Response of equatorial-low latitude ionosphere
... Abstract. The response of the equatorial-low latitude nightside ionosphere to the geomagnetic negative sudden impulse(si-) on March 15, 1993 is studied using recordings of Doppler velocity of ionospheric echoes at vertical incidence at Kodaikanal(10.2°N) and Doppler shift of standard HF signals on o ...
... Abstract. The response of the equatorial-low latitude nightside ionosphere to the geomagnetic negative sudden impulse(si-) on March 15, 1993 is studied using recordings of Doppler velocity of ionospheric echoes at vertical incidence at Kodaikanal(10.2°N) and Doppler shift of standard HF signals on o ...
Lecture 2. Thermal evolution and surface emission of neutron stars
... In both studies only upper limits were derived. Still, the zero result can be just due to unfavorable orientations (at long periods NSs have very narrow beams). It is necessary to increase statistics. ...
... In both studies only upper limits were derived. Still, the zero result can be just due to unfavorable orientations (at long periods NSs have very narrow beams). It is necessary to increase statistics. ...
Other types of electromagnetic clutches
... usually due to heat which has caused the insulation of the coil wire to break down. The heat can be caused by high ambient temperature, high cycle rates, slipping or applying too high of a voltage. Bushings can be used in some clutches that have low speed, low side loads or low operating hours. At h ...
... usually due to heat which has caused the insulation of the coil wire to break down. The heat can be caused by high ambient temperature, high cycle rates, slipping or applying too high of a voltage. Bushings can be used in some clutches that have low speed, low side loads or low operating hours. At h ...
Power Point slides for Reporter Review
... Electrostatic Coupling and Acceleration of Auroral Electrons (Observations) Direct measurements of parallel electric fields Upward current region: FAST shows large E|| (~ 100 mV/m) at lower edge of auroral density cavity (Ergun et al., 2002) parallel electric fields of 25-300 mV/m seen on Polar; ...
... Electrostatic Coupling and Acceleration of Auroral Electrons (Observations) Direct measurements of parallel electric fields Upward current region: FAST shows large E|| (~ 100 mV/m) at lower edge of auroral density cavity (Ergun et al., 2002) parallel electric fields of 25-300 mV/m seen on Polar; ...
electromagnetic waves
... (b) The hypothesis of ether (a medium permeating all of space, and endowed with very special properties) is a natural idea based on Maxwell’s equations (through we know now that the hypothesis is incorrect). Explain why the ether is such a natural idea ? (c) Are Maxwell’s equations modified by Einst ...
... (b) The hypothesis of ether (a medium permeating all of space, and endowed with very special properties) is a natural idea based on Maxwell’s equations (through we know now that the hypothesis is incorrect). Explain why the ether is such a natural idea ? (c) Are Maxwell’s equations modified by Einst ...
Penumbral thermal structure below the visible surface
... Context. The thermal structure of the penumbra below its visible surface (i.e., τ5 ≥ 1) has important implications for our present understanding of sunspots and their penumbrae: their brightness and energy transport, mode conversion of magneto-acoustic waves, sunspot seismology, and so forth. Aims. ...
... Context. The thermal structure of the penumbra below its visible surface (i.e., τ5 ≥ 1) has important implications for our present understanding of sunspots and their penumbrae: their brightness and energy transport, mode conversion of magneto-acoustic waves, sunspot seismology, and so forth. Aims. ...
Document
... • Aerosols are charged negatively and move to the location of highest potential • In etching reactors (for the semiconductor industry), accumulation of aerosols somewhere in between electrodes • As long as there is a plasma and limited velocity of the gas, aerosols do not deposit on the surface • If ...
... • Aerosols are charged negatively and move to the location of highest potential • In etching reactors (for the semiconductor industry), accumulation of aerosols somewhere in between electrodes • As long as there is a plasma and limited velocity of the gas, aerosols do not deposit on the surface • If ...
Magnetohydrodynamics
Magnetohydrodynamics (MHD) (magneto fluid dynamics or hydromagnetics) is the study of the magnetic properties of electrically conducting fluids. Examples of such magneto-fluids include plasmas, liquid metals, and salt water or electrolytes. The word magnetohydrodynamics (MHD) is derived from magneto- meaning magnetic field, hydro- meaning water, and -dynamics meaning movement. The field of MHD was initiated by Hannes Alfvén, for which he received the Nobel Prize in Physics in 1970.The fundamental concept behind MHD is that magnetic fields can induce currents in a moving conductive fluid, which in turn polarizes the fluid and reciprocally changes the magnetic field itself. The set of equations that describe MHD are a combination of the Navier-Stokes equations of fluid dynamics and Maxwell's equations of electromagnetism. These differential equations must be solved simultaneously, either analytically or numerically.