavel (advisor)
The aim of this thesis is to create a mobile application for the board game Nemesis designed for the Android system, which will allow the user to find out information about the game components during the game. The solution consists of two main parts the first is a model created with the help of the Tensorflow library, which is responsible for the detection of these components. The second is the application itself, which receives results from the model and displays the resulting information to the user. This makes the game easier for the user and helps to speed it up. The resulting system can be modified so that the application can be used for other games.
|
|
|
Preparation and characterization of nanoparticles formed by polymer-surfactant complexes
Dvořák, Filip ; Štěpánek, Miroslav (advisor) ; Netopilík, Miloš (referee)
In this work, copolymers of celulose-g-polystyrene (cel-PS) and celulose-g- poly(methylmetacrylate) (cel-PMMA) were characterized using static and dynamic light scattering, transmission electron microscopy and atomic force microscopy. Preparation of nanoparticles of these hydrophobic copolymers in aqueous solution was further studied, by means of precipitation from dioxane solutions using water with added low-molar-mass surfactants sodium dodecylsulfate (SDS) and dodecyltrimethylammonium bromide (DTMAB). It was shown that the ability of the surfactants to stabilize polymer nanoparticles is driven not only by the hydrophobic effect, but it depends also on specific interactions of the polar group of the surfactant with the surface of the nanoparticles. On the basis of the finding that the efficiency of stabilization of cel-PS copolymers is much higher than in case of linear PS, it can be concluded, that the branched structure of copolymers is favorable for the formation of hydrofobically stabilised polymer-surfactant complexes.
|
|
| |
|
| |
|
|
Interactions in solutions and gels of stimuli-responsive polymer systems investigated by NMR spectroscopy
Konefał, Rafał ; Spěváček, Jiří (advisor) ; Hrabal, Richard (referee) ; Štěpánek, Miroslav (referee)
Stimuli-responsive (stimuli-sensitive, intelligent, or smart) polymers are polymer materials which, after small external stimuli, evidently change their physical or chemical properties. Smart polymers can be classified according stimuli they respond to such as: temperature changes, mechanical stress, light irradiation, ultrasonic treatment, application of external magnetic as well as electric field, changes of pH, ionic strength, addition of the chemical agents and presence of biomolecules and bioactive molecules. Stimuli-responsive synthetic polymer systems has attracted considerable attention due to wide range of applications, i.e. controlled drug delivery and release systems, diagnostics, tissue engineering and 'smart' optical systems, as well as biosensors, microelectromechanical systems, coatings, and textiles. Among the types of stimuli for this dissertation temperature, pH and reactive oxygen species (ROS) responsive polymer systems were studied. In case of thermoresponsive polymers, when polymer chains are molecularly dissolved in a good solvent, changes (increasing or decreasing) of temperature result in insolubility (globular nanoparticles formation) of polymer chains, called temperature induced phase-separation. pH responsive polymers change properties such as: solubility, volume (gels),...
|
|
| |
guest ::
RSS feed.