active region

Also found in: Acronyms

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active region [′ak·tiv ′rē·jən]

(astronomy)

A localized, transient, nonuniform region on the sun's surface, penetrating well down into the lower chromosphere.

(electronics)

The region in which amplifying, rectifying, light emitting, or other dynamic action occurs in a semiconductor device.

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No references found			Because the Tibetan Plateau is one of the most seismically active regions in the world, we believe there is credible evidence for a new major quake in this region," said Lin, a geophysicist at WHOI. Temblor in China raises risk of more big quakes nearby by Carlowicz, Mike; Lippsett, Lonny / Oceanus Your hands, feet and the groin area are some of the most active regions of perspiration since they? How to Stop Sweating Hyperhidrosis by Catherine Sheehan / Health care industry community Charges are delivered to the transistor's quantum well active region, where they either recombine almost instantly, or they are kept moving on out of the device. Scientists break light modulation speed record by Asian News International			active lateral pressure active layer active leaf active leg active location system active logic active margin active master file active master item active material active matrix active matrix display Active Measurement Project Active Membership active mirror active monitor Active Monitoring active network active object active oxygen method active permafrost Active Power active prominence active prominence region Active Reconfiguring Message active region Active Repeater active RFID tag active satellite Active Server Pages active site active sludge active solar energy system active solar system active solid active sonar active sound attenuator active sound cancellation active sound control Active Streaming Format active substrate active Sun active system active termination active tracking system active transducer active transport active vibration suppression active volcano active voltage active window			Active Pulse Train Active Quality Recruitment Ltd Active Queue Management Active Rack Isolation System Active radar Active Radar Array Active Radar Array Antenna Active radar homing Active Radar Seeker Active radiator Active Radio Frequency Cavity Amplifier Active Radio Frequency Identification Active Radio Interferometer for Explosion Surveillance Active Range Clearance Active Range Of Motion Active Range Of Motion Active Range of Motion Exercise Active Ranging Sensor Active Rebuilders and Restorers active reciprocation active reciprocation active reciprocation active reciprocation active reciprocation Active Reconfiguring Message Active Reconfiguring Message Active Recreation for Children Active Reference Table active reformer active reformers active region Active Region Growth and Decay Active Region Monitor Active Region Transient Brightening Active Registry Monitor Active Release Techniques Active Reliable Multicast active remediation Active Remote Sensing of Clouds Active repeater Active Repeater Satellite active repressor Active Reproduction of Passive Positioning Active Request System Active Reservation Protocol active resistance exercise Active Resistance to the Roots of War active resistance training active resistance training active resistance training active resistance training active resistance training active resistive movement Active Resonator Oscillator Active Response Corps Active Response Geographic Information System Active Retaliation Corps Active Retention Active Retro-Directive Array

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