• Journal of the Korean Society of Propulsion Engineers
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• v.15 no.3
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• pp.64-69
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• 2011

The spherical flange was designed to apply to a cryogenic high pressure pipe of a liquid rocket engine. It is designed that the spherical flange is able to be assembled and kept airtight up to $2.5^{\circ}$ of the axial misalignment between the combined components. It increases the degree of freedom of the engine assembly. The spherical flange is composed of a ball and socket joint, a metal seal, spherical type bolts and washers. The prototype was verified by leak test at the room temperature and the cryogenic temperature. Additionally the strength test and the destructive test were performed at the room temperature.

• The Journal of the Korea Contents Association
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• v.10 no.11
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• pp.113-124
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• 2010

This article studies on the character design of North Korea's puppet animation around 1985. At that time North Korea's puppet animation are improved glaringly in quantitative side and qualitative side of modeling. There has been constant support nationalistically to puppet animation from the initial period of animation production in North Korea unlike South Korea, and North Korea communicated lively with European socialist countries where tradition of puppet animation is strong. We can discover structural and figurative change of distinct feature in character design in 1985. Structurally, experimental forms and correct movement of joint were possible, because they used ball and socket armature. Expressively, they established own esthetics of character design in puppet animation applying technique of korean traditional painting to character design: laconism, perspicuity, delicacy.