Measurement of Maxwell's displacement current

Laser Doppler Displacement Measurement

Existing precision displacement-measuring devices are primarily based on linear encoders (optical or magnetic) or laser interferometers. Most encoders use grating scales and frequency counters, while most interferometers use stabilized lasers and fringe counters. In general, interferometers are more expensive and more accurate than linear encoders. However, there are large gaps in price and per...

From Maxwell’s displacement current to superconducting current

We investigate the nature of the superconducting current from the Maxwell’s displacement current. We argue that the conduction current density term of the Maxwell’s equations is physically untrue, and it should be eliminated from the equations. Essentially, both the superconducting current and conduction current are originated from the Maxwell’s displacement current characterizing the changes o...

Nanoscale Displacement and Strain Measurement

The mechanical testing of micro-electro-mechanical systems (MEMS) and nano-electro-mechanical systems (NEMS) requires precise measurements of displacement and strain in the nanometer scale. Integrated testing devices, including specimens, actuators and sensors, were designed and fabricated to overcome the aligning and gripping difficulties faced by previous separated micromechanical testing app...

Wholefiled Optical Metrology: Surface Displacement Measurement Wholefield Optical Metrology: Surface Displacement Measurement

Meridional displacement of the Antarctic Circumpolar Current.

Observed long-term warming trends in the Southern Ocean have been interpreted as a sign of increased poleward eddy heat transport or of a poleward displacement of the entire Antarctic Circumpolar Current (ACC) frontal system. The two-decade-long record from satellite altimetry is an important source of information for evaluating the mechanisms governing these trends. While several recent studie...