새로운 리더십 패러다임에 따른 전문비서의 조직몰입에 관한 연구

강제상,박용석 경희대학교 사회과학대학 2000 社會 科學 論叢 Vol.18 No.-

달팽이관내 기저막의 유한요소 모델링

강희용,양성모,김봉철,임재중,용부중 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.1

Cochlea is well known to have the ability to analyze a wide frequency and this ability seems to be caused to the Basilar Membrane(BM) configuration. However, the relationship between the Cochlea frequency-position map is not clear. In this paper, the three-dimensional BM model was made using the Finite Element Method. Then, an attempt was made to examine the influence of the BM configuration on the Cochlea frequency-position map.

호프필드 신경회로망의 입력단에서의 안정성 분석

김용완,강민제 제주대학교 산업기술연구소 2000 尖端技術硏究所論文集 Vol.11 No.1

The negative weight often can be seen in Hopfield neural network, which is difficult to implement negative conductance in circuits. So we replaced the negative weight with the positive by using inverting neurons. And It has been shown that the input conductance affects the stability of the circuits greatly, and this paper offers the way to decide the appropriate value.

미세가공기술을 이용한 Interdigitated Array 전극의 제작 및 응용

이강신,김태한,김승렬,신민철,이원용,박제균 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

Interdigitated array (IDA) electrodes were fabricated using silicon technology for highly sensitive biosensing. Thin-film platinum and gold IDA electrodes were fabricated with 10 μm band width and 7 μm gap between the bands using photolithographic techniques. The IDA electrode has 100 fingers consisting of 50 finger anodes and 50 finger cathodes. By applying both the oxidation and the reduction potentials of a reversible redox couple, ferrocyanide, to the pairs of the IDA electrode, an increased current generation can be observed. In our experiment, the collection efficiency of IDA electrode was 46% and amplification factor was 12.6. This preliminary experiment implies that the IDA electrode could be applied to biosensor fabrications as the sensitive electrochemical transducer when a lower detection limit is needed such as phenol sensor for drinking water analysis.

신경망을 이용한 2-bit A/D 컨버터의 과도해석

김용완,강민제 제주대학교 산업기술연구소 2000 尖端技術硏究所論文集 Vol.11 No.2

This paper shows that the capacitance of the input space of the neuron affects the point of convergence of the output of the neuron in Lapunove energy function for Hopfield neural network. And this paper also shows that the gain factor of sygmoid function affects the shape of energy map and the point of convergence of the output of the neuron.

신경망을 이용한 2-bit A/D 컨버터의 과도해석

김용완,강민제 濟州大學校 産業技術硏究所 2000 산업기술연구소논문집 Vol.11 No.2

This paper shows that the capacitance of the input space of the neuron affects the point of convergence of the output of the neuron in Lapunove energy function for Hopfield neural network. And this paper also shows that the gain factor of sygrnoid function affects the shape of energy map and the point of convergence of the output of the neuron.

호프필드 신경회로망의 입력단에서의 안정성 분석

김용완,강민제 濟州大學校 産業技術硏究所 2000 산업기술연구소논문집 Vol.11 No.1

The negative weight often can be seen in Hopfield neural network. which is difficult to implement negative conductance in circuits. So we replaced the negative weight with the positive by using inverting neurons. And It has been shown that the input conductance affects the stability of the circuits greatly. and this paper offers the way to decide the appropriate value.

신경회로망을 이용한 A/D 컨버터의 소수점으로의 확장

김용완,강민제 濟州大學校 情報通信硏究所 2000 情報通信硏究所論文集 Vol.3 No.-

A/D converter has made to able to display the result of AID conversion enlarging down to the decimal point by improving the performance of A/D converter using a neural network. The network employs Hopfield뭩 model of a neuron with the connection elements specified on the basis of an analysis of the energy function. It is proposed to reduce the error of conversion between analog and digital by using 2^(-1), 2^(-2) ... when analog is converted to digital. Simulation has shown that most of the analog converges to the digital close to the original analog value.

강박증 환자에서의 인격장애 공존병리에 관한 연구

이동우,강웅구,류인균,정도언,조맹제,우종인,김용식,권준수 大韓神經精神醫學會 2001 신경정신의학 Vol.40 No.3

연구목적 : 강박증의 동반인격장애에 관한 연구들은 기존의 개념과 달리 강박성 인격장애와 강박증 간에는 특이적인 관계가 없으며, 강박증 환자들은 다양한 인격장애를 동반한다는 결과를 보여주었다. 그러나 이러한 연구들은 동반 인격장애에 관한 기술적인 분석에 그쳤고, 강박증 환자군의 임상 증상과 동반 인격장애 양상간의 연관성에 관한 분석을 시행하지 않았다. 본 연구의 목적은 강박증 환자군에서의 동반 인격장애를 평가하고 강박증 환자의 다양한 증상과 동반 인격특성 간의 연관성에 대해 연구하는 것이다. 방 법 : DSM-IV의 강박증의 진단기준을 만족하는 59명의 환자군과 32명의 정상대조군을 대상으로 인격장애 질문지를 적용한 후 4∼6점의 절단점을 기준으로 인격장애의 진단이 내려졌다. 먼저 환자군과 정상대조군 간의 특정 인격장애 빈도의 차이를 알아보기 위하여 Fisher's exact test를 시행한 후, 두집단 간에 유의한 차이가 있는 것으로 밝혀진 인격장애 척도 점수에 미치는 Y-BOCS,BDI,BAI점수의 영향을 알아보기 위하여 다중선형회귀 분석을 시행하였다. 결 과 : 1) Fisher's exact test 결과 강박증 환자군은 정상 대조군에 비해 경계성 인격장애(18.6%vs 0%, p=0.007). 회피성 인격장애(55.9% vs 18.8%, p=0.001), 우울성 인격장애(40.7% vs 0%, p=0.000)의 비율이 유의하게 높았다. 2) 다중선형회귀분석 결과 Y-BOCS 점수 (t=2.10, p=0.043)와 BAI점수(t=2.60, p=0.014)는 경계성 인격장애 점수에 유의한 영향을 주는 것으로 나타났다. 또한 BAI점수(t=3.23, p<0.003)는 회피성 인격장애 저수에, BDI점수 (t=3.08, p=0.004)는 우울성 인격장애 점수에 유의한 영향을 주는 것으로 나타났다. 결 론 : 강박증 환자군은 정상 대조군에 비해 회피성 인격장애, 우울성 인격장애, 경계성 인격장애의 동반율이 높고, 강박증이 경계성 인격장애의 심각도에 유의한 영향을 미치는 것으로 사료된다. The purpose of this study was to assess the comorbid axis-Ⅱ disorders of obsessive compulsive disorder(OCD) patients and to investigate the relationship between symptoms of OCD and the comorbid personality traits. The subjects were 59 patients who met DSM-IV criteria for obsessive-compulsive disorder and 32 normal controls. All subjects completed personality Disorder Questionnaire-IV(PDQ-IV). The patients completed Beck Depression Inventory(BDI) and Beck Anxiety Inventory(BAI), and were rated with Yale-Brown Obsessive Compulsive Scale(YBOCS). The results were as follows. 1) The OCD patients showed significantly higher prevalence of avoidant, depresssive and borderline personality disorder(p<0.01) compared to controls. 2) The BAI score had significant effect on the avoidant personality score(t=3,23, p<0.003). The BDI score had significant effect on the depressive personality score(t=3.08, p=0.004). The YBOCS(t=2.10, p=0.043) and BAI(t=2.60, p=0.014) scores had significant effects on the borderline personality score. We found that OCD patients had higher prevalence of avoidant, depressive, and borderline personality disorders. We also found that obsessive-compulsive symptoms have significant effect on the severity of borderline personalty traits. We suggest that it would be very helpful to consider Axis-Ⅱ disorders for managing patients with obsessive-compulsive disorder.

한국 정신장애의 역학 조사 연구[I] : 각 정신장애의 유병률

조맹제,함봉진,김장규,박강규,정은기,서동우,김선욱,조성진,이준영,홍진표,최용성,박종익,이동우,이기철,배재남,신정호,정인원,박종한,배안,이충경 大韓神經精神醫學會 2004 신경정신의학 Vol.43 No.4

Objectives : This study aims to estimate the prevalence of the DSM-IV psychiatric disorders in Korean population using the Korean version of Composite International Diagnostic Interview (K-CIDI). Methods : Subjects were selected by taking multi-stage, cluster samples of 7,867 adult household residents, 18 to 64 years of age, in ten catchment areas. Total 78 trained interviewers administered the K-CIDI to the selected respondents, from June 1 to November30,2001. Results : Total 6,275 respondents completed the interview. Some 33.5% of respondents reported at least one lifetime disorder, 20.6% reported at least one-year disorder, and 16.7% reported at least one-month disorder. The most common lifetime disorders were alcohol abuse/dependence (17.24%), nicotine dependence/withdrawal (11.19%), specific phobia (5.16%), and major de-pressive disorder (4.25%). The lifetime prevalence of substance abuse/dependence (0.25%) and schizophrenia (0.16%) was very low. Nicotine and alcohol use disorder showed very high male/female ratio. Mood disorder and anxiety disorder were more prevalent among female than male. Conclusion : The prevalence of psychiatric disorders was high. In comparison with other studies, remarkable differences in distributions of psychiatric disorders across the areas and times were observed.