뇌파의 임상적 유용성 : 뇌파소견과 뇌전산화 단층촬영 검사 및 뇌자기공명 영상검사 소견을 비교하여

강동우,이영호,최영희,정영조,Kang, Dong-Woo,Lee, Young-Ho,Choi, Young-Hee,Chung, Young-Cho 대한수면의학회 1996 수면·정신생리 Vol.3 No.2

To demonstrate the clinical usefulness of electroencephalography (EEG) and factors increasing the usefulness of EEG, the authors evaluated each relationship between EEG related factors and clinical variables, and neuroimaging studies (CT and MRI)-related factors, and factors which are related with routine neurological examination for 207 patients who had been evaluated with both of EEG and neuroimaging study(CT or/and MRI). The results were as follows: 1) Abnormality of EEG findings had significant relationships with chief complaints, diagnosis, medication use, seizure attack, pathological reflex, and level of consciousness. However there were no significant correlations between abnormality of EEG findings and neuroimaging studies (CT and MRI)- related factors. 2) Laterality of EEG findings had significant relationships with abnormality, laterality, and focality of CT findings, and also with abnormality of MRI findings. But there were no significant correlations between laterality of EEG findings and clinical variables, and neurological examination-related factors. 3) Anterior-posterior distribution of EEG findings was significantly related with medication use. 4) Focality of EEG findings had significant relationships with sex, sensory dysfunction sign, and cerebellar dysfunction sign. But there were no significant correlations between focality of EEG findings and neuroimaging studies(CT and MRI) related factors. 5) Abnormal EEG pattern had significant correlations with various factors, such as age, chief complaints, duration from onset of symptom to taking MRI, seizure attack, abnormality and nature of lesion in CT findings, cortical atrophy in MRI findings, motor dysfunction sign, sensory dysfunction sign, and pathological reflex. 6) With abnormality on sleep activation, age, age of onset, seizure attack, ventricular enlargement in CT findings, and abnormality of MRI findings were significantly correlated. 7) With abnormality on hyperventilation activation, duration of illness and laterality of MRI findings were significantly correlated. Above results may suggest that abnormality of EEG findings is more closely related with functional change of the brain than structural changes of the brain and laterality of EEG findings is vice versa. And also that medication use has an influence on anterior versus posterior distribution of EEG findings and focality of EEG findings is not related with structural changes of the brain. Activation with sleep may be effective to show age differences and provocation of seizure activity and hyperventilation may be effective to detect the abnormal EEG findings by cerebrovascular insufficiency.

SDH 기반 광 전달망에서 연결 설정을 위한 집중형 제어 체계에 관한 연구

강동우,김달원,조규섭,예병호,Kang Dongwoo,Kim Dalwon,Cho Kyuseob,Yae Byungho 한국통신학회 2005 韓國通信學會論文誌 Vol.30 No.11B

폭발적으로 증가하는 데이터 트래픽을 수용하기 위해 광 전송망이 핵심적인 해결책으로 부각되고 있으며, 대규모의 광 전달망에서 사용자가 원하는 대역폭의 단대단 연결을 실시간 수준으로 제공하기 위한 제어구조 관련 연구가 요구되고 있다. 이러한 문제 해결을 위해, IETF와 ITU-T에서는 차세대 통합 전달망의 연결 제공 시간을 단축시키기 위한 제어 평면에 대한 연구를 의욕적으로 진행하고 있으며, 그러한 연구들은 기본적으로 분산형 제어체계에 기반하고 있다. 본 연구에서는 집중형 제어 체계가 분산형에 비해 가지고 있는 고유한 장점들을 광 전달망 상에 활용하기 위한 연구로서, 광 전달망의 연결 제어에 대한 집중형 제어 체계의 적용 가능성을 조사하고, 새로운 제어 구조의 형태와 제어 절차를 제안하였다. 또한 제안한 구조에 대한 IETF의 기존 라우팅 프로토콜과 시그널링 프로토콜의 활용 가능성을 검토하고 필요한 보완 부분에 대해 제시하였다. Recently, there has been a dramatic increase in data traffic, driven primarily by the explosive growth of the Internet. Optical networking is believed as a key solution to keep up with the growth, thus, the most pressing issue is how to manage and control large optical networks. Currently, provisioning end-to-end connections across the transport network has involved the network operator, leading to long provisioning times in an era when customers are demanding shorter provisioning time. To address this critical issue, new control intelligence is being studied for use within optical networks to shorten provisioning time. Both the IETF and the ITU-T have been aggressively defining many aspects of a control plane for the next generation convergence transport network. Basically, they are based on the distributed control scheme. In this Paper, we suey the applicability of the centralized control scheme for the provisioning control of optical transport network to utilize its inherent advantages over the distributed control scheme. We discuss new central control architecture, and control procedure. Also, we examine the applicability of the existing IETF routing and signaling protocols to the new control concepts, and then, we propose the additional routing and signaling information elements.

멀티프라이머리 디스플레이를 위한 3D-LUT 색 신호 분리 방법

강동우,조양호,김윤태,최원희,하영호,Kang Dong-Woo,Cho Yang-Ho,Kim Yun-Tae,Choe Won-Hee,Ha Yeong-Ho 대한전자공학회 2005 電子工學會論文誌-SP (Signal processing) Vol.42 No.6

본 논문에서는 멀티 프라이머리 디스플레이(multi-primary display; MPD)에서 색 재현을 위해 선형 LAB 색공간에서 3차원 took-up-table(3D-LUT)을 이용한 색신호 분리방법을 제안한다. 제안한 방법은 인간 지각의 3가지 속성을 반영하는 선형 LAB 색공간에서 작성된 MPD 색역의 경계를 적은 용량의 메모리를 가지는 3D-LUT로 작성한다. 이때 색역 경계점의 자극치와 MPD의 색신호의 선형관계를 이용하여 3D-LUT에는 휘도 및 색상에 대한 채도와 색신호 조합이 저장된다. 작성된 3D-LUT에 기반하여 입력 자극치에 대응하는 MPD 색신호를 주변 색역 경계점의 색신호 변화를 고려하여 색역 경계점과 입력의 채도비로 보간한다. 그 결과, MPD 색신호가 연속적 계조를 가지도록 하였다. 또한 선형 LAB 색공간에서 색역 경계 LUT를 사용하여 연산의 복잡도를 감소시키고 MPD의 부드러운 색신호 변화를 유도하였다. This paper proposes the color decomposition method for multi-primary display (MPD) using a 3-dimensional look-up-table (3D-LUT) in a linearized LAB space. The proposed method decomposes conventional three-primary colors into the multi-primary control values of a display device under constraints of tristimulus match. To reproduce images on the MPD, the color signals should be estimated from a device-independent color space, such as CIEXYZ and CIELAB. In this paper, the linearized LAB space is used due to its linearity and additivity in color conversion. The proposed method constructs the 3-D LUT, which contain gamut boundary information to calculate color signals of the MPD. For the image reproduction, standard RGB or CIEXYZ is transformed to the linearized LAB and then hue and chroma are computed to refer to the 3D-LUT. In the linearlized LAB space, the color signals of a gamut boundary point with the same lightness and hue of an input point are calculated. Also, color signals of a point on gray axis are calculated with the same lightness of an input. With gamut boundary points and input point, color signals of the input points are obtained with the chroma ratio divided by the chroma of the gamut boundary point. Specially, for the hue change, neighboring boundary points are employed. As a result the proposed method guarantees the continuity of color signals and computational efficiency, and requires less amount of memory.

전자소자 기반 테라헤르츠 반도체 기술 동향

강동우,구본태,Kang, D.W.,Koo, B.T. 한국전자통신연구원 2018 전자통신동향분석 Vol.33 No.6

Traditionally, many researchers have conducted research on terahertz technology utilizing optical devices such as lasers. However, nanometer-scale electronic devices using silicon or III-V compound semiconductors have received significant attention regarding the development of a terahertz system owing to the rapid scaling down of devices. This enables an operating frequency of up to approximately 0.5 THz for silicon, and approximately 1 THz for III-V devices. This article reviews the recent trends of terahertz monolithic integrated circuits based on several electronic devices such as CMOS, SiGe BiCMOS, and InP HBT/HEMT, and a particular quantum device, an RTD.

수도권의 주택점유 특성 변화로 분석한 슈바베의 가설

강동우,이성우,김현중,Kang, Dong-Woo,Lee, Seong-Woo,Kim, Hyun-Joong 한국토지주택공사 토지주택연구원 2012 LHI journal of land, housing, and urban affairs Vol.3 No.1

본 연구는 1990년 이후 인구 및 사회경제적으로 고도화된 경제발전의 특징을 보이는 수도권의 주택점유 특성변화를 분석하기 위해서 슈바베의 가설을 검정하였다. 슈바베의 가설은 한 나라의 경제발전에 따라 주택수요를 결정하는 요인이 사회경제적 요인 보다는 인구학적 요인으로 옮겨갈 것이라는 것이다. 슈바베의 가설을 검정하기 위해 본 연구에서는 1980년부터 2005년까지 통계청에서 제공하는 인구주택총조사 자료를 이용하여 약 25년동안 노정된 수도권 자가소유에 대한 수요 변화의 특성을 분석하였다. 본 연구에서는 Binary probit모형과 Blinder-Oaxaca 해체기법을 응용하였으며, 연구결과는 두 가지 연구가설이 성립하는 것으로 나타났다. 자가소유로 측정한 주택수요변화의 경우 사회경제적 요인보다는 인구학적 변화의 영향력이 1980년대 이후 지속적으로 증대되어 온 것으로 드러났다. 요약하면, 수도권 주택시장의 경우 주택점유에 있어서 가구의 경제적 능력보다는 인구학적 특성변화에 따른 주택소비 구입의사의 중요성이 점차 증대되고 있는 것으로 나타나 슈바베의 가설이 유효함을 보여주고 있다. The Schwabe's law explains the housing demand weighs more on demographic factors rather than on socio-economic factors as societies achieve higher level of economic development. Based on Schwabe's law, the present study constructs a hypotheses to analyze changes of housing demand with respect to housing tenure change in Seoul Metropolitan Area (SMA) during the periods of 1980 to 2005. To test the hypotheses, the authors take advantage of the Population and Housing Census 2% data from 1980 to 2005. The authors apply binary probit with decomposition method to verify our hypotheses. The authors found that the influence of socio-economic factors on housing tenure have been weakened in the housing market during the periods of 1980 to 2005. On the other hand, the relative influence of demographic factors have been strengthened in the housing market during the periods. The present study concludes that housing demand in the SMA have been dramatically changed from socio-economic characteristics to demographic factors to decide housing tenure during the periods, which confirms the hypotheses of the present study.

공황 장애 환자의 인지-행동 치료 1례

강동우,최영희,이정흠,정영조,Kang, Dong-Woo,Choi, Young-Hee,Lee, Jung-Hum,Chung, Young-Cho 한국정신신체의학회 1996 정신신체의학 Vol.4 No.2

In spite of its prominent effects on reduction of panic attacks and preveniton of relapse, cognitive-behavioral therapy(CBT) for panic disorder is seldomly utilized and studied in this country. for the past year, authors have modified CBT program for panic disorder that was based on PCT(panic control program) designed by Dr. Barlow and Dr. Craske. Our program is composed of informational component, somatic management skills, cognitive restructuring, interoceptive exposure and in vivo exposure. One patient has significantly improved by this program and satisfied with the treatment result. The aim of this article is to present our experience of treating a panic patient with CBT.

Mossbauer 효과에 의한 제주도 찰흙의 함철 광물의 열적 거동과 상변환에 관한 연구

강동우,김두철,류재연,고정대,홍성락,송관철 ( Dong Woo Kang,Doo Chul Kim,Jai Yon Ryu,Jeong Dae Ko,Sung Rak Hong,Kwan Cheol Song ) 한국광물학회 1997 광물과 암석 (J.Miner.Soc.Korea) Vol.10 No.2

Fuzzy Control System에서 효과적인 비퍼지화 방법에 관한 연구

강동우(Dong Woo Kang),이상배(Sang Bae Lee) 한국지능시스템학회 1994 한국지능시스템학회 학술발표 논문집 Vol.- No.-

Fuzzy Control System에서 효과적인 비퍼지화 방법에 관한 연구

강동우(Dong Woo Kang),이상배(Sang Bae Lee) 한국지능시스템학회 1994 한국지능시스템학회 학술발표 논문집 Vol.4 No.2

48V 마일드 하이브리드 시스템의 연비 향상에 관한 연구

강동우(Dongwoo Kang),노윤주(Yoonju Noh),김청호(Cheongho Kim) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11