Results 71 to 80 of about 3,346 (191)

Remote Magnetomechanical Neuromodulation Uncovers Therapeutic Mechanisms for Alleviating Parkinsonian Symptoms in Freely Moving Mice

Advanced Science, EarlyView.
Magnetomechanical neuromodulation using magnetic nanodiscs enables remote activation of neurons. In a hemiparkinsonian mouse model, alternating magnetic fields actuate the nanodiscs to generate torque that opens mechanosensitive ion channels within the subthalamic nucleus, thereby modulating basal ganglia motor circuitry.
Anouk Wolters, Lorenzo Signorelli, Christian Herff, Sophia Gimple, Renzo Riemens, Gunter Kenis, Kim Rijkers, Hamed Shabani, Jyh‐Jang Sun, Yasin Temel, Hans Clusmann, Danijela Gregurec, Sarah‐Anna Hescham   +12 more
wiley   +1 more source

New limit on Lorentz and CPT-violating neutron spin interactions

, 2010
We performed a search for neutron spin coupling to a Lorentz and CPT-violating background field using a magnetometer with overlapping ensembles of K and $^3$He atoms.
Brown, J. M., Kornack, T. W., Romalis, M. V., Smullin, S. J.   +3 more
core   +1 more source

Design and performance of an absolute 3He/Cs magnetometer [PDF]

, 2015
We report on the design and performance of a highly sensitive combined ³He/Cs magnetometer for the absolute measurement of magnetic fields. The magnetometer relies on the magnetometric detection of the free spin precession of nuclear spin polarized ³He ...
Bison, Georg, Grujić, Zoran D., Heil, Werner, Kasprzak, Malgorzata, Knowles, Paul, Koch, Hans-Christian, Kraft, Andreas, Pazgalev, Anatoly, Schnabel, Allard, Voigt, Jens, Weis, Antoine   +10 more
core   +2 more sources

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

Detection of a single cobalt microparticle with a microfabricated atomic magnetometer

, 2011
We present magnetic detection of a single, 2 {\mu}m diameter cobalt microparticle using an atomic magnetometer based on a microfabricated vapor cell. These results represent an improvement by a factor of 105 in terms of the detected magnetic moment over ...
Budker, Dmitry, Kitching, John, Knappe, Svenja, Ledbetter, Micah P., Maser, Daniel, Pandey, Saurabh, Ring, Hattie   +6 more
core   +1 more source

Multi‐material and dual‐stimulus coupled actuation micro‐gears for shape–rotation control in intelligent micro‐electro‐mechanical systems

FlexMat, EarlyView.
A multi‐material and dual‐stimulus coupled actuation micro‐gear (MDCAMG) is developed via femtosecond‐laser 3D printing combined with magnetic nanoparticle absorption, enabling integrated environmental sensing and remote actuation at the microscale. The device incorporates a pH‐responsive hydrogel matrix for autonomous swelling/shrinking and a magnetic
Sida Peng, Shengzhi Sun, Jian Li, Yi Zhu
wiley   +1 more source

Magnetic field imaging with microfabricated optically-pumped magnetometers

Optics Express, 2017
A multichannel imaging system is presented, consisting of 25 microfabricated optically-pumped magnetometers. The sensor probes have a footprint of less than 1 cm2 and a sensitive volume of 1.5 mm × 1.5 mm × 1.5 mm and connect to a control unit through optical fibers of length 5 m.
Alem, Orang, Mhaskar, Rahul, Jiménez-Martínez, Ricardo, Sheng, Dong, LeBlanc, John, Trahms, Lutz, Sander, Tilmann, Kitching, John, Knappe, Svenja   +8 more
openaire   +2 more sources

Magnetocardiography combined with machine learning for pulmonary hypertension detection and improved short‐term risk assessment

Interdisciplinary Medicine, EarlyView.
Magnetocardiography (MCG) enables non‐invasive mapping of cardiac magnetic fields. In this study, an MCG‐based machine learning model detects pulmonary hypertension with robust performance. Furthermore, MCG features may improve the accuracy of short‐term risk assessment.
Yuankun Qi, Jiaqi Liang, Kai Ma, Xiaoyu Hu, Yu Zhang, Xiaole Han, Dong Xu, Xu Zhang, Xiaopei Cui, Min Xiang, Hongyu Zhang, Jiancheng Fang   +11 more
wiley   +1 more source

Precision magnetic field modelling and control for wearable magnetoencephalography

NeuroImage, 2021
Optically-pumped magnetometers (OPMs) are highly sensitive, compact magnetic field sensors, which offer a viable alternative to cryogenic sensors (superconducting quantum interference devices – SQUIDs) for magnetoencephalography (MEG).
Molly Rea, Niall Holmes, Ryan M. Hill, Elena Boto, James Leggett, Lucy J. Edwards, David Woolger, Eliot Dawson, Vishal Shah, James Osborne, Richard Bowtell, Matthew J. Brookes   +11 more
doaj   +1 more source

Self-adaptive loop for external disturbance reduction in differential measurement set-up

, 2018
We present a method developed to actively compensate common-mode magnetic disturbances on a multi-sensor device devoted to differential measurements.
Bevilacqua, Giuseppe, Biancalana, Valerio, Dancheva, Yordanka, Vigilante, Antonio   +3 more
core   +1 more source