Thesis (Ph.D.)--George Mason University, 2008. / Vita: p. 131. Thesis director: Daniel B. Carr. Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Computational Sciences and Informatics. Title from PDF t.p. (viewed Aug. 28, 2008). Includes bibliographical references (p. 123-130). Also issued in print.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1992. / Vita. Abstract. Includes bibliographical references (leaves 77-80). Also available via the Internet.

Dissertation (Ph.D.) -- Worcester Polytechnic Institute. / Keywords: Multi-Dimensional Visualization; High-Dimensional Data Set; Information Visualization; Framework; Visualization; Multi-Resolution. Includes bibliographical references (p. 172-186).

Thesis (Ph. D.)--Oregon State University, 1995. / Typescript (photocopy). Includes bibliographical references (leaves 351-354). Also available on the World Wide Web.

Thesis (M.S. in Aeronautical Engineering)--Naval Postgraduate School, June 1990. / Thesis Advisor(s): Hebbar, S. K. ; Platzer, M. F. "June 1990." Description based on title screen as viewed on October 19, 2009. DTIC Descriptor(s): Angles, yaw, scale models, attack, motion, rates, moments, vortices, flow visualization, rupture, asymmetry, aerodynamic forces, leading edges, range(distance), statics, hysteresis, aerodynamics, high angles, pitch(motion). DTIC Indicator(s): Flow visualization, trailing vortices, F/A-18 aircraft. Author(s) subject terms: High angle of attack aerodynamics, effect of pitch rate and yaw, vortex development and bursting, flow visualization by dye injection, water tunnel studies, F/A-18 fighter aircraft. Includes bibliographical references (p. 44-45). Also available in print.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaves 116-118). Also available via the Internet.

Thesis (Ph. D.)--Ohio State University, 2006. / Available online via OhioLINK's ETD Center; full text release delayed at author's request until 2007 May 25

We present an algorithm for overlaying polygonal data with regular grids and calculating the percentage overlap for each cell in the regular grid.  Our algorithm is able to support self-intersecting polygons, meaning that some spatial regions may be covered by two or more polygons.  Our algorithm is able to identify these cases and eliminate redundant polygons, preventing erroneous results.  We also present an optimized version of our algorithm that uses spatial sorting through interval trees, and provide a performance comparison between the optimized and unoptimized versions. Finally, we apply our algorithm to geography data, specifically of bark beetle infestation

Master of Science / Department of Mechanical and Nuclear Engineering / Mohammad Hosni / A typical refrigeration loop is composed of an evaporator, compressor, condenser, and an expansion valve. There are many possible refrigerants that can be used, but the physical properties of water make it ineffective in the traditional refrigeration loop. But if water could be used it would have many advantages as it is abundant, cheap, and is safe for the environment. This research focuses on a different kind of refrigeration loop using water. This new refrigeration loop utilizes water flowing through a nozzle, initiating cavitation. Cavitation is generally defined as creating vapor from liquid, not through adding heat, but by decreasing the pressure. In a converging/ diverging nozzle, as the cross sectional area is constricted, the velocity of the flow will increase, decreasing the pressure. Therefore, by flowing water through the nozzle it will cavitate. Transforming liquid into gas requires a certain amount of energy, defined as the latent heat. When a liquid is turned to vapor by an increase in the temperature, the latent heat is provided by the heat transfer to the system. As no energy is being added to the nozzle to cause the cavitation, the energy transfer to create the vapor comes from the remaining liquid, effectively causing a temperature drop. This research focused on the flow visualization of water cavitating as it travelled through a converging/ diverging nozzle. Under different flow conditions and different nozzle geometries, the cavitation manifested itself in different formations. When gasses were entrained in the water they formed bubbles, which acted as nucleation sites as they moved through the nozzle. This was called travelling bubble cavitation. In venturi nozzles the cavitation nucleated off of the wall, forming attached wall cavitation. When water flowed out of an orifice, a turbulent mixture of liquid and vapor, orifice jet, was formed which caused vapor to form around it. This was known as shear cavitation. When the water was rotated prior to the throat of an orifice, the orifice jet expanded radially and formed swirl cavitation. In addition to studying how the cavitation was formed, the void fraction and velocity were measured for attached wall cavitation.

University of Macau / Faculty of Social Sciences / Department of Communication