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351	Počítačová analýza obrazu z metody LBIC / Computer analyse of LBIC pictures Štencel, Jakub January 2010 (has links) This thesis is concerned with image picture analysis, especially with images obtained by diagnostic LBIC method. The individual defects occuring on solar cells are described in theoretical part, including methods which serve for making referential image. Furthermore, the creation of difference image is analysed, from whom the interferences will be evaluated. The aim of practical part is to focus on generation of algorithms which investigate the defects, and the description of application for program control is described in conclusion.
352	Optimalizace kovaných vysokotlakých elementů zásobníku paliva systému common rail / Optimization of Forged High Pressure Elements of Fuel Accumulator of Common Rail System Klepetko, David January 2009 (has links) The subject of this thesis is the optimization of forged high pressure elements of fuel accumu-lator of Common Rail System. The aim of this work is to assess the current state and design the individual high pressure elements in the CAD system. There is implemented strain and stress analysis in the FEM system Abaqus/CAE and in fatigue postprocessor FEMFAT for all designs. On the basis of this analysis are proposed optimized design solutions.
353	Hydraulické posunovače / Hydraulic pullers Kvasnica, Tomáš January 2009 (has links) This Diploma thesis occupies with design of hydraulic puller. In work are mentioned possible types of construction. Choice construction of puller is disposed with parameters: maximum pushing force 50 kN, speed of piston rod 0,05 m/s. This work also contains FEM analysis by computer programme I-DEAS. The work also occupies with design of fluid drive.
354	Analýza kostry synchronního generátoru / The analysis of frame synchronous generator Marada, Ondřej January 2011 (has links) The thesis is focused on the examination of the utility of a synchronous generator of a small hydroelectric power station in the case of a change of working position of the machine. The utility will be measured on the basis of the examination of deformations and state of stress of the frame of the generator for the present running (with vertical axis of rotation of the generator) and subsequently for modified running (with horizontal axis of rotation). This will be accomplished partly on the static shell model by finite element method and consequently on the simplified dynamic model.
355	Hydraulické posunovače / Hydraulic pullers Pavelka, Roman January 2011 (has links) This diploma thesis deals with the mechanical proposal of hydraulic puller. Furthermore, it includes the detail design solutions. The project also includes the calculation of the hydraulic puller parameters: maximum pushing force is 60 kN, speed of movement is 0.1 m s-1. This work also contains of stress analysis FEM with I-DEAS software. Following part deals with the design of hydraulic circuit for driving puller. At the end of work there are options for replacements of hydraulic puller by mechanical systems.
356	Optimalizace uložení projektorové čočky / Placement Optimization of Projector Lens Bezděk, Matěj January 2014 (has links) This diploma thesis deals with the creation of engineering design of holder of projector lens. The thesis is created in cooperation with department of development in Varroc Lighting Systems, s.r.o. Initial part provides a brief description of the development of lighting technology used in car´s headlamps. The following part describes solutions currently used in clamping the lens in holder. The main part of the thesis focuses on the design of holder of projector lens itself. Projector lenses testing provide critical values of cohesive failure of the lens material, which cannot be exceed during the process of lens fitting and its subsequent clamping. In the final part the engineering design is verified and optimized using finite element analysis.
357	Deformačně napjatostní analýza prvků totální náhrady trapéziometakarpálního kloubu / Deformation and stress analysis of the parts of the total replacement of the trapeziometacarpal joint Svojanovský, Tomáš January 2015 (has links) The presented diploma thesis builds on author’s bachelor’s thesis of the similar name which was focused, in particular, on rhizarthrosis. Because of this joint disease, implantations of the total joint replacement are performed. The bachelor’s thesis also served as a familiarization with the finite element method and contact analyses issues, giving a theoretical framework for this diploma thesis. As opposed to that, the diploma thesis aims entirely at deformation and stress analysis of the total replacement. The main objective is to carry out analyses of different variants of geometric models. In addition, there is a tendency to analyze contact pressures of advanced model concerning all the total replacement, bone tissues, ligaments and tendons guaranteeing the static equilibrium of components. The bachelor’s thesis has been developed in ANSYS Workbench, whereas the diploma thesis in ANSYS APDL. Work in APDL allows user to control better over the entire computational process, however, requires more skills and theoretic knowledge. Contact analyses bring a lot of problems associated with convergence of procedures and accuracy of results. Therefore, explanations of important terms and set of recommendations are included for the purpose of easier solving of the contact problems.
358	Dynamische Auslegung von Zahnradgetrieben mittels Mehrkörpersimulation Eiselt, Uwe, Kelichhaus, Thomas 02 July 2018 (has links) Auf Grund wachsender Nachfrage der simulativen Beurteilung von Getrieben hinsichtlich Geräuschentwicklung, Vibration und Belastbarkeit, kommt den Berechnungsmethoden immer größere Bedeutung zu. Hier spielen nicht nur die Steifigkeit der Verzahnung, sondern auch die Steifigkeiten der Wellen, Lagerungen und Gehäuse eine wichtige Rolle. Dazu werden unterschiedliche Simulationsmethoden vorgestellt und diese hinsichtlich Genauigkeit, Effizienz und Limitierung bewertet. Ein wichtiger Aspekt ist in diesem Zusammenhang auch die Modellbildung, insbesondere die Ermittlung der Eingabedaten für die Beschreibung der einzelnen Komponenten und deren Verbindungselemente. Die Koppelung des Mehrkörpersystems mit einem speziellen Auslegungstool für Getriebekomponenten ist neben der Multi-Physics-Simulation und der klassischen Mehrkörperdynamik eine Methode, die die Stärken beider Tools verbindet. info:eu-repo/classification/ddc/629 ddc:629
359	Role of chlorhexidine in bond strength to artificially eroded dentin over time. Francisconi dos Rios, Luciana Fávaro, Casas-Apayco, Leslie, Calabria, Marcela Pagani, Francisconi, Paulo Afonso Silveria, Borges, Ana Flávia Sanches, Wang, Linda 04 1900 (has links) El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado. / PURPOSE: To assess the long-term effect of a 2% aqueous chlorhexidine (CHX) solution on bond strength to artificially eroded dentin compared to sound dentin. MATERIALS AND METHODS: Flat mid-coronal dentin surfaces of extracted third molars (n = 28) were subjected only to grinding with a 600-grit SiC paper for 1 min (sound dentin S, n = 14) or additionally to erosive pH cycling with a cola-based soft-drink (eroded dentin E, n = 14). After acid etching, rinsing, and air drying, S and E were rehydrated with 1.5 μl of 2% CHX (S2%, n = 7; E2%, n = 7) or of distilled water (control SC, n = 7; EC, n = 7). Composite buildups were incrementally constructed with Filtek Z350 following Adper Single Bond 2 application. Specimens were sectioned into beams, which were subjected to microtensile testing immediately or after 6 or 12 months of aging. Fractured surfaces were observed under a digital microscope (50X magnification). Microtensile bond strength (μTBS) (MPa) was analyzed by three-way ANOVA and Tukey's tests (α = 0.05) and failure mode by the Kruskal-Wallis test (α = 0.05). RESULTS: Compared to sound dentin, eroded dentin was consistently related to lower μTBS. Immediately and after 12-month aging, the effect of CHX was insignificant, but it was significant after 6-month aging, when it conserved the bond strength to both eroded and sound dentin. The percentage of adhesive and mixed failures were equivalent, and significantly more frequent than cohesive failures, whether in dentin or in composite. CONCLUSION: The 2% CHX effect on bond strength conservation to both eroded and sound dentin was not found to be persistent. / Revisión por pares Tooth erosion Dentin bonding stability chlorhexidine Proteases inhibitors Aging Acid Etching, Dental Anti-Infective Agents, Local Carbon Compounds, Inorganic Carbonated Beverages Chlorhexidine Composite Resins Dental Bonding Dental Cements Dental Etching Dental Materials Dental Stress Analysis Dentin Humans Hydrogen-Ion Concentration Microscopy, Confocal Mouthwashes Phosphoric Acids Saliva, Artificial Silicon Compounds Surface Properties Tensile Strength Time Factors Tooth Erosion Water
360	Effect of simulated intraoral erosion and/or abrasion effects on etch-and-rinse bonding to enamel. Wang, Linda, Casas-Apayco, Leslie, Hipólito, Ana Carolina, Dreibi, Vanessa Manzini, Giacomini, Marina Ciccone, Bim Júnior, Odair, Rios, Daniela, Magalhães, Ana Carolina 02 1900 (has links) El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado. / PURPOSE: To assess the influence of simulated oral erosive/abrasive challenges on the bond strength of an etch-and-rinse two-step bonding system to enamel using an in situ/ex vivo protocol. METHODS: Bovine enamel blocks were prepared and randomly assigned to four groups: CONT - control (no challenge), ABR - 3x/day-1 minute toothbrushing; ERO - 3x/day - 5 minutes extraoral immersion into regular Coca Cola; and ERO+ABR - erosive protocol followed by a 1-minute toothbrushing. Eight blocks were placed into an acrylic palatal appliance for each volunteer (n = 13), who wore the appliance for 5 days. Two blocks were subjected to each of the four challenges. Subsequently, all the blocks were washed with tap water and Adper Single Bond 2/Filtek Z350 were placed. After 24 hours, 1 mm2 beams were obtained from each block to be tested with the microtensile bond strength test (50 N load at 0.5 mm/minute). The data were statistically analyzed by one-way RM-ANOVA and Tukey's tests (alpha = 0.05). RESULTS: No difference was detected among the ABR, ERO, and CONT groups (P > 0.05). ERO+ABR group yielded lower bond strengths than either the ABR and ERO groups (P < 0.0113). / Revisión por pares Acid Etching, Dental Animals Bisphenol A-Glycidyl Methacrylate Carbonated Beverages Cattle Composite Resins Dental Bonding Dental Enamel Dental Materials Dental Stress Analysis Dentin-Bonding Agents Humans Microscopy, Electron, Scanning Phosphoric Acids Stress, Mechanical Surface Properties Tensile Strength Time Factors Tooth Abrasion Tooth Erosion Toothbrushing

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