Results 91 to 100 of about 3,275 (185)

Avoiding non-linearity of optically pumped magnetometer MEG within an actively shielded two-layer mu-metal room

Current Directions in Biomedical Engineering, 2021
Some optically pumped magnetometer (OPM) sensors available for biomagnetic investigations have a linear range limited to +- 1 nT due to the specific properties of their open loop operation.
Sander Tilmann H., Marhl Urban, Jazbinšek Vojko   +2 more
doaj   +1 more source

Experimental study of 199Hg spin anti-relaxation coatings

, 2013
We report on a comparison of spin relaxation rates in a $^{199}$Hg magnetometer using different wall coatings. A compact mercury magnetometer was built for this purpose.
Chowdhuri, Z., Fertl, M., Horras, M., Kirch, K., Krempel, J., Lauss, B., Mtchedlishvili, A., Rebreyend, D., Roccia, S., Schmidt-Wellenburg, P., Zsigmond, G.   +10 more
core   +3 more sources

Disentangling Coincident Cell Events Using Deep Transfer Learning and Compressive Sensing

Advanced Intelligent Systems, EarlyView.
Overlapping cells during detection distort single‐cell measurements and reduce diagnostic accuracy. A hybrid framework combining a fully convolutional neural network with compressive sensing to disentangle overlapping signals directly from raw time‐series data is presented.
Moritz Leuthner, Rafael Vorländer, Oliver Hayden   +2 more
wiley   +1 more source

Refining Detection of Subclinical Epileptiform Activity in Alzheimer's Disease: A Case–Control Study and Call for a Consensus

Annals of Neurology, EarlyView.
Objective Sleep‐predominant network hyperexcitability is increasingly recognized as a potential disease‐accelerating comorbidity in Alzheimer's disease (AD). However, its prevalence and risk‐factors remain debated, largely due to cohort‐specific and methodological differences across studies.
Anna B. Szabo, Jonathan Curot, Fleur Gérard, Florence Rulquin, Rachel Debs, Claire Georges, Marie Denuelle, Amel Bouloufa, Béatrice Lemesle, Patrice Péran, Claire Thalamas, Emmanuel J. Barbeau, Jérémie Pariente, Lionel Dahan, Luc Valton   +14 more
wiley   +1 more source

Hiding in Plain Sight: Rethinking the Size and Complexity of Iron Age Hillforts in NW Iberia Thanks to Aerial Archaeology and Geophysics

Archaeological Prospection, EarlyView.
ABSTRACT This paper tackles one key limitation in the analysis of Iron Age communities in the Northwestern Iberian Peninsula: the limited exploration of areas beyond the fortified settlements known as castros (hillforts). The vast majority of archaeological studies have focused exclusively on the areas inside the walls of these settlements, which are ...
César Parcero‐Oubiña, Carlos Otero‐Vilariño, María Gómez‐Faro, Jesús Ignacio Jiménez Chaparro, Pastor Fábrega‐Álvarez, Juan Torrejón‐Valdelomar, Marta Crespo‐Fernández, David González‐Álvarez   +7 more
wiley   +1 more source

Persistent Optically Induced Magnetism in Oxygen-Deficient Strontium Titanate

, 2014
Strontium titanate (SrTiO$_3$) is a foundational material in the emerging field of complex oxide electronics. While its electronic and optical properties have been studied for decades, SrTiO$_3$ has recently become a renewed materials research focus ...
C. Leighton, G. Haugstad, J. D. Thompson, M. Bombeck, P. Ambwani, S. A. Crooker, W. D. Rice   +6 more
core   +1 more source

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

Towards Multi-Class Optically Pumped Magnetometer-Based Brain-Computer Interfaces

Current Directions in Biomedical Engineering
Magnetoencephalography (MEG) using optically pumped magnetometers (OPMs) offers several advantages over electroencephalography (EEG) and superconducting quantum interference device (SQUID)-based MEG, including improved spatial resolution and versatility.
Zerfowski Jan, Wimpff Martin, Anders Paul, Peekhaus Niels, Jonany Vincent, Soekadar Surjo R.   +5 more
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