Free field

The means for setting up electromagnetic fields of precisely determined intensity at microwave frequencies in unbounded regions of space. Such standards are used to evaluate ...

free field stress

Mining; General mining; Mineral mining

The stresses existing in rock before the excavation of any mine opening. In general, these stresses are known to be influenced primarily by the weight of the overlying 1284 ...

free field microphone

Science; Acoustics

At frequencies above 1 kHz the wavelength of sound is small enough for a half-inch microphone to 'disturb' or affect the sound field you are trying to measure. Free field ...

field

Professional careers; Sales

Anywhere out of the sales office, field sales people or managers are those who travel around meeting people personally in the course of managing their sales territory, to be ...

Fukushima Daiichi nuclear disaster

Natural environment; Earthquake

The Fukushima Daiichi nuclear disaster is a series of equipment failures, nuclear meltdowns, and releases of radioactive materials at the Fukushima I Nuclear Power Plant, ...

2012 Indian Ocean earthquake

Natural environment; Earthquake

On 11 April 2012 an undersea earthquake struck near the Indonesian province of Aceh measuring at a magnitude of 8.6. There were initial fears that it would cause a subsequent ...

P wave

Natural environment; Earthquake

A seismic wave that involves particle motion in the direction of propagation.

Rayleigh wave

Natural environment; Earthquake

A seismic surface wave involving elliptical motion in a vertical plane oriented in the direction of propagation of the wave.

Richter scale

Natural environment; Earthquake

A scale ranging from 1 to 10 used to show the size of an earthquake.

Ring of Fire

Natural environment; Earthquake

The area around the pacific basin where a lot of seismic activity occurs, including the western coast of north and south america and east asian islands like japan.

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Industry/Domain: Astrology Category: General astrology

Supermoon

Supermoon is a term coined in 1979 by astrologer Richard Nolle to describe a New or Full Moon occurring at or near perigee (the closest point in the ...