• 한국환경보건학회지
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• 제47권2호
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• pp.144-154
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• 2021

Objectives: This study was intended to identify hazard contribution by region, media, and chemical by calculating a hazard-based index using pollutant release and transfer register (PRTR) data. Methods: PRTR data for the period 2011 to 2016 was analyzed to examine the regional trends in toxic releases in terms of quantity and to create a corresponding hazard-based index. For the hazard-based index, the Risk-Screening Environmental Indicators (RSEI) Model was used. Results: The results of the trend analysis show that total releases decreased slightly, but health hazard levels increased consistently. According to the outcome of regional contribution analysis of the hazard-based index, Chungcheongnam-do, Jeollabuk-do and Gyeonggi-do Provinces showed a high ratio in the index for air and water release pollutants, while Gyeongsangbuk-do and Gyeongsangnam-do Provinces showed a high ratio in the index of soil release and waste transfer pollutants. Also, as a result of the analysis of the top ranked substances in the hazard-based index, it was found that chromium, cobalt and its compounds, and ethylene oxide contributed greatly to air release substances, while chromium, benzene, and lead and its compounds contributed greatly to water release substances. Conclusion: These results showed considerable disparities between total release and health hazard levels, especially in the analysis of contribution by regions and by chemical substance. Therefore, the hazard-based index should be used both to support a more comprehensive and robust approach to screening of chemicals for environmental health policy and for management.

• 통상정보연구
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• 제9권2호
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• pp.423-439
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• 2007

The purpose of this study was to analyze market competitiveness of Korean and Chinese computer parts industry in the between two countries' market by using Index of Export Bias and Market Comparative Advantage Index. For attaining the purpose of study, we classified the computer parts which exported to the two countries' market and the imported products as the memory devices and input/output peripheral devices. Analyzing period was 2001-2006. The analysis of Korean results of Index of Export Bias indicated that memory devices represented low overall numerical value and the Chinese results of Index of Export Bias indicated that memory devices represented high gradual numerical value. On the other hand, Korean input/output peripheral devices have been increasing steadily for analysis period and China input/output peripheral devices have been decreasing steadily for analysis period. Additional results indicated that the Korean and China computer parts which gained market competitiveness between two countries market were as follows. Korean memory devices have been losing competitiveness in the China market steadily and Chinese memory devices have been acquire competitiveness in the Korean market gradually. In input/output peripheral devices case, Korean products represented powerful competitiveness in the China market and Chinese products have been gaining competitiveness in the Korea market.

• 한국환경복원기술학회지
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• 제24권1호
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• pp.97-110
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• 2021

Vegetation index information is an important figure that is used in many fields such as landscape architecture, urban planning, and environment. Vegetation may vary slightly in vegetation vitality depending on photosynthesis and chlorophyll content. In this study, a range of vegetation worth preserving in the Taehwa River water system was determined, and hyperspectral images of drones were acquired (August, October), and the results were presented through DVI(Normalized Defference Vegetation Index), EVI(Enhanced Vegetation Index), PRI(Photochemical Reflectance Index), ARI (Anthocyanin Reflectance Index) index analysis. In addition, field spectral data and VRS-GPS(Virtual Reference System-GPS) surveys were performed to ensure the quality and location accuracy of the spectral band. As a result of the analysis, NDVI and EVI showed low vegetation vitality in October, -0.165 and -0.085, respectively, and PRI and ARI increased to 0.011 and 7.588 in October, respectively. For general vegetation vitality, it was suggested that NDVI and EVI analysis were effectively performed, and PRI and ARI were thought to be effective in analyzing detailed characteristics of plants by spectral band. It is expected that it can be widely used for park design and landscape information modeling by using drone image information construction and vegetation information.

• 디지털융복합연구
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• 제14권6호
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• pp.157-165
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• 2016

본 연구의 목적은 해운실물경기 지수가 국내 해운선사 주가에 미치는 영향을 분석하는 것이다. 분석에 사용된 변수는 한국 H회사의 주가와 해운실물경기 지수인 BDI(Baltic Dry Index), CCFI(China Containerized Freight Index), HRCI(Howe Robinson Containership Index)다. 분석기간은 2012년부터 2015년이며, 해운선사 주가지수, BDI, CCFI, HRCI의 4년간의 주간 데이터를 활용하였다. VAR 모형을 이용하여 CCFI와 HRCI가 국내해운선사의 주가지수에 미치는 영향을 분석하였고, VECM 모형을이용하여 BDI가 국내해운선사의 주가지수에 미치는 영향을 분석하였다. VAR 모형 분석결과, CCFI, HRCI는 주가지수에 부(-)의 영향을 미치는 것으로 분석되었으며, VECM 모형 분석결과, BDI는 주가지수에 부(-)의 영향을 미치는 것으로 나타났다. 해운실물경기지수에 부의(-) 영향을 받은 국내 해운선사는 해운실물경기지수에 부의(-) 영향을 받은 국내 해운선사는 해운시황에 적절한 대응을 하지 못한 것을 의미한다. 따라서 국내 해운기업은 중장기적인 모니터링을 통해 해운시황에 대처하는 전략이 필요하다.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1989년도 가을 학술발표회 논문집
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• pp.34-39
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• 1989

Recent trends in design standards development have encouraged the use of probabilistic limit sate design concepts. Reliability analysis adopted in those advanced countries have the potentials that they afford for symplifying the design Process arid placing it on a consistent reliability based for various construction materials. This study is proposed in the reliability analysis of plane frame structures using second-order moment method(Level-II they). Lind-Hasofer's minimum distance method is use in the derivation of an mathematical algorithm as well as an determination of Correlation cofficients, reliability index and total reliability index depending on the multiple failure modes. In addition. This study is employed as a practical tool for the approximate reliability analysis. Results of the numerincal analysis showed that the difference between the reliability index of the failure probability of the multiple failure modes and the total reliability index of the failure probability with the simultaneous failure modes deviated nearly 3∼10% depending on tile performance functions.

• 정보기술과데이타베이스저널
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• 제6권2호
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• pp.115-130
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• 1999

The price structure of housing market varies depending upon market price policy rather than low or high price policy because of IMF. The object of this study is to develop an analysis system for analyzing housing market and its demand. The analysis system consists of four major categories: macro index analysis, market decision analysis, housing market analysis, and consumer analysis. We model each category by using a variety of techniques such as generalized linear model, categorical analysis, bubble analysis, drill-down analysis, price sensitivity meter analysis, optimum price index analysis, profit index measurement analysis, correspondence analysis, conjoint analysis, and multidimensional scaling analysis. Seoul apartment data is analyzed to demonstrate the practical usefulness of the system.

• 한국의류산업학회지
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• 제15권6호
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• pp.1010-1017
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• 2013

Current global textiles and fashion industries have gradually shifted focus to high value-added, high sensibility, and multi-functional products based on new human-friendliness and sustainable growth technologies. Textile design CAD systems have been developed in conjunction with computer hardware and software sector advances. This study compares the patterns or images of actual woven fabrics and virtual fabrics prepared with a textile design CAD system. In this study, several weave structures (such as fancy yarn weave and patterns) were prepared with a shuttle loom. The woven textile images were taken using a CCD camera. The same weave structure data and yarn data were fed into a textile design CAD system in order to simulate fabric images as similarly as possible. Similarity Index analysis methods allowed for an analysis of the index between the actual fabric specimen and the simulated image of the corresponding fabric. The results showed that repeated small pattern weaves provide superior similarity index values than those of a fancy yarn weave that indicate some irregularities due to fancy yarn attributes. A Complex Wavelet Structural Similarity(CW-SSIM) index resulted in a better index than other methods such as Multi-Scale(MS) SSIM, and Feature Similarity(FS) SSIM, across fabric specimen images. A correlation analysis of the similarity index based on an image analysis and a similarity evaluation by panel members was also implemented.

• 한국문헌정보학회지
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• 제45권2호
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• pp.119-143
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• 2011

이 연구는 최근 발표된 단일 문헌에 대한 인용 영향력을 측정하는 여러 인용 지수에 대해서 각 지수의 특성과 지수 간 관계를 살펴보는 것을 목적으로 한다. 분석 대상 인용 지수로는 페이지랭크, SCEAS Rank, CCI, f-값, 단일 논문 h-지수의 다섯 가지와 h-지수를 변형한 세 가지 지수를 더하여 8가지를 포함하였다. 우선 단일 문헌에 대한 인용 영향력을 측정하는 다섯 가지 인용지수에 대해서 살펴보고 단일문헌 h-지수를 변형한 단일문헌 $h_S$-지수, h1-지수, $h_S$1-지수의 세 가지를 추가로 제안하였다. 각 인용 지수의 특성을 파악하기 위해서 국내 인용 데이터베이스인 KSCI 데이터베이스를 대상으로 실제 네트워크 인용 지수를 측정해보았다. 상관관계 분석과 군집분석을 수행하여 8가지 인용 지수 사이의 관계를 분석한 결과, 유사한 측정 행태를 보이는 인용 지수 군을 파악할 수 있었다. 또한 인용빈도 요인과 각 인용 지수 간의 상관관계 분석을 통해서 각 지수의 특성을 설명하였다. 마지막으로 인용 지수의 적용을 위한 고려사항과 후속 연구 방향을 제안하였다.

• The Journal of Asian Finance, Economics and Business
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• 제7권11호
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• pp.117-126
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• 2020

This paper is aimed to explore the co-movement capital market in Southeast Asia and analysis the correlation of conventional and Islamic Index in the regional and global equity. This research become necessary to represent the risk on the capital market and measure market performance, as investor considers the volatility before investing. The time series daily data use from April 2012 to April 2020 both conventional and Islamic stock index in Malaysia and Indonesia. This paper examines the dynamics of conditional volatilities and correlations between those markets by using Multivariate Generalized Autoregressive Conditional Heteroscedasticity (MGARCH). Our result shows that conventional or composite index in Malaysia less volatile than Islamic, but on the other hand, both drive correlation movement. The other output captures that Islamic Index in Indonesian capital market more gradual volatilities than the Composite Index that tends to be low in risk so that investors intend to keep the shares. Generally, the result shows a correlation in each country for conventional and the Islamic index. However, Internationally Indonesia and Malaysia composite and Islamic is low correlated. Regionally Indonesia's indices movement looks to be more correlated and it's similar to Malaysian Capital Market counterparts. In the global market distress condition, the diversification portfolio between Indonesia and Malaysia does not give many benefits.

• 정보화정책
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• 제24권1호
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• pp.48-78
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• 2017

본 연구에서는 공공데이터 개방수준에 미치는 요인을 알아보는 것은 물론 사회자본의 조절효과와 매개효과를 알아보기 위해 총 26개국을 대상으로 공공데이터 개방지수인 ODB와 OUR Index에 대한 다중회귀분석 및 경로분석을 진행하였다. 다중회귀분석결과 종속변수 ODB를 기준으로 할 때 독립변수만을 투입한 모델 1에서는 전자정부, SW시장규모, 정부효과성이 유의미한 정적인 영향을 보였다. 독립변수, 조절변수를 투입한 모델 2에서는 전자정부, SW시장규모, 사회자본이 유의미한 정적인 영향을 보였다. 독립변수, 조절변수, 상호작용항이 투입된 모델 3에서는 전자정부, 사회자본이 유의미한 정적인 영향을 보였다. 종속변수 OUR Index를 기준으로 할 때 모델 1, 모델2에서 전자정부만이 유의미한 정적인 영향을 보였다. 독립변수, 조절변수, 상호작용항이 투입된 모델 3에서는 전자정부, SW시장규모${\times}$사회자본이 유의미한 정적인 영향을 보였다. 경로분석에서는 종속변수 ODB의 대안모형에 대해서 정부효과성만이 사회자본과 완전매개효과를 나타냈다.