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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.
271

Příprava realizace přestavby domova pro seniory v Brně / Preparation for the reconstruction of a home for the elderly in Brno

Vičar, Ondřej January 2022 (has links)
The topic of the thesis is the construction and technological preparation of the extension of the retirement home in Brno. It is a three-storey building based on piles with combined vertical structures and monolithic ceilings, the building has a flat roof. The work includes a technical report, time and financial plan of the building, project of construction site equipment, mechanical assembly of the main mechanisms used during construction, as well as a time plan and the necessary number of workers.
272

Hotel v Dolní Lomné - stavebně technologický projekt / Hotel in Dolní Lomná - construction technology project

Bulawa, Tomáš Unknown Date (has links)
The subject of this diploma thesis is dealing with a construction-technological project of a hotel in Dolní Lomná. The main subject of this thesis is a technological report, coordination situation of the construction with broader relations to transport routes, a time and financial plan of the construction, a feasibility study of the main technological phases, a project of the site equipment, a suggested list of the main construction vehicles and building mechanisation, a time-schedule plan, a plan of material resources, a technological regulation for the implementation of monolithic ceilings, control and test plan, health and safety at work and a technological regulation for the implementation of rider bracing with economic balance. Part of the work is the itemized budget and calculating to THU.
273

Stavebně technologický projekt polyfunkčního domu na Cihlářské ulici v Brně / Construction technological project of a multifunctional house on Cihlářská Street in Brno

Kaman, Tomáš Unknown Date (has links)
This diploma thesis deals with selected parts of the construction technology project of a multifunctional house in Brno on Cihlářská Street. Thesis contains a technical report, coordination situation and marking of transport routes of vehicles, time and financial plan of construction, study of the main technological stages of building, technical report of site equipment including drawing of site equipment, design of main construction machines including verification of bearing capacity and reach object, technology prescription and control and test plan for monolithic ceiling structure. The diploma thesis also includes selected LEED certification credits and a health and safety plan.
274

Statické řešení parkovacího domu / Static solution of parking house

Tvrzník, Jakub Unknown Date (has links)
The diploma thesis is focused on the design of the supporting structure of a multi-storey parking house. Part of the work is also a search of three parking houses in our country and in Slovakia. The content of the work is a preliminary design of 3 variants of a typical ceiling structure. Subsequently, one variant is selected and processed in detail. A flexurally supported slab-wall model was created in Scia Engineer for the analysis of the structure. Selected structural elements were modeled separately. Additional assessment is performed in GEO, FINE, IDEA Statica, JORDAHL and MS Excel software.
275

Kongresový hotel - Brno,Veveří / Congress hotel - Brno,Veveří

Mazalová, Michaela Unknown Date (has links)
The diploma thesis processes project documentation for the construction of a hotel building with a lobby bar, which is located in the central part of the regional city of Brno. The building has four floors and is covered by flat roofs. The hotel meets the conditions of a four-star (****) economic standard. It is designed with 17 accommodation units with a capacity of total 40 persons and a lobby bar for 60 guests and social facilities. In addition to the accommodation content, the hotel will have a conference hall for training, corporate events, etc. Due to the lack of parking spaces in the city of brno, the hotel will also have underground garages primarily designed for parking cars of hotel visitors. The apartments and guest rooms are located on the 2nd., 3rd. a 4th. NP floor. On the ground floor there is a representative space of the hotel composed of the entrance hall with reception, space for hotel management, a lobby bar with social facilities and a gym, which will also be open to the public. In the basement there are underground garages and technical facilities of the hotel. On the 4th floor there is, among other things, a small wellness area with massages, saunas, a bar and an outdoor terrace. The hotel building is designed as a reinforced concrete skeleton with a reinforcing core, with 4 floors and basement. The design of the hotel will be designed in the spirit of modern materials, simple members and shapes. A vegetation roof is designed to alleviate the overheating of the building in the summer and to meet the requirements of the city for the largest possible greening of buildings and their surroundings.
276

Administrativní budova - Brno / Office Building - Brno

Červinka, Tomáš Unknown Date (has links)
The aim of the diploma thesis is to design a new office building with client operation. The building is designed with requirements for buildings with almost zero energy consumption. The project also includes a complete fire safety solution for the building and a certificate of the building's energy performance. The diploma thesis is processed in the form of documentation for execution of the project.
277

Polymeric Monolithic Stationary Phases for Capillary Hydrophobic Interaction Chromatography

Li, Yuanyuan 06 October 2010 (has links) (PDF)
Rigid poly[hydroxyethyl acrylate-co-poly(ethylene glycol) diacrylate] (Poly(HEA-co-PEGDA) monoliths were synthesized inside 75-µm i.d. capillaries by one-step UV-initiated copolymerization using methanol and ethyl ether as porogens. The optimized monolithic column was evaluated for hydrophobic interaction chromatography (HIC) of standard proteins. Six proteins were separated within 20 min with high resolution using a 20 min elution gradient, resulting in a peak capacity of 54. The performance of this monolithic column for HIC was comparable or superior to the performance of columns packed with small particles. Monoliths synthesized solely from PEGDA were also found to show excellent performance in HIC of proteins. Continuing efforts showed that rigid monoliths could be synthesized from PEGDA or poly(ethylene glycol) dimethacrylates (PEGDMA) containing different ethylene glycol chain lengths for HIC of proteins. Effects of PEG chain length, bi-porogen ratio and reaction temperature on monolith morphology and back pressure were investigated. Monoliths prepared from PEGDA 258 were found to provide the best chromatographic performance with respect to peak capacity and resolution. An optimized PEGDA 258 monolithic column was able to separate proteins using a 20-min elution gradient with a peak capacity of 62. The preparation of these in situ polymerized single-monomer monolithic columns was highly reproducible. The single-monomer synthesis approach clearly improves column-to-column reproducibility.The highly crosslinked monolith networks resulting from single crosslinking monomers were found to enhance the surface area of the monolith and concentrations of mesopores. Thus, monolithic columns were developed from four additional crosslinking monomers, i.e., bisphenol A dimethacrylate (BADMA), bisphenol A ethoxylate diacrylate (BAEDA, EO/phenol = 2 or 4) and pentaerythritol diacrylate monostearate (PDAM) for RPLC of small molecules. Gradient elution of alkyl benzenes and alkyl parabens was achieved with high resolution using all monolithic columns. Porogen selection for the BADMA and PDAM was investigated in detail with the intention of obtaining data that could possiblly lead to a rational method for porogen selection.
278

Совершенствование наружных стен, выполняемых из газозолобетонных блоков, в многоэтажных каркасных жилых домах : магистерская диссертация / Improvement of external walls made of aerated concrete blocks in multi-storey frame residential buildings

Усьянцев, С. Д., Usyantsev, S. D. January 2021 (has links)
Работа посвящена изучению многослойных наружных ограждающих конструкций наружных стен многоэтажных жилых каркасных зданий. В современном строительстве такие конструкции выполняются как правило на основе блоков из ячеистого бетона (газозолобетонные блоки). Применение подобных решений оправдано благодаря своей тепловой эффективности. Однако дискуссионным остается вопрос о рациональности использования существующих решений стеновых ограждений, так как необходимость устройства нескольких слоев из различных конструкционных материалов приводит к увеличению трудоемкости возведения. Кроме того, многослойные решения наружных стен зданий предъявляют повышенные требования к качеству выполнения работ, к качеству решений по обеспечению совместной работы нескольких разнообразных по физическим параметрам слоев, и порой такие решения снижают эксплуатационную надежность стенового ограждения, что, к сожалению, нередко приводит к авариям и обрушениям конструкций. Основным вопросом, решенным в исследовании является нахождение наименее трудозатратного варианта ограждающей конструкции, который бы имел сопоставимые с существующими стенами характеристики, а также снижал вероятность ошибки при сооружении наружных стен, которые могут приводить к авариям конструкций. / Present work is devoted to the study of multilayer external enclosing structures of external walls of multi-storey residential frame buildings. In modern construction, such structures are usually made on the basis of aerated concrete blocks. The use of such solutions is justified due to its thermal efficiency. However, the question of the rationality of using existing solutions for wall fences remains debatable, since the need to install several layers of various structural materials leads to an increase in the complexity of construction. In addition, multilayer solutions for the outer walls of buildings place increased requirements for the quality of in place works and overall construction technical quality to ensure the proper action of joints consisted of several layers with various physical parameters, and sometimes such solutions reduce the operational reliability of the wall enclosure, which, unfortunately, often leads to accidents and collapse of structures. The main issue solved in the study is to find the least labor-intensive version of the enclosing structure, which would have characteristics comparable to existing walls, and also reduce the likelihood of errors in the construction of external walls, which can lead to structural failures.
279

Сравнительный анализ сборно-монолитных систем Китая и России: разработка предложений по усовершенствованию узлов сопряжения стен для работы на сейсмические нагрузки : магистерская диссертация / Comparative analysis of prefabricated monolithic systems in China and Russia: development of proposals for improving wall interface units for operation under seismic loads

Ван, Х., Wang, H. January 2023 (has links)
Сборно-монолитные здания – распространенный вид строительства на сегодняшний день. Сборно-монолитные здания появились в России в 1970-х годах и в Китае в 1990-х годах. В данной работе сравнивается распространенная китайская модель строительства, имеющей стеновую конструктивную схему, с наиболее похожей российской системой. Анализ конструктивного исполнения узлов сопряжения несущих стен между собой показал их низкую несущую способность при действии сейсмических нагрузок. В работе выполнено математическое обоснование и разработано предложение по усовершенствованию данных узлов сопряжения путем введения в их работу шарниров, что значительно увеличивает несущую способность стыкового соединения при действии сейсмических нагрузок. / Prefabricated monolithic buildings are a common type of construction today. Prefabricated monolithic buildings appeared in Russia in the 1970s and in China in the 1990s. This paper compares the common Chinese construction model, which has a wall structure, with the most similar Russian system. An analysis of the design of the joints between the load-bearing walls showed their low load-bearing capacity under the action of seismic loads. The work carried out a mathematical substantiation and developed a proposal to improve these interface units by introducing hinges into their operation, which significantly increases the load-bearing capacity of the butt joint under the action of seismic loads.
280

Algoritmo de reconstrucción analítico para el escáner basado en cristales monolíticos MINDView

Sánchez Góez, Sebastián 17 January 2021 (has links)
[ES] La tomografía por emisión de positrones (PET, del inglés Positron Emission Tomography) es una técnica de medicina nuclear en la que se genera una imagen a partir de la detección de rayos gamma en coincidencia. Estos rayos son producidos dentro de un paciente al que se le inyecta una radiotrazador emisor de positrones, los cuales se aniquilan con electrones del medio circundante. El proceso de adquisición de eventos de interacción, tiene como unidad central el detector del escáner PET, el cual se compone a su vez de un cristal de centelleo, encargado de transformar los rayos gamma incidentes en fotones ópticos dentro del cristal. La finalidad es entonces, determinar las coordenadas de impacto dentro del cristal de centelleo con la mayor precisión posible, para que, a partir de dichos puntos, se pueda reconstruir una imagen. A lo largo de la historia, los detectores basados en cristales pixelados han representado la elección por excelencia para la la fabricación de escáneres PET. En está tesis se evalúa el impacto en la resolución espacial del escáner PET MINDView, desarrollado dentro del séptimo programa Marco de la Unión Europea No 603002, el cual se basa en el uso de cristales monolíticos. El uso de cristales monolíticos, facilita la determinación de la profundidad de interacción (DOI - del inglés Depth Of Interaction) de los rayos gamma incidentes, aumenta la precisión en las coordenadas de impacto determinadas, y disminuye el error de paralaje que se induce en cristales pixelados, debido a la dificultad para determinar la DOI. En esta tesis, hemos logrado dos objetivos principales relacionados con la medición de la resolución espacial del escáner MINDView: la adaptación del un algoritmo de STIR de Retroproyección Filtrada en 3D (FBP3DRP - del inglés Filtered BackProjection 3D Reproyected) a un escáner basado en cristales monolíticos y la implementación de un algoritmo de Retroproyección y filtrado a posteriori (BPF - BackProjection then Filtered). Respecto a la adaptación del algoritmo FBP, las resoluciones espaciales obtenidas varían en los intervalos [2 mm, 3,4 mm], [2,3 mm, 3,3 mm] y [2,2 mm, 2,3 mm] para las direcciones radial, tangencial y axial, respectivamente, en el primer prototipo del escáner MINDView dedicado a cerebro. Por otra parte, en la implementación del algoritmo de tipo BPF, se realizó una adquisición de un maniquí de derenzo y se comparó la resolución obtenida con el algoritmo de FBP y una implementación del algoritmo de subconjuntos ordenados en modo lista (LMOS - del inglés List Mode Ordered Subset). Mediante el algoritmo de tipo BPF se obtuvieron valores pico-valle de 2.4 a lo largo de los cilindros del maniquí de 1.6 mm de diámetro, en contraste con las medidas obtenidas de 1.34 y 1.44 para los algoritmos de FBP3DRP y LMOS, respectivamente. Lo anterior se traduce en que, mediante el algoritmo de tipo BPF, se logra mejorar la resolución para obtenerse un valor promedio 1.6 mm. / [CAT] La tomografia per emissió de positrons és una tècnica de medicina nuclear en la qual es genera una imatge a partir de la detecció de raigs gamma en coincidència. Aquests raigs són produïts dins d'un pacient a què se li injecta una radiotraçador emissor de positrons, els quals s'aniquilen amb electrons de l'medi circumdant. El procés de adquición d'esdeveniments d'interacció, té com a unitat central el detector de l'escàner PET, el qual es compon al seu torn d'un vidre de centelleig, encarregat de transformar els raigs gamma incidents en fotons òptics dins el vidre. La finalitat és llavors, determinar les coordenades d'impacte dins el vidre de centelleig amb la major precisió possible, perquè, a partir d'aquests punts, es pugui reconstruir una imatge. Al llarg de la història, els detectors basats en cristalls pixelats han representat l'elecció per excellència per a la la fabricació d'escàners PET. En aquesta tesi s'avalua l'impacte en la resolució espacial de l'escàner PET MINDView, desenvolupat dins el setè programa Marc de la Unió Europea No 603.002, el qual es basa en l'ús de vidres monolítics. L'ús de vidres monolítics, facilita la determinació de la profunditat d'interacció dels raigs gamma incidents, augmenta la precisió en les coordenades d'impacte determinades, i disminueix l'error de parallaxi que s'indueix en cristalls pixelats, a causa de la dificultat per determinar la DOI. En aquesta tesi, hem aconseguit dos objectius principals relacionats amb el mesurament de la resolució espacial de l'escàner MINDView: l'adaptació de l'un algoritme de STIR de Retroprojecció Filtrada en 3D a un escàner basat en cristalls monolítics i la implementació d'un algoritme de Retroprojecció i filtrat a posteriori. Pel que fa a l'adaptació de l'algoritme FBP3DRP, les resolucions espacials obtingudes varien en els intervals [2 mm, 3,4 mm], [2,3 mm, 3,3 mm] i [2,2 mm, 2,3 mm] per les direccions radial, tangencial i axial, respectivament, en el primer prototip de l'escàner MINDView dedicat a cervell. D'altra banda, en la implementació de l'algoritme de tipus BPF, es va realitzar una adquisició d'un maniquí de derenzo i es va comparar la resolució obtinguda amb l'algorisme de FBP3DRP i una implementació de l'algoritme de subconjunts ordenats en mode llista (LMOS - de l'anglès List Mode Ordered Subset). Mitjançant l'algoritme de tipus BPF es van obtenir valors pic-vall de 2.4 al llarg dels cilindres de l'maniquí de 1.6 mm de diàmetre, en contrast amb les mesures obtingudes de 1.34 i 1.44 per als algoritmes de FBP3DRP i LMOS, respectivament. L'anterior es tradueix en que, mitjançant l'algoritme de tipus BPF, s'aconsegueix millorar la resolució per obtenir-se un valor mitjà 1.6 mm. / [EN] Positron Emission Tomography (PET) is a medical imaging technique, in which an image is generated from the detection of gamma rays in coincidence. These rays are produced within a patient, who is injected with a positron emmiter radiotracer, from which positrons are annihilated with electrons in the media. The event acquisition process is focused on the scanner detector. The detector is in turn composed of a scintillation crystal, which transform the incident ray gamma into optical photons within the crystal. The purpose is then to determine the impact coordinates within the scintillation crystal with the greatest possible precision, so that, from these points, an image can be reconstructed. Throughout history, detectors based on pixelated crystals have represented the quintessential choice for PET scanners manufacture. This thesis evaluates the impact on the spatial resolution of the MINDView PET scanner, developed in the seventh Framework program of the European Union No. 603002, which detectors are based on monolithic crystals. The use of monolithic crystals facilitates the determination of the depth of interaction (DOI - Depth Of Interaction) of the incident gamma rays, increases the precision in the determined impact coordinates, and reduces the parallax error induces in pixelated crystals, due to the difficulties in determining DOI. In this thesis, we have achieved two main goals related to the measurement of the spatial resolution of the MINDView PET scanner: the adaptation of an STIR algorithm for Filtered BackProjection 3D Reproyected (FBP3DRP) to a scanner based on monolithic crystals, and the implementation of a BackProjection then Filtered algorithm (BPF). Regarding the FBP algorithm adaptation, we achieved resolutions ranging in the intervals [2 mm, 3.4 mm], [2.3 mm, 3.3 mm] and [2.2 mm, 2.3 mm] for the radial, tangential and axial directions, respectively. On the an acquisition of a derenzo phantom was performed to measure the spacial resolution, which was obtained using three reconstruction algorithms: the BPF-type algorithm, the FBP3DRP algorithm and an implementation of the list-mode ordered subsets algorithm (LMOS). Regarding the BPF-type algorithm, a peak-to-valley value of 2.4 were obtain along rod of 1.6 mm, in contrast to the measurements of 1.34 and 1.44 obtained for the FBP3DRP and LMOS algorithms, respectively. This means that, by means of the BPF-type algorithm, it is possible to improve the resolution to obtain an average value of 1.6 mm. / Sánchez Góez, S. (2020). Algoritmo de reconstrucción analítico para el escáner basado en cristales monolíticos MINDView [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/159259

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