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김병광,이철하,권수림,정창영,천창환,박민우,나용천,Kim, Byoung-Kwang,Lee, Cheol Ha,Kwon, Surim,Jung, Changyoung,Chun, Chang Hwan,Park, Min Woo,Na, Yongcheon 한국자동차안전학회 2017 자동차안전학회지 Vol.9 No.2
An autonomous driving system based on a precise digital map is developed. The system is implemented to the Hyundai's Tucsan fuel cell car, which has a camera, smart cruise control (SCC) and Blind spot detection (BSD) radars, 4-Layer LiDARs, and a standard GPS module. The precise digital map has various information such as lanes, speed bumps, crosswalks and land marks, etc. They can be distinguished as lane-level. The system fuses sensed data around the vehicle for localization and estimates the vehicle's location in the precise map. Objects around the vehicle are detected by the sensor fusion system. Collision threat assessment is performed by detecting dangerous vehicles on the precise map. When an obstacle is on the driving path, the system estimates time to collision and slow down the speed. The vehicle has driven autonomously in the Hyundai-Kia Namyang Research Center.
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김병광,이희발,정시전,우무영 대한신장학회 1983 Kidney Research and Clinical Practice Vol.2 No.2
Left ventricular function was evaluated by M-mode echocardiography in 22 normal subjects (normal con- trol), 15 patients with chronic renal failure who have not yet received dialysis therapy(uremic control), 17 patients who have performed CAPD for at least 3 months (CAPD group) and 11 patients who have been on maintenance hemodialysis for more than 3 months. Of 11 hemodialysis patients, 7 patients were studied immediately before hemodialysis(prehemodi- alysis group) and 9 patients immediately after hemodi- .alysis(posthemodialysis group). 5 patients were studied before and after hemodialysis. Left ventricular systolic internal dimension(LVIDs) .and left ventricular diastolic internal dimension(LVIDd) were significantly greater in 4 groups with chronic renal failure as compared to normal control. LVIDs was, however, significantly smaller in CAPD group and posthemodialysis group when compared to uremic control. There were no difference in LVIDd among 4 groups with chronic renal failure. Ejection time was not different among 5 groups. Ejection fraction (EF), mean velosity of circumferential fiber shortening (Mvcf) and % Fractional shortening(% FS) were significantly decreased in uremic control but not in CAPD and two hemodialysis groups. Cardiac output was significantly greater in two hemodialysis groups when compared to normal control. In conclusion, left ventricular function was significantly decreased in uremic control but improved to normal control level after CAPD or hemodialysis. No difference in left ventricular function was observed when studied immediately before and after hemodialy sis. The improvement in left ventricular function after CAPD and hemodialysis was related in part to a decrease in LVIDs after CAPD or hemodialysis.
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심찬섭,김병광,이정호,박희숙,박춘식,정무찬,이희발,이혜경 순천향대학교 1984 논문집 Vol.7 No.3
Simple abdominal X-rays that included kidneys, ureters, and bladder(KUB) were obtained in 557 outpatients to investigate the frequency of conctipation and its relation to various abdominal symptoms. Four-hundred and six patients presented with various abdominal symptoms as their chief complaints and the remaining 151 patients had other symptoms. The distribution of fecal material within the large intestine was scored and the fecal retention was classified as mild, moderate, and severe. Chief complaints and final diagnosis when established failed to predict the severity of fecal retention but moderate or severe fecal retention was observed in 64% of all patients and in 61% of 265 patients in whom no other cause of abdominal was identified. Constipation as defined by moderate or severe fecal retention on KUB may or may not be symptomatic but may be a much more common cause of various abdominal symptoms in Koreans than has been known. A KUB may be a simple and inexpensive tool in the diagnosis of constipation.
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전창만,김병광,이창욱,한상익,백인호 大韓神經精神醫學會 1997 신경정신의학 Vol.36 No.6
흡연이 중추신경계에 미치는 영향을 알아보기 위하여 흡연자 24명과 비흡연자 14명을 대상으로 흡연 전후에 지표학적 전산화 청각 사건관련전위 검사를 시행하고 이를 아직까지 흡연연구에 시도된바 없는 전부위장력 측정 법으로 잠복기를 분석하여 다음과 같은 결과를 얻었다. 1) 흡연군과 비흡연군사이에서 P300의 잠복기를 비교하였을 때, 흡연군에서 흡연전값이 324.0±30.1흡연후 값이 309.8±31.5였고 비흡연군에서 흡연전값이 329.6±49.6 흡연후 값이 344±48.3으로 흡연군에서 비흡연군에 비해 흡연 후에 잠복기가 유의하게 감소하였다. 2) 흡연군과 비흡연군사이에서 P300의 최고전위점의 전위값을 비교하였을 때, 흡연군에서 흡연전값 이 3.99± 1.87 흡연후 값이 4.39±1.53였고 비흡연군에서 흡연전값이 4.53±1.57 흡연후 값이 3.92±1.55로 통계적으로 유의하지는 않았으나 흡연군에서 비흡연군에 비해 최고전위 점의 전위값이 흡연 후에 증가하는 경향을 보였다. 3) 흡연군과 비흡연군사이에서 P300의 최고전위와 최저전위의 차(difference between MAX and MIN)를 비교하였을 때, 홉연군에서 흡연전값이 7.86±4.11 흡연후 값이 8.67±2.90였고 비흡연군에서 흡연전값이 9.64±3.58 흡연후 값이 8.18±2.90으로 통계적으로 유의하지는 않았으나 흡연군에서 비흡연군에 비해 최고전위와 최저전위의 차값이 흡연후에 증가하는 경향을 보였다. 4) 그 외의 측정요소인 최고전위점의 전위값의 2차원 등전위 분포도상의 좌표, 최저전위점의 전위값과 그 좌표를 흡연전후에 비교하였을 때 두군간의 유의한 차이가 없었다. 이상의 결과로서 흡연이 청각 사건관련전위에 미치는 영향은 잠복기가 감소하고 최대 전위값과 최대전위와 최저전위의 차가 증가하는 소견을 보여 흡연이 흡연자에서 인지기능을 증가시키는 것으로 나타났다. Objectives : The authors studied the effects of cigarette smoking on the cognitive function with topographic mapping of auditory event-related potential P300. Methods : The subjects, 24 smokers and 14 nonsmokers, were assessed in the latencies and amplitudes of topographic auditory event-related potential P300 determined by Global Field Power Measurement. Results : 1) There were significant differences of P30O latencies between smokers and controls after smoking(ANOVAR, F= 10.45, P=0.0026). 2) There were no significant differences of P300 amplitude but a trend was present between smokers and nonsmokers after smoking(ANOVAR F=3.77, P=0.06). 3) There were no significant differences of difference between amplitude in maximal point and amplitude in minimal point but a trend was present between smokers and nonsmokers after smoking(ANOVAR F=3.68, P=0.063). 4) There were no significant differences of maximal point in X-axis and in Y-axis, minimal point in X-axis and in Y-axis of P300 between smokers and nonsmokers after smoking. Conclusions : These results support that auditory event-related potential P300 change by cigarette smoking is indicative of enhanced cognitive function.
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