An important parameter in the design of gas absorbers is

Lecture 23 3/9/2016 Sleep and mood  Bidirectional relationships between sleep and mood o Mood is not great, sleep problems often follow o Sleep is not great, mood may be more irritable  one way to regulate mood is to get your sleep on track  quality versus quantity o sleep quality is very important  it was believes for a while that you are either sleep or awake o now know that sleep is a lot of physiological functions: different stages of sleep  stages of sleep o stage 1- barely below the threshold of consciousness:  brain is still very active (car horn can wake you up and you don’t realize you were asleep)  only a few minutes o stage 2- middle stage  Body and brain are both starting to slow down. o stage 3- delta sleep - deepest. Brain is almost completely dominated by delta waves  Combined stage 3 and 4 because they were more similar than different  Body does not want to wake up  Good for memory  Very important for the body to physically prepare itself o REM: rapid eye movement  Very shallow state of sleep  Brain is dreaming in this stage  Brain is as active as when you are fully awake  Body is naturally paralyzed  Stage 1-3 + REM = one cycle of cycle o 90 minutes o Get through multiple cycles in the night  Helps: to fall asleep, stay asleep o Stress o Medicines: can help or hinder o Light stack that may be good for sleep: crackers, bread, tea, anything that will make your relax  Hinders: o Caffeine: may be stuck in stage 1 o and stage 3 o Medicines o Sugar late at night is bad  You will sleep easiest if you go to sleep and wake up around the same time everyday  Look at tablet, phone, TV: body and brain don’t know how to process the light: o Brain interprets the light as sun o Books are very good  Don’t think about stressful thoughts as you’re about to fall asleep  How long should you lay awake in bed trying to fall asleep o More than 20 minutes: get out of bed and do something else  Sleep-hygene: getting sleep back on track and treating sleep disorders