|
|
Evolution of algorithm for artificial creatures
Kohout, Jan ; Holan, Tomáš (advisor) ; Mráz, František (referee)
The task of this work is to create an application which allows performing of experiments with evolution of artificial creatures. Behavior of each creature is managed by its algorithm. The algorithm is able to use creature's memory cells (which represent logical variables) and is the genome of the creature. By the crossing-over and mutation, the algorithm evolves. The second aim of this work is to make some tests with the application and describe their results.
|
|
| |
|
| |
|
|
Purpose of epicentrum agency and marketpace for a new agency after its closure
Kohout, Jan ; Trunečková, Ludmila (advisor) ; Osvaldová, Barbora (referee)
This thesis recapitulates activities of Epicentrum agency which was reporting from the crisis places in the world and due to its termination of activities it attempts to define the meaning of Epicentrum. There is no doubt that Epicentrum was unique, but the important thing is to understand the causes and circumstances of its establishment and actions and to describe the way Epicentrum worked, including the both positive and negative aspects. Since the days of Epicentrum the world of media has changed fundametally (although it has not been that long). There is the phenomenon of media internetisation which the traditional media do not know how to deal with. Consequences of digitization have meant significant changes in journalists' work and the theme of this thesis is how could similar agency operate in these days. Today the proccess of producing the reports from the field is faster and cheaper which is advantage, on the other hand it is much easier to gather the large amount information for free these days and it is hard to convince media to buy it from such an agency. Therefore the integral part of this work is also a reflection on the value of on-the-spot reporting and its subsequent application possibilities on the market.
|
|
|
Chemical and Physical Properties of Impact Glasses
Křížová, Šárka ; Skála, Roman (advisor) ; Kohout, Tomáš (referee) ; Macháček, Jan (referee)
Abstract This work deals with microstructural features, chemistry and the search for traces of a meteoritic component in proximal tektite-like glasses from the Zhamanshin impact structure (Kazakhstan; further abbreviated as ZIS), and tektites from two strewn fields - moldavites (Czech Republic) and Australasian tektites (Laos; further abbreviated as AAT). Detailed microstructural observations and subsequent chemical and mineralogical studies of various types of inclusions were also performed; these inclusions were mostly found in the studied types of glasses for the first time ever. The aim of this PhD thesis was to (i) describe the microstructure of all studied glasses with a focus on yet unobserved microstructural phenomena, and (ii) try to determine the admixtures of meteoritic components in these glasses. In addition, the available target rocks, which could be a source of moldavites or AAT, were also studied. The microstructures of the studied glasses mutually differ. This is due to a diversity of parent materials and different glass formation conditions occurring during a particular impact event. A new type of "composite splash-form" has been identified among the ZIS glasses, whose chemical composition does not fit into the previously defined groups of irghizites or basic "splash-forms". For...
|
|
|
Identification of membrane transporters involved in carbon flux in arbuscular mycorrhizal symbiosis
Konečný, Jan ; Kohout, Petr (referee)
Arbuscular mycorrhizal symbiosis is one of the oldest and still most common interactions. This relationship between small soil fungi and plant roots, especially herbs, is the subject of research with, among other things, a promising use in sustainable agriculture. However, intensive research is also taking place at the cellular and molecular level, as the exact mechanisms of functioning of this symbiosis are still shrouded in mystery. Understanding these processes is desirable not only in the boom of genetic engineering. A commonly used model organism for the research of plant symbioses is a smaller legume of the genus medick - Medicago truncatula. Using a microarray for all known M. truncatula genes and by comparing mycorrhizal and non-mycorrhizal plants, the author identified several genes that could participate in symbiosis and he wrote a thesis from these results. In a follow-up experiment with an intervention in plant physiology, the authors of the article (Konečný et al., 2019) point to the probable involvement of some previously unreported genes in symbiosis, but also to different modes of regulation in genes whose probable symbiotic function is already published. This rigorous thesis focuses on the introduction of the first-author publication, a closer explanation of the experiment, which is not...
|
|
|
Zooplankton of Bohemian Forest lakes as indicator of recovery from acidity
Kohout, Leoš ; Fott, Jan (advisor) ; Macháček, Jiří (referee) ; Bitušík, Peter (referee)
CONCLUSIONS In my Ph.D. thesisthe ťollowingitems arediscussed It is hypothesisedthat Al govems the P availability in the acidified lakes, as well as shapesthe foodweb structure. Substantialportion of the plankton biomass in the Bohemian Forest lakes is createdby hetelotrophic fi|amentswhen filtering cladocerans aÍenot present (theyareextinctor occuÍseasonal1y). After ťrrstsigns in the nineties further evidence for the ongoing biological recovery was collected. Nevertheless, the lakes are still stongly or partially influenced by acidification and standardfood web relationshipshave not been restored. The significant hysteresisof biological recovery behind the reversal of lake chemistryin theBohemianForest and elsewherecould have severalreasons: - Isolationofremote headwaterlakes makestheprocessofzooplankton re- colonizationstochastic,theprobability being atleastfor somecnrstacean specieslow. The successdependson suitablevector ofpropagules and size of inoculum. - Strong invertebrate predation in some fishless lakes can cause abiological resistancepreventing from zooplankton recovery until fish retum. ln theBohemian Forest for instancethereaÍeknown populations of corixids in some lakes and numerousChaoborus larvae are observed from Laka Lake. - Currenthydrochemicalconditions are still hard for...
|
|
|
Trait ecology of arbuscular mycorrhizal fungi
Hudáková, Zuzana ; Kohout, Petr (advisor) ; Ponert, Jan (referee)
Arbuscular mycorrhiza is a type of mutualistic symbiosis between fungi of the Glomeromycota division and the roots of vascular plants, which is the most common kind of mycorrhiza in the world. It is based on the exchange of substances, where the mycorrhizal fungus provides the plant with mineral nutrition and protection against pathogens and stress, and its plant host returns its products of assimilation. The phylogenetic classification of the division is equivocal, and we recognise two views on their categorisation into taxonomic groups, according to the morphology of their spores or by molecular methods, which is based on the rDNA sequence. The aim of the work is to characterise the influence of different taxa of the Glomeromycota division on the host based on their spores and the type of mycelium they prefer to form. This also affects the possibilities of the fungus, by which it can influence the life of the host plant. Key words: arbuscular mycorrhiza, arbuscular mycorrhizal fungi, Glomeromycota, spores, intraradical mycelium, extraradical mycelium, functional traits
|
|
|
DLMS security suite implementation
Kohout, David ; Sláčik, Ján (referee) ; Mlýnek, Petr (advisor)
This thesis is focused on smart meters cyber security using DLMS Security Suite standard. Security is more important every day and DLMS specifies multiple methods of authentication and message encryption which is defined in Security Suites. For message creation there are multiple possible formats that can be used. For a better understanding all formats are analysed and compared using a specific example. Main part of this work is about making a testing application called VUT DLMS Tester which is used for testing this standard for real usage in distribution network. Whole development is cooperated with distribution companies and smart meter manufacturers. Application also implements higher levels of security which DLMS specifies. This application is used for testing multiple scenarios regarding security impact on data volume.
|
|
|
Biotic threats to garden monuments: algae, cyanobacteria and invasive plant species
Pergl, Jan ; Perglová, Irena ; Albrechtová, J. ; Antl, Tomáš ; Abarenkov, K. ; Baldrian, Petr ; Cihlářová, L. ; Klečka, Jan ; Kohout, Petr ; Kvasničková, Jana ; Maršálek, Blahoslav ; Maršálková, Eliška ; Pejchal, Miloš ; Petružálková, M. ; Petřík, Petr ; Pyšek, Petr ; Sádlo, Jiří ; Štefl, Lukáš ; Tedersoo, L. ; Větrovský, T. ; Vlk, Lukáš ; Vojík, Martin ; Vosátka, Miroslav ; Zezulka, Štěpán
Chateau, city parks and gardens are perceived as harmonious parts of the landscape. Unfortunately, even these areas have to face various threats, and they can be a threat to the surrounding environment. The exhibition /catalogue presents a look at the organisms that threaten parks. These threats cover unwelcomed invaders covering invasive plants and small microorganisms in the soil, on facades, statues or in water. On the other hand, some species that are intentionally brought to the parks can be risky not only the gardens themselves but also their surroundings.
Fulltext:  PDF
|
guest ::
RSS feed.