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Quality of PCB Surface Finishes and Test Coupon Optimization
Minář, Jan ; Přikryl, Tomáš (referee) ; Starý, Jiří (advisor)
This master’s thesis deals with measuring and evaluation of wetting for samples of different surface finishes, using a test coupon developed in cooperation with firm Gatema. It deals with surface finishes ENIG and immersion tin. For these samples deals with quality monitoring and periodic testing of these surface finishes. The solder using for tests is SAC305. Test methods are used for simulation of reflow soldering and wave soldering.
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Dielectric properties of thermally aged slot insulations
Přikryl, Tomáš ; Frk, Martin (referee) ; Rozsívalová, Zdenka (advisor)
Bachelor's thesis monitor changes in the basic properties of dielectric isolation on the basis of polyester film during the humidity changes. The samples of material were measured time according rechargeable inab and dischargable ivyb currents in humidities 0 %, 33 %, 75 %, 95 % and ambient temperature. Further work is monitored by the time dependence of internal rezistivity depending on the time of ageing and relative humidity. The subject of experiments is material ISONOM NKN 2039 companie ISOVOLTA Elektroisolierstaffe.
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Dielectric absorption characteristics of stressed slot insulations
Přikryl, Tomáš ; Frk, Martin (referee) ; Rozsívalová, Zdenka (advisor)
Master's thesis is monitoring changes in basic dielectric properties. Monitoring changes in absorbency of characteristics and temporal dependences in rezistance with change of relative humidity. On the colection samples were measured temporal dependences charged and uncharged currents in ambient temperature and 0%, 55%, 75%, 95% relative humidity. The next part of my work is monitoring temporal dependences interior rezistance in the time of ageing in different humidities. Experiments were made on material ISONOM NKN and NMN.
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Webová aplikace pro herní komunitu OLT
Přikryl, Tomáš
This bachelor thesis is about design, development and deployment of web application for gaming community OLT. Web application will be based on these technologies: Node.js on the Back End and Vue.js with Quasar framework on the Front End. App will be deployed using Docker containers.
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Miocene fish fauna from the Cheb and Sokolov Basins: taxonomic overview and palaeoecology
Hakalová, Pavla ; Přikryl, Tomáš (advisor) ; Mazuch, Martin (referee)
The aim of this thesis is to present an overview of Miocene fish fauna of the lacustrine sediments in the Cheb and Sokolov Basins, geological settings of this area, and fish associations in individual biozones. Sediments of Cheb and Sokolov Basins were deposited during time interval from Eocene until Miocene in the subtropical zone of the North hemisphere. Volcanic and post-volcanic activities of the Ohárecký rift influenced development of these basins. It's possible define two time sections within development of these basins: early and later; both of them provide rich record of fossil fishes. For the early period of the development is typical smaller range of the lake and its shallow depth. The relicts of this stage are limited to Cheb Basin mainly. Fish fossil record is limited, with three species only: Esox sp., Palaeotinca egeriana and Leuciscus (Palaeoleuciscus) socoloviensis. Low fish diversity could have been affected by poor living conditions or lower taxonomic diversity in general during this time. The later developmental period was much longer. The lake was much bigger - it spread to Sokolov Basin also. The fish fauna diversity is much higher, including taxons Paleotinca egariana, Leuciscus (Palaeoleuciscus) socoloviensis, Aphanius chebianus, Paralebias egeranus and Gobius sp. It is...
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Research on Cenozoic fish fauna of the selected localities of the Czech Republic
Přikryl, Tomáš ; Zajíc, Jaroslav (advisor) ; Holec, Peter (referee) ; Chang, Mee-mann (referee)
RESEARCH ON CENOZOIC FISH FAUNAE OF THE SELECTED LOCALITIES OF THE CZECH REPUBLIC The submitted PhD thesis is presented as a collection of commentaries of fish faunas and its paleoecology at 10 selected localities of Czech Republic. The results were supported by specimens also from other geographical regions. The fish faunae were studied on following localities: Kelč, Rožnov pod Radhoštěm, Litenčice, Krumvíř, Vážany nad Litavou, Strachotín, Opava - Kateřinky, Kučlín u Bíliny, Byňov and Bechlejovice. The summarized results: a) There were recognized direct evidences about feeding habits in following taxa from Menilitic and Ždánice-Hustopeče formations: Scopeloides glarisianus, Anenchelum glarisianum, Lepidopus glarisianus, Trachinus minutus, Serranus budensis, Merluccius latus, Oligophus moravicus. b) The partial trophic diagram has been constructed within Menilitic and Ždánice-Hustopeče formations (for the region of the Czech Republic). The first trophic assemblage (group A) is composed of species Scopeloides glarisianu, Anenchelum glarisianum, respectively Lepidopus glarisianus, gadiform fishes and invertebrate members. The second one (group B) is characterized by species Serranus budensis, argentinid fishes and in some part of European region (e.g. in Poland) also genus Holosteus. The species Trachinus...
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Comparative analyses of cranial skeletogenesis and odontogenesis in basal Ray-finned fishes
Pospíšilová, Anna ; Černý, Robert (advisor) ; Přikryl, Tomáš (referee) ; Buchtová, Marcela (referee)
Skeletal (cartilaginous, bony, and dental) tissues undoubtedly exemplify the key innovation of vertebrates. Among all recent vertebrates, the most numerous and successful lineage is represented by the Ray-finned fishes that, accordingly, exhibit amazing variety of skeletal architectures and phenotypic adaptations. In order to depict fundamental principles of fish cranial skeletogenesis the developmental formation of skeletal architectures was described, compared and analyzed using members of early branching fish lineages, that exemplify very different strategies of skeletogenesis. While the Senegal bichirs and the Tropical gars are heavily armored forms with massive exoskeleton and hyperossified dental structures covering the whole oropharyngeal region, the European sterlets, on the contrary, possess mostly cartilaginous skeleton and reduce their dental structures during early development. Whole analysis is underpinned by the Northen pike, teleostean species with lightened skeletal architecture with comparable number of cranial elements. The present study represents the first complex comparative analysis of their skeletogenesis and odontogenesis. This allowed to define developmental strategies founding different lineage-specific skeletal architecture of vertebrates. Comparative description of...
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Optimization in selected engineering problems
Přikryl, Tomáš ; Popela, Pavel (referee) ; Mrázková, Eva (advisor)
The goal of this paper is a basic understanding of elementary concepts of the mathematical programming field and an aplication of such concepts for the optimization of machine design. The subject of nonlinear optimization is put under deeper scrutiny and so are solution methods of nonlinear problems. This paper also contains essential findings about shafts in the context of engineering components. In the practical part these findings are applied for an optimization of a shaft where the goal is to minimize the shaft’s weight.
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Review of representatives of the genus Diplocynodon [Diapsida, Crocodylia] from Czech Republic
Chroust, Milan ; Mazuch, Martin (advisor) ; Přikryl, Tomáš (referee)
The genus Diplocynodon is a basal alligatoroid with a range of endemic distribution in Europe. The oldest known founds are from Late Palaeocen and the youngest known founds are from Late Miocene. Fossils of this specimen are known also from the Czech republic. In the Master thesis were collected more than 600 founds, mostly fragmentary. In the collections of University of Vienna was found almost complete skull of probably genus Diplocynodon darwini from the Czech republic. The main goal of Master thesis is to make a complexe catalogue of Diplocynodon material from the Czech republic. Key words: Crocodylia, Diplocynodon, Czech republic
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