We report on field-aligned currents (FAC) obtained from precise magnetic field measurements made onboard the Orsted and Magsat satellites when the interplanetary magnetic field (IMF) was near zero. We found that Region 1/Region 2 currents persist through southward IMF, IMF -• 0, and northward IMF; also the central area of both the northern and southern polar caps is always filled with FACs, eve...

Background Current inertial motion capture systems are rarely used in biomedical applications. The attachment and connection of the sensors with cables is often a complex and time consuming task. Moreover, it is prone to errors, because each sensor has to be attached to a predefined body segment. By using wireless inertial sensors and automatic identification of their positions on the human bod...

Tetration F as the analytic solution of equations F (z − 1) = ln(F (z)), F (0) = 1 is considered. The representation is suggested through the integral equation for values of F at the imaginary axis. Numerical analysis of this equation is described. The straightforward iteration converges within tens of cycles; with double precision arithmetics, the residual of order of 1.e14 is achieved. The nu...

Abstract Gear measuring instrument (GMI) is the mainstream equipment for gear measurement. As measurement accuracy of gears improves and GMI gradually used in production, thermal errors are becoming an important factor affecting GMI. In precision gears, parallelism between axis Z-axis major error source. This usually reduced by mechanical adjustment when a assembled. When temperature its enviro...

The distribution of the solar cosmic radiation flux over the earth is not uniform, but the result of complex phenomena involving the interplanetary magnetic field, the geomagnetic field and latitude and longitude of locations on the earth. The latitude effect relates to the geomagnetic shield; the longitude effect relates to local time. For anisotropic solar cosmic ray events the maximum partic...

Observational evidence of the location of a dayside high-latitude ionospheric current (DPY current) with respect to the different regimes of the high-latitude magnetosphere is obtained by analyzing data from the magnetometer chain along the west coast of Greenland in conjunction with simultaneous measurements from the newly established incoherent-scatter radar facility at Sondre Stromfjord. The...