The approach,
called tunable infrared laser direct absorption spectroscopy, detects the ratio of methane isotopes, which can provide a «fingerprint» to differentiate between two common origins: microbial, in which microorganisms, typically living in wetlands or the guts of animals, produce methane as a metabolic byproduct; or thermogenic, in which organic matter, buried deep within the Earth, decays to methane at high temperatures.
This so -
called tunable random laser, the authors conclude, may one day find application as a source in active displays and temperature - sensitive screens or as a remote temperature - sensing device.
Not exact matches
This controllable reflectivity and interference is similar, he adds, to so -
called «whispering gallery» confinement modes that have been used in optical and acoustic systems — but these have not been
tunable or adjustable.
And all four are
tunable — you can set certain apps or contacts to be allowed to interrupt you, just in case you want to ensure that a babysitter's, spouse's, or assistant's
calls always get your attention.
The larger unit has a longer name — it's
called the «WiZ Quest 6.38 - inch White Colors and
Tunable White Wi - Fi Connected Smart LED Projector» if you get it from Home Depot.