Sequence of phase transformations in metastable ß Zr–12Nb alloy studied in situ by HEXRD and complementary techniques

Phase transformations in a metastable beta Zr–12Nb alloy were investigated by high-energy X-ray diffraction (HEXRD) measured simultaneously with thermal expansion in situ during linear heating from room temperature to 800 °C. Complementary in-situ methods of electrical resistance and differential scanning calorimetry, which were performed using the same heating conditions as in the HEXRD experiment, provided additional information on the transformation sequence occurring in the Zr–12Nb alloy. Two bcc phases with a different lattice parameter, ßZr and ßNb, were observed in the investigated temperature range and identified using the phase diagram of the Zr–Nb system. In the initial solution-treated condition, metastable ßZr phase and athermal ¿ particles are present in the material. At about 300 °C, Nb-rich ßNb phase starts to form in the material and the original ßZr phase gradually disappears. Ex-situ observations of the microstructure using transmission electron microscopy revealed a cuboidal shape of the ¿ particles, which is related to a relatively large misfit between the ¿ and ß phases. At 560 °C, ¿ solvus was observed, identified by an abrupt dissolution of ¿ particles which was followed by growth of the a phase.Peer ReviewedPostprint (published version

Tendecy in development of insurance markets, aproaches in insurance

Institut ekonomických studiíInstitute of Economic StudiesFakulta sociálních vědFaculty of Social Science

Statistické odhady a chvosty jejich rozdělení pravděpodobností

Master Thesis Statistical estimators and their tail behavior provides description of two type of characteristics of robustness of estimators - tail behavior and break- down point. Description is made for translation equivariant estimators in general and also for some concrete type of estimators, sample mean, sample median, trimmed mean, Huber estimator and Hodges Lehmann estimator. Tail behavior of these estimator is illustrated for random sample coming from t-distribution with 1 to 5 degrees of freedom. Ilustration is based on simulations made in Mathematica.

Statistické odhady a chvosty jejich rozdělení pravděpodobností

Master Thesis Statistical estimators and their tail behavior provides description of two type of characteristics of robustness of estimators - tail behavior and break- down point. Description is made for translation equivariant estimators in general and also for some concrete type of estimators, sample mean, sample median, trimmed mean, Huber estimator and Hodges Lehmann estimator. Tail behavior of these estimator is illustrated for random sample coming from t-distribution with 1 to 5 degrees of freedom. Ilustration is based on simulations made in Mathematica.

Analysis of Old-ahe pension schemes

Master Thesis Analysis of Old-age Pension Schemes provides comparison of pay-as-you-go system and funding pensions from the theoretical point of view. Comparison is made assuming constant population and population under demographic crisis as well. Next issue is a demographic development of the Czech republic. The thesis answers the question whether demographic crisis in the Czech republic occurs. The last part of the thesis analyses the current pension system of the Czech republic assuming analysed development of population growth

Úloha předpokladu linearity v Nashových hrách

Department of Probability and Mathematical StatisticsKatedra pravděpodobnosti a matematické statistikyFaculty of Mathematics and PhysicsMatematicko-fyzikální fakult

Importance of non-traditional investments for profesional and unprofesional investors

Cílem této bakalářské práce bylo porovnat výhody a nevýhody vybraných netradičních investic pro profesionální a neprofesionální investory. Na základě vybraných kritérií byly popsány investice do diamantů, vína, čaje a komiksů.The aim of the bachelor thesis was compare andvantages and disandavtages of choosen non-traditional investments for profesional and unprofesional investors. On basis of choosen criterions was desribed investment in diamond, wine, tea and comics.Fakulta ekonomicko-správn

Analysis of the written products of the pupils taughts by the analytic-syntetic method and the genetic method during the first grade

This diploma thesis is focused to the writing skills in an initiatory education of a literacy during the first grade at a primary school. The thesis is divided into the theoretical and the practical part. The theoretical part presents the genesis of the handwriting during the history, the physical and psychical expectations for the assumption of the writing skills, the methodics of two learning methods which are used in the czech education system most frequently and last but not least a list of the evaluated scales of handwriting. In the practical part we present the evaluation scale which were constructed for the purpose of this thesis. This scale monitors a plot of the written children's products, an error rate, an ability of corections and a graphical part. We kept at disposal about 500 written children's products which were collected from 22 classes from 9 schools from three parts of Czech Republic (Prague, Central and South Bohemian Region and Moravia). Children which were involved to the project, they were educated by the analytic-synthetic method or the genetic metod for the education of the literacy. The gained data was a part of the another project which were realized under the auspices of IPPP CR. The data was collected twice a one school year. Therefore we can observe a development of..

Tendecy in development of insurance markets, aproaches in insurance

Institut ekonomických studiíInstitute of Economic StudiesFakulta sociálních vědFaculty of Social Science