Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 66 for “"contouring"”.
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Digital Holography and Optical Contouring
… such systems.• Two-source arrangements for contouring, including investigating the limitations on achievable accuracy with such systems.Regarding the numerical processing, the thesis focuses on three main areas. Firstly, the numerical calculation of the Fresnel-Kirchhoff integral, which is …
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Evaluation of massive weight loss body contouring
… new validated tool for massive weight loss body contouring.
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Development of computer-based algorithms for unsupervised assessment of radiotherapy contouring
… control probability and impact clinical outcome. Contouring assessments are performed to ensure high quality of target volume definition in clinical trials but this can be subjective and labour-intensive. This project addresses the hypothesis that computational segmentation techniques, with a …
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Absolute distance contouring and a phase unwrapping algorithm for phase maps with discontinuities.
… describes a new technique, absolute distance contouring, and a phase unwrapping algorithm for phase maps with discontinuities. Absolute distance contouring, which is based on the shadow moire method, using the rotation of a grating, is a technique which can be used for the measurement of …
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Experimental Study of Gas Turbine Endwall Cooling with Endwall Contouring under Transonic Conditions
… the surface with minimum coolant usage. Endwall contouring on the other hand provides an effective means of minimizing heat load on the platform through efficient control of secondary flow vortices. Complex vortices form due to the interaction between the incoming boundary layer and …
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The Effect of Endwall Contouring On Boundary Layer Development in a Turbine Blade Passage
… Three-dimensional (non-axisymmetric) contouring of the endwall surface has been shown to reduce aerodynamic losses, but the effect of the contouring on endwall heat transfer is not well understood. This research focused on understanding the general flow physics of contouring and the …
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Aerodynamic Performance of High Turning Airfoils and the Effect of Endwall Contouring on Turbine Performance
… loss measurements. The application of endwall contouring to reduce secondary losses is investigated to try and understand when contouring can be beneficial. A detailed study was conducted on the effectiveness of endwall contouring on two different blades with varying airfoil spacing. Heat …
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Design of a high-speed-force-stroke thermomechanical micro-actuator via geometric contouring and mechanical frequency multiplication
… This work has generated two concepts - geometric contouring and mechanical frequency multiplication that make jtTMAs behave in a manner that is very different from how they have acted in the past: (1) Geometric contouring:
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Aerodynamics of Endwall Contouring with Discrete Holes and an Upstream Purge Slot Under Transonic Conditions with and without Blowing
Endwall contouring has been widely studied as an effective measure to improve aerodynamic performance by reducing secondary flow strength. The effects of endwall contouring with discrete holes and an upstream purge slot for a high turning (127") airfoil passage under transonic conditions are …
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Aerodynamic performance of a transonic turbine blade passage in presence of upstream slot and mateface gap with endwall contouring
The present study investigates mixed out aerodynamic loss coefficient measurements for a high turning, contoured endwall passage under transonic operating conditions in presence of upstream purge slot and mateface gap. The upstream purge slot represents the gap between stator-rotor interface and …
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Development of a robust numerical optimization methodology for turbine endwalls and effect of endwall contouring on turbine passage performance
Airfoil endwall contouring has been widely studied during the past two decades for the reduction of secondary losses in turbine passages. Although many endwall contouring methods have been suggested by researchers, an analytical tool based on the passage design parameters is still not available for …
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Investigation of the Effects of an Upstream Cavity on the Secondary Flow in Transonic Turbine Blade Passages with Endwall Contouring
… the viability of using non-axisymmetric endwall contouring to reduce endwall losses, including those generated by the presence of an upstream cavity, using a modern airfoil, at HP turbine representative speeds and at off-design Mach numbers. To attempt to achieve this, a combination of flow …
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Quantum Computing Based Image segmentation for Treatment Planning Applications
… currently available quantum computing-based auto-contouring methods to image segmentation. These implementations serve as prototypes of existing quantum algorithms tailored for specific quantum hardware, specifically focusing on the auto-contouring of medical imaging. We evaluated these algorithms …
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Individual Welfare Maximization in Electricity Markets Including Consumer and Full Transmission System Modeling
… visualization routine for power system analysis: contouring. The contouring algorithm is demonstrated to be useful in visualizing bus-based and transmission line-based quantities.
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Body Image and Quality of Life Among Postsurgical Bariatric Patients
… surgical procedures to remove excess skin (“body contouring”), which are also associated with positive medical and psychological outcomes.</p> <p>The present study sought to expand upon existing research into the psychosocial outcomes of bariatric surgery, investigate correlates of patients’ …
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The Visualisation and Expression of Virtual 3D Surfaces Explored through Custom Developed Interactive Software, Optically Mixed Coloured Surface Contouring and Fine Art Printmaking
… interactive software program used a novel contouring upon the surface of virtual 3D objects. The object's colour is intrinsic to the structure of this surface contour and is achieved through an innovative system comprising the juxtaposition of narrow coloured lines (CMYK) which then produce …
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Body Contouring in Patients with Obesity and After Massive Weight Loss // Контуриране на тялото при пациенти със затлъстяване и след масивна загуба на тегло
Massive weight loss has been a leading cause of soft tissue ptosis in all areas of the body. The skin excess is known to be both an aesthetic and a functional issue for patients. This could be a possible cause of an infection in the area of the weight loss. Surgical procedures aiming to achieve …
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The role of magnetic resonance imaging (MRI) in external beam radiotherapy treatment planning (RTP) for cervical cancer
… intervention resulted in an improvement in contouring the gross tumour, however a variable response for the other target volumes was observed. MRI contouring was associated with less variability between clinicians compared to CT contouring for most structures including the gross tumour, …
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Automated to ols for Contour Review in Radiotherapy
… especially with the wide adoption of auto-contouring to clinical practice, we aim to mitigate time and specialty resource shortages to this critical clinical practice.</p> <p>The purpose of this study was to develop automated tools that can accurately identify sub-optimal contours …
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