Results 101 to 110 of about 90,554 (217)

Feasibility study on on-board magnetoencephalography with optically pumped magnetometers

AIP Advances
In this study, the theoretical feasibility of utilizing optically pumped magnetometers for on-board magnetoencephalography measurements was explored.
Xinyu Cao, Motofumi Fushimi, Shinichi Chikaki, Akihiro Kuwahata, Masaki Sekino   +4 more
doaj   +1 more source

Comparison of discharge lamp and laser pumped cesium magnetometers [PDF]

, 2018
We have performed a comparison of laser (LsOPM) and lamp (LpOPM) pumped cesium vapor magnetometers. Although the LsOPM operated 50% above its shot-noise limit we found an intrinsic sensitivity of 15 fT/√Hz and 25 fT/√Hz for the LsOPM and the LpOPM ...
Groeger, S., Pazgalev, A., Weis, A.
core  

A large-scale magnetic shield with 10^6 damping at mHz frequencies

, 2015
We present a magnetically shielded environment with a damping factor larger than one million at the mHz frequency regime and an extremely low field and gradient over an extended volume.
Altarev, I., Bales, M., Beck, D. H., Chupp, T., Fierlinger, K., Fierlinger, P., Kuchler, F., Lins, T., Marino, M. G., Niessen, B., Petzoldt, G., Schläpfer, U., Schnabel, A., Singh, J. T., Stoepler, R., Strum, M., Stuiber, S., Taubenheim, B., Voigt, J.   +18 more
core   +1 more source

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

Ultra-sensitive Magnetic Microscopy with an Optically Pumped Magnetometer [PDF]

Scientific Reports, 2016
AbstractOptically pumped magnetometers (OPMs) based on lasers and alkali-metal vapor cells are currently the most sensitive non-cryogenic magnetic field sensors. Many applications in neuroscience and other fields require high-resolution, high-sensitivity magnetic microscopic measurements. In order to meet this demand we combined a cm-size spin-exchange
Young Jin Kim, Igor Savukov
openaire   +2 more sources

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

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

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

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

On‐scalp magnetoencephalography based on optically pumped magnetometers to investigate temporal lobe epilepsy

medRxiv
Cryogenic magnetoencephalography (MEG) has a lower yield in temporal lobe epilepsy (TLE) than in extratemporal lobe epilepsy. The advent of optically pumped magnetometers (OPMs) might change this situation thanks to on‐scalp MEG.
O. Feys, Vincent Wens, Chantal Depondt, Estelle Rikir, Nicolas Gaspard, W. van Paesschen, Alec Aeby, Olivier Bodart, E. Carrette, Niall Holmes, Matthew J. Brookes, M. Ferez, P. Corvilain, X. De Tiège   +13 more
semanticscholar   +1 more source