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 16 of 16 for “"Regions of Space"”.
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Attention to Non-Contiguous Locations of the Visual Field
… that attention can be allocated to noncontiguous regions of space as long as sudden-onsets do not appear between the attended locations. We hypothesized that subjects could allocate attention over noncontiguous locations of the visual fields, but may not be able to maintain the multiple foci if …
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Doppler global velocimetry measurements in a wing flow field with tip blowing
… technique. DGV measures the Doppler shift of the frequency of the light scattered by seed particles at a specific location. The velocity of the particles is related to the Doppler shift.;DGV measurements were made in the WVU low speed wind tunnel on a turbulent jet and on a NACA 2412 …
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Geometric Possibility, Ideological Parsimony, and Monistic Substantivalism
… believe that material objects and regions of space-time are not two distinct kinds of fundamental of entities. For the monist, objects either are identical with regions or are somehow derivative from them. Dualistic substantivalists view regions and objects as distinct kinds of …
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Wavelets and wavelet optimized-finite differences for electronic structure calculations
… the problem by using a spatially-varying level of resolution. A wavelet basis can efficiently represent a function which is rapidly varying in certain regions of space. One-dimensional calculations using Daubechies wavelets as an adaptive basis have been performed, showing that a compressed …
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Low-latency trajectory planning for high-speed navigation in unknown environments
… factor computing has allowed the application of state-of-the-art perception and planning algorithms to the high-speed navigation problem. However, many of the existing algorithms are computationally intensive and rely on building a dense map of the environment. Computational complexity and map …
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Speculative ray scheduling for large data visualization on supercomputers
… global illumination is inefficient because of the I/O overhead incurred by rays migrating from one partition to another. For such data, ray scheduling methods have demonstrated improved rendering performance by amortizing costs across a large group of rays. However, ray schedulers are prone …
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Generating Relation Algebras for Qualitative Spatial Reasoning
Basic relationships between certain regions of space are formulated in natural language in everyday situations. For example, a customer specifies the outline of his future home to the architect by indicating which rooms should be close to each other. Qualitative spatial reasoning as an area of …
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On the Gap-Tooth direct simulation Monte Carlo method
… dilute gases combined with the Gap-tooth method of Gear, Li, and Kevrekidis. The latter was proposed as a means of reducing the computational cost of microscopic (e.g. molecular) simulation methods using simulation particles only in small regions of space (teeth) surrounded by (ideally) large …
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Control of neutral atoms in optical lattices
… examine several problems related to the control of neutral atoms for quantum computation and simulation. In the first problem we show how the transport of atoms in an optical lattice can be controlled through variation of the polarization of the optical lattice and the application of global …
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Particle physics in the sky and astrophysics underground : connecting the universe's largest and smallest scales
… particle physics. This thesis encompasses both of these research directions. Many models predict a diffuse flux of high energy neutrinos from active galactic nuclei and other astrophysical sources. The "Astrophysics Underground" portion of this thesis describes a search for this neutrino flux …
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A surface texture modeling system for solid freeform fabrication
Solid Freeform Fabrication, SFF, is a set of manufacturing processes that fabricates parts as a bonded stack of individual layers. The Three Dimensional Printing process, 3DPTM process, is an SFF technology developed at MIT. It builds layers by ink jet printing binder onto the surface of a bed of …
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High-resolution infrared spectroscopy in pursuit of C60 and other astrochemical targets
… work is primarily concerned with the development of a mid-infrared cavity ringdown spectrometer with the intent of observing rotationally-resolved vibrational spectra of C60 and other astronomically relevant molecules, including the polyoxymethylene 1,3,5-trioxane. C60 was first discovered during …
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An object-oriented library for shared-memory parallel simulations
… speed increases. At the same time, this class of computer-based on standard microprocessors-is becoming increasingly common as an alternative to traditional mainframes and supercomputers. Programs that are not sympathetic to caches can perform poorly on such systems. Problems include false …
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Stimulus Integration and Parsing in the Primate Auditory Midbrain
… from multiple sources is a crucial function of the brain. Examples of such integration include multiple stimuli of different modalties, such as visual and auditory, multiple stimuli of the same modality, such as auditory and auditory, and integrating stimuli from the sensory organs (i.e. …
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Tight Discrete Formulations to Enhance Solvability with Applications to Production, Telecommunications, and Air Transportation Problems
… effectively. Two important characteristics of a general integer or mixed-integer program are its size (the number of constraints and variables in the problem), and its strength or tightness (a measure of how well it approximates the convex hull of feasible solutions). In designing model …