Thesis (M.S.)--University of Michigan, 1985.

Thesis (M.A.)--Kutztown University of Pennsylvania, 1999. / Source: Masters Abstracts International, Volume: 45-06, page: 2852. Typescript. Abstract appears on leaves [i]-ii. Includes bibliographical references (leaves 101-108).

Thesis (M.S.)--Western Washington University, 2006. / Includes bibliographical references (leaves 63-69). Also available online (PDF file) by a subscription to the set or by purchasing the individual file.

Justina Goldbeck Artist Statement My work explores themes of supernatural alternate universes and humans interaction with nature. Using the medium of photography I strive to create impossible realities, juxtaposing the real and the imagined. My work portrays mystical women interacting with surreal environments and seeks to portray the simple act of existing nature as a magical and spiritual experience. As a female artist my work has often been criticized for being too beautiful and for this reason, void of substance. I believe that beauty has inherent value and goodness. My photos celebrate the beauty of female strength and the unmarred landscape. The mirror to me represents negative stereotypes of superficiality attributed to women female created art. Male painters and photographers thought history have become famous for portraying the passive female form. However, selfies or other images taken of women and by women are considered exercises in vanity. This series seeks to challenge that narrative. The mirrors in my images add depth to the piece, showing a perspective one would not see otherwise. In most images the mirrors obscure the subject and reflect the environment she is in, uniting women with nature, and revealing something deeper within the subject. Photographs are taken far away from civilization and are not preplanned and are constructed without the use of elaborate technology. My practice is rooted in exploring, discovering new landscapes and new ways to photograph them. My work is notably not manipulated in photoshop. All of the seemingly impossible elements of the pieces are created in camera using mirrors and strategically placed colored camping lights. This lack of manipulation is intended to challenge the idea that images reflect unadulterated reality. It is also to contradict the idea that anything impossible must be photoshopped. My work is influenced by magical realism as well as surrealist photography. As a female photographer working with female subjects it is important to me to escape the traditional relationship between active artist and passive subject. Each photo I take is a collaboration with my female subject as well as a collaboration with nature. Through my photos I seek to emphasize a non objectified female form as she interacts with nature and portray my subject as a magnetic and powerful force uniting in spirit with her natural environment.

This work deals with the problem of accurately rendering mirror reflections on curved surfaces in real-time. While planar mirrors do not pose a problem in this area, non-planar surfaces are nowadays rendered mostly using environment mapping, which is a method of approximating the reflections well enough for the human eye. However, this approach may not be suitable for applications such as CAD systems. Accurate mirror reflections can be rendered with ray tracing methods, but not in real-time and therefore without offering interactivity. This work examines existing approaches to the problem and proposes a new algorithm for computing accurate mirror reflections in real-time using accelerated searching for intersections with depth profile stored in cubemap textures. This algorithm has been implemented using OpenGL and tested on different platforms.

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https://dc.etsu.edu/entc-2170-oer/1005/thumbnail.jpg

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A subaperture configuration to test aspheric optical components or systems is developed. The method developed has potential for testing rotationally symmetric aspheres without the use of null lenses. The aperture is divided into annular subaperture regions and an interferometer is refocused for each region to reduce the fringe density. Essential mathematical treatments involving annular subapertures, such as annular Zernike polynomials, are provided in detail. Numerical and experimental validations of the algorithm are described. Tolerance analyses on subaperture measurements are given. Computer programs were written to link the subaperture Zernike coefficients and to determine the full-aperture Zernike coefficients.

Plasma-wall interaction plays an essential role in the performance and safety of a fusion reactor. This thesis focuses on the impact of material migration on plasma-facing components. It is based on experiments performed in tokamaks: JET, TEXTOR and ASDEX Upgrade. The objectives of the experiments were to assess fuel and impurity removal under ion cyclotron wall conditioning (ICWC) and plasma impact on diagnostic mirrors. In wall conditioning studies, tracer techniques based on the injection of rare isotopes (15N, 18O) were used to determine conclusively the impact of the respective gases. For the first time, probe surfaces and wall components exposed to ICWC were examined by surface analysis methods. Discharges in hydrogen were the most efficient to erode carbon co-deposits, resulting in a reduction of the initial deuterium content by a factor of two. It was also found that impurities desorbed under ICWC are partly re-deposited on the wall. Plasma impact on diagnostic mirrors was determined by surface analysis of test mirrors exposed at JET. Reflectivity of mirrors from the divertor region was severely decreased due to deposits of beryllium, deuterium, carbon and other impurities. This result points out the need to develop mirror maintenance procedures. Neutron damage on mirrors was simulated by ion irradiation in an ion implanter. It was shown that damage levels similar to those expected in the first wall of a fusion reactor do not produce a significant change in reflectivity. / <p>QC 20160819</p>