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The skills themselves are alluded to in St. Augustine's Confessions: Latin: ...legere et scribere et numerare discitur 'learning to read, and write, and do arithmetic'. [3]
3R or three Rs may refer to: The three Rs , the basic elements of a primary school curriculum: reading, 'riting (writing), and 'rithmetic (arithmetic) The three Rs, the waste management hierarchy : reduce, reuse, and recycle
Below is a list of NEMA enclosure types; these types are further defined in NEMA 250- Enclosures for Electrical Equipment. Each type specifies characteristics of an enclosure, but not, for example, a specific enclosure size.
A common misconception of the 3Rs is that they refer only to replacement; [3] however, their scope is much broader. Moreover, while the 3Rs were designed for research on laboratory animal models, their implementation has been encouraged also in farmed animals [4] [5] and wildlife conservation research.
However, good approximations can be made for gases in many states using simpler methods outlined below. For many solids composed of relatively heavy atoms (atomic number > iron), at non-cryogenic temperatures, the heat capacity at room temperature approaches 3R = 24.94 joules per kelvin per mole of atoms (Dulong–Petit law, R is the gas constant).
MDSS – measured depth referenced to mean sea level zero datum – "subsea" level; MDT – modular formation dynamic tester, a tool used to get formation pressure in the hole (not borehole pressure which the PWD does). MDT could be run on Wireline or on the Drill Pipe; MDR – mud damage removal (acid bullheading) MEA – monoethanolamine
The now-deprecated NEMA 10-30 has a neutral pin (at top of photo), but does not have a dedicated safety grounding pin. NEMA 10 connectors are a now deprecated type that had formerly been popular in the United States for use with high-power electric clothes dryers, kitchen ranges, and other high-power equipment. NEMA 14-30R and -50R connectors ...
Many systems will offer 2.5 Gbit/s transponders, which will normally mean the transponder is able to perform 3R regeneration on OC-3/12/48 signals, and possibly gigabit Ethernet, and reporting on signal health by monitoring SONET/SDH section layer overhead bytes. Many transponders will be able to perform full multi-rate 3R in both directions.