• NEWSLETTER 전기공업
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• no.98-14 s.207
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• pp.26-42
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• 1998

• NEWSLETTER 전기공업
• /
• no.99-5 s.222
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• pp.18-49
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• 1999

• NEWSLETTER 전기공업
• /
• no.98-15 s.208
• /
• pp.14-27
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• 1998

• 전기산업
• /
• v.7 no.2
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• pp.110-113
• /
• 1996

• 발명특허
• /
• v.14 no.2 s.156
• /
• pp.32-33
• /
• 1989

• 발명특허
• /
• v.13 no.1 s.143
• /
• pp.38-39
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• 1988

일본 부일전기㈜는 전기기계 기구 제조 판매업체로서 자본금 3백21억4천만엔에 종업원 1만3천여명의 대기업. 특허부는 기술개발추진센터 산하 기술개발통괄부와 함께 위치해 있다. 특허부의 편성 및 인원은 관리그룹$\cdot$제1과$\cdot$제2과(삼중분실) 제3과(송본분실)$\cdot$제4과(동경분실)로 31명의 전담요원이 배치되어 있다.

• Convergence Security Journal
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• v.14 no.3_1
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• pp.55-63
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• 2014

The history of mankind has been at war with the war now going on in this moment. To prepare for this war, war history has been studied and its importance can be summarized in three main points. First, to understand the predictions of war and, second, to develop doctrines to fit changing circumstances, and to hone tactics through indirect war experiences. The curriculum of war history education for noncommissioned officer's department(two-year program) must include war lessons and skills to prepare the war. By indirect experiences through training they will have the ability to perform their duties in the field. This paper focuses to review the contents and methods of war history education which is being taught and to propose the new model for war history education for the students who are commissioned as officers after graduation.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.2235_2236
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• 2009

본 논문에서는 초음파 센서를 이용하여 3차원 마우스 시스템을 설계하였다. 마우스에 부착시킨 초음파 발신부와 모니터에 부착시킨 초음파 수신부를 이용하여 마우스와 모니터에 부착된 수신부사이의 거리를 측정한다. 측정한 거리는 무선네트워크를 이용하여 Host PC에 전송하고, Host PC는 측정거리와 위치 추정 알고리즘을 이용하여 마우스의 위치를 추정한다. 최소자승법을 이용하여 위치 추정 알고리즘의 모의실험을 수행하였으며, 모의실험 결과로부터 최소자승법을 3차원 마우스 시스템의 위치추정 알고리즘으로 활용할 수 있음을 확인하였다.

• The Transactions of the Korean Institute of Electrical Engineers D
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• v.49 no.10
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• pp.563-571
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• 2000

In this paper, a nonlinear adaptive control method for an EMS(Electro-Magnetic Suspension) system with mass uncertainty is proposed. Using the coordinate transformation and feedback linearizing control, EMS system has been transformed into the form of parametric strict-feedback system with unknown virtual control coefficients. With this transformed system, tuning functions approach, which is an advanced from of adaptive backstepping, has been applied in order to stabilize the system against mass uncertainty. Computer simulation is also carried out in order to compare the performance of the proposed controller with that of feedback linerizing controller.

• Journal of the Korean Electrochemical Society
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• v.16 no.4
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• pp.198-203
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• 2013

Copolymer consisted of MMA and tBMA was synthesized by radical polymerization and poly(MMA-co-MA) was prepared by selective hydrolysis of tert-butyl group. The obtained polymer was coupled with epoxy functionalized PEO of various molecular weight to synthesize poly(MMA-co-PEGMA) with different side chain length. The AC-impedance measurement shows $1.88{\times}10^{-6}Scm^{-1}$ of room temperature ionic conductivity from 48mol% of MMA while $5.11{\times}10^{-8}Scm^{-1}$ was observed in 82mol% sample. In addition, there was an effect of PEGMA molecular weight on ionic conductivity possibly due to the steric hindrance in grafting-onto coupling reaction. Finally, the polymer electrolytes shows electrochemical stability up to 6V at room temperature.