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 34 for “"spatial localization"”.
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Investigating Gaze Orientation and Spatial Localization in Strabismus
… factors that may impact gaze orientation and localization behavior in strabismus. These studies shed light on the mechanisms underlying binocular vision and spatial localization and provide insights into the temporal dynamics of visual suppression and its impact on eye-choice behavior. …
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Integration of exteroceptive and interoceptive cues in spatial localization
Contains fulltext : 91404.pdf (Publisher’s version ) (Open Access)
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Single Cell Transcriptomics and Spatial Localization in Mouse Neurons
… their primary functions are similar, neurons are spatially and functionally specialized across a wide array of neuronal subtypes. Characterizing the molecular contents and its variations within and across various neuronal subtypes can not only elucidate how these cell types interact with one …
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Visualizing the Spatial Localization of Active Matrix Metalloproteinases (MMPs) using MALDI Imaging MS
… (MMPs). The nature of the FBR requires the spatial and temporal regulation of these mediators. MMPs are an extremely large and diverse group of enzymes that play key roles in regulating the FBR. Precise spatiotemporal regulation of MMPs defines their proteolytic activities. The aim of this …
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Spatial localization of cartilage degradation using electromechanical surface spectroscopy with variable wavelength and frequency
Thesis (Ph. D.)--Massachusetts Institute of Technology, Whitaker College of Health Sciences and Technology, 1996.
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Untargeted metabolomics and proteomics application of mass spectrometry: from biomarker identification within cells to their spatial localization on tissues
… technologies it is now possible to identify and spatially localise the distribution of new reliable and specific biomarkers for each individual phenotype. In this thesis, molecular assays coupled to mass spectrometry-based global metabolomics and proteomics techniques were employed to examine the …
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Spatial Localization and Temporal Analysis of Optical Property Fluctuations by Multiplexed Near -Infrared Photon Density Waves in Turbid Media: In Vitro and in Vivo Studies
… I present a novel idea for improving spatial localization of macroscopic optical parameter fluctuations, and study the characteristics of this optical probe design using analytical solutions to the diffusion equation and Monte Carlo simulations that more appropriately represent the …
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Spatial localization and temporal analysis of optical property fluctuations by multiplexed near-infrared photon density waves in turbid media: In vitro and in vivo studies
… studied and developed methods to improve the spatial localization of these inhomogeneities in biological tissues, especially for the application of functional studies of the human brain in vivo. Recently much attention has been given to the study of the processes in the human brain that lead …
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Mechanical and psychophysical studies of surface wave propagation during vibrotactile stimulation
… especially for tactile displays used to convey spatial information. The objective of the present research was to determine how the surface waves induced by vibrotactile stimulation of the skin varied as a function of the site on the body where the motors were mounted, and how these waves …
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Data Assimilation and Applications in Forecasting
… Kalman filter (EnKF). The first explores how spatial localization, an important method commonly used in the EnKF, can be extended to multiscale problems. Rather than using a single length scale when localizing, we construct a localized covariance matrix through the estimation of eigenvectors. …
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Imaging and spectroscopy of tissue-like phantoms using photon density waves: Theory and experiments
… particular, the quantitative determination and spatial localization of the optical scattering and absorbing properties of biological tissue would allow for the non-invasive and non-ionizing imaging of tissue structure and the monitoring of physiology. Until recently, such characterization of …
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Spatiotemporal Chaos in Large Systems Driven Far-From-Equilibrium: Connecting Theory with Experiment
… shown that the dynamics are non-hyperbolic. The spatial distribution of the covariant Lyapunov vectors is different for the different Lyapunov vectors. Localization is used to quantify this variation. The spatial localization of the covariant Lyapunov vectors has a decreasing trend as the order …
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Optimal distributed control and estimation for systems with spatiotemporal dynamics
… this is often not the case in large-scale spatially distributed systems. In these, relying only on spatially localized information transfer might be preferred or even imperative for control and estimation. Motivated by this challenge, this dissertation analyzes optimal distributed control …
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Resolving optical illumination distributions along an axially symmetric photodetecting fiber
… which presents challenges to the extraction of spatially resolved information. In this thesis, we overcome this seemingly fundamental limitation and achieve the detection and spatial localization of a single incident optical beam at sub-centimeter resolution, along a one-meter fiber section. …
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Multivariate Correlations: Balance Operators and Variable Localization in Ensemble Data Assimilation
Localization is performed in ensemble data assimilation schemes to eliminate correlations that are contaminated by sampling error. This method is frequently necessary within numerical weather prediction (NWP) applications due to the computational constraints present, limiting the number of ensemble …
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Spatial sound and sound localization on a horizontal surface for use with interactive surface (tabletop) computers
… tabletop computers?" "How does our perception of spatial sound change with these different loudspeaker configurations?" and "What panning methods should be used to maximally use the spatial localization abilities of the user(s)?" Using a custom-built tabletop computer setup, the work presented in …
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EGF receptor-mediated fibroblast signaling and motility : role of nanoscale spatial ligand organization
… These changes in the magnitude, duration, and spatial localization of specific signals influence the biophysical regulation of cell migration, which is a multi-step process directed by a number of timely and spatially coordinated signaling events. In this work, we develop a polymer …
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Spatial mechanisms in the recovery of visual feature conjunctions
… but it appears possible that the common spatial location of features may provide a basis for a solution to the 'feature binding problem'. A number of writers have postulated that spatial localization provides a mechanism for recombining features by offering a means of cross-referencing …
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Quantitative analysis and modulation of the spatial operation of the EGF receptor autocrine cell signaling system
The spatial localization of EGFR autocrine systems is a critical factor for tissue development and homeostasis. It is difficult to analyze these systems, however, because they are both self-contained and recursive. To understand how cellular parameters influence autocrine activity, we investigated …
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Interface natural em 3D para animações interativas
… Our approach is based on the technique of spatial keyframing, that associates a marker in space for each key pose of a movement or action and allows the user to provide animations by moving the control cursor in the 3D space with a 2D mouse. In our system, interaction with the virtual …
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