Směrová krystalizace eutektika Ti-Al-Si
Results of directional solidification experiments with eutectic alloys composed of matrix and silicide particles. It is shown that the matrix is more affected by directional solidification than silicides.
Materials Literature
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Optical and magneto-optical properties of magnetic oxides
In the present experimental work we study Faraday rotation (FR) and magnetic circular dichroism (MCD) spectra of thin films of a) RF sputtered copper ferrites stabilized by the post-deposition heat treatment in two different crystallographic structures (tetragonal and cubic), b) bismuth and galium substitued iron garn…
Profiling of N-Type Dopants in Silicon Based Structures
We have focused on variously doped n-type pattems on a lightly doped p-type substrate because of lack of data for these structures. We have designed and prepared planar structures of this kind at the university clean room. Combination of the UHV SEM and PEEM microscooes should facilitate possible quantifying of the th…
Sorts and functions of clothes for outdoor sports
This thesis is focused on sorts and functions clothes for outdoor sports. The attention is paid to layering system of clothing and used materials {--} serving manufacture of clothing.
Fish in the educational area Humans and Their World
The aim of this graduation thesis is to analyze of the nature curriculum and to prepare suggested activities, which deepen the subject matter of fish with suitable enquiring to scientifically oriented subjects on the first level (first of all science). For processing this topic of the graduation theses were preparing…
History and developement of bassoon reed
History and development of bassoon reeds is a main topic of this thesis.The material, Arundo Donax cane hasthe key importance for the construction and and fiction of reeds.Relationship Between biological, chemical and physical feature sof Arundo Donax on one side and qualities desired for the proper fiction of reed on…
The Simulation of impact test on R7T steel
Charpy impact is dynamic experiment that we detect material behaviour under high loading rates. Charpy impact test is used as method for brittle farcture characterization. In this work material model based on Johnson – Cook equations was used for prediction of the dynamic behaviour of the experimental material. Compar…
Vliv viskoelastických vlastností mezifázového rozhraní na oscilace bubliny
Shape oscillations of bubbles in surfactant solutions are investigated by means of high-speed imaging. Two cases are studied: bubbles attached to a capillary tip, and bubbles freely rising after detachment. The frequency f and the decay time τ of shape oscillations are evaluated, and their dependence on the surfactant…
Resistance saw
This work is focused on the design and construction of component parts of resistance saw. Mechanical parts consist of a movable bracket and a taut cutting wire of Constantan. Electrical parts are designed to supply and control temperature of the cutting wire. The current intensity in the cutting wire is compared with…
An influence of prestress by combined random loading
The contribution deals with findings concerning an influence of static load in combination with random dynamic torgue on fatigue life of tube specimens made out of the steel ČSN 411523.1. A generalized formula has been found for fatigue life expressed in a number of loading blocks of torgue process as a function of it…
The alternative stationary phases in HPLC analysis of drugs
Rigorous thesis The Alternative HPLC Phases for Analysis of Pharmaceuticals Mgr. Petra Holásková Charles Univerzity in Prague, Faculty of Pharmacy in Hradec Králové, Department of Pharmaceutical Chemistry and Drug Control The solubility of silica gel at high pH is the cause for developing alternative HPLC columns base…
Výpočetní analýza potenciálu kavitační eroze v hydraulickém stroji
The paper describes a new model for efficient modeling of water cavitation erosion potential in turbulent cavitating flow. The number and size of the cavitation nuclei in the inlet flow are predicted empirically or experimentally using the acoustic spectrometer. The bubble dynamics is described using the Rayleigh-Ples…
Mekaniske vækstreguleringmetoder og naturligt auxin
Udgivelsesdato: September
Deriváty oxidované celulozy
The reactivity of Na and salt of oxidized cellulose and its oligosaccharides with chitosan will be presented. Hydrolysis of Na and salts of oxidized cellulose was carried out in homogenous system by means with microwave irradiation at constant conditions. The reaction progress was monitored by capillary isotachophores…
Selected Elementary Phenomena in the Beer Foam
This work contains a brief summary of the theoretical knowledge of the physics of foam. The practicalities, I studied the impact of positive (protein) and negative (salts) surfactant on the bubble terminal velocity and bubble coalescence time with surface.
Homogenní nukleace vody v difúzní komoře s laminárním tokem
Homogeneous nucleation rates of water at temperature between 240 and 270 K were measured in a laminar flow diffusion chamber at ambient pressure and Helium as carrier gas. The experimental results extend the nucleation rate data from literature substantially. Using the macroscopic vapor pressure, density and surface t…
Developments strenght attained of the system metakaolinite – podium aluminite - quartz
/: Geopolymer reactions have much in common with diagenetic transformations of the sedimentary rocks. Inside of laboratory conditions occur of geopolymer masses in alkali reaction of metakaolinite to sodium aluminate (Fastex 81) and quartz. As a result reaction is rise the zeolite phase (zeolite A) inside of relevant…
Modelling of Local Plasmon Resonances
This Bachelor’s thesis is dedicated to plasmon resonance systems. The first part deals with the analytical and numerical description of behaviour of the surface plasmon polaritons in the edge proximity of metal antennas. The second part is devoted to the simulations of dispersion of light on Ga cap deposited on Si sub…
Study of Cobaltites and Manganites by NMR and EXAFS
This Thesis is devoted to a study of physical properties of manganites and cobaltites with perovskite structure. Combination of macroscopic (magnetization measurements and X-ray powder diraction) and microscopic (NMR and EXAFS) methods was applied in order to get a complex and detailed view on the charge and magnetic…
Dynamics of spin polarization in ferromagnetic semiconductors
This work was devoted to the measurement of magnetooptical effects in ferromagnetic semiconductors. We analyzed in detail the measurement technique based on a photoelastic modulator and we constructed an experimental setup that enables to measure the spectra of magnetic circular dichroism (MCD), magnetic circular bire…