National Repository of Grey Literature 110 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Voltammetry with Preliminary Extraction as a New Approach for Rapid Determination of Formaldehyde in Wood-Based Products
Dvořák, Pavel ; Vyskočil, Vlastimil (advisor) ; Dejmková, Hana (referee)
The aim of the presented Diploma Thesis was to develop a new method for the indirect determination of formaldehyde in wood-based products using gas-diffusion microextraction coupled with electrochemical detection on unmodified screen-printed electrodes (MLEM-SPCE). Formaldehyde released from the sample is derivatized using an acetylacetone reagent present in an acceptor solution. The product of derivatization of formaldehyde with acetylacetone is 3,5-diacetyl-1,4-dihydrolutidine (DDL) which forms a selective oxidation voltammetric peak at a potential of 0.4 V. Detection and quantification limits of 0.57 mg kg−1 and 1.89 mg kg−1 , respectively, were obtained, together with intra- and inter-day precision below 10% (as relative standard deviation, RSD). The developed methodology was applied to determine formaldehyde content in seven samples. Similar results were obtained from the European standard method EN 717-3 with a significant reduction of total analysis time. The developed method MLEM-SPCE, which combines the use of a new sample preparation procedure for volatile compounds with the firstly introduced determination of formaldehyde (as the derivative product DDL) on unmodified SPCEs, proves to be a promising alternative for the determination of formaldehyde in wood-based products and other samples.
Multifunctional building
Dvořák, Pavel ; Šobrová, Zdena (referee) ; Utíkalová, Ivana (advisor)
The aim of the diploma thesis is to elaborate project documentation of a new-build mixed-use building in Moravske Budejovice, in the cadastral area of Moravske Budejovice. The mixed-use building comprises a partial cellar and three floors above the ground. In the cellar, technical facilities and storage space for the residental part of the building can be found. The ground floor and the part of the first floor are designed for commercial premises, a hairdresser's, a florist's, a bookshop and a café. Residental unit consisting of three flats is located on the first and second floor. the building is made from 300 mm thick ceramic construction blocks with the external thermal insulation system. Ceiling construction is made of 250 mm thick concrete monolithic panels. Furthermore, the documentation deals with potable water, electric power and gas couplers, sewerage system, rainwater sewer and paved surface for pedestrians and motor vehicles. The thesis is elaborated as documentation for the building execution.
Study of rehabilitation of selected part of sewer network
Dvořák, Pavel ; Helcelet, Marek (referee) ; Raclavský, Jaroslav (advisor)
The topic of this thesis is to create a study of the rehabilitation of the sewer network. The sewer system under assessment is located in city Znojmo, specifically Znojmo – city. In this case, rehabilitation is proposed in order to improve the functional operational properties of the sewer network and extend its service life. The work was divided into two basic parts, namely the Accompanying and Summary Technical Report. Three variants of solution were proposed. The first two variants are made as trenchless using a sanitation sleeve in the first one and a short sanitation sleeve in combination with a sanitation sleeve in the second. The third variant is made as an open excavation recovery. A description of the rehabilitation technology was carried out and the facts that each individual Option or what the three Option would bring up were defined. These three variants of the solution are assessed in terms of economic, technical and environmental impact.
Length bounded cuts in graphs
Berg, Michal ; Kolman, Petr (advisor) ; Dvořák, Pavel (referee)
In this thesis we will focus on a problem of length bounded cut, also known as L-bounded cut. We are going to show a combinatorial algorithm for finding a minimal L-bounded cut on graphs with bounded treewidth based on dynamic programming. Then we going to show that this algorithm can also be used for finding minimal L-bounded cut on plannar graphs. We are also going to look at problem of (dG(s, t) + 1)-bounded cut. This problem is known to be NP-hard for general graphs. But it is an open problem whether this problem is also NP-hard on plannar graphs with special vertices on the outer face. We will try to outline a way, which might lead to showing that this problem is solvable in a polynomial time.
Amine plasma polymers preparation and their interaction with ECM proteins
Dvořák, Pavel ; Kozáková, Zdenka (referee) ; Zajíčková, Lenka (advisor)
The bachelor thesis deals with the preparation of amine plasma polymers which were prepared in low pressure radiofrequency capacitively coupled plasma discharge using cyclopropylamine (CPA) monomer. The amine functionalized surfaces find application as scaffolds for the immobilization of biomolecules. In this work, the interaction of plasma polymers with ECM proteins, specifically with collagen, was investigated.
Probe methods for diagnostics of plasmatic systems for deposition of thin films
Zanáška, Michal ; Tichý, Milan (advisor) ; Dvořák, Pavel (referee) ; Straňák, Vítězslav (referee)
The doctoral thesis deals with an experimental study of several diagnostic techniques intended for plasma diagnostics and diagnostics of thin films during reactive sputter deposition. A relatively novel probe diagnostic technique called Floating harmonic probe for measurement of the ion density and electron tem- perature in technological low-temperature plasma is studied. A Langmuir probe is commonly used, however, its application in conditions where non-conducting films are being deposited can be problematic or unreliable. The floating harmonic probe measurement technique deals with this inherent problem of the Langmuir probe. The Floating harmonic probe results are compared to those obtained by a classical Langmuir probe in non-reactive DC continuously driven discharge, and its applicability in reactive regime during deposition of iron oxide thin films is proved. The work deals also with a modification of the Floating harmonic probe called Phase Delay Harmonic Analysis Method which is intended for diagnostics of pulsed driven discharges. The second part of the thesis is devoted to a new proposed method for in-situ diagnostics of thin films. This method monitors the capacitance and resistance of a thin film during deposition up to the frequencies in the kHz range. This new method could be used for...
The influence of the US and other NATO states on German policy and deployment of the Bundeswehr in the ISAF mission in Afghanistan
Dvořák, Pavel ; Handl, Vladimír (advisor) ; Kučera, Tomáš (referee) ; Urbanovská, Jana (referee)
This dissertation focuses on Germany policy concerning the deployment of the Bundeswehr within the ISAF mission in Afghanistan between 2001 and 2014. These issues will be examined in the context of the German army's foreign engagement after 1990. The main goal will be to assess how the decision-making process of the German government and the members of the parliament was affected by their taking into consideration Germany's ties to the USA and other important NATO members. The German government strived to maintain its influence within the NATO alliance and, at the same time, its reputation of a reliable and responsible ally. The impact of this external (alliance-related) factor will also be analysed with respect to the "culture of restraint" ̶ Germany's traditionally restrained approach to its armed forces deployment. Thus in addition to concrete examples of the German government's decisions on strengthening its military engagement in Afghanistan in relation to their NATO partners, the dissertation will concentrate on some ISAF combat operations in which German troops were involved. In the end, this work will elaborate on the consequences of the ISAF mission for Germany's future policy concerning the deployment Bundeswehr abroad. The research methods applied in this dissertation include...
Study of rehabilitation alternatives of the selected part of the sewerage network
Dvořák, Pavel ; Prax,, Petr (referee) ; Raclavský, Jaroslav (advisor)
The theme of this bachelor thesis is elaboration, evaluation and comparison of alternative ways of solving the reconstruction of a part of a sewer network. For this purpose, this bachelor thesis is divided to two parts. In the first part, there is a researchof the metods used for repair and reconstruction of a sewer network, with the greatest emphasis being placed on methods of renovation, whose goal is to improve the functional and operational properties of the sewer. There are also descriptions of technological procedures, usability area and the basic technical parameters from manufacturers. In the second part, the acquired knowledge is applied in the solution of the reconstruction of the real sewer network, namely in the urban part of Znojmo, Znojmo - město, the residential area of Pražská street. Two solutions have been developed. At first variant only trenchless technologies were considered, in the second variant a recovery of the pipeline by open trench.
Small apartment house
Dvořák, Pavel ; Vacenovská, Veronika (referee) ; Utíkalová, Ivana (advisor)
The aim of this bachelor thesis is to elaborate the project documentation of a new-built small apartment building in Litohor. The apartment building is partially basement with three above-ground floors and one main entrance to the building. A total of eight residentail units and common areas for the residents of the building. The vertical loadbearing structures are made of ceramic masonry units. The horizontal loadbearing structures and staircase are made of reinforced monolithic concrete slab. The roof consists of a cut roof. Windows and doors are made of aluminium. The building will be heated by the heat pump. There are sixteen parking spaces in the ground.

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