نتایج جستجو برای: gradiometer

تعداد نتایج: 262  

Journal: :Epilepsy research 2010
Kotaro Sakurai Youji Takeda Naoaki Tanaka Tsugiko Kurita Hideaki Shiraishi Fumiya Takeuchi Shingo Nakane Keitaro Sueda Tsukasa Koyama

This study uses magnetoencephalography (MEG) to examine whether cortical regions that constitute a default mode network are involved during generalized spike-wave discharges (GSWs) in patients with juvenile absence epilepsy (JAE). We studied five JAE patients for whom MEG was recorded using a 204-channel, whole-head gradiometer system. Dynamic statistical parametric mapping (dSPM) was done to e...

2018
Xikai Liu Dong Ma Liang Chen Xiangdong Liu

Tuning the stiffness balance is crucial to full-band common-mode rejection for a superconducting gravity gradiometer (SGG). A reliable method to do so has been proposed and experimentally tested. In the tuning scheme, the frequency response functions of the displacement of individual test mass upon common-mode accelerations were measured and thus determined a characteristic frequency for each t...

2002
U. Yurtsever D. Strekalov J. P. Dowling

A quantum gravity-gradiometer consists of two spatially separated ensembles of atoms interrogated by pulses of a common laser beam. The laser pulses cause the probability amplitudes of atomic ground-state hyperfine levels to interfere, producing two, motion-sensitive, phase shifts, which allow the measurement of the average acceleration of each ensemble, and, via simple differencing, of the acc...

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