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Longitudinal gradient-coil with improved uniformity within the volume of interest
(2014)
We present a longitudinal magnetic fieldgradient-coil with optimized uniformity within the volume ofinterest (VOI). The accuracy of the optimization algorithm wasconfronted with measurements of the spatial dependence of ...
Longitudinal gradient coils with enhanced radial uniformity in restricted diameter: Single-current and multiple-current approaches
(Academic Press Inc Elsevier Science, 2017-03)
An important requirement for a gradient coil is that the uniformity of the generated magnetic field gradient should be maximal within the active volume of the coil. For a cylindrical geometry, the radial uniformity of the ...
A novel system of coils for magnetobiology research
(American Institute of Physics, 2016-11)
A novel system of coils for testing in vitro magnetobiological effects was designed, simulated, and built. Opposite to what is usual, the system generates a controlled gradient of magnetic field. This feature is introduced ...
Error bounds in diffusion tensor estimation using multiple-coil acquisition systems
(Elsevier Science Inc, 2013-06)
We extend the diffusion tensor (DT) signal model for multiple-coil acquisition systems. Considering the sum-of-squares reconstruction method, we compute the Cramér–Rao bound (CRB) assuming the widely accepted noncentral ...
Avaliação do efeito do gradiente de velocidade na agregação de partículas em unidades mistura completa e de fluxo pistonado
(Universidade Federal de Santa MariaBrasilEngenharia CivilUFSMPrograma de Pós-Graduação em Engenharia CivilCentro de Tecnologia, 2018-08-17)
In order to increase the knowledge about flocculation, unitary operation relevant for the water and wastewater treatment, the main goal of this study was to evaluate comparatively the effect of the velocity gradient (G) ...
Cooling and Warming Rates are Unaffected by Autonomic Vascular Control in the South American Rattlesnake (Crotalus durissus)
(Soc Brasileira Herpetologia, 2019-12-01)
Reptiles typically heat faster than they cool, and this thermal hysteresis is believed to derive from physiological mechanisms that modulate heat exchange with the environment through changes in thermal conductance. The ...
Super hybrid quadrupoles
(2012)
A new model of quadrupole composed of permanent magnetic material, coils and soft magnetic material is proposed for the new Brazilian Synchrotron Light Source (Sirius). These quadrupoles must have flexibility about 30% of ...
DESIGN AND TEST OF A 7-T SPLIT-PAIR MAGNET FOR MAGNETIC SEPARATION
(Institute of Electrical and Electronics Engineers (IEEE), 1994-07-01)
A 160 mm bore, 7 T split-pair magnet was constructed and tested aiming to mineral processing through HGMS (high gradient magnetic separation) or HCMS (helical channel magnetic separation.) This work describes the design ...