• The Zoological Society Korea : Newsletter
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• v.13 no.1
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• pp.15-18
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• 1996

• The Zoological Society Korea : Newsletter
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• v.16 no.2
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• pp.21-25
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• 1999

• 전기의세계
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• v.54 no.9
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• pp.29-36
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• 2005

• Proceedings of the Zoological Society Korea Conference
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• 1999.10b
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• pp.118.2-118
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• 1999

• Proceedings of the Zoological Society Korea Conference
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• 1999.10b
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• pp.136.1-136
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• 1999

• Proceedings of the Zoological Society Korea Conference
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• 2001.04a
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• pp.21-23
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• 2001

• Proceedings of the Zoological Society Korea Conference
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• 2001.04a
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• pp.44.1-44
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• 2001

• Proceedings of the Zoological Society Korea Conference
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• 1999.10b
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• pp.116.1-116
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• 1999

• Journal of the Korean Society of Propulsion Engineers
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• v.22 no.4
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• pp.1-11
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• 2018

A system design and integrated design process for a space launch vehicle were established based on system engineering. With the mission design results for a given payload weight and trajectory, it is possible to perform optimal design by integrating each unit such as propulsion, weight estimation, and aerodynamic force after analysis, during in the system design process. The program is finally configured to verify that the designed vehicle can perform its mission through 3-DOF trajectory optimization simulation. Genetic algorithms are used as the optimization method, and the optimal design results of the variables and parameters to be considered during design are presented.

• 한국노년학
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• v.41 no.4
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• pp.469-490
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• 2021

This study examined the effect of family cohesion and perception of age-friendly environment on sense of community and the mediating role of perception of age-integration in those relationships by regions. To that end, we used survey data collected from a nation-wide survey from adults who are aged 20 to 85 (N=1,200). ANOVA, structural equation models and bootstrapping mediation tests were conducted. The results showed that family cohesion and one sub-dimension of the age-friendly environment- social participation- increased sense of community in all three regions. Also, perception of age-integration partially mediated the relationship between family cohesion and sense of community in the Metropolitan areas and small cities as well as the relationship between social participation and sense of community in all three regions. Based on the results, authors discussed ways to increase family cohesion and social participation to enhance sense of community.