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 61 for “"Spatial structures"”.
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Navigation in unknown environment by building instantaneous spatial structures
… and geometric information to determine the spatial relations between the robot and the environment. Navigation in an unknown environment is still a challenging issue especially in the presence of cluttered objects or obstructions.There are two possible ways to path planning in an unknown …
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Spatial dynamics of microbial populations driven by social interactions and horizontal gene transfer
… microbial ecosystems are closely related to the spatial structures formed by microbial communities. Yet, it is not well understood what determines, controls and regulates the spatial dynamics of microbial populations. In this study, we use synthetic microbial consortia as our experimental models, …
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An arithmetical model of spatial definition
The manner in which spatial definition is built by architectural form is identified and formalised in part. A description is given for the structure of spatial definition. This description allows for a mapping from the class of uses to the class of spatial structures.
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Geometric techniques for molecular shape analysis
… such as proteins and DNA have complex spatial structures which are often important for their biological functions. The idea of molecular shape and shape complementarity play crucial roles in protein folding, conformational stability, molecular solubility, crystal packing, and docking. …
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Changing spatial structure of major Chinese cities
This paper examines the spatial structures of commercial real estate buildings (Offices, Retails) in four Chinese cities: Beijing, Shanghai, Shenzhen, and Guangzhou. In contrast to previous studies, this paper focused on the changes of the spatial pattern by involving the time variables to …
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An analysis of spatial percolation structures using a network approach
In this thesis we analyse several spatial structures, built from percolation models, by means of an approach used so far in the field of network science. In the first chapter we summarize the major network concepts and characterizations that have been obtained as regards the statistical properties …
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Phase transition induced deformation in porous media
… widely used in everyday life, yet their complex spatial structures lead to unresolved questions for statistical mechanics, both in- and out-of equilibrium. In this thesis I examine the mechanical consequences of capillary force and freezing transition in porous media, using cement, a construction …
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A feature-based framework for evaluating synthetic human mobility
… three real-world urban datasets with distinct spatial structures. Region-specific fine-tuning enhances realism, while persistent discrepancies in multi-scale entropy coefficients reveal challenges in modeling transitions between dwell and trip states. Incorporating road network information …
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Reconciling narrative spaces : conceptual blending in Saint-Exupery's The Little Prince and Calvino's Invisible Cities
… form, neglecting the crucial role that space and spatiality may play in some narratives. In this project, I use cognitive linguists Fauconnier and Turner's theory of conceptual blending to analyze two very different pieces of literature, Antoine de Saint-Exupery's The Little Prince and Italo …
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Structural investigation of the Trans World Airlines Flight Center
… a 1962 International Association of Shells and Spatial Structures paper, is reviewed and compared to a model constructed in Rhino 3D and tested using Karamba 3D parametric structural analysis software. The application of these digital tools can potentially allow far more inventive designs into …
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The robot's vista space : a computational 3D scene analysis
… that both partners know where they are, what spatial structures they are talking about, and what scene elements they are going to manipulate. This thesis focuses on the analysis of a robot's vista space. Mechanisms for extracting relevant spatial information are developed which enable the …
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Improving Profile Similarity Search and Alignment of Protein Sequences
… to detect many similarities evident from protein spatial structures. We present a new method, COMPADRE, to assess the relationship between the query sequence and a hit in the database by considering the similarity between the query and hit's known homologs. This method markedly boosts the homology …
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Large Eddy Simulation Reduced Order Models
This dissertation uses spatial filtering to develop a large eddy simulation reduced order model (LES-ROM) framework for fluid flows. Proper orthogonal decomposition is utilized to extract the dominant spatial structures of the system. Within the general LES-ROM framework, two approaches are …
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A study of reversed shear Alfvén eigenmodes in Alcator C-Mod with phase contrast imaging
… and sawtoothing phase are studied through the spatial and temporal characteristics of the RSAEs. Analysis of the spatial structures of RSAEs measured by phase contrast imaging, and interpreted with a synthetic diagnostic using numerical results from the ideal MHD code NOVA, provides constraints …
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Application of synchronisation theory to plankton patchiness
… this framework to gain insight into emergent spatial structure in biophysical simulations. The manifestation of synchronisation, including statistically stable local clustering of populations, frequency-locking or phase-locking of the entire ensemble and fully synchronised dynamics, is found …
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Motion -Compensated 3-D Generalized Series Imaging
… where simultaneous resolution of both small spatial structures and closely spaced temporal events is important. The research in this thesis is aimed at exploiting the generalized series (GS) framework to improve imaging efficiency for 3-D dynamic MR imaging. Several data acquisition, sampling …
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Exploring Passive Flow Control Techniques Applied to a Supersonic Multistream Rectangular Nozzle
… between the two streams and breaks up the shed structures seen previously. A wavenumber corresponding to one simulated was tested experimentally via the use of simultaneous nearfield pressure and velocity in conjunction with farfield acoustics. Farfield acoustic measurements have confirmed the …
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Labour and Geography in Ireland, 2006 Evaluating the National Spatial Strategy for Ireland 2002 - 2020: People, Places and Potential
This Ph.D. identifies the spatial structures associated with Ireland’s economic geography through an analysis of travel-to-work patterns. In doing so it applies, within the Irish context, novel techniques to identify local labour market areas using data that, heretofore, were unavailable to …
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Tidally Induced Transport Dynamics in a Wadden Sea Tidal Basin and Its Changes Under Future Sea Level Rise Scenarios
… atmospheric forcing. These interactions create spatial structures of hydrodynamic connectivity that govern transport processes, ecological functioning, and the interpretation of long-term observations. However, the persistence of these structures under future sea level rise and changing wind …
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