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New kriteria for classification and differentiation between clay and iron oxide pigment sof various origins
Hradil, David ; Hradilová, J. ; Bezdička, Petr
Pigments containing iron, although they form a very large group, have never been considered very suitable for datation of color layers and identification of the origin of the painting, due to their abundant occurrence in nature, good availability and widespread use in all historical and pre-historical periods of time. In this paper we have verified that mineralogical composition of clay minerals in earthy pigments is a suitable tool for more detailed specification of material provenance and, in the case of ground layers, also the provenance of the artwork as such. It was obviously convenient to preferably use raw materials from a close and thus also cheaper source. For the purposes of statistical comparison we evaluated elemental composition of earthy grounds on 70 paintings from the 16(th)-18(th) centuries from Czech collections. We performed detailed mineralogical analyses for a selected representative number of grounds on 35 samples in total. We discerned 6 types of material in total 2 types of boles, 3 types of other earths, and one type representing iron-rich red from oxidized zones of hydrothermal ore deposits. We were able to distinguish between earthy pigments of Central European origin (coming from Czech and Bavarian locations) and those coming from North-Italian sources. Thus we were able to assign anonymous paintings to an appropriate place of origin.
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Historia S. Joannis Nepomuceni of 1729 and its period translations
Bočková, Alena ; Svatoš, Martin (advisor) ; Juríková, Erika (referee) ; Hojda, Zdeněk (referee)
Grounded by studie s of early modem Czech and Latin literature, this dissertation examines the work of a Jesuit historian Maximilianus Wietrowsky Historia S. Joannis Nepomuceni (1729) and its Czech translation Zpráva historická o životě sv. Jana Nepomuckého [Historical Report on the Life oj Saint John ojNepomuk] (1730). Apart from analysing both works from literary-historical, linguistic, stylistic and translational points of view, the thesis attempts to depict their wider cultural-historical context and to appreciate the important elements pertaining to the time ofthe works' birth and their content. In the introduction, the thesis is concemed with the question of authorship ofboth the Latin original and its Czech translation. After careful examination of a mostly manuscriptial body of sources, the author succeeded in finding grounds on which it is possible to assume that the author of the Latin version is indeed Maximilianus Wietrowsky (1660-1737), whose authorship has been indicated - without sufficient evidence - in historical literature. The analysis of the Czech translation, on the other hand, seems to disprove Wietrowsky's authorship of the Czech version.
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Jesus in the Koran; with Regards to Islamic As Well As Christian Traditions and the Person of Virgin Mary
Hemala, Jan ; Jandejsek, Petr (advisor) ; Lyčka, Milan (referee)
Different perception of the person of Jesus Christ remains to be among the most frequent and challenging questions of the dialogue between Christianity and Islam. Intention of this work is therefore to introduce at least basic elements of qur'ānic christology, i. e. the peculiar "word" of the Qur'ān about identity and mission of Jesus. It follows the fascinating process by which one religious tradition or culture adopted and assimilated the towering figure of another tradition and embraced it in its own conceptions of history of prophecy and of revelation from God. It further compares controversial attitudes of the Qur'ān (and let us say of Islam generally), such as refutation of Christian dogmas of the divinity of Jesus or the Holy Trinity, with creeds and statements of Christian christology; it devotes special attention to the person and story of Virgin Mary either. Within its explanation the work attempts to search out eventual origins or sources of the specific Islamic appreciation of Jesus, especially in Christian, canonical or apocryphal traditions. To emphasize the significance which is attributed to the mission of Jesus by Islamic orthodoxy and ordinary believers the essay refers also to the perspectives and narrations of later Islamic tradition which embellishes and elaborates qur'ānic indications...
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Clustering and regression analysis of micro panel data
Sobíšek, Lukáš ; Pecáková, Iva (advisor) ; Komárek, Arnošt (referee) ; Brabec, Marek (referee)
The main purpose of panel studies is to analyze changes in values of studied variables over time. In micro panel research, a large number of elements are periodically observed within the relatively short time period of just a few years. Moreover, the number of repeated measurements is small. This dissertation deals with contemporary approaches to the regression and the clustering analysis of micro panel data. One of the approaches to the micro panel analysis is to use multivariate statistical models originally designed for crosssectional data and modify them in order to take into account the within-subject correlation. The thesis summarizes available tools for the regression analysis of micro panel data. The known and currently used linear mixed effects models for a normally distributed dependent variable are recapitulated. Besides that, new approaches for analysis of a response variable with other than normal distribution are presented. These approaches include the generalized marginal linear model, the generalized linear mixed effects model and the Bayesian modelling approach. In addition to describing the aforementioned models, the paper also includes a brief overview of their implementation in the R software. The difficulty with the regression models adjusted for micro panel data is the ambiguity of their parameters estimation. This thesis proposes a way to improve the estimations through the cluster analysis. For this reason, the thesis also contains a description of methods of the cluster analysis of micro panel data. Because supply of the methods is limited, the main goal of this paper is to devise its own two-step approach for clustering micro panel data. In the first step, the panel data are transformed into a static form using a set of proposed characteristics of dynamics. These characteristics represent different features of time course of the observed variables. In the second step, the elements are clustered by conventional spatial clustering techniques (agglomerative clustering and the C-means partitioning). The clustering is based on a dissimilarity matrix of the values of clustering variables calculated in the first step. Another goal of this paper is to find out whether the suggested procedure leads to an improvement in quality of the regression models for this type of data. By means of a simulation study, the procedure drafted herein is compared to the procedure applied in the kml package of the R software, as well as to the clustering characteristics proposed by Urso (2004). The simulation study demonstrated better results of the proposed combination of clustering variables as compared to the other combinations currently used. A corresponding script written in the R-language represents another benefit of this paper. It is available on the attached CD and it can be used for analyses of readers own micro panel data.
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Building and use of smaller computer networks
Kyzivát, Marek ; Pinkas, Otakar (advisor) ; Šmejkal, Ivo (referee)
The thesis describes the initial state of the computer network Basic Schools and Kindergartens Ohradní (ZŠMŠ Ohradní) in Prague 4 and then its reconstruction, which I largely contributed. ZŠMŠ Ohradní consists of four pavilions and from one building on the other side of the street. The aim of this study is to assess the initial state of the network and point out the shortcomings that we discovered. We found deficiencies in the operation stress tests, measurements and data cabling overall analysis. Original networks connectivity was 100Mb/s. Together with a colleague, we are network administrators. Furthermore, I am going to introduce a new form of network, which has identified deficiencies improved, by using on newer technologies. I will describe its structure, address allocation, active and passive components, and operated services. New network is capable of 1Gb/s, and its spine is going to be 10Gb/s soon. Benefits of this reconstruction is faster, more stable and more modern network that will facilitate the work of employees of ZŠMŠ Ohradní. To these improvements, I have mainly contributed by measurements. I participated in the design and implementation of new form of data network. I collaborated with fellow Poc to the configuration of active elements and network services in reconstructed network.
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Design of polymerconcret frame of production machine
Lábus, Miroslav ; Pavlík, Jan (referee) ; Holub, Michal (advisor)
This work describes the construction of polymer - concrete frame of a machine tool. In particular it deals with the proposal of cast iron frame for the surface grinding machine BHP from the company KMS Brno, which should at all point replace the original cast iron frame of the same machine. The whole work is divided into two sections. First section consists of the research including a brief mention of the grinding technology in the reference to the construction of the frame of the grinding machine. Further the work deals with the theoretical knowledge regarding construction of frames of the machine. Finally it describes issues related to the technology of polymer – concrete and the production technology of parts from this material. Second section of the work consists of an engineering proposal of polymer – concreted frame considering the requirement of the main functional dimensions related from the structural measures. Subsequently the system approach and the principals for transition to the polymer – concrete construction of the grinding machine are made. The work concludes with the analysis and comparison of the two concepts (cast iron frame and polymer – concrete) in the terms of the Finite element method.
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Design of equipment for steam generation and superheating
Jakeš, Martin ; Gottvald, Jakub (referee) ; Nekvasil, Richard (advisor)
This thesis describes the design of a new circuit for the production of superheated steam instead of the original heat exchanger, which showed frequent failure. In the introduction is disassambling the problems of the existing heat exchanger and the proposed method of solving the problem. Proposed is a new process circuit consisting of a heat exchanger to heat the steam, separator and heat exchanger for superheated stream. Gradually, the work both heat exchangers are designed thermal and strenght. In the thermal part is modeled all process circuit and calculated in the program ChemCad. The strength calculation is solved analytically according to EN 13 445, then all dimensions of heat exchangers are optimized. In the conclusion is verified by metod of finite element critical part of the exchanger. After successful completion of the design thermal and strength calculation was made relevant drawing documentation.
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Computer Generated Holograms
Tvarog, Drahoslav ; Jákl, Petr (referee) ; Kotačka, Libor (advisor)
The presented Diploma thesis deals with the computer-generated diffractive structures or rather called computer generated holograms (CGH). We follow basic principles of classical holography and in the context of which we define a synthetic holography. We then show various types of digital holograms and methods of measurement of their quality. We deal with several iterative algorithms useful for computation of the Fourier transform as well as with methods of phase quantization. In the second part of the work, we describe briefly our computer code for iterative Fourier transform computation. With respect to the mentioned techniques, we further present the usability of the method for design of computer generated holograms in reflection regime. After a short introduction to the electron beam lithography and its exploitation for the origination of computer generated diffractive optical elements. We analyze reconstructions of produced holograms and evaluate its quality.
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Analysis of the bitter spirits category and the perception of the brand Becherovka Original in the czech market
Michelík, Martin ; Machek, Martin (advisor) ; Kolouchová, Daniela (referee)
The aim of the thesis is to analyse the bitter alcohol drinks market and to evaluate the brand image of the Becherovka Original on the Czech market and to suggest appropriate recommendations for improvements in perception of the brand amongst the younger generation of customers. The theoretical basis is defined to understand the terms as customer behavior, consumers buying process, brand elements, brand equity, brand value and brand image. In order to achieve the main objective the primary research was carried out. The research was provided by online customer survey. Based on the collected data the whole Czech alcohol market was analysed, with emphasis on the spirits market, especially on the bitter spirits category. Also, the brands marketing strategy was analysed. At last, the perception of the brand Becherovka Original on the Czech market was analysed. The data for the analysis were obtained by the theoretical basis and by the research. The conclusion contains suggested recommendations for the future prosperity of the brand.
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