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 23 for “"3D Maps"”.
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Chatbots and 3D maps : evaluating information retrieval across multiple mediums
In this thesis, we present data retrieval accomplished through two extremes of affordance. First, a natural language understanding (NLU) driven chatbot, which has minimal affordance -- the only visual cue users are given is an empty text box, an initial greeting message, and a list of general …
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Robot search and rescue : a comparison of 3D mapping techniques
… need extensive knowledge of their surroundings. 3D mapping allows for the creation of such complex maps, and here we explore some of the options available for the creation of 3D maps. We consider using 2D and 3D sensors to see how helpful the extra information is.
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Designing Future Interactions for Situated Extended Reality Maps
… I explore the interaction and visualization of maps situated in Extended Reality (XR) environments, with a focus on innovative approaches to map navigation and manipulation suited to various domains, including cartography, geosciences, architecture, and building information management. In …
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Robust and efficient methods for proton computed tomography.
… modality with the goal of generating accurate 3D maps of relative stopping power (RSP) with respect to water. Since the early developments of this imaging technique in 1970's, there have been significant improvements regarding the reconstruction of accurate RSP which makes pCT a reliable …
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Structural characterisation of V-ATPases by electron microscopy
… digital image processing. Three-dimensional (3D) maps were calculated of the plant V-ATPase – both in the presence and the absence of a non-hydrolysable ATP analogue (AMP-PNP) – and the fungal V-ATPase. <br>In the 3D maps, the details of the three-dimensional organisation of the stalk region …
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Real-time Topology-Aware Augmented Reality
… the quality of point cloud-based real-world 3D map reconstruc- tions for topology-aware AR systems. The reconstructed 3D maps provide information to improve the registration accuracy between virtual objects and the physical environment. Furthermore, 3D maps also help to reduce registration …
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Three-dimensional interactive maps - theory and practice
Maps are among the oldest and the most popular forms of graphical communication, which have always been highly regarded for high efficiency of information transfer. Regardless of how efficient twodimensional maps are, three-dimensional interactive maps offer significant improvements and benefits …
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Mapping exoplanet clouds and albedo from phase curves and spectra
… its clouds, albedo and phase curves. We create 3D maps of cloud formation and analyze how cloud composition, spatial distribution, and temperature dependence affects albedo spectra for HD189733b. We use the modeled cloud patterns of spatially-varying composition and temperature to determine the …
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Mapping and Localization Using LiDAR Fiducial Markers
… due to the sparse, unstructured nature of 3D LiDAR data and 2D-focused fiducial marker designs. This dissertation proposes a novel framework for mapping and localization using LFMs is proposed to benefit a variety of real-world applications, including the collection of 3D assets and …
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3D organ property mapping using freehand ultrasound scans
3D organ property mapping has gained a considerable amount of interest in the recent years because of its diagnostic and clinical significance. Existing methods for 3D property mapping include computed tomography (CT), magnetic resonance imaging (MRI), and 3D ultrasound (3DUS). These methods, while …
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The Mapkey: Preliminary Design, Construction and Testing of a Novel UAV Platform for Cavity Surveying
… unmanned aerial vehicle (UAV) for gathering 3D maps of underground cavities. The novel UAV is called "The Mapkey". Current underground cavity surveying is conducted by using a stationary light detection and ranging (LiDAR) sensor extended into a void to collect a 3D point cloud. This method …
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Assessment of Brain Perfusion and Vascular Compliance with Magnetic Resonance Imaging
… and publicly accessible. Quantitative CBF maps and region-specific reports are available for download within minutes. I have launched this cloud service recently and received initial feedback from researchers around the world. Finally, I developed a technique to measure vascular compliance …
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Frequency and time domain analysis of carbon nanotubes with realistic shape and distribution
… this work is to use experimentally characterized 3D CNT maps to study the effect of distribution and shape of the CNTs on the electromagnetic properties of the composite. Recently, electron tomography techniques have advanced to the point that they are capable of generating 3D maps of Multi-Walled …
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Modeling Forest Canopy Distribution from Ground-Based Laser Scanner Data
… Data were translated into three dimensional (3D) point clouds with points corresponding to surfaces visible from the scanner vantage point. A 20 m x 40 m permanent plot located in upland deciduous forest at Coweeta, NC was assessed with 41 and 45 scans gathered during periods of leaf-on and …
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Design for pre-bond testability in 3D integrated circuits
… we propose several DFT techniques specific to 3D stacked IC systems. The goal has explicitly been to create techniques that integrate easily with existing IC test systems. Specifically, this means utilizing scan- and wrapper-based techniques, two foundations of the digital IC test industry. …
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Treslin and its role in the assembly of the replicative DNA helicase
… and medium-resolution of MCM single hexamer 3D maps were obtained through single-particle cryo-electron microscopy (cryo-EM) analyses. The results provide molecular basis for Treslin’s role in the assembly of the CMG complex. Treslin acts as a molecular chaperone for Cdc45 recruitment to the …
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Characterizing Medial Temporal Lobe Neurodegeneration Due To Tau Pathology In Alzheimer's Disease Using Postmortem Imaging
… and intensity-based framework to construct a 3D probabilistic atlas of the MTL, and 2) a surface-based approach which provides implicit registration between specimens by applying a topological unfolding framework to the MTL. As part of this work, we present a first-of-its-kind 3D computational …
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Improving the robustness of GPS direct position estimation
… estimated from available three-dimensional (3D) maps. We conducted experiments in front of the 50~m by 40~m wind tunnel located at NASA's Ames Research Center in Mountain View, California, utilizing the surface of the wind tunnel as a reflector of GPS signals. We demonstrated through our …
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Chemical pressures in crystalline solids
… cristalina es posible construir mapas 1D, 2D y 3D de presiones químicas. Estos mapas sirven para identificar con claridad las regiones responsables de las atracciones y repulsiones que dan lugar a la cohesión en todos los sistemas cristalinos explorados. Enlaces, pares solitarios, dominios de …
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Autonomous vision-based inspection of RC railway bridges for rapid post-earthquake response and recovery
… strategy that builds three-dimensional (3D) maps of the environment, where target structural components (columns) are represented by rectangular prismatic shapes. Based on the 3D column detection results, waypoints for performing rapid structural inspection are determined. The fourth …
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