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 78 for “"network activity"”.
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Subcortical Inputs Governing Cortical Network Activity
… adjusted by internally generated background activity, which varies by arousal state and behavioral context. Therefore, to understand how excitation propagates through the cortex, it is necessary to characterize the laminar flow of signal propagation as well as spontaneous network activity, …
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Network activity arising from optimal diameters of neuronal processes
… and their role in the synchronization of neural networks and the generation of oscillations has been studied theoretically. Recently, it has been found that the amplitude of the postsynaptic potential is maximized for a specific diameter of the postsynaptic fiber. In this thesis, the impact of …
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Using machine learning for analysis of neuronal network activity
Analyzing neuronal activity in developing neuronal networks can improve our understanding of neuronal dysfunctions underlying conditions such as Rett syndrome. Two-photon calcium imaging is used to capture neuronal network activity over time. This method produces large sets of images that are …
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Rapid neuronal responses during spreading neurotoxic and neuroprotective network activity
… of dendritic beads and the inhibition of network activity also occurs at subtoxic concentrations of glutamate and neuronal morphological changes recover rapidly post-insult. We therefore hypothesised that beading and the inhibition of neurotransmitter release may be a protective mechanism …
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Real-time detection of malicious network activity using stochastic models
… develops approaches to rapidly detect malicious network traffic including packets sent by portscanners and network worms. The main hypothesis is that stochastic models capturing a host's particular connection-level behavior provide a good foundation for identifying malicious network activity in …
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Detecting Irregular Network Activity with Adversarial Learning and Expert Feedback
… disciplines. With the vital role communication networks play in our daily lives, the security of these networks is imperative for smooth functioning of society. This thesis proposes a novel self-supervised deep learning framework CAAD for anomaly detection in wireless communication systems. …
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Fingerprinting the Smart Home: Detection of Smart Assistants Based on Network Activity
… to fingerprinting IoT devices behind private networks while only examining last-mile internet traffic . Not only does this attack only rely on traffic that would be available to an ISP, it does not require changes to existing infrastructure. Further, it does not rely on packet contents, and …
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Two-photon calcium imaging sequence Analysis Pipeline : a method for analyzing neuronal network activity
Investigating the development of neuronal networks can help us to identify new therapies and treatments for conditions that affect the brain, such as autism and Alzheimer's disease. Two-photon calcium imaging has been a powerful tool for the investigation of the development of neuronal networks. …
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Investigating Spatial Memory Reconsolidation in Rats: Memory Updating, Effects of Aging, and Hippocampal Network Activity
… piloted an experiment to examine hippocampal network activity associated with the spatial memory reconsolidation task used in the first two studies. Preliminarily, we found that the context reminder manipulation was associated with more place field stability across some spatial tasks and that …
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Understanding experience-dependent plasticity of cellular and network activity in the mouse primary visual cortex
… Arc. Also, the juvenile OD shift requires the activity of N-methyl-D-aspartate (NMDA) receptors in layer 4 excitatory principal neurons in V1. Another simple but powerful phenomenon of an adult form of visual cortical plasticity is stimulus-selective response potentiation (SRP). SRP is induced …
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NEUROACTIVE AGENTS-MEDIATED CHANGES IN NEURONAL NETWORK ACTIVITY CONTROLS SUSCEPTIBILITY TO SUDDEN UNEXPECTED DEATH IN EPILEPSY (SUDEP)
… in DBA/1 mouse model of SUDEP, but the neuronal networks mediating S-IRA and the brain structures involved in the fluoxetine-mediated blockade of S-IRA are not known. Data from human SUDEP imaging has underlined the role of periaqueductal gray (PAG), which is also implicated in audiogenic seizure …
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Dynamics of dopamine signaling and network activity in the striatum during learning and motivated pursuit of goals
… and electrochemical techniques to measure neural activity and dopamine release in networks of the striatum, the principle input nucleus of the basal ganglia as rats learned to pursue rewards in mazes. The electrophysiological recordings revealed training dependent dynamics in striatum local field …
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CREATING COMPREHENSIVE WRAP-AROUND SERVICES FOR THE HOMELESS COMMUNITY: EXPLORING NETWORK ACTIVITY AMONG SHELTERS AND SERVICE ORGANIZATIONS WITHIN THE SOUTH-SIDE OF CHICAGO
… and sustainability. The plan is a network of organizations forming support systems that include housing, community organizations, hospitals, and other organizations serving homeless clients using collaborative efforts. To understand their relationships and how they support the …
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Scaling of unitary synaptic strength in the context of network dynamics
… consideration in understanding neuronal networks is determining what sets the unitary functional strength of a synaptic connection between two cells, and what meta-processes such mechanisms answer to. This question can be asked either mechanistically, by characterizing the molecular …
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Characterizing university network usage with Active Directory event logs
In this thesis, we investigate a university network that uses Active Directory as its authentication system. We get an understanding of the network by analyzing Windows event logs generated at Active Directory domain controllers. We want to see what network activity looks like as a first step in …
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Evaluation of Zinc Toxicity Using Neuronal Networks on Microelectrode Arrays: Response Quantification and Entry Pathway Analysis
Murine neuronal networks, derived from embryonic frontal cortex (FC) tissue grown on microelectrode arrays, were used to investigate zinc toxicity at concentrations ranging from 20 to 2000 mM total zinc acetate added to the culture medium. Continual multi-channel recording of spontaneous action …
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Statistical analysis of neuronal data: Development of quantitative frameworks and application to microelectrode array analysis and cell type classification
… methods for analysing spontaneous neuronal network activity recorded on microelectrode arrays (MEAs). I perform an unbiased evaluation of the existing techniques for detecting ‘bursts’ of neuronal activity in these types of recordings, and provide recommendations for the robust analysis of …
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Impact of Second Messenger Modulation on Activity-Dependent and Basal Properties of Excitatory Synapses
… is the fundamental mechanism underlying network information flow. Because network information is coded by the timing and the strength of neuronal activity, synaptic properties that translate neuronal activity into synaptic output profoundly determine the precision of information transfer. …
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Unique applications of cultured neuronal networks in pharmacology, toxicology, and basic neuroscience
… research explored the capabilities of neuronal networks grown on substrate integrated microelectrode arrays in vitro with emphasis on utilizing such preparations in three specific application domains: pharmacology and drug development, biosensors and neurotoxicology, and the study of burst and …
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