• Journal of Communications and Networks
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• 제4권4호
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• pp.282-291
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• 2002

3GPP (Third Generation Partnership Project) is defining UMTS (Universal Mobile Telecommunication System) releases which span the transition from GSM/UMTS coexistence to All-IP UMTS networks. The deployment of an UMTS network depends, in the first place, on the intended service offerings and the release an operator chooses to start service with. Other key decisions in-fluencing UMTS deployment relate to the timing of the functional enhancements and capacity increases along the economic life of the network. This paper gives an overview on the architectural and technical options for UMTS deployment. It also outlines the methodology underlying the business plan aimed at estimating the returns from investments in the UMTS infrastructure, thus helping to tune operators’ strategies for UMTS deployment.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 춘계학술대회 논문집
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• pp.599-600
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• 2006

In order to promptly cope with the various requirements of consumers, the environment of product development is being globalized in manufacturing industrials. For this reason, it is necessary to build up an efficient collaborative system for communication between remote area designers. Specially, while Internet and information technologies were merged with the manufacturing or business process, the research for collaborative system has become an important issue. Therefore, we propose a Web-based Engineering Collaboration Framework using SPS(SharePoint Portal Server) which is an enterprise business solution that integrates information from various system into one solution through single sign-on and enterprise application integration capabilities, with flexible deployment options and management tool. Through a Web-based Engineering Collaboration Framework, designers can share knowledge assets and have a remote conference with others via web.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2002년도 춘계공동학술대회
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• pp.1030-1037
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• 2002

통신서비스의 성패를 좌우하는 다양한 선택의 문제 중 하나는 신규 서비스를 제공하는 데 있어서, 어떤 기술을 도입하고 언제 상용화할 것인가를 결정하는 것이다 이러한 결정에는 서비스를 제공하는데 수반되는 투자와 비용, 시장 규모의 예측, 경쟁사업자 동향, 기존 또는 유사 기술과의 호환성이나 경쟁 관계 등이 고려되어야 하며, 이를 위해 다양한 경제성분석 방법이 활용되어 오고 있다. 그러나, 전통적인 현금흐름할인법의 경우, 현재 획득 가능하거나 추정할 수 있는 데이터를 이용해서 의사결정을 내리는 방식을 취하고 있으며 유연한 사고를 통해 수시로 변화하는 사업환경을 동태적 입장에서 의사결정을 지원할 수 없다는 한계를 지니고 있다. 최근, 이에 대한 대안으로 실물옵션이론을 활용한 경제성분석 방법이 소개되고 있다. 이는 금융옵션의 특성에 기반을 둔 방법으로, 주변 여건의 변화에 대해 유연한 의사결정을 지원할 수 있다는 측면이 통신서비스와 같은 불확실성이 큰 사업환경에 적합한 방법이 될 것으로 판단된다. 이에 본 논문에서는 새롭게 부각되고 있는 무선 LAN 서비스의 제공을 위한 통신 사업자의 서비스 도입 전략을 실물옵션이론을 활용해서 분석해 보고자 한다. 이를 통해, 통신사업자의 관점에서 무선 LAW 서비스의 제공을 추진할 때 가능성이 높은 몇 가지 시나리오에 대한 대응 방안과 유의점에 대해 고찰한다.

• 산업경영시스템학회지
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• 제20권43호
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• pp.91-97
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• 1997

The objective of a traffic management system is to promote safe driving, low pollution, short travel time, and optimized traffic flow by naturally distributing the flow of traffic through the use of suitable telecommunications media. Such traffic management systems will be improved by integrating dynamic traffic data and two-way communication media because cars can work as sensors. The purpose of this paper is to help organizations trying to select the correct telecommunications media for minimal-cost investment options without loss of functionality. The wireless communications for an intelligent transportation system (ITS) are introduced in this paper. We describe which kind of telecommunication media are suitable. FM broadcast type media or cellular phone can be recommended to provide real time traffic and roadway conditions in the first stage of ITS, because existing broadcast base station or cellular network facilities can be used. It is expected that cellular radio network or satellites are used for communication. Finally, the strategy and deployment plan of an ITS are described based on selections of telecommunication media in Korea.

• 경영정보학연구
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• 제21권4호
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• pp.47-68
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• 2019

클라우드 서비스 및 운영 방식이 다양해지면서 선택할 수 있는 클라우드 컴퓨팅의 종류가 많아지고 있는 만큼 금융회사에는 각 전산시스템에 적합한 클라우드를 선택할 수 있는 의사결정 방법이 필요한 상황이다. 본 연구에서는 기업의 비전 및 전략 수립을 위해 사용되는 BSC(Balanced Scorecard, 균형성과 관리) 프레임워크를 활용하여 금융회사에서 클라우드 도입을 위해 고려해야 할 요인들을 BSC의 4대 관점(재무, 고객, 내부 프로세스, 학습과 성장)에 따라 분류하고 최종 12개의 고려 요인을 선정하였으며, 다기준 의사결정 방법 중의 하나인 AHP(Analytic Hierarchy Process, 분석적 계층 프로세스) 기법에 따라 평가 항목들을 성과 평가 관점과 클라우드 고려 요인으로 계층화하여 최종 의사결정모형을 제안하였다. 나아가 금융회사의 시스템을 계정계, 정보계, 채널계 시스템으로 구분하고 금융회사 두 곳의 금융 전문가와 정보 기술 전문가의 의사 결정 결과를 취합하여 각 시스템 별 클라우드 도입 시 고려 요인에 대한 중요도 및 클라우드 운영 모델의 적합도에 대한 비교 분석을 수행하였다. 분석결과 모든 시스템에서 공통적으로 중요하게 평가된 일부 고려 요인도 있었지만 대부분의 고려 요인은 시스템 별 중요도가 매우 다르게 평가되었으며, 실제 시스템 별 적합한 클라우드 운영 모델은 서로 상이하였다. 이를 통해, 각 금융회사에서는 클라우드 컴퓨팅 도입 시 각 시스템 별 클라우드 고려요인을 평가하여 운영 모델을 선정해야 한다는 시사점을 주었으며, 더불어 본 연구에서 제시하는 일련의 절차와 방법론을 통하여 금융회사의 클라우드 컴퓨팅 도입에 대한 인식을 제고하고 클라우드 컴퓨팅 도입 확산에 기여할 것으로 기대한다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.147-152
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• 2005

In order to promptly cope with the various requirements of consumers, the environment of product development is being globalized in manufacturing industrials. For this reason, it is necessary to build up an efficient collaborative system for communication between remote area designers. Specially, while Internet and information technologies were merged with the manufacturing or business process, the research for collaborative system has become an important issue. Therefore, we propose a Web-based Engineering Collaboration Framework using SPS(SharePoint Portal Server) which is an enterprise business solution that integrates information from various system into one solution through single sign-on and enterprise application integration capabilities, with flexible deployment options and management tool. Through a Web-based Engineering Collaboration Framework, designers can exchange design information and have a conference in remote area designers or designer teams for alternative designs

• 한국철도학회논문집
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• 제10권2호
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• pp.137-145
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• 2007

In traditional financial theory, the discount cash flow model(DCF or NPV) operates as the basic framework for most analyses. In doing valuation analysis, the conventional view is that the net present value(NPV) of a project is the measure of the present value of expected net cash flows. Thus, investing in a positive(negative) NPV project will increase(decrease) firm value. Recently, this framework has come under some fire for failing to consider the options of the managerial flexibilities. Real option valuation(ROV) considers the managerial flexibility to make ongoing decisions regarding the implementation of investment projects and the deployment of real assets. The appeal of the framework is natural given the high degree of uncertainty that firms face in their technology investment decisions. This paper suggests an algorithm for estimating volatility of logarithmic cash flow returns of real assets based on the Black-Sholes option pricing model, the binomial option pricing model, and the Monte Carlo simulation. This paper uses those models to obtain point estimates of real option value with the G7- HSR350X(high-speed train).

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2011년도 추계학술대회 초록집
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• pp.152.1-152.1
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• 2011

This study analyzes transitions to a green path in transportation system in South Korea. We develop transportation system model with four new technology options, green cars; Hybrid electric vehicle, plug-in hybrid vehicle, electric vehicle and fuel cell vehicle. Among those technologies fuel cell vehicle is the best option assuming no GHG emissions when driving. We use MESSAGE model to get an optimal solution of pathway for high deployment of fuel cell vehicles under the Korea BAU transportation model. Among hydrogen production sources, off gas hydrogen is most economic since it is hardly used to other chemical sources or emits in South Korea. According to off gas hydrogen projection it can run 1.8 million fuel cell vehicles in 2040 which corresponds to 10% of all passenger cars expected in Korea in 2040. However, there are concerns associated with technology maturity, cost uncertainty which has contradictions. But clean pathway with off gas and renewable sources may provide a strong driving force for energy transition in transportation in South Korea.

• 한국항만경제학회지
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• 제21권1호
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• pp.1-21
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• 2005

It has been more recent trends in container trade to make bogger ship from shipowners that many more parties concerned are getting involved. Well, it is natural to swift these situations if we have looked into container trade market in present time, which a lot of trade volumes has increased in world economy. Thus, supply side of shipping service needs to employ more capacity in the shipping market, then newbuilding may be compulsory options, that is deployment of larger ships. To cope with market situations as able shipowner, some alternatives can be also adopted, such as newbuilding, chartering and securing the space by strategic alliance. But whatever he does, shipowner has to keep in mind to prepare for the future. This is much more important factor considered to make investment decision in case of newbuilding and then he can make more efficient decision as well. However, there has been a little problems arisen due to larger ship employed on the trade route, which is linked with seaport, shipping companies and freight rates as well. Although shipowner decides to build new larger vessel as one of corporate strategic decision, there are many questions to be considered in advance. Therefore, in order to take more efficient decision, shipowner has to take into an account various situations surrounded, and then it can lead truly thoughtful decision making process.

• Nuclear Engineering and Technology
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• 제40권1호
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• pp.9-20
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• 2008

Since plutonium accounts for 40-50% of the power produced by uranium fuels, spent fuel contains only residual plutonium. Management of this plutonium is one of the aspects influencing the choice of a fuel cycle back-end option: reprocessing, direct disposal or wait-and-see. Different grades and qualities of plutonium exist depending from their specific generation conditions; all are valuable fissile material. Safeguard authorities watch the inventories of civil plutonium, but access to those data is restricted. Independent evaluations have led to an estimated current inventory of 220t plutonium in total (spent fuel, separated civil plutonium and military plutonium). If used as MOX fuel, it would be sufficient to feed all the PWRs and BWRs worldwide during 7 years or to deploy a FBR park corresponding to 150% of today' s installed nuclear capacity worldwide, which could then be exploited for centuries with the current stockpile of depleted and spent uranium. The energy potential of plutonium deteriorates with storage time of spent fuel and of separated plutonium, due to the decay of $^{241}Pu$, the best fissile isotope, into americium, a neutron absorber. The loss of fissile value of plutonium is more pronounced for usage in LWRs than in FBR. However, keeping the current plutonium inventory for an expected future deployment of FBRs is counterproductive. Recycling plutonium reduce the required volume for final disposal in an underground repository and the cost of final disposal. However, the benefits of utilizing an energy resource and of reducing final disposal liabilities are not the only aspects that determine the choice of a back-end policy.