Legal regulation of weaponis and ammunitio--

Právní úprava zbraní a střeliva Abstrakt Tématem předkládané práce je právní úprava zbraní a střeliva analyzovaná v kontextu dvou právních systémů, a to právní úpravy České republiky, obsažené především v ustanoveních zákona o zbraních, kterým se věnuje první kapitola této práce, a právní úpravy Spojených státu amerických, a to zejména na úrovni federálních předpisů včetně Druhého dodatku Ústavy, avšak s nezbytným přesahem do úpravy jednotlivých států federace, které jsou obsaženy v kapitole druhé. Strukturálně jsou kapitoly dále děleny na podkapitoly a čtenář je v rámci nich zasvěcen nejen do právních ustanovení příslušných předpisů, která autor práce připravil, a v případě těch cizojazyčných i přeložil, ale i do související judikatury a kontextu této komplexní problematiky, která je dále zprostředkována díky cizojazyčné i tuzemské literatuře, ze které práce rovněž vychází. Po provedení důkladné deskripce a rozboru všech příslušných ustanovení pak dochází ke komparaci nabytých znalostí v kapitole třetí a poslední, jež je syntézou i srovnáním vybraných aspektů, které byly vybrány tak, aby vhodně odrážely specifika úpravy fenoménu palných zbraní napříč odlišnými právními systémy, a to vždy v příslušném kontextu. V rámci tohoto akademickém exkurzu lze v práci vyzdvihnout důkladný rozbor rozhodnutí Nejvyššího...2 Legal regulation of weapons and ammunition Abstract The topic of the presented thesis is the legal regulation of weapons and ammunition analyzed in the context of two legal systems, namely the legislation of the Czech Republic, contained mainly in the provisions of the Weapons Act, which is the subject of the first chapter of this thesis, and the legislation of the United States of America, especially on at the level of federal regulations, including the Second Amendment to the Constitution, but with the necessary overlap into the regulation of the individual states of the federation, which are contained in Chapter Two. Structurally, the chapters are further divided into sub-chapters, and within them the reader is introduced not only to the legal provisions of the relevant regulations, which the author of the work prepared, and in the case of those in foreign languages, also translated, but also to the related jurisprudence and the context of this complex issue, which is further mediated thanks to foreign language and domestic literature, from which the work is also based. After a thorough description and analysis of all relevant provisions, a comparison of the acquired knowledge occurs in the third and last chapter, which is a synthesis and comparison of selected aspects that were chosen to appropriately...Katedra správního práva a správní vědyDepartment of Administrative Law and Administrative SciencePrávnická fakultaFaculty of La

Legal regulation of weaponis and ammunitio--

2 Legal regulation of weapons and ammunition Abstract The topic of the presented thesis is the legal regulation of weapons and ammunition analyzed in the context of two legal systems, namely the legislation of the Czech Republic, contained mainly in the provisions of the Weapons Act, which is the subject of the first chapter of this thesis, and the legislation of the United States of America, especially on at the level of federal regulations, including the Second Amendment to the Constitution, but with the necessary overlap into the regulation of the individual states of the federation, which are contained in Chapter Two. Structurally, the chapters are further divided into sub-chapters, and within them the reader is introduced not only to the legal provisions of the relevant regulations, which the author of the work prepared, and in the case of those in foreign languages, also translated, but also to the related jurisprudence and the context of this complex issue, which is further mediated thanks to foreign language and domestic literature, from which the work is also based. After a thorough description and analysis of all relevant provisions, a comparison of the acquired knowledge occurs in the third and last chapter, which is a synthesis and comparison of selected aspects that were chosen to appropriately..

Selected properties of the polymer blends styrene homopolymer with impact resistant polystyrene

Studie o fyzikálně-mechanických, tepelných a reologických vlastnostech polymerních směsí homopolymeru styrenu a houževnatého polystyrenu. Popis vlivu zvyšujícího se obsahu homopolymeru styrenu ve směsi na uvedené vlastnosti. Určení optimálního poměru složek ve směsi homopolymer styrenu - houževnatý polystyren.Dokončená práce s úspěšnou obhajobo

Stanovení únavových charakteristik vysokopevné chromnikl-molybdenové oceli

PrezenčníNeuvedenoNeuveden

Effects of Immobilized Ionic Liquid on Properties of Biodegradable Polycaprolactone/LDH Nanocomposites Prepared by In Situ Polymerization and Melt-Blending Techniques

The high capacity of calcinated layered double hydroxides (LDH) to immobilize various active molecules together with their inherent gas/vapor impermeability make these nanoparticles highly promising to be applied as nanofillers for biodegradable polyester packaging. Herein, trihexyl(tetradecyl)phosphonium decanoate ionic liquid (IL) was immobilized on the surface of calcinated LDH. Thus, the synthesized nanoparticles were used for the preparation of polycaprolactone (PCL)/LDH nanocomposites. Two different methods of nanocomposite preparation were used and compared: microwave-assisted in situ ring opening polymerization (ROP) of ε-caprolactone (εCL) and melt-blending. The in situ ROP of εCL in the presence of LDH nanoparticles with the immobilized IL led to homogenous nanofiller dispersion in the PCL matrix promoting formation of large PCL crystallites, which resulted in the improved mechanical, thermal and gas/water vapor barrier properties of the final nanocomposite. The surface-bonded IL thus acted as nanofiller surfactant, compatibilizer, as well as thermal stabilizer of the PCL/LDH nanocomposites. Contrary to that, the melt-blending caused a partial degradation of the immobilized IL and led to the production of PCL nanocomposites with a heterogenous nanofiller dispersion having inferior mechanical and gas/water vapor barrier properties

Self-Healing and Super-Elastomeric PolyMEA-co-SMA Nanocomposites Crosslinked by Clay Platelets

Novel solvent-free ultra-extensible, tough, and self-healing nanocomposite elastomers were synthesized. The self-assembled materials were based on the copolymer matrix poly(methoxyethyl acrylate-co-sodium methacrylate) physically crosslinked by clay nano-platelets (‘poly[MEA-co-SMA]/clay’). Depending on the content of SMA, the super-elastomers were predominantly hydrophobic, water-swelling, or fully water-soluble, and hence repeatedly processible. The SMA co-monomer introduces a tremendous increase in tensile strength, an increase in toughness, while ultra-extensibility is preserved. By tuning the contents of nano-clay and SMA co-monomer, a very wide range of product properties was achieved, including extreme ultra-extensibility, or high stiffness combined with more moderate super-extensibility, or very different values of tensile strength. There was very attractive, great improvement in autonomous self-healing ability induced by SMA, combined with tremendously enhanced self-recovery of internal mechanical damage: even complete self-recovery could be achieved. The ionic SMA repeat units were found to assemble to multiplets, which are phase-separated in the hydrophobic polyMEA matrix. The dynamics of SMA-units-hopping between these aggregates was of key importance for the mechanical, visco-elastic, tensile, and self-healing properties. The studied super-elastomers are attractive as advanced self-healing materials in engineering, soft robotics, and in medical or implant applications

Conducting polymer composite aerogel with magnetic properties for organic dye removal

Multifunctional conducting polyaniline/hexaferrite aerogels supported by poly(vinyl alcohol) have been prepared by simple one-step procedure. The incorporation of magnetic particles into aerogel matrix was successfully proven with scanning electron microscopy and by examination of magnetic properties. Such novel hybrid aerogels showed better resistance against elastic deformation when stress is applied, increased conductivity compared to neat polyaniline/poly(vinyl alcohol) cryogels, and also enhanced coercive force compared with neat hexaferrite due to increased effective magnetic anisotropy by magnetostriction. Moreover, the efficient adsorption of Reactive Black 5 dye by aerogel has been illustrated. Therefore, this work offers new type of macroporous dye adsorbents which can be efficiently separated from the aqueous medium and thus used for wastewater treatment. © 2019 Elsevier B.V.Czech Science FoundationGrant Agency of the Czech Republic [1804669S

Biocompatible and antibacterial gelatin-based polypyrrole cryogels

Polypyrrole-gelatin cryogels were synthesized by oxidative cryopolymerization of pyrrole in the presence of gelatin. Vibrational spectroscopy confirmed formation of doped polypyrrole. Mechanical and pore structure stability of the resulting macroporous materials (pore size 10–50 μm) was shown to increase with increasing of gelatin content in initial polymerization medium, reaching plateau at 6 wt%. Thermal stability of polypyrrole-gelatin cryogels was found to be enhanced in comparison to its individual components. Electrical conductivity of all prepared cryogels (2–5 S cm−1) was similar to that of conventional polypyrrole. Cytotoxicity of polypyrrole-gelatin cryogels was found to decrease with increasing of gelatin concentration in the initial reaction mixture. The cryogel obtained using 8 wt% of gelatin showed the lowest cytotoxic effect reaching only mild cytotoxicity at 100% extract concentration. Polypyrrole-gelatin gels showed significant level of antibacterial activity without additional antibacterial agents. © 2020 Elsevier LtdCzech Science FoundationGrant Agency of the Czech Republic [18-04669S, 19-16861S]; TBU in Zlin [IGA/CPS/2019/001

Highly conducting and biocompatible polypyrrole/poly(vinyl alcohol) cryogels

Conducting macroporous soft cryogels were prepared by the oxidation of pyrrole within the frozen aqueous solutions of 5–8 wt.% poly(vinyl alcohol) at −24 °C. Mechanical properties of cryogels were independent of poly(vinyl alcohol) concentration, Young moduli were ≈20 kPa. The conductivity of compressed freeze-dried composites reached 18 S cm −1 thus exceeding the conductivity of polypyrrole alone. This level of conductivity was also preserved after long-term treatment with water, i.e. close to physiological conditions. In-vitro determined cytotoxicity demonstrated high potential applications due to low cytotoxicity. Moreover, compared to the steel based materials, the cryogels mimic the properties of soft tissues. All these properties are a prerequisite for the utilization in biomedical applications. © 2019 Elsevier B.V.Czech Science Foundation [17-05095S