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 660 for “"spike"”.
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Hollywood and History : Spike Lee's "Malcolm X"
… events and figures. This master's thesis uses Spike Lee's "Malcolm X" as a case study on historical filmmaking in Hollywood. This thesis focuses on Lee's recreation of the life of Malcolm X in relationship to historical accuracy in a big budget Hollywood film. In order to assess Lee's film …
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On neural spike sorting with mixture models
… problem we are trying to solve is called neural spike sorting in literature. There are three basic objectives of spike sorting. The first is to estimate the number of neurons which contribute to the recorded neural data. The second is to identify the spikes, i.e. the little curves in the recorded …
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Spike Processing Circuit Design for Neuromorphic Computing
… and energy-efficient computing platforms. Spike based-neuromorphic computing systems require high performance and low power neural encoder and decoder to emulate the spiking behavior of neurons. These two spike-analog signals converting interface determine the whole spiking neuromorphic …
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Embedding of synchronous spike activity in cortical networks
… in brain activity exhibits precisely timed spikes to be part of an important information concept, justifying a closer inspection of the underlying network mechanisms. As one such model, synfire chains are special feed-forward subnetworks that allow for stable modes of propagation of …
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Network Structures Arising from Spike-Timing Dependent Plasticity
Spike-timing dependent plasticity (STDP), a widespread synaptic modification mechanism, is sensitive to correlations between presynaptic spike trains, and organizes neural circuits in functionally useful ways. n this dissertation, I study the structures arising from STDP in a population of synapses …
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Displacement Spike Crystallization of Amorphous Germanium During Irradiation
Made available in DSpace on 2014-12-10T17:57:39Z (GMT). No. of bitstreams: 1 6408424.pdf: 1151084 bytes, checksum: eec3b7aba8278ee6ce8bea18c7f13e9f (MD5) Previous issue date: 1964
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Growing synfire chains with triphasic spike-time-dependent plasticity
… is guided by an experimentally reported spike-timing-dependent plasticity (STDP) rule, triphasic STDP, plus activity-dependent excitability. This STDP rule, which has not been previously used in computational studies, is shown to successfully develop a synfire chain in a network of binary …
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Efficient Sparse Bayesian Learning using Spike-and-Slab Priors
In the context of statistical machine learning, sparse learning is a procedure that seeks a reconciliation between two competing aspects of a statistical model: good predictive power and interpretability. In a Bayesian setting, sparse learning methods invoke sparsity inducing priors to explicitly …
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Genetics and functions of the SARS coronavirus spike protein
… acute respiratory syndrome (SARS). The SARS-CoV spike (S) glycoprotein mediates membrane fusion events during virus entry and virus-induced cell-to-cell fusion. Investigations, described herein, have focused on the genetic manipulation of the SARS-CoV S glycoprotein in order to delineate …
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Relationship between Surface and Indwelling EMG Spike Shape Measures
… it inappropriate for monitoring human movement. Spike shape analysis of the surface electromyographic signal responds to the call for non-invasive EMG measures for monitoring human movement and detecting neuromuscular disorders. The present study analyzed the relationship between surface and …
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Effects of isometric elbow flexion on electromyographic spike analysis
… between surface electromyographic (SEMG) spike activity and force. The secondary objective was to determine to what extent subcutaneous tissue impacts the high frequency component of the signal, as well as, examining the relationship between measures of SEMG spike shape and their …
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A Neural Signal Processor for Low-Latency Spike Inference
… in multi-electrode recordings, at single-spike resolution with low-latency. The system has two parts. The first is a Field-Programmable Gate Array (FPGA)-based Neural Signal Processor (NSP) that receives raw input and generates labelled spikes as output, a process referred to as real-time …
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Methods for Ripple Detection and Spike Sorting During Hippocampal Replay
… This necessitates online algorithms for both spike sorting and ripple detection at low latencies. In my work, I have developed and tested an improved method for ripple detection and tested its performance against previous methods. Further, I have optimized a recently proposed spike sorting …
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Spike-wave discharges in rats: mechanisms for generation and modulation
Contains fulltext : mmubn000001_137134800.pdf (Publisher’s version ) (Open Access)
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Manipulations of spike trains and their impact on synchrony analysis
… from the noisy recordings (referred to as spike sorting) and assessing the significance of the synchrony. This dissertation addresses these issues with two complementary strategies, both founded on the manipulation of point processes under rigorous analytical control. On the one hand I …
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The recent spike in illicit tobacco trade in South Africa
… The declines have been attributed to upward spikes in the illicit tobacco trade. This dissertation explores the upward spike in the illicit tobacco trade, in order to assess whether or not a relationship exists between tobacco companies’ actions and the spike in illicit activity. The study …
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Spike-based learning rules and stabilization of persistent neural activity
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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Finding patterns in timed data with spike timing dependent plasticity
My research focuses on finding patterns in events - in sequences of data that happen over time. It takes inspiration from a neuroscience phenomena believed to be deeply involved in learning. I propose a machine learning algorithm that finds patterns in timed data and is highly robust to noise and …
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