• Title/Summary/Keyword: kwangju

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Sasakian manifolds with cyclic-parallel ricci tensor

  • Lee, Sung-Baik;Kim, Nam-Gil;Han, Seung-Gook;Ahn, Seong-Soo
    • Bulletin of the Korean Mathematical Society
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    • v.33 no.2
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    • pp.243-251
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    • 1996
  • In a Sasakian manifold, a C-Bochner curvature tensor is constructed from the Bochner curvature tensor in a Kaehlefian manifold by the fibering of Boothby-wang[2]. Many subjects for vanishing C-Bocher curvature tensor with constant scalar curvature were studied in [3], [6], [7], [9], [10], [11] and so on.

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On generic submanifolds of a complex projective space

  • Seong Baek Lee;Seung Gook Han;Nam Gil Kim;Seong Soo Ahn
    • Communications of the Korean Mathematical Society
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    • v.11 no.3
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    • pp.743-756
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    • 1996
  • The purpose of this paper is to compute the covariant derivative of a shape operator of a generic submanifold of a complex space form without using the Green-Stoke's theorem. In particular, we classify complete generic submanifolds of a complex number space $C^m$ with parallel mean curvature vector satisfying a certain condition.

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Magnet Design using Topology Optimization

  • Jenam Kang;Park, Seungkyu;Semyung Wang
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.3B no.2
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    • pp.79-83
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    • 2003
  • The topology optimization for the magnet design is studied. The magnet design in the C-core actuator is investigated by using the derived topology optimization algorithm and finite element method. The design sensitivity equation for the topology optimization is derived using the adjoint variable method and the continuum approach.

The Present Situation of Aircraft Noise Damage and the Counterplan against Aircraft Noise in KWANGJU Airport (광주공항 주변의 항공기 소음피해 현황과 대책)

  • Song, B.H.
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.7 no.1
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    • pp.65-75
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    • 1999
  • Nowadays military aircraft noise significantly affect a number of people near military airport. This paper is mainly focused on a presentation of the proper counterplan against aircraft noise in KWANGJU airport, after research and analyze the present situation of aircraft noise damage and problems, including various civil appeal and Korean laws and policies, related to KWANGJU airport.

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