The root-mean-square magnetic field in turbulent diffusion

1978 ◽  
Vol 220 ◽  
pp. 330 ◽  
Author(s):  
E. Knobloch
Keyword(s):  
Magnetic Field ◽  
Root Mean Square ◽  
Turbulent Diffusion ◽  
Mean Square

Micro Magnetic Field Sensor Based On Terfenol-D/PZT/Terfenol-D Magnetoelectric Composites

2011 ◽  
Vol 483 ◽  
pp. 190-194 ◽  
Author(s):  
Yang Zheng ◽  
Dan Xie ◽  
Jing Ma ◽  
Tian Ling Ren ◽  
Li Tian Liu
Keyword(s):  
Magnetic Field ◽  
Root Mean Square ◽  
Magnetic Measurement ◽  
Magnetic Sensor ◽  
Magnetic Field Sensor ◽  
Mean Square ◽  
Magnetoelectric Composites ◽  
New Type ◽  
Field Sensor

A new type of magnetic sensor based on magnetoelectric(ME) composites has been designed and fabricated. The ME composites has a Terfenol-D/PZT/Terfenol-D structure and its ME coefficient is 0.36 V/cm Oe at room temperture. The sensor has AC magnetic measurement ranges from 0.02 Oe to 12 Oe, reaches a sensitivity of 5×10-3 Oe and has a flat response within 15 kHz. The sensor is equipped with a pre-amplifier and an Root Mean Square(RMS) value convertor.

Comparison of Magnetic Tracking and Optical Tracking by Simultaneous Use of Two Independent Frameless Stereotactic Systems

2005 ◽  
Vol 57 (suppl_4) ◽  
pp. ONS-295-ONS-301 ◽  
Author(s):  
Christopher R. Mascott
Keyword(s):  
Magnetic Field ◽  
Root Mean Square ◽  
Magnetic System ◽  
Tracking System ◽  
Optical Tracking ◽  
Preoperative Imaging ◽  
Mean Square ◽  
Anatomic Landmarks ◽  
Optical Tracking System ◽  
Magnetic Tracking

Abstract OBJECTIVE: The goal of this study was to compare the calculated accuracy and the true surgical accuracy of a magnetic and an optical tracking system at surgical registration and during surgery. METHODS: Two Food and Drug Administration-approved, commercially available frameless stereotactic systems were used simultaneously in 70 surgical cases. The Compass Cygnus-PFS system (Compass International, Rochester MN) uses magnetic field referencing and tracking. The StealthStation (Medtronic SNT, Louisville, CO) uses optical referencing and tracking. Registration was performed for each of the systems using adhesive fiducial markers, cranial-implanted markers, anatomic landmarks, or a combination thereof. Preoperative imaging consisted of volumetric computed tomography, magnetic resonance imaging, or both. Calculated accuracy was given by each of the systems as the root mean square after registration. Surgical accuracy was assessed by comparing the anatomic accuracy of each system with a number of recognizable intraoperative anatomic landmarks RESULTS: Calculated accuracy (root mean square) was 1.4 ± 0.6 mm using the magnetic system and 1.4 ± 0.8 mm using the optical tracking system. In the 42 patients with implanted cranial fiducials, the calculated accuracies were 1.0 ± 0.5 mm (magnetic) and 0.9 ± 0.4 mm (optical). True surgical accuracy was considered good (3 mm or less) in both systems in 60 of 70 patients. In two patients, neither system was accurate. In eight patients, one of the two systems was considered inaccurate. Of these, the magnetic system was considered inaccurate three times and the optical system five times. CONCLUSION: Magnetic referencing and tracking was found to be comparable with optical tracking both with regard to calculated and true surgical accuracy. Interference from metal objects in the magnetic field was seen rarely.

scholarly journals Шумовые характеристики оптического отклика феррожидкостей на воздействие магнитного поля

2019 ◽  
Vol 45 (15) ◽  
pp. 3
Author(s):  
А.В. Прокофьев ◽  
И.В. Плешаков ◽  
M. Shlyagin ◽  
П.М. Агрузов ◽  
Е.Е. Бибик ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Light Intensity ◽  
Field Strength ◽  
Optical Fiber ◽  
Root Mean Square ◽  
Significant Enhancement ◽  
Mean Square ◽  
Slow Decrease ◽  
The Magnetic Field

The noise, produced by different ferrofluidic samples under their probing by optical fiber method, investigated. It is shown that the magnetic field switching on leads to its significant enhancement, which presumably connected with fluctuations, accompanying the process of aggregates formation. The dependencies of root mean square value of the noise on the field strength and the probing light intensity are obtained. The slow decrease of the noise root mean square value after the field switching off, reflecting the field formatted aggregates relaxation, revealed.

The Relationship of Root Mean Square Value of Electromyography and Isometric Torque of Quadriceps in Normal Subjects

2016 ◽  
Vol 26 (1) ◽  
pp. 58
Author(s):  
Qiurong XIE ◽  
Zheng JIANG ◽  
Qinglu LUO ◽  
Jie LIANG ◽  
Xiaoling WANG ◽  
...  
Keyword(s):  
Root Mean Square ◽  
Normal Subjects ◽  
Mean Square ◽  
Isometric Torque ◽  
Relationship Of ◽  
The Relationship
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