|
|
Synthesis of bioceramic materials based on hydroxyapatite
Kočicová, Pavla ; Králová, Marcela (referee) ; Částková, Klára (advisor)
The thesis deals with the precipitation synthesis of nanoparticle hydroxyapatite with goal to study the influence of reaction conditions on the morphology of the particles. The theoretical part is focused on biomaterials, bioceramics and phosphates characterization. Further the work is focused on hydroxyapatite, its characteristics and possible synthesis in particular. The synthesis of hydroxyapatite precipitation is described in the experimental part. Syntheses were performed at a reaction temperature of 0-80 °C at pH = 8-11, at the aging time of 0-24 h, in the presence of surfactant and the chelating agent and with the post-precipitation hydrothermal or ultrasonic treatment. For characterization of the prepared powders, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), laser diffraction (LD) and the analysis of the specific surface area (BET) were used. Pure hydroxyapatite powders or a mixture of hydroxyapatite and tricalcium phosphate were prepared by precipitation syntheses. HA particle morphology was strongly affected by the reaction temperature – with increasing temperature the larger particles with a clearer morphology were formed, mostly in the rod shape. Postprecipitation hydrothermal treatment had a significant influence on the morphology of HA particles – it caused the formation of spherical or slightly elongated particles. The reaction medium of water/ethanol significantly affected the particle morphology – it inhibited the particle growth.
|
|
|
Influence of filters on running of metal flow
Makalouš, Jakub ; Veverka, Aleš (referee) ; Roučka, Jaromír (advisor)
This study deals with influence of filters on running of aluminum metal flow. The main objective was to describe hydraulic resistances of assorted filters and running of silting filters by inclusions. Theoretical part generally describes filtration process and also filtration from the point of view of aluminum alloys and the most important characteristics of each type of alumina inclusions. Experimental part deals with flow rate tests, influence of filters on gassiness of melt and metallographic analysis. It was find out, that filter GEPHAL made minimal hydraulic resistance, on the other hand ceramic foam filters type LD made the maximal hydraulic resistance. It is necessary to reduce filtration surface for study running of silting filters by inclusions. Metallographic analysis showed amorphous alumina film inclusions, spinell Al2O3.2MgO, sludge and carbide of silicon.
|
|
| |
|
|
Design of semiconductor optical amplifier
Somora, Rastislav ; Hanák, Pavel (referee) ; Slavíček, Karel (advisor)
Diploma thesis deals with the construction of a moder semiconductor optical amplifier SOA. In the first chapter optical comunication and the use of optical amplifiers is described. In the next chapter some types of optical fibers, their chemical composition and properties are described in detail. The third chapter overviews optical amplifiers, their use today, describes their advantages and disadvantages and their proper use in optical comunications. The fourth chapter describes the solution of the objective, the right layout of separate blocks and connections used in measurements. Fifth chapter describes used components, describes their basic parameters and proper use in circuit. The last chapter evaluates outputs of measurements and their impact on the objective.
|
|
|
Optical transmitter design
Vraspír, Marek ; Křivák, Petr (referee) ; Hudcová, Lucie (advisor)
This work dissert on proposal of optical ampifier excitor for transmission of information using optical enviroment. For proposition was chosen suitable transmission enviroment and LD diode that is used in optical communications. Accent was put at universal using of diode. Than was solved the modulation of input signal, it is used the „on-off“ keying, which is proceeded by integrated circuit, which is designed for none extreme transmission speeds. The work contains the solution of the potection of electrical circuit and LD diode against high current and thermal influences in transmitter.
|
|
|
Detached House with Stained Glass Studio
Ruszová, Veronika ; Blažek, Petr (referee) ; Fišarová, Zuzana (advisor)
The bachelor thesis focuses on a family house and a workshop.The family house is designed as a new two-floor building without a cellar. The workshop is designed as a new one-floor building without cellar. The buildings will be placed on foundational zones with additional foundational panel. Perimeter supporting and inner supporting walls are constituted by sand-lime bricks SENDWIX 8DF-LD. Ceiling ceramic construction KMB MIAKO is used above the whole first floor. Above the second floor is the roof construction made up from wooden tie beams G-N, which serve as ceiling as well. The roof of the workshop is made from wooden tie beams G-N. The staircase leading from the first to the second floor is made out of reinforced concrete.
|
|
|
Analysis of visit rate of internet presentation of LD Ekonom
Samec, Matěj ; Novák, Michal (advisor) ; Přibil, Jiří (referee)
The following thesis is going to focus on online presentation of company called LD Ekonom. It will provide in-depth analysis of two media channels which the company uses at the moment. First channel is a website www.ldekonom.cz, data from which I will inspect using Google Analytics. In this case I will mostly explore traffic results and user behaviour during their online presence. Second media channel is page which resides at social network Facebook www.facebook.com/LDekonom. Data for the second analysis are going to be retrieved directly from companys official page. In this case I will be working mostly with posts reach, user reactions to official posts and impact of paid adverts. Following will be comparison of both media channels and rating of their importance for companys well-being. Result of my bachelors thesis will be recommendations according to the outcome of above mentioned ratings which will uncover whether they are worth investing into or not.
|
|
|
Catering department of the spa hotel LD Palace in Frantiskovy Lazne
Eisenreich, Jindřich ; Valentová, Jana (advisor) ; Dragula, Ladislav (referee)
My bachelor thesis deals with operations of the catering department of the spa hotel LD Palace in Frantiskovy Lazne. The thesis is divided into two separate parts. In the first section, there are explanations of necessary theoretical terms in relation to catering industry. The practical segment of the thesis details and analyzes operational processes of the catering department of LD Palace. With regards to results obtained through independent survey, structural changes were suggested that would create positive feedback of LD Palace's clients.
|
|
|
Facors Reviatalization of Brownfields in the Czech Republic
Osman, Robert ; Frantál, Bohumil ; Kunc, Josef ; Klusáček, Petr ; Martinát, Stanislav
The paper deals with reuse of brownfields in the Czech Republic. Based on the analysis of information about re - use of residual spaces are shown major changes in the current management space. The paper is based on a comparison of two data files - specifically, the existing brownfields database managed by the CzechInvest and own database of brownfields that have a lready been revitalized. The paper is divided into three parts, the first part of the paper analyzes the structure of a revitalized brownfields, in the second part of the paper, the structure of this file is compared with the structure of existing brownfie lds and the third part analyzes the factors revitalization of brownfields. The paper aims to answer the question what functions take the brownfields after revitalization and what factors determine their reuse.
|
|
|
The proposal to use agile development procedures of Scrum framework with UML modeling language applicable for creating websites
Kučera, Antonín ; Oškrdal, Václav (advisor) ; Luc, Ladislav (referee)
The main goal of this diploma thesis is the proposal to use agile development procedures of Scrum framework with UML modeling language applicable for creating websites of small scale. The emphasis is especially put on creating a practically usable type model of the websites. The theoretical part of the thesis has two main chapters. In the "Agile methodology" chapter are listed principles of agile approach to creating software. The next part of this chapter is focus on agile methodologies (Scrum, XP, ASD, FDD, DSDM, LD and Crystal). In the "UML" chapter is introduced modeling language UML and its principles. The next part of this chapter is focus on UML diagrams used in practical part of this thesis (use case diagram, class diagram, sequence diagram, activity diagram and deployment diagram). The practical part of this thesis focuses on the design type model for creating websites of small scale. The type model is based both on the theoretical part of this work and practical experience of the author. In the first part is introduced scheme of model, where is shown the mutual relationship of individual phases. In the next part of this chapter are discussed the individual phases where is used the principle of agile development framework Scrum and examples of use of the UML diagrams.
|
guest ::
