Climate impact on archaeological monuments in Prague Castle

This thesis deals with the question of the influence of climate on archaeological monuments beneath the pavement of the III. courtyard of Prague Castle. The complex archaeological site is threatened by the effects of several climatic factors, especially water and temperature changes, which cause weathering processes, and the historical building material in this area is subsequently degraded. The theoretical part of this thesis first deals with the study of historical building materials in the excavation area, with a focus on marlstone and clay slate, which are most susceptible to various types of weathering. Subsequently, degradation processes that affect the state of the present material are discussed, particularly processes related to water penetration through the material, chemical weathering caused by salt crystallization, and swelling of clay minerals, a process that often occurs in clay slate. The last chapter of the theoretical part outlines the impact of future climate change on the action of these processes. The practical part of this thesis focuses on research into frost and salt weathering cycles, particularly the determination of the frequency of cycles in one year of continuous measurement. Moisture and temperature values over time from sensors that are evenly distributed throughout...Tato práce se zabývá řešením otázky vlivu klimatu na archeologické památky pod dlažbou III. nádvoří Pražského hradu. Komplex archeologického naleziště je ohrožen působením několika klimatických faktorů, zejména vodou a změnami teploty, které způsobují vytváření zvětrávacích procesů a historický stavební materiál v zájmové oblasti je následně degradován. Teoretická část této práce se nejdříve zabývá studií historických stavebních materiálů v areálu vykopávek, hlavní důraz klade na opuku a jílovou břidlici, které jsou nejvíce náchylné k různým druhům zvětrávání. Následně jsou zde probírány degradační procesy, které ovlivňují stav přítomného materiálu, zejména pak procesy spojené s prostupem vody skrze materiál, chemické zvětrávání způsobené krystalizací soli a bobtnání jílových minerálů, proces, který se často vyskytuje u jílových břidlic. Poslední kapitola teoretické části nastiňuje vliv budoucí změny klimatických faktorů na působení těchto procesů. Praktická část této práce se zaměřuje na výzkum mrazových a solných zvětrávacích cyklů, zejména na stanovení četnosti cyklů za jeden rok kontinuálního měření. K tomu jsou využity vlhkostní a teplotní hodnoty v čase z čidel, která jsou rovnoměrně rozmístěna v celé oblasti vykopávek. Výsledky výzkumu prokázaly v současné době nepřítomnost procesu mrazového...Ústav hydrogeologie, inženýrské geologie a užité geofyzikyInstitute of Hydrogeology, Engineering Geology and Applied GeophysicsFaculty of SciencePřírodovědecká fakult

General ways for transformation aircraft jet engine to aeroderivative

Záměrem této bakalářské práce je popis obecných zásad transformace leteckého turbokompresorového motoru na aeroderivát. Součástí práce jsou elementární funkční principy a konstrukční provedení spalovacích turbín využívaných pro letecké aplikace. Na ně navazují stacionární pohonné jednotky určené pro produkci elektrické energie. Poslední kapitola práce uvádí samostatné transformační postupy při změně leteckého proudového motoru na aeroderivát.Purpose of these Bachelor thesis is to apprize the reader with the generals principles of transformation aircraft turbojet to aeroderivative. Part of the work are elementary functional principles and structural design of combustion turbine used for aircraft applications. They are connected to stationary power units designed to produce elektricity. The last chapter introduce separate transformation processes to change aircraft turbojet to aeroderivative.

Critical behavior in self-consistent conserving approximations of correlated electrons

We disclose a serious deficiency of the self-consistent conserving approximations of strongly correlated electron systems. There are two vertices, the divergence of each indicates a phase instability. We show that they generically display incomplete and mutually inconsistent critical behavior at different critical points. The dynamical vertex from the Schwinger-Dyson equation cannot be continued beyond its singularity since it does not obey the Ward identity and results in non-conserving response functions. The divergence in the conserving vertex, obeying the conservation laws, does not invoke a critical behavior of the spectral function and the specific heat. We demonstrate this ubiquitous ambiguity on an example of the single-impurity Anderson model. The dynamical vertex leads to strong coupling asymptotics with a logarithmic Kondo scale, while the conserving vertex results in magnetic instability of a spin-symmetric solution at a finite interaction strength.Comment: 5 pages, 2 figures, 1 Supplemental Materia

Toward a New Approach to Cross-Cultural Distinctiveness and Typicality of Human Faces: The Cross-Group Typicality/ Distinctiveness Metric

In the present research, we took advantage of geometric morphometrics to propose a data-driven method for estimating the individual degree of facial typicality/distinctiveness for cross-cultural (and other cross-group) comparisons. Looking like a stranger in one’s home culture may be somewhat stressful. The same facial appearance, however, might become advantageous within an outgroup population. To address this fit between facial appearance and cultural setting, we propose a simple measure of distinctiveness/typicality based on position of an individual along the axis connecting the facial averages of two populations under comparison. The more distant a face is from its ingroup population mean toward the outgroup mean the more distinct it is (vis-à-vis the ingroup) and the more it resembles the outgroup standards. We compared this new measure with an alternative measure based on distance from outgroup mean. The new measure showed stronger association with rated facial distinctiveness than distance from outgroup mean. Subsequently, we manipulated facial stimuli to reflect different levels of ingroup-outgroup distinctiveness and tested them in one of the target cultures. Perceivers were able to successfully distinguish outgroup from ingroup faces in a two-alternative forced-choice task. There was also some evidence that this task was harder when the two faces were closer along the axis connecting the facial averages from the two cultures. Future directions and potential applications of our proposed approach are discussed

The role of minority type preference in human sexual selection

Minority phenotype preference, or the negative frequency-dependent selection is a type of selection, where a feature is more preferred, the lower it's frequency is in the population. Even a weak effect in other-preference based sexual selection can result in a sustainable polymorphism. This study reviews the phenomenon in the context of human visual facial features. Common trends in attractiveness shape the morphology of the human face towards uniformity. Individual recognition however, as a condition for most social relations, uses the wast variability of different features. This variability could be formed and maintained by minority phenotype preference. In our study we tested the effect of minority phenotype preference in the selection for rare hair and eye colors. In 120 unique sets, each containing six photographs, we experimentally manipulated the frequency of each color type. These sets were then shown to 226 human raters. We tested whether the relative frequency of each color type affected the rating of individual stimuli. In hair color, significant effect of minority phenotype preference was detected when females rated the photographs of men. When males rated the photographs of females, the effect was significant in eye color only. Key words: face perception, sexual selection,..

Migration and Refactorization of Netfox Detective for .NET 5

Every second, there are many attempts to attack various entities on the Internet. This is why high-quality, fast, and up-to-date tools are needed to easily analyze network traffic. Netfox Detective is one of such tools. Specifically, it is used for forensic analysis of network communication. The aim of this work is to migrate Netfox Detective to the newest version of .NET platform (.NET 5), including refactoring with respect to user experience and correct use of software design patterns. This thesis deals not only with the migration itself, but is listing common mistakes programmers make along with possible solutions to these mistakes. The chapters contain a detailed decision log that can help guide other developers to better solutions. Furthermore, the work deals with analysis and creation of unit tests and with correct use of tools for CI/CD. Fully migrated project is not the only output of this thesis. A development environment for the project has been prepared in GitLab and it is ready to be used

Metadata Analysis of Cracking Password Task

Tato práce se zabývá návrhem a implementací analytického webového dashboardu pro aplikaci na vzdálenou správu systému Fitcrack. Tento systém slouží pro distribuovanou obnovu hesel. Administrace tohoto systému je jednostránková aplikace, která je rozdělena na serverovou a klientskou část. Tyto části spolu navzájem komunikují. Napříč systémem se vyskytuje mnoho informací, které jsou buď zaznamenávány do databáze pro pozdější analýzu, nebo zobrazovány v reálném čase uživateli. Ideálním zobrazením dat jsou grafické prvky nejrůznějších typů (šipka, graf, tabulka, čtvereček) a barev znázorňující, co a jakým způsobem se právě děje. This thesis deals with the design and implementation of the analytical web dashboard for remote administration of the Fitcrack system. This system is used for distributed password recovery. Web administration is a single-page application which is divided into a server and client part. These parts communicate with each other. There is a lot of information across the system that logged into a database for later analysis or displayed in real-time for the user. The best form to show data is a graphical element of various types (arrow, graph, table, square) and different colors showing what is happening.

Prague real estate market analyses with focus on apartment market

Cílem práce je komplexně zanalyzovat trh s nemovitostmi v Praze s detailem na bytový trh. Za použití tištěných a elektronických zdrojů nejprve v práci pojmenuji veškerá teoretická východiska, potřebná pro zdárnou analýzu realitního trhu. Samotná analýza je rozdělena do čtyř částí. Nejprve provedu dlouhodobou analýzu vývoje realitního trhu v porovnání s hospodářským cyklem od roku 2009. V druhé části se detailně zaměřím na roky 2016 a 2017 kdy se na trhu objevuje jev známý jako tzv. nákupní horečka a pojmenuji faktory, které tento jev způsobily. V závěru práce popíšu současný stav realitního trhu a na základě kvalitativních i kvantitativních predikcí odhadnu budoucí vývoj v dalších letech.The goal of the thesis is to do an analyses of real estate market in Prague with focus on the apartment market. Firstly, I will name the theoretical inputs that are necessary in order to make a comprehensive analyses of a real estate market. Analyses is separated into four parts. Firstly, I will analyse real estate market in Prague on long-term bases in connection with the economic cycle. Secondly, I will focus on years 2016 and 2017 which were the most critical ones in terms of Prague real estate market. I will look at the factors that caused so called “buying fever”. Finally, I will analyse Prague real estate market in presence and upon my qualitative and quantitative predictions I will make an estimation on how the market will perform in near future

Human mate preference of minority phenotypes: a case of freqency dependent sexual selection

Rare fenotype preference, a distinct type of sexual selection, has been studied on various species of Drosophilla and other invertebrates. There are independent clues, that a similar strategy could take part in mating among humans. This study summarizes related literature and discusses a possible role of minority type preference in maintaining a high value of hair and eye color variability and that of other facial characteristics in european population