National Repository of Grey Literature 251 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Microporous materials in organic chemistry (The influence of microporous catalyzers on the synthesis of N-alkylbenzamides)
Čermák, Jan
ČERMÁK, Jan. Microporous materials in organic chemistry (The influence of microporous catalyzers on the synthesis of N-alkylbenzamides). Hradec Králové: Pedagogical Faculty, University of Hradec Králové, 2009, 58 pp. Diploma thesis. The following diploma thesis deals the theme of synthesis of N- alkylbenzamides from benzoic acid and primary aliphatic amines. Amines react with benzoic acid, it leads to formation of quaternary ammonium salt, which dehydrates by heating up with formation of amide. Synthesis was made under the solvent free conditions in the microwave field. Above all there was tested the influence of microporous catalysts on the reaction of benzoic acid with hexylamine. Use of acid catalysts SiO2/H3PO4 and montmorillonite KSF had the positive influence on the studied reaction.
Development of modal verb "shall" in legal English
Kirakosyanová, Natali ; Tichý, Ondřej (advisor) ; Čermák, Jan (referee)
and key words This BA thesis focuses on examining the development of the use of the modal verb SHALL in legal documents in the English language. The modal verb SHALL still has its place in legal English and, as the manuals indicate, it can point to the precision of legal language. However, ambiguity is a rather undesirable phenomenon in legal language, and due to the growing number of legal documents and drafters, the meanings of modal verbs expanded over time, reducing the level of precision and opening the door to ambiguity. The BA thesis aims to analyse the development of the use of SHALL in court decisions in given time periods, further classify the samples based on semantics, as described by dictionaries of legal English, and point out the gradual growth in the use of certain meanings of the modal verb SHALL, possibly causing ambiguity in legal documents. To compare the development, and especially the frequency of use, the same method is used within the common language, which is analysed using non-legal corpora. Keywords: modal verbs, modality, shall, legal English, language change
Relationships between Old Norse adjectival borrowings and their Old English counterparts in Middle English
Müllerová, Světlana ; Čermák, Jan (advisor) ; Tichý, Ondřej (referee)
CHARLES UNIVERSITY - FACULTY OF ARTS DEPARTMENT OF ENGLISH LANGUAGE AND ELT METHODOLOGY Relationships between the borrowed Old Norse adjectives in English and their Old English counterparts MA THESIS Supervisor: prof. PhDr. Jan Čermák, CSc. Author: Světlana Müllerová Abstract: The aim of this MA thesis is to examine the relationship between six word pairs, each comprising an Old Norse adjectival borrowing in Middle English and its Old English counterpart along with its Middle English reflex for further reference. The inquiry into their relationship involves an analysis of: their (i) formal aspects, (ii) syntactic properties, (iii) semantic fields and (iv) external factors possibly contributing to their obsolescence or survival, such as the restriction to certain text types or geographic localization, as suggested by the individual linguistic profiles in the Linguistic Atlas of Early Middle English and Linguistic Atlas of Late Mediaeval English. The description of individual semantic fields of the given words is based on their semantic classification within the Historical Thesaurus of English. This analysis is based on the occurrences of the individual words as taken from the dictionaries Middle English Dictionary and Dictionary of Old English, and related corpora Dictionary of Old English Corpus and...
Evidence of Great Vowel Shift in English Poetry of the Period
Bartošová, Jana ; Tichý, Ondřej (advisor) ; Čermák, Jan (referee)
This BA thesis is dealing with the Great Vowel Shift which occurred roughly between the fifteenth and eighteenth century in British English. Analysis in this thesis was carried out manually on a sample of selected poetry of the period. While obtaining examples affected by the Great Vowel Shift other changes occurring approximately around the same period as the Great Vowel Shift such as shortening were taken into account. In the analysis it was observed that the number of representations of individual shifts is very different from each other. One specific shift was encountered widely in the works of all selected poets while another shift was not encountered once. The results of the manual analysis were displayed in graphs which were then compared to the presumed chronology of the Great Vowel Shift. Key words: The Great Vowel Shift, rhyme, poetry, Old English, Middle English, Modern English
Lexical Replacements of Romance Origins in Middle English
Buchal, Kryštof ; Tichý, Ondřej (advisor) ; Čermák, Jan (referee)
and key words This BA thesis focuses on selected words of French origin adopted into English during the Middle English period. The theoretical part deals with the research carried out in the field of French borrowings in the Middle English period so far. The research part focuses on lexical borrowings that replaced their corresponding equivalents of Germanic origin. The words were chosen from the Oxford English Dictionary, which also provided the information on etymology, various orthographic forms, current usage frequency and classification into semantic fields. The classification was used to find corresponding equivalents of French or Germanic origin. The list of orthographic variants of the words was verified and complemented with the Middle English Dictionary. Next, a corpus including English prose and verse from the period between 1150 and 1500 was used to analyze the usage and changes in the usage frequency of the replacements and the replaced words throughout this period. Key words: lexical replacements, French borrowings, Romance borrowings, Middle English
Lubrication of plastic gears
Hartl, Petr ; Čermák, Jan (referee) ; Křupka, Jiří (advisor)
The work deals with the process of lubrication of gears from a combination of materials that have significantly different material properties. The experimental measurement is performed on a tribometer in simulated gear contact with a ball-disk configuration. The Chromatic Optical Interferometry method is used to measure the formation of a lubricating film in contact. The purpose of this work is to clarify the process of film thickness formation and compare experimental measurements with predictions, which are valid in Soft EHL regime.
Development of method for lubrication regime evaluation in rolling bearing
Valenta, Jakub ; Čermák, Jan (referee) ; Šperka, Petr (advisor)
The aim of this master’s thesis is to develop measuring methods for evaluation of the lubrication regime in a rolling bearing. The first part of thesis maps several measuring methods according to which the lubrication mode can be evaluated. Based on the assessment of this part, electrical monitoring methods were selected. For application of these methods was constructed testing device with rolling bearing. Specific measuring chains based on selected methods were designed and verified by using initial tests on a ball-on-disk tribometer. According to the results of these initial measurements was selected and applied suitable measuring chain to the selected test device. In the end, there was a successful measuring the lubrication parameter on the rolling bearing. Additionally, other tests dealing with the influence of temperature and type of oil on the measurement itself were performed.
Stability of Time Delay Feedback Controls of Dynamical Systems
Lovas, David ; Tomášek, Petr (referee) ; Čermák, Jan (advisor)
Tato diplomová práce pojednává o stabilitě zpětně-vazebných řízení dynamických systémů s časovým zpozděním, speciálně řízení mechanických oscilátorů. Dva základní druhy řízení jsou užity v lineárních systémech. Dále je zde ukázána synchronizace dvouprvkových systémů užitím zpětně-vazebných řízení. Práce se také zabývá funkcí v MATLABu pro řešení zpožděných diferenciálních rovnic.
Lotka-Volterra competition model on graphs
Skácelová, Radka ; Šremr, Jiří (referee) ; Čermák, Jan (advisor)
This bachelor thesis analyzes several mathematical models describing the co-existence of two species, especially the classic Lotka-Volterra model and its extensions. These models are described by a system of non-linear differential equations. The goal of this thesis is to develop an extended predator-prey model using the graph theory, to find stationary states of this model and to analyze their stability. The thesis is furthermore focused on a comparison between the obtained results for this model with the existing results for the competition model on graphs.

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