Sieverts and milliSieverts are used now. They replaced the old rem and millirem. There is a factor 100 difference, so 1 Sievert = 100 Rem. The current limit for nuclear industry employees is 20 milliSv/year, though the actual average level in the US is about 2.4 milliSv.
The Rem used to be used in Health Physics to measure radiation dose, it is an acronym for Rontgen Equivalent Man.(The methodology allows for the different effects of different types of radiation). The unit now used is the Sievert (Sv), 1 Sievert = 100 Rem. This is a large unit, so millisieverts are used for practical personnel radiation measures, so 1 millisievert = 100 millirem. Recommended radiation levels for nuclear workers are set by the ICRP (International Committee for Radiation Protection). These used to be set at 5 Rem/year (50 milliSv) but now the level is 20 milliSv/year ie 2 Rem/year. The use of Rem and millirem has been discontinued in the nuclear industry in favour of Sieverts and millisieverts. However as someone with nuclear experience going back to 1958 I find it difficult to think in Sieverts. For example I know that 500 Rem will kill roughly 1/2 the people exposed to it within a month, now I have to change that to 5 Sieverts. Fortunately that level of exposure has only happened once (at Chernobyl).
There are 4 non-REM stages and REM sleep.
Radiation levels are measured now in millisieverts(mSv), formerly they were in Rem. The relation is 1 Rem = 10 millisieverts. Typical background levels for North America are 3 mSv/year, but there will be variations from place to place, depending on the type of underlying rocks and whether radon is present (radon is a radioactive gas produced by radium decay). The average extra dose received by nuclear plant workers (in the US) is 2.4 mSv/year. I doubt if any extra radiation to the general public can be attributed to nuclear plants in normal operation. See link given below
500
REM rebound involves the tendency for REM sleep to increase following REM sleep deprivation.
There are 4 syllables. Rem-in-is-cing.
The plural form of rem is rem.Ex: I have a lifetime dose of 3 rem.
1001001010101 2346 ÷ 2 = 1173 Rem. 0 1173 ÷ 2 = 586 Rem. 1 586 ÷ 2 = 293 Rem. 0 293 ÷ 2 = 146 Rem. 1 146 ÷ 2 = 73 Rem. 0 73 ÷ 2 = 36 Rem. 1 36 ÷ 2 = 18 Rem. 0 18 ÷ 2 = 9 Rem. 0 9 ÷ 2 = 4 Rem. 1 4 ÷ 2 = 2 Rem. 0 2 ÷ 2 = 1 Rem. 0 1 ÷ 2 = 0 Rem. 1
Rem Lebedev's birth name is Rem Fedorovich Lebedev.
Rem Krassilnikov was born in 1927.
REM is during stage 3 and 4 where most of the dreaming occurs.