Zobrazeno 1 - 10
of 24
pro vyhledávání: '"E. Andrade Lima"'
Publikováno v:
Superconductor Science and Technology. 15:1259-1267
We present a two-dimensional deconvolution technique to estimate the original magnetic field from the flux measured by SQUID planar gradiometers. While modelling the gradiometer as a spatial filter, we use a pseudo-inverse filtering to perform the de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fbfe1b3690bf28ac24576c330db7bf2d
https://doi.org/10.1088/0953-2048/15/8/316
https://doi.org/10.1088/0953-2048/15/8/316
Experimental verification of a spatial deconvolution procedure for planar gradiometer configurations
Autor:
Antonio C. Bruno, E. Andrade Lima
Publikováno v:
Physica C: Superconductivity. 368:100-104
By using a spatial filter model for planar gradiometers and a deconvolution procedure we were able to retrieve the magnetic field from flux measurements made by planar gradiometers configurations. Because the spatial filter model relies only on geome
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3831e6b6f1a16cbdf758168d33fd8b41
https://doi.org/10.1016/s0921-4534(01)01147-9
https://doi.org/10.1016/s0921-4534(01)01147-9
Autor:
C. Hall Barbosa, E. Costa Monteiro, E. Andrade Lima, P. Costa Ribeiro, Samuel Santos, Eric G. Cavalcanti, P. H. Ornelas
Publikováno v:
Physica C: Superconductivity. 354:83-86
The underlying electrical mechanism associated with self-sustained arrhythmias such as cardiac flutter and fibrillation is not completely elucidated. Most of the evidence points towards a reentry path, but the hypothesis of firing of an ectopic focus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e92c61b1b3e2b8c8f1ea180275dd8240
https://doi.org/10.1016/s0921-4534(01)00055-7
https://doi.org/10.1016/s0921-4534(01)00055-7
Autor:
E. Andrade Lima, Antonio C. Bruno
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 11:1299-1302
The detection by magnetic techniques of corrosion pits on pipes covered with thermal insulation is critical. Without removing the insulating layer, SQUID technology is the only one available, because the sensor must be placed at a distance from the p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06b126918bd7b5cd8a780a0c897f0b9b
https://doi.org/10.1109/77.919588
https://doi.org/10.1109/77.919588
Publikováno v:
Physics in Medicine and Biology. 45:2389-2402
A technique has been developed, based on magnetic field measurements, to localize, in three dimensions, hypodermic and sewing needles lost in the human body. A theoretical model for the magnetic field generated by needles has been elaborated and expe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02715afdb945e5701875ae964ed0e3df
https://doi.org/10.1088/0031-9155/45/8/323
https://doi.org/10.1088/0031-9155/45/8/323
Publikováno v:
The European Physical Journal Applied Physics. 10:67-71
Forward solution studies have been performed using a cellular automata computer model. This computational procedure has been applied to simulate cardiac tissue activation and its corresponding magnetic field generated has been calculated. The propaga
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1ac819d2be08a672a97c228555fc4e7
https://doi.org/10.1051/epjap:2000120
https://doi.org/10.1051/epjap:2000120
Publikováno v:
Superconductor Science and Technology. 12:949-952
Planar gradiometers can be modelled as two-dimensional spatial filters, taking into account area, baseline and shape of the coils. We associate a spatial frequency response with each configuration studied and show that planar gradiometers behave as b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d617361e17a0b78b47b98948db7fcb6
https://doi.org/10.1088/0953-2048/12/11/376
https://doi.org/10.1088/0953-2048/12/11/376
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:3523-3526
A straightforward experimental procedure for calibration of axial SQUID gradiometers has been developed, based on numerical optimization techniques. A dc current carrying wire of finite length, whose magnetic field spatial distribution is well known,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3bc72381b0dd558d788a0e3f6f58680a
https://doi.org/10.1109/77.783790
https://doi.org/10.1109/77.783790
Publikováno v:
IEEE Transactions on Magnetics. 34:2912-2915
The generalized inverse method and singular value decomposition were used to reconstruct the magnetic image of small spherical inclusions in ferromagnetic structures. These techniques were used on the magnetic flux leakage generated when the structur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::093238b7093dcc7c3e5f156bd8cc29e6
https://doi.org/10.1109/20.717679
https://doi.org/10.1109/20.717679
Autor:
Michael Eiselt, F. Gießler, E. Andrade Lima, E. Costa Monteiro, C. Hall Barbosa, Jens Haueisen
Publikováno v:
Biomedizinische Technik/Biomedical Engineering. 46:70-72
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4713cbe38ea7814b060a43c2d68d4279
https://doi.org/10.1515/bmte.2001.46.s2.70
https://doi.org/10.1515/bmte.2001.46.s2.70