Results 51 to 60 of about 1,124,085 (247)

Simultaneous detection of quantum oscillations from bulk and topological surface states in metallic Bi2Se2.1Te0.9

open access: yes, 2017
Shubnikov-de Haas (SdH) oscillations in metallic Bi2Se2.1Te0.9 are studied in magnetic fields up to 35 Tesla. It is demonstrated that two characteristic frequencies determine the quantum oscillations of the conductivity.
Chu, Paul C. W.   +4 more
core   +1 more source

Experimental Estimation of Kinematic Viscosity of Low-Density Air Using Optically Derived Macroscopic Transient Flow Parameters

open access: yesSensors
This article presents a novel experimental method of calculation of kinematic viscosity parameter for rarefied/low-density air using the analysis of optically recorded oscillations of the stratospheric balloon mission parachute’s canopy.
Tomasz Aleksander Miś
doaj   +1 more source

Spatiotemporal dynamics of word processing in the human brain

open access: yesFrontiers in Neuroscience, 2007
We examined the spatiotemporal dynamics of word processing by recording the electrocorticogram (ECoG) from the lateral frontotemporal cortex of neurosurgical patients chronically implanted with subdural electrode grids.
Ryan T Canolty   +15 more
doaj   +1 more source

Shape oscillations of human neutrophil leukocytes: characterization and relationship to cell motility [PDF]

open access: yes, 1996
When neutrophil leukocytes are stimulated by chemotactic factors or by substratum contact, they change their shape. Shape changes are a prerequisite for cellular migration and typically involve the extrusion of thin, veil-like lamellipods and the ...
Coates, Thomas D.   +2 more
core  

Solar Oscillations and Convection: II. Excitation of Radial Oscillations

open access: yes, 2000
Solar p-mode oscillations are excited by the work of stochastic, non-adiabatic, pressure fluctuations on the compressive modes. We evaluate the expression for the radial mode excitation rate derived by Nordlund and Stein (Paper I) using numerical ...
A. Nordlund   +11 more
core   +1 more source

Hippocampal phase precession may be generated by chimera dynamics

open access: yesFrontiers in Neural Circuits
The 8 Hz theta rhythm observed in hippocampal local field potentials of animals can be regarded as a “clock” that regulates the timing of spikes. While different interneuron sub-types synchronously phase lock to different phases for every theta cycle ...
Maria Masoliver   +7 more
doaj   +1 more source

Bloch oscillations in Fermi gases

open access: yes, 2003
The possibility of Bloch oscillations for a degenerate and superfluid Fermi gas of atoms in an optical lattice is considered. For a one-component degenerate gas the oscillations are suppressed for high temperatures and band fillings.
A. J. Leggett   +8 more
core   +1 more source

Oscillatory character of changes in ultraweak luminescence from Nitella cells

open access: yesActa Societatis Botanicorum Poloniae, 2014
Characteristics of changes in ultraweak luminescence of Nitella internodal cells under physiological conditions and after exposure to the action of biologically active substances are determined.
Anna Jaśkowska   +3 more
doaj   +1 more source

Synaptic Plasticity and Oscillations in Alzheimer’s Disease: A Complex Picture of a Multifaceted Disease

open access: yesFrontiers in Molecular Neuroscience, 2021
Brain plasticity is widely accepted as the core neurophysiological basis of memory and is generally defined by activity-dependent changes in synaptic efficacy, such as long-term potentiation (LTP) and long-term depression (LTD).
Yuniesky Andrade-Talavera   +1 more
doaj   +1 more source

Network deficiency exacerbates impairment in a mouse model of retinal degeneration

open access: yesFrontiers in Systems Neuroscience, 2012
Neural oscillations play an important role in normal brain activity, but also manifest during Parkinson’s disease, epilepsy, and other pathological conditions. The contribution of these aberrant oscillations to the function of the surviving brain remains
Christopher Wai-Man Yee   +2 more
doaj   +1 more source

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