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 46 for “"Pathfinding"”.
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Fast and optimal pathfinding
Pathfinding (or navigating) from A to B is a common problem in Computer Science with broad practical applications in areas as diverse as digital entertainment, logistics and robotics. Pathfinding is made difficult when many variations, or symmetries, of the same path exist. Symmetry slows down …
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Fast and optimal pathfinding
Pathfinding (or navigating) from A to B is a common problem in Computer Science with broad practical applications in areas as diverse as digital entertainment, logistics and robotics. Pathfinding is made difficult when many variations, or symmetries, of the same path exist. Symmetry slows down …
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Enhancements to Hierarchical Pathfinding Algorithms
<p>In this thesis we study the problem of pathfinding in static grid-based maps. We apply the approach of abstraction and refinement. We abstract the grid map into a graph representation, and use the classic A* algorithm to search for a path in the abstract space, and then refine it into low-level …
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Abstraction Hierarchies for Multi-Agent Pathfinding
<p>Multi-Agent Pathfinding is an NP-Complete search problem with a branching factor that is exponential in the number of agents. Because of this exponential feature, it can be difficult to solve optimally using traditional search techniques, even for relatively small problems. Many recent optimal …
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A robust pathfinding algorithm using chemical composition
Metabolic pathfinding is the task of finding preferred metabolic pathways from metabolic large reaction databases. Representing metabolism via networks enables quick enumeration of paths between two compounds. Automated pathfinding helps in working with ever increasing databases if reactions and in …
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Field D* pathfinding in weighted simplicial complexes
The development of algorithms to efficiently determine an optimal path through a complex environment is a continuing area of research within Computer Science. When such environments can be represented as a graph, established graph search algorithms, such as Dijkstra’s shortest path and A*, can be …
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Performance Evaluation of Competing Data Structures in Pathfinding
Pathfinding is an essential part of many applications, including video games and robot navigation. A pathfinding algorithm usually finds a path from the given starting point to the endpoint. Many different implementations of pathfinding solutions exist in the industry. One of the most known and …
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Investigating the Role of MicroRNAs in Regeneration and Axonal Pathfinding
During both development and regeneration, axons must navigate through a complex and changing environment to reach their proper synaptic target. To do so, axons utilize a specialized structure, the growth cone, which senses and interprets guidance cues in its surrounding environment to change the …
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Growth Cone Pathfinding and Neuromuscular Synaptogenesis in Drosophila Midline Mutants
… midline decisions affect subsequent growth cone pathfinding. Results showed that despite abnormal decisions at the midline, subsequent pathways and synaptic targeting in all cases were the perfect mirror-images of those seen in wildtype. This suggests that a growth cones' particular molecular …
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System of Systems Composition and Course of Action Pathfinding Tool (CNCPT)
The CnCPT Framework enables systematic exploration of the optimal configurations for large-scale complex system of systems architectures. CnCPT provides a straightforward and systematic approach to rapidly develop viable architectural concepts by having users focus on the fundamental constraints of …
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Repulsive axonal pathfinding requires the Ena/VASP family of actin regulatory proteins in vertebrates
… of the axonal path. Here I describe axon pathfinding defects displayed by mice genetically deficient for all three vertebrate Ena/VASP homologues: Mena, VASP, and EVL. As has been reported previously in invertebrates, these defects share phenotypic overlap with those seen in mice …
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Co-factors of LIM-HD transcription factors in neural development and axon pathfinding in zebrafish
… a specific programme for zebrafish motor axon pathfinding I established a method to selectively block motor axon pathfinding by interfering with LIM domain transcription factor signaling. LIM homeodomain proteins (LIM-HDs) are an important class of transcriptional regulators and involved in …
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The Intracellular Domain of EPHB1 Is Required for Axon Pathfinding at the Optic Chiasm and Corpus Callosum
… EphB receptor tyrosine kinases direct axonal pathfinding through interactions with ephrin-B proteins following axon-cell contact. Since EphB:ephrin-B binding leads to bidirectional signals, the contributions of signaling into the Eph-expressing cell (forward signaling) or the ephrin-expressing …
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Thewingless Signaling Pathway Specifies Fates in the Drosophila Embryonic CNS
… in altered GMC4-2a cell fate and faulty RP2 axon pathfinding. In addition to the RP2 motoneuron, hkb also regulates axon pathfinding of two other motoneurons deriving from NB4-2.
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The wingless signaling pathway specifies fates in the Drosophila embryonic CNS
… in altered GMC4-2a cell fate and faulty RP2 axon pathfinding. In addition to the RP2 motoneuron, hkb also regulates axon pathfinding of two other motoneurons deriving from NB4-2.
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The Role of Slit/Robo Signalling in Peripheral Nerve Regeneration
… signalling has been shown to play a role in axon pathfinding during the development of the central nervous system. There is evidence that Slit/Robo are expressed in the adult intact and injured peripheral nervous system. Owing to their role in axon pathfinding during development it is plausible …
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Interplay between Piezo1-mediated mechanosensing and the chemical guidance cue Semaphorin3A during development of the embryonic nervous system
… fully understand the mechanisms underlying axon pathfinding. In this project, I used the embryonic Xenopus laevis optic pathway as a model to study how axons navigate so precisely to their destination. Here, retinal ganglion cells (RGCs) send their axons out of the retina, to cross with axons of …
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In vivo and in vitro guidance of developing neurons by mechanical cues
… however, the role of mechanical cues in axon pathfinding in vivo, and the spatiotemporal dynamics of embryonic brain mechanics, are still largely uncharacterised. Here, I have identified a role for tissue mechanics in embryonic axon guidance in vivo, using retinal ganglion cell (RGC) axon …
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Adaptive Path Following of the Biomorphic Hyper-Redundant Snake Robot in Unconstructed Environment
… for a class of snake robots and implemented pathfinding and following, which is the challenging and practical problem in control of snake robots. In this dissertation, we first investigate straight line path-following problems for a class of planar underactuated snake robots. For this …
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Evaluating Simulink HDL coder as a framework for flexible and modular hardware description
… end. An FFT-based signal analyzer served as a pathfinding application to better understand the tools. In order to directly evaluate the ability of the workflow to faithfully recreate hardware operations, an existing architecture for nonlinear equalization was re-implemented and benchmarked. …
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