• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.1754-1758
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• 2009

본 연구에서는 개정된 하천법에 의거하여 지방하천들 중에서 국가하천으로 지정하기에 적합한 하천들을 선별하여 이들의 관리등급을 조정하기 위한 방법론을 개발하였다. 대상 하천들 사이의 관리등급조정에 대한 우선순위를 결정하기 위하여 다기준의사결정법을 적용하였다. 개발된 하천평가지수에서는 세부기준을 하천중요도, 하천관리상태, 하천관리능력으로 구분하였으며, 지형 및 수문학적, 사회 및 경제적, 환경적 측면에서 각 세부기준들을 평가할 수 있는 지표들을 선정하였다. 또한, 수자원 분야 전문가들을 대상으로 설문조사를 실시하고 계층적 분석기법을 사용하여 평가기준들과 평가지표들의 상대적 중요도를 결정하였다. 국가하천지정 우선순위는 대상하천의 등급을 8개로 구분하고 각 등급 내에서 하천평가지수의 상대적 크기를 비교하여 결정하였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.7
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• pp.2996-3005
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• 2011

The purpose of this study is to set the Hallabong tangor's quality standards based on consumer preference survey. Until now the Hallabong tangor's quality standards has been based on the fruit size. Hallabong tangor's quality in agricultural cooperative, citrus agricultural cooperative, and some agricultural corporation has been selected in accordance with its own brand of quality grade using a non-destruction sorting machine. But, setting the Hallabong tangor's quality standards has been based on the convenient and routine method rather than the scientific and objective method, consumer's preference. According to the grade contents, more than sugar $13^{\circ}Bx$ and less than acid 1.10% has been used uniformly. Thus, in this study, based on the consumers' preference of Hallabong tangor, 5-level grades of sugar and 7-level grades of acidity were divided into the total 35-level grades. Based on this, 5-level grades were set and were divided into selling product grades(1~3) and non-selling product grades(4~5).

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2004.04a
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• pp.272-276
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• 2004

화강암에 대한 화학적 풍화특성과 풍화 정도의 정량적으로 표현하기 위한 방법으로 조사지역의 지형자료에 기초한 습윤지수(wetness indes)를 산정하였으며, 중화속도 및 등급을 산정하였다. 습윤지수는 지형 고도를 이용하여 2-5m 크기의 격자로 구성 된 수치고도모형을 작성하여 계산하였으며 풍화속도와 등급은 Profile model을 이용하였다. 연구대상지역은 마산지역과 서부산지역으로 집수지형을 지시하는 습윤지수의 분포는 마산지역에서 다소 높은 지수 값을 보인다. 임계부하량(critical loads)에 의한 풍화등급은 마산 가포동 지역과 서부산 견마도 지역은 각각 3등급과 4등급에 해당하여 견마도 일원에서 높은 풍화 정도를 지시한다. 이와 같은 결과는 동일한 화강암 분포지의 경우에도 구성 광물의 비율과 기온과 강수량과 같은 지역적인 특성에 따라 상이한 풍화 경향이 나타남을 지시한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.8
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• pp.3430-3438
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• 2011

The purpose of this study is to set the Korean mandarine quality standards based on consumer preference survey. Until now the Korean mandarine's quality standards has been based on the fruit size. The Korean mandarine's quality in agricultural cooperative, citrus agricultural cooperative federation, and some agricultural corporation has been selected in accordance with its own brand of quality grade using a non-destruction sorting machine. But, setting the Korean mandarine's quality standards has been based on the convenient and routine method rather than the scientific and objective method, consumer's preference. According to the grade contents, the highest grade brand was required more than sugar $12^{\circ}Bx$ and less than acid 1.0% and the following grade brand was required more than sugar $11^{\circ}Bx$ and less than acid 1.0% uniformally. Thus, in this study, based on the consumers' preference of Korean mandarine, 4-level grades of sugar and 4-level grades of acidity were divided into the total 16-level grades. Based on them, 5-level grades were set.

• Journal of radiological science and technology
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• v.36 no.4
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• pp.305-311
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• 2013

The purpose of this study was to evaluate the Pathological Diagnosis associated with pSUV uptake of $^{18}F$-FDG PET/CT. We had enrolled 39 women that underwent $^{18}F$-FDG PET/CT before operative. We evaluated whether there was correlation between the pSUV of $^{18}F$-FDG PET/CT and prognostic factors. As a results, pSUV level increase according to tumor size but pSUV had no significant association with tumor size. pSUV of high histologic grade was higher than low histologic grade, and pSUV showed positive correlations with histologic grade. The ER and PR showed significant negative correlations with the pSUV of $^{18}F$-FDG PET/CT. Therefore, our results demonstrated that an correlation exists between pSUV and prognostic factors such as histologic grade, ER and PR.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.688-692
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• 2009

본 연구는 전국 토양유실분포도와 토양유실위험 등급도를 작성하는 것을 목적으로 하였다. 토양유실분포도는 RUSLE를 이용하였고, 강우-유출 침식성인자(R)는 기상청의 59개 기상관측소의 1977년부터 2006년까지(30년간)의 강우량 자료를 이용하여 산정하였다. 빈도분석은 FARD를 이용하였고, 전국 R인자를 빈도별로 산정하였다. 토양유실량 분석결과 토지피복별로 초지, 나지 밭의 크기 순서로 토양유실이 발생하고, 우리나라 전체 평균은 약 17.2 ton/ha 정도의 토양유실이 발생하는 것으로 분석되었다. 5년빈도 강우특성에서 전체 토양유실량은 15,000여 톤의 토양유실이 발생하는 것으로 나타났으며, 토지피복 구분에서는 논, 산림, 밭작물 재배지역에서 많은 토양유실이 발생하는 것으로 분석되었다. 토양침유실 위험 등급도 작성은 토양유실위험 등급을 5개 등급으로 구분하여 수행하였다. 분석결과 토양유실위험 2등급인 보통지역이 전체 토양유실량 위험지역의 78.2%로 가장 많은 부분을 차지하고 있으며, 심각한 토양유실 위험지역은 분석지역 전체 중에서 약 1.1%인 $1,038km^2$정도인 것으로 분석되었다. 토지피복별로 심각한 토양유실 위험지역은 나지, 초지, 밭작물 재배지역의 순으로 각각 $93.5km^2$, $168.1km^2$, $327.4km^2$ 정도가 심각한 등급의 토양유실 위험 지역으로 분석되었다.

• The Bulletin of The Korean Astronomical Society
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• v.36 no.2
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• pp.119.2-119.2
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• 2011

대 소 마젤란은하는 항성진화 및 은하진화를 연구할 수 있는 가장 중요한 실험실이다. 두 은하는 우리은하에 매우 가깝고, 각크기가 매우 크기 때문에 이들 두 은하에 대한 측광학적 연구는 매우 지엽적이고 단편적으로 이루어졌다. 시상이 매우 좋은 KMTNet의 1호기 (칠레)를 사용하여 대마젤란은하 ($10^{\circ}{\times}10^{\circ}$)와 소마젤란은하 ($5^{\circ}{\times}5^{\circ}$) 영역에 대한 UBVI 및 협대역 $H{\alpha}$, [OIII] $5007{\AA}$ 측광 탐사관측을 통해 다음과 같은 연구를 제안한다. 1. $V{\approx}23$ 등급까지 대 소 마젤란은하 천체들의 측광 자료의 제공 2. 거리를 지시할 수 있는 천체들의 공간적 분포를 통해 3차원 구조 연구 3. 협대역 $H{\alpha}$ 측광을 통해 Herbig Ae/Be 천체들의 분포와 별 탄생 연구 4. 협대역 $H{\alpha}$ 및 O[III] 측광을 통해 행성상성운의 분포와 광도함수 연구 5. 색-등급도 연구를 통해 위치에 따른 별 탄생의 역사 연구 6. 어두운 별들의 공간적 분포를 통해 LMC-SMC, LMC-MWG, SMC-MWG의 상호작용 연구.

• Tunnel and Underground Space
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• v.13 no.2
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• pp.108-116
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• 2003

Measured convergence data of a tunnel were investigated by means of statistical and regression analysis, where the rock mass were mainly composed of andesite and granite. The rock mass around tunnel were classified by RMR method into five different ratings, and then convergence data which belong to individual ratings were statistically processed to find out the appropriate regression equations. Exponential equations were better coincided with measured data than logarithmic equations. As the number of rock mass rating was increased, the magnitude and standard deviation of convergence were increased. Final convergence data were also investigated to study the relevance with both maximum displacement rate and early measured convergence. Some brief results of their relevance are presented. For instance, the regression coefficient between final convergence and maximum displacement rate was turned out to be 0.87 for this studied tunnel.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.23 no.4
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• pp.173-179
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• 2013

Even though a rough diamond shape is irregular and rugged, it is easy to be processed to make gem, shaped facets (table, crown, pavilion and girdle) were precisely treated because they influence on the evaluation of diamond grading. Those specifications suitable for the standard round brilliant cut diamond polishing were investigated and in 95 % statistical confidence interval, standard deviation, mean and acceptable tolerance were examined. According to these variables (size, angle, depth, and thickness) distribution, the frequency analysis of ratings and proportions were compared with each other. The correlation between each variables and the evidence of influence represented in proportion were determined by the regression analysis applying LSM (Least Square Method). In this research, it was recognized that table sizes of the diamond jewels and pavilion depth (in %) influence the rating decision and in particular, the depth of pavilion acting as the main factor of proportions, also plays an important role in optical phenomena.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.2
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• pp.158-167
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• 2017

This paper presents the technology rating methodology that is applicable to defense R&D technology. First, a technology profitability index was developed using multiple regression analysis to forecast the revenue from technology transfer. Secondly, the technology evaluation index was derived using hierarchical analysis with expert opinion. Finally, the weighted average of the technology profitability index and technology evaluation index were calculated to derive the technology rating. This study is significant in that it is first attempt to evaluate defense R&D technology by rating. If the defense R&D technology rating methodology is applied in practice, it can contribute to efficient R&D budget allocation. In addition, it will help in the vitalization of technology transfer in the defense R&D sector.