• Proceedings of the PSK Conference
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• 2001.10a
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• pp.208.2-208.2
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• 2001

• 대한방사선방어학회:학술대회논문집
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• 2010.04a
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• pp.54-55
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• 2010

• Transactions of the Korean Society of Mechanical Engineers A
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• v.23 no.11 s.170
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• pp.2007-2013
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• 1999

A Newly proposed control methodology applied to the aeroelastic system experiencing flutter is investigated and its performance is verified experimentally. The flexible cantilever beam slicked with piezofilm sensor and piezoceramic actuator is modelled in physical domain. Dynamic moment equation for the system is derived via Ito's stochastic differential equation and F-P-K equation. Also system's characteristics in stochastic domain is analyzed simultaneously. LQG controller is designed and used in physical and stochastic domain. It is shown experimentally that the vibration of beam is controlled effectively by designed LQG controller in physical domain. By comparing the result with that of LQG controller designed in stochastic domain, it is shown that the new control method, called Heo-stochastic control technique, has better performance as a controller.

• Biomolecules & Therapeutics
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• v.11 no.3
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• pp.196-199
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• 2003

The methanol extracts from 60 plant extracts were prepared and evaluated for their antioxidative activity. Arctium lappa, Diospyros kaki, Eugenia caryophyllata, Melia azedarach and Forsythia suspensa showed the inhibitory activity against lipid peroxidation. Caesalpinia sappan, Crataegus pinnatifida, Eugenia caryophyllata, Gleditsia japonica, Osmunda japonica, Rhus javanica and Sanguisorba officinalis showed the highest inhibitory activity against DPPH radical formation. In particular, Eugenia caryophyllata demonstrated strong inhibitory activity on the lipid peroxidation and free radicals. The results suggested that selected plant extracts have a potential as natural antioxidant.

• (The)Study of the Eastern Classic
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• no.54
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• pp.213-233
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• 2014

The present study examines Bangsanjib(舫山集, Collected Works of Bangsan) written by Heo Hun (許薰, pen name: Bangsan), a scholar of the late Joseon Dynasty. Chapter 2 reviews the author's life and his academic orientations against the backdrop of his times. Chapter 3 goes on to select some of his essays and analyze their contents and characteristics. In Chapter 2, Bangsan is portrayed as a hermit scholar who devoted his entire life to his scholarly achievements. Although he tried to develop his academic theories based on both the Geungi and Yeongnam Schools of Neo-Confucianism, the scholar was more inclined to the Geungi School. Chapter 3 analyzes Bangsan's essays in Classical Chinese with a focus on two themes: The first is the author's loyalty to the academic tradition of the Geungi School, which is demonstrated by his positivistic and pragmatic approach to philosophical issues. The second is his awareness of self-reliant national defense as is revealed by his assertion that Joseon should have knowledge, and provide education, on new weapons in order to be better equipped with such military equipment and become a powerful nation.

• Defense and Technology
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• no.3 s.145
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• pp.34-43
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• 1991

유럽의 몇몇 방위산업체들은 매각될 위기에 놓여있다. 전자계통의 방위산업체들도 다른 분야보다는 좋은 여건이지만, 방위장비 생산을 갑작스럽게 감축시키며, 업자들을 곤란에 처하게 한 "평화진전(peace progress)"에 적응하기에는 도저히 힘들 것으로 보인다. 그러나 기업경영을 계속할 것을 원하는 방위산업체에게 선택의 여지는 주어져있다. 이러한 업체들은 충격을 완화하고, 그들의 시장 지배력을 넓히기 위해 기업 합병이나 합작투자, 또는 다른 공동경영 형태를 기대할수 있으며, 새로운 시장을 기대할 수도 있을 것이다. 극동지역은 방산장비의 판매가 계속 될 것이며, 심지어는 증가하게 될지도 모르는 유일한 지역이다

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2002.11a
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• pp.141-141
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• 2002

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2002.11a
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• pp.136-136
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• 2002

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2003.06a
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• pp.167-167
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• 2003

• Proceedings of the KIEE Conference
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• 2003.11b
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• pp.19-22
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• 2003

This paper proposes an algorithm for navigation of an autonomous mobile robot with vision sensor. For obstacle avoidance, we used a curvature trajectory method. Using this method, translational and rotational speeds are controlled independently and the mobile robot traces a smooth curvature trajectory that consists of circle trajectories to a target point. While trying to avoid obstacles, the robot fan be goal-directed using curvature trajectory.