Results 11 to 20 of about 22,531 (109)

Measuring lung resistivity using electrical impedance tomography [PDF]

IEEE Transactions on Biomedical Engineering, 1992
We propose the use of electrical impedance tomography (EIT) imaging techniques in the measurement of lung resistivity for detection and monitoring of apnea and edema. In EIT, we inject currents into a subject using multiple electrodes and measure boundary voltages to reconstruct a cross-sectional image of internal resistivity distribution.
E J, Woo, P, Hua, J G, Webster, W J, Tompkins   +3 more
openaire   +2 more sources

Predicting the movements of permanently installed electrodes on an active landslide using time-lapse geoelectrical resistivity data only [PDF]

, 2010
If electrodes move during geoelectrical resistivity monitoring and their new positions are not incorporated in the inversion, then the resulting tomographic images exhibit artefacts that can obscure genuine time-lapse resistivity changes in the ...
Chambers, Jonathan E., Gunn, David A., Kuras, Oliver, Meldrum, Philip I., Ogilvy, Richard D., Wilkinson, Paul B.   +5 more
core   +1 more source

Monitoring hydraulic processes with automated time-lapse electrical resistivity tomography (ALERT) [PDF]

, 2009
Hydraulic processes in porous media can be monitored in a minimally invasive fashion by time-lapse electrical resistivity tomography (ERT). The permanent installation of specifically designed ERT instrumentation, telemetry and information technology (IT)
Chambers, J.E., Kuras, O., Meldrum, P.I., Ogilvy, R.D., Pritchard, J.D., Wealthall, G.P., Wilkinson, P.B.   +6 more
core   +2 more sources

Pavement testing by integrated geophysical methods: Feasibility, resolution and diagnostic potential [PDF]

, 2017
This work is focused on the assessment of the diagnostic potential of several geophysical methods when applied to the investigation of a rigid airport pavement.
CARDARELLI, Ettore, CERCATO, MICHELE, DE DONNO, GIORGIO, DI GIAMBATTISTA, LUCA, ORLANDO, Luciana   +4 more
core   +1 more source

Estimation of the hydraulic parameters of unsaturated samples by electrical resistivity tomography [PDF]

, 2012
In situ and laboratory experiments have shown that electrical resistivity tomography (ERT) is an effective tool to image transient phenomena in soils. However, its application in quantifying soil hydraulic parameters has been limited.
Bear J., Brooks R. H., Comina C., Comina C., Corey A. T., Dalla E., Deiana R., G. DELLA VECCHIA, G. MUSSO, Hadamard J., Hillel A. C., Hopmans J. W., Lee J. Y., Menke W., Michot D., Mitchell J. K., R.M. COSENTINI, Reynolds J. M., Romero E., S. FOTI, Santamarina J. C., Singha K., Tikhonov A. N., Vanderborght J.   +23 more
core   +1 more source

Geophysical investigation of the Pb-Zn deposit of Lontzen-Poppelsberg, Belgium [PDF]

, 2018
The drillhole information from the Lontzen-Poppelsberg site has demonstrated three orebodies and has allowed the estimation of the extension of the lodes, their dip, and the location at the ground surface.
Chouteau, Michel, Dumont, Gaël, Evrard, Maxime, Francis, Olivier, Hermans, Thomas, Nguyen, Frédéric, Pirard, Eric   +6 more
core   +5 more sources

Absolute electrical impedance tomography (aEIT) guided ventilation therapy in critical care patients: simulations and future trends [PDF]

, 2010
Thoracic electrical impedance tomography (EIT) is a noninvasive, radiation-free monitoring technique whose aim is to reconstruct a cross-sectional image of the internal spatial distribution of conductivity from electrical measurements made by injecting ...
Brown, B.H., Denai, M., Mahfouf, M., Mills, G.H., Mohamad-Samuri, S., Panoutsos, G.   +5 more
core   +2 more sources

Electrical permittivity and resistivity time lapses of multiphase DNAPLs in a lab test [PDF]

, 2014
Dense Non-Aqueous Phase Liquids (DNAPLs) induce variation in electromagnetic characteristics of the ground e.g. electric permittivity and resistivity.
Orlando, Luciana, Renzi, Beatrice
core   +2 more sources

Long term time-lapse microgravity and geotechnical monitoring of relict salt-mines, Marston, Cheshire, UK. [PDF]

, 2012
The area around the town of Northwich in Cheshire, U. K., has a long history of catastrophic ground subsidence caused by a combination of natural dissolution and collapsing abandoned mine workings within the underlying Triassic halite bedrock geology. In
Branston, M, Furner, R, Howell, C, Pringle, JK, Styles, P, Toon, S   +5 more
core   +3 more sources

Introduction to tensorial resistivity probability tomography

, 2005
The probability tomography approach developed for the scalar resistivity method is here extended to the 2D tensorial apparent resistivity acquisition mode.
Mauriello, Paolo, Patella, Domenico
core   +1 more source