Three-dimensional quasi-static magnetic field in superconducting-rotor synchronous generators with a magnetic steel rotor screen

1986 ◽  
Vol 133 (2) ◽  
pp. 69 ◽  
Author(s):  
L. Leurs ◽  
R.L. Stoll
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Three Dimensional ◽  
Synchronous Generators ◽  
Magnetic Steel

scholarly journals Use of Magnetic Field for Mitigating Gyroscope Errors for Indoor Pedestrian Positioning

Sensors ◽  
2018 ◽  
Vol 18 (8) ◽  
pp. 2592 ◽  
Author(s):  
Ming Ma ◽  
Qian Song ◽  
Yang Gu ◽  
Zhimin Zhou
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Inertial Navigation System ◽  
Three Dimensional ◽  
Calibration Method ◽  
Rate Of Change ◽  
Superior Performance ◽  
Novel Approach ◽  
Straight Line ◽  
Magnetometer Calibration

In the field of indoor pedestrian positioning, the improved Quasi-Static magnetic Field (iQSF) method has been proposed to estimate gyroscope biases in magnetically perturbed environments. However, this method is only effective when a person walks along straight-line paths. For other curved or more complex path patterns, the iQSF method would fail to detect the quasi-static magnetic field. To address this issue, a novel approach is developed for quasi-static magnetic field detection in foot-mounted Inertial Navigation System. The proposed method detects the quasi-static magnetic field using the rate of change in differences between the magnetically derived heading and the heading derived from gyroscope. In addition, to eliminate the distortions caused by system platforms and shoes, a magnetometer calibration method is developed and the calibration is transformed from three-dimensional to two-dimensional coordinate according to the motion model of a pedestrian. The experimental results demonstrate that the proposed method can provide superior performance in suppressing the heading errors with the comparison to iQSF method.

Three-dimensional mapping of the static magnetic field inside the human head

1996 ◽  
Vol 36 (5) ◽  
pp. 705-714 ◽  
Author(s):  
Shizhe Li ◽  
Bernard J. Dardzinski ◽  
Christopher M. Collins ◽  
Qing X. Yang ◽  
Michael B. Smith
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Three Dimensional ◽  
Human Head ◽  
Three Dimensional Mapping ◽  
Dimensional Mapping

scholarly journals 3D Superparamagnetic Scaffolds for Bone Mineralization under Static Magnetic Field Stimulation

Materials ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 2834 ◽  
Author(s):  
Irina Alexandra Paun ◽  
Bogdan Stefanita Calin ◽  
Cosmin Catalin Mustaciosu ◽  
Mona Mihailescu ◽  
Antoniu Moldovan ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Magnetic Nanoparticle ◽  
Bone Mineralization ◽  
Three Dimensional ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Osteoblast Cells ◽  
Matrix Mineralization ◽  
Homogenous Distribution

We reported on three-dimensional (3D) superparamagnetic scaffolds that enhanced the mineralization of magnetic nanoparticle-free osteoblast cells. The scaffolds were fabricated with submicronic resolution by laser direct writing via two photons polymerization of Ormocore/magnetic nanoparticles (MNPs) composites and possessed complex and reproducible architectures. MNPs with a diameter of 4.9 ± 1.5 nm and saturation magnetization of 30 emu/g were added to Ormocore, in concentrations of 0, 2 and 4 mg/mL. The homogenous distribution and the concentration of the MNPs from the unpolymerized Ormocore/MNPs composite were preserved after the photopolymerization process. The MNPs in the scaffolds retained their superparamagnetic behavior. The specific magnetizations of the scaffolds with 2 and 4 mg/mL MNPs concentrations were of 14 emu/g and 17 emu/g, respectively. The MNPs reduced the shrinkage of the structures from 80.2 ± 5.3% for scaffolds without MNPs to 20.7 ± 4.7% for scaffolds with 4 mg/mL MNPs. Osteoblast cells seeded on scaffolds exposed to static magnetic field of 1.3 T deformed the regular architecture of the scaffolds and evoked faster mineralization in comparison to unstimulated samples. Scaffolds deformation and extracellular matrix mineralization under static magnetic field (SMF) exposure increased with increasing MNPs concentration. The results are discussed in the frame of gradient magnetic fields of ~3 × 10−4 T/m generated by MNPs over the cells bodies.

Study of Three-Dimensional Polishing Using Magnetic Compound Fluid (MCF)

2009 ◽  
Vol 76-78 ◽  
pp. 288-293 ◽  
Author(s):  
Takashi Sato ◽  
Yong Bo Wu ◽  
Wei Min Lin ◽  
Kunio Shimada
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Permanent Magnet ◽  
Static Magnetic Field ◽  
Magnetic Particles ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Flexible Tool ◽  
Three Dimensional Structure ◽  
Polishing Force

Magnetic compound fluid (MCF), a functional fluid responding to magnetic field, is expected for an application to many engineering fields. In this paper, the effect of magnetic fields on the polishing force and the restoring ability of the MCF are studied followed by the proposal of a new polishing technique using the MCF. Under a fluctuating magnetic field generated by a revolution of permanent magnet, the magnetic particles in the MCF show a higher particle disposition and an accumulating action compared to a static magnetic field. Thus the MCF generates the greater restoring ability but the lower polishing force compared to that under the static magnetic field. When the MCF under the fluctuating magnetic field is applied to the polishing as the flexible tool, it shows the high polishing performance. As a result, a feasibility of a new polishing technique using the MCF for a three-dimensional structure is confirmed.

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