• 한국태양에너지학회 논문집
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• 제35권5호
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• pp.31-38
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• 2015

It is important to improve the energy performance in the industrial sector, and therefore most of the manufacturing companies need the energy performance indicators to identify the target and to verify the energy savings. However, the conventional energy performance indicators such as the total energy consumption and the energy intensity are not proper to use. The reason is that they do not consider adequate relevant variables including productions in the boundary of the manufacturing companies. Therefore, the study provides the advanced energy performance indicator using by the linear regression model according to each energy source to manage the target and to verify the energy performance properly.

• 기술혁신연구
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• 제25권4호
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• pp.263-284
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• 2017

본 연구는 에너지 인력양성사업을 중심으로 국가의 R&D 사업의 성과를 분석하고, 성과지표 개선방안을 찾는 데 주목적이 있다. 주요 분석대상은 2010년 이래 지원된 86개 에너지인력양성사업이다. 에너지인력양성사업의 성과지표는 연구역량이나 배출인원, 산학연계 정도, 고용창출 등과 관련되어 있는데 KPI index로 지칭되는 11개 항목의 인력양성 성과지표를 많이 활용해 분석하였다. 과제별로 제시된 목표치의 달성 수준을 분석한 결과 평균적으로 달성도가 가장 높은 지수는 기업연계율이며, 달성도가 가장 낮은 지수는 참여기업 취업인원인 것으로 나타났다. 기업연계활동의 핵심 고용창출효과를 살펴본 결과 인턴십의 횟수가 많을수록 에너지 분야 고용창출효과가 큰 것으로 나타났으며, 전문가강의의 수가 많을수록 참여기업 취업인원이 증가하는 것으로 나타났다. 이상의 분석결과는 다음과 같은 시사점을 제시하고 있다. 첫째, 사업운영 과정에 대한 지표인 기업연계 활동 자체보다 이를 통해 나타나는 취업 등 핵심 성과에 더 초점을 맞춘 성과지표 재설계와 관리가 필요하다. 둘째, 사업의 질적 성과를 표현할 수 있는 지표와 실제적인 기업연계를 표현할 수 있는 성과지표를 추가하는 방안을 고려할 필요가 있다. 셋째, 정책적 성과목표 및 주요 목표 집단 등에 따라 차별화된 성과관리가 필요하다. 마지막으로 성과지표의 정비와 더불어 정보입력 및 축적 시스템 개선이 필요하다.

• KIEAE Journal
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• 제13권2호
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• pp.123-130
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• 2013

The primary goal of this research is to identify the impacts of window design on the energy use in buildings which takes up about 25% of the total energy consumption. Recently, efficient use of energy is gaining more importance in buildings. Window design, especially being dependent on glazing performance choices, is an important factor for reducing energy consumption in most of the buildings. It also is influenced by the latitude of the site and window orientation. This paper aims at identifying the influence of Window performance indicators(U-value, SHGC), orientation and latitude on the building energy consumption with systematically designed simulations. Comparative study has been performed for five different locations; Greenland, Korea, Singapore, Argentina and Chile along with the different window U-value and SHGC values. The results show that optimum window system with properly coordinated window performance indicators(U-value, SHGC), orientation achieves dramatic reduction of energy consumptions. Windows with low U-value could reduce heating loads and high SHGC could reduce cooling loads. The study also verifies that the windows installed at south facade is more energy efficient in the northern hemisphere while windows facing north is more energy efficient in the southern hemisphere.

• Nuclear Engineering and Technology
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• 제48권1호
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• pp.114-128
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• 2016

The development of operational performance indicators is of utmost importance for nuclear power plants, since they measure, track, and trend plant operation. Leading indicators are ideal for reducing the likelihood of consequential events. This paper describes the operational data analysis of the information contained in the Corrective Action Program. The methodology considers human error and organizational factors because of their large contribution to consequential events. The results include a tool developed from the data to be used for the identification, prediction, and reduction of the likelihood of significant consequential events. This tool is based on the resilience curve that was built from the plant's operational data. The stress is described by the number of unresolved condition reports. The strain is represented by the number of preventive maintenance tasks and other periodic work activities (i.e., baseline activities), as well as, closing open corrective actions assigned to different departments to resolve the condition reports (i.e., corrective action workload). Beyond the identified resilience threshold, the stress exceeds the station's ability to operate successfully and there is an increased likelihood that a consequential event will occur. A performance indicator is proposed to reduce the likelihood of consequential events at nuclear power plants.

• 한국조경학회지
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• 제27권3호
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• pp.69-79
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• 1999

Recently, new concept and paradigm of 'Environmentally-Friendless' is taking a growing interest in environmental planning and design. This study is to develop the new approach of sustainable development, and to establish the indicators for environmentally-friendliness of "Tourism Farms" in rural areas. A questionnaire survey was conducted for deputy manager group and expert group. The environmentally-friendliness of tourism farms is composed of three categories, conservation of global environment(Low Impact), friendliness to surrounding nature(High Contact), and environmental health and amenities (Health '||'&'||' Amenity). Four indicators, such as saving of energy and water resource, reduction and reuse of garbage, natural purification of sewage disposal, and utilization of natural energy, were affecting the first category, i.e., conservation of global environment(Low Impact). And, friendliness to surrounding nature (High Contact) is affected by 3 indicators, such as contact to nature and diverse green areas, water intimate '||'&'||' contact areas, and natural ecology observation by biotope. Finally, the dimension of environmental health and amenity is affected by 3 indicators, such as nature affinity by farming experience, environmental-friendliness of soil '||'&'||' crops by organic farming, campaign and education programs of environmentally-friendliness. From the result of Importance-Performance Analysis(IPA) for 10 indicators, environmentally-friendliness was recommended as 'Concentrate Here'. And, the content validity of 10 indicators for 3 categories was examined by factor analysis. The result showed as the same as hypothetical model, which proved the validity of hypothetical model.

• 한국멀티미디어학회논문지
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• 제19권8호
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• pp.1248-1259
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• 2016

Classification methods based on dual energy X-ray absorptiometry, ultrasonic waves, and quantitative computed tomography have been proposed. Also, a classification method based on machine learning with bone mineral density and structural indicators extracted from the CT images has been proposed. We propose a method which enhances the performance of existing classification method based on bone mineral density and structural indicators by extending structural indicators and using principal component analysis. Experimental result shows that the proposed method in this paper improves the correctness of osteoporosis classification 2.8% with extended structural indicators only and 4.8% with both extended structural indicators and principal component analysis. In addition, this paper proposes a method of automatic phantom analysis needed to convert the CT values to BMD values. While existing method requires manual operation to mark the bone region within the phantom, the proposed method detects the bone region automatically by detecting circles in the CT image. The proposed method and the existing method gave the same conversion formula for converting CT value to bone mineral density.

• 에너지공학
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• 제27권3호
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• pp.28-35
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• 2018

세계 각국에서는 환경오염이나 에너지절감을 위한 방안으로 건축물에 대한 가이드라인과 제도적 지원이 활성화되고 있다. 우리나라에서도 2013.09.01. 개정된 "건축물의 에너지절약 설계기준"에 따라 기준들이 마련되고 신축 건축물에 대한 제로에너지빌딩화가 권장사항에서 의무화과정으로 가고 있다. 그럼에도 불구하고 소형건물에 대한 정부의 구속력은 미비한 실정이다. 이에 최근에 시공한 오피스건물(외단열기법 적용)에 대해 에너지 절감효과를 분석하였고 추가적으로 에너지 절감을 위한 이중외피기법을 제안하였다.

• Membrane and Water Treatment
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• 제8권3호
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• pp.279-292
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• 2017

This study was aimed at ultrafiltration (UF) as a pretreatment before reverse osmosis (RO) within the scheme of hybrid reverse osmosis-multistage flush (RO-MSF) desalination. Seawater at elevated temperature (after MSF heat-exchangers) was used as a feed in this process. The pretreatment system was represented as a set of functionally-linked technological segments such as: UF filtration, backwashing, chemical- enhanced backwashing, cleaning, waste disposal, etc. The process represents the sequences of operating cycles. The cycle, in turn, consists of the following unit operations: filtration, backwashing and chemical-enhanced backwashing (CEB). Quantitative assessment was based on the following indicators: normalized permeability, transmembrane pressure, specific energy and water consumption, specific waste generation. UF pre-treatment is accompanied by the following waste streams: $W1=1.19{\times}10$ power of $-2m^3$ (disposed NaOCl with 0.0044% wt.)/$m^3$ (filtrate); $W2=5.95{\times}10$ power of $-3m^3$ (disposed $H_2SO_4$ with 0.052% wt.)/$m^3$(filtrate); $W3=7.26{\times}10$ power of $-2m^3$ (disposed sea water)/$m^3$ (filtrate). Specific energy consumption is $1.11{\times}10$ power of $-1kWh/m^3$ (filtrate). The indicators evaluated over the cycles with conventional (non-chemical) backwashing were compared with the cycles accompanied by CEB. A positive impact of CEB on performance indicators was demonstrated namely: normalized UF resistance remains unchanged within the regime accompanied by CEB, whereas the lack of CEB results in 30% of its growth. Those quantitative indicators can be incorporated into the target function for solving different optimization problems. They can be used in the software for optimisation of operating regimes or in the synthesis of optimal flow- diagram. The cycle characteristics, process parameters and water quality data are attached.

• 터널과지하공간
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• 제32권4호
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• pp.254-271
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• 2022

본 연구에서는 GMG (Global Mining Guidelines Group)에서 제안한 시간 사용 모델과 핵심성과지표(KPIs)들을 이용하여 트럭 운반작업에 대한 성과를 평가한 결과를 제시하였다. 이를 위해 철과 티탄 철을 주로 생산하는 국내 지하광산을 연구지역으로 선정한 다음 블루투스 비콘과 태블릿 PC를 이용하여 트럭 운반작업 데이터를 수집하였다. 수집된 데이터를 분석하여 트럭 운반작업의 단위작업, 활동 및 이벤트, 소요시간을 식별하였으며, 시간 사용 모델을 기반으로 시간 범주를 분류하였다. 트럭 운반작업의 성과는 가용률, 이용률, 효율성 측면의 9개 성과지표를 이용하여 평가하였다. 그 결과, 가용률 측면에서는 가동시간이 33.9%, 물리적 가용률은 95.7%, 기계적 가용률은 94.9%로 나타났다. 이용률의 경우, 가용장비 이용률은 83.1%, 자산 이용률은 28.1%, 운영 및 유효 이용률은 각각 79.6%, 77.7%로 나타났다. 또한, 효율성 측면에서는 운영 효율성이 97.6%로 높게 나타났으며, 생산 효율성은 49%로 나타났다.

• 에너지공학
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• 제22권2호
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• pp.90-95
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• 2013

기술 중심의 ESCO 전문화를 위한 전문 ESCO 지정제 평가기준 마련이 요청되어 왔다. 이에, 본 연구는 전문 ESCO 지정제도에 관한 평가기준을 설정하기 위해 5가지 목적을 전제하였다. 즉, 에너지 절감의 우수성, 경영지표의 건전성, 고객만족도, 원천기술 보유업체의 참여 유도, 절약성과 보증계약 중시 등이다. 이를 바탕으로 전문가 자문을 통해 전문 ESCO 지정을 위한 평가배점(안)을 전문성(40점), 경영상태(15점), 고객만족도(20점), 기술능력(25점) 등 평가지표로 구성하고, 각각 세부 평가항목의 선정 및 배점기준을 설정하였다. ESCO 업계 설문조사를 통해 비교적 높은 동의율을 보였다. 전문 ESCO 지정제도의 적용 시 기업규모를 중소기업으로 한정하고 적용기술 대상을 조명, 열병합발전, 공정개선, 폐열회수, 냉 난방설비 등 5개의 특정 기술분야로 지정하는 것이 가능할 것이다.