- 行业: Education
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A member of the University of Texas System, UT Dallas is a public research university with 125 academic programs offered through its seven schools. Many of the university's strongest and most popular programs are in business, the sciences, and applied sciences. UTD's admissions standards are among ...
Instruments, usually balloonborne, for the simultaneous measurement and transmission of meteorological data while moving vertically through the atmosphere.
Industry:Physics
Generic term for rapid variations in apparent position, brightness, or color of a distant luminous object viewed through the atmosphere. A flash of light produced in a phosphor by an ionizing event. On a radar display, a rapid apparent displacement of the target from its mean position.
Industry:Physics
Surfaces or sheets of discontinuity (i.e., abrupt changes in conditions) set up in a supersonic fields of flow, through which the fluids undergo a finite decrease in velocity accompanied by a marked increase in pressure, density, temperature, and entropy, as occurs, e.g., in supersonic flows about bodies.
Industry:Physics
The study of the interaction that exists between a magnetic field and an electrically conducting fluid. Used for geometrical hydromagnetics, hydromagnetics, hydromagnetism, and magnetogasdynamics.
Industry:Physics
Multi-scale variations in plasma density due to electric fields, heating, mixing, precipitation, recombination and various instability mechanisms.
Industry:Physics
Increased auroral activity in the polar cap region. A very long sun-aligned arc can form in the polar cap when an ordered multi cell flow pattern forms under IMF northward conditions. The circular auroral oval is linked from day to night by a sun-aligned auroral emission. The entire feature is referred to as theta aurora. The particle energies associated with these auroras are in the soft category (<100ev) and both the plasma production and auroral airglow emissions therefore occur at lower F-region or upper E-region altitudes. Other experiments also show that sun-aligned arcs seem to occur in a region of shear in the plasma. Data suggests that electron precipitation occurs in a region where the flow vorticity has a positive sign.
Industry:Physics
Concentrations of free electrons and protons in the ionosphere, plasmasphere, and beyond.
Industry:Physics
Envelopes of charged particles trapped in the magnetic field of a spatial body. Used for geomagnetically trapped particles and Van Allen radiation belts.
Industry:Physics
Low frequency waves in an electrically highly conducting fluid (such as a plasma) permeated by static magnetic fields. The restoring forces of the waves are, in general, the combination of a magnetic tensile stress along the magnetic field lines and the comprehensive stress between the field lines and the fluid pressure. Used for Alfven waves, hydromagnetic waves, and plasma sound waves.
Industry:Physics
Compression (of a gas, plasma, etc. not accompanied by gain or loss of heat from outside the system. For a plasma in a magnetic field, a compression slow enough that the magnetic moment and other adiabatic invariants of the plasma particles may be taken as constant.
Industry:Physics
