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이재도,박준호,전대성,윤영우,김상곤,Lee, Jae-Do,Park, Jun-Ho,Jeon, Dae-Seong,Yun, Yeong-U,Kim, Sang-Gon 한국정보처리학회 2000 정보처리논문지 Vol.7 No.5
For the object-based video compression at very low bit rate, vieo segmentation is an essential part. In this paper, we propose a temporal video segmentation algorithms for motion pictures which is based on blocks. The algorithm is composed of three steps: (1) the change-detection, (2) the block merging, and (3) the block segmentation. The first step separates the change-detected region from background. Here, a new method for removing the uncovered region without motion estimation is presented. The second step, which is further divided into three substeps, estimates motions for the change-detected region and merges blocks with similar motions. The merging conditions for each substep as criteria are also given. The final step, the block segmentation, segments the boundary block that is excluded from the second step on a pixel basis. After describing our algorithm in detail, several experimental results along the processing order are shown step by step. The results demonstrate that the proposed algorithm removes the uncovered region effectively and produced objects that are segmented well.
Simulink를 이용한 공간전압벡터 PWM 인버터 모델링 및 시뮬레이션
이재도(Lee. Jae Do),황재호(Hwang. Jae Ho),이학주(Lee.Hak Ju),김영록(Kim.Young Nok),이기홍(Lee.Ki Hong),성세진(Seong. Se Jin) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
본 논문에서는 유도전동기 속도 및 토크 제어시 고조파의 왜형률을 감소시키고, 다지털 구현이 용이하며 선형제어 영역을 증가시킬 수 있는 스위칭 방식으로 Space voltage Vector PWM(Pulse Width Modulation) 설명하였으며, 시뮬레이션하기 위한 user_tool로써 Matiabl Simulink 를 이용하여 SVPWM 을 구현하는 방법을 성명하였다. 결과적으로 개루프 운전 시 유도기에 인가되는 기준전압을 각각 비과변조와 과변조 시 전압비율 변경방식을 사용하여 나타나는 응답으로 가상스위칭 시간 T1,T2,T0 와 속도, 상전류, 토크응답을 알아보았다.
이재도 ( Jae-do Lee ),박명환 ( Myeong-hwan Park ) 한국고등직업교육학회 2009 한국고등직업교육학회논문집 Vol.10 No.1
This research targeted 940 students of the D-College as of 2008 to analyze individuals’ confidence in the selection of their major, question of career decision making as of the present, and obstacles for the career decision making by different variables. College students’ confidence on the selection of their major manifested significant difference depending on the gender, experience of whether they took additional year to take the College entrance exam again, question of career decision making and type of major. As for the verification on the level of confidence in career decision making, difference exists depending on the gender, question of career decision making, grade, age, hometown and type of major. When the College students’ confidence on the selection of their major increases, level of non-decision on their career decreases, and when the total level of obstacles for career decision makings high, perception of the non-decision on their career increases as well. Among the sub variables of the obstacles for career decision making, factors such as ‘lack of self assurance’, ‘sense of physical inferiority’, ‘difficulty in interpersonal relations’, ‘relationship with other important people’, ‘lack of information on occupation’ and ‘lack of interest’ affect non-decision on the career. Among the variables that influence, obstacles for career decision making that correspond to the ‘lack of self assurance’ is the highest in terms of influence, followed by the ‘lack of interest’ and ‘lack of information on occupation’.