• Proceedings of the KIEE Conference
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• 1994.07a
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• pp.539-541
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• 1994

The average current mode control of zero current switched series resonant converter is proposed. The conventional current controllers such as bang bang current controller and predictive current cantroller have some demerits like current offset and complexity. In this paper, the proposed current control technique are conventional current control techniques are comparatively studied. By the proposed control technique. the current cantroller can be simplely implemented without current offset.

• The Journal of Korean Obstetrics and Gynecology
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• v.24 no.3
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• pp.222-232
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• 2011

Objectives: The purpose of this study is to report the effect of oriental medicine on 2 patients with secondary amenorrhea. Methods: The patients who had secondary amenorrhea were treated by oriental medical treatments such as herbal medication(Gami-joukyung-tang, Gwibi-tanggagam-bang), acupuncture and moxibustion therapy. Results: After oriental medical treatments, the patients could have their periods again and their menstrual condition was improved. Conclusion: This case report shows that the oriental medical therapy is effective for treating secondary amenorrhea.

• Journal of Institute of Control, Robotics and Systems
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• v.15 no.7
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• pp.683-687
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• 2009

Track jump control is a random access strategy for short distance movement. The most common track jump scheme is a bang-bang control of a kick and brake manner. In a conventional track jump scheme, a track-following compensator is turned off during kick and brake periods, and restarted at a target track for track pull-in. The inevitable controller switching with non-zero initial condition results in undesirable transient response, and excessive overshoot in the transient response causes track pull-in failure. In this paper, a new track jump scheme is proposed for enhancing track jump stability. Instead of control switching, internal states of a track-following controller are artificially manipulated for kick and brake actions in a digital control environment. Experimental results are provided in comparison with conventional track jumps.

• Structural Engineering and Mechanics
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• v.50 no.6
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• pp.741-754
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• 2014

The conventional PHC pile-footing connection is the weak part because the surface area and stiffness are sharply changed. The Composite PHC pile reinforced with the transverse shear reinforcing bars and infilled-concrete, hereafter ICP pile, has been developed for improving the flexural and shear performance. This paper investigates the cyclic behavior and performance of the ICP pile-footing connection. To investigate the behavior of the connection, one PHC and two ICP specimens were manufactured and then a series of cyclic loading tests were performed. From the test results, it was found that the ICP pile-footing connection exhibited higher cyclic behavior and connection performance compared to the conventional PHC pile-footing connection in terms of ductility ratio, stiffness degradation and energy dissipation capacity.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2012.04a
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• pp.313-316
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• 2012

다수의 소방공무원이 화재나 고온 조건 등에 노출되어 화상을 입고 심리적 신체적 고통 받고 있다. 화상 관련 연구는 피부조직의 비선형성, 혈류에 의한 열전달 분석의 불확실성 등 신체 내부의 복잡한 물리현상으로 인하여 국내에서는 연구가 매우 미흡한 실정이다. 이에 따라 화상 예측에 대한 연구를 기반으로 화상을 방지할 수 있는 예방법이 필요하며, 화상 예측의 기초 연구로 피부조직의 형상 모델링 및 열물성치를 정확하게 파악하는 것이 매우 중요하다. 본 연구는 피부조직의 형상 및 열물성치와 관련된 기존 연구를 수집 및 정리하여 향후 화상 예측시 좋은 결과를 얻을 수 있도록 하는 데에 그 목적이 있다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.42 no.1
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• pp.39-41
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• 2017

In this letter, we propose a power control mechanism in order to improve secrecy rate defined as the difference between capacity of main link and wiretap link in a wireless multi-cell multiuser network. Through simulations, we verify that the proposed power control mechanism with threshold based user scheduling can significantly increase secrecy rate in a multi-cell environment.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.01a
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• pp.159-162
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• 2018

본 논문에서는 언리얼 엔진4에서 제공하는 강력한 라이팅 세팅들에 대해서 분석하고, 월드 라이트 매스의 옵션, 라이트매스 임포턴스 볼륨, 리플렉션 캡쳐 등을 사용해 효과적으로 사실적인 라이팅을 얻어내는 방법에 대하여 연구하였다. 월드 라이트 매스의 옵션들은 월드 전역의 간접광, 간접 그림자 등에 영향을 미치며, 라이트매스 임포턴스 볼륨, 리플렉션 캡처를 통해 라이팅의 중요도와 세밀한 반사를 정의함으로서 베이크 타임을 현저하게 감소시키고 사실적인 결과를 얻는데 연구 목적이 있다. 전역적인 라이팅 세팅이 세밀하고 사실적인 라이팅을 얻어내는데에 얼마나 효과적인지를 게임 구현을 통해 보여주었다.

• Journal of Physiology & Pathology in Korean Medicine
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• v.17 no.4
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• pp.879-892
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• 2003

This thesis makes a review of symptoms and cause of the numbness in the literature. clinical case are studied and classified according to the Hyungsang of the patients. The followings are the conclusions: In case of Dam type persons, numbness is mainly caused by Fire with blood deficiency and so cured by tonifying the Jung and blood. In case of Bang Kwang type persons. it is generally caused by the deficiency of Ki and damp-phlegm and treated by reinforcing Ki and removing dampness. Persons of Jung and Hyal types are apt to be afflicted with numbness of deficiency symptoms which can be cured by tonifying the Jung and blood. Those of Ki and Shin types are inclined to get numb from the congestion and stagnancy and so treated by promotion the flow of Ki, dispelling stagnancy, resolving phlegm and promoting digestion. Numbness is common to the old people and women. The deficiency of blood and primordial energy is a cause of old people's numbness. Women get numb due to the pent-up feelings and emotional disturbance. The function disharmony of five Jang and six Bu makes the body lose the control of heat and cold or deficiency and excessiveness, which can be a cause of numbness. Especially the deficiency of the spleen results in numbness. When the special parts of the body become numb treatment must be decided after due consideration on which of the Jang and Bu or meridians is related to that affected area. In case of person with six meridian types. unbalance of Ki and blood leads the six atmospheric influences(wind, cold, heat, dampness, dryness and fire) get into the body through the most developed meridian and brings in numbness.

• 한국약용작물학회:학술대회논문집
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• 2007.05a
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• pp.199-200
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• 2007

• Journal of Welding and Joining
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• v.30 no.6
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• pp.1-5
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• 2012