• Proceedings of the Korean Information Science Society Conference
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• 1999.10b
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• pp.650-652
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• 1999

칼라 프린터 장치에서는 색을 표현할 수 있는 영역이 사용자가 눈으로 색을 인지하는 영역보다 작다. 또한 잉크의 특성 및 프린터 장치의 하드웨어적 특성이 비선형적인 성질을 갖는다. 때문에 원본 이미지를 프린터로 출력하면 원본과는 다른 왜곡된 칼라의 이미지가 출력된다. 그래서 원색을 재현하려는 다양한 방법으로 잉크의 조절, 프린터 장비의 특성화 및 재현 영역 일치화 기법 등이 연구되고 있다. 본 논문에서는 잉크젯 프린터의 K9black) 잉크와 CMY(Cyan, megenta, yellow) 잉크와의 관계를 살펴보고 이 특성을 이용해 검정 잉크를 조절하는 방법인 BPA(Black Printer Algorithm)를 구현하였다. BPA를 사용하면 색조(contrast)의 향상뿐만 아니라 C, M, Y를 K로 대치하기 때문에 경제적인 효과도 기대할 수 있다. 결과에서는 성능 테스트와 성능 향상을 위한 방법에 대해 논의하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2010.10a
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• pp.16-18
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• 2010

현재 우리나라에서 해상 수송은 무역 수 출입의 90%이상을 담당하고 있으며, 지정학적인 측면에서도 많은 중요한 역할을 하고 있다. 해상에서의 교통시스템 기능이 안정적으로 유지되고, 더욱 발전되기 위해서 무엇보다 연안 해역에서의 선박 교통에 대한 정확한 이해가 필요하다. 본 논문에서는 선박별 항적과 같은 선박 교통의 자료들을 기초로 하여, 우리나라의 각 수역별로 선박 흐름을 재현해 보는 연구를 수행하였다. 구체적으로 선박종류 항로특성 실제교통량 등을 해상 교통의 구성요소별로 분류하고, 자동피항 기능을 포함한 다수 선박간의 흐름을 재현하는 프로그램을 개발하였다. 개발된 프로그램은 목포항의 선박교통 자료를 기본으로 시뮬레이션을 실시하여 검증하였다. 또한 개발된 모델을 수역의 교통안전성 예측, 항로내 시설물 설치시 적정성 문제 등에 적용가능한 지를 고려하였다.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.38 no.1
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• pp.103-114
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• 2020

This study was conducted on Yuanming New Garden in China, which re-lighted the previously lost or damaged original space through representation from the perspective of creating traditional landscape. We looked at the composition of this place, the comparison of relevant literature and actual representation, and the characteristics of representation techniques. The results are as follows. First, TYuanming New Garden is a representation space with the motif of Yunamingyuan in Beijing. An advisory group of some 400 related experts discussed the prototype. The historicity of the real space was considered in the representation process. Second, New Yuanmingyuan garden was recreated based on the 'The Forty Scenic Views of Yuanmingyuan', and 31 of the scenic spots were created. The buildings in each precinct had a 1:1 scale response with structures that were previously constructed in Yuanmingyuan, Beijing. New Yuanmingyuan garden's way in which the main landscape is laid out around the Fuhai Lake(福海), which the landscape is drawn appeared was the same as Yuanmingyuan in Beijing. However, some of the facilities were reproduced on the basis of the 'The Forty Scenic Views of Yuanmingyuan', so they turned out to be different from what Yuanminyuan in Beijing looks like today. New Changchunyuan garden was represented around water landscape of the Western Mansins(Xiyang Lou, 西洋樓) area and the Haeakgaegum(海岳開襟), and the buildings and the facilities were reconstructed based on the 'Copper Print of Western Mansins'. Third, Yuanming New Garden made a prototype of the 'The Forty Scenic Views of Yuanmingyuan' and 'Copper Print of Western Mansins' during the process of synchronic changes in the garden. In addition, the original space and the ambiguous original space or exhibition space were clearly identified through the plant. On the other hand, due to the reenactment of buildings, the spatial composition and placeability of the original spaces of Yuanmingyuan garden and Changchunyuan garden in Beijing were not inherited, and the introduction of elements that did not match traditional landscaping spaces, and the introduction of garden elements that were not prototype and other variations for the use of tourism were found to be drawback.

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.93-93
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• 2021

아날로그 기법은 대표적인 일기도분류 기반의 공간상세화 기법으로써 과거 기상 현상이 미래 재현된다는 가정 하에 공간상세화를 수행하는 방법이다. 대규모 공간범위에 대한 아날로그 기법 적용 시에 지역 구분을 기반으로 적용하는 것이 바람직하다고 알려져 있으며, 기상 변수 간의 선형 상관성을 기반으로 지역구분을 수행하는 기법이 제안된 바 있다. 다만 기존 방법은 아날로그 시점을 찾는 범위가 지나치게 넓어지거나, 공간적으로 불연속적인 구간이 발생할 수 있다. 따라서 지역 간 기후변동성이 크고 도서가 다수 위치한 아시아 지역에서는 부적합한 방법이다. 본 연구에서는 아시아 지역에 대해 지역별 기후특성을 반영할 수 있는 아날로그 공간상세화 기법(BCIA)을 제안하고 평가하고자 한다. 본 연구에서는 쾨펜 기후구분과 ETCCDI 지수를 활용하여 기후특성을 고려한 지역구분을 수행하였으며, 이를 기반으로 아날로그 상세화를 수행하고 평가하였다. 평가결과 BCIA는 기존 아날로그 기법에 비해 기후 특성을 재현하는데 효과적인 것으로 나타났으며, 특히 극치 계열의 기후 지수, 강수일수와 관련된 기후 지수의 재현성이 우수한 것을 확인하였다. 본 연구에서는 기존 일부 지역에서만 시도되었던 지역별 아날로그 적용 방법론을 아시아 지역에 맞게 새롭게 제안하였고 이에 대한 활용성을 검증하였다는 점에서 가치가 있다.

• Journal of the Korean Society of Hazard Mitigation
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• v.11 no.2
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• pp.137-146
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• 2011

In this study, annual maximum storm events are evaluated by applying the bivariate extremal distribution. Rainfall quantiles of probabilistic storm event are calculated using OR case joint return period, AND case joint return period and interval conditional joint return period. The difference between each of three joint return periods was explained by the quadrant which shows probability calculation concept in the bivariate frequency analysis. Rainfall quantiles under AND case joint return periods are similar to rainfall depths in the univariate frequency analysis. The probabilistic storm events overcome the primary limitation of conventional univariate frequency analysis. The application of these storm event analysis provides a simple, statistically efficient means of characterizing frequency of extreme storm event.

• Proceedings of the Materials Research Society of Korea Conference
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• 2003.03a
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• pp.178-178
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• 2003

II-Ⅵ족 반도체 중에서 넓은 밴드갭을 가지는 ZnO에 Mn 이온을 doping할 경우 Tc가 상온보다 높을 것이라는 이론적 계산이 2000년 Science에 발표되었다. 이후 ZnO에 전이금속 이온을 doping하여 상온에서도 강자성을 나타내는 자성 반도체 (DMS)를 만들기 위한 연구가 활발히 진행되고 있다. Co-doped ZnO 박막은 PLD로 증착하였을 경우 Tc가 상온보다 높으나 재현성이 낮은 것으로 알려져 있었다. 그러나 최근 sol-gel 방법을 이용하여 Co-doped ZnO 박막을 제조하면 강자기 특성의 재현성을 높일 수 있다는 결과가 보고되었다. 이에 본 연구에서는 sol-gel 방법을 사용하여 여러 조성의 Co-doped ZnO 박막을 합성한 후 이들의 자성 특성을 검토하였다. 이러한 결과를 바탕으로 Co-doped ZnO 박막에서 강자성 발현의 근원을 규명하고자 (ⅰ) 조성에 따른 Co-doped ZnO의 Raman peak과 EXAFS peak의 변화를 측정하여 구조적 특성과 ZnO 내에서의 Co 이온의 상태를 분석하였으며, (ⅱ) Hall 효과 실험으로 carrier density를 측정함으로써 Fermi 준위에서의 파수 벡터의 크기를 산출하고자 하였다.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.17 no.3
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• pp.129-137
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• 2005

In this study, we developed a model to simulate the interaction between sediment and the overlying water. The model deals with water-sediment interaction in terms of the sedimentation of organic detritus from the pelagic zone into the benthic zone and the release of nutrients occurring in the reverse direction. The model was tested and verified by comparing the predicted release rates of phosphorus from the sediment in Osaka Bay with actual observed values. The results accurately reproduced the seasonal change in release rates. The results well represented seasonal change of the release rates. A long-term prediction of water and sediment quality was performed for the period from 1950 to 1999. Nutrient loads from land and the boundary conditions of 3-D baroclinic flows were season-adjusted. The model accurately reproduced the changing trends in phosphorus, nitrogen, and COD concentrations in Osaka Bay over a long period of time.

• Journal of the Society of Naval Architects of Korea
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• v.38 no.2
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• pp.1-9
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• 2001

Based on the linear potential theory with the side wall reflection. the directional spectrum waves are numerically simulated by a source distribution method and these together with long-crested irregular waves are also generated at the towing tank of Pusan National University by considering the transfer function of the wave maker obtained from the regular waves. In the numerical simulation, the characteristics of the directional spreading function are investigated by changing the breadth of the wave-maker unit. the width of the towing tank and the wave period. In the experimental generation, the statistical properties and the power spectrums of the long-crested irregular and directional waves are compared along the towing tank length. The directional spreading functions are also investigated at various positions in the tank.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.31 no.3B
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• pp.277-284
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• 2011

The limitations of existing Markov chain model for reproducing extreme rainfalls are a known problem, and the problems have increased the uncertainties in establishing water resources plans. Especially, it is very difficult to secure reliability of water resources structures because the design rainfall through the existing Markov chain model are significantly underestimated. In this regard, aims of this study were to develop a new daily rainfall simulation model which is able to reproduce both mean and high order moments such as variance and skewness using a piecewise Kernel-Pareto distribution. The proposed methods were applied to summer and fall season rainfall at three stations in Han river watershed in Korea. The proposed Kernel-Pareto distribution based Markov chain model has been shown to perform well at reproducing most of statistics such as mean, standard deviation and skewness while the existing Gamma distribution based Markov chain model generally fails to reproduce high order moments. It was also confirmed that the proposed model can more effectively reproduce low order moments such as mean and median as well as underlying distribution of daily rainfall series by modeling extreme rainfall separately.

• Cartoon and Animation Studies
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• s.29
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• pp.103-128
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• 2012

Study about existence of illusion which human beings feel from imitated image based reality have been continuing by copy theory and conventionalism for a long time. Traditional copy theory which had controlled representation theory from plato have explained illusion by similarity of image and representation objects. According to copy theory, image is natural sign unlike language but the late in the 20th century, conventionalism from N, Goodman insists they are not any special similarity between image and representation objects. They insist image and conventional sign just as language. These opposit theory rearranged conventionalism by the entrance on the cognitive science. The copy theory couldn't explain the problem of representational gap between reality and duplication, but photo media makes new paradigm about theory of the illusion. The problem of representational gap was disappeared by CGI images on the base of digital media. We are exposed exquisite duplication for a example, movie, advertisement, printings. Sometimes duplications are more real than the original works. Digital is a non-material object by 0 and 1. Specially real lighting skill and mechanism are copied perfectly by photon mapping skills and the duplications are produced more real than the original works. By disappearance of representational gap, we need new theory model for explaining of digital illusion and copy theory can be the key.