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In certain classes of systematic names, there are a few other exceptions to the rule of using Greek-derived numerical prefixes. The IUPAC nomenclature of organic chemistry , for example, uses the numerical prefixes derived from Greek, except for the prefix for 9 (as mentioned) and the prefixes from 1 to 4 (meth-, eth-, prop-, and but-), which ...
U.S. Marines on a recon mission during a field training exercise in 2003. In military operations, military reconnaissance or scouting is the exploration of an area by military forces to obtain information about enemy forces, the terrain, and civil activities in the area of operations.
Five classes a year train about 50 students each in a grueling three week class. For the first two weeks, class begins at 4:00 a.m. with a five-mile run, physical training, breakfast and classes. In the final week, the day begins with a helicopter jump, with assessment of patrolling practically nonstop until students arrive back at the school.
The P-3-AEWs are used by U.S. Customs and Border Protection's Air and Marine Operations for drug interdiction and homeland security missions. "P-3-LRT" (Long Range Tracker), previously known as "Slicks", also operated by CBP, are modified P-3 aircraft with an optical sensor turret in the nose and tracking radar which often work with the AEW ships.
The variability of R Coronae Borealis was discovered by English astronomer Edward Pigott in 1795. [13] In 1935 it was the first star shown to have a different chemical composition to the Sun via spectral analysis. [17] R Coronae Borealis is the prototype of the R Coronae Borealis class of variable stars.
12 (twelve) is the natural number following 11 and preceding 13.. Twelve is the 3rd superior highly composite number, [1] the 3rd colossally abundant number, [2] the 5th highly composite number, and is divisible by the numbers from 1 to 4, and 6, a large number of divisors comparatively.
From about 2004 to 2011, [4] [5] U.S. military planners used various "Tier systems" to designate the various elements in an overall plan for integrated operations. [6] The Tiers do not refer to specific models of aircraft, but rather roles the aircraft would fill. The U.S. Air Force, U.S. Marine Corps, and U.S. Army each have their own tier system.
every 4 hours quaque quarta hora q.6.h., q6h every 6 hours quaque sexta hora q.8.h., q8h every 8 hours quaque octava hora q.a.m., qAM, qam every morning: quaque ante meridiem q.d., qd every day / daily quaque die q.h.s., qhs every night at bedtime quaque hora somni q.d.s, qds, QDS 4 times a day quater die sumendum q.i.d, qid 4 times a day