Absorption-re-emission filters were the first type developed, and so are commonly called simply " atomic line filters "; the other two types are usually referred to specifically as " Faraday filters " or " Voigt filters ".
32.
Atomic line filters are superior to conventional dielectric optical filters such as interference filters and Lyot filters, but their greater complexity makes them practical only in background-limited detection, where a weak signal is detected while suppressing a strong background.
33.
Etherloop uses half-duplex transmission, and as such, is less susceptible to interference caused by poor line quality, bridge taps, etc . Also, etherloop modems can train up through line filters ( although it is not recommended to do this ).
34.
Active atomic line filters are more likely to produce noise than passive ones because actives have no " state selectivity "; the pumping source may accidentally excite atoms hit by the wrong light up to the critical energy level, emitting radiation spontaneously.
35.
Atomic line filters can be considered the optical equivalent of lock-in amplifiers; they are used in scientific applications requiring the effective detection of a narrowband signal ( almost always laser light ) that would otherwise be obscured by broadband sources, such as daylight.
36.
As a device intended to pass signals in one direction only, the line filters offer nothing that couldn't be done ( with the same results ) by an inexpensive signal booster-a simple one-way RF amplifier already widely available cheaply and readily for other purposes.
37.
Atomic line filters are superior to conventional dielectric optical filters such as interference filters and Lyot filters, but their greater complexity makes them practical only in background-limited detection, where a weak signal is detected while suppressing a strong background . ( "'more . . . " ')
38.
A small amount of sarin nerve gas, the agent used by terrorists in a Tokyo subway attack last year, was found where it should not have been _ in the end-of-the-line filters that clean factory air before releasing it into the desert skies just southwest of Salt Lake City.
39.
Atomic line filters use different mechanisms and designs for different applications, but the same basic strategy is always employed : by taking advantage of the narrow lines of absorption or resonance in a metallic vapor, a specific frequency of light bypasses a series of filters that block all other light.
40.
It supports many features common in advanced text editors, such as syntax highlighting, regular expressions, configurable command line filter using the Through command bound to by default . [ http : / / ne . dsi . unimi . it / docs / More-Advanced-Features . html # More-Advanced-Features ne supports UTF-8 encoding and is 8-bit clean.
