• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.2109-2109
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• 2011

High power microwave sources operating in relativistic regions, high current reletivistic electron beams are obtained by using cold cathodes with the help of explosive emission. For these relativistic devices, the pulsed power and magnetic field systems are very large and heavy. The phase velocity of electromagnetic mode should be showed down close to the beam velocity, ensuring enough beam coupling with electromagnetic modes. By using the annular electron beam, a weakly relativistic oversized bwo consisting of rectangularly corrugated cylindrical waveguide is demonstrated.

• Proceedings of the Korean Society of Plant Biotechnology Conference
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• 2005.04a
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• pp.135-135
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• 2005

• Journal of Korean Society of Environmental Engineers
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• v.30 no.1
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• pp.106-110
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• 2008

본 글은 자동차부품혁신센터 및 신소재기술지원센터에 다년 근무한 경험을 토대로 지구 온난화 현상과 연계된 차량 에너지 기술에 관련하여 서술한 기술자료이다. 주된 내용으로는 현재 범 세계적으로 이슈화되고 있는 환경문제인 지구 온난화 현상(global warming)을 현상(facts), 가설(myths) 및 해결책(answers)의 3개 측면으로 분류하여 이를 차량 에너지 기술과 연계하여 서술함으로써 지구 온난화 문제에 대한 해결책을 제시하고자 한다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2010.06a
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• pp.287-287
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• 2010

In the study in which magnetic flux was conserved by the flux conserving ring, it was found that the field configuration produced by providing radio field was unstable, and the reserved field configuration was not because the instability could not be controlled not be controlled when MHD instability of plasma become high.

• Proceedings of the Korean Society of Crop Science Conference
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• 2006.04a
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• pp.672-673
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• 2006

• Proceedings of the Korean Society of Crop Science Conference
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• 2006.04a
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• pp.252-253
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• 2006

• Proceedings of the Korean Society of Crop Science Conference
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• 2006.04a
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• pp.674-675
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• 2006

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.05b
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• pp.169-173
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• 2003

In this paper, we present a design and experiment study of high power large diameter backward wave oscillator. Analysis is made within the scope of linear theory of absolute instibility. The Electron beam generator may be atteractive source of high power millimeter microwaves which has simpler structure.

• Korean Journal of Veterinary Research
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• v.19 no.2
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• pp.159-160
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• 1979

Pityriasis rosea in a 2-month old pig is described. Lesions were confined to the abdomen and groin. They consisted of raised, erythematous papules with distinct borders. Microscopic examination of the lesions revealed a nonspecific dermatitis with acanthosis, moderate infiltration of mononuclear cells and eosinophils in the upper dermis. The known occurrence of the disease will help differentiate the condition from other dermatoses.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2008.06a
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• pp.523-524
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• 2008

전자빔의 산란에 의한 자기 공명현상과 지파 사이크로트론과의 상호작용에 의한 해석에서 체렌코프 발진이 일어나는 것은 확인하기 위하여 대구경 후진파 발진기를 이용한 실험을 하였다. 전자계와 전자빌의 상호작용을 위한 조절을 위하여 도파관의 반경과 진폭, 파장을 조절하였으며 이에 따른 주파수의 발진을 알수 있었다.