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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
621

Jazykový management učitelů českého jazyka na středních školách a jejich podíl na utváření podoby spisovné češtiny / Language Management of Secondary Education Teachers of Czech and Their Contribution to Forming the Standard Czech

Olivová, Jana January 2012 (has links)
This thesis analysis in social practise the Language Management Theory - it deals with pedagogical activity of Czech language teachers at secondary schools, based on corrections of writen language tests. The goal of this paper was to find out whether the norm of czech standard language which is contained in codices correspond with the norm that is presented by teachers. This thesis uses modern metdological approaches from the sociolinguistic sphere, especially the method of so called 'Follow-Up Interview'. It also uses the concept of the Social Power Field by Ulrich Ammon and the Language Management Theory by J. V. Neustupný as general methodological basis. As the source of information served authentic tests which has been filled by fifty students of a secondary school a and then corrected by eight czech language teachers. Other sources were Follow-Up Interviews with the teachers and questionnaires. On the basis of these sources the Language Management Theory was researched and also the idea of the teachers about the norm of standard language. This idea was compared to the opinions of other three instances of the Social Power Field. In cases there was something unclear the information were completed from the Follow-Up Interviews. The research has proved that in the most cases the norm presented by teachers...
622

Nomádi vzdělávacího systému. Vícepřípadová studie transferů žáků základních škol / Nomads of Educational System. Multiple Case Study of School Mobility of Pupils

Vyhnálek, Jan January 2019 (has links)
Nomads of Educational System Multiple Case Study of School Mobility of Pupils Jan Vyhnálek Abstract The thesis explores school mobility - "students making nonpromotional school changes" (Rumberger, 2003), in the Czech Republic through qualitative multiple case study. It begins with a review of the most significant empirical studies in school mobility (1991-2016), highlighting a gap in research into the causes and processes of pupils' transitions and the need for qualitative research. To contribute to filling this gap, two cases of transfers following the transition from primary to lower secondary school and one case of attempts to integrate a child with cerebral palsy into mainstream schooling were explored as a "social and relational construction" (Zamora & Moforte, 2013, p. 59). The core of the thesis is an analysis of data based on in-depth, semi-structured interviews conducted with parents, pupils, teachers, school principals and external experts, field notes and documents providing three analytical narrations of these transitions. Rich use of data segments allows naturalistic generalisation. The analysis features the role of communication between school and family, the role of engaged parents, school tracking, school climate, social stigmatization of pupils and families, and stress on academic outcomes...
623

A framework for designing a modular muffler system by global optimization / Ett ramverk för att utforma ett modulärt ljuddämparsystem genom global optimering

Frithiof, Fredrik January 2015 (has links)
When creating a muffler to be installed on a noise generating machine, the design parameters as well as the placements of sound attenuating elements has to be optimized in order to minimize the sound coming out of the equipage. This is exemplified in a small project task for students of a basic course in optimization at KTH. The task is however flawed, since both the way in which the optimization problem is formed is overly simplistic and the algorithm used to solve the problem, fmincon, does not cope well with the mathematical complexity of the model, meaning it gets stuck in a local optimum that is not a global optimum. This thesis is about investigating how to solve both of these problems. The model is modified to combine several frequencies and adjusting them to the sensitivity to different frequencies in the human ear. By doing this, the objective is changed from the previous way of maximizing Dynamic Insertion Loss Dilfor a specific frequency to minimize the total perceived sound level LA.  The model is based on the modular design of TMM from four-pole theory. This divides the muffler into separate parts, with the sound attenuating elements being mathematically defined only by what T matrix it has. The element types to choose from are the Expansion Chamber, the Quarter Wave Resonator and the Helmholtz Resonator. The global optimization methods to choose from are Global Search, MultiStart, Genetic Algorithm, Pattern Search and Simulated Annealing. By combining the different types of sound attenuating elements in every way and solving each case with every global optimization method, the best combination to implement to the model is chosen. The choice is two Quarter Wave Resonators being solved by MultiStart, which provides satisfactory results. Further analysis is done to ensure the robustness of chosen implementation, which does not reveal any significant flaws. The purpose of this thesis is fulfilled. / När man skapar en ljuddämpare som ska installeras på en ljud-genererande maskin bör designparametrarna samt placeringarna av ljuddämpande element optimeras för att minimera ljudet som kommer ut ur ekipaget. Detta exemplifieras i en liten projektuppgift för studenter till en grundkurs i optimering på KTH. Uppgiften är dock bristfällig, eftersom både det sätt som optimeringsproblemet är utformat är alltför förenklat och den algoritm som används för att lösa problemet, fmincon, inte klarar av modellens matematiska komplexitet bra, vilket menas med att den fastnar i ett lokalt optimum som inte är ett globalt optimum. Detta examensarbete handlar om att undersöka hur man kan lösa båda dessa problem. Modellen är modifierad för att kombinera flera frekvenser och anpassa dem till känsligheten för olika frekvenser i det mänskliga örat. Genom att göra detta är målet ändrat från det tidigare sättet att maximera den dynamiska insatsisoleringen DIL för en specifik frekvens till att minimera den totala upplevda ljudnivån LA. Modellen bygger på den modulära designen av TMM från 4-polsteori. Detta delar upp ljuddämparen i separata delar, med ljuddämpande element som matematiskt endast definieras av vilken T matris de har. De elementtyper att välja mellan är expansionskammare, kvartsvågsresonator och Helmholtzresonator. De globala optimeringsmetoder att välja mellan är Global Search, MultiStart, Genetic Algorithm, Pattern Search och Simulated Annealing. Genom att kombinera de olika typerna av ljuddämpande element på alla sätt och lösa varje fall med varje global optimeringsmetod, blir den bästa kombinationen vald och implementerad i modellen. Valet är två kvartsvågsresonatorer som löses genom MultiStart, vilket ger tillfredsställande resultat. Ytterligare analyser görs för att säkerställa robustheten av den valda implementationen, som inte avslöjar några väsentliga brister. Syftet med detta examensarbete är uppfyllt.
624

Estetika okraja a hranice (K vybraným aspektom fenoménov okraja a hranice v slovenskej literatúre 20. storočia v stredoeurópskom kontexte) / Aesthetics of Periphery and Border (To Selected Aspects of Periphery and Border Phenomenon in Slovak Literature of the 20th Century in Central European Context).

Passia, Radoslav January 2012 (has links)
Radoslav P a s s i a Aesthetics of Periphery and Border (To Selected Aspects of Periphery and Border Phenomenon in Slovak Literature of the 20th Century in Central European Context) Abstract The dissertation deals with selected aspects of periphery and border phenomenon in Slovak literature of the 20th century in Central European context. In the preliminary chapter Border the author focuses particularly on selected texts by Central European writers which are thematically set in the Eastern Carpathians. This radically multiethnic region is considered to be one of the relatively independent cultural areas of Central Europe by the author. Narrative perspectives of a stranger, outcast, migrant in combination with the themes of border and conflict between vernacular and alien are characteristic for the literary image of the Eastern Carpathian border area in the 20th century. The author looks at the way the literary appearance of this area is ideologically deformed in the works of individual authors. The writers (mainly Czech and Polish) who do not come from the Eastern Carpathian border area use characters of strangers to reflect on the relationship between the modern and the traditional. Autochthonous authors often make use of the stranger characters to depict the area's self-colonial efforts in relation to the...
625

Literárne pole a literatúra v ranom povojnovom období na Taiwane (1945-1949) / Literary Field and Literature in Early Post-war Period Taiwan ( 1945-1949)

Dluhošová, Táňa January 2013 (has links)
Literary Field and Literature in Early Post-war Period Táiwān (1945-1949) Abstract The aim of this thesis is to analyze the literature and literary field of early post-war Táiwān (1945-49). This period, when Táiwān was politically reintegrated into China after 50 years as a Japanese colony, exerted a crucial influence on later historical events and developments. During these years, measures for the sinicization of Táiwānese society were implemented, but intellectuals also articulated views of distinctively Táiwānese as opposed to Mainland Chinese cultural features that were revivified by proponents of the Táiwānization (běntŭhuà) move- ment in the 1980s. As laid out in chapter 1, the methodology of the thesis is based on the theory of the literary field formulated by the French sociologist Pierre Bourdieu. The literary scene is understood as a structure created by relationships between various agents who aim to attain the dominant position in the field by accumulating the largest amount of symbolic capital. This is defined as prestige by Bourdieu but should be understood as a combination of prestige and political clout in the Táiwānese context, as this dissertation will argue. To occupy the do- minant position enables agents to define Táiwānese identity, culture, and literature (especially vis-à-vis China)....
626

Nevakuová přesná řešení / Exact solutions with matter fields

Kokoška, David January 2021 (has links)
In this thesis we investigate Robinson-Trautman solutions of Einstein's gravity cou- pled to a matter field in higher dimensions, specifically a conformally invariant and non- linear electromagnetic field. The latter possesses in general a non-zero energy-momentum tensor, which provides a source term in Einstein's equations. We focus concretely on an electromagnetic field aligned with the null vector field generating the expanding con- gruence of Robinson-Trautman spacetimes. At the beginning, we review the concept of optical scalars for a null vector field in higher dimensions and we use those to define the higher-dimensional Robinson-Trautman class of spacetimes. Next, we solve the corre- sponding Einstein's equations and present the complete family of exact solutions of the theory under consideration. We then contrast the obtained results with the known ones for the linear Maxwell theory in higher dimensions. As a check, we also compare our results to the well-known results in D = 4, since in this case our matter theory reduces to the standard linear Maxwell theory. Finally, we study properties of a subfamily of solutions which represent the static black holes within our class. In particular, we ana- lyze the asymptotic behaviour, we show that a curvature singularity is always present for r → 0 and the...
627

Tvorba digitální katastrální mapy v části katastrálního území Vilantice / Creation of a digital cadastral map in the cadastre unit Vilantice

Vacková, Eva January 2012 (has links)
The Aim of this master`s thesis was creation of a digital cadastral map in the part of cadastre unit Vilantice, in Chotěborky. There is an analog cadastral map scale 1:2 880 in the cadastre unit Vilantice currently. Review and completion of the positional point field was done by technology of global navigation satellite system and terrestrial methods. Result of this master`s thesis were the documentation of the review and completion of the positional point field, mapping sketches and vector file of a digital cadastral map.
628

Optimalizace parametrů sekundárního chlazení plynulého odlévání oceli / Optimization of Secondary Cooling Parameters of Continuous Steel Casting

Klimeš, Lubomír January 2014 (has links)
Continuous casting is a dominant production technology of steelmaking which is currently used for more that 95% of the world steel production. Mathematical modelling and optimal control of casting machine are crucial tasks in continuous steel casting which directly influence productivity and quality of produced steel, competitiveness of steelworks, safety of casting machine operation and its impact on the environment. This thesis concerns with the development and implementation of the numerical model of temperature field for continuously cast steel billets and its use for optimal control of the casting machine. The numerical model was developed and implemented in MATLAB. Due to computational demands the model was parallelized by means of the computation on graphics processing units NVIDIA with the computational architecture CUDA. Validation and verification of the model were performed with the use of operational data from Trinecke zelezarny steelworks. The model was then utilized as a part of the developed model-based predictive control system for the optimal control of dynamic situations in the casting machine operation. The behaviour of the developed control system was examined by means of dynamic model situations that have confirmed the ability of the implemented system to optimally control dynamic operations of the continuous casting machine. Both the numerical model of the temperature field and the model-based predictive control system have been implemented so that they can be modified for any casting machine and this allows for their prospective commercial applications.
629

Generátor otisků prstů / Fingerprints Generator

Chaloupka, Radek Unknown Date (has links)
Algorithms for fingerprints recognition are already known for long time and there is also an effort for their best optimization. This master's thesis is dealing with an opposite approach, where the fingerprints are not being recognized, but are generated on the minutiae position basis. Such algorithm is then free of the minutiae detection from image and enhancements of fingerprints. Results of this work are the synthetic images generated according to few given parameters, especially minutiae.
630

Digitální osciloskop na platformě FITkit / Digital Oscilloscope on FITkit Platform

Veškrna, Ondřej Unknown Date (has links)
This thesis deals with the design of a device that enables to monitor the behavior of the measured signal on the computer screen, using the principle of the digital oscilloscope. The control element of the device is the field programmable gate array (FPGA) on FITkit platform.  The FPGA configuration controls the input signal sampling and sends the received samples through the USB interface to the PC. The graphical application implemented in the computer tries to restore the signal and then displays it on the screen.

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