Escherichia coli 패혈증 환자에 합병된 대칭적 하지 말단 괴사증 1예

남해성,유진홍,권순석,민준기,조현선,박민경,심병주,남유정,이지인,김진수,길욱현,조근종,신완식 대한감염학회 2005 감염과 화학요법 Vol.37 No.6

We have encountered a rare case of symmetrical peripheral gangrene complicating Escherichia coli sepsis in a 47-years-old male. He was successfully treated with antibiotics, anticoagulants, and vasodilator. To our knowledge, this is the first report on symmetrical peripheral gangrene complicating E. coli sepsis in Korea.

축전지 사업장에서 공기 중 납 농도의 허용노출기준 초과율 변화에 관한 연구

최재욱,김남수,함정오,이병국 순천향대학교 의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.2

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골반통증을 동반한 폐쇄신경 기원의 퇴행성 신경초종

이상욱,김두상,조현득,이창호,전윤수,이남규 순천향의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.1

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광섬유 격자 다중화 스트레인 센서 시스템

이용욱,정재훈,정승환,이병호,김남식 한국비파괴검사학회 2001 한국비파괴검사학회지 Vol.21 No.2

광섬유 센서는 구조물에 대한 비파괴적인 측정이 가능하고, 전자파에 의한 간섭이 발생하지 않으므로, 전자파 장애의 영향을 무시할 수 있는 장점이 있다. 또한, 구조물 건조시 콘크리트 같은 대상체에 광섬유를 내장시킬 경우에는 검사시 대상체를 파괴시키지 않고서도 대상체의 손상여부와 역학적 거동을 측정 및 해석할 수 있는 비파괴 검사 기술이다. 특히 광섬유 브래그 격자 센서는 그러한 대상체에 대한 비파괴 검사를 수행하는데 가장 적합한 센서이다. 광섬유 브래그 격자 센서는 그러한 대상체에 대한 비파괴 검사를 수행하는데 가장 적합한 센서이다. 광섬유 브래그 격자는 특정파장의 빛을 반사 또는 제거시키는 특성을 지니고 있으며, 스트레인 같은 물리량이 광섬유 브래그 격자에 가해지면, 반사되는 빛의 중심파장이 이동하여 이를 통해 물리량을 측정할 수 있다. 정ㆍ동적 스트레인을 측정할 수 있는 광섬유 브래그 격자 센서는 건축물이나 토목구조물 등의 안전 진단(health monitoring)을 위해 사용되고 있으며, 최근에는 도로나 교량과 같은 토목 구조물로의 응용에 있어서 필수적인 동적 스트레인의 측정에 대해 그 관심이 집중되고 있다. 본 연구에서는 패브리=페로(Fabry-Perot) 필터를 이용하여 다중점에서 동적 스트레인을 측정할 수 있는 센서 시스템을 제작하였으며, 제작된 센서 시스템을 모의 구조물(외팔보)에 적용하여 모의 구조물에 가해지는 정적, 동적 스트레인을 측정하였다. 측정 결과는 기존의 전기적 센서와 유사하였다. An optical fiber sensor is capable of nondestructive measurement of a structure and it has an advantage of the immunity to electromagnetic interference because light is not affected by electromagnetic wave. In addition, if optical fibers are buried in an object like a concrete, this sensor can analyze defects and physical status of the object without disassembling it. Especially, the fiber Bragg grating sensor is a promising optical fiber sensor capable of nondestructive test of such an object. A fiber Bragg grating has the characteristics of reflecting or blocking light of a specific wavelength. If we apply physical quantity like strain to the fiber Bragg grating, the center wavelength of the reflected light is shifted and then we can find the physical quantity applied to the fiber Bragg grating by measuring the center wavelength shift of the reflected light. The fiber Bragg grating sensor capable of static and dynamic strain measurement is being used in health-monitoring of buildings, structures, etc. Recently increasing is interest in dynamic strain measurement inevitable to the civil structures such as roads and bridges. In this study we implemented the optical fiber sensor system which can measure dynamic strain at multiple points using Fabry-Perot wavelength demodulation. And we measured the static and dynamic strain using this sensor system with a test structure(cantilever). Measurement results were similar to those obtained with the conventional electrical measurement methods.

Laser 광속에 의한 둥근관의 직경 측정

홍남관,류지욱 公州大學校 基礎科學硏究所 1997 自然科學硏究 Vol.6 No.-

본 연구에서는 레이저광의 출력안정성과 고지향성을 이용하여 한 점에서 나오는 레이저광을 확산시킨 후에 평행광속으로 만들어 일정한 면적을 비추어 줄 때 그 강도비를 측정하여 피측정물체의 직경을 잴 수 있는 장치를 만들었다. 이 장치를 이용하면 피측정 물체와 광센서가 직접접촉 되지 않아도 되며, 센서에서 피측정 물체 사이의 거리를 멀리할 수 있고, 측정 시간을 광 검출기와 전자부품의 반응한계까지 줄일 수 있으며, 피측정물체의 화학성분과는 무관하게 측정할 수 있다. 이 측정기로 둥근 물체의 직경, 가늘고 긴 선의 굵기 분포 등을 측정 하여 micrometer나 vernier calipers로 측정한 값과 비교한 결과 신뢰성이 있음을 확인할 수 있었다. A diameter measurement system using laser beam was developed. The laser beam was collimated to irradiate constant area. By measuring the ratio between input intensity and output intensity of the light, the size of an object can be scaled. The advantages of this system are to avoid the direct contact between an object and a sensor, to reduce the time of measurement, and to measure objects regardless of their chemical compositions. It was shown that our measurements were credible compared with results done by micrometers and vernier calipers.

經濟行政法의 基本原理에 관한 考察

김남욱 朝鮮大學校 社會科學硏究所 2000 社會科學硏究 Vol.21 No.2

S.Swamy의 貯蓄函數模型에 의한 韓國都市家計 貯蓄行態의 實證的 分析

高南旭 제주대학교 1984 논문집 Vol.18 No.2

This study has attempted to present on exploratory analysis of the urban household saving behavior in korea. This analysis of the urban household saving behavior is based on the time series of family budget survey data for 1967-1982. Although there can be many problems in the family data, these family budget data provide a better data base to test hypothesis regarding household saving function. This analysis is based on the hypothesis that saving of a household are not only changeable depending on its income level but also past saving behavior. In this paper, it is actually attempted to examine the effect on saving of past saving behavior by factors such as occupation of its head, household size and household composition. We have concentrated our effort on testing hypothesis relating to the household saving behavior. For our analysis, we used log-linear regression equations fitted by least squares method based on S. Swamy's dynamic savings function for various hypothesis testings. Our findings are summarized as follows: 1. There were some variations in the estimated value of the elasticity coefficient on the past saving behavior among the different occupational groups. In the urban salary and wage earner's households, the estimated value (a1) of the elasticity coefficient on the past saving behavior of the skilled workers is much higher than that of government employees. The value of a1 for the skilled workers is 0.7139; for the government, 0.2726; it is, however, remarked that the saving of income elasticity (a0) for the government employees is much higher than that of the skilled workers. The estimated value of the government employees is 2,0389; 0.,9506 for the skilled workers. This implies that within the urban salary and wage earner group, the past saving behavior is more important determinent of household saving than income level for the skilled workers, although government employees is dependent upon more income level than the part saving behavior. 2. Some empirical works on the saving behavior suggest that the family size affects the saving rate in developing countries, we have formulates the hypothesis that the family size itself is inversely related to the household saving. This hypothesis have been confirmed by Keynes's saving function. It was, however, found that the estimated value of elasticity coefficient on the past saving behavior increases as the family size increases. Elasticity coefficient on the past saving behavior of 2 persons are 0.4465, 3 persons, 0.5308, 4 persons, 0.694, 5 persons, 0.7034. This implies that household in increasing family effects to save for expendituring a higher proportion of their income for education of their children and for satisfing their income requirement at retirement. 3. We have examined whether the household saving behavior is affected by the age classes of family head. The estimated value of the elasticity coefficient on the past saving behavior by age of the head shows that 24 age group are 0.2407, 0.3709 for the 25-29 age group,0.500 for the 30-34 age group, 0.6675 for 35-39, 0.0427 for 40-49 age group, 0.1645 for the household of over 50 years old. It was, however, found that an elasticity coefficient of past saving behavior increase up to 40 years old, and thereafter declined.

움직임 분할을 이용한 프레임간 보간 기법

고남영,김동욱 群山大學校 情報通信技術硏究所 1998 情報通信技術硏究論文集 Vol.2 No.-

In this paper, we segment the motion fields, and propose a new video interpolation methods using variable interpolation rate based on that fields. Segmentation of motion fields is accomplished by mathematical morphological filtering and motion estimation of each region. Segmented motion fields are each classified to background, static, moving, exposed or occluded region based on motion properties. When motion is complicated and/or nonlinear, proposed interpolation method reduces interpolation rate. On the other hand, when motion is simple and/or linear, this method increases interpolation rate in other to keep the constant video quality.

성인 음낭수종의 치료로서 Window Operation의 효용성

서병욱,박영호,이남규,전윤수,김민의,김영호,송윤섭,구자현 순천향의학연구소 1999 Journal of Soonchunhyang Medical Science Vol.5 No.1

We intended to determine the usefulness of window operation for adult hydrocele repair. We reviewed medical records of 132 patients from January 1995 to June 1998 with primary hydrocele and evaluated complications and recurrence rates of eversion and/or excision, plication, and internal drainage technique. Recurrence rate was highest in internal drainage technique as 85.2%, and those of eversion and/or excision and plication technique were 1.3% and 4%, respectively. Complication rate was highest in eversion and/or excision technique, and lowest in internal drainage technique. Although complication rate was lowest in window operation, this operation could not be successful due to high recurrence, and we suggest that this operation should be abandoned for hydrocele repair.

高信賴性 遠隔制御機의 設計에 관한 硏究

김남욱,김영웅,김용득 亞洲大學校 1987 論文集 Vol.10 No.-

This paper deals with the design algorithm for the high reliable remoete controller. For reliable systems, it is suggested the design method to improve the error probability for the received data from the remote controller. And it is shown that the error probability by the testing the hardware is in good with that of the simulation by using the IBM PC/AT. As a result, it was possible to increase the reliability without adding the extra hardware circuits.