• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2008년도 추계학술대회 논문집
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• pp.65-67
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• 2008

일본 홋카이도 도야코에서 2008년 7월 열린 주요 8개국(G8) 정상회의에서는 2050년까지 전 세계 온실가스 배출량을 절반으로 줄이는 장기 목표론 추진하기로 했다. 본 논문은 D 발전소의 중유 연소에 따른 비용과 LNG 연소에 따른 비용이 같아지는 ton 당 $CO_2$ 배출비용을 찾고자 한다.

• 산업경영시스템학회지
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• 제18권34호
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• pp.193-204
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• 1995

Many studies show that the value of the warehouse is good. However, studies explicitly mention the tradeoff between costs of operating the warehouse and benefits from the warehouse. Also, it is important to know when the benefits overcome the costs. We study a one-warehouse/N-retailer(s,Q) distribution system with stochastic lead times in order to answer two questions: "What are the optimal policies of the system that minimizes total system costs\ulcorner" and given the optimal policies, "Is the value of the warehouse always good\ulcorner" We use an analytical model for answering the questions. We find that the optimal policies are different from those with deterministic lead times. In fact it is reverse. We alse find the existence of the breakeven point beyond which the benefits starts overcomming the costs. And, we show that one of the breakeven points is the mean ratio of a supplier's lead time to transportation lead time between the warehouse and the retailer. Finally, we show that the breakeven point is sensitive to the ratio of holding costs of the warehouse and the retailer and it is also sensitive to the unit backorder costs at the retailer.sts at the retailer.

• 한국콘텐츠학회논문지
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• 제20권3호
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• pp.179-189
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• 2020

본 연구는 2016~2018년 증권형 크라우드펀딩 영화 프로젝트들의 현황 및 결과를 분석하였다. 영화 프로젝트는 일반회사채와 이익참가부사채의 방식으로 진행되며, 분석기간 동안 전체 채권 중 41.5%인 95억원이 발행되어 비중이 큰 것으로 나타났다. 또한 분석대상 영화의 손익분기점과 관객 수를 t-test한 결과, 통계적으로 유의하며 평균값은 관객 수가 손익분기점 대비 낮은 것으로 나타났다. 따라서 본 연구는 증권형 크라우드펀딩 영화 프로젝트의 지속적 성장을 위해 다음과 같이 제시한다. 중개업자는 영화의 손익분기점 달성 가능성과 투자설명서상 영화 흥행 요소 관련 사항 작성 여부에 대한 검토를 강화해야 하며, 흥행 가능성이 높은 대작 영화들에 대한 프로젝트도 적극 유치할 필요성이 있다. 본 연구는 아직 국내 연구가 많지 않은 증권형 크라우드펀딩 영화 프로젝트에 대해 분석했다는 점에서 의의가 있으며, 후속연구와 제도 개선 과정에서 시사점을 제공할 것으로 기대한다.

• 조명전기설비학회논문지
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• 제23권2호
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• pp.125-130
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• 2009

일본 도야코에서 2008년 7월 열린 G8 정상회의에서 2050년까지 전세계 온실가스 배출량을 절반으로 줄이는 장기 목표를 추진하는 방안이 논의되었다. 우리나라도 2013년부터 기후협약 규제가 거의 확실시되고 있다. 화석연료의 연소로 대부분의 전력을 생산하는 발전산업은 우리나라 $CO_2$ 대기배출량의 20[%] 이상을 차지하고 있다. 발전소의 화석연료의 소모와 이에 따른 $CO_2$ 대기배출 규제는 갈수록 엄격해 질 전망이며 전력생산단가에 크게 영향을 끼칠 것이다. 본 논문은 발전소의 연료교체 검토 시 $CO_2$ 배출비용을 감안하는 간단한 경제성 검토를 수행하였다. 중유전소 발전소인 D 발전소가 LNG로 연료전환을 고려할 경우, 발전비용이 같아지는 ton당 $CO_2$ 배출비용, 즉, LNG-중유 연료교체의 손익분기점에 해당하는 ton당 $CO_2$ 배출비용을 계산하는 방법과 예제를 제시하였다. 이를 위하여 D 발전소의 성능시험 결과 얻어진 입출력 특성계수를 이용하였다.

• 농업과학연구
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• 제32권2호
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• pp.127-150
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• 2005

Under the WTO system, the farm size expansion or the existing korean agricultural structure should be improved to cope with farm income decrease and to continue rice cultivation for food security in the future. This study is aimed at identifying optimum farm size under trade liberalization and import and export parity price system of inputs and outputs. The optimum farm size expressed the minimum point of long run average cost is determined as 15.1ha. The farm size to be equalized as urban laborer's income of 37,361 thousand won per year was revealed 30ha. Therefore the G't recommended farm size of 6ha should be changed to 30ha and the concerned policies for agricultural structure improvement also should be changed to more flexibilitiy.

• 한국정보과학회 언어공학연구회:학술대회논문집(한글 및 한국어 정보처리)
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• 한국정보과학회언어공학연구회 1997년도 제9회 한글 및 한국어 정보처리 학술대회
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• pp.7-14
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• 1997

문서 범주화에서 문서의 내용에 따라 적합한 범주의 종류와 수를 찾는 문제를 해결하기 위해서는 문서 당 하나의 범주를 할당할 경우에 가장 좋은 성능을 보이는 모델이 효과적일 것이다. 그러므로, 본 논문에서는 문서 당 하나의 범주를 할당할 경우에 좋은 결과를 보이는 k-nearest neighbor 방법을 이용한다. 그리고 k-nearest neighbor 방법을 이용한 문서 범주화의 성능을 향상시키기 위해서, 문서 표현에 사용하는 단어들을 범주 자질의 성격을 갖는 단어들로 제한하는 방법을 제안한다. 제안한 방법은 Router 신문 일년치로 구성된 Router-21578 테스트 집합에서 breakeven point 82%라는 좋은 결과를 보였다.

• Industrial Engineering and Management Systems
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• 제11권1호
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• pp.11-17
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• 2012

Along with the recent trend toward increasing variety and shorter life of products in the market, evaluation of risk for economic investment alternatives is of practical importance in manufacturing companies. This paper assumes that each alternative is composed of demand volume and unit sales price as income factors, and unit variable cost and fixed cost as expense factors. The paper assumes that these four factors move worse from the originally expected values, toward the direction of decreasing profit. Values of these four factors are also assumed to fluctuate from year to year over the entire multi-period. By applying the analysis of the breakeven points to each of the four factors, safer area against these changes is represented on the two dimensional domain called normalized total-cost unit-cost domain. A practical numerical example is analyzed to verify the validity of the proposed method.

• Asia Marketing Journal
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• 제11권2호
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• pp.53-72
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• 2009

In the summer of 2008, the movie Dachimawa Lee: Villain, Get on the Express to Hell is waiting for its first release. This movie is based on a short film which was tremendously popular when it was first introduced on the internet in 2000, and the director Ryu Seung Wahn is expecting a mega hit of the movie this summer. Showbox is one of the leading movie distributors in Korea. After a series of blockbuster hits such as Welcome to Dongmakgol, The Host, and The Chaser, Showbox is now in stagnation. Along with sluggish economy in Korea, most of recent movies distributed by them didn't even reach the breakeven. However, expectation on the upcoming movie, Dachimawa Lee, is higher than ever. Marketing department of Showbox has to decide what kind of media channel to choose and which marketing strategy to apply. It needs to make a decision about whether to target the so-called mania group or the general public of much bigger size. In this case study, the distinctiveness of the movie marketing and its process will be discussed. Moreover, the marketing strategies for Dachimawa Lee's success will be examined in the Showbox's point of view.

• Journal of Electrical Engineering and Technology
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• 제10권4호
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• pp.1471-1479
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• 2015

A major portion of the capital costs in the present day power transmission systems are due to the cost of equipment and construction process. Transmission utilities in the recent years are drawing greater attention towards performing life cycle costing studies for cost management and decision making. However, the data involved in these studies are highly uncertain and the effect of these uncertainties cannot be directly included in the study process, resulting in inaccurate solutions. Interval mathematics provides a method for including these uncertainties throughout the cost analysis and provides final solution range in the form of intervals. In this regard, it is essential and extremely important that significant research has to be carried out in understanding the principles of life cycle costing methodology and its applicability to cost analysis of transmission lines along with uncertainties involved in the cost assessment process. In this paper, economic analysis of power transmission lines using interval mathematics has been studied. Life cycle costing studies are performed using net present value analysis on a range transmission lines used in India and the results are analyzed. A cost break even analysis considering right of way costs was carried out to determine the point of economy indifference.

• Journal of Biosystems Engineering
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• 제12권1호
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• pp.31-38
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• 1987

In order to improve the traditional post harvest system in Korea, a model for mechanized rice drying and storage system was developed and introduced as the first part of the study(Park, 1986). As the second part of the study, capital requirement and cost of the model system was analyzed. Also, optimum size of the model system was estimated by comparing with the traditional harvest system. From the study, the following results can be concluded: 1. The capital requirement of the model system decreases as the model size increases. For example, a model system having 500 ton storage capacity requires 439,000 Won/ton. However it requires 313,200 Won/ton only, if the model size increases to 1000 ton. 2. Also, total cost of the model system decreases as the model size increases. For example, total costs of the model system having 500 ton and 1000 ton storage capacity are 101,208 Won/ton and 69,320 Won/ton, respectively. 3. The breakeven point (optimum size) of the model can be estimated around 630 ton storage capacity if the operation rate is assumed as 100%. However, the optimum size of the model is 710 ton, if the operation rate it assumed 80%.