Temperature field evolution in wood samples during the flame spread experiments

Vertical, horizontal and 45° upward fl ame spread experiments over the small scale beech and pine wood samples were performed. Wood samples were of two geometries - square cross section prisms (15 x 15 mm) and a thin rectangular cross section prisms (5 x 40 mm) - and of three different lengths - 10, 15 and 30 cm. Samples were ignited by a heptane source fi re extinguished immediately when the wood samples ignited. During the fl ame spread an internal temperature profi les along the centreline of the samples were measured by a set of thermocouples. Flame spread was observed in all sample positions except the horizontal orientation of the beech and pine square prism samples. Experimental data will serve for a validation of the pyrolysis models in the Computational Fluid Dynamics (CFD) fl ame spread model

Opakování pseudoslov u bilingvních dětí. Liší se výsledky ve srovnání s dětmi s vývojovou poruchou jazyka?

Tato práce se zabývá výkonem bilingvních dětí a dětí s vývojovou poruchou řeči v testech opakování pseudoslov. Předchozí výzkum ukázal podprůměrné výsledky jak u bilingvních dětí, tak dětí s vývojovou poruchou řeči. Opakování pseudoslov se běžně užívá jako diagnostický nástroj pro odhalení vývojové poruchy řeči u dětí. Metodou opakování pseudoslov je tak možné odhalit vývojovou poruchu řeči u bilingvních dětí jen s obtížemi. Tato práce se pokusí o hlubší analýzu výkonu bilingvních dětí a dětí s vývojovou poruchou řeči v běžně užívaném testu - The Children's Test of Nonword Repetition (CNRep). Prozkoumány byly tři skupiny dat. První skupinu tvořily monolingvní anglicky mluvící děti s diagnózou vývojové poruchy řeči. Druhá skupina sestávala z bilingvních dětí (čeština/angličtina), které se učí angličtinu od narození (tj. simultánně bilingvních). Třetí skupinu tvořily bilingvní děti (čeština/angličtina), které se začaly učit angličtinu po jednom roce života (tj. sekvenčně bilingvní). Položky testu CNRep byly rozděleny do kategorií a následně analyzovány. Byly vytvořeny dva modely pro statistickou analýzu. Pro první model byly položky rozděleny do čtyř kategorií na základě délky pseudoslova (2, 3, 4 a 5 slabičná pseudoslova). Pro druhý model byla 4 a 5 slabičná slova dále rozdělena na položky obsahující a...This study investigates the patterns in nonword repetition performance of children with a developmental language disorder and bilingual children. It has been shown by previous research that both children with developmental language disorder and bilingual children tend to perform poorly in nonword repetition tasks. As these tasks are one of the tools often used for diagnosing markers of DLD in young children, diagnosing bilinguals with DLD proves to be difficult, since both of the groups exhibit a poor performance. An analysis of the patterns found in NWR performance of bilingual children and children with DLD might shed more light onto the issue. The study focuses on analysing the performance in a widely used assessment task - The Children's Test of Nonword Repetition. Three samples of data were analysed. The first sample of data consisted of monolingual English-speaking children diagnosed with a developmental language disorder. The second sample of data consisted of Czech-English bilingual children from international schools in Prague who started acquiring English at the time of birth, i.e. simultaneous bilinguals. The third and final sample consisted of Czech- English bilingual children from international schools in Prague who started acquiring English after one year of age, i.e. sequential bilinguals....Ústav anglického jazyka a didaktikyDepartment of the English Language and ELT MethodologyFaculty of ArtsFilozofická fakult

Komparace románových postav a jejich realizace v muzikálu Bídníci

Katedra francouzského jazyka a literaturyFaculty of EducationPedagogická fakult

The use of optimization in fire development modeling, The use of optimization techniques for estimation of pyrolysis model input parameters

This paper deals with the use of the optimization techniques for obtaining the input parameters from the bench scale experimental data that are used for property based fire modeling. Two multidimensional optimization techniques - Genetic algorithm (GA) and Shuffled complex evolution (SCE) - are discussed. Their performance is compared based on the algorithms application to estimation of the material properties of one of the commonly used structural materials – wood

Mass transfer in the lower crust: Evidence for incipient melt assisted flow along grain boundaries in the deep arc granulites of Fiordland, New Zealand

Knowledge of mass transfer is critical in improving our understanding of crustal evolution, however mass transfer mechanisms are debated, especially in arc environments. The Pembroke Granulite is a gabbroic gneiss, passively exhumed from depths of >45 km from the arc root of Fiordland, New Zealand. Here, enstatite and diopside grains are replaced by coronas of pargasite and quartz, which may be asymmetric, recording hydration of the gabbroic gneiss. The coronas contain microstructures indicative of the former presence of melt, supported by pseudosection modeling consistent with the reaction having occurred near the solidus of the rock (630–710°C, 8.8–12.4 kbar). Homogeneous mineral chemistry in reaction products indicates an open system, despite limited metasomatism at the hand sample scale. We propose the partial replacement microstructures are a result of a reaction involving an externally derived hydrous, silicate melt and the relatively anhydrous, high-grade assemblage. Trace element mapping reveals a correlation between reaction microstructure development and bands of high-Sr plagioclase, recording pathways of the reactant melt along grain boundaries. Replacement microstructures record pathways of diffuse porous melt flow at a kilometer scale within the lower crust, which was assisted by small proportions of incipient melt providing a permeable network. This work recognizes melt flux through the lower crust in the absence of significant metasomatism, which may be more common than is currently recognized. As similar microstructures are found elsewhere within the exposed Fiordland lower crustal arc rocks, mass transfer of melt by diffuse porous flow may have fluxed an area >10,000 km2

Syn-deformational melt percolation through a high-pressure orthogneiss and the exhumation of a subducted continental wedge (Orlica-Śnieżnik Dome, NE Bohemian Massif)

High-pressure granitic orthogneiss of the south-eastern Orlica-Śnieżnik Dome (NE Bohemian Massif) shows relics of a shallow-dipping S1 foliation, reworked by upright F2 folds and a mostly pervasive N-S trending subvertical axial planar S2 foliation. Based on macroscopic observations, a gradual transition perpendicular to the subvertical S2 foliation from banded to schlieren and nebulitic orthogneiss was distinguished. All rock types comprise plagioclase, K-feldspar, quartz, white mica, biotite and garnet. The transition is characterized by increasing presence of interstitial phases along like-like grain boundaries and by progressive replacement of recrystallized K-feldspar grains by fine-grained myrmekite. These textural changes are characteristic for syn-deformational grain-scale melt percolation, which is in line with the observed enrichment of the rocks in incompatible elements such as REEs, Ba, Sr, and K, suggesting open-system behaviour with melt passing through the rocks. The P-T path deduced from the thermodynamic modelling indicates decompression from ~15−16 kbar and ~650-740 ºC to ~6 kbar and ~640 ºC. Melt was already present at the P-T peak conditions as indicated by the albitic composition of plagioclase in films, interstitial grains and in myrmekite. The variably re-equilibrated garnet suggests that melt content may have varied along the decompression path, involving successively both melt gain and loss. The 6-8 km wide zone of vertical foliation and migmatite textural gradients is interpreted as vertical crustal-scale channel where the grain-scale melt percolation was associated with horizontal shortening and vertical flow of partially molten crustal wedge en masse

Assessing solvency of the company Austin Detonator s.r.o. when asking for a bank credit

Obsahem této bakalářské práce je popis a posouzení bonity firmy Austim Detonator s.r.o. v letech 2002 - 2004, které je provedeno především na základě metod finanční analýzy. Podkladem pro vypracování byly informace čerpané z odborné literatury, internetových zdrojů a účetních výkazů. Cílem této práce je pokusit se navrhnout určitá doporučení při žádosti společnosti o bankovní úvěr.This bachelor thesis is about examination of creditworthiness of company Austin Detonator s.r.o. over the years 2002 - 2004, which is based above all on the financial analysis. All information for this work I got from specialist literature, internet sources, accounting statements and annual reports of a company. Main objective of this thesis are recommendation to the company at the request for a bank credit.Vyšší odborná škola ekonomickáobhájen

Interactions of Hydrogen Sulfide Releasing Enzymes in Porcine Oocytes during Meiotic Maturation

The reproductive biotechnologies currently represent a major scientific discipline based on a sufficient quantity of wholesome oocytes matured in vitro conditions to acquire permits for their effectiveness. The meiotic maturation is a complex process where a wide range of factors is involved in the regulation. One of these factors are small gaseous molecules, so-called gasotransmitters. These gases demonstrate number of physiological functions in the organism and the latest discovered gasotransmitter is hydrogen sulfide (H2S). The aim of this thesis was to test the hypothesis according to which there are enzymes present in porcine oocytes that produce H2S (CBS, CTH, 3-MPST), their distribution is in interaction and their joint actions influence the process of the meiotic maturation. The resulting data were obtained on the basis of immunocytochemical staining and colocalization analysis. The results proofed the presence of H2S-releasing enzymes in porcine oocytes. It was also confirmed the function of these enzymes in relation to the regulation of the meiotic maturation when oocytes cultured with triple inhibitors of H2S-releasing enzymes matured more slowly. The results also showed medium correlation dependence of enzymes CBS, CTH and 3-MPST. The combination of CBS and 3-MPST resulted in high correlation dependence which confirmed their interaction both in immature oocytes and in vitro matured oocytes. It is evident that so far studied effects of H2S are only a fraction of skills which this signal molecule possesses. There exists a need for future experiments to help us describe and explain the acting mechanisms of H2S