• 대한산업공학회지
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• 제34권2호
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• pp.216-222
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• 2008

The determination of spectrum charges for the operators is a main issue to efficiently manage the limited radio spectrum resources. In this paper, we propose a model to compute the optimal charges for radio spectrum usage. The objective is to determine that will maximize the spectrum charges, and decision variables of ratios for actual or estimated revenues are considered. The spectrum charges are maximized under satisfying the least profit for operators based on Log-Linear demand function. The parameters of actual sales and minimum profit of operators are analyzed to make an efficient management for radio spectrum. The results show that the spectrum charges increase as the actual sales increase, but it decrease as the required minimum profit of operator increases. It is also observed that the government should increase the ratio for estimated sales if anticipating the poor market in the future, otherwise they should increase the ratio for actual sales to maximize the spectrum charges.

• 보건의료산업학회지
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• 제4권1호
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• pp.145-156
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• 2010

The purpose of this study is one of high price medical equipment wished to grasp propriety factor about the MRI introduction, analyzing payability through cost accounting into compensation. It was investigated from January 1 to December 31, 2007 about the MRI of a General Hospital. Expectation availability was 23.2 cases, but actual availability did achievement more than 196.1% with 45.5 items. It is estimated that there are a lot of occurrence cases because great reasons that actual availability increases more than expectation availability is excellent resolving power than a CT, and is device that prefer to reason back that radiation damage is less in person body. The followings show the main results of this study. 1. The MRI was construed in order of cost accounting, wave and personnel expenses 45.4%, administrative expenses 53.0%, and material costs 1.6%. 2. According to CVP (Cost-volume-profit) analysis, BEP (Break Even Point) profit is 173,931,428 won for 11 months, and break even usage number of items are 37.5 cases, and separation usage number of items were confirmed by 1.4 cases. Therefore, was construed that can achieve BEP within 11 months though usage number of items keeps 1.4 items day to create the MRI's hospital operation profit. 3. Estimated limit profitability appears high by 96.7%, exceed fixed charges even if when is non-benefit and when it is benefit consider variable, is judged that the MRI's addition induction helps in hospital management enhancing earning rates.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권12호
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• pp.4950-4966
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• 2015

Cloud providers now face the problem of estimating the amount of computing resources required to satisfy a future workload. In this paper, a virtual machine provisioning (VMP) mechanism is designed to adapt workload fluctuation. The arrival rate of forthcoming jobs is predicted for acquiring the proper service rate by adopting an exponential smoothing (ES) method. The proper service rate is estimated to guarantee the service level agreement (SLA) constraints by using a diffusion approximation statistical model. The VMP problem is formulated as a facility location problem. Furthermore, it is characterized as the maximization of submodular function subject to the matroid constraints. A greedy-based VMP algorithm is designed to obtain the optimal virtual machine provision pattern. Simulation results illustrate that the proposed mechanism could increase the average profit efficiently without incurring significant quality of service (QoS) violations.

• Advances in environmental research
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• 제1권2호
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• pp.125-142
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• 2012

Clean development mechanism (CDM) validity study was conducted to suggest better and more adaptable CDM scenario on water treatment plant (WTP). Potential four scenarios for CDM project; improvement of intake pumping efficiency, hydro power plant construction, solar panel construction and system optimization of mechanical mixing process were evaluated on S-WTP in Korea. Net present value (NPV) of each scenario was estimated based on sensitivity analysis with the variable factors to investigate the CDM validity percentile. Hydro power plant construction was the best option for CDM business with 97.76% validity and $1,127,069 mean profit by 9,813 $tonsCO_2e$/yr reduction. CDM validity on improvement of intake pumping efficiency was 90.2% with $124,305 mean profit by huge amount of $CO_2$ mitigation (10,347 $tonsCO_2e$/yr). System optimization of mechanical mixing process reduced 15% of energy consumption (3,184 $tonsCO_2e$/yr) and its CDM validity and mean profit was 77.25% and $23,942, respectively. Solar panel construction could make the effect of 14,094 $tonsCO_2$ mitigation annually and its CDM validity and mean profit was 64.68% and $228,487, respectively.

• 한국포장학회지
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• 제18권1_2호
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• pp.15-20
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• 2012

쪽파 포장화를 통한 경제성을 분석한 결과는 현재의 산물출하 쪽파를 포장출하로 인한 순수익을 살펴보면, 하절기에는 산물출하 쪽파의 포장화로 인하여 추가로 얻게 되는 수익은 3,471백만원(2007년 생산량 기준)에 이르고, 이로 인하여 추가로 소요되는 비용은 1,926백만원이다. 따라서 하절기 산물출하 쪽파의 포장화로 인한 순수익은 1,545백만원에 이르고 있으며, 이를 kg당으로 환산하면 177.2원, 1단(1.4 kg) 기준으로 환산하면 247.9원 수익성이 제고된다. 동절기에는 산물출하 쪽파의 포장화로 인하여 추가로 얻게되는 수익은 3,083백만원에 이르고 이로 인하여 추가로 소요되는 비용은 1,829백만원에 이른다. 따라서 동절기 산물출하 쪽파의 포장화로 인한 순수익은 1,254백원에 이르고 있으며, 이를 kg당으로 환산하면 161.8원, 1단(1.4 kg) 기준으로 환산하면 226.5원에 달한다. 따라서, 산물출하 쪽파의 포장화로 인하여 추가로 얻게 되는 순수익은 하절기 1,545백만원, 동절기 1,254백만원으로 모두 2,799백만원에 이른다. 이를 kg당으로 환산하면 170.0원, 1단(1.4 kg) 기준으로 환산하면 238.0원에 달한다.

• 한국유기농업학회지
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• 제21권4호
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• pp.523-538
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• 2013

To help improve the current government practice of direct damage-compensation policies, resulting from the loss of profit, sustained by Hanwoo farmers, as a result of the recent Korea-U. S. Free Trade Agreement (FTA), this research aims to examine any problems or issues caused by said policies. To accomplish this task, we have established Hanwoo-SIMO model and estimated the damage of Hanwoo farmers, one without the implementation of the FTA and another with the FTA, to compare and contrast the two. We then analyzed the efficacy of the current government policies. According to our analysis, the current direct compensation policies for the loss of profit on the part of Hanwoo farmers are insufficient. To address this problem, we recommend the government enact a new direct damagecompensation law to address the following issues. First, as the base formula of damage-compensation, the government should use current price of the beef rather than the annually changing flexible price. Second, the flexible control index should remain fixed at 1.0 rate while the government prepares the adequate amount of the damage compensating direct payment resulting from the FTA. Third, the direct government compensation policy should extend beyond the current 15 years (2013-2026) as the profit loss is expected to increase after the midpoint of the FTA.

• 보건행정학회지
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• 제14권1호
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• pp.44-64
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• 2004

As of 1 July 2000 a big reform was introduced into the Korean health care system: the separation between prescribing and dispensing of drugs (SPD reform). There was, however, a big financial stake associated with pharmaceuticals, particularly before the reform, because physicians as well as pharmacists were allowed to purchase drugs at much lower costs than the insurance reimbursement. In this respect, this study focuses on the change in income and profit of both doctor's clinics and pharmacies after the reform. Data from National Health and Nutritional Survey by the ministry of health and welfare were used to estimate the income or expenditure that are financed by out-of-pocket payment of the patients, while national health insurance data etc. were used for the estimation of the income or expenditure that is financed by insurers. Average annual income per doctor's clinic increased from 299 million won to 338 million won for the three years between 1998 and 2001, whereas average annual income per pharmacy increased enormously from 60 million won to 305 million won for the same period. Average annual 'profit' increase per each doctor's clinic caused by the reform itself was estimated to range from 50 to 83 million won, while that per each pharmacy, from 23 to 87 million won. In sum, while both doctor's clinics and pharmacies are beneficiaries of the SPD reform, its positive impact is particularly prominent on the latter.

• 대한안전경영과학회지
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• 제3권4호
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• pp.135-144
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• 2001

The capital cost of the company is one that must be paid to the money owner as the price by using the money. The capital cost according to the source of money supply can be estimated by the expected profit rate undertaken by the use of the capital. But in the area of pre-existent economic evaluation, the evaluation of the company investment has been treated by the profit rate of the capital after considering the repayment conditions of the other's money or the interest. Thus in this study, in case the company makes an investment on various kinds of the capital at the same time, not make use of the capital as a one source, the economic evaluation of an investment should be handled by taking the weighted average cost of capital into consideration in proportion to the constitution of the capital cost by the sources of money supply, Especially, as the cost of the private money is very much connected with the profit rate through the stock market, the Capital Asset Pricing Model (CAPM) will be applied. This kind of economic evaluation method can be said to have much to do with the Economic Value Added : EVA) as well as to be highly thought as a standard to estimate the company' value recently To certify the usefulness of this approach, the case study of the output of the capital cost will be made for the purse of the economic evaluation of the alternative investment by using the financial statements of a motor company H.

• 기술혁신학회지
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• 제10권3호
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• pp.431-457
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• 2007

본 연구는 부품소재 중핵기업의 기술혁신 결정요인을 분석하기 위해 기업규모, 시장집중도 그리고 기업의 특성을 나타내는 일반변수들과 혁신유무의 관계를 측정하였다. 본 연구는 이를 위하여 과학기술정책연구원이 조사한 '기술혁신조사' (KIS2005)의 원자료와 Probit 모형을 활용하였다. 실증분석 결과에 의하면 기업규모는 혁신의 유무와 정(+)의 관계에 있으나 시장집중도는 부(-)의 영향을 미치는 것으로 나타났다. 기업특성을 나타내는 일반변수 중에는 순이익과 연구개발비가 혁신유무와 정(+)의 관계를 갖는 반면, 수출액과 자기자본비율은 부(-)의 관계에 있는 것으로 나타났다. 결론적으로, 부품소재 중핵기업의 기술혁신 활동을 촉진하기 위해서는 기업규모의 증대와 경쟁적인 시장구조의 조성이 이루어져야 할 것이며 또한 연구개발 활동에 대한 재정적 지원과 함께 자본 및 금융시장에서의 원활한 자본조달이 뒷받침되어야 할 것이다. 다만, 본 연구의 실증분석에서 나타난 수출액과 혁신유무의 관계에 대해서는 추가적인 연구가 필요할 것이다.

• 유기물자원화
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• 제24권3호
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• pp.83-90
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• 2016

바이오차 시용이 토양비옥도나 온실가스 완화에 기여하는 것 외에, 경작지 시용에 따른 탄소격리 및 순익 분석이 평가된바 거의 없다. 본 연구는 옥수수 재배 기간 동안 온실가스 완화에 대한 이익을 평가하고, 탄소격리를 산정하기 위해 수행되었다. 본 실험의 처리구는 돈분처리구, 돈분을 퇴비로 시용하면서 바이오차 처리를 2,600(0.2%), 13,000(1%), 및 26,000(2%) kg/ha로 나누어 시용하였다. 바이오차 시용에 따른 탄소 격리량을 예측하기 위해 Y = 0.5523X - 742.57 ($r^2=0.939^{**}$) 일차 모형식을 유도하였으며, 본 수식을 바탕으로 바이오차 0.2, 1 및 2% 시용 시 탄소 격리량은 각각 1,235, 3,978, 및 14,794 kg/ha로 산정되었고, 온실가스 완화는 각각 4.5, 14.6, 및 54.2 ton/ha로 평가 되었다. 이에 대한 이익 평가는 적게는 $14.6, 많게는 $452로 산정되었다. 또한 한국 기후변화 시장의 이산화탄소 시장 거래가로는 바이오차 0.2, 1 및 2% 시용 시 $35.6, $115.3 및 $428.2로 나타났다. 바이오차 시용에 대한 작물 재배에 있어, 초장과 수량은 처리간에 유의차가 인정되지 않았다. 따라서 본 실험결과는 농사활동에서 바이오차를 토양에 시용함으로서 탄소 배출건 거래제가 시행된다는 전제 조건하에 기초자료가 될 것이다.