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Cloud Nine is the name Buckminster Fuller gave to his proposed airborne habitats created from giant geodesic spheres, which might be made to levitate by slightly heating the air inside above the ambient temperature. A Cloud Nine could be tethered, or free-floating, or maneuverable so that it could migrate in response to climatic and environmental conditions, such as providing emergency shelters.

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  • Cloud Nine (sphere) (en)
  • クラウド・ナイン (浮遊都市) (ja)
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  • クラウドナイン (Cloud nine) は、バックミンスター・フラーが名付けた浮遊都市である。巨大な球体（ジオデシック構造）の中の暖められた空気によって、構造体は浮遊する。構造は表面の応力分散の機構から巨大になる程、つまり球体が大きくなる程、容積＞質量で増える為、より強くなる仕組みとなっている。 バックミンスター・フラーは球体の大きさが1マイル以上であれば、その質量は無視できるとした。そうすると球体内部の空気の温度が1度上がれば浮遊できるという。彼はこの風船のように浮遊出来る事を計算によって確かめ、何千人もの人口を住まわせる事ができる都市を作る事ができると言う。 クラウドナインは気候の変化によって大きく左右される限界もある。 (ja)
  • Cloud Nine is the name Buckminster Fuller gave to his proposed airborne habitats created from giant geodesic spheres, which might be made to levitate by slightly heating the air inside above the ambient temperature. A Cloud Nine could be tethered, or free-floating, or maneuverable so that it could migrate in response to climatic and environmental conditions, such as providing emergency shelters. (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Project_for_Floating_Cloud_Structures_(Cloud_Nine).jpg
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  • Cloud Nine is the name Buckminster Fuller gave to his proposed airborne habitats created from giant geodesic spheres, which might be made to levitate by slightly heating the air inside above the ambient temperature. Geodesic spheres (structures of triangular components arranged to make a sphere) become stronger as they become bigger, because of how they distribute stress over their surfaces. As a sphere gets bigger, the volume it encloses grows much faster than the mass of the enclosing structure itself. Fuller suggested that the mass of a mile-wide geodesic sphere would be negligible compared to the mass of the air trapped within it. He suggested that if the air inside such a sphere were heated even by one degree higher than the ambient temperature of its surroundings, the sphere could become airborne. He calculated that such a balloon could lift a considerable mass, and hence that 'mini-cities' or airborne towns of thousands of people could be built in this way. A Cloud Nine could be tethered, or free-floating, or maneuverable so that it could migrate in response to climatic and environmental conditions, such as providing emergency shelters. (en)
  • クラウドナイン (Cloud nine) は、バックミンスター・フラーが名付けた浮遊都市である。巨大な球体（ジオデシック構造）の中の暖められた空気によって、構造体は浮遊する。構造は表面の応力分散の機構から巨大になる程、つまり球体が大きくなる程、容積＞質量で増える為、より強くなる仕組みとなっている。 バックミンスター・フラーは球体の大きさが1マイル以上であれば、その質量は無視できるとした。そうすると球体内部の空気の温度が1度上がれば浮遊できるという。彼はこの風船のように浮遊出来る事を計算によって確かめ、何千人もの人口を住まわせる事ができる都市を作る事ができると言う。 クラウドナインは気候の変化によって大きく左右される限界もある。 (ja)
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