• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
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• pp.578-578
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• 2002

Thermal infrared imaging is a highly promising technology for condition monitoring and predictive maintenance of electronic, electrical and mechanical elements in nuclear power plants. However, conventional low-cost infrared imaging systems suffer from poor spatial resolution compared to commercial CCD cameras. This paper describes an approach to enhance inspection performances for calandria reactor area of Wolsung nuclear power plant through the technique of superimposing thermal infrared image into real CCD image. In the occurrence of thermal abnormalities on observation points and areas of calandria reactor area, unusual hot image taken from thermal infrared camera is mapped upon real CCD image. The performance of the technique has been evaluated in the experiment carried out at Wolsung nuclear power plant in the overhaul period. The results show that localizations of thermal abnormalities on calandria reactor face can be estimated accurately.

• 수산해양기술연구
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• 제19권1호
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• pp.46-50
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• 1983

A reverse voltage commutating thyristor chopper was described. The chopper consists of commutating capacitor charging circuit and commutating thyristor. By superimposing the charged voltage on capacitor to load voltage. Powerful reverse voltage could be induced on main thyristor cathode. And in that wise the chopping action was performed without all the reactors of the proposed circuit. An energy recovery circuit was employed in the chopper circuit for recovering the energy that was consumed in main thyristor commutation. The operating principles of the chopper circuit was analyzed and experimental results were as following. I) All reactors were eliminated. ii) By applying energy recovery circuit to the chopper, 67% of the consumed energy was recovered to source. iii) Turn off time of the proposed chopper was derived as T=RC ln2.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.35.1-35
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• 2001

The aim of our study is to automatically analyze how textile is woven which has complicated structure, such as textile with multi-layer structure. For this purpose, we propose a method to reconstruct a textile structure of a textile is visualized. Then, the anteroposterior sections of the same yarn on the cross sectional images is associated each other by superimposing them. Therefore, by this method, 3-D information of each yarn is obtained and the 3-D shape of each yarn is independently expressed. In this research, a 3-D reconstruction of a plain weave fabric is performed.

• Journal of Korean Dental Science
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• 제14권1호
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• pp.32-39
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• 2021

'Crossed occlusion' is the condition in which occlusal intercuspation is lost when several teeth on upper and lower jaw remain. This report describes a clinical case in which a patient had two upper-left posterior teeth and two lower-right posterior teeth; typically known as left-right crossed occlusion. Considering the patient's general condition and financial situation, the treatment plan included placement of two implants on each jaw against the remaining teeth using surgical guide. To find out the ideal position of implants, digital diagnostic wax-up was preceded by superimposing the cast and cone beam computed tomography image, which was aided with radiographic stents. The consequent surveyed implant bridge provided stable vertical stop for fabrication of the implant assisted removable partial dentures. The patient was satisfied with the functionality and esthetics of definitive prosthesis.

• 인지과학
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• 제2권2호
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• pp.261-278
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• 1990

주관적 윤곽의 발생이 상향처리 과정에만 의존하지 않고 중첩단서나 선택적 주의와 같은 인지요인에 의한 하향처리 과정에 의해 영향을 받을수 있음을 검증하기 위해 두개의 실험이 수행되었다.첫번째 실험에서는 중첩단서의 효과를 조사학 위해서 중첩되어 있는 세개의 Kanizsa 삼각형의 유도요소에 색정보를 첨가하여 발생시킨 네온색확산 현상이 사용되었다. 서로 다른 두 색으로 이루어진 Kanizsa 삼각형을 피험자에게 제시한 다므 중첩부위의 윤곽표면의 색을 측정했는데,중첩부위가 중첩하는 삼각형의 색으로 지각되는 것이 확인되었다.이런 결과는 중첩단서가 일종의 하행정보로 작용할 수 있음을 의미한다.두번째 실험에서는 선택적 주의의 효과를 알아보기 위해 중첩의 방향이 애매해서 관찰자의 의도에 따라 반전가능한 두개의 Kanizsa사각형을 제시하고 그 중 한 쪽의 사각형에 선택적으로 주의를 기울이도록 한 다음 중첩부위의 색을 측정하였다. 그 결과,중첩부위가 두 사각형 중 선택적 주의를 받은 사각형의 색으로 지각되었는데,이것은 선택적 주위와 같은 인지요인이 주관적 윤곽의 발생과정에 중요하게 영향을 준다는 것을 의미한다.결론적으로 본 연구는 주관적 윤곽의 발생이 상향처리 과정에만 의존하지 않으며,중첩단서나 선택적 주의와 같은 인지요인에 의한 하향처리 과정에 의해서도 예민하게 영향을 받을수 있다는 것을 보여준다.

• 한국식품저장유통학회지
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• 제20권2호
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• pp.257-264
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• 2013

본 연구는 저장성이 낮은 양파를 이용하여 양파의 발효특성을 조사하였다. 양파 발효의 화학적 특성(잔류 당 함량, pH, 산도 및 알콜 함량)과 관능적 특성(색상, 향, 맛 및 전반적인 기호도)은 반응표면분석을 통해 모니터링 되었다. 알콜 함량에 대한 반응표면분석 결과, 회귀식의 $R^2$가 0.9620으로 1% 이내에서 유의성이 인정되었으며, 예측된 정상점은 최대점으로 발효온도 $29.27^{\circ}C$, 발효시간 103.43 hr 및 초기 당도 $27.52^{\circ}Brix$였으며, 최대점까지는 초기 당 함량과 발효시간이 경과할수록 증가하였다. 전반적인 기호도에 대한 회귀식의 $R^2$는 0.9060으로 5% 이내에서 유의성이 인정되었으며, 예측된 정상점은 안장점으로, $39.27^{\circ}C$, 57.28 hr 및 $22.14^{\circ}Brix$의 조건에서 최대값 6.64점으로 예측되었다. 알콜 함량과 전반적인 기호도 모두를 만족시켜 주는 조건을 구하기 위해 반응표면 중 최적 반응표면만을 superimposing 하여 양파 발효주의 최적 발효조건을 설정한 결과, 발효온도 $28{\sim}32^{\circ}C$, 발효시간 80~90 hr 및 초기 당도 $20{\sim}25^{\circ}Brix$로 예측되었다.

• 한국식품과학회지
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• 제45권1호
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• pp.13-19
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• 2013

반응표면분석법을 이용하여 적양배추 종자의 전자선 처리조건과 재배조건에 따른 새싹채소의 이화학적 및 관능적 품질특성을 분석하여 유통에 적합한 최적조건을 모색하였다. 수분함량의 경우 회귀식의 $R^2$가 0.9638이었고 조사선량 및 재배기간에 많은 영향을 받고 있었다. Total phenolics 함량은 회귀식의 $R^2$가 0.9117이었고 조사선량에 많은 영향을 받았으며, carotenoid 함량($R^2$=0.8338)의 경우 조사선량, 재배기간, 저장기간의 순으로 조건 변수의 영향력이 작용하였다. 관능적 품질 역시 전자선 조사선량에 가장 크게 영향을 받아 선량의 증가에 따라 관능평점이 감소하는 경향을 보여주었다. 재배 및 저장조건의 최적화를 위해 total phenolics 함량 및 전반적 기호도를 superimposing한 결과 최적조건은 조사선량 2.2-3.8 kGy, 재배기간 3.0-4.0일 및 저장기간 2.0-3.0일 범위로 예측되었다.

• 건축역사연구
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• 제20권4호
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• pp.115-134
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• 2011

International Competition for Parc de la Villette has evoked the old architectural question that is about the conflict between unchanging architecture and ever changing time. Tschumi and Koolhaas suggested well-known solutions for it, both of which had started from the criticism of general urban design approach that ignored changing factors in time. However, this study argues that the approaches of Tschumi and Koolhaas are even opposite to each other in spite of their common aims. Influenced by deconstructivists' theories, Tschumi tries to generate the 'text' on the surface of la Villette so that the different users of the park can read it differently. The text is built by 'superimposing' different systems such as points, lines, and surfaces. This study criticizes such formalistic approach since such 'forms' do not generate any dialogue with the real users but just stay as a backdrop for irrelevant events. Meanwhile, Koolhaas concentrates on the 'ground-ness' of la Villette. What he deals with is the real ground which embraces all the potentials on it already. His 'bands' express nothing but the metamorphosis of the ground, and the ground generates the 'differences' out of itself by repeating itself ceaselessly. This study tries to clarify all those happenings and meanings by intimate investigation of various drawing works for the la Villette project by Tschumi and Koolhaas.

• 한국약용작물학회지
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• 제24권4호
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• pp.263-270
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• 2016

Background: In this study, microwave extraction was used, which is an effective method to extract useful bioactive substances as it requires low quantities of solvent and short time periods. The aim of this study was to determine the optimal extraction conditions for Agrimonia pilosa Ledeb. Methods and Results: The independent variables were ethanol concentration, microwave power, and extraction time, each of which had five levels. The dependent variables were total polyphenol and total flavonoid content, and DPPH radical scavenging activity. To determine the optimal extraction conditions for bioactive compounds, a response surface methodology was employed. Contour maps were generated from polynomial equations. The optimal conditions were then assumed by superimposing these contour maps. Based on the resulting graph, the optimal microwave extraction conditions for Agrimonia pilosa Ledeb were determined as 42 - 48% ethanol concentration, 240 - 280W microwave power, and 13 - 20 min of extraction time. Conclusions: Ethanol concentration had a significant effect on microwave extraction, in terms of total polyphenol and total flavonoid content, as well as DPPH radical scavenging activity. Microwave power and extraction time influenced the total polyphenol content, but not the total flavonoid content or the DPPH radical scavenging activity.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2005년도 춘계학술발표대회 논문집
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• pp.1-4
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• 2005

A higher order zig-zag shell theory is developed to refine accurately predict deformation and stress of smart shell structures under the mechanical, thermal, and electric loading. The displacement fields through the thickness are constructed by superimposing linear zig-zag field to the smooth globally cubic varying field. Smooth parabolic distribution through the thickness is assumed in the transverse deflection in order to consider transverse normal deformation. The mechanical, thermal, and electric loading is applied in the sinusoidal distribution function in the in-surface direction. Thermal and electric loading is given in the linear variation through the thickness. Especially, in electric loading case, voltage is only applied in piezo-layer. The layer-dependent degrees of freedom of displacement fields are expressed in terms of reference primary degrees of freedom by applying interface continuity conditions as well as bounding surface conditions of transverse shear stresses. In order to obtain accurate transverse shear and normal stresses, integration of equilibrium equation approach is used. The numerical examples of present theory demonstrate the accuracy and efficiency of the proposed theory. The present theory is suitable for the predictions of behaviors of thick smart composite shell under mechanical, thermal, and electric loadings combined.