• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
• /
• 2008.10a
• /
• pp.65-67
• /
• 2008

Kyoto Protocol against global warming came into effect in Feb 2005. This paper presents a calculation $CO_2$ emission of D power plant for combusting LNG and heavy oil using the a, b, c coefficients obtained by the performance test. The authors also calculate the breakeven point of the fuel transfer from LNG to Oil considering recent $CO_2$ emission cost.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.18 no.34
• /
• pp.193-204
• /
• 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.

• The Journal of the Korea Contents Association
• /
• v.20 no.3
• /
• pp.179-189
• /
• 2020

This study analyzes the status and results of equity crowdfunding film projects from 2016 to 2018. The film project is conducted in the form of general corporate bonds and participating bonds, and 41.5% of the total bonds were issued, 9.5 billion won. In addition, a t-test analysis of the movie's the breakeven point and audience numbers showed that statistically significant and the average number of audience members was low. Therefore, this study suggests the following for the sustainable growth of the equity crowdfunding film project. Equity crowdfunding brokers should reinforce the review of the possibility of achieving the breakeven point of the film and the factors affecting the box office in the investment manual, and should also actively attract projects on the big films that are likely to be successful. This study is meaningful in that it analyzes the equity crowdfunding film project, which has not yet been widely studied in Korea, and is expected to provide implications in the subsequent research and system improvement process.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.23 no.2
• /
• pp.125-130
• /
• 2009

With respect to the goal of achieving at least 50[%] reduction of global emissions by 2050, the G8 leaders agreed to seek to share and adopt it with all Parties to the UNFCCC in the 34th Group of Eight Summit held in Toyako, Japan in July 2008. Korea is also expected to obey the Kyoto Protocol starting in 2013, which will result in a serious shock especially to the electric power industry. The power plants burning the fossil fuel produce more than 20 percent of national $CO_2$ emission. This paper presents an economic feasibility study on fuel transfer for a thermal power plant considering $CO_2$ emission cost. Calculation of the breakeven point for the fuel transfer from LNG to heavy oil of D power plant is demonstrated using the input-output coefficients obtained by the performance test.

• Korean Journal of Agricultural Science
• /
• v.32 no.2
• /
• pp.127-150
• /
• 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.

• Annual Conference on Human and Language Technology
• /
• 1997.10a
• /
• pp.7-14
• /
• 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
• /
• v.11 no.1
• /
• pp.11-17
• /
• 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
• /
• v.11 no.2
• /
• pp.53-72
• /
• 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
• /
• v.10 no.4
• /
• pp.1471-1479
• /
• 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
• /
• v.12 no.1
• /
• pp.31-38
• /
• 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%.