Results 111 to 120 of about 90,554 (217)

Inroads into epilepsy through high‐frequency oscillations: Achievements and benchmark areas for improvement

Epilepsia, EarlyView.
Abstract High‐frequency oscillations (HFOs) were discovered more than 20 years ago, and since then they have been studied intensively in the context of epilepsy. HFOs encompass a broad spectrum of oscillations, typically ranging from 80 Hz to several kHz, that include both normal and pathological oscillations, documented in people with epilepsy and ...
Christos Panagiotis Lisgaras, Birgit Frauscher, Jean Gotman, Julia Jacobs, Philippe Kahane, Richard J. Staba, Maeike Zijlmans   +6 more
wiley   +1 more source

Microfabricated Optically-Pumped Magnetometers for Biomagnetic Applications

Journal of Physics: Conference Series, 2016
We report on the progress in developing microfabricated optically-pumped magnetometer arrays for imaging applications. We have improved our sensitivities by several orders of magnitude in the last ten years. Now, our zero-field magnetometers reach noise values below 15 fT/Hz1/2.
Svenja Knappe, Orang Alem, Dong Sheng, John Kitching   +3 more
openaire   +1 more source

Are we in the science fiction era of brain imaging? A point of view on advances and challenges in brain investigation

Aperture Neuro
In recent years, new technologies have been developed to study epilepsy, in particular optically pumped magnetometers. In this editorial, I review some recent work on on-scalp magnetoencephalography in epilepsy and ponder the question: is it science ...
Odile Feys
doaj   +1 more source

Faraday–Ramsey Rotation in Ultrathin Alkali Vapor Cells as an Analogy to Atomic‐Beam Systems

Laser &Photonics Reviews, EarlyView.
This work demonstrates that ultrathin rubidium vapor cells can emulate atomic‐beam behavior through geometry‐dependent velocity filtering. Employing a spatially separated pump–probe scheme and Faraday–Ramsey rotation, the study reveals coherent atomic dynamics without buffer gas or anti‐relaxation coatings. This approach offers a compact pathway toward
Mark Dikopoltsev, Eliran Talker, Yefim Barash, Noa Mazurski, Uriel Levy   +4 more
wiley   +1 more source

Optically-Pumped Magnetometers for the Energy Sector: Challenges & Prospects

e-Journal of Nondestructive Testing

Sebastien Boisseau, Thomas Jager, Aurore Lepecq, Thomas Maurin, David Fraboulet, Jean-Michel Leger   +5 more
doaj   +1 more source

Technologies for equine welfare and performance monitoring under field conditions – Where do we stand?

Equine Veterinary Journal, EarlyView.
Abstract The need for comprehensive equine welfare assessments has become particularly evident amid ongoing debates about the social licence to operate in equestrian sports. During exercise, multiple physiological systems, principally the cardiovascular, respiratory, muscular, thermoregulatory, endocrine, and locomotory systems, undergo complex ...
Rhana Mackie Aarts, Esther W. Siegers, Filipe M. Serra Braganca, P. René van Weeren   +3 more
wiley   +1 more source

Optically pumped alkali magnetometers for biomedical applications [PDF]

Europhysics News, 2012
20 Optically pumped atomic magnetometers measure the Larmor frequency νL at which the bulk magnetization of a spin-polarized alkali metal vapour in a glass cell precesses around the field of interest B → 0. The precession frequency is related to the modulus of the magnetic field by νL=(γ/2π)|B → 0|, where γ/2π≈3.5Hz/nT for 133Cs, so that the magnetic ...
openaire   +1 more source

A project for a new alkali vapour magnetometer, optically pumped by a diode laser

Annals of Geophysics, 1998
We present here a project for the industrial development of a new magnetometer that is intended to achieve the highest performance in measuring geomagnetic field.
A. Donati, E. Simeone, M. Francesconi, E. Maccioni, E. Alzetta, C. Carmisciano, O. Faggioni, N. Beverini, F. Strumia   +8 more
doaj   +1 more source

Development of a ³He magnetometer for a neutron electric dipole moment experiment [PDF]

, 2014
We have developed a highly sensitive 3He magnetometer for the accurate measurement of the magnetic field in an experiment searching for an electric dipole moment of the neutron.
Daum, Manfred, Heil, Werner, Koch, Hans-Christian, Kraft, Andreas, Lauer, Thorsten, Neumann, Daniel, Pazgalev, Anatoly, Sobolev, Yuri, Weis, Antoine   +8 more
core  

Cancellation of nonlinear Zeeman shifts with light shifts

, 2009
Nonlinear Zeeman (NLZ) shifts arising from magnetic-field mixing of the two hyperfine ground-states in alkali atoms lead to splitting of magnetic-resonance lines.
Acosta, V. M., Budker, D., Higbie, J. M., Jensen, K., Ledbetter, M. P., Rochester, S. M.   +5 more
core   +1 more source