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Biological and mechanical properties of titanium implant covered with hydroxyapatite and zirconia layers and the approach to the immediate loading of dental implants
Teuberová, Zuzana ; Dostálová, Taťjána (advisor) ; Racek, Jaroslav (referee) ; Jelínková, Helena (referee)
Dental implantology is a branch, which has started a rapid evolution over the last years. All of the experts dealing with implantation are focused on extending indications for the application of the used materials to reduce the time period of therapy. Coating of the implants is a possible way how to treat patients in a shorter time period with the similar results as following the classical Bránemark protocol.Hydroxyapatite is one of the most attractive materials for human hard tissue implants because of its close resemblance to the bone and the teeth. Its positive influence on the healing process called osseointegration is obvious. Hydroxyapatite is of a brittle nature and limits the applications as the main solid material for the dental implants. Zirconia ceramics have several advantages such as the high strength and it is frequently used to reinforce other ceramics. The concept of adding zirconia as the second phase to hydroxyapatite significantly increased the bonding strenght.In the dissertation pulsed laser deposition is shown as one of the coating method. The bioceramic zirconia samples were characterized by methods for thin solid film analysis such as X-ray diffraction, morfology investigation by electrone microscope and measurement of the film thickness. Afterwards we examined the mechanical...
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Scanning thermal microscopy of thermoelectric pulsed laser deposited nanostructures
Vaniš, Jan ; Zelinka, Jiří ; Zeipl, Radek ; Jelínek, Miroslav ; Kocourek, Tomáš ; Remsa, Jan ; Navrátil, Jiří
New materials with high possible figure of merit ZT are of high interest as a promising candidates for thermoelectric applications such as energy harvesting. Miniaturization of such systems tends toward developing of the suitable characterization method with nanometer resolution ability. In our contribution, we present the development and experimental results of a simple scanning probe microscopy method for the relative thermal conductivity characterization. The possibility of the setup is demonstrated on the set of different thin thermoelectric layers grown from hot pressed targets by pulsed laser deposition on the reference Si substrate. All the measurements were performed on the commercial Veeco Multimode scanning AFM/STM microscope with home developed controller and by using PicoCal Inc. bolometer probes with tungsten resistive path. All the experiments were done in the air at the ambient condition. Additional sample treatment for the measurement will be also briefly described
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Calculations of nanocrystalline diamond-covered waveguides based on amorphous silicon
Jirásek, Vít ; Prajzler, Václav ; Remeš, Zdeněk
Nanocrystalline diamond (NCD) coatings on planar waveguides (WG) in the IR region allow to design optical sensors sensitive to absorbers like proteins or other biomolecules. In this contribution, we present a 2D model of a multi-layer WG developed under FEM (finite element method) simulation software Comsol Multiphysics. The model is based on the modified wave equation solved in the frequency domain and includes optical absorption. It was found that for the single-mode WG working in the narrow region of 1550-2000 nm the silicon thickness must be 150-320 nm. It was found that in order to keep a reasonable signal attenuation, the NCD film must be prepared with the optical absorption coefficient lower than 10 cm-1, being a rather challenging task. Dependencies of the signal attenuation on the NCD film thickness, absorbing layer height, its absorption coefficient and exciting wavelengths are presented.\n
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Czech Terra - adaptace uhlíkových deponií v krajině v kontextu globální změny
Ústav pro hospodářskou úpravu lesů Brandýs na Labem, pobočka Frýdek-Místek (UHUL) ; Mendelova zemědělská a lesnická univerzita v Brně, Brno ; IFER - Ústav pro výzkum lesních ekosystémů, s.r.o., Strašice ; Ústav systémové biologie a ekologie AV ČR, v. v. i., České Budějovice ; Černý, Martin ; Cudlín, Pavel ; Urban, Otmar
CzechTerra představuje integrační projekt řešící problematiku studia adaptace krajinných celků ČR – ekosystémů - na probíhající globální změnu klimatu (GZ) s využitím metodických přístupů umožňujících pochopit, predikovat a oceňovat probíhající změny v regionálním měřítku a v kontextu Rámcové úmluvy a Kjótského protokolu. Projekt je realizován ve třech pracovních sekcích. PS1 - Adaptační strategie ekosystémů ČR k probíhající GZ - výzkum zaměřený na analýzy adaptačních změn, časové trajektorie těchto změn řešených na úrovni ekofyziologie produkčního procesu. Studium odezvy asimilačního aparátu dřevin na působení zvýšené koncentrace CO2. Studium dynamiky toků uhlíku pomocí eddy-kovariační techniky. Identifikace potenciálních rizik způsobených dlouhodobým pěstováním smrkových monkultur. PS2 - Stresová rizika lesních ekosystémů spojená s adaptačními změnami způsobenými GZ - zhodnocení dopadů změn ve využívání krajiny na stav biologické rozmanitosti ČR. Studium adaptačních mechanismů lesních porostů s převahou smrku ztepilého na faktory globální environmentální změny. PS3 - Rozvoj dynamické observační sítě o stavu, vývoji ekosystémů a využití krajiny ČR - vytvoření efektivního informačního systému, který by byl využitelný pro široké potřeby hodnocení a trvalého sledování vývoje terestrickckých ekosytémů a využívání území na celorepublikové úrovni. Systém bude představovat základní nástroj pro hodnocení a strategické plánování ochrany a udržitelného rozvoje krajiny v České republice.
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Multiscale design of advanced materials
Král, L. ; Million, Bořivoj
In this paper, the results of measurements of chemical diffusion of Mn in steel weldments are reported. Chemical concetnration of Mn an interval 0-15 wt.% Mn was varied. Alloys were casted in induction furnace under protective Ar atmosphere. Diffusion couples were annealed at 800-1100°C for 96-1.5 hours respectively. Measurement of Mn redistribution was done in a normal direction to welding interface using scanning electron microscope Philips SEM-505WDS equipped with Microspec WDX-2A. Diffusion coefficients of Mn were obtained by fitting experimental curves to the known analytical solution.
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Hard-coupled model of local direct resistance heating of thin sheets
Karban, P. ; Mach, F. ; Doležel, Ivo
A monolithic model of local direct resistance heating of thin sheets is presented. The model respects all nonlinearities of the system such as the temperature dependencies of physical properties of individual parts of the system. Numerical computations are performed by a finite element method of higher order of accuracy and realized by our own codes Hermes2D and Agros2D. The methodology is illustrated by a typical example whose results are discussed.
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Rovné příležitosti mužů a žen ve vybrané organizaci
Příhodová, Petra
The bachelor thesis is focused on the issue of equal opportunities for men and women at the Municipal Office Šternberk. It focuses on the views of individual employees to equal opportunities. The theoretical part deals with legislation, the definitions of basic concepts such as equality and discrimination, gender and gender stereotypes, strategies promoting equal opportunities (gender mainstreaming, gender analysis, gender budgeting and gender audit). The bachelor thesis is also interested in the issue of selection process, career growth coupled with a glass ceiling barrier, segregation of the job market depending on the pay gap between men and women and the reconciliation of private and professional life. The practical part analyzes the representation of men and women in various positions. The study of internal documents was found representation of men and women in different positions. Subsequently, the data were processed into graphs and diagrams. Performing semi-structured interviews with employees of the Municipal Office Šternberk various positions, was determined attitude of staff to equal opportunities for men and women. Interviews were transcribed and on the basis of their results were made conclusions on the matter.
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