• Magazine of the Korean Society of Agricultural Engineers
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• v.48 no.2
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• pp.9-14
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• 2006

우리나라의 수자원정책이 과거 개발위주의 정책에서 수요관리 중심의 정책으로 전환됨에 따라 제한된 수자원의 효율적인 활용 차원에서 수자원 개발 및 관리계획 수립의 기초정보인 용수이용량 자료의 신뢰성 확보가 중요하게 되었다. 용수 이용량은 생활, 공업, 농업용수로 대별하여 산정하며 이들 중에서 특히 농업용수의 이용량을 상대적으로 산정하기 어렵다. 농업용수 이용량 산정시 고려되는 인자는 자료의 신뢰성이 우선되어야 수자원계획과 관리에 효율적으로 대처할 수 있을 것이다. 따라서 본고에서는 이러한 농업용수 이용량 산정을 위한 조사인자의 획득 방법과 체계를 다룬 "용수이용조사 합리화 방안 연구(3차)" 보고서(2003. 11, 건설교통부)의 내용을 중심으로 정리하였다. 용수이용량 산정을 위한 조사인자는 수자원계획 및 관리차원에서의 활용측면과 대국민 신뢰도 확보 등 홍보효과 측면 등을 감안하여 종합적으로 고려하였으며 용수수요량을 추정할 경우 필요한 인자에 대해서는 "수자원장기종합계획(2001. 7, 건설교통부/한국수자원공사)"에서 제시된 산정방법을 기준으로 하여 결정하였다.

• Journal of Digital Convergence
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• v.10 no.2
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• pp.225-229
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• 2012

A reformer for a small fuel cell system is an apparatus which converts hydrocarbon fuel into hydrogen-rich gas. Among many indices of a reformer, the most crucial index of a reformer is CO concentration in the off-gas out of reformer which must be controled under 5ppm for the efficiency and performance of a system. This paper suggests the criteria of a reformer operation for the stability of a reformer in a fuel cell system by deducing crucial indices and improving processes. The six-sigma technique was applied to verify the optimum control and operation of a reformer of a fuel cell combined heat and power system. The result of temperature control of each parts of a reformer system is the concentration of CO which is the most important factor for the operation of a fuel cell system. The temperature of the parts of a reformer, MTS, LTS and Prox, were controled so that the concentration of CO.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.19 no.1
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• pp.27-37
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• 2001

Soil erosion by outflow of water or rainfall has caused many environmental problems as declining agricultural productivity, damaging pasture and preventing flow of water. As the interest in environment is increasing lately, soil erosion is considered as a serious problem, whereas the systematic regulation and analysis for that have not established yet. This research shows the method of extracting factor entered model which expects soil erosion by GSIS. There are several erosion model such as ANSWER, WEPP, RUSLE. The research used RUSLE erosion model which could expect general soil erosion connected easily with GSIS data. RUSLE's input factors are composed of rainfall runoff factor(R). soil erodibility factor(K), slope length factor(L), slope steepness factor(S), cover management factor(C) and support practice factor(P). The general equation used to extract L, S factor on the RUSLE to be oriented for agricultural area has some limitation to apply whole watershed. So, on this study we used a revised empirical equation applicable to the watershed by grid on the GSIS. Also, we analyzed RUSLE factors by watershed being analyzed with watershed extraction algorithm. Then we could calculate the minimum, maximum. mean and standard deviation of RUSLE factors by watershed.

• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.141-141
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• 2017

본 연구에서는 대하천의 8개의 수질인자(수온, 용존산소, 수소이온농도, 전기전도도, 총질소, 총인, 탁도, 클로로필-a)를 예측할 수 있는 인공신경망모델을 개발하였다. 인공신경망모델(ANN)은 수질데이터가 가지는 불확실성 및 비정상성, 복잡한 상호관련성에 효과적으로 대응할 수 있는 데이터기반 모델이다. 데이터기반 모델의 특성상 예측정확도를 높이기 위해서 양질의 입력데이터를 구성하는 것이 가장 중요하다. 때문에 각각의 수질인자뿐만 아니라 기상학적 인자 또한 예측을 위한 입력자료로 사용하였으며, 요인분석 및 층화표층추출법을 적용하여 입력데이터를 구성하였고 앙상블기법을 이용하여 추가적으로 예측의 정확도를 향상시켰다. 개발된 모델을 이용하여 지천유입이 있는 북한강의 수질자료를 예측한 결과 탁도를 제외한 7개의 수질인자 모두 0.85 이상의 설명력을 보였으며, 실측값과 예보값을 비교해본 결과 평균적으로 10% 미만의 에러값을 나타냈다. 요인분석을 통하여 연관성있는 인자를 입력인자로 추가한 경우 향상된 결과값을 보였주었으며, 앙상블기법을 적용한 결과 정확도 면에서 큰 향상을 보여주었다.

• 건강소식
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• v.24 no.10 s.263
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• pp.26-28
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• 2000

한의학에서 진단은 특정 질병 인자나 질병의 원인을 규명하는 것이 아니라, 환자에 대한 총체적인 묘사에 가깝다. 원인과 결과의 문제보다는 전반적인 유형의 파악이 더 중요한 자리를 차지한다.

• 전기의세계
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• v.29 no.4
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• pp.221-227
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• 1980

본고의 내용은 다음과 같다. 1. 수요예측 2. 설비구성이론 3. 계획수립의 중요인자 4. 설비계획의 최적화 수법 5. 전원개발의 현황과 전망

• Proceedings of the KWS Conference
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• 1999.05a
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• pp.180-182
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• 1999

• The Monthly Diabetes
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• s.151
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• pp.28-29
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• 2002

당뇨병은 당뇨병 자체의 문제뿐 아니라 동맥경화성 심장질환(협심증, 심근경색 등) 및 뇌혈관질환(중풍)을 일으키는 중요한 위험인자가 되므로 그 치료가 중요시되고 있다. 동맥경화성 심장질환과 뇌혈관질환은 우리 나라 뿐 아니라 대부분의 산업화된 현대 사회에서 사망의 가장 중요한 원인으로 꼽히는데 당뇨병뿐 아니라 고혈압, 고지혈증, 흡연 등과도 연관된 것으로 잘 알려져 있다.

• Science of Emotion and Sensibility
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• v.9 no.1
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• pp.27-38
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• 2006

In the planning stage of mobile phone development, one of the most important considerations is to select a FormFactor properly to determine the strategy and Purpose of a Product. Up to now, the FormFactor has been selected only by intuitional and qualitative methods. In this study, the Appraisal Methodology using Sensibility Adjectives of Emotion and Sensibility Engineering was presented to suggest the systematic and rational framework in the field of FormFactor selection. First, we verified the conceptual FormFactors with Axiomatic Design and classified the Sensibility Adjectives into the verified FormFactors. When the FormFactor and classified Design Parameters (DP) were given to a designer, the designer implemented the preliminary designs and they were assessed and analyzed by the survey. With these processes, we were able to select the proper designs for FormFactors which were fit for the purpose of a product. This was caused by connecting the Axiomatic Design and tile Sensibility Adjectives. This study gave the possibilities that can be spread to the selection factors, except for the FormFactor, from now on.

• Korean Journal of Construction Engineering and Management
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• v.7 no.5
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• pp.64-76
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• 2006

Korea's overseas construction industry has been rather depressed by the weakened profitability as well as the sharp decrease of the market shares due to the lack of international competitiveness and the declined international market. There exist a lot of various risks in performing the overseas construction, and especially EPC projects, which entail complicated process from different parts, also require a sophisticated procurement and management skill. Subsequently, to survive in the competitive international market, we need to establish strategies to select potentially profitable projects at the initial stage of bidding process and to mitigate the high degree of risk exposure through contract negotiation and its adjustment. This research discusses the trend of environment in international construction markets. Then, it identifies the key factors that affect the profitability significantly through the structured surveys from 59 actual overseas projects, and it analyzes the key factors by using statistical methods. This research provides the profitability evaluation bases, with which overseas construction participants can forecast and analyze the risk more systematically, by eliciting profit-influencing factors using the result of statistical analysis, literature review and structuring their cause-and-effect relationships. The profitability casual hierarchy structure describes the profitability factors' hierarchy in details and their interrelationships. It also enables us to find out critical factors directly related to profitability aggravation through a qualitative and quantitative analysis. Ultimately, with this hierarchy structure as the base, the research will suggest how to develop the quantitative profitability forecasting model.