• Childhood Kidney Diseases
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• 제4권2호
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• pp.154-160
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• 2000

IgA 신병증은 메산지움에 면역글로불린 A가 침착되는 질환으로 소아 연령에서 혈뇨의 흔한 원인 질환이며, 급성 감염후 사구체신염은 IgA 신병증 다음으로 소아 연령에서 흔한 혈뇨의 원인이다. IgA 신병증과 급성 감염후 사구체신염의 병태생리학적 기전은 아직 명확하게 밝혀지지 않고 있다. 그러므로 이 질환들 간의 병태생리학적 연관관계, 즉 연쇄상구균 감염이 IgA 신병증의 유발 혹은 악화 인자가 될 수 있는지, 또는 임상양상과 예후에도 어떤 영향을 미칠 수 있는지에 대해서는 더욱 알려진 것이 없다. 저자들은 임상적 및 병리학적 소견으로 IgA 신병증에 병발한 급성 연쇄상구균 감염후 사구체 신염으로 진단할 수 있는 증례 2례를 경험하였기에 문헌 고찰과 함께 보고하는 바이다.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2000년도 춘계학술발표대회 논문집
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• pp.89-92
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• 2000

In this paper, an effective procedure is presented for the local recovery of displacements and stresses in multilayered composite panels, which incorporate the local refinement using mesh superposition. The mesh superposition method is used to refine the global coarse mesh by superimposing refined mesh to the localized zone of interest without transition zones. The finite element model used is a solid element based on the Hellinger-Reissner variational principle. The a posteriori computation of the through-the-thickness distributions of displacements and stresses is achieved using a predictor-corrector procedure. The procedure utilizes the superconvergent stresses and nodal displacements of the finite element patch. The element patch is generated by locally superimposing a refined local mesh to the coarse global mesh.

• 한국의상디자인학회지
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• 제11권3호
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• pp.17-25
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• 2009

The purpose of this study is to help understanding of abstract patterns and to play a guideline's role in the development of designs and the prediction of trends for present and future fashion designers and textile designers. The summary of this study's results is like followings. Formative characteristics of abstract pattern in 2000's fashion are Impromptu, Anti-mechanism, Superimposing, Disorder. First, Impromptu is rebounce against uniformity, mechanism, man-created beauty Second, Anti-mechanism represents unfinishing, unbalance, inaccuracy and relates with each traditional of nation or ethnic group. Third, Presupposing transparency Superimposing offsets each patterns. So Their images are ambiguity, ununiformity, unequality, incompletion, uncertainty and so on. Fourth, Disorder breaks and ignores physical balance, rule, order and so on. These images represent uncertainty, freedom, naturality. From this result, I can interpret that these images are representing of humanism reacting about uniformity, mechanism, man-created beauty, completeness of modernism since the Industrial Revolution.

• 전자공학회논문지A
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• 제32A권12호
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• pp.55-63
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• 1995

By employing the concept of superimposing the induced current on partial scattere roled as a secondary source, matrix Green's function was derived. The procedure in the way of derivation presented here was based on the equivalence principle and the induction theorem and applying moment methods to the resulting electric field integral equation. As examples, the induced current on scatterers consisted of wire/plate conductor, the input impedance and gain patterns of corner reflector antenna were calculated. And computing times required for solving matrix equation were compared with those of conventional method.

• 한국조경학회지
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• 제24권3호
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• pp.29-41
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• 1996

The purposes of this study were to develope some techniques which can be used in the landscape simulation process using PC based computer grahics. As a result, a couple of utilities were programmed in AutoLISP language. The one(DSLINE.LSP) is to digitize 2-dimensional structuer forms in the interactive mode considering error handling, and the other one (IMPOST.LSP) is for superimposing and visualizing the digitized plan data to 3-dimension solids & surfaces referring to topographic elevations of meshes in digital terrain model. By applying utilities to present site, the followings may be described. 1) The utility DSLINE.LSP for digitizing simplified building structure form were proved to be easy to input data of polygons including orthogonal edges by handling user coordinates system and checking invalid intersection and default colsing. 2) IMPOST.LSP utility for superimposing and visualizing tool were proved to be more complicated and speedy in calculating process compared with a practical application of modeling tool before rendering process in landscape simulation of built environment on topographic relief, on specially mesospace level of assessment.

• 한국디자인학회:학술대회논문집
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• 한국디자인학회 2003년도 봄 학술발표대회논문집
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• pp.86-87
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• 2003

• 한국콘텐츠학회논문지
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• 제18권12호
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• pp.639-645
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• 2018

본 연구의 목적은 3차원 중첩 기술 차이에 따른 디지털 치과용 지대치 인상체 및 경석고 모형의 스캐닝 정밀도를 비교 평가하는 것이다. 상악 제1 소구치 지대치 인상체와 경석고 모형를 제작했다. 청색광 스캐너로 스캔하여 stereolithography (STL)을 얻었다. 지대치 인상체와 경석고 모형에 대하여 스캐너 테이블에서 이동하지 않은 채로 10번의 추가 스캔을 수행하였다. no control과 best-fit-alignment 기술을 사용하여 지대치 인상체와 경석고 모형 스캐닝 데이터를 중첩시킴으로써 10개의 color-difference maps과 root mean square (RMS) 데이터를 얻었다. 서로 간의 그룹 사이에 RMS data를 가지고 독립 t 검정을 수행하였다(${\alpha}=0.05$). 지대치 인상체 스캐닝에 있어서 no control과 best-fit-alignment의 RMS${\pm}$StandardDeviation (SD) 값은 $6.86{\pm}0.94$, $5.04{\pm}0.24$로 나타났고, 경석고 모형 스캐닝에 있어서는 $4.98{\pm}1.16$, $3.39{\pm}0.07$로 나타났으며, 모든 그룹 간에 유의한 차이를 보였다(P<0.001). 본 연구 결과를 통해 best-fit-alignment뿐만 아니라 no control은 디지털 치과캐드캠 연구 분야 및 임상 분야에 활용될 수 있다고 생각한다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2008년도 춘계학술대회논문집
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• pp.468-471
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• 2008

Sound manipulation is to control sound field using multiple sound sources for appropriate purposes. In linear acoustics, a sound can be constructed by superimposing several fundamental sound fields such as a planewave and sphere shape sound field. That is how we manipulate sound field. In this paper, we introduce the theory of sound manipulation and its applications from the examples of the generation of fundamental sound field: a circle, a ring shape sound field and a planewave field.

• International Journal of Automotive Technology
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• 제7권3호
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• pp.315-320
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• 2006

We have developed an active front steering system(AFS) with a planetary gear train, which can vary the steering gear ratio according to the vehicle speed and improve vehicle stability by superimposing steering angle. We conducted vehicle tests showing that co-operated control of AFS with ESP can improve vehicle stability by direct control of tire slip angle and that steering reaction torque during AFS intervention can be compensated by torque compensation using electric power steering.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제50권12호
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• pp.624-630
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• 2001

The trend of the regulations on environmental issues are getting tight. Responding to this trend new technologies such as moving electrodes, wide pitch and pulsed power supply are also introduced in the electrostatic precipitator(EP) systems. The introduction of wide pitch and moving electrodes enhances the system performance of the EPs by improving air-flow and by improving the ash reentrainment on rapping. The power supplies for the EPs developed up to date include thyristor-based dc or intermittent type, SMPS(switching mode power supply) type and the pulsed-power supply type. The use of the pulsed ones is known to improve dust-collecting efficiency of high resistivity ash and reduces back corona occurrence in the collecting plate. There are two kinds of pulsed-power supplies; one with pulsed transformers and the other with direct dc switching devices. The latter uses rotary spark gap switches or semiconductor switches. Both have the merits and demerits: the spark gap switches are simple and robust but has short life time, hence, high maintenance cost, whereas the semiconductor switches have long life time but are costly. In this study, A high voltage power supply with superimposing voltage pulse on dc source was developed for EPs. This study describes circuit topology, operating principle of the scheme, and analysis of experimental results on Dong-Hae Power Plant. The pulsed power supply consists of a variable dc power supply with ratings of 60kV, 800mA and pulse generator which is made of high voltage thyristor-diode switch strings, an LC resonant tank and a blocking inductor. The pulse generator generates variable pulse-voltage up to 70kV using a high frequency resonant inverter with a variable dc source. Two prototypes were built and tested on 250MW DongHae power plant to verify the possibility of the commercial use and the normal operation in the transient states.