Pierre Robin syndrome 환아에서 기관내 삽관 경험 : 증례보고

김상훈,이현영,소금영,유병식,정이남 朝鮮大學校 附設 醫學硏究所 2009 The Medical Journal of Chosun University Vol.33 No.S

Pierre Robin syndrome is characterized by micrognathia, glossoptosis, and cleft palate. Neonates with Pierre Robin are at risk of upper airway obstruction and may require surgical fixation of the tongue to the mandible. Such neonates are at high risk of hypoxia and difficult to intubation during induction of anesthesia. We report a case of an 11-day old neonate with Pierre Robin syndrome was intubated in operative room and emergency room. While under general anaesthesia, awake intubation was attempted and facilitated oxygenation. After a 4 day discharge, he revisited to emergency room due to airway obstruction symptom. Repeated attempts at intubation (again with spontaneous breathing) failed. Finally, laryngeal mask airway (LMA) was introduced, and as a result of this ventilation was achieved. The next day, we awake fiberoptic intubation through the laryngeal mask and were easily achieved.

부고조파 자기발진기를 이용한 K-band 저잡음 하향변환기의 설계

김상훈,이영철 慶南大學校 附設 工業技術硏究所 2002 硏究論文集 Vol.20 No.-

본 논문에서는 하나의 능동소자로 발진특징과 믹서특징을 동시에 나타내는 자기발진믹서를 이용하여 K-대역 저잡음 하향변환기를 설계하였다. 발진기는 고 안정 유전체 발진기 소자의 비선형 동작으로 제2차고조파 발진신호를 국부발진주파수로 동작시켰으며 게이트 믹서 형태로 자기발진믹서를 설계하였다. 설계제작된 저 잡음하향변환기의 2단 저잡음 증폭기는 1.5dB 이하의 잡음지수와 21dB의 이득을 나타내었으며 자기발진믹서는 제2고조파 자기발진주파수 17.177GHz에서 출력전력은 -34.17dBm, 위상잡음은 -75.33dBc/Hz@10KHz의 특성이 나타났고 부고조파를 적용한 자기발진믹서에서 변환이득은 8.5dB이었다. In this paper, we presents a K-band low noise downconverter adapting a sub-harmonic self-oscillating mixer which shows oscillation and mixing operations in an device. Local frequency of self-oscillating mixer as a local oscillator of high stable dielectric resonant microwave oscillation, is generated the second harmonic frequency by the nonlinear characteristic of HEMT. As a result of experiments, designed K-band low noise amplifier shows that noise figure under 1.5dB, 21dB amplifier gain, and self-oscillating mixer shows the 17.177GHz second harmonic frequency and -34.17dBm output power, and the phase noise is -75dBc/Hz at 10KHz offset frequency. total conversion gain of downconverter is 8.5dB respectively.

삼성전관(주)의 ERP 시스템 구축사례

김상훈 한국경영과학회 1998 經營 科學 Vol.15 No.2

Recently ERP(Enterprise Resource Planning) package has been one of important issues in developing information systems in many Korean companies. The main objectives of this study are to analyse the case of implementing ERP system in Samsung Display Devices Co. which is rated to be successful, and to derive significant implications for effective ERP implementation. First, this study focused on showing the detailed roadmap of performing ERP implementation project which largely consists of 5 stages(planning and organizing, visioning, process redesign and mapping, testing and arrangement, and installation and roll-out to overseas subsidiaries), and explaining key activities in each stage. Second, the performance of this project was evaluated on the basis of both process-centered criteria and result-centered ones. Finally, this study intended to discuss and explicate the bottlenecks and the critical success factors in implementing this project. The findings of this case study are thought not only to be useful as a practical guideline in carrying out ERP implementation project but also to provide significant basis for constructing the theoretical framework of effective ERP implementation.

성취관련 자기 불일치와 평가위험 스트레스가 수행불안에 미치는 효과

표경식,조용래,이무석,김학렬,박상학,김상훈 大韓神經精神醫學會 1998 신경정신의학 Vol.37 No.6

목적: . 취약성 -스트레스 모델에 입각하여 과제수행중의 불안수준(정서적. 인지적 및 행동적 측정치)이 성취관련 자기 불일치(=심리적 취약성 변인)와 평가위협 스트레스(=스트레스 유발인)의 상호작용에 의해 영향을 받는 지를 알아보고자 하였다 이를 토대로, 수행불안의 발생기전을 밝히며. 더 나아가서는 수행 불안을 효과적으로 감소시키고 적절하게 예방하기 위한 심리학적 대책을 제안하고자 하였다. 방 법 : 자기 불일치 고 집단과 저 집단에 속하는 대학생을 각각 40명씩 선발하여 각 집단별로 절반씩 평가위협조건과 중성적인 조건에 무선 할당한 후 지적 능력 과제(언어추리검사와 바꿔쓰기검사)를 실시하였다. 결 과 : 평가위협 조건에서 자기 불일치 고 집단이 저 집단에 비해 과제 수행동안의 상태불안수준이 유의하게 높았을 뿐만 아니라.자기 불일치 고 집단의 경우 중성적인 조건에 비해 평가위협 조건에서 상태 불안수준이 더 높았으며, 이러한 차이는 통계적으로 유의한 경향성을 보였다. 그 반면에,중성적 조건에서 두 집단간 차이와. 자기 불일치 저 집단에서 스트레스 수준간의 차이는 모두 유의하지 않았다. 또한 자기 불일치 고 집단이 저 집단에 비해 스트레스 수준에 상관없이 과제를 수행하는 동안 인지적 방해를 더 많이 받았다. 자기 불일치 고 집단이 저 집단에 비해 스트레스 수준에 상관없이 바꿔쓰기검사에서 더 낮은 수행을 보이는 경향이 있었으나. 언어추리검사에서는 어떤 효과도 유의하지 않았다. 결 론: 수행불안은 성취관련 자기 불일치와 평가위협 스트레스에 의해 영향을 받으며, 이 두 가지 변인의 상호 작용에 의하여 발생할 것이라는 가설은 수행불안의 정서적 측정치에서 비교적 강하게 지지되었다. 뿐만 아니라. 이러한 가설은 수행불안의 인지적 및 행동적 측정치에서도 역시 부분적으로 지지되었다. 이러한 결과들로 보아 수행불안의 발생과정을 이해하고 이런 불안을 효과적으로 예방하거나 감소시키기 위해서는 성취관련 자기 불일치 변인과 평가위협 스트레스를 함께 고려하는 것이 중요하다고 결론 내릴 수 있다. 0bjectives The purpose of this study to examine if the levels of anxiety(emotional, cognitive, and behavioral measures) during performance are influenced by interaction of both achievement related self discrepancy( = psychological vulnerability variable) and evaluative threat stress(=stressor) based on vulnerability-stress model in order to identify the mechanism of development of performance anxiety and futhermore to suggest psychological intervention strategies to reduce and prevent it effectively. Method : High and lows self discrepancy subjects consisted of students from the upper(n=40) and lower 15%(n=40) on achievement related self discrepancy scale, respectively. They were randomly assigned to either evaluative threat condition or neutral condition, and then all subjects took intellective task(verbal reasoning test and digit symbol test). Results : The results were as fo11ows : 1) High self discrepancy subjects under evaluative threat reported significantly higher level of state anxiety during performance than low self discrepancy subjects under any condition and also experienced higher degreee of state anxiety with marginal significance than high self discrepancy subjects under neutral condition, whereas there were no significant effects on the anxiety level of group variable under neutral condition or of stress variable in low self discrepancy subjects. 2) High self discrepancy subjects reported more cognitive interference during performance than low self discrepancy subjects regardless of the level of stress. 3) High self discrepancy subjects performed marginally significantly more poorly in digit symbol test than low self discrepancy subjects regardless of the level of stress, whereas there were no significant effects on verbal reasoning test. Conclusion : The hypothesis that performance anxiety could be affected by achievement related self discrepancy and stress, and specially by interaction between self discrepancy and stress was relatively strongly supported by the results on emotional measure of performance anxiety. In addition, this hypothesis received partial support by the results on cognitive and behavioral measures. We might conclude that it is important to consider achievement-related self discrepancy and evaluative threat stress together to understand the mechanism of development of performance anxity and to reduce or prevent this anxiety effectively.

움직임 색상정보와 동적 윤곽 정보를 이용한 물체추적

김상훈 한경대학교 2005 論文集 Vol.37 No.-

This paper suggests effective visual tracking system for moving objects with specified color and motion information. The proposed tracking system includes the object extraction and definition process which uses color transformation and AWUPC(Adaptive Weighted Unmatched Pixel Count) computation to decide the existence of moving object and active contour shape information is used to exactly tract the objects with shape changes. To define object's energy, shape energy function is introduced to represent the relation between the center and contour of object. And for the efficient solution of the correspondence problem, shape energy function uses the variation of the object's structure and position. Finally, real time tracking system is implemented to verify the effectiveness of the technique.

BLDC 전동기에서 PWM 방식에 따른 토크리플 저감에 관한 연구

김상훈,권경준 江原大學校 産業技術硏究所 2004 産業技術硏究 Vol.24 No.A

This paper presents a current control strategy to reduce torque ripple of Brushless DC Motor in commutation period with PWM pattern. The torque ripple is mainly caused by the inequality in the rate of change between rising current and decaying one during commutation. And also it is influenced by the shape of real back EMF. Therefore, in the proposed control strategy, considering real back EMF a compensation voltage is generated to equalize the rate of change in these commutating currents. And then, by providing the compensation voltage in commutation period with PWM pattern, the torque ripple can be reduced. The simulation and experimental results verify that the proposed method can reduce the torque and the current rippies significantly.

남성 성기자해에 대한 정신의학적 고찰

김상훈,김학렬,박상학,김재민,박찬원 朝鮮大學校 附設 醫學硏究所 2002 The Medical Journal of Chosun University Vol.27 No.2

Background and Objectives : As the authors experienced 2 cases of male genital self-mutilation while psychotic, investigated with psychiatric points of view including general and psychiatric characteristics, family background, Psychodynamics of genital self-mutilation in Korea. Materials and Methods : Among total 20 cases of the genital self-mutilation, 4 accident-caused cases were excluded. Results : Epidemiological data showed that the most of the genital self-mutilation cases are twenties(56.3%); most are sing1e(68.5%) and the lower socio- economic c1asses(43.8%), the proportion of believers(31.2%) are somewhat larger than of those don't have any religions; most(50.0%) have no occupation. The familial background appeared that the most of them have grown up under widow mother's care(45.5%) and in some other places than their own homes(45.5%) and that there are relatively more first son (45.5%) among them. In terms of the mutilation types and instruments, transection of penis type were committed most frequent1y(93.8%), mostly by knives(68.8%). The formal diagnoses were mainly schizophrenia(87.5%) and schizoid personality disorder(12.5%). Major symptoms at the time of the act were delusion and/or hallucmation(62.5%) and depressive state(43.7%). Psychodynamically, lots of cases could be explained as to punish failures in the male ro1e(21.9%), related to re1igiosity(15.6%), and the wish to be or delusion of being fema1e(12.5%). Conclusion : Psychiatric investigation on the cases of genital self-mutilation reported in Korea suggests that the risk factors for the selfUmutilation on the genitalia are the deprivation of the early experiences required for personality development, Presence of psychotic disorder or depression, identity confusion, and the guilty feelings toward sexual aggression.

선간 역기전력을 이용한 브러시리스 직류 전동기의 센서리스 제어

김상훈,이성경 江原大學校 産業技術硏究所 2009 産業技術硏究 Vol.29 No.B

This paper proposes a sensorless control method of BLDC motors using line-to-line back-EMFs. Typical sensorless control methods have various problems such as the difficulty in operation at low speed and difficulties in application and so forth. However, the control method using line-to-line back-EMFs that this paper proposes solved not only such problems but also problems of noise and difficulty of commutation detection. The method is to divide line-to-line back EMF into the constant. With 550[W] BLDC motor driving system, simulations and experiments have been carried out for the verification of the proposed control method.

웨스트민스터 신앙고백서에 근거한 개혁주의 성경관 연구

김상훈 總神大學校 2003 總神大論叢 Vol.22 No.-

대한 예수교 장로회 신조 제 1조의 '신구약 성경은 하나님의 말씀이니, 신앙과 행위에 대하여 정확 무오한 유일의 법칙이다'는 내용은 웨스트민스터 신앙고백서 제 1장 제 2항의 요약이라 할 수 있다. 개혁주의의 입장에 있는 우리 '장로회' 는 웨스트민스터 신앙고백서를 교단의 신앙적 입장으로 받아들였다. 1643년 7월 신학자 121명과 평신도 성경학자 30명으로 된 151명의 위원이 영국 웨스트민스터 채플에서 약 5년에 걸쳐 완성한 웨스트민스터 신앙고백은 장로교회에 청교도적 개혁주의의 성격을 띈 성경적인 교리로서 인정되어 장로교의 기본교리로 채택되어 왔다. 전문 33장으로 되어 있는 이 고백서는 성경, 하나님, 창조와 섭리, 타락과 언약. 그리스도 등에 대한 교리적 내용과 함께 선행, 양심, 주일, 위정자. 결 혼 등의 신자의 삶의 실천적인 문제에 이르기까지 적지 않은 주제들이 거론되고 있다. 고백서는 첫 장을 성경에 대한 장으로 할애한다. 그만큼 성경에 대한 입장이 우선적으로 중요하기 때문일 것이고 또한 성경과 계시에 대한 바른 이해 없이 그 이상의 신앙적 내용을 소개할 수 없기 때문일 것이다. 본 논문에서는 웨스터민스터 신앙고백서(이하 '고백서' )의 제 1장 성경관의 내용을 새롭게 정리 해설하며 이와 관련된 신학적 입장을 개진하려 한다. 이 제 1장(성경)에는 모두 10항목에 걸쳐 성경에 대한 개혁주의적 견해를 세부적으로 소개하고 있다. 열가지의 내용은 그 자체로 중요한 부분들이다. 이들을 주제와 관련해서 크게 다섯 부분(성경의 필요성, 성경의 범위와 영감성, 성경의 권위, 성경의 역할, 성경의 보존과 해석 등)으로 묶어 이해할 수 있을 것이다.

Duchenne 근이영양증 환자에서 Propofol과 Remifentanil을 이용한 전정맥마취 경험 : 증례보고

김상훈,이현영,소금영,정종달,고지현 朝鮮大學校 附設 醫學硏究所 2009 The Medical Journal of Chosun University Vol.33 No.S

Patients with Duchenne's muscular dystrophy are considered to be at risk of peri-operative complications. It's patients can be associated with cardiac arrest, rhabdomyolysis, malignant hyperthermia during anaesthesia. This is a case report of a 14 years old male patient who had known Duchenne muscular dystrophy was scheduled for open reduction and internal fixation of right humerus fracture. Regional anesthesia was refused by the patient. Total intravenous anesthesia (TIVA) was performed with propofol and remifentanil, which was started at the targeted effect concentration of 3.0μg/ml and 10ng/ml via target controlled infusion. After the end of operation, the patient was awaken without any problem and was transferred to recovery room.