• 응용통계연구
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• 제26권6호
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• pp.959-975
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• 2013

Friendly (1992)의 SAS macro faces 프로그램은 다변량 시각화 표현법 중 하나인 체르노프 얼굴 분석을 위한 프로그램이다. 본 연구에서는 faces에서 사용된 18개 얼굴 특징 변수를 살펴보고 현 시대의 흐름에 맞는 좋은 얼굴의 정의에 따라 수정된 프로그램을 제시하였다. 또한 은행의 안정성, 소비자 만족도, 건전성, 수익성을 나타내는 11개 은행경제지표에 기초한 체르노프 얼굴분석을 통하여 국내 15개 은행에 대해 소비자 입장에서 좋은 은행 평가를 수행하였다.

• Steel and Composite Structures
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• 제20권3호
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• pp.719-729
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• 2016

There are great needs of simple but reliable mechanical nonlinear behavior analysis and performance evaluation method for frames constructed by steel and concrete composite beams or columns when the structures subjected extreme loads, such as earthquake loads. This paper describes an approach of simplified macro-modelling for composite frames consisting of steel-concrete composite beams and CFST columns, and presents the performance evaluation procedure based on the pushover nonlinear analysis results. A four-story two-bay composite frame underground is selected as a study case. The establishment of the macro-model of the composite frame is guided by the characterization of nonlinear behaviors of composite structural members. Pushover analysis is conducted to obtain the lateral force versus top displacement curve of the overall structure. The identification method of damage degree of composite frames has been proposed. The damage evolution and development of this composite frame in case study has been analyzed. The failure mode of this composite frame is estimated as that the bottom CFST columns damage substantially resulting in the failure of the bottom story. Finally, the seismic performance of the composite frame with high strength steel is analyzed and compared with the frame with ordinary strength steel, and the result shows that the employment of high strength steel in the steel tube of CFST columns and steel beam of composite beams benefits the lateral resistance and elasticity resuming performance of composite frames.

• 한국환경복원기술학회지
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• 제14권5호
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• pp.81-101
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• 2011

This study was conducted to understand the environmental and ecological function of habitat through evaluation of water environment, soil environment, vegetation characteristics, macro-invertebrate characteristics, and visual habits environment evaluation (SVAP) in Hongdong stream located in Hongseong-Gun, Chungnam Province, and hereafter to utilize the results for the habits reconstruction and improvement project. As the results of water quality analysis, BOD, COD, T-P was almost below the standard quality from upper stream to down stream. The construction of small reservoir, wetland and water purification facility, and the management of non-point pollution are proposed to improve these problems. The soil texture was sandy soil, which is unfitted with vegetation development. The construction of shallows and bogs, and induction of soil sedimentation and biotope formation are proposed to improve these problems. In the plant flora, total 90 kinds were observed with 81 species and nine varieties in total 36 families and 85 genera, and the naturalization rate was higher at down area than upper area. As the results of macro-invertebrate fauna survey, total 26 species and 297 individuals in 20 families and 22 genera were collected. Peltodytes sinensis, Chironomidae sp., and Culicidae sp., which are observed at polluted environment, were collected as dominant species. An appropriate vegetation management party idea is necessary, and it is done an idea in consideration of the soil and a physical characteristic. Visual habits environment evaluation (SVAP) result was mostly determined with below normal (Fair) grade. Pollution source interception, purification pond establishment, and various bog establishment are proposed to improve these problems. With the above results, the ecological environment was determined with bad condition, and the improvement of biotope was urgently needed through sustainable monitoring and management of streams habitat in rural area.

• 펄프종이기술
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• 제31권2호
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• pp.86-91
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• 1999

A new test method has been developed for a quantitative evaluation of macro-stickies in recycled pulps. The method uses a fine slot screen to separate a sticky particles form fiber in the pulp samples. The obtained sticky particles were spread on filter paper and covered with silicon carbide powder in order to make the stickies area with sufficient contrast between stickies and background. The stickies are then counted by a scanner-based image analysis system. The validity of this evaluation method of stickies of KOCC, ONP and white ledger wastepaper recycling plants respectively. It is shown that this method can be applied for a quantitative determination of stickies content in various recycled pulp samples. With this testing method, reproducible and reliable data were obtained for the actual mill pulp samples.

• 디지털융복합연구
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• 제18권4호
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• pp.75-80
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• 2020

본 연구는 중국시장에서 미시 및 거시적 국가이미지가 브랜드태도에 영향을 미치는 영향관계에서 브랜드친숙도, 개방성의 조절효과를 검증하였다. 이를 위해 기존 문헌에 대한 고찰을 바탕으로 거시적 국가이미지의 하위 요인을 경제적 이미지로 사용하였다. 본 연구에서 사용된 연구 방법은 주로 선행 문헌 연구 방법과 실증 연구 방법을 포함하며, 선행연구 이론들을 바탕으로 연구 모형을 수립하고 관련 연구 가설을 설정하는 동시에 중국소비자를 설문 대상으로 선정하여 설문 조사 및 데이터 수집을 실시하고 모형의 적합성 테스트 및 연구 가설에 대해 검증하였다. 본 연구의 결과, 미시적 및 거시적 국가이미지는 브랜드 태도에 정(+)의 영향을 미치고 브랜드 친숙도와 개방성은 미시적 국가이미지에는 조절효과 없는 것으로 분석되었고 거시적 국가이미지(경제이미지)에는 조절효과가 있는 것으로 분석되었다. 본 연구의 결과는 중국시장에서 중국과 밀접한 관계를 맺고 있는 한국, 미국, 일본기업들의 다양한 비즈니스 전략을 활용하는데 시사점을 제공하고 있다.

• 환경영향평가
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• 제15권4호
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• pp.279-288
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• 2006

Saemangeum reclamation project was started in 1991 with the purpose of eco-friendly reclamation, but without clear definition of eco-friendliness. This study was carried out to find out the environmental indicators to define and evaluate the eco-friendliness of Saemangeum project. The methodology to identify the indicators included the analysis of similar reclamation projects, professional discussions, and Delphi survey. The eco-friendly indicators are theoretically based on the five elements of eco-friendliness; 1) resource consumption, 2) energy consumption, 3) pollution emission, 4) bio-diversity, 5) social amenity. The 69 indicators were explained in detail for the convenient use of the indicators by the potential users. The 69 indicators were classified into three categories such as pre-evaluation, process evaluation, and post-evaluation. In terms of spatial consideration, the 69 indicators were classified into two categories such as direct influence area and indirect influence area. Also the 69 indicators were classified into 7 categories: 1) sea, 2) lake, 3) agricultural land use, 4) industrial land use, 5) residential land use, 6) tourism land use, and 7) environmental land use. Twenty core indicators were selected from the 69 indicators by surveying the importance of each indicator. The core indicators are recommended in case of time and budget strain. When there are few quantitative data accumulated for the reclamation project, 5 macro indicators are recommended to be used. Macro indicators are qualitative in nature, and may be used in order to evaluate the overall eco-friendliness of a reclamation project.

• 한국방재학회 논문집
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• 제5권4호
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• pp.71-78
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• 2005

우리나라 도로교설계기준(2005)에서 규정하고 있는 내진설계의 기본개념은 인명피해를 최소화하고 설계지진은 구조물 수명동안 발생할 확률이 거의 없다는 것이다. 구조물 내진설계의 가장 상위개념이며 합리적인 내진대책은 인명피해를 최소화해야하며 경제성이 있어야 한다. 결과적으로 최우선의 목표를 만족시키기 위해서는 개별적인 구조물 중심이 아닌 도시 전체를 대상으로 한 거시적인 평가방안이 필요하다. 도시지역에 대한 피해상황은 기타지역과 다른 양상을 나타내며, 도시가 거대해질수록 구조물의 파손에 의한 손실보다는 오히려 이에 수반되는 부가적인 손실이 월등히 클 것이다. 그리고 거시적인 지진재해 평가방법은 인구와 구조물이 밀집되고, 정치 경제활동 등의 중심이 되는 오래된 도시일수록 효과가 탁월할 것이다. 본 연구는 지진재해위험을 합리적으로 예측할 수 있는 지진재해위험지수를 개발하고, 서울특별시를 6개 구역으로 분할하여 상대적인 지진재해위험을 평가하였다.

• Journal of Korea Trade
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• 제26권6호
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• pp.41-60
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• 2022

Purpose - The policy implications of free trade agreements have traditionally been a matter of debate among economists. The official signing of the Korea-China Free Trade Agreement provides economists with a quasi-natural experiment to analyze the FTA's policy effects. This article aims to more accurately understand the impact of Korea's FTA accession on the macro economy. Design/methodology - This study adopts the counterfactual method based on panel data to find common factors in the generation process of macro data to fit the counterfactual path, to accurately evaluate the effect of the macro policy. Findings - Our research results show that the signing of the Korea-China FTA has a relatively significant short-term positive effect on Korea's economic growth. On average, Korea's real GDP growth rate has increased by 2.1%. This study finds evidence in support of FTA signing not having a significant impact on Korea's GDP growth in the long run. Additionally, we evaluated the impact of the FTA on Korea's imports and exports and found that it had a significant positive impact in the short term, but the trade effect of the FTA is significantly affected by the external macro-environment. Originality/value - First, this study uses macro panel data at the national level to examine the impact of the Korea-China FTA on Korea, and more accurately describes the policy effect of the FTA. Second, our empirical results show that the Korea-China FTA policy impact is subject to occasional changes in the external environment, such as the geopolitical conflict (crisis) between Korea and China, and the US-China trade war. Finally, the analysis shows that the short-term effect of FTA is significant but the long-term is uncertain, which provides empirical evidence for the debate on whether joining FTA can promote national economic growth.

• 펄프종이기술
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• 제34권2호
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• pp.73-83
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• 2002

Gloss is very important optical property influencing the perceived quality of the paper surface as well as the surface after printing. Although the average gloss level of paper products or printed images is important to meet end use specifications, the occurrence of gloss mottle, or non-uniformity of gloss, is often of greater concern for meeting quality requirements, especially for the high gloss paper. Gloss variation originates from the irregularities of paper surface, especially surface roughness of paper. Roughness of paper can be divided into micro-roughness (under $1\mu m$ scale in variation) and macro-roughness (over $1\mu m$ scale in variation) depending on the scale of the irregularities. A clearer understanding of the gloss variation of paper can be achieved by separating the contributions of these two scales of roughness, and characterizing them independently. In order to do this, a novel gloss measuring method was introduced. This can detect local gloss with very high resolution. The effect of macro-roughness on gloss variation, which was identified by the measurable surface topography, was separated from the total gloss variation by using this method. The effect of micro-roughness was then estimated indirectly. The local gloss variations of various paper samples were then evaluated to demonstrate the utility of this approach.

• Structural Engineering and Mechanics
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• 제59권2호
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• pp.291-312
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• 2016

Seismic performance evaluation of shear wall is essential as it is the major lateral load resisting member of a structure. The ultimate load and ultimate drift of the shear wall are the two most important parameters which need to be assessed experimentally and verified analytically. This paper comprises the results of monotonic tests, quasi-static cyclic tests and shake-table tests carried out on a midrise shear wall. The shear wall considered for the study is 1:5 scaled model of the shear wall of the internal structure of a reactor building. The analytical simulation of these tests is carried out using micro and macro modeling of the shear wall. This paper mainly consists of modification in the hysteretic macro model, developed for RC structural walls by Lestuzzi and Badoux in 2003. This modification is made by considering the stiffness degradation effect observed from the tests carried out and this modified model is then used for nonlinear dynamic analysis of the shear wall. The outcome of the paper gives the variation of the capacity, the failure patterns and the performance levels of the shear walls in all three types of tests. The change in the stiffness and the damping of the wall due to increased damage and cracking when subjected to seismic excitation is also highlighted in the paper.