• 한국농공학회논문집
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• 제46권3호
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• pp.31-42
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• 2004

This research seeks to derive the design rainfalls through the L-moment with the test of homogeneity, independence and outlier of data on annual maximum daily rainfall at 38 rainfall stations in Korea. To select the appropriate distribution of annual maximum daily rainfall data by the rainfall stations, Generalized Extreme Value (GEV), Generalized Logistic (GLO), Generalized Pareto (GPA), Generalized Normal (GNO) and Pearson Type 3 (PT3) probability distributions were applied and their aptness were judged using an L-moment ratio diagram and the Kolmogorov-Smirnov (K-S) test. Parameters of appropriate distributions were estimated from the observed and simulated annual maximum daily rainfall using Monte Carlo techniques. Design rainfalls were finally derived by GEV distribution, which was proved to be more appropriate than the other distributions.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2015년도 학술발표회
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• pp.239-239
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• 2015

This study presents a bivariate extension of the goodness-of-fit measure for regional frequency distributions developed by Hosking and Wallis [1993] for use with the method of L-moments. Utilising the approximate joint normal distribution of the regional L-skewness and L-kurtosis, a graphical representation of the confidence region on the L-moment diagram can be constructed as an ellipsoid. Candidate distributions can then be accepted where the corresponding the oretical relationship between the L-skewness and L-kurtosis intersects the confidence region, and the chosen distribution would be the one that minimises the Mahalanobis distance measure. Based on a set of Monte Carlo simulations it is demonstrated that the new bivariate measure generally selects the true population distribution more frequently than the original method. An R-code implementation of the method is available for download free-of-charge from the GitHub code depository and will be demonstrated on a case study of annual maximum series of peak flow data from a homogeneous region in Italy.

• 조명전기설비학회논문지
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• 제20권4호
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• pp.123-130
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• 2006

국내공항의 경우 전기설비의 중요도에 비해 이에 대한 설계기준이나 표준지침이 제대로 갖추어지지 않아 오늘날 공항의 건설, 공항시설의 확충, 증설시에 체계적이고 표준화된 수 배전설비를 갖추기 어려운 실정이다. 따라서, 본 논문에서는 국내공항을 Code화에 의한 4등급으로 분류하고 수 배전설비에 대한 정의 및 적용범위를 설정한 후 기존 공항의 수 배전설비에 대한 문제점을 분석하고 공항 수 배전설비 제어시스템 기준과 공항 등급별 3단계 방안을 제시하여 공항등급별 표준 단선 결선도를 작성한 다음 단선 결선도에 따른 공항 수 배전설비 시설기준을 제시한다.

• Communications for Statistical Applications and Methods
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• 제25권1호
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• pp.15-27
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• 2018

Parametric method of flood frequency analysis involves fitting of a probability distribution to observed flood data. When record length at a given site is relatively shorter and hard to apply the asymptotic theory, an alternative distribution to the generalized extreme value (GEV) distribution is often used. In this study, we consider the beta-P distribution (BPD) as an alternative to the GEV and other well-known distributions for modeling extreme events of small or moderate samples as well as highly skewed or heavy tailed data. The L-moments ratio diagram shows that special cases of the BPD include the generalized logistic, three-parameter log-normal, and GEV distributions. To estimate the parameters in the distribution, the method of moments, L-moments, and maximum likelihood estimation methods are considered. A Monte-Carlo study is then conducted to compare these three estimation methods. Our result suggests that the L-moments estimator works better than the other estimators for this model of small or moderate samples. Two applications to the annual maximum stream flow of Colorado and the rainfall data from cloud seeding experiments in Southern Florida are reported to show the usefulness of the BPD for modeling hydrologic events. In these examples, BPD turns out to work better than $beta-{\kappa}$, Gumbel, and GEV distributions.

• 한국방재안전학회논문집
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• 제16권1호
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• pp.1-11
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• 2023

방재분야의 최상위 계획인 자연재해저감종합계획은 지방자치단체별 시행하여 현재 2차계획이 수립중이며, 인명 및 재산피해를 최소화 하고자 9개 재해유형별 구조적 대책과 비구조적 대책을 수립하여 10년간 시행하는 계획이다. 구조적대책은 공학적근거와 정략적 분석기법으로 저감대책의 판단기준이 명확한 반면, 비구조적 대책의 판단기준은 미비된 실정이며, 재난 및 안전관리 기본법에서는 2018년 안전취약계층을 포함하였고, 자연재해저감종합계획 세부수립기준의 안전취약계층은 어린이, 노인, 장애인을 포함하여 수립 중이나 지자체의 자료확보 및 DB구축의 미비등 저감대책 수립을 위한 위치도 작성에 어려움을 초래하고 있다. 따라서, 본 연구에서는 안전취약계층의 오픈API 자료를 수집하여 통계지리정보서비스의 통계정보와 GIS를 활용하여 시범지역인 강원도 삼척시의 안전취약계층의 위치도를 작성하였고, 삼척시 근덕면의 집계구 단위 위치도를 작성하였다.

• 한국비블리아학회지
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• 제15권2호
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• pp.49-70
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• 2004

본 연구는 출판미디어의 메타 데이터적 개발과 보급동향을 파악하기 위하여, 종이책과 전자출판물로 나누어서 현황을 지표위주로 분석하였다. 더불어, 현황분석에서 도출되는 문제점을 통해 출판미디어의 데이터 개발과 보급에 어떠한 전망적 시각을 부여할 것인지를 논의한 연구이다. 기존의 종이책과 새로운 전자출판물은 인터넷으로 표방되는 디지털 미디어 시대에 새로운 융합 미디어로 그 범위를 넓혀가고 있다. 수용의 유비쿼터스 실현을 위한 융합미디어로의 변화는 기존의 종이책이 갖는 형질을 물려받는 유전의 속성을 기저로 진화한다는 논거를 통해, 종이책과 전자출판물 그리고 융합미디어로서의 디지털 출판물의 양적 확장의 전망을, 보급에 앞서 해결해야 할 솔루션 문제와 함께 논의하고 있다.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2005년도 학술발표논문집
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• pp.284-287
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• 2005

The objective of this study is to check into variation trends of design rainfall according to change of the number of years for observed data. To make comparative study of the relation between design rainfall and recorded year, this study was used maximum rainfall for 24-hr consecutive duration at Gangneung, Seoul, Incheon, Chupungnyeong, Pohang, Daegu, Jeonju, Ulsan, Gwangju, Busan, Mokpo and Yeosu rainfall stations. The tests for Independence, Homogeneity and detection of outliers were used Wald-Wolfowitz's test, Mann-Whitney's test and Grubbs and Beck test respectively. To select appopriate distribution, the distribution of genaralized pareto(GPA), generalized extreme value(GEV), generalized logistic(GLO), lognormal and pearson type 3 distribution is judged by L-moment ratio diagram and Kolmogorov-Smirnov (K-S) test. Design rainfall was estimated by at-site frequency analysis using L-moments and Generalized extreme value(GEV) distribution according to change of the number of years for observed data. Through the comparative analysis for design rainfall induced by L-moments and GEV distribution, relationship between design rainfall and recorded year is provided.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1994년도 박판성형기술의 진보
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• pp.11-23
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• 1994

Formability of sheet metals can be evaluated using tensile testing. Easily measured tensile properties such as yield strength, tensile strength, elongation, strain hardening exponent, strain rate sensitivity and plastic strain ratio are important parameters to evaluated the sheet formability. This paper briefly explains how these properties are related to deep drawability and stretchability. The plastic anisotropy of sheet metals is usually attributed to the crystallographic texture. However dislocation distribution may influence the anisotropy.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2000년도 가을 학술발표회 논문집
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• pp.593-600
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• 2000

Most of ground investigations can be grasped geological distribution which like rock name, geological structure, soil condition, underwater condition, land slide, ground cave-in, ground collapse by geological survey. But geological survey is limited to part region geological structure, not wide region. Therefore, Image Processing Method must need to grasp wide region geological structure. The object of this research is presented analysis data of geotechnical engineering in first step investigation.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1997년도 춘계학술대회논문집
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• pp.222-225
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• 1997

This paper describes experimental investigation on the forming limit for mash-seam welded sheets. The uniaxial tensile test was conducted to evaluate the mechanical properties of weld bead. Experimental forming limit diagrams were investigated for the different thicknesses and properties of welded sheets.