• Title/Summary/Keyword: Emperical

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Correlation Analysis Between Precipitation and Climate Index Using EMD in Korea (EMD를 활용한 우리나라 강수와 기상인자간의 상관관계 분석)

  • Choi, Wonyoung;Jung, Jin-Seok;Um, Myoung-Jin;Heo, Jun-Haeng
    • Proceedings of the Korea Water Resources Association Conference
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    • 2015.05a
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    • pp.153-153
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    • 2015
  • 최근 지구온난화와 같은 기후변화로 인한 기상이변으로 홍수, 태풍 등이 빈번히 발생하면서 지면서 그로 인한 피해도 점점 증가하고 있으며, 이러한 기상 이변으로 인한 피해를 최소화 하기 위하여 기후변화가 수문량에 미치는 영향에 대한 연구가 활발히 진행되고 있다. 그 중, 기후변화로 인한 강수현상의 변화를 분석하기 위한 방법 중 하나로 강수 현상이 주변 기후 요소의 분포에 영향을 받으며, 이를 바탕으로 강수현상에 영향을 미치는 기상인자를 통하여 강수를 분석하는 방법이 있다. 동으로는 태평양을 마주한 아시아 대륙 끝에 위치한 우리나라의 지형적 특성상, 강수 현상에 있어 대륙과 해양의 영향을 모두 받은 위치에 있다. 따라서 우리나라의 강수현상에 영향을 미치는 기상인자를 분석할 경우 대륙에서의 기상변화를 반영한 기상인자와 더불어 태평양에서의 기상변화를 반영한 모든 기상인자를 적용할 필요가 있다고 판단되어 본 연구를 수행하였다. 본 연구에서는 우리나라 자료기간이 30년 이상인 주요 지점의 강수량 자료를 바탕으로 Empirical Mode Decomposition(EMD)을 이용하여 과거의 기후변화에 따른 강수량 변동성과 경향성에 대하여 분석하고, 이를 다양한 기상인자와의 지연상관관계를 분석함으로써, 기후변화에 따른 우리나라 강수량의 변동이 어느 요소에 민감한지를 판단해 보고, 상관관계가 높은 지연개월 수를 판단하여기상인자를 통한 강수량의 예측 가능성을 제시 하고자 한다.

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An Emperical Factor Analysis of the Service Economy in India (인도경제의 서비스화 요인 실증분석)

  • Cho, Choong-Jae
    • International Area Studies Review
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    • v.12 no.2
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    • pp.57-78
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    • 2008
  • India has been service-led economic growth during 50 years and turned to the so-called 'service economy' which means that the services sector takes over 50% in GDP since 2000 year. This study aims to find the factors in the existing hypotheses for service economy in India and tries the empirical analysis with the 1953~2003 annual time series data. As a result, the service economy in India has been accelerated by the hypotheses of demand bias, productivity bias and demand increasing of services as the intermediates simultaneously. This implies that the phenomenon of service economy will be continued and furthered in India.

An emperical study on a cause of the gap between technological success rate and commercialization success rate on the government-funded R&D projects of SMEs (정부지원 중소기업 R&D과제의 기술적 성공률과 사업화 성공률 간 격차요인에 관한 실증연구)

  • Yoon, Doh-Keun;Yang, Dong-Woo
    • Journal of Digital Convergence
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    • v.11 no.8
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    • pp.127-141
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    • 2013
  • In this study, we analyzed causal relationships between technology orientation and technological performance, between technological performance and commercialization speed on the government -funded R&D projects in 2009 for searching the cause of the big gap between technological success rate and commercialization success rate. In the result, technology orientation affected negatively on the technological performance, but the technological performance affected positively on the commercialization speed. These results mean that low technology oriented projects are easy to reach the selling step of products faster but they are not easy to attain a balanced income and outgo in contrast to the firms' own R&D. we found it was caused by a defect in the government's R&D support and management system.

A Study on Aesthetic Category of Dress -Selected period of the Renaissance and the Baroque (복식의 미적 범주-르네상스$\cdot$바로크 복식에 적용하여)

  • Choi, Soo-Hyeon;Kim, Min-Ja
    • Journal of the Korean Society of Costume
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    • v.23
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    • pp.197-209
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    • 1994
  • The purpose of this study is to present a way to analyze and review the subjective view of the aesthetic for dress based on the framework of the aesthetic categories suggested by aesthetics. In order to define objectivism and subjectivism of the aesthetic of dress, theoretical studies on the aesthetic categories of dress were precded. And empirical studies on the aethetic categories of dress for selected period, the Renaissance (16th century) and the Baroque(17 th century). The results were follows : The objectivism of the aesthetic is the point of that an object causes human to feel and judge aesthetically, that is that of dress means judge aesthetically, that is that of dress means formal characteristic of dress and pervasive ideology expressed in dress. the subjectivism of the aesthetic is the point that the aesthetic is ruted in human, that is that of dress has been studied in relation to the image, the aesthetic consciousness m, or the aesthetic categories of dress. Especially, the aesthetic category is one of the universal and valid methods for the analysis of subjectivism of the aesthetic for dress. This study includes beauty, grace, elegance , the sublime, the tragic , the comic, aptness, ugliness as aesthetic categories of dress . Beauty is perfection and rule. Grace pleases human by sense. Elegance comes from the harmony of sense and spirit. the sublime comes into existence that human feels pleasure as well as displeasure simultaneously when human is overehelmed by objects. The tragic is the sense of the present of something valuable even if there is suffering. The comic is the sense of the presence of something amusing even if there is displeasure caused by contradiction. Apteness means utility in terms of the objectivism and , formality in terms of the subejctivism. Ugliness is opposite to beauty. As the result of emperical studies, the aesthetic categories of the Renaissance dress showed harmonious, balanced, and symmetrical beauty, and the magnificent, and enlarged sublime. In addition to these , grace and elegance were also found to some extent. Aesthetic categories of the Baroque dress show feminie, soft, cheerful, and fantastic grace, asymmetric , disarmonious, and extraordinary uglinesss, and the magnificient , grave, and dignified sublime.

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Simulation of Two-Phase Fluid Flow in a Single Fracture Surrounding an Underground LPG Storage Cavern: I. Numerical Model Development and Parallel Plate Test (지하 LPG 저장공동에 인접한 단일절리에서의 이상유체거동해석: I. 수치모형의 개발 및 모형실험)

  • Han, Il-Yeong;Seo, Il-Won
    • Journal of Korea Water Resources Association
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    • v.34 no.5
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    • pp.439-448
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    • 2001
  • A two-dimensional finite difference numerical model was developed in order to simulate two-phase fluid flow in a single fracture. In the model, variation of viscosity with pressure and that of relative permeability with water saturation can be treated. For the numerical solution, IMPES method was used, from which the pressure and the saturation of water and gas were computed one by one. Seven cases of model test using parallel plates for a single fracture were performed in order to obtain the characteristic equation of relative permeability which would be used in the numerical model. it was difficult to match the characteristic curves of relative permeability from the model tests with the existing emperical equations, consequently a logistic equation was proposed. As the equation is composed of the parameters involving aperture size, it can be applied to any fracture.

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A Study on the Evaluation of School Health Policy Performance Process of Korea -Focused on the Secondary School in Pusan City- (한국의 학교보건정책집행과정평가 연구 -부산직할시를 중심으로-)

  • 권혁동
    • Health Policy and Management
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    • v.5 no.1
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    • pp.59-79
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    • 1995
  • This study intended to grasp the results of performance of school health policy and to provide information for the future policy performance in Korea. As the objects of the study we chose the secondary school(142 middle schools, 111 high schools) in Pusan, 1993. The contents of the study were about school health service and school health education. For the study we collected datum and took statistics through the existing theses, books, various statistics, and interviews with the persons concerned. Therefore the method of the study was basically emperical and demonstrative. The results of the study can be presented as follows : 1. the results of performance of health service proved to be 5.40% for vaccination against hepatitis B, 5.26% for typhoid fever, 6.65% for EH fever, and 9.84% for influenza in middle schools, In high schools' 5.76% for vaccination against hepatitis B, 0.03% for typhoid fever, 0.25 for EH fever, and 0.86% for influenza. 2. The results of policy performance of health education were found out 64.08% in middle schools, and 17.12% in high schools. 3. The factors which affected the results of performance of health service turned out 1) the improper standard of policy performace that applicants should pay their own expenses. 2) the lack of performer's will to carry out the policy owing to the improper standard. 3) the shortage of interorganizational enforcement activities and communications which influence the will of performance. 4. The affecting factors to the will of performance of health education proved to be 1) the improper standard that nurse-teachers can teach students in the classroom in case of need. 2) the lack of nurse-teachers due to the above inappropriate standard. 3) the lack of enforcement activities of supervising organs which employ and direct nurse-teachers. 4) the lack of activities of organs which should communicate one another and allot nurse-teachers of public schools without fail.

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A Study on the Shoreline Changes By the Geodetic Characteristics of the East Sea and on the Numerical Model for its Predicting (동해안의 측지학적 특성에 의한 해안선 변화와 그의 예측을 위한 수치모델에 관한 연구)

  • 양인태;최한규;김옥남;조기성
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.8 no.2
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    • pp.9-16
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    • 1990
  • This is a geodetic study on the the shoreline changes occurred by the facilities constructed in the beach. There are emperical, hydrological and numerical methods in predicting of the shorline changes. Numerical method is the most suitable method in the field of geodesy. There are many predicting models. This study adopted one-line model because it has a few hydrological factor and simplify the natural phenomena. This study established the ideal seawall boundary condition, applied the explicit model and the implicit model in the Dongsan harbour in East Sea, and could predict the optimum seawall position for protection of shore. The results are following ; Seawall protect shore of which input angle of wave is below 20$^\circ$, a ratio of wave height bleak/line does not effect in shoreline changes. The implicit model is accuracy but can not predict longtime change. But the explicit model is the opposite of the implicit model.

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Analysis on Winter Atmosphereic Variability Related to Arctic Warming (북극 온난화에 따른 겨울철 대기 변동성 분석 연구)

  • Kim, Baek-Min;Jung, Euihyun;Lim, Gyu-Ho;Kim, Hyun-Kyung
    • Atmosphere
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    • v.24 no.2
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    • pp.131-140
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    • 2014
  • The "Barents Oscillation (BO)", first designated by Paul Skeie (2000), is an anomalous recurring atmospheric circulation pattern of high relevance for the climate of the Nordic Seas and Siberia, which is defined as the second Emperical Orthogonal Function (EOF) of monthly winter sea level pressure (SLP) anomalies, where the leading EOF is the Arctic Oscillation (AO). BO, however, did not attracted much interest. In recent two decades, variability of BO tends to increase. In this study, we analyzed the spatio-temporal structures of Atmospheric internal modes such as Arctic Oscillation (AO) and Barents Oscillation (BO) and examined how these are related with Arctic warming in recent decade. We identified various aspects of BO, not dealt in Skeie (2000), such as upper-level circulation and surface characteristics for extended period including recent decade and examined link with other surface variables such as sea-ice and sea surface temperature. From the results, it was shown that the BO showed more regionally confined spatial pattern compared to AO and has intensified during recent decade. The regional dipolelar structure centered at Barents sea and Siberia was revealed in both sea-level pressure and 500 hPa geopotential height. Also, BO showed a stronger link (correlation) with sea-ice and sea surface temperature especially over Barents-Kara seas suggesting it is playing an important role for recent Arctic amplification. BO also showed high correlation with Ural Blocking Index (UBI), which measures seasonal activity of Ural blocking. Since Ural blocking is known as a major component of Eurasian winter monsoon and can be linked to extreme weathers, we suggest deeper understanding of BO can provide a missing link between recent Arctic amplification and increase in extreme weathers in midlatitude in recent decades.

Through SNS Eat Out Select Properties, Customer Satisfaction, Recommendation of Others Affect Relations (SNS를 통한 외식선택속성이, 고객만족도, 타인추천 영향관계)

  • Kim, Geon-Whee;Han, Ji-Soo
    • Culinary science and hospitality research
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    • v.22 no.4
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    • pp.143-155
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    • 2016
  • This study conducted a survey and emperical analysis of SNS based consumer experience visits to eat out companies. A total of 350 questionnaires were collected of which 28 were deemed unreliable, leaving 322 responses to be used in the analysis. SPSS 22.0 was employed to carry out frequency analysis, factor analysis, and reliability analysis, correlation analysis, and regression analysis. First, choose eat out properties multiple regression analysis on the impact on customer satisfaction, overall explanatory power of the regression equation $R^2=.521$ (adjusted $R^2=.515$) and F values were analyzed statistically significant the influence of the positive (+) with 86.325 p=0.000 and the regression equation. Content type pursuit of independent variables (B=0.540, p<0.001), seeking safety type (B=0.292, p<0.001) were significantly appeared showed the influence of the positive (+), Pursuit convenience-type (B=0.071, p<0.001) and the pursuit of dignity type (B=0.002, p<0.001) the sub-showed the influence of (-). Second, the multiple regression analysis on the impact on customer satisfaction to others is recommended explanatory power is $R^2=.539$ (adjusted $R^2=.538$) and F values are analyzed by a statistical regression equation p=0.000 and 374.765 in significance showed that the model fit the regression line. Customer satisfaction is the independent variable was the influence of the positive (+) to (B=0.540, p<0.001).

Analysis of Traffic Accident Reduction Performance of High-quality and Long-life Pavement Marking Materials (고기능·장수명 차선도료의 교통사고 감소효과 분석)

  • Lee, Myunghwan;Choi, Keechoo;Oh, In Seop;Kim, Junghwa
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.35 no.4
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    • pp.921-929
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    • 2015
  • Road conditions which obstruct the driver from seeing road markings, such as in the evening or in the rain, due to the lack of a light source gives way to increasing the risk of traffic accidents. In order to increase road safety, the Korea Expressway Corporation set up a pilot project which used high-quality materials along a section of the Gyeongbu Expressway between Daejeon and Pangyo. There is little research on high-quality materials in the field of pavement marking. This study introduces high-quality materials used in pavement materials, presents the results of a survey conducted to examine the effect of the pilot project and analyzes traffic accident data from before and after the implementation of the pilot project. The survey results show that 87% of the respondents were highly satisfied with the pilot project. With the goal of evaluating the effect of the pilot project, this study used traffic accident data provided by the Korea Expressway Corporation accident data and performed a before-after study of the number of traffic. The results of data analysis show that there were 62 and 48 traffic accidents before and after the implementation of the pilot project. In addition, the result of Emperical Bayes Method indicates that there is an 41.7% decrease in the number of traffic accidents as an effect of High-quality Pavement Marking Materials.