Browsing by Subject "Nonlinear Dynamics"
Now showing items 1-19 of 19
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A cerebellar learning model of vestibulo-ocular reflex adaptation in wild-type and mutant mice.
(The Journal of neuroscience : the official journal of the Society for Neuroscience, 2014-05)Mechanisms of cerebellar motor learning are still poorly understood. The standard Marr-Albus-Ito theory posits that learning involves plasticity at the parallel fiber to Purkinje cell synapses under control of the climbing ... -
Chaos in percepts?
(Biol Cybern, 1994)Multistability in perceptual tasks has suggested that the mechanisms underlying our percepts might be modeled as nonlinear, deterministic systems that exhibit chaotic behavior. We present evidence supporting this view, obtaining ... -
Complex Behavior in the Dynamic Response of a Non-smoothly Forced Mechanical System: Numerical and Experimental Investigations
(2013)This thesis describes the theoretical and experimental investigations on a non-smooth impacting system consisting of a forced oscillating mass with an impacting barrier, which has the ability to impart energy into the vibrating ... -
Control of the orientational order and nonlinear optical response of the "push-pull" chromophore RuPZn via specific incorporation into densely packed monolayer ensembles of an amphiphilic four-helix bundle peptide: characterization of the peptide-chromophore complexes.
(J Am Chem Soc, 2010-08-18)"Push-pull" chromophores based on extended pi-electron systems have been designed to exhibit exceptionally large molecular hyperpolarizabilities. We have engineered an amphiphilic four-helix bundle peptide to vectorially ... -
Dual-energy computed tomography with advanced postimage acquisition data processing: improved determination of urinary stone composition.
(J Endourol, 2010-03)INTRODUCTION: The characterization of urinary calculi using noninvasive methods has the potential to affect clinical management. CT remains the gold standard for diagnosis of urinary calculi, but has not reliably differentiated ... -
Dynamics of the Disk-Pendulum Coupled System With Vertical Excitation
(2016)This paper investigates the static and dynamic characteristics of the semi-elliptical rocking disk on which a pendulum pinned. This coupled system’s response is also analyzed analytically and numerically when a vertical ... -
From spiking neuron models to linear-nonlinear models.
(PLoS Comput Biol, 2011-01-20)Neurons transform time-varying inputs into action potentials emitted stochastically at a time dependent rate. The mapping from current input to output firing rate is often represented with the help of phenomenological models ... -
Glutamate receptor dynamics in dendritic microdomains.
(Neuron, 2008-05)Among diverse factors regulating excitatory synaptic transmission, the abundance of postsynaptic glutamate receptors figures prominently in molecular memory and learning-related synaptic plasticity. To allow for both long-term ... -
Inference for nonlinear epidemiological models using genealogies and time series.
(PLoS Comput Biol, 2011-08)Phylodynamics - the field aiming to quantitatively integrate the ecological and evolutionary dynamics of rapidly evolving populations like those of RNA viruses - increasingly relies upon coalescent approaches to infer past ... -
Large Deflection Inextensible Beams and Plates and their Responses to Nonconservative Forces: Theory and Computations
(2020)There is a growing interest among aeroelasticity researchers for insight into large deflection oscillations of aerospace structures. Here, a new beam and plate model is derived using Hamilton's Principle to lay the structural ... -
Modeling endocrine control of the pituitary-ovarian axis: androgenic influence and chaotic dynamics.
(Bulletin of mathematical biology, 2014-01)Mathematical models of the hypothalamus-pituitary-ovarian axis in women were first developed by Schlosser and Selgrade in 1999, with subsequent models of Harris-Clark et al. (Bull. Math. Biol. 65(1):157-173, 2003) and Pasteur ... -
Monte Carlo methods for localization of cones given multielectrode retinal ganglion cell recordings.
(Network (Bristol, England), 2013-01)It has recently become possible to identify cone photoreceptors in primate retina from multi-electrode recordings of ganglion cell spiking driven by visual stimuli of sufficiently high spatial resolution. In this paper we ... -
Nonlinear Dynamics of Discrete and Continuous Mechanical Systems with Snap-through Instabilities
(2012)The primary focus of this dissertation is the characterization of snap-through buckling of discrete and continuous systems. Snap-through buckling occurs as the consequence of two factors, first the destabilization, or more ... -
Nonlinear Energy Harvesting With Tools From Machine Learning
(2020)Energy harvesting is a process where self-powered electronic devices scavenge ambient energy and convert it to electrical power. Traditional linear energy harvesters which operate based on linear resonance work well only ... -
Nonlinear oscillator metamaterial model: numerical and experimental verification.
(Opt Express, 2011-04-25)We verify numerically and experimentally the accuracy of an analytical model used to derive the effective nonlinear susceptibilities of a varactor-loaded split ring resonator (VLSRR) magnetic medium. For the numerical validation, ... -
On the distribution of firing rates in networks of cortical neurons.
(The Journal of neuroscience : the official journal of the Society for Neuroscience, 2011-11)The distribution of in vivo average firing rates within local cortical networks has been reported to be highly skewed and long tailed. The distribution of average single-cell inputs, conversely, is expected to be Gaussian ... -
Storing structured sparse memories in a multi-modular cortical network model.
(Journal of computational neuroscience, 2016-04)We study the memory performance of a class of modular attractor neural networks, where modules are potentially fully-connected networks connected to each other via diluted long-range connections. On this anatomical architecture ... -
Synaptic plasticity rules with physiological calcium levels.
(Proceedings of the National Academy of Sciences of the United States of America, 2020-12-16)Spike-timing-dependent plasticity (STDP) is considered as a primary mechanism underlying formation of new memories during learning. Despite the growing interest in activity-dependent plasticity, it is still unclear whether ... -
The synchronization of superparamagnetic beads driven by a micro-magnetic ratchet.
(Lab Chip, 2010-08-21)We present theoretical, numerical, and experimental analyses on the non-linear dynamic behavior of superparamagnetic beads exposed to a periodic array of micro-magnets and an external rotating field. The agreement between ...
