National Repository of Grey Literature 411 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Formal distinction between comitative and instrumental in contemporary Swedish
Čermák, Jan ; Zíková, Magdalena (advisor) ; Láznička, Michal (referee)
The aim of this bachelor thesis is to identify the degree of differentiation between the comitative and instrumental constructions in collocation with specific verbs in contemporary Swedish. Swedish marks both meanings syn cretically using the preposition med ("with"). There is a tendency to reinforce the comitative reading by adding the adverb tillsammans mea-ning "together", resulting in the construction tillsammans med ("together with"). The method of Distinctive Collexeme Analysis will be applied to a set of 200 verbs that collocate with both variants of the prepositional phrase, having them either as their arguments or as adjuncts. For each combination of a verb and a preposition, 50 complements of the preposi-tion with the highest tf-idf score (term frequency-inverse document frequency) will be selected and marked for animacy. The data comes from 146 Swedish corpora of various genres within Språkbanken. Relevant factors will be both the semantics of the verb and the animacy of the no-minal complement of med. It is assumed that some verbs with particular semantic features tend to prefer one prepositional phrase over the other. Should the tendency for the comitative meaning to be reinforced by ad-ding tillsammans be strong, that would point to a proces of grammaticali-zation in progress. Powered by...
Prosodic Phrasing in Good Speakers in English and Czech
Hledíková, Hana ; Skarnitzl, Radek (advisor) ; Čermák, Jan (referee)
The aim of this BA thesis was to compare prosodic phrasing in good public speakers of English and Czech. Naive observations of English and Czech spoken in everyday communication suggest that Czech intonation is more flat and that Czech speakers divide the flow of speech into longer prosodic phrases than English speakers. We focused on the speech of good public speakers to see whether there are differences in the temporal and melodic characteristics between the two languages in this stylistic domain. We analysed segments from speeches by 10 TEDTalk speakers in Czech and American English and measured the length of prosodic phrases, speaking rate, standard deviation of the fundamental frequency in each prosodic phrase and in the nuclear part of the phrase (measure of pitch span), and Cumulative Slope Index in each prosodic phrase (measure of melodic variability). The number of syllables per prosodic phrase was found to be higher in Czech than in English, although phrases were generally very short in both languages. Speaking rate was found to be faster in Czech than in English. Pitch span in both the whole prosodic phrase and the nuclear part of the phrase was found to be wider in English than in Czech. Melodic variability was found to be higher in English than Czech. These results show that there are...
Loss of Inflections in Updated Old English: the Noun Phrase in the Text of Nativitas Sanctae Mariae
Malcová, Markéta ; Čermák, Jan (advisor) ; Tichý, Ondřej (referee)
This work is concerned with the question of loss of inflections in the noun phrases of the Ælfrician homily De nativitate Sanctae Mariae (Nativitas Sanctae Mariae Virginis; Pseudo- Matthaei Evangelium). On the basis of collation of the manuscripts MS Hatton 114 and Bodley 343 a qualitative and quantitative analysis of the noun phrase is performed. The analysis aims to describe the main tendencies in the phonetic and morphological changes found in the text. The main tendencies of the morphological changes point toward the approach chosen by the scribe of the Updated manuscript Bodley 343 in dealing with the weakening case system. This includes unifying nouns which vary in gender affiliation in a single paradigm or the gradual implementation of new word endings with more narrowly defined meanings than ever before. The observed changes are placed in the context of the development from Old to Middle English.
Infinitival complements of the verb help in present-day spoken British English
Průšová, Karolína ; Malá, Markéta (advisor) ; Čermák, Jan (referee)
The thesis investigates the use of the bare infinitive and to-infinitive as a complement of the verb help in present-day spoken British English. It focuses on the frequency of each form of the infinitive and on factors influencing the choice between them. Material for the analysis is extracted from the corpus Spoken BNC2014. The theoretical part defines the infinitive, describes its forms and functions, and introduces different approaches to infinitival complements of help together with the studies concerned with them. The analysis consists of two parts. In the quantitative part the frequency of the construction ‚help + (NP) + bare infinitive' and ‚help + (NP) + to-infinitive' is determined. The qualitative part analyses these constructions in terms of factors influencing the choice of the infinitive form after help, as they were described in secondary literature. Except for the factors adopted from secondary literature, attention is paid to other features connected to the individual constructions. key words: complementation of the verb help, bare infinitive, to-infinitive, factors influencing the choice of the infinitive form, present-day spoken British English
HYDROGEN SORPTION IN ORDERED Mg-In ALLOYS
Čermák, Jiří ; Král, Lubomír ; Roupcová, Pavla
Hydrogen storage (HS) performance of three Mg- x In- y CB alloys (CB - amorphous carbon, x = 55, 64, 73 y =\n10 wt%) was studied. Indium concentration covered an area of ordered β structures. Alloys were prepared by\nball-milling in hydrogen atmosphere. Kinetic curves and PCT isotherms were measured in the temperature\ninterval from 200 °C to 325 °C. X-ray diffraction spectroscopy (XRD) was used for structure investigation. Alloy\nwith x = 73 wt% In ( β ’’ structure) showed reversible amorphization during temperature cycling between about\n100 °C and 350 °C. Hydrogen sorption experiments were done by the Sieverts method under the hydrogen\ngas pressure ranging from 0.1 MPa to 2.5 MPa. It was found that hydrogen sorption capacity varied between\n0.47 and 1.1 wt% H 2 . Hydride formation enthalpy ∆H calculated from desorption PCT experiments was\nsignificantly lower than ∆H , known for pure Mg. This invoked an idea that atomic order of Mg-based HS\nmaterials might decrease the high thermodynamic stability of hydride phase.
HYDROGEN STORAGE PROPERTIES OF GRAPHENE OXIDE MATERIALS PREPARED BY DIFFERENT WAYS
Král, Lubomír ; Čermák, Jiří ; Bytesnikova, Z.
Graphene-based materials show unique properties. These single layered materials consist of 2D structure of carbon atoms, belong to the strongest known materials, that are very mechanically flexible, optically transparent and that are excellent electrical and thermal conductors. Recently, several studies on these types of materials have highlighted the potential of this material for hydrogen storage (HS) and raised new hopes for the development of an effective solid-state HS media. In the present paper, the structure and HS properties of graphene oxide (GO) and chemically reduced graphene oxide (rGO) produced by different procedures were studied. Hydrogen sorption characteristics of GO and rGO were measured using the Sieverts-type gas sorption analyzer PCT-Pro Setaram Instrumentation. The study of HS was carried out at temperature range from 198 K to 423 K under hydrogen pressure from 1x10(-4) to 4 MPa. \n\nFor the HS point of view, the advantage of GO or rGO compared to graphene, is the presence of multiple chemical groups that can be used for introducing modifiers and their superior spreading on the materials surface. The suitably functionalized GO or rGO materials could potentially exhibit outstanding HS properties.
As in the Middle English Romance Sir Gawain and the Green Knight
Novotná, Alena ; Čermák, Jan (advisor) ; Tichý, Ondřej (referee)
This diploma thesis aims to classify the uses of as in the text of the Middle English romance Sir Gawain and the Green Knight from a formal and functional perspective. As has acquired a great number of functions through the process of grammaticalization. The theoretical part of the thesis firstly deals with the historical development of as from the Old English swā and ealswā. It then describes the uses of as in Middle English. In this period, as was found to function as an adverb, conjunction, preposition and a relative pronoun. Each of these uses can be further divided into a number of subtypes. The thesis subsequently summarizes the functions as can have in Present-Day English. The final sections of the theoretical overview briefly present the processes of grammaticalization and constructionalization, as these two processes have been instrumental in the development of as. The practical section is concerned with the analysis of all the instances of as in the chosen text. It classifies them and defines each type of use in more detail. The analysis also considers competing means of expressing the same function and comments on possible ambiguities. Furthermore, this section deals with the uses of as in the text from the perspective of their grammaticalization and also points out uses which are only...
HYDROGEN STORAGE PROPERTIES OF GRAPHENE OXIDE MATERIALS PREPARED BY DIFFERENT WAYS
Král, Lubomír ; Čermák, Jiří ; Bytesnikova, Z.
Graphene-based materials show unique properties. These single layered materials consist of 2D structure of carbon atoms, belong to the strongest known materials, that are very mechanically flexible, optically transparent and that are excellent electrical and thermal conductors. Recently, several studies on these types of materials have highlighted the potential of this material for hydrogen storage (HS) and raised new hopes for the development of an effective solid-state HS media. In the present paper, the structure and HS properties of graphene oxide (GO) and chemically reduced graphene oxide (rGO) produced by different procedures were studied. Hydrogen sorption characteristics of GO and rGO were measured using the Sieverts-type gas sorption analyzer PCT-Pro Setaram Instrumentation. The study of HS was carried out at temperature range from 198 K to 423 K under hydrogen pressure from 1x10(-4) to 4 MPa.
INFLUENCE OF GRAPHITE UPON THE KINETICS OF HYDROGEN SORPTION IN Mg@Mg17Al12
Čermák, Jiří ; Král, Lubomír ; Roupcová, Pavla
Influence of graphite addition to the ball-milling charge composed of Mg splinters and Mg17Al12 particles upon the hydrogen sorption was investigated at sorption temperature 623 K. Measurements were carried out by Sieverts method. Graphite facilitates the ball-milling: It prevents re-agglomeration of crushed particles into large secondary particles. It also suppresses sticking the milled material to the balls and walls of the milling jar. It was found that an increase of carbon concentration up to a certain limit c(L) lying between 14 and 23 wt. % C, carbon increases both the absorption and the desorption rates and hydrogen storage capacity. Above c(L), carbon causes a considerable decrease in HS capacity, which spoils the application potential of Mg@Mg17Al12/C. Crystallite size of the material under study, obtained by XRD, is in the order of tens of nm.
ESTIMATION OF EQUILIBRIUM HYDROGEN PRESSURE - A NEW METHOD
Čermák, Jiří ; Král, Lubomír
A new method is proposed to estimation of hydrogen pressure in equilibrium with hydride phase in a hydrogen\nstorage material. It is applicable both for hydrogen absorption and desorption in cases where the hydride phase\nis formed by nucleation and growth mechanism. The proposed method saves considerably the experimental\ntime replacing the conventional time consuming measurement of pressure-composition isotherms, the so\ncalled PCT curves. The proposed evaluation procedure is illustrated using hydrogen chemi-sorption at\ntemperatures 623 K, 573 K and 523 K in chosen hydrogen storage alloys Mg-Si-C, Mg-Li-C and Mg-Na-C.

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