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 24 for “"landmark-based"”.
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Visibility analysis of landmark-based navigation
… gallery problem asks for the minimum number of landmark classes required to ensure that every point in an input polygon sees at least one landmark but sees no more than one landmark of any particular class. The problem is motivated by partially distinguishable landmark-based navigation. A robot …
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The use of landmark-based wayfinding strategies across the adult lifespan
Individuals can employ different landmark-based wayfinding strategies to acquire spatial knowledge and support navigation. Allocentric strategy use is associated with a cognitive representation of a learned environment that allows flexible navigation, while egocentric strategy use is associated …
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Uncertainty Quantification of Tightly Integrated LiDAR/IMU Localization Algorithms
… First, we focus on sensor augmentation for landmark-based localization. We develop new IMU/LiDAR integration methods that guarantee a bound on the integrity risk, which is the probability that the navigation error exceeds predefined acceptability limits. IMU data improves LiDAR position and …
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Gender and Menstrual Cycle Effects in Human Spatial Cognition
… and menstrual phase in younger women also affect landmark dependence in navigation. When describing a learned virtual reality environment, women report a higher percentage of responses concerning landmark objects, while men produce a higher percentage of responses pertaining to directions and …
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Driving by Speaking: Natural Language Control of Robotic Wheelchairs
… algorithms have been tested for destination-based and landmark-based navigation and perform well on simple commands.
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Persistent autonomous exploration, mapping and localization
… uncertainty in its map. Third, we implemented a landmark-based topological mapping method using a state-of-the-art toolbox that maps the environment using visually unique tags to compare with metric mapping methods. Our analysis shows that the robot explores its environment more efficiently using …
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Three-dimensional Surface Changes in the Mandible during Growth and Development
… and development remains reminiscent of the landmark-based cephalometric analyses used in two-dimensional studies. The objective of this study was to identify 3D topographical changes of the mandible during growth and development of adolescent orthodontic patients. Nine pairs of pre- and …
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Multi-robot cooperative surveillance in unknown environments
… distributed algorithms such as potential field-based exploration, swarm intelligence exploration, landmark-based exploration, and hop-count gradient-oriented searching, are proposed. With respect to target tracking, an artificial potential field-based intelligent tracking algorithm is proposed …
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Landmark Analysis of Musteloid Carnassials Applied to Taxonomic Identification and Examination of Sexual Dimorphism and Regional Morphotypes
… holds many late Pleistocene mammal fossils. Based on visual morphology, several partial mandibles with lower carnassial from GWC appeared to be musteloids. Geometric morphometrics has been successfully used to identify fragmentary fossils, so a landmark based, 2 dimensional technique was …
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Identifying Myotis Species Using Geometric Morphometrics and its Implications for the Fossil Record and Conservation
… in the eastern United States were analyzed using landmark-based geometric morphometrics. The species could be distinguished with a high degree of accuracy. Evidence was found of a phylogenetic signal in the morphology of the Neotropical and Nearctic <em>Myotis </em>sub-clades. There is also …
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Integrating SLAM-DUNK and variable rate particle observers for fast multi-hypothesis SLAM
… was tackled using a combination of an existing landmark-based SLAM algorithm called SLAM-DUNK and a particle filter inspired approach. SLAM-DUNK is a recent Kalman Filter-based algorithm for landmark tracking that scales linearly with the number of landmarks and converges globally to true …
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Characterization of the facial phenotype associated with fetal alcohol syndrome using stereo-photogrammetry and geometric morphometrics
… The design and implementation of a landmark-based stereo-photogrammetry system to obtain 3D facial information for fetal alcohol syndrome diagnosis (FAS) is described. The system consists of three high resolution digital cameras resting on a purpose-built stand and a control frame …
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State Estimation in Dynamical Robotic System with Non-Gaussian Noise
… two point clouds. We propose a simple approach based on Expectation-Maximization (EM) and establish theoretical conditions under which the EM approach recovers to the ground truth. We evaluate the approach in simulated and real datasets ranging from table-top scenes to self-driving scenarios and …
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Autonomous underwater vehicle navigation and mapping in dynamic, unstructured environments
… constraints are introduced into the pose graph based on multibeam submap matching using depth image correlation, while landmark-based constraints are used in the graph where visual features are available. The two types of constraints work in concert in a single optimization, fusing information …
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From Bones to Bytes
… framework spanning tabular osteometric data, landmark-based morphology, and landmark-free three-dimensional shape analysis. Using sheep and gazelle bones from modern and archaeological populations, it investigates sex-related variation, automated landmarking, and inter-species discrimination …
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The ecomorphology of facultative bipedality in Lepidosauria: implications for the evolution of reptilian bipedality
… contrasting with historical tropes. Using 3D landmark-based geometric morphometrics, I demonstrate that arboreal and facultatively bipedal species share many characteristics in the bony elements of the pelvis, including a straight-to-concave iliac blade and large ischial base. These shared …
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Biological and bio-inspired morphometry as a route to tunable and enhanced materials design
… rules with morphometry (geometry or shape-based rules) to create high-performance, multi-functional structures that exhibit tunable properties through extraordinary complexity, hierarchy, and precise structural control. This thesis explores the use of morphometry as a materials design …
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Autonomous underwater vehicle navigation and mapping in dynamic, unstructured environments
… constraints are introduced into the pose graph based on multibeam submap matching using depth image correlation, while landmark-based constraints are used in the graph where visual features are available. The two types of constraints work in concert in a single optimization, fusing information …
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Towards Object-based SLAM
… more than two decades from the original sparse landmark-based SLAM to dense SLAM, and now there is a demand for semantic understanding of the environment beyond pure geometric understanding. This thesis delves into object-based SLAM where the map consists of a set of objects with their semantic …
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Dynamics of Multi-Agent Systems with Bio-Inspired Active and Passive Sensing
… model is a well-established flocking model based on alignment of individuals with their neighbors in the presence of noise. We studied the aligned motion in a group in which the agents employ both active and passive sensing. Our study shows that the group behavior is less sensitive to …
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