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포화구동기를 갖는 선형 시스템의 H$\infty$ 추종 제어기 설계
이연규,김명순,김진훈,Yi Yearn-Gui,Kim Myoung-Soon,Kim Jin-Hoon 대한전기학회 2005 전기학회논문지 D Vol.54 No.4
In this paper, we consider the H$\infty$ tracking control of linear system with a limited actuator capacity. The considered reference is a general time-varying one with bounded magnitude and rate. By adopting a similarity transform and a new sto variable, we convert the original system equation to new one which has a tracking error as a part of the new state variable. First, we obtain a result on the low-gained H$\infty$ tracking control which never permits the actuator saturation. Next, we give a result on scheduled H$\infty$ tracking control which uses the actuator capacity more effectively. All results are in the form of linear matrix inequalities(LMI) which can be easily checked their feasibility. Finally, we give a numerical example to show the validity and usefulness of our results.
중세 장원에서의 경제외적 강제와 농업 자본주의의 등장 : Surplus Extraction by Ban Lordship in Continent 대륙에서의 공권에 의한 잉여수탈
이연규 慶星大學校 1997 論文集 Vol.18 No.2
In the phase of agricultural expansion, the relationship of rent between the lords and the peasants tended to stabilize or diminish rent, because the peasants were directed to their subsistence. Therefore, lords were forced to have the extra-economic coercion over the persons of peasants. The extra-economic coercion had two different forms, one by the domestic lordship, the other by ban lordship. The interest of ban lord or territorial lord laid in the wealth and number of peasant households which were the basis of taxation. Thus he gave pressure to lessen the burden of rent, intruding himself between manorial lords and peasants. And lords competed between themselves to increase the number of peasants whom each controlled, and thus the extraction of ban lords from peasants tended to diminish. Furthermore, the increase of royal authority also tended to limit the extraction. In sum, the extra-economic coercion by the ban lordship took the role of supporting the increase of population in the early Middle Ages. On the contrary, in the phase of agricultural contraction of the late Middle Ages, it added the difficulties which peasants had faced. It is true that various dues and taxes were fixed at certain amount, but peasants had to get into debts in order to acquire enormous sums of money at the price of it and were burdened annually with the fixed dues and taxes. Moreover the increase of taxation of state, frequent warfare, and intermittent plagues struck additional blows to peasant economy. All this had the effect of decreasing population. However the decline of population could not revive the balance between population and resources, because it diminished the income of state and lords seriously, made them demand more from peasant, and thus kept population from returning to the previous level.
이연규,김정원 한국영유아교원교육학회 2016 유아교육학논집 Vol.20 No.6
Many factors that may affect teaching aptitude of pre-service early childhood teachers have been discovered. However, little is known about the relationship between personality and teaching aptitude. This study investigated personality in relation to teaching aptitude in pre-service early childhood teachers. Pre-service early childhood teachers’ personality scale and teaching aptitude scale assessed the personality and teaching aptitude of 373 pre-service early childhood teachers in D-city, Korea. Results showed that five dimensions of personality (social-relation, positive self-concept, performance of teaching, creativity and personality, philanthropy) were significantly related to teaching aptitude, indicating that pre-service teachers with better personality were likely to have greater teaching aptitude. Regression analysis indicated that personality in the areas of social-relation and positive self-concept significantly predicted teaching aptitude of pre-service early childhood teachers. 본 연구의 목적은 예비유아교사의 인성과 교직적성의 전반적 경향을 밝히고 예비유아교사의 인성이 교직적성에 미치는 영향을 파악하는 것이다. 본 연구를 위하여 D광역시에 소재한 2개 대학의 유아교사 양성학과 1-3학년 학생 373명을 대상으로 인성과 교직적성 관련 설문조사를 실시하였다. 연구결과 예비유아교사의 인성은 사회관계와 직무수행 관련 인성의 수준이 가장 높은 것으로 나타났고, 긍정적 자아개념, 인간애, 창의인성과 관련된 인성의 순으로 높게 나타났다. 교직적성은 직업소명, 친화력, 수용성과 민감성, 대인관계와 관련된 교직적성의 순으로 높게 나타났으며, 창의성과 자기개발, 안전관리와 관련된 교직적성의 수준이 상대적으로 낮게 나타났다. 예비교사의 인성과 교직적성은 긍정적인 상관관계가 있는 것으로 나타나 예비유아교사가 보다 높은 수준의 인성을 갖추고 있을수록 보다 적절한 교직적성을 가지고 있는 것으로 밝혀졌다. 특히 예비유아교사의 사회관계와 긍정적 자아개념, 직무수행, 창의인성과 인간애와 관련된 인성이 교직적성에 많은 영향을 미치는 것으로 밝혀졌다.