The power SNR of an imaging system is 4 dB. The dominating noise in this system is white noise with average power of 4 mW. Calculate the average power of the signal.

10.0 mW

Explanation:

By definition, the SNR of any system is expressed as follows:

where

S = average power of the signal

N= average noise power

In this case this relationship can be written as follows, repalcing by the givens:

Rearranging terms, and taking log₁₀ on both sides, we have:

⇒ Pavg = 10 mW

sleep paralysis is a parasomnia, events associated with sleep.

sleep paralysis happens when you are in the middle of waking up or falling asleep. it is the feeling of being conscious but unable to move. it definitely involves hallucinations.

i had a friend that had sleep paralysis and he told me a story one time where he was laying in bed and he couldn't move his body no matter how hard he tried and there was someone standing in the corner of his room coming towards him. he couldn't move and you can't "wake up" because you are already conscious. sometimes sleep paralysis can be triggered by frequent waking up during the night based off of multiple trips to the bathroom, or if you had ever been abused, sleep paralysis can start happening from things like that.