Considerations of human's long stay in closed systems.
Conditions for long stay of human in closed systems with material circulation, such as space stations and lunar bases, are discussed compared with the current human's life style on earth in the light of human cultural  history.  Impact on the life-style in the closed ecological system lies on meals and hygiene systems.  A key to resolve problems in a new life-style in a closed system lies on mental aspects relating to a new life culture.  Necessary items to be developed are shown in order to realize comfortable life in the closed system.
Ashida
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Institute for Environmental Sciences, Obuchi, Japan.
D003468:Cultural Evolution; D018504:Ecological Systems, Closed; D004779:Environment Design; D005247:Feeding Behavior; D006801:Humans; D006920:Hygiene; D008021:Life Support Systems; D008603:Mental Health; D013026:Space Flight