In our previous studies, we investigated the friction that acts on a rigid body during a fall before colliding with a floor. In the next step, we want to know how normal force behaves during a fall. As is well known, the maximum static friction depends on the normal force. Therefore, it is important to know the behavior of the normal force for the purpose of researching how friction acts on a rigid rod. After this study is completed, we will investigate what conditions give rise to sliding or floating in a fall.

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In order to investigate the behavior of suspended particle matter (SPM) in a 1/6 gravity (1/6 G) environment, simulated lunar regolith was diffused in a chamber, realizing a quasi 1/6 gravity environment by parabolic flight. The effect of the 1/6 G environment on the atmospheric suspension was evaluated by means of the cutoff value of an elutriator; the cutoff value in the 1/6 G should be √<6> times larger than at the earth's surface. The results of our experiment confirmed that the falling velocity of SPM in a 1/6G approximates Stokes' law, and the falling time is inversely proportional to the force of gravity. Numerical computation suggested that residual SPM in a convection-free room becomes high in a low-gravity environment or in a high-ceilinged room. These results suggest that once lunar dust intruded into a lunar base, it would take a considerably long time to clean up. Since the suspension time of SPM is different according to the particle size, the exposure risk of SPM will also vary according to the particle size. Considering that the risk depends only on the drifting time, the actual influence of low gravity on fine particles (D_p &le; 1.0 mm in diameter) and on large particles (D_p > 10 mm) in a 1/6G would be negligible. In contrast, for medium sized particles (2.5 < D_p &le; 10 mm) the difference in the drifting time between that on the earth and on the lunar surface is much larger than can be confirmed with the senses. Safety precautions used for this size of particle on the earth should be altered on the lunar surface.

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The purpose of this study is to examine the relationship of reflection and emotional intelligence of psychiatric nurses. Subjects of this study were 91 nurses of the psychiatric hospital of Japan. 61 participants responded to this survey. The contents of the questionnaire was the subject of characteristics and Japanese version of Wong and Law Emotional Intelligence Scale. In addition, question items about the psychiatry nurse's reflection had been added "I have done reflection on nursing practice" and "I have done reflection in nursing practice". These were asked to rate on 7-point Likert-type scale. A result of the investigation, There was a significant positive correlation between emotional intelligence and reflection (r =0.46, P <0.01). That is, those who had high emotional intelligence also had high reflection on nursing practice. Additionally, the strongest positive correlation was between "Reflection on nursing practice" and "Other's emotional appraisal" (r =0.44, P <0.01). Particularly, the reflective nurses had a high ability to evaluate the emotion of self other. Future outlook from the results of this study is to clarify the details of the involvement of nurses from others, and is the development of evaluation method of reflection of psychiatric nurses.

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The illuminance and color temperature of a light source affect the perceived impression of interior lighting. People generally prefer a low color temperature (i.e., warm colors) in interior spaces with low illuminance, and a high color temperature, (i.e., cool colors) in interior spaces with high illuminance. This phenomenon is expressed by the Kruithof curve, which describes the relation between the illuminance and color temperature of a light source. However, there are issues with the Kruithof curve. Therefore, the aim of this study was to clarify the influence of elapsed time on the subjective evaluation of interior lighting. Two different scale models were used in this study. The Semantic Differential (SD) method was used to evaluate the impressions of the subjects. Five pairs of words (comfortable/uncomfortable, warm/cool, preferred/unfavorable, natural color appearance/artificial color appearance, and calming/restless) were employed in this study. Each subject is assumed the activity of relaxing in the living room and evaluates orally in this experiment. The results show the perception of comfort with regard to the interior space tended to increase with elapsed time.

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