نتایج جستجو برای: gradiometer
تعداد نتایج: 262 فیلتر نتایج به سال:
Gravity field modeling in the case of GOCE is based on a combination of the SST contribution for the low wavelength part and on gravitational gradiometry for the spatial details. The gradiomter part of the solution is derived from a combination of the gradient components Vxx, Vyy, Vzz. Variance components in the domain of spherical harmonics allow the analysis of the characteristic contribution...
The measurement of the impedance of biological tissue can be a non-invasive method to find new data of diagnostic relevance. A system for a noncontact measurement of the electrical impedance of biological tissue is presented. The system consists of an excitation coil and two sensing coils coupled together as a gradiometer. The excitation coil is driven by an alternating current. Due to this alt...
The Einstein equivalence principle (EEP) has a central role in the understanding of gravity and space-time. In its weak form, or weak equivalence principle (WEP), it directly implies equivalence between inertial and gravitational mass. Verifying this principle in a regime where the relevant properties of the test body must be described by quantum theory has profound implications. Here we report...
Magnetocardiography measurements with 4He vector optically pumped magnetometers at room temperature.
In this paper, we present a proof of concept study which demonstrates for the first time the possibility of recording magnetocardiography (MCG) signals with 4He vector optically pumped magnetometers (OPM) operated in a gradiometer mode. Resulting from a compromise between sensitivity, size and operability in a clinical environment, the developed magnetometers are based on the parametric resonan...
The measurement of the impedance of biological tissue can be a non-invasive method to find new data of diagnostic relevance. A system for a non-contact measurement of the electrical impedance of biological tissue is presented. The system consists of an excitation coil and two sensing coils, an upper and a lower coil. If the two sensing coils are coupled it can be used as a gradiometer coil. Num...
Abstract Recent research at Soba focuses on the tangible and intangible heritage of medieval capital Alwa kingdom, whose remains cover approximately 275 ha. About 222 ha this area has been built up or transformed into agricultural land in past 30 years. An ethnographic survey was also carried out built-up to understand how residents engage with archaeological material remains. The undeveloped (...
Compensation of SQUID gradient data in a magnetic tensor gradiometer system for airborne exploration
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