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 32 for “"Connectivity analysis"”.
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Exploring Connectivity Patterns in Pediatric Encephalitis: An EEG-Based Connectivity Analysis
L'abstract è presente nell'allegato / the abstract is in the attachment
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Deep Learning for Brain Structural Connectivity Analysis: From Tissue Segmentation to Tractogram Alignment
… MRI (dMRI) for the computation of the structural connectivity of the brain. In particular, from the processing of dMRI data, it is possible to investigate the structures of WM through tractography techniques, obtaining a virtual representation of the WM pathways called tractogram. Since the …
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Connectivity analysis of brain function in children with foetal alcohol spectrum disorder and control children during number processing
… the groups of children differ in functional connectivity during the number processing tasks. Therefore, the objective of this study was to analyse connectivity between functionally specialised brain areas in the previously collected fMRI data. The fMRI data of 14 controls and 7 …
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On the Use of Independent Component Analysis & Functional Network Connectivity Analysis: Evaluation on Two Distinct Large-Scale Psychopathology Studies
Medical image analysis techniques are becoming ever useful in allowing us to better understand the complexities and constructs of the brain and its functions. These analysis methods have proven to be integral in revealing trends in brain activity within individuals with mental disorders that are …
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FMRI guided DTI at the grey-white matter interface : with application to a connectivity analysis of the default mode network in Urbach-Wiethe disease
The cerebral cortex is composed of a thin layer of Grey Matter (GM), functionally subdivided into discrete regions which are connected in a large scale network via White Matter (WM) tracts. With fMRI (Functional Magnetic Resonance Imaging) it is possible to identify cortical regions involved in …
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Modelling Effective Connectivity in Functional Magnetic Resonance Imaging Data by State Space Models
… approach using state space models for effective connectivity analysis. The proposed approach integrates both activation and connectivity analysis into one single model. It takes the temporal information in the fMRI data into consideration explicitly and can be used to model the relationship among …
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Time-resolved Resting-state fMRI of Brain States Associated with Drug-resistant Epilepsy
… a novel analytical framework for time-resolved analysis of resting-state functional magnetic resonance imaging (fMRI) data with the aim of elucidating brain patterns of aberrant activity in individuals with drug-resistant epilepsy. Specifically, a dynamic functional connectivity analysis method …
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A functional imaging study of the relationship between the Default Mode Network and other control networks in the human brain
… cognitive control networks through functional connectivity analysis and analysis of combined electroencephalographic (EEG) recordings. Data utilised across a series of three experiments were obtained from combined EEG-functional Magnetic Resonance Imaging recordings acquired during technical …
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Computer-aided recognition of man-made structures in aerial photographs
… of buildings in aerial photos is explored. Connectivity analysis is performed on graphs derived from line segment representations of the original images, obtained with the use of the Radon Transform. The model is experimentally validated using 2-meter panchromatic aerial photographs from the …
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Neural Correlates of Repetition Priming: Changes in fMRI Activation and Synchrony
… neural synchrony, as measured by functional connectivity analysis using functional MRI, between category-preferential regions in VOTC and broader category-related networks would underlie behavioural priming. To test this hypothesis, I localized several category-preferential regions in VOTC …
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Mapping Connectivity: Integrating Ecological Landscape Analysis into Urban Planning in the City of Nanaimo
… are critical for maintaining biodiversity, yet connectivity planning must balance ecological sustainability with urban growth and socio-economic considerations. This study had two main objectives: (1) identify from the literature which landscape, ecological, land use, and infrastructure …
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Neural Mechanisms Mediating the Effects of Food Cues and Acute Exercise: a functional Magnetic Resonance Imaging and Functional Connectivity Investigation
… area. Moreover, we conducted functional connectivity analysis to examine other areas of the brain that were positively or negatively correlated with these two areas when viewing high calorie food cues following exercise. The functional network identified was broadly distributed and …
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The Neural Development of Visuohaptic Object Processing
… interaction (gPPI) methods of functional connectivity analysis in children (4 to 5.5 years, 7 to 8.5 years) and adults, I examine the developmental changes of the brain regions underlying the convergence of visual and haptic object perception, the neural substrates supporting crossmodal …
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Tidally Induced Transport Dynamics in a Wadden Sea Tidal Basin and Its Changes Under Future Sea Level Rise Scenarios
… 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 conditions remains uncertain. This …
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Generative models of brain connectivity for population studies
Connectivity analysis focuses on the interaction between brain regions. Such relationships inform us about patterns of neural communication and may enhance our understanding of neurological disorders. This thesis proposes a generative framework that uses anatomical and functional connectivity …
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Game theoretic approach in routing protocols for wireless mobile ad hoc networks
… AODV in our NS-2 simulations. A thorough connectivity analysis was also performed for FDG and FGRP to ensure that these protocols do not introduce disconnectivity. Surprisingly, both FDG and FGRP showed better connectivity compared to AODV in moderate to high node density networks.
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Factors Affecting Resting-State Functional Connectivity Across Three Intrinsically Connected Networks in Traumatic Brain Injury
… the factors that influence post-TBI functional connectivity within three intrinsically connected networks; the default mode network (DMN), central executive network (CEN), and salience network (SN). The aim was to develop a predictive model for each network, based off a combination of cognitive …
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The application of machine vision to the selective harvest of green asparagus
… from the images. Run-length encoding and connectivity analysis was used to identify all horizontal runs of object pixels belonging to a single object region. The list of runs for a single region was used to calculate spatial parameters of the region. Asparagus spears were longer in pixel …
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Factors affecting golden-crowned sifaka (Propithecus tattersalli) densities and strategies for their conservation
… range-wide genetic diversity and conducted a connectivity analysis to prioritize corridor-restoration and other potential conservation efforts. Sifaka densities varied widely across forest fragments (6.8 (SE = 2.0-22.8) to 78.1 (SE = 53.1-114.8) sifakas/km²) and populations have declined by as …
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A novel device for interrogation of neuron connectivity in acute brain slices
… processing and how changes to neuronal connectivity are associated with pathological states. Neuron interactions underlie functional roles of local brain networks, for instance memory and cognitive abilities, which are often detrimentally impacted in cognitive states. Therefore, …
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