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The purpose of this study is to create a method for evaluating the quality of sleep depending on the elastic property of the bed mattress by measuring physiological and psychological responses while sleeping. We executed POMS (Profile of Mood States) before and after sleep, and investigated the change in subjects' moods according to sleep. We prepared bed mattresses that have different elasticity...
Various approaches have been utilized in the overall study of facial expressions. And while the results of such research have been reported, little is known about the actual mechanism of how facial expressions are formed. Ishida et al. studied the facial expression of drowsiness. In their study, they discovered that contraction of the frontal is muscle raises the eyebrows when a person is sleepy....
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