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하경훈 한국일본근대학회 2007 일본근대학연구 Vol.0 No.15
助動詞「れる·られる」には4つの意味、つまり受身·可能·尊敬·自發の意味があるが、今までの硏究を見ると文に現れる助動詞「れる·られる」一つに對しては一つの意味しか賦與していない。そのため時には解釋において曖昧な場合が生じるケ―スが多いことも事實であり、そのような場合解釋が難しくなるため「曖昧」な表現として扱うのが常である。事實、助動詞「れる·られる」は4つの意味を有しているため「曖昧」な場合がないわけではない。本稿では「曖昧」とされる部分の中で、できるだけ「曖昧」ということばを使わず、意味を分類することを目標とする。たとえば、次のような會話が考えられる。先生:「そこには私も行けるかね。」 學生:「もちろんいらっしゃれます。」 この場合、「行く」の尊敬語として「いらっしゃる」が用いられ、それに續いて可能の意味を表わすため可能動詞が使われている。つまり尊敬語に可能形が接續した形となっている。次のような用例も考えられる。學生:「先生、今日の夕方ご都合はいかがですか。實は今日の夕方、ホテルでパ―ティ―が開かれますがいかがですか。」 先生:「そこは私も行ける所ですかね。」 學生:「もちろん先生さえ宜しければ行かれますとも。」 學生の會話文に見られる助動詞「れる」の用例に對して從來行われている意味解釋では可能として扱われるのが普通であるが、そうした場合果たして可能の意味だけでいいのであろうか。この會話文を見ると先生と學生の間に交わされている話は全體を通して學生が先生に對して尊敬語を用いていると考えられる。ところが可能だけの意味で解釋するとこの會話で「行かれます」の部分だけが尊敬語を用いないでいることになってしまう。なぜ可能を表わすときには尊敬の意味が消えてしまうのか。本稿ではその原因を探りながら從來の意味分類の問題點を示した後、いまだ觸れていない新しい助動詞「れる·られる」の意味分類を試みる。
하경훈(Kyoung-Hun Ha),조용선(Yong-Sun Cho),김덕구(Deog-Goo Kim),최효상(Hyo-Sang Choi) 대한전기학회 2011 전기학회논문지 Vol.60 No.5
The breaking capacity of circuit breakers could be no more increased in the electric power system. This is because the fault current increases due to continuous increases in electric power demand and facilities. To solve the problem, it is necessary to come up with an alternative. The superconducting fault current limiter (SFCL) has received an attention among various alternatives. The SFCL effectively reduce a fault current in cooperation with a power circuit breaker. A various types of the SFCL are suggested and a study on them have been progressed. As a result of it, the SFCL can be applyed to the electric power system in the near future. But, a study on recovery behaviors of the SFCL is not enough for applying to the electric power system. If the superconducting elements do not completely recover to the superconducting state after fault operation, it might be a breakdown of the superconducting elements due to heavy power burden and it gives an bad influence on the working of other electric devices. Additionally, the distribution power system has reclosing operation such as open-0.3sec-closed/open-3min-closed/open procedure. So we need to study more about improvement of the recovery behaviors of the SFCL. In this paper, we analyzed the recovery behaviors of a flux-coupling type SFCL according to reclosing operation when a single line-to-ground fault occurred and we compared recovery behaviors of the SFCL with and without a neutral line between secondary reactors and superconducting elements. Also, the flux-coupling type SFCL has advantageous for increases of capacity by controlling the variation in turn ratios between two reactors. Consequently, when the number of turns of the secondary reactors increased, the power burden of the superconducting elements was bigger due to the increase of impedances of the secondary reactors. To distribute the power burden, two superconducting elements connected in series and the balanced quenching of the superconducting elements was induced by connecting a neutral line.
자속결합형 초전도 한류기의 2차측 턴수 증가에 따른 회복특성
하경훈(Kyoung-Hun Ha),최효상(Hyo-Sang Choi),박형민(Hyoung-Min Park),조용선(Yong-Sun Cho),정병익(Byoung-Ik Jung),최수근(Soo-Geun Choi),오금곤(Geum-Gun Oh),김덕구(Duk-Gu Kim) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
국내의 배전계통에서 전력수요의 증가에 따른 수요설비 증설로 인해 사고시 고장전류가 증가하게 되었다. 하지만 차단용량 초과에 따른 차단기 및 보호기기의 교체시 경제적 비용 상승과 기술적 문제가 따른다. 따라서 영저항 특성을 이용한 초전도한류기를 설치하는 방안이 검토되고 있다. 초전도 한류기는 정상상태에서는 영저항으로써 손실이 발생되지 않고, 사고시에는 초전도 소자가 ?치되어 발생된 저항으로 사고 전류를 제한한다. 본 실험에서는 자속결합형 초전도 한류기를 구성하여 2차측 권선 턴수비 변화에 따른 사고전류 제한 후 초전도 상태로의 회복 특성을 살펴보았다. 턴수비가 증가함에 따라 2차측 임피던스의 증가로 인해 사고전류 제한이 커짐을 확인 할 수 있었지만 소자의 부담은 증가함으로써 초전도 상태로의 회복시간이 길어졌다.
3상 자속결합형 초전도 한류기의 1선지락 사고시 전압증가 및 재폐로 동작에 따른 특성 분석
하경훈(Kyoung-Hun Ha),최효상(Hyo-Sang Choi),박형민(Hyoung-Min Park),조용선(Yong-Sun Cho),정병익(Byoung-Ik Jung),최수근(Soo-Geun Choi),오금곤(Geum-Gun Oh),김덕구(Duk-Gu Kim),고성필(Sung-pil Ko) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.9월
The electric pewer demand has increased. As a result, we need to change a circuit breaker for bigger capacity one but it has sorre problems. In order to solve the difficulties according to change a circuit breaker, some alternative plans are suggested. One of them is to apply a SFCL in the electric pewer system The SFCL has the ability to reduce a fault current with an existing circuit breaker and it can protect an electric pewer system. In this paper, we composed a three phase flux-coupling type SFCL and analyzed a recovery characteristic according to reclosing operation with an increase in voltage. If the recovery time is delayed than we are expected, it could be a loss in the normal state. So we have to improve a recovery characteristic for application of SFCL to electric pewer svstem.
김종수,신중호,하경훈 대한기계학회 1997 大韓機械學會論文集B Vol.21 No.6
Kinetodynamics of a cam driving slider mechanism consists of kinematic analysis and force analysis. The kinematic analysis is to determine the kinematic characteristics of a cam driving mechanism and a slider mechanism. The force analysis is to determine the joint forces of links, the contact forces of the cam and follower, and the driving torque of a main shaft. This paper proposes a close loop method and a tangent substitution method to formulate the raltionships of kinematic chanis and to calculate the displacement, velocity and acceleration of the cam driving slider mechanism. Also, an geometric relationships of the cam and the roller follower. For dynamic analysis, the contact force and the driving torque of the cam driving slider mechanism are calculated from the reauired sliding forces, sliding motion and weight of the slider.
한규필,김용석,하경훈,하영호 대한전자공학회 1995 전자공학회논문지-B Vol.b32 No.12
A hybrid approach which includes edge- and region-based methods is considered. The modified non-linear Laplacian(MNL) filter is used for feature extraction. The matching algorithm has three steps which are edge, signed region, and residual region matching. At first, the edge points are matched using the sign and direction of edges. Then, the disparity is propagated from edge to inside region. A variable window is used to consider the local method which give accurate matched points and area-based method which can obtain full-resolution disparity map. In addition, a new relaxation algorithm for considering matching possibility derived from normalized error and regional continuity constraint is proposed to reduce the mismatched points. By the result of simulation for various images, this algorithm is insensitive to noise and gives full- resolution disparity map.
신중호,김종수,하경훈,Shin, Joong-Ho,Kim, Jong-Soo,Ha, Kyong-Hoon 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.6
Kinetodynamics of a cam driving slider mechanism consists of kinematic analysis and force analysis. The kinematic analysis is to determine the kinematic characteristics of a cam driving mechanism and a slider mechanism. The force analysis is to determine the joint forces of links, the contact forces of the cam and follower, and the driving torque of a main shaft. This paper proposes a close loop method and a tangent substitution method to formulate the relationships of kinematic chains and to calculate the displacement, velocity and acceleration of the cam driving slider mechanism. Also, and instant velocity center method is proposed to determine the cam shape from the geometric relationships of the cam and the roller follower. For dynamic analysis, the contact force and the driving torque of the cam driving slider mechanism are calculated from the required sliding forces, sliding motion and weight of the slider.