상류지점 수위표 수위변동에 따른 하류지점 수위표 수위변동예측

최한규,임윤수,백효선 江原大學校 産業技術硏究所 2010 産業技術硏究 Vol.30 No.B

Generally, the accuracy of the prediction of flood elevation is difficult to identify due to the sedimentation on a river bed, earth and sand being moved by flow, and localized torrential downpours caused by climate change. It is also because of natural and artificial influences on rivers. To predict river floodings successfully, more precise and reliable flood elevation prediction system is needed, in which the concentration time of downstream is numerically interpreted through analyzing and utilizing the watermark of the upper region. Therefore, this research analyzed the prediction methods of the changes in water levels, which use the watermarks of the upper region. The watermarks which impacts the spot being predicted of flood was selected through floodgate analysis and correlation analysis. With the selected watermarks, a statistically reliable regression equation was yielded.

고전압 전력 MOSFET의 설계기술개발

최연익,임한조,노영화 亞洲大學校 1986 論文集 Vol.9 No.-

Design programs which can be used for the fabrication of high-voltage power MOSFET's have been developed on HP-15C programmable calculator. Also, we proposed a method for finding optimum gate pitch with source pitch given after the specifications of the starting wafer and fabrication process were determined. The method was applied to the cases of using two kinds of epitaxially grown wafers and variations of on-resistance were studied in terms of source geometry, source pitch, gate-drain over-lap ratio, etc.

결함 허용성과 부하 균등화를 위한 프로세스 스케쥴러 연구

임종규,박영진,최길성,김한웅 안성산업대학교 1993 論文集 Vol.25 No.-

A Process Scheduler is designed for load balancing under normal state and for load redistribution under failure in a fail-soft distributed system. The proposed load redistribution algorithm is that if any soft-fault occurs in the local nodes, all the processes in the queue of the failed processor and all incoming processes the failed processor are automatically rescheduled by a certain policy in which we determine to buffer them in the current node or to transfer them to another underloaded node considering criticality and service time of the fault. The proposed load balancing algorthm enhances Soh's model(ESM). Our algorithm eliminates the problems of conventional algorithm which has load tables in each processor. This model provided us with several advantages such as reliability, availability and fault-tolerance.

발파진동 제어에 의한 특수구간 터널굴착에 관한 연구

최형빈,임한욱 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.A

It was difficult to apply conventional excavation methods in some sections from Seoul to Pusan high speed rail road construction of 1 lot 2, due to highway concrete road. gas pipe, water pipe and nearby factories with automatic control system machine. To excavate safely and efficiently in these sections new blast patterns were employed within allowable blast vibration level, by test blast and controlled vibration by sequential blast. Behaviors of the rock mass including convergence and displacement around tunnel were measured with construction works and the crack width in concrete wall also monitored for controlling allowable limits. The results can be summarized as follow : 1. The allowable blast vibration level in structure site is less 1.0cm/sec for highway concrete, 0.5 cm/sec for gas pipe, water pipe and building housing and 0.3 cm/sec for automatic control system machine. 2. The convergence displacement, sing rod extensometer and multi rod extensometer around tunnel and cracks in concrete wall were measured, it was confirmed that the measured values were converged within allowable level. 3. The empirical formular of ground vibrations with 90% confidence lines for PD-3 was given as follow. V_90%=45.549(??)^-1.353

원자력 사고후 쌀알과 배추내 ^90Sr 및 ^137Cs 농도 예측

최용호,임광묵,황원태,이한수,이창우 대한방사선 방어학회 2002 방사선방어학회지 Vol.27 No.3

원자력 사고후 시간경과에 따른 작물체내 핵종 농도를 보다 현실적으로 예측할 수 있는 방법을 수립하고 단위 건침적에 대하여 백미와 배추내 ^90Sr 및 ^137Cs의 50 년간 농도를 예측하였다. 비생육기 사고의 경우 농도는 두 핵종 모두 시간경과에 따라 서서히 감소하였고 50년 내내 ^90Sr이 ^137Cs보다 높았다. 생육기 사고의 경우 처음 1년간 농도는 비생육기 사고에 비해 대체로 ^90Sr은 최고 30 배, ^137Cs은 최고 1,000 배 정도까지 높았다. 50 년간의 누적농도는 백미에서는 비 생육기 사고의 경우 ^90Sr이, 생육기 사고의 경우 ^137Cs이 더 높았으나 배추에서는 어느 경우에나 ^90Sr이 더 높았다. 생육기 사고시 50년간의 누적농도에 대한 지배적 경로는 대체로 ^90Sr의 경우 뿌리흡수, ^137Cs의 경우 작물체 직접오염이었다. 재부유의 영향은 무시할 수 있을 정도였다. 예측 결과에 입각하여 사고 조건별로 대책의 방향을 제시하였다. A method of more realistically predicting radionuclide concentrations in crop plants varying with time after a nuclear accident was established to estimate 50 years' concentrations of ^90Sr and ^137Cs in polished rice seeds and Chinese cabbage for unit dry deposition. After non-growing season accidents, concentrations of both nuclides decreased gradually with time and ^90Sr concentrations were higher than those of ^137Cs throughout the whole period. Radionuclide concentrations in the 1st year after growing season accidents were on the whole higher than those after non-growing season accidents by factors of up to 30 for ^90Sr and up to 1,000 for ^137Cs. In polished rice seeds, the 50 years-integrated concentration was higher for ^90Sr than for ^137Cs after non-growing season accidents, whereas the opposite was true after growing season accidents. In Chinese cabbage, however, it was higher for ^90Sr than for ^137Cs after both types of the accident. Generally speaking, the dominant pathway for the integrated concentration after the growing season accident was root uptake for ^90Sr and direct plant contamination for ^137Cs. The effect of resuspension was negligible. Based on the predicted results, the direction of planning countermeasures was suggested for various accident conditions.

광산 폐석의 알칼리 반응성에 대한 광물.암석학적 연구

임한욱,최성범,백환조,김덕현 강원대학교 석재복합신소재제품연구센터 1997 석재연 논문집 Vol.2 No.-

석회암을 이용한 골재의 알칼리 반응성을 측정하기 위하여 한국공업규격의 표준시험 방법에 의한 팽창성을 측정하였다. 기존의 연구결과에 의하면 특히 백운석을 포함하는 석회암의 경우 골재-알칼리 반응이 상당한 것으로 알려지고 있으나, 본 연구에 사용된 석회암 시료의 경우는 알칼리 반응성이 매우 작은 것으로 나타났다. 또한, 역학적 특성의 결과도 매우 양호하며 골재로서의 활용성이 충분한 것으로 판단된다. An experimental program was undertaken to investigate the alkali-aggregate reaction of limestone aggregates, following the standard testing method for potential alkali reactivity of carbonate rocks for concrete aggregates. It is generally known tat dolomitic limestones may exhibit high potential of alkali-aggregate reaction. However, the limestone samples employed in this study showed negligible effect of the alkali reaction, even with substantial dolomite content. It is also concluded that the mechanical properties of the limestone aggregates are adaptable for concrete aggregates

유방암과 섬유선종의 방사선학적 소견 : 유방 단순촬영술과 유방 초음파검사 소견의 비교 연구 Studies on mammographic and ultrasonographic findings evaluation

임한혁,최득린,고은석,이혜경,임철완,이상진,홍현숙,최교창,김영화,박재성 순천향의학연구소 1997 Journal of Soonchunhyang Medical Science Vol.3 No.2

Purpose : To evaluate the utility of mammography and ultrasonography in study of morphologic differential diagnosis between malignant and benign mass. Materials and Methods : Average age of patients with breast cancer was 48.4 year-old, and that of fibroadenoma was 29.4 year-old. The equipments used for examination were MF-159 high frequency mammography(Bennet Co.) and Acoustic image 5200S. We evaluated mammographic findings about breast parenchymal pattern, calcification, margin and size of the mass associated tumor nature, and ultrasonographic findings about shape, height and width, internal homogenicity and echo pattern, wall contour, boundary echo, and posterior shadow in breast mass. Thirty-seven of mammographic findings and 34 cases of ultrasonogreaphic findings in pathologically proven breast cancer and 34 case of mammographic findings and 71 cases of ultrasonographic findings in breast fibroadenoma were reviewed retrospectively. Results : In mammographic study, the parenchymal patterns of breast cancer according to Wolfe classification were NI(16.2%), PI(24.3%), P@(37.8%), and DY(21.6%) and those in fibroadenoma were NI(3.1%), Pl(11.7%), P2(35.2%),and DY(50%). Mammographic findings about presence of calcification were as follows; only calcification(16.2%), only mass(51.3%), and mass with calcification(32.5%) in breast cancer, and only mass(91.2%), mass with calcification(8.8%) in fibroadenoma. The features of mass margins were classified as ill-defined margin(45.9%), well-defined(5.4%), and well-defined with partial spiculation(48.6%) in breast cancer and ill-defined(20.5%), well-defined(73.5%), and well-defined with partial spiculation(5.8%) in fibroadenoma. The mass were grouped by size; 1-2cm(37.8%), 2-4cm(45.9%), and 4-6cm(16.3%) in breast cancer and 1-2cm(79.4%), 2-4cm(17.6%), and 4-6cm (3.0%) in fibroadenoma. On ultrasonographic study, the shape of masses in breast cancer were lobulated(82.3%),oval(14.7%), and round(3.0%),and those in fibroadenoma were lobulated(14.0%), oval(57.7%), and round(18.3%). The cases that the height was longer than width were 32.3% in breast cancer and 0% in fibroadenoma. The findings about homogenecity and echo patterns were as follows; hypoechoic(52.9%) and mixed(47.1%) in breast cancer and hypoechoic(2.8%), hypoechoic(63.4%), and mixed(33.8%) in fibroadenoma. The margin of masses were smooth in 85.9% of fibroadenoma, and irregular in 73.6% of breast cancer. The boundary echoes of masses and decreased posterior echo shadow were seen only in 61.8% and 55.9% of breast cancer, respectively. Conclusion: The margin and calcifications are more clearly delineated on mammography but breast cancer and fibroadenoma, both are more commonly developed in dense parenchymal pattern(P2+DY),and there findings are easily obscured in mammography. So ultrasoography is very useful in these masses evaluation, especially amoung young patients.

PWM을 이용한 화재 감지용 자외선 센서의 구동 방법

고낙용,최한수,김광진,임병현 조선대학교 에너지.자원신기술연구소 2004 에너지·자원신기술연구소 논문지 Vol.26 No.1

We propose driving method of Ultraviolet sensor for fire alarms using pulse width modulation that is used to fire detector. Ultraviolet sensor is UV Tron using gas multiplication effect to current discharge and photoelectric effect of metal. To have high sensibility and to gain proper output voltage. it should have highly responsive performance. This research designed a driving circuit with UV sensors and proposed a method for false alarm reduction. The result shows the prevention and extinction of fire technique degree, certificated operation of detector.

후두 및 하인두 편평세포암종에서 E-cadherin의 면역조직화학적 발현

도남용,나한조,이도용,허준,최지윤,이홍영,임성철 조선대학교 2000 The Medical Journal of Chosun University Vol.25 No.2

Background and Objectives : The cell-cell adhesion molecule E-cadherin is necessary for the maintenance of the epithelial cellular structure. We were designed to confirm the significance of E-cadherin as a marker for differentiation and invasiveness of squamous cell carcinoma of the larynx and hypopharynx. Materials and Methods : Our study was investigated for the immunohistochemical expression of the epithelium-specific cell adhesion molecule E-cadherin in formalin fixed paraffin embedded tissue specimen of 32 cases of squamous cell carcinoma of larynx and hypopharynx. Results : The positive expression of E-cadherin was 56.3%(18 cases) in squamous cell carcinoma of the larynx and hypopharynx. Decreased E-cadherin expression was a stastistically significant correlation with a increased grade of lymph node stage and clinical stage. Reduced expression was seen in the large tumor size and poorly differentiated tumors, but these result was not statistically significant. Conclusion : The expression of E-cadherin may be related with progression of squamous cell carcinoma of the larynx and hypopharynx. But these correlation were not sufficient for the prognostic indicators in squamous cell carcinomas of the larynx and hypopharynx.

관상동맥 혈류의 예비력 측정에서 ATP(Adenosine Triphosphate)와 아데노이신의 비교

김원,탁승제,김한수,신준한,조윤경,최옥경,임경수,최병일 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.6