급성 심근경색증에 동반된 승모판 폐쇄부전증의 임상적 특징

정상만,조영일,조화상,유광하,송기호,인행환 건국대학교 의과학연구소 1997 건국의과학학술지 Vol.- No.7

자기구성 퍼지제어에 의한 8축 로봇의 강인제어

신행봉,김종수,김홍래,한성현 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

In this paper, it is presented a new technique to the design and real-time implementation of fuzzy control system based-on digital signal processors in order to improve the precision and robustness for system of industrial robot. Fuzzy control has emerged as one of the most active and fruitful areas for research in the applications of fuzzy set theory, especially in the real of industrial processes. In this thesis, a self-organizing fuzzy controller for the industrial robot manipulator with a actuator located at the base is studied. A fuzzy logic composed of linguistic conditional statements is employed by defining the relations of input-output variable of the controller, In the synthesis of a FLC, one of the most difficult problems is the determination of linguistic control rules from the human operators. To overcome this difficult, SOFC is proposed for a hierarchical control structure consisting of basic level and high level that modify control rules. The proposed SOFC scheme is simple in structure, fast in computation, and suitable for implementation of real-time control. Performance of the SOFC is illustrated by simulation and experimental results for robot with eight joints.

여름 캠프활동에 관한 연구 : 서울여대 부속유치원 여름 캠프활동을 중심으로

민행난;최윤선;최인경;민혜원;임양선;이윤희;이상희 서울여자대학교 1998 아동연구 Vol.3 No.-

[초록없음]

초음파 센서 및 음성인식 기반 자율주행로봇의 지능제어에 관한 연구

한성현,김윤구,Le Xuan Thu,신행봉,조창제 한국공작기계학회 2006 한국공작기계학회 추계학술대회논문집 Vol.2006 No.-

In this paper, it is presented a new approach to the design of intelligent control system of a autonomous robot with two drive wheel. The proposed control scheme uses a Gaussian function as a unit function in the fuzzy neural network, and back propagation algorithm to train the fuzzy neural network controller in the framework of the specialized learning architecture. It is proposed a learning controller consisting of two neural network-fuzzy based on independent reasoning and a connection net with fixed weights to simply the neural networks-fuzzy. The performance of the proposed controller is shown by performing the computer simulation for trajectory tracking of the speed and azimuth of a mobile robot driven by two independent wheels.

스카라 로봇의 속도제어를 위한 지능제어 알고리즘 개발

한성현,신행봉,Le Xuan Thu,안종국 한국공작기계학회 2006 한국공작기계학회 추계학술대회논문집 Vol.2006 No.-

We propose a new technique to the development of Intelligent control algorithm based-on digital signal processors in order to improve the precision and robustness for system of industrial robot. Intelligent control has emerged as one of the most active and fruitful areas for research in the applications of fuzzy set theory, especially in the real of industrial processes. In this thesis, a self-organizing fuzzy controller for the industrial robot manipulator with a actuator located at the base is studied. A fuzzy logic composed of linguistic conditional statements is employed by defining the relations of input-output variable of the controller, In the synthesis, one of the most difficult problems is the determination of linguistic control rules from the human operators. To overcome this difficult, SOFC is proposed for a hierarchical control structure consisting of basic level and high level that modify control rules. The proposed scheme is simple in structure, fast in computation, and suitable for implementation of real-time control. Performance is illustrated by simulation and experimental results for SCARA robot.

자동교시기능을 갖는 로봇의 3차원 오프라인 시뮬레이터 개발

신행봉,정동연,한성현 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-

We propose a unmaned integrating control system based-on Windows XP version Off-Line Programming System which can simulate a Robot model in 3D Graphics space in this paper. The industrial robot with 4 and 6 axes modeled SM5 and AMI respectively were adopted as an objective model. Forward kinematics, inverse kinematics and robot dynamics modeling were included in the developed off-line program. The interface between users and the off-line programming system in the Windows XP's graphic user interface environment was also studied. The developing language is Microsoft Visual C++. Graphic libraries, OpenGL, by silicon Graphics, Inc. were utilized for 3D Graphics.

정신과 입원환자의 공격행동에 대한 연구

이귀행,김상원 大韓神經精神醫學會 1992 신경정신의학 Vol.31 No.2

This study was performed to evaluate the episodic aggressive behaviors of psychiatric patients who had admitted at Wonkwang University hospital from March 20. 1990 to March 19. 1991. The staffs assessed these episodic aggressive behaviors by Yudofsky's Overt Aggression Scale treanslated into korean. The results were estimated acceding to demographic aspects and diagnostic criterias. During the period of this research, for about 1 year. episodic aggressive behaviors occured in 211(22.5%) patients of the 938 admitted patients and in 745(1.2%) cases of the 64021 inpatients. 49.8% of total aggressive behaviors appeared within one month after admission. 37% from 12 to 18 o'clock during a day, 76.8% in patients with enduring illness more than 25 months. Means of postadmission day of aggressive behaviors for manic episodes. paranoid schizophrenics, personality disorder, and nonparanoid schizophrenics were 18.64, 58, 38, 87.61 and 109.51 days, respectively. Patients of coerced admission, in close ward. readmission. or history of violence before admission made more frequent aggressive behaviors than patients of voluntary admission. in open ward. first admission or no history of violence before admission. In order of frequency, aggressive behaviors occured in corridor, own room, nursing room and were discovered by other patients, nurse, attendant and doctor. Although most aggressive behaviors appeared in schizophrenia, the patients with schizoalfective disorder, manic episode and organic mental disorder were more aggressive than the patients with schizophrenia, alcohol abuse and dependency according to ratio of frequency of aggressive behavior to the number of patients. In major diagnostic categories, the patients with manic episodes was more aggressive than the patient with nonparanoid schizophrenia or personality disorder, and the patients with schizophrenics paranoid type was more aggressive than the patient with nonparanoid type according to total aggression score.

핸드오프로 인한 TCP 재전송 타이머의 타임아웃 방지 방안

이상연,임행빈,정충교 강원대학교 정보통신연구소 1999 정보통신논문지 Vol.3 No.-

It will be occurred unacceptably long pause and intermittent disconnection states due to handoffs under the mobile computing environment. The current TCP interprets these handoffs as network congestion and excutes the congestion avoidance algorithms which degrade TCP performance. To prevent degrading TCP troughtput due to the unnecessary timeout problem of source retransmitter timer caused by handoffs, we propose EHN(explicit handoff notification) message algorithm which resets the value of retansmission timer. By adapting EHN, the TCP source can maintain the pre-handoff' congestion window size after handoffs and prevent the abrupt decrease of congestion window size caused by timeout. Therefore, this scheme improves the TCP performance more than the current TCP implementations during handoffs. With the computer simulation, we compare our EHN scheme with the current TCP scheme and fast retransmission scheme and prove the validation of EHN.

오프라인 프로그래밍을 이용한 스카라 로봇의 비쥬얼 피드백 제어

신행봉,이우송,이현철,한성현 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-

The equipment of industrial robot in manufacturing and assembly lines has rapidly increased. In order to achieve high productivity and flexibility, it becomes very important to develop the visual feedback control system with Off-Line Programming System(OLPS). We can save much efforts and time in adjusting robots to newly defined workcells by using OLPS. A proposed visual calibration scheme is based on position-based visual feedback. The calibration program firstly generates predicted images of objects in an assumed end-effector position. The process to generate predicted images consists of projection to screen-coordinates, visible range test, and construction of simple silhouette figures. Then, camera images acquired are compared with predicted ones for updating position and orientation data. Computation of error is very simple because the scheme is based on perspective projection, which can be also expanded to experimental results. Computation time can be extremely reduced because the proposed method does not require the precise calculation of tree-dimensional object data and image Jacobian.

불임여성에서 스트레스 지각, 대처방식, 우울 및 불안

조행신,정상근,류철희,황익근 大韓神經精神醫學會 1998 신경정신의학 Vol.37 No.3

목 적 : 불임여성에서 불임에 의한 스트레스 때문에 심리적 후유증이 발생할 수 있다. 이러한 심리적 영향을 평가하여 정신과적 중재의 필요성을 파악하고자 하였다. 방 법 : 환자군은 전북대학병원 산부인과 불임클리닉에 내원한 불임으로 확직된 34명을 대상으로 하였다. 대조군은 환자군과 연령 및 학력수준이 대등한 1명 이상의 자녀를 둔 34명의 건강한 기혼여성으로 선정하였다. 양군모두 인구통계학적 특성 및 불임관련사항에 관한 반구조화된 설문지, 스트레스 지각검사, 대처방식 체크 리스트, Beck Depression Inventory, Hamilton Anxiety Scale, Hamilton Rating Scale for Depression, SCL-90-R 그리고 상태-특성불안 검사를 이용하여 평가하였다. 결 과 : 불임여성은 대조군에 비해 다음과 같은 결과를 보였다. 1) 스트레스 지각검사 중 금전적인 문제에 스트레스를 더 많이 지각하고 있었으며 (p=0.026), 최근 1년간의 부정적 사건 및 중성적 사건의 빈도가 유의하게 더 높았다.(p〈0.05). 2) 스트레스 대처방식중 정서완화적 대처가 주가되는 소극적 대처의 빈도가 유의하게 높았다(p〈0.05). 3) Hamilton 우울척도수준, Hamilton 불안척도수준 그리고 특성불안수준이 유의하게 더 높았다(p〈0.05). 4) Beck 우울수준, SCL-90-R의 우울수준 그리고 상태-특성 불안수준이 높을수록 일주일간의 스트레스 지각점수가 더 높았으며(p〈0.05), Beck 우울수준, Hamilton 불안수준 그리고 상태-특성 불안 수준이 높을수록 소극적 대처의 빈도가 더 높았다(p〈0.05). 결 론 : 상기 결과로 미루어 불임여성들이 소극적 대처방식과 높은 수준의 우울, 불안을 보이는 바, 이에 대한 정신과적 중재가 필요할 것으로 생각한다. Objective : The purpose of this study was to investigate psychological impacts of infertility related stress in Korean infertile women. Methods : Both the 34 infertile women group and the control group(34 married women) were evaluated by using Semistructured Questionnaire, Stress Perception Scale, Coping Behavior checklist, Beck Depression Inventory(BDI), Hamilton Anxiety Scale(HAS), Hamilton Rating Scale for Depression(HRSD), SCL-90-R and State Trait Anxiety Inventory(STAT). Results : Perceived financial stress of negative and neutral life events and frequency of passive coping(especially, emotion-focused coping) were significantly higher in infertile women than control group. In infertile women, totally perceived stress was positively correlated with BDI, SCL-90-R(depression) and STAI. Passive coping behavior was positively correlated with EDI, HAS and STAI. Conclusion : Above results suggest that infertile women would have a tendency to passive coping and high level of depression and anxiety, and should be considered for psychiatric intervention.