Results 71 to 80 of about 42,427 (189)

Modulating excitation/inhibition balance through transcranial electrical stimulation: physiological mechanisms in animal models

Frontiers in Neuroscience
The balance between excitatory and inhibitory (E/I) activity is a fundamental property of neural circuits, ensuring precise information processing and preventing pathological states such as hyperexcitability or network silencing.
Marta Estévez-Rodríguez, Guillermo Sánchez-Garrido Campos, Ángela M. Zafra, Isabel Cordones, Javier Márquez-Ruiz   +4 more
doaj   +1 more source

Transcranial Alternating Current Stimulation (tACS) Entrains Alpha Oscillations by Preferential Phase Synchronization of Fast-Spiking Cortical Neurons to Stimulation Waveform [PDF]

, 2019
Summary Modeling studies predict that transcranial alternating current stimulation (tACS) entrains brain oscillations, yet direct examination has been lacking or potentially contaminated by stimulation artefact. Here we first demonstrate how the posterior parietal cortex drives primary visual cortex and thalamic LP in
Negahbani, Ehsan, Stitt, Iain M., Davey, Marshall, Doan, Thien T., Dannhauer, Moritz, Hoover, Anna C., Peterchev, Angel V., Radtke-Schuller, Susanne, Fröhlich, Flavio   +8 more
openaire   +1 more source

A Modified Perturb-and-Observe Control for Improved Maximum Power Point Tracking Performance on Grid-Connected Photovoltaic System

International Journal of Technology
This paper deals with the control of maximum power production in a grid-connected photovoltaic system. The on-grid system ensures the continuity of electricity supply to consumers.
Rini Nur Hasanah, Frediawan Yuniar, Onny Setyawati, Hadi Suyono, Dian Retno Sawitri, Taufik Taufik   +5 more
doaj   +1 more source

Cortico-muscular coupling and motor performance are modulated by 20 Hz transcranial alternating current stimulation (tACS) in Parkinson’s disease

Frontiers in Human Neuroscience, 2014
Parkinson’s disease (PD) is associated with pathologically altered oscillatory activity. While synchronized oscillations between 13 and 30 Hz are increased within a cortico-subcortical network, cortico-muscular coupling is decreased.
Vanessa eKrause, Claudia eWach, Claudia eWach, Martin eSuedmeyer, Stefano eFerrea, Alfons eSchnitzler, Alfons eSchnitzler, Bettina ePollok   +7 more
doaj   +1 more source

Examination of load effects of an alternating current synchronous hydraulic drive

Multidiszciplináris Tudományok
Alternating current hydraulic systems can be divided into two large groups based on the electrical analogy: synchronous alternating current hydraulic drives and asynchronous alternating current hydraulic drives. The three main building units of alternating current systems are a hydromotor, a hydrogenerator and a phase space connecting the two main ...
openaire   +2 more sources

Coupling an induction motor type generator to ac power lines [PDF]

, 1984
A system for coupling an induction motor type generator to an A.C. power line includes an electronic switch means that is controlled by a control system and is regulated to turn on at a relatively late point in each half cycle of its operation.
Nola, F. J.
core   +1 more source

Deciphering the Synchronization of Alternating Current Frequency with the Nickel Catalytic Cycle in Selective C–N Cross-Coupling

Journal of the American Chemical Society
Alternating current (AC) electrolysis offers a promising strategy for modulating redox states in metal-catalyzed reactions, yet its mechanistic basis remains poorly understood. Here, we uncover how AC frequency synchronizes with key steps in a Ni-catalyzed cross-coupling cycle to control product selectivity between C-N and C-C coupling.
Atanu Hazra, Marisa Organiscak, Long Luo
openaire   +2 more sources

Spin torque building blocks

, 2013
The discovery of the spin torque effect has made magnetic nanodevices realistic candidates for active elements of memory devices and applications. Magnetoresistive effects allow the read-out of increasingly small magnetic bits, and the spin torque ...
Cros, Vincent, Grollier, Julie, Locatelli, Nicolas   +2 more
core   +1 more source

Emergence of Synchronous Oscillations in Neural Networks Excited by Noise

, 2005
The presence of noise in non linear dynamical systems can play a constructive role, increasing the degree of order and coherence or evoking improvements in the performance of the system. An example of this positive influence in a biological system is the
FitzHugh, Gammaitoni, Gluckman, Hidaka, Hodgkin, Kopell, L Vázquez, M.P Zorzano, Nagumo, Nozaki, Richardson, Rudolph, Sabatini, Simonotto, von Stein, White, White, Zorzano   +17 more
core   +1 more source

Discussion on “voltage ratio in synchronous converters, with special reference to the split-pole converter” and on “application of storage-batteries to regulation of alternating-current systems.” Atlantic City, N. J., July 1, 1908 [PDF]

Proceedings of the American Institute of Electrical Engineers, 1909
n ...
openaire   +3 more sources