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Now showing items 181-190 of 266
Parallelizing the Kolmogorov-Fokker-Planck Equation
(2015-12-31)
We design two parallel schemes, based on Schwarz Waveform Relaxation (SWR) procedures, for the numerical solution of the Kolmogorov equation. The latter is a simplified version of the Fokker-Planck equation describing the ...
Non-Markovian models of the growth of a polymer chain
Sokolovski, D.; Rusconi, S.
; Akhmatskaya, E.; Asua, J.M. (2015-12-31)
; Akhmatskaya, E.; Asua, J.M. (2015-12-31)
Using simple exactly solvable models, we show that event-dependent time delays may lead to significant non-Poisson effects in the statistics of polymer chain growth. The results are confirmed by stochastic simulation of ...
A differential equation with state-dependent delay from cell population biology
(2015-12-31)
We analyze a differential equation, describing the maturation of a stem cell population, with a state-dependent delay, which is implicitly defined via the solution of an ODE. We elaborate smoothness conditions for the model ...
Geometry shapes propagation: Assessing the presence and absence of cortical symmetries through a computational model of cortical spreading depression
Kroos, J.M.; Diez, I.; Cortes, J.M.; Stramaglia, S.; Gerardo-Giorda, L. (2015-12-31)
; Gerardo-Giorda, L. (2015-12-31)
Cortical spreading depression (CSD), a depolarization wave which originates in the visual cortex and travels toward the frontal lobe, has been suggested to be one neural correlate of aura migraine. To the date, little is ...
Lagged and instantaneous dynamical influences related to brain structural connectivity
Alonso, C.; Diez, I.; Remaki, L.; Escudero, I.; Mateos, B.; Rosseel, Y.; Marinazzo, D.; Stramaglia, S.; Cortes, J.M. (2015-12-31)
; Cortes, J.M. (2015-12-31)
Contemporary neuroimaging methods can shed light on the basis of human neural and cognitive specializations, with important implications for neuroscience and medicine. Indeed, different MRI acquisitions provide different ...
Relative frequencies of constrained events in stochastic processes: An analytical approach
Rusconi, S.; Akhmatskaya, E.; Sokolovski, D.; Ballard, N.; de La Cal, J.C. (2015-12-31)
; Akhmatskaya, E.; Sokolovski, D.; Ballard, N.; de La Cal, J.C. (2015-12-31)
The stochastic simulation algorithm (SSA) and the corresponding Monte Carlo (MC) method are among the most common approaches for studying stochastic processes. They relies on knowledge of interevent probability density ...
Large-scale simulations of synthetic markets
Gerardo-Giorda, L.; Germano, G.; Scalas, E. (2015-10-08)
(2015-10-08)
High-frequency trading has been experiencing an increase of interest both for practical purposes within nancial institutions and within academic research; recently, the UK Government O ce for Science reviewed the state ...
Multiple-time-stepping generalized hybrid Monte Carlo methods
Escribano, B.; Akhmatskaya, E.; Reich, S.; Azpiroz, J.M. (2014-12-31)
; Reich, S.; Azpiroz, J.M. (2014-12-31)
Performance of the generalized shadow hybrid Monte Carlo (GSHMC) method [1], which proved to be superior in sampling efficiency over its predecessors [2-4], molecular dynamics and hybrid Monte Carlo, can be further improved ...
Constant pressure hybrid Monte Carlo simulations in GROMACS
Fernández-Pendás, M.; Escribano, B.; Radivojevic, T.; Akhmatskaya, E. (2014-12-31)
(2014-12-31)
Adaptation and implementation of the Generalized Shadow Hybrid Monte Carlo (GSHMC) method for molecular simulation at constant pressure in the NPT ensemble are discussed. The resulting method, termed NPT-GSHMC, combines ...
Stability analysis of a renewal equation for cell population dynamics with quiescence
(2014-12-31)
We propose a model to analyze the dynamics of interacting proliferating and quiescent cell populations. The model includes age dependence of cell division, transitions between the two subpopulations, and regulation of the ...