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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The use of glass fibre as reinforcement for thin concrete structures, with particular reference to shell structures

Agbim, Charles Chuba January 1962 (has links)
The thesis investigates the feasibility of utilising the tensile strength of glass-fibres in the reinforcement of concrete components. It tackles the initial problem of securing adequate bond and ensuring true composite action between the concrete and the glass fibres. Some of the fundamental characteristics of the reinforcement and of concrete members reinforced with it are established.
2

Penzion / Pension

Veřmiřovský, Martin January 2020 (has links)
The subject of my diploma thesis is a new-build quest pension in Čeladná. The building has two above-ground floors in the first part and one floor is in the second part. The pension is partially with a cellar and i tis located in the periphery of tve village on nearly flat terrain. The second floor is only for pension quests. On the first floor, there i salso a restaurant with a covered terrace. The perimeter load-bearing walls of above-ground floors are mad of Porotherm brick blocks, underground walls are made of BUILD IN concrete blocks. The ceiling structure consists of a folded ceiling of prestressed spiral ceiling panels spiroll. The roof above the second floor is formed as a double-skin flat roof. A vegetation single-skin flat roof is designed above the first floor. The parking for visitors is located on the east side, also the parking for the epmloye is designed on the south side.
3

Hydraulic Power Steering System Design in Road Vehicles : Analysis, Testing and Enhanced Functionality

Rösth, Marcus January 2007 (has links)
Demands for including more functions such as haptic guiding in power steering systems in road vehicles have increased with requirements on new active safety and comfort systems. Active safety systems, which have been proven to have a positive effect on overall vehicle safety, refer to systems that give the driver assistance in more and less critical situations to avoid accidents. Active safety features are going to play an increasingly important roll in future safety strategies; therefore, it is essential that sub systems in road vehicles, such as power steering systems, are adjusted to meet new demands. The traditional Hydraulic Power Assisted Steering, HPAS, system, cannot meet these new demands, due to the control unit's pure hydro-mechanical solution. The Active Pinion concept presented in this thesis is a novel concept for controlling the steering wheel torque in future active safety and comfort applications. The concept, which can be seen as a modular add-on added to a traditional HPAS system, introduces an additional degree of freedom to the control unit. Different control modes used to meet the demands of new functionality applications are presented and tested in a hardware-in-the-loop test rig. This thesis also covers various aspects of hydraulic power assisted steering systems in road vehicles. Power steering is viewed as a dynamic system and is investigated with linear and non-linear modeling techniques. The valve design in terms of area gradient is essential for the function of the HPAS system; therefore, a method involving optimization has been developed to determine the valve characteristic. The method uses static measurements as a base for calculation and optimization; the results are used in both linear and the non-linear models. With the help of the linear model, relevant transfer functions and the underlying control structure of the power steering system have been derived and analyzed. The non-linear model has been used in concept validation of the Active Pinion. Apart from concept validation and controller design of the active pinion, the models have been roven effective to explain dynamic phenomena related to HPAS systems, such as the chattering phenomena and hydraulic lag. / The printed version and the electronic version differ in that the electronic version contains two built in video films (see page 78 and page 89).
4

Bytový dům / Apartment house

Rozhoň, Ivan January 2014 (has links)
Four-storey, basementless apartment house with single skin flat roof. Permanent shuttering system VELOX is used for vertical and horizontal bearing constructions. The apartment house contains twelve apartments.
5

Ekonomická výhodnost způsobu provedení stavební konstrukce při výstavbě rodinného domu / Economic Profitability of the Facture of the Engineering Structure During the Family House Construction

Šerejchová, Petra January 2014 (has links)
The aim of this thesis is the economic profitability of the facture of the engineering structure during the family house construction. Theoretical part describes the topic price, costs, setting the budget and types of materials for building family houses. Practical part is describe family house which is chosen for the budgets. It looks on the chosen sort of constructive systems in terms of technology and price.
6

Improved understanding and control of Mg-doped GaN by plasma assisted molecular beam epitaxy

Burnham, Shawn David 18 June 2007 (has links)
By an improved understanding of Mg-doped GaN through an exhaustive review of current limitations, increased control over the material was achieved by addressing several of these issues. To address the issues of the memory effect, low sticking coefficient and high vapor pressure of Mg, a new Mg dopant source was implemented, characterized and modeled for p-type doping of GaN. The device enhanced the sticking coefficient of Mg by energizing the outgoing Mg flux, and also allowed the first reported demonstration of an abrupt junction between two non-zero Mg concentrations and a graded Mg-doped GaN film. The significant compensation of Mg acceptors at high dopant concentrations was used advantageously to develop a new ex situ resistivity analysis technique using the energy distributions of SIMS to characterize doping of buried layers. The new technique was used to identify the barrier between conductive and resistive Mg doping for increased Mg concentration, which was then used to optimize Mg-doped GaN. Because Mg doping exhibits a dependence upon the growth regime, a new growth and regime characterization technique was developed using specific RHEED intensity responses to repeat growth conditions. During the development of this technique, a new surface kinetics growth model for III-nitrides was discovered based on DMS observations, which suggests preferential buildup of the metal bilayer before growth begins with an unfamiliar cation-anion exchange process initially upon metal shutter opening. Using the new RHEED growth and regime characterization technique, a new growth technique called metal modulated epitaxy (MME) was developed to increase repeatability, uniformity and smoothness. The MME technique was enhanced with a closed-loop control using real-time feedback from RHEED transients to control shutter transitions. This enhancement, called smart shuttering, led to improved growth rate and further improvement of surface roughness and grain size, which were repeatable within low percentages. Effects of smart-shuttering MME were observed with Si, Mg and In during GaN growths. Repeatable Mg-doped GaN was achieved with a variation of less than 8%, and a peak hole carrier concentration of 4.7E18 cm^-3.
7

Vinařství / Viticulture

Trachtulcová, Zuzana January 2015 (has links)
The subject of the thesis is an object of a new building winery, which is situated in the village Polešovice in region of Zlín. The object incorporate manufacturing part, accommodation part, social part and administrative part. The object is detached building with two above-ground floors and one underground floor. On the underground floor there are technical facilities, production of wine and stock for 60 000 litres of wine. On the ground floor there is a central part, where is a room for degustation. Next to this room there is a bar and kitchen. There are 10 rooms with capacity for 20 people. On the first floor there is a laboratory, rest room for staff, archive and office. In front of the building there is a park for 13 vehicles. The building was designed as a brick building with vertical structures designed from a structural system POROTHERM and concrete shaped bricks POSTA. There is a part of building with flat roof with vegetation and part of building with flat roof walkway and the highest part is covered with girder.
8

Hotel s wellness zónou / Hotel with wellness zone

Fafílková, Jana January 2015 (has links)
Theme of this diploma thehis is a newly buil hotel on the beach of Vranov reservoir. The building is surrounded by sloping terrain. The building has one underground floor and three floors. The structural system of the basement part is made up of permanent shuttering and the above-ground part is made up of system Porotherm. Ceiling construction is made up of reinforced concrete. The building is covered with a flat roof.
9

Rehabilitační centrum / Rehabilitation centre

Duben, Tomáš January 2020 (has links)
The main target of the thesis is design of a new building of the rehabilitation center in Havlíčkův Brod. The rehabilitation center consists of three part. The main (middle) part has two above-ground floors and a basement with flat roof and the other two parts have only ground floor with green flat roof. The main middle part contains reception, café, laundry room storage, utility room, manager‘s office and outpatients doctor‘s office. In the left part there are hydrotherapy, ergotherapy, magnetotherapy and electrotherapy. In the right part there are fitness center and physiotherapy rooms. Vertical load-bearing structures are Made of Porotherm ceramic blocks (above-ground floors) and the Hollow concrete blocks filled with C20/25 and reinforcement B500B (basement). Horizontal load-bearing structures are made of the prestressed Spiroll ceiling panels. The building site contains also outdoor car park and garden with pond. The project and visualization were carried out in the ArchiCad and Lumion programme. All structures comply with the valid standards and regulations.
10

Vinařský dům / Wine house

Neduchal, Martin January 2014 (has links)
The subject of the thesis is an object of a new building wine house. The object has two underground floors and two above floors and object has flat roof. Underground floors are designed from BUILD IN shuttering. Both above floors are from ceramic blocks. Ceiling construction is from reinforced concrete panels. Second underground Porotherm

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