Neck Muscle Responses to Stimulation of Monkey Superior
... following text) was delivered on 80 –90% of all trials between 500 and
1,000 ms after the onset of fixation. Stimulation was delivered either
while the FP remained visible (fixation trials; 40 – 45% of all trials) or
200 ms after the FP was extinguished (fixation-blink trials, 40 – 45%
of all trials ...
Shift plan
The shift plan or rota is the central component of a shift schedule in shift work. The schedule includes considerations of shift overlap, shift change times and alignment with the clock, vacation, training, shift differentials, holidays, etc. The shift plan determines the sequence of work (W) and free (F) days within a shift system. A notation used often identifies day (D), swing (S) and night (N) shifts for the W days and O (off) for rest days. W work days D day shift, 1st shift This shift often occurs from 07:00 to 15:00 for eight-hour shifts, and from 06:00 to 18:00 for twelve-hour shifts. S swing shift, 2nd shift This shift often occurs from 15:00 to 23:00 for eight-hour shifts, and is not used with twelve-hour shifts. N night shift, 3rd shift, graveyard shift This shift often occurs from 23:00 to 07:00 for eight-hour shifts, and from 18:00 to 06:00 for twelve-hour shifts. F free days O days off This is defined as a day on which a shift does not begin.Note that a worker transitioning from N to O works for the first six or seven hours of the first day ""off"". Thus, when days off follow night shifts, the first one or more days ""off"" are, in fact, days of recovery from lack of nighttime sleep.Note also that this daily notation refers to the start of a shift. If a shift starts at 23:00, then this is a W day even though only one hour is worked. The day after this shift is an F day if no shift starts on this day, though many hours have been worked from midnight on.One shift system may allow many shift plans. For example, the twelve-hour, 2nW:2nF system with n = 1 allows twelve different plans in three serially-identical sets. Within a set, DONO has the same sequence as NODO. DNOO is the preferred sequence because days off follow night work and there are two consecutive days off.