http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
임승철,김광한,Lim, Seung-Chul,Kim, Kwang-Han 한국시뮬레이션학회 2011 한국시뮬레이션학회 논문지 Vol.20 No.1
본 논문은 다양한 지면에 적응 가능한 견형 4족 로봇의 위치 이동에 관한 것으로 정 보행과 동 보행의 구현 방법 및 특성을 주로 다루었다. 이를 위하여, 총 12 자유도의 로봇을 자체 제작하였으며, 몸통과 발의 운동궤적을 생체 모방 방식으로 생성한 후 역기구학에 의하여 그에 해당하는 각 다리의 관절각을 해석적으로 구하였다. 이러한 관절각 데이터를 상기 로봇의 ADAMS 모델에 적용하여 컴퓨터 시뮬레이션을 수행한 결과, 계획된 걷기 및 속보 걸음새가 동력학적으로 안정함을 확인하였다. 그러나 그 이전의 속보 패턴의 경우에는 시뮬레이션 결과와는 달리 실험 중 불안정한 거동을 보였다. 그에 따라 원인 분석을 하는 과정 중, 속보와 같은 동 보행의 경우 ZMP보다는 WSM의 개념을 적극적으로 활용하고 보행 주기를 최대한 단축시키는 것이 안정성 확보에 매우 중요함을 발견하였다. This paper is concerned with locomotion of dog-like quadruped robots that can adapt to various terrains, mainly dealing with implementation methods and characteristics of static and dynamic gaits. To this end, a 12-DOF robot is built in house, motional trajectories of its body and feet are generated mimicking biological life, and the corresponding leg joint angles are analytically obtained by inverse kinematics. Such joint angle data are then applied to the robot's ADAMS model for computer simulations so that the planned walk and trot gaits are both confirmed dynamically stable. However, contrary to the simulation results, previous trot patterns showed unstable behavior during experiments. This problem led us to analyze the reason, and in the course we discovered the importance of maximally utilizing the concept of WSM rather than ZMP and therefore reducing the gait period to secure the stability of dynamic gaits such as trot.
초등학교 고학년의 공정성에 대한 믿음이 또래괴롭힘 방어행동에 미치는 영향과 학급분위기의 조절효과
임승철(Seung-chul Lim),박주희(Ju Hee Park) 한국아동학회 2020 아동학회지 Vol.41 No.2
Objectives: The purpose of the current study was to examine the influences of beliefs in a just world and classroom climate on defending behavior and investigate whether classroom climate moderated the relations between beliefs in a just world and defending behavior. Methods: The participants were 194 children, 4<SUP>th</SUP> to 6<SUP>th</SUP> graders from 11 elementary schools. The data were analyzed by means of descriptive statistics, Pearson’s correlation coefficients, and a hierarchical multiple regression. The moderating effects were explored using Johnson-Neyman technique. Results: The outcomes of this study indicated that both belief in a just world for others and classroom climate had positive effects on defending behavior. The higher the level of belief in a just world for others, and the less likely to permit bullying the classroom, the more likely to show defending behavior the students. However, belief in a just world for self had no significant effect on depending behavior. In addition, classroom climate moderated the relation between belief in a just world for self and defending behavior; the effect of belief in a just world for self on defending behavior was greater when the level of classroom climate accepting bullying was low, compared to when it was high. Conclusion: The result suggested that it could be an effective way to help students develop the belief that the world they live in is fair toward themselves and others. Also, it would be necessary to create classroom climates in which bullying is intolerable to encourage students’ defending behavior.
임승철(Lim, Seung-Chul),채정재(Chae, Jeong-Jae),박상민(Park, Sang-Min),윤은규(Yun, Eun-Gyu) 한국소음진동공학회 2002 한국소음진동공학회 논문집 Vol.12 No.5
This paper concerns the design and application of an electro-rheological (ER) fluid damper to semiactive vibration control of rotor systems. In particular, the system under present study is constructed structurally flexible in order to explore multiple critical speeds within operation range. To this end, the dynamic models of the proposed ER damper and its associated amplifier are derived in the first place. Subsequently entire rotor system model is assembled along with the dynamics of the end effector based on a finite element method enabling prediction as to its free and forced vibration characteristics. Next, an artificial intelligent (AI) feedback controller is synthesized taking into account the peculiarity of Coulomb damping effect in rotor applications. Finally, computational and experimental results are presented including model validation and control performances. In practice, such an AI control proved effective whether the spin speed was either before or after critical speeds.
임승철 ( Seung Chul Lim ),문여정 ( Yeo Jung Moon ),김상운 ( Sang Wun Kim ),윤보성 ( Bo Sung Yoon ),남은지 ( Eun Ji Nahm ),김재훈 ( Jae Hoon Kim ),김영태 ( Young Tae Kim ),김재욱 ( Jae Wook Kim ),김성훈 ( Sung Hoon Kim ) 대한산부인과학회 2006 Obstetrics & Gynecology Science Vol.49 No.9
Objective: This study is to determine serum carbohydrate antigen (CA) 19-9 levels in ovarian mature cystic teratoma (MCT) as a possible differential diagnostic tool. Methods: The study group was composed of 201 patients who underwent removal of ovarian MCT and pathologically confirmed at Yonsei University Medical Center from January 2001 to July 2005. All of them were tested for serum CA19-9 levels before operation. Their data was compared with routine gynecologic evaluation group who showed normal serum CA19-9 level. Statistical analysis was carried out with t-test and Pearson correlation by SPSS version 12.0. Results: Serum CA19-9 level was significantly elevated in the patients with ovarian MCT (p=0.011). Serum CA19-9 level and size of MCT showed positive correlation (p=0.009). Moreover, postoperative serum CA19-9 level showed significant decrease, compared to preoperative level (p=0.007). Conclusion: Serum CA19-9 can be used as an effective method for differential diagnosis of ovarian MCT, and it is proper to be used as a postoperative follow-up test.
중증 전자간증 태반 내 Junctional Protein에 대한 Ginsenoside Rk1의 효과
임승철 ( Seung Chul Lim ),맹용선 ( Yong Sun Maeng ),권자영 ( Ja Young Kwon ),강명화 ( Myoung Hwa Kang ),황정혜 ( Jeong Hye Hyang ),김영한 ( Young Han Kim ),권영근 ( Young Keun Kwon ),박용원 ( Yong Won Park ) 대한산부인과학회 2009 Obstetrics & Gynecology Science Vol.52 No.3
Objective: To investigate the differential expression of junctional proteins in the normal and preeclamptic human placenta and the effect of ginsenoside Rk1 in junctional proteins. Methods: Placental tissues from 10 women with severe preeclampsia and 5 normal women were collected at the time of their cesarean section. Five of 10 preeclamptic women were complicated with intrauterine growth restriction (IUGR). Immunohistochemistry and Western blotting was employed to localize junctional proteins (zo-1, occludin and plakoglobin) positive cells. The placental explant culture was performed to investigate if Rk1 can attenuate the expression of junctional proteins (zo-1, occluding and plakoglobin) induced by deferoxamine-induced hypoxia. Rk1 was treated at the day 3 and Western blot analysis was performed for protein quantification. Results: There was no different expression of zo-1 and plakoglobin among all the study groups. Occludin showed negative at the endothelial cells of the terminal villi in both normal and preeclampsia groups. At the endothelial cells of the stem villi, occludin was detected in both normal and severe preeclamptic placenta with normal fetal growth. However, severe preeclampsia with IUGR were decreased expression of occludin at the endothelial cells of the stem villi. When we administered Rk1 to the placenta treated with DFO, expression of occluding was not different. Conclusion: The placental expression of zo-1 and plakoglobin were not different among the study groups, while that of occludin was significantly decreased at the endothelium of stem villi in severe preeclampsia with IUGR. Rk-1 showed no effect on the placental junctional proteins. These results suggest that occludin may play a role in pathophysiology of fetal growth restriction in utero.
임승철 ( Seung Chul Lim ),박용원 ( Yong Won Park ),최현정 ( Hyun Jung Choi ),김영한 ( Young Han Kim ) 대한산부인과학회 2006 Obstetrics & Gynecology Science Vol.49 No.8
Objective: To evaluate the clinical course of the Fitz-Hugh-Curtis syndrome (FHCS). Methods: 33 patients who were diagnosed with FHCS were included in this study. Statistical analysis was carried out by t-test, Pearson correlation and Chi-square test using SPSS version 12.0. Results: Our data showed a significant correlation between the C-reactive protein (CRP) and the degree of the elevation of liver enzymes (p=0.017, p=0.0046). 24 patients were infected with Chlamydia trachomatis (77.4%). All patients except one showed subcapsular enhancement of the liver in computed tomography. Presences of tubo-ovarian abscess in the sonographic finding were more significantly correlated with elevation of CRP than computed tomographic findings (p=0.015). Discussion: This study suggests that the patients who had right upper quadrant pain should be carefully evaluated to rule out gynecologic diseases. CRP is an important marker of progression and clinical course in FHCS.
지능 로봇 비젼을 위한 모멘트 기반 영상 사형 정보 예측
강환일(Hwan-Il Kang),임승철(Seung-Chul Lim),황원영(Won-Young Hwang),신대진(Daejeen Shin) 한국지능시스템학회 2004 한국지능시스템학회 학술발표 논문집 Vol.14 No.1
본 논문에서는 기하학적 모멘트를 이용한 영상의 기하학적인 정보 예측 방법을 제안한다. 기준 패턴의 기하학적인 모멘트와 감지 패턴의 기하학적인 모멘트를 이용하여 감지 영상의 선형이동, 회전, 확대 및 축소를 예측할 수 있다. 또한 XRS 정규화를 통하여 사형 변환된 패턴의 정보를 감지할 수 있다. 실험을 통하여 제안된 방법의 유용성을 보인다.
지능 로봇 비젼을 위한 영상정규화를 이용한 영상 사형 정보 예측
강환일(Hwan Il Kang),임승철(Seung Chul Lim),이종혁(Chong Hyuk Lee),최연훈(Yeon Hoon Choi) 한국지능시스템학회 2004 한국지능시스템학회 학술발표 논문집 Vol.14 No.2
본 논문에서는 XYS영상 정규화와 XSR 영상 정규화에 기반을 둔 영상사형정보예측 방법을 제안한다. 실험을 통하여 XYS영상 정규화와 XRS 영상 정규화에 기반을 둔 영상사형정보예측 방법을 보이고 XYS 방식의 의한 사형정보예측방법이 더 우수함을 보인다. 또한 플리핑 및 회전과 수평 수직 비 정보를 원래영상과 감지된 영상의 중앙모멘트로 표시될 수 있음을 보인다.