• 한국건축시공학회지
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• 제17권5호
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• pp.473-481
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• 2017

국방부는 노후 된 병영생활관 현대화 개선을 추진하여 고시된 75개 사업 중 60개 사업이 운영 중에 있다. 따라서 과거에는 데이터 조사 분석이 어려움이 많았으나 현재는 민간 운영사로부터 정보를 파악하고 분석할 수가 있다. 본 연구에서는 시설물의 사용성을 높이기 위하여 병영시설물의 3~5년 수선유지비의 예산과 사용 데이터를 조사 및 분석하여 문제점을 도출하여 수선유지비에 대하여 합리적인 대안을 제시하는 목적으로 하였다. 이에 맞게 이론적 고찰 및 선행 연구, 수선유지비에 대한 법적인 근거, 국방부 병영시설 BTL사업의 수선유지비 예측 비용과 사용 데이터를 분석하였다. 도출된 문제점으로는 첫째는 소모품, 없는 항목, 누락 항목에 대하여 예산을 추가로 확보하는 개선방안을 제시 하였다. 둘째는 평균으로 분할하는 지급에 대하여서는 3~5년 운영기간에는 축소하여 지급하는 개선방안과 장기수선계획 수립기준으로는 예산이 없거나 작게 지급되어 3~5년 운영기간에는 예산을 추가 또는 보완하여 지급하는 개선방안을 제시하였다. 향후 병영시설의 운영기간과 실적 데이터가 추가로 확보가 가능한 시점에 수선유지비 효율적 연구는 보완되어야 한다. 본 연구는 향후 국방부 병영시설 건설에 대하여 사업비를 합리적으로 유도하는데 기여할 수 있을 것이다.

• 한국IT서비스학회지
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• 제12권3호
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• pp.345-377
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• 2013

Government agencies have many difficulties for the information system development and operation. One of the difficulties is a budget estimation. Each government agency suggests individually different estimation for the personnel expenses and IT infrastructure adoption costs in the same field of informatization promotions. The other one is the operation costs are increased exponentially in every year[42, 51]. Those difficulties make government agencies can not help adopting SaaS. In fact, most of IT consulting company and government agencies already recognized a variety of SaaS advantages. The most typical SaaS's advantages are cost reduction, Software rapid development and deployment. However, once government agencies decide to adopt SaaS, they can not avoid many problems and difficulties. There is no information in a detailed item in a budget. In those kinds of situation, there is no choice whether government agencies accept SaaS provider's suggesting adoption costs or not. Thus, we provide a sheet of SaaS adoption cost estimation to government agencies. To know the cost factors, this study uses TCO(Total Cost of Ownership)'s criteria. To give a management point, this study uses Gartner's Application development Life Cycle. In this study, the integration check framework which is SaaS adoption cost estimation makes government agencies possible to establish a adequate budget.

• 한국컴퓨터정보학회논문지
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• 제11권6호
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• pp.221-226
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• 2006

Ad Hoc 네트워크는 유선 네트워크와는 달리 이동성이 존재하는 노드들이 무선환경에서 상호 연결되어 네트워크를 구성한다. 이러한 형태는 라우팅과 서비스 운영환경에서 노드들의 단절 현상이 발생한다. 각 노드들의 위치 정보를 파악하면 이러한 현상을 회피하거나 복구할 수 있고, 일반적으로는 GPS를 이용하여 위치 정보를 파악하지만 구축과 관리가 복잡하고 고비용을 필요로 한다. 본 논문에서는 GPS를 사용하지 않고 전체 노드들이 가지고 있는 정보만을 이용하여, 이동 노드들의 전체적인 위치 정보를 나타내는 맵을 구성하는 방식을 제안하고 구현한다. 제안한 방식은 기존 시스템을 소프트웨어적으로 보완하므로 구축과 운영이 간단하고 구축비용을 절감할 수 있다.

• 한국의류산업학회지
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• 제22권1호
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• pp.38-54
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• 2020

This study examines the time causal relationship between the operation profit of the listed fashion companies and the macro variables. Operating profit data of 36 listed fashion companies from 2000 to 2017 has been used. Macro variables include household income, household expenditure, number of Korean overseas travelers, number of foreigner travelers and sentiment index. The study results are as follows. First, the number of outbound travelers from Korea has a negative effect on the operating profit of listed fashion companies; however the number of foreigner visiting Korea has a positive effect at 0 time lag. Second, the consumer sentiment index had a positive effect on the sales and the operating profits of the listed fashion companies with a time difference between the 3rd and the 4th quarter. Third, a disposable income has a positive effect on the operating profit of listed fashion companies. Last, educational expenses have a negative effect on operating profit with a time lag between the first and the second quarter. The findings can be used as useful information to analyze the fashion industry and help fashion companies improve their financial performances.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2017년도 제48회 춘계학술대회논문집
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• pp.142-143
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• 2017

무기체계에 첨단기술이 접목되고 연구개발에 많은 비용이 듦으로써 소요군은 수명주기 전 단계에서 무기체계의 높은 신뢰도를 요구하고 있다. 하지만 국방 무기체계의 신뢰도에 대한 연구는 관심부족 또는 자료수집의 제한으로 실증적인 연구가 제한되고 있다. 본 연구에서는 무기체계 운용자인 함정, 작전 및 정비지원 부대(작전사, 군수사, 정비창, 업체)들을 직접 방문하여 수집한 경험을 바탕으로 야전운용제원 수집 프로세스를 제안하였으며, 이를 활용하여 해성 유도탄 발사체계의 운용 MTBF를 도출하여 개발 시 목표값과 비교 분석하였다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2022년도 추계학술대회
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• pp.300-301
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• 2022

신규 해상교통수단을 통한 섬 접근 이동성 강화를 위해서는 해당 선박의 투입에 따른 객관적인 사업성에 대한 검토가 필요하다. 본 연구에서는 기존에 운영 중인 유사 해양레저선박 운영비와 운임기준을 근거로 하여 비용과 수입을 추정한 뒤, 이를 바탕으로 비용-편익 분석, 순현재가치, 내부수익률을 통해 사업 타당성을 실증적으로 분석하였다. 또한 최소 경제성 확보를 위한 요건을 파악하기 위하여 항목별로 민감도 분석을 수행하였다. 연구결과 신조선 도입을 가정하였을 때, B/C 비율이 1.042, NPV는 1.93억 원, IRR은 2.1%로 추정되어 수익성이 미약하게 확보되는 것으로 분석되었다.

• 한국환경보건학회지
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• 제39권3호
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• pp.289-299
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• 2013

Objectives: For the field application of the dielectric barrier discharge plasma reactor, scale-up of the plasma reactor is needed. This study investigated the possibility of inactivation of microorganisms in sewage using pilot multi-plasma reactor. We also considered the possibility of degradation of total organic carbon (TOC) and nonbiodegradable matter ($UV_{254}$) in sewage. Methods: The pilot plasma reactor consists of plasma reactor with three plasma modules (discharge electrode and quartz dielectric tube), liquid-gas mixer, high voltage transformers, gas supply equipment and a liquid circulation system. In order to determine the operating conditions of the pilot plasma reactor, we performed experiments on the operation parameters such as gas and liquid flow rate and electric discharge voltage. Results: The experimental results showed that optimum operation conditions for the pilot plasma reactor in batch experiments were 1 L/min air flow rate), 4 L/min liquid circulation rate, and 13 kV electric discharge voltage, respectively. The main operation factor of the pilot plasma process was the high voltage. In continuous operation of the air plasma process, residual microorganisms, $UV_{254}$ absorbance and TOC removal rate at optimal condition of 13 kV were $10^{2.24}$ CFU/mL, 56.5% and 8.6%, respectively, while in oxygen plasma process at 10 kV, residual microorganisms, $UV_{254}$ absorbance and TOC removal rate at optimal conditions were $10^{1.0}$ CFU/mL, 73.3% and 24.4%, respectively. Electric power was increased exponentially with the increase in high voltage ($R^2$ = 0.9964). Electric power = $0.0492{\times}\exp^{(0.6027{\times}lectric\;discharge\;voltage)}$ Conclusions: Inactivation of microorganisms in sewage effluent using the pilot plasma process was done. The performance of oxygen plasma process was superior to air plasma process. The power consumption of oxygen plasma process was less than that of air plasma process. However, it was considered that the final evaluation of air and oxygen plasma must be evaluated by considering low power consumption, high process performance, operating costs and facility expenses of an oxygen generator.

• 한국수소및신에너지학회논문집
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• 제23권6호
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• pp.598-603
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• 2012

Despite the high efficiency and eco-friendly of Household Fuel Cell System it has hardly obtained popularity mainly due to its high prices. In order to encourage use of the system prices and operational expenses need to become economical. In this study, optimization through simulation was conducted to find out the optimal operational condition. As a result of simulation the system is operated with DSS operation from 5 O'clock to 19 O'clock for 14 hours at the constant output of 0.4kW to maximize reduction of energy rate. this DSS operation condition can reduce 200,000 won of energy rates in 35 pyoung apartment for a year. And, we can know that starting time of DSS operation don't effect to energy rates through the simulation. Furthermore, the household fuel cell system with the rated output of 1kW should be reduced to 0.4 - 0.6kW which can promote installation of household Fuel Cell System. Now, the household fuel cell system don't have been used widely due to economical efficiency. but, in the near future, Fuel Cell will be used to household by decrease of LNG price caused by development of shale gas.

• 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.

• Ocean and Polar Research
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• 제38권3호
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• pp.225-234
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• 2016

This project sought to conduct an economic feasibility study regarding the commercial production of bio-hydrogen by the marine hyperthermophilic archaeon, Thermococcus onnurineus NA1 using carbon monoxide-containing industrial off-gas. We carried out the economic evaluation of the bio-hydrogen production process using the raw material of steel mill by-product gas. The process parameter was as follows: $H_2$ production rate was 5.6 L/L/h; the conversion of carbon monoxide was 60.7%. This project established an evaluation criterion for about 10,000 tonne/year. Inflation factors were considered as 3%. The operating costs were recalculated based on prices in 2014. The total investment required for development was covered 30% by capital and 70% by a loan. The operation cost for the 0.5-year test and integration, and the cost for the first three months in the 50% production period were considered as the working capital in the cost estimation. The costs required for the rental of office space, facilities, and other related costs from the construction through to full-scale production periods were considered as continuing expenses. Materials, energy, waste disposal and other charges were considered as the operating cost of the development system. Depreciation, tax, maintenance and repair, insurance, labor, interest rate charges, general and administrative costs, lubrication and miscellaneous expenses were also calculated. The hydrogen price was set at US$ 4.15/kg for the economic evaluation. As a result, the process was considered to be economical with the payback period of 6.3 years, NPV of 18 billion Won and IRR of 26.7%.