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.
Results
Showing 1 to 20 of 85 for “"Three Dimensional (3-D)"”.
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Three-dimensional finite element analysis of concrete pavement
A three-dimensional (3-D) finite element model for concrete pavements, called 3DPAVE, was developed in this study in order to analyze accurately the many complex and interacting factors which influence the support provided to a concrete pavement.
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Interactions of nucleons: their role in understanding the sun's origin, composition, and source of energy
… surface of all 2,850 known nuclides presented as three-dimensional (3-D) plots of mass or atomic number versus charge density versus average energy per nucleon"--Abstract, page iv.
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Integrated approach to three-dimensional motion analysis and object recognition
In this thesis, an integrated system for three-dimensional (3-D) motion analysis and object recognition with noisy outdoor stereo images as inputs is presented. The goals are to obtain the 3-D motion description and the identification of the object on the input stereo images. In order to accomplish …
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Investigations of three-dimensional optical transfer functions
The performance of two-dimensional image processing systems has been well documented. In this thesis we study the performance of three-dimensional imaging systems. Such a study helps in understanding the fundamental restrictions of the propagation of three-dimensional (3-D) wavefields. The …
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Reconstruction Enhancements with Optical Scanning Holography
… [1] has the benefit of recording the entire three-dimensional (3-D) volume of a specimen in the form of a two-dimensional (2-D) hologram. Reconstruction of the original volume can be accomplished by applying digital reconstruction or decoding techniques to the recorded hologram. Accurate …
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Investigation of refraction effects for small GPS networks
… System (GPS) satellites to determine a three dimensional (3-D) geodetic control network are considered. The repeatability of individual baselines and 3-D vector closures are examined, in order to investigate refraction effects on GPS networks. The effect on GPS baselines of a height bias …
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Medical image enhancement
… a medical imaging system is often part of a two-dimensional (2-D) image set whose total presents a three-dimensional (3-D) object for diagnosis. Unfortunately, sometimes these images are of poor quality. These distortions cause an inadequate object-of-interest presentation, which can result in …
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Nanostructured Origami (TM) : folding thin films out of the plane of a silicon wafer with highly stressed chromium hinges
This thesis addresses the construction of complex three-dimensional (3-D) nanostructures using only 2-D, planar nano-fabrication techniques. In the state of the art, multiple 2-D layers are fabricated in series, each directly on top of the previous. The method advocated here is Nanostructured …
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Microelectromechanical Systems (Mems) for Radio Frequency Applications
… low loss, and wide tuning range. Second, a novel three-dimensional (3-D) microstructure assembly technique, Plastic Deformation Magnetic Assembly (PDMA), is developed, which is compatible with the standard IC fabrication process and capable of addressing batch-scale assembly with high yield and …
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Mathematical models for interendothelial cleft
… on microvessel permeability, we extended the three-dimensional (3-D) junction-orifice-fiber matrix model developed by Fu et al. (1994) for the interendothelial cleft to include a negatively charged glycocalyx layer at the entrance of the interendothelial cleft. (Abstract shortened by UMI.).
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Development of 3-d liver model for drug screening applications
… The objective of this study was to engineer a three-dimensional (3-D) liver model using chitosan-based nanofiber scaffolds and co-culture system (adult rat hepatocytes and 3T3-J2 fibroblasts) to mimic the natural liver and to justify its application for in vitro drug screening. Chitosan …
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Computer Modeling of Silicon Quantum Dot Floating -Gate Flash Memory Devices
… involves the self-consistent solution of three-dimensional (3-D) Poisson and Kohn-Sham equations within the density functional formalism, where the quantum many-body interactions are treated according to the local-density approximation. We investigate the quantum-dot electronic structure, …
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Human factors engineering in sonar visual displays
… remotely operated vehicle (ROV) pilots with a three-dimensional (3-D), real-time display incorporating data from a wide variety of sensors including sonar (sound navigation and ranging), cameras, and lasers. Effective collection, computation, and presentation of this data to the pilot in a …
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Three-Dimensional Target Modeling with Synthetic Aperture Radar
… target functions and models are limited to two-dimensional images. This thesis first investigates some existing methods for the computation of target reflectivity data in the deficient elevation domain, and a new method is then proposed for three-dimensional (3-D) SAR target feature extraction. …
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Efficacy of retinal disparity depth cues in three-dimensional visual displays
Recent interest in three-dimensional (3-D) stereoscopic displays has prompted the need to assess the efficacy of retinal disparity depth cues. Accordingly, this study analyzed performance on two 3-D tasks under three levels of signal-to-clutter ratio as participants viewed three display formats …
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A Dynamical Analysis of Changing Direction During Walking
A dynamic analysis of the three dimensional (3-D) kinematic and kinetic characteristics of changing direction during walking was conducted which included examination of: the body segment contributions to the angular momentum about the center of mass of the whole body, coordination and control of …
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Assessing target centring algorithms for use in near-real-time-photogrammetry
… Camera System, has been developed over the past three years in the Surveying Department of UCT to provide a semi-automatic system to determine three dimensional co-ordinates of surfaces and objects using a photogrammetric method. Targets are attached to an object in order to facilitate …
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The Effect of the Incorporation of Heavy Metal Zeolites into 3-D Printed Surgical Guide Resin on the Surface Stability of SARS-CoV-2
… This study explores the development of a three-dimensional (3-D) printable material integrated with zeolites and heavy metals that would be used to produce healthcare-grade equipment on-demand. The study was conducted by exposing SARS-CoV-2 and human immunodeficiency virus 1 (HIV-1) to …
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The Role of Rac and Filamin A in Osteoclast Function and Osteoclast Heterogeneity
… function is best characterized through three-dimensional (3-D) volumetric analysis of resorption pits (Rpits). The success of this method prompted us to measure Rpits in osteoclasts lacking actin binding protein Filamin A (FLNA), which interacts with Rho GTPases to regulate osteoclast …
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An experimental study of methods to teach college students standard drink measures and pouring accuracy using the red cup
… drinking by evaluating the effectiveness of three methods for teaching standard drink measures to first-year college students. These methods include the use of numeric measures in ounces, two-dimensional (2-D) images, and three-dimensional (3-D) models. All of these represent the appropriate …
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