• 지역과문화
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• v.7 no.4
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• pp.21-48
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• 2020

The purpose of this study is to analyze how the integrated heritage conservation actually affected the urban economy of historical cities. To this end, this study examined the trends and meanings of an integrated heritage conservation, and a relationship between sustainable urban development and integrated heritage conservation to find out connectivity with urban economy. Before an empirical analysis of domestic policy of integrated conservation of heritage, this study overlooked the system of the preservation and promotion of ancient cities, which can be called integrated heritage conservation system in Korea, and examined how the historic landscape improving project, which is being implemented as part of the policy of the preservation and promotion of ancient cities, actually affected the urban economy. This study empirically identified the impact of the project through a land price analysis of the region. This study focused on analyzing an impact of the project on a price of land in the proximity of subsidized land lot and analyzed the impact through Difference-In-Difference method. In particular, the project effect was analyzed only for the settlement zones among the preservation and promotion zones where the project was carried out, and as a result, it was confirmed that the average price of lands in the proximity of subsidized land increased more over the same period than in the areas where the project was not intensively implemented.

• Journal of the Korean Geotechnical Society
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• v.25 no.12
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• pp.119-130
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• 2009

To measure the soil deformation, two common techniques of the digital image analysis-Particle Image Velocimetry (PIV) and Digital Image Correlation (DIC)-have been used. To generally apply these techniques to the soils, the accuracy of these techniques should be evaluated under various conditions. In this study, the influence factors including the image resolution, the degree of displacement and deformation, the size of pixel subsets, and analysis techniques were analyzed. The deformation of an idealized particle assembly using the discrete element method was measured by the digital image analyses, and then the results were compared with the actual deformations. To conduct the optimal digital image analysis, various factors are systematically analyzed in terms of the degree of the displacement and the deformation.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.745-748
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• 2004

얼굴 이미지의 대부분은 표본의 수보다 특징 변수의 수가 많기 때문에 이러한 점을 고려한 특징 추출 방법이 필요하다. 본 논문에서는 부분 최소제곱법을 이용하여 특징 벡터의 차원을 축소하는 방법을 제안한다. 전통적인 차원 축소 방법인 주성분 분석은 클래스의 정보를 고려하지 않고 최대 변이를 가지는 성분을 추출하기 때문에, 클래스의 구분에 필요한 특징을 필수적으로 추출하지 못한다. 이에 비해, 부분 최소제곱법은 클래스 변수에 대한 정보를 포함하여 성분을 추출한다. 그러므로, 분류를 하는데 있어서는 주성분 분석에 의해 추출된 성분보다는 부분 최소제곱법에 의해 추출된 성분이 보다 더 예측적이다. 맨체스터와 ORL 얼굴 데이터베이스를 이용하여 실험한 결과, 분류와 차원 축소 측면에서 주성분 분석 방법보다는 부분 최소제곱법을 이용한 방법이 그 성능이 우수함을 알 수 있었다.

• The Journal of the Convergence on Culture Technology
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• v.4 no.2
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• pp.1-7
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• 2018

As the living environment is regarded as a key factor that affects the quality of life of the elderly, the necessity for an accurate measurement of depression for the elderly has increased. In order to diagnose accurately, it is crucial to consider variables such as the cognitive characteristics and living conditions. In this study, 301 persons over 65 years old who live in single and couple elderly households over 65 years were surveyed from 1 January 2018 to 2 February to measure the dwelling depression by applying projective images. The correlations between the dwelling depression and projective images are clarified and the reliability of the questionnaire was evaluated. The correlations between the geriatric dwelling depression index(GDDI) and the GDDI based on projective images(GDDI-I) are clarified. The accuracy of the GDDI-I is analyzed. As a result the projective image questionnaire has a correlation with the existing self-report questionnaire. It is hoped that the results will provide a basis for further researches on psychological diagnoses using the projective method.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2009.10a
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• pp.7-10
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• 2009

터널 경계구역 내의 필수 조명기준은 가시기준, 즉 충분한 물체의 대비에 의해 결정된다. 본 연구에서는 터널도로를 대상으로 주간의 터널 입구부의 배경을 디지털 카메라로 측정하고, 그 이미지를 감지대비법의 일종인 광막휘도법(Veiling Luminance Method)과 기존 $20^{\circ}$ 시야의 L20법에 적용하여 터널의 경계부 평균휘도를 산출하였으며, 그 결과를 비교, 분석하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.357-360
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• 2007

초해상도 영상 복원은 저해상도 이미지를 고해상도 이미지로 변환하는 기술이다. 저해상도를 고해상도로 변환 시 정보가 없는 화소에 대한 정확한 화소값을 예측하는 보간법을 이용하게 되며 영상의 스케일링에 따른 앨리어싱 (aliasing) 이 발생하는 문제를 해결해야 한다. 본 논문에서는 Sobel 연산자를 통해 구한 에지 성분의 크기와 방향성을 이용하여, 초해상도 영상의 앨리어싱과 블러링(blurring) 을 줄이는 기법을 제안한다.

• Journal of vocational education research
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• v.36 no.2
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• pp.68-94
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• 2017

The purpose of this study is to provide basic data for the development of school education and employment policy by analyzing the differences between image of meister high school students anticipated by industrial HR managers and image actually perceived. For this, semantic differential method developed by Osgood (1957) was selected as the study tool. To find out images of meister high school students, validity of 50 adjectives suggested by Osgood and 21 additional adjectives used in previous studies was reviewed by 10 experts. Final 20 adjectives were selected by excluding adjectives that fail to satisfy validity of contents. Proportional sampling in metropolitan and non-metropolitan areas was done to select 350 final survey samples. A total of 600 surveys were distributed and 230 were returned. Return rate was 38.3%. The results of this study are as follows. First, image of meister high school students anticipated by industrial HR managers showed average score of 2.49, which indicates a positive image. In addition, factor analysis was performed to classify adjectives into groups, and they were divided into three factors including external factor, way of thinking factor, and internal (personality) factor. Second, image of meister high school students currently perceived by industrial HR managers showed average score of 3.24, which indicates a positive image. Third, image of meister high school students currently perceived by industrial HR managers was not as positive as image they anticipate.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2018.06a
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• pp.63-63
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• 2018

본 연구는 플라즈마 전해 산화 (PEO) 및 RF (Radio Frequency) 스퍼터링을 이용한 2 단계 접근법에 의해 처리 된 MgO / Ni-Cr의 고내식성 이중층 코팅을 제조하기 위해 수행되었다. 이를 위해 $100mA/cm^2$ 교류 조건에서 180 s PEO를 한 후 150W 에서 900s RF 스퍼터링을 수행 하였다. 코팅의 형태는 주사전자현미경(SEM)을 사용하여 관찰되었으며 코팅의 상조성은 X-선 회절(XRD) 및 X-선 광전자 분광법(XPS)을 사용하여 분석하였다. SEM 이미지는 스퍼터링 된 Ni-Cr이 크랙의 대부분과 미세한 미세 공극을 덮어 코팅 결함이 감소함을 보여 주었다. 따라서, 코팅 된 샘플의 거칠기 값은 스퍼터링 공정 후에 감소되었다. 단면 이미지로부터, 스퍼터링된 코팅층은 낮은 두께 때문에 거의 검출되지 않았다. EDS, XRD 및 XPS를 사용한 조성 분석은 금속 상태의 형태로 Ni 및 Cr 존재를 나타내었고 XPS에서 NiCr2O4 부동태 피막이 검출되었다. MgO / Ni-Cr 이중층 코팅의 내부식성은 MgO / Ni-Cr 이중층을 가진 샘플의 금속 원소와 비교하여 우수한 부식 특성을 나타내는 전위 역학적 분극 시험 및 전기 화학적 임피던스 분광법으로 평가 하였다.

• Korean Journal of Optics and Photonics
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• v.31 no.5
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• pp.205-212
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• 2020

In the performance of a wind turbine system, the blades play a vital role. However, they are susceptible to damage arising from complex and irregular loading (which may even cause catastrophic collapse), and they are expensive to maintain. Therefore, it is very important both to find defects after blade manufacturing is completed and to find damage after the blade is used for a certain period of time. This study provides a new perspective for the detection of internal defects in glass-fiber- and carbon-fiber-reinforced panels, which are used as the main materials in wind turbine blades. A gap or fracture between fiber-reinforced materials, which may occur during blade manufacturing or operation, is simulated by drilling a hole 5 mm in diameter in the middle layer of the laminated material. Then, a digital-image-correlation (DIC) method is used to detect internal defects in the blade. Tensile load is applied to the fabricated specimen using a tensile tester, and the generated changes are recorded and analyzed with the DIC system. In the glass-fiber-reinforced laminated specimen, internal defects were detected from a strain value of 5% until the end of the experiment, while in the case of the carbon-fiber-reinforced laminated specimen, internal defects were detected from 1% onward. It was proved using the DIC system that the defect was detected as a certain level of strain difference developed around the internal defects, according to the material properties.

• Journal of the Korea Convergence Society
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• v.9 no.12
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• pp.151-157
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• 2018

The purpose of this study was to analyze the relationship among self-image congruity, affect, brand attitude and purchase intention toward sports brands. In order to achieve the purpose of this study, totalling 329 students were recruited from several different university. Data were collected by using convenience sampling method. Research model and hypothesis testing were conducted by using SEM(structural equation modeling) through AMOS 18.0. The result were as follows; First, sports brand ideal self-image positively influenced on brand affect. Second, brand affect had significantly effect brand attitude and purchase intention. Third, brand attitude positively influenced purchase intention toward sports brands. The finding s also revealed effect of ideal self-image congruity in there relationships between self-image and brand affect.