We present a general, trainable oscillatory neural network as a large-scale model of brain dynamics. The model has a cascade of two stages - an oscillatory stage and a complex-valued feedforward stage - for modelling the relationship between structural connectivity and functional connectivity from neuroimaging data under resting brain conditions. Earlier works of large-scale brain dynamics that used Hopf oscillators used linear coupling of oscillators.
View Article and Find Full Text PDFIEEE Trans Neural Netw Learn Syst
June 2024
The recent surge of interest in brain-inspired architectures along with the development of nonlinear dynamical electronic devices and circuits has enabled energy-efficient hardware realizations of several important neurobiological systems and features. Central pattern generator (CPG) is one such neural system underlying the control of various rhythmic motor behaviors in animals. A CPG can produce spontaneous coordinated rhythmic output signals without any feedback mechanism, ideally realizable by a system of coupled oscillators.
View Article and Find Full Text PDFNon-linear processes such as four-wave-mixing have become instrumental in attosecond EUV spectroscopy. Using EUV high harmonics in conjunction with collinear near-infrared and mid-infrared fields, we extended this approach to high-order-mixing between three colors. Specifically, we find that atomic resonances in neon exhibit a significant cross section for six-wave mixing.
View Article and Find Full Text PDFFront Comput Neurosci
August 2022
We present a model of a tonotopic map known as the Oscillatory Tonotopic Self-Organizing Map (OTSOM). It is a 2-dimensional, self-organizing array of Hopf oscillators, capable of performing a Fourier-like decomposition of the input signal. While the rows in the map encode the input phase, the columns encode frequency.
View Article and Find Full Text PDFRecurrent neural networks with associative memory properties are typically based on fixed-point dynamics, which is fundamentally distinct from the oscillatory dynamics of the brain. There have been proposals for oscillatory associative memories, but here too, in the majority of cases, only binary patterns are stored as oscillatory states in the network. Oscillatory neural network models typically operate at a single/common frequency.
View Article and Find Full Text PDFA mixed methods study was conducted to better understand food access, food retail store environment, and perspectives of community residents on their grocery store shopping patterns and access to healthy foods in underserved, predominantly African American neighborhoods. GIS mapping, grocery store observations (n = 4), a food access and grocery store environment survey (n = 126), and focus groups (n = 48) were used. The results indicate that these neighborhoods have a low density of grocery stores, and only two out of four grocery stores meet the standard for a healthy retail store.
View Article and Find Full Text PDFIndian J Otolaryngol Head Neck Surg
November 2019
To determine whether separate administration of Montelukast and Levocetirizine provide a better response in perennial allergic rhinitis (PAR) than their fixed dose combination. Total 151 patients underwent a hospital based clinical study, being divided in 3 discrete groups. One group was given non-bilayered combination of Montelukast and Levocetrizine, 2nd group was given their bilayered counterpart whereas 3rd group was given the drugs at 12 h interval.
View Article and Find Full Text PDFJ Exp Psychol Appl
December 2019
This research examines the impact of ambient odor on food consumption. The results of a field experiment and 5 lab experiments show that the presence of a warm ambient odor (e.g.
View Article and Find Full Text PDF