• 산업경영시스템학회지
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• 제26권1호
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• pp.30-39
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• 2003

This paper presents the business model and system functionalities of a B2B e-marketplace solution that not only can overcome some problems of the public e-marketplace, but also can be applicable to both public and private types of e-marketplaces. This solution is different from the most of the public e-marketplace solutions that their main sources of revenue are transaction commissions or transaction fees through the third-party intermediation. Instead, this solution provides an ASP (Application Service Provider) functionality for direct, disintermediated purchasing and sales-related transactions between suppliers and buyers. With this functionality, suppliers and buyers electronically commerce with each other without the disclosure of their transactions as well as transaction commissions.

• 한국IT서비스학회:학술대회논문집
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• 한국IT서비스학회 2009년도 춘계학술대회
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• pp.122-125
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• 2009

본 연구는 u-City에서 제공하는 u-서비스의 새로운 수익모델 창출을 위한 접근 방안으로 사용자 중심의 접근을 시도 했으며 u-서비스에 사용자가 부여하는 가치에 중점을 두고 연구를 진행하였다. 사용자가 부여한 가치의 확장을 통해 새로운 서비스 또는 수익모델 창출의 기회를 발굴하고자 하였다. 연구 결과 사용자가 부여하는 1차적인 가치는 서비스와 관련된 다양한 가치로 그 의미가 확장될 수 있었다. 확장된 가치를 근간으로 기존에 고려하지 못한 새로운 서비스와 수익모델을 발굴할 수 있는 기회를 포착할 수 있었다. u-서비스의 수익모델 창출을 위한 새로운 접근 방안으로써 사용자 가치에 대한 고려는 실질적으로 서비스를 사용할 사용자에 기초한 관점으로 사용자 중심의 u-서비스 개발 및 수익모델 발굴에 중요한 연구가 될 것이라 생각된다.

• 자원ㆍ환경경제연구
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• 제10권2호
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• pp.173-216
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• 2001

We compare impacts of different $CO_2$ abatement mechanisms using a CGE model. Focus is on the way the tradable permits are initially distributed for emissions trading, namely auction and grandfathering. For three major energy consuming industries (basic chemical, iron & steel and electricity) in Korea, emissions trading is clearly superior to individual $CO_2$ abatement, but auction and grandfathering show somewhat different patterns of impact. We show that depending on how the government uses the revenue from permit auction, auction may be preferable to grandfathering.

• ETRI Journal
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• 제32권1호
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• pp.129-138
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• 2010

This paper qualitatively and quantitatively examines the effectiveness of regulations currently in place in the Korean mobile telecommunications market by comparing their intended objectives with the actual outcome, particularly with respect to the performance of market participants. The results show that the regulations have generally been effective in lowering the average revenue per user of carriers. However, the managed competition efforts of the government have also resulted in increased revenues for the top two carriers in the market without significantly affecting their general business operations.

• 산업경영시스템학회지
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• 제21권45호
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• pp.201-213
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• 1998

We address the problem of choosing the most economic mean value for an automatic filling operation on a production line through the sampling inspection. If quality characteristic of a unit is less than inspection specification then the goods is not accepted. Otherwise, it is accepted. The lots that the numbers of non-conforming units in a sample are larger than the allowable number of non-conforming units are rejected. The non-conforming units in the rejected lots are separated by the screening inspection. The non-conforming units separated are sold in discount price. We assume that quality characteristic is larger-the-better characteristic, the distribution of quality characteristic is normal distribution, and the standard deviation of the distribution is known. This paper presents total expected profit function model considering sales revenue, inspection costs, and material costs. The manufacturing process mean value maximizing total expected profit is determined, and the results of the process target value and total expected profit is analyzed as coefficients change.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 추계학술대회 논문집
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• pp.522-527
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• 2005

Rail network authority have to do the safety ensuring activities including the maintenance of railway facility, integrated performance verification between the facilities and related rolling stock and safety inspections, etc. When constructing the new lines or revising the conventional lines, full system commissioning should be done before the revenue service with railway operator. To develop the optimal full system commissioning model, the status of domestic and foreign railway facility and railway accidents are analysed and the problems of the safety management are derived. As one of countermeasures for the problems, the procedures and criteria for the full system commissioning are developed.

• 경영과정보연구
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• 제4권
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• pp.327-348
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• 2000

There are three major motives for M&A, financial synergy effect, operating & managerial synergy effect, and tax effect. The purpose of this study is to prove the operating & managerial synergy effect of M&A. To do this, we analyze the market-ripple effect of M&A, focusing on the increase in market power. Specifically we use cross-sectional data from 1985 to 1998 to show whether a market power of mergers is higher than that of a matched non-merging control group. we use time series data to show whether a market power of merger is higher than that of pre-merger. Also we use the event study using market model to show the stock price movement after mergers. The result is that although revenue increase after mergers, profit of the firms does not improve after mergers. Also there is sufficient evidence to say that there is a cumulative abnormal return for the firms after mergers.

• 산업경영시스템학회지
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• 제32권4호
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• pp.192-202
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• 2009

Disassembly of products at their end-of-life (EOL) is a prerequisite for recycling or remanufacturing, since most products should be disassembled before being recycled or remanufactured as secondary parts or materials. In disassembly sequence planning of EOL products, considered are the uncertainty issues, i.e., defective parts or joints in an incoming product, disassembly damage, and imprecise net profits and costs. The paper deals with the problem of determining the disassembly level and corresponding sequence, with the objective of maximizing the overall profit under uncertainties in disassembly cost and/or revenue. The solution is represented as the longest path on a directed acyclic graph where parameter (arc length) uncertainties are modeled in the form of intervals. And, a heuristic algorithm is developed to find a path with the minimum worst case regret, since the problem is NP-hard. Computational experiments are carried out to show the performance of the proposed algorithm compared with the mixed integer programming model and Conde's heuristic algorithm.

• East Asian Economic Review
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• 제17권3호
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• pp.243-260
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• 2013

The dominant academic literature about trade agreements maintains that they are only about national terms-of-trade manipulation and not at all about purely political concerns. Non-academic economists, commentators, and diplomats by contrast think that trade agreements are all about political concerns. There are two substantive and important distinctions between the two views. i Practitioners maintain that policymakers care virtually not at all about the terms of trade or about trade-tax revenue. ii Practitioners, unlike academics, maintain that trade-agreement negotiations themselves change the underlying political economy. Observation of actual trade policy measures, though not conclusive, suggests that the practitioners are right and that the academics are wrong.

• International Journal of Reliability and Applications
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• 제4권4호
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• pp.183-190
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• 2003

Rail breaks and derailments can cause a huge loss to rail players due to loss of service, revenue, property or even life. Maintenance has huge impact on reliability and safety of railroads. It is important to identify factors behind rail degradation and their risks associated with rail breaks and derailments. Development of mathematical models is essential for prediction and prevention of risks due to rail and wheel set damages, rail breaks and derailments. This paper addresses identification of hazard modes, estimation of probability of those hazards under operating, curve and environmental condition, probability of detection of potential hazards before happening and severity of those hazards for informed strategic decisions. Emphasis is put on optimal maintenance and operational decisions. Real life data is used for illustration.