• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2006년도 하계학술발표대회 논문집
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• pp.789-794
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• 2006

The potential impacts of climate change on heating and cooling energy demand were investigated by means of transient building energy simulations and hourly weather data scenarios for Inchon. Future trends for the 21 st century was assessed based oil climate change scenarios with 7 global climate models(GCMs), We constructed hourly weather data from monthly temperatures and total incident solar radiation ($W/m^2$) and then simulated heating and cooling load by Trnsys 16 for Inchon. For 2004-2080, the selected scenarios made by IPCC foresaw a $3.7-5.8^{\circ}C$rise in mean annual air temperature. In 2004-2080, the annual cooling load for a apartment with internal heat gains increased by 75-165% while the heating load fell by 52-71%. Our analysis showed widely varying shifts in future energy demand depending on the season. Heating costs will significantly decrease whereas more expensive electrical energy will be needed of air conditioning during the summer.

• 농업과학연구
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• 제49권4호
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• pp.885-895
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• 2022

Since the supply and demand of agricultural products are unstable, which causes instability in farm income and consumer prices, the government has sought to mitigate the problems caused by unstable supply and demand by generating and providing agricultural outlook information. However, research should be carried out to increase the quality and utilization of agricultural observation information, because the value of agricultural observation information increases only when more users use this information and apply it to their decisions. In this study, a survey was conducted targeting producers and experts who are users or potential users of agricultural outlook information, and the results were analyzed through quantitative model, specifically importance-performance analysis (IPA) and analytic hierarchy process (AHP). The results show that improvement of promptness was required among the seven items evaluated with regard to agricultural outlook. Also, measures for dissemination of agricultural outlook information and the contents of outlook information should be improved to increase its use. If the quality level and use of agricultural observation information are increased by reflecting the results of the above analysis, decision-making on the supply and demand of agricultural products in Korea will be improved, and it is thought that it will be possible to increase farm household income and stabilize consumer prices through stabilization of supply and demand of agricultural products.

• 한국임산에너지학회:학술대회논문집
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• 한국산림바이오에너지학회 2011년도 정기총회 및 학술연구발표회
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• pp.27-30
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• 2011

• 한국임산에너지학회:학술대회논문집
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• 한국산림바이오에너지학회 2011년도 정기총회 및 학술연구발표회
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• pp.31-33
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• 2011

• 한국건설관리학회논문집
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• 제14권5호
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• pp.164-174
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• 2013

우리나라의 모듈러 공법은 컨테이너하우스나 경량스틸 하우스로만 인식되고 있어, 수요창출에 상당한 어려움이 있다. 실제로 모듈러빌딩 활성화에 가장 큰 장애요인은 안정된 수요에 근거한 지속적인 공장 생산이 거의 어렵다는 것이다. 본 연구는 모듈러 공법의 대표적인 미국과 영국의 모듈러 기업의 사례 조사를 통하여, 건물 유형별로 모듈러 공법의 성공요인을 우선적으로 도출하였다. 10개의 건물유형과 9개의 성공요인으로 정리하여 조사한 결과, 주거시설은 공기단축, 설계성능, 경제성 순으로 중요도가 높았으며, 교육시설의 경우에는 공기단축, 친환경성, 경제성, 융통성 순으로 나타났다. 병원시설은 공기단축, 융통성, 경제성, 친환경성이 주요 성공요인으로 나타났으며, 이러한 성공요인들이 확보될 경우 우리나라에서도 모듈러 공법의 성공 가능성은 충분히 있다고 생각된다. 주거시설의 겨우 표준화된 모듈 설계안의 반복적인 활용을 통하여, 성공요인을 확보할 수 있으며, 교육시설의 경우, 단모듈-장모듈의 타입화된 모듈의 설계안을, 병원시설의 경우 증축기술의 개발을 통한 성공요인이 확보할 수 있을 것이다. 모듈러공법의 수요창출 방안을 적용할 수 있는 잠재적인 시장의 규모는 주거시설의 경우, 연간 약 12,000호 규모의 시장이 형성 가능하며 기숙사의 경우, 2012년 1,515억 원 정도의 시장규모를 볼 때, 모듈러 공법의 시장 확보가 충분히 가능하다. 교육시설의 경우, 주거시설보다 평면의 반복정도가 더 높기 때문에 충분한 시장형성이 가능하다. 병원시설의 증축시장은 2012년 1,045억 원 정도의 규모로 모듈러 공법이 적용된 사례가 전무하지만 앞으로의 진출 가능성은 충분하다. 본 연구에서 제안한 건물 유형별 수요창출 방안은 발주자가 공법을 선정할 때, 건물 유형에 맞는 전략을 수립하는 데에 조언으로서 활용할 수 있으며, 잠재적 시장을 파악한 결과 충분한 시장 규모를 확보할 수 있을 것이라고 기대할 수 있다. 또한 모듈러 설계 및 제조업체는 본 연구에서 제안한 방안을 사업전략으로 활용함으로써 전략적으로 건물 유형에 맞는 사업 방향을 설정하여 지속적인 수요창출을 기대할 수 있을 것이라고 생각한다.

• Management Science and Financial Engineering
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• 제14권2호
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• pp.45-66
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• 2008

Refuse collection, one of important elements in reverse logistics, is an activity rendering recyclables or wastes and moving them to some points where further treatment is required. Among various decisions in the collection activity, we focus on network design, which is the problem of locating collection points as well as allocating refuses at demand points to collection points while satisfying the capacity restriction at each collection point. Here, the collection point is the place where recyclables or wastes near the point are gathered, and locating the collection points is done by selecting them from a given set of potential sites. The objective is to minimize the sum of fixed costs to open collection points and transportation costs to move refuses from demand points to collection points. An integer programming model is developed to represent the problem mathematically and due to the complexity of the problem, two types of heuristics, one with simultaneous and the others with separate location and allocation, are suggested. Computational experiments were done on test problems up to 500 potential sites, and the results are reported. In particular, some heuristics gave near optimal solutions for small-size test problems, i.e., 2% gaps in average from the optimal solution values.

• Asian-Australasian Journal of Animal Sciences
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• 제12권3호
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• pp.460-466
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• 1999

The huge amount of demand for feedgrains from this region could not possibly be met by producing countries from the other regions. In order to fulfill this increasing demand for conventional raw materials, an alternative for the conventional raw materials produced in the Asia and Pacific region is becoming increasingly more important. A potential alternative is concentrates or non-conventional concentrates produced locally in relative abundance in this region. These feedstuffs include feed grains, by-products from the milling, sugar industries, brewing and distilling industries. Vegetable, citrus, and animal by-products from abattoir, feather meal and blood meal are also possibilities. In addition to more widespread use of unconventional feed sources, the following approach is recommended to improve utilization and performance. These include establishing the nutritive value of non-conventional feeds, quality control to minimize variability, proper storage and processing to assure the nutritive value and prevent mycotoxin contamination, properly balance amino acids with protein sources, supplementation with synthetic amino acids and the use of enzymes to increase digestibility. Currently, practical applications for these resources in feed formulation are negligible despite the potential. The socio-economic aspects will dominate the use of these non-conventional concentrates. In the future, the feed industry will resolve the problems in using locally available raw feed materials.

• 대한교통학회지
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• 제23권5호
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• pp.65-71
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• 2005

지역유형(area type)은 물류수요의 잠재력(potential)과 밀접한 관련이 있다. 물류계획분야에서 지역유형 변수는 특히 발생모형(generation model)에서 물류유입(freight attraction)을 설명하는 모형변수로, 또한 수송수단선택모형(mode choice model)의 모형변수로 포함되는 것이 최근 선진국의 물류계획 실무분야에서 일반적인 추세이다. 하지만 지역유형은 그 동안 개념적으로 명확히 정의되지 못하였으며, 분석모형의 맥락에서 지역유형의 계량적 추정을 다룬 선행연구는 거의 없었다고 할 수 있다. 이런 이유 때문에 중/장기 물류수요예측 및 물류계획에 있어서 인구와 고용의 변화가 지역유형을 어떻게 변화시킬지에 관한 장기적인 예측을 하는 것이 어려웠다. 따라서 본 연구는 물류시설 SOC사업의 성공적 추진을 위하여 물류수요예측의 신뢰수준을 제고하는 데 있어 꼭 필요하고 시급한 연구로서 지역유형(area type)을 고려한 물류수요의 잠재력(potential)분석 방법을 제시하였다.

• 항공우주산업기술동향
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• 제6권1호
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• pp.124-134
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• 2008

The rising demand for the high efficiency and high covertness in UAV motivates the miniature design of the high performing mission sensors, or payloads. One of the promising payload sensors, EO/IR sensor has evolved satisfying its demands and became the main stand-alone mission sensor for 200kg-range UAV. One aspect in development of EO/IR sensor concerns lack of specification criterions to represent its performance. Even though the high demand and competition among each manufacturer caused EO/IR features subject to rapid change collateral to new technology, the datasheets maintained the conventional outdated formats which leave some of the major components in ambiguity. Making comparisons or predicting actual performance with such datasheets is hardly worthwhile; yet, they could be important reference guide for the potential customers what to expect for the upcoming EO/IR. According to UAS Roadmap 2007-2032 published by DoD, one of the main potential customers as well as a main investor of EO/IR technology, EO/IR is expected to play key roll in solving urgent problems, such as see and avoid system. This paper will examine the recent representative EO/IR specialized in UAS missions through datasheets to find out current trend and eventually extrapolate the possible future trend.

• 경영과학
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• 제26권3호
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• pp.205-221
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• 2009

Countries around the world are actively investing in development and industrial application of RFID, a new wireless communications technology widely perceived as a next-generation growth engine with the potential for creation of new business value. In this paper, we empirically study factors influencing the acceptance of RFID by stage of introduction, to contribute making policies aimed at stimulating demand for this technology and accelerating its penetration. The process of acceptance of RFID was divided, in this paper, into three stages: perception, adoption and implementation, and influence factors, both Internal and external to an organization, drawn from existing literature, are analyzed. A conceptual model comprising internal influence factors, including technical, organization and economic factors, and external factors related to environment and this model was tested through structural equation analysis. To obtain data for empirical analysis, we surveyed public institutions and general companies that are potential users of RFID. The data thus collected were analyzed to determine factors influencing the acceptance of RFID by stage, and practical implications for the RFID promotion policy at the level of demand creation and industrial application were derived from the results of this analysis.