IRCT20171002036498N3 IRCT 2019-10-03 Rafsanjan University of Medical Sciences The effect of localized magnetic field with a very low frequency of sleep induction during the rest of the nurses' Work night The effect of localized magnetic field with a very low frequency of sleep induction during the rest of the nurses' Work night 2019-04-21 anticipated 32 Complete https://irct.ir/trial/32195 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Crossover, Purpose: Other, Randomization description: samples are selected based on the availability. Before intervention, the device is turned off and without any waves is on head. After intervention, the device is placed on the samples head with waves propagation, Blinding description: The samples are unaware of whether or not they receive radiation. N/A Relation between Magnetic fields and inductance on sleep at rest in night shift nurses. In the post intervention phase for four weeks and during eight nights, radiation with a frequency of 200 micro Tesla and less than 20 Hz is given before nurses rest after the night shift. In the pre-intervention phase for four weeks, during the eight nights, the device was placed on the head of samples without any wave propagation.. No - There is not a plan to make this available Justification or reason for not sharing IPD is After data analysis will be decided