• 한국IT서비스학회:학술대회논문집
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• 한국IT서비스학회 2008년도 추계학술대회
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• pp.175-178
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• 2008

With rapid advancement of IT and Internet technologies, online market is surely becoming a stage of the competition among various forms of platform providers. This study show the significance of the negotiation process in the platform pricing strategy and observe several external/internal factors that might affect the negotiation power of the identities surrounding the platform. Major theories used in this study are the resource-based-view and network theory. Resources resulting in a negotiation power of the content providers and platform providers turn out to be widely scattered in their business areas - from product characteristics to the size of the content provider. End-user (or buyer) group which cannot make a strategic move for the organized development and use of resources is taking advantage of network externalities to support its negotiation power.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2004년도 춘계공동학술대회 논문집
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• pp.738-741
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• 2004

최근 다양한 금융 데이터를 신경망 이론을 비롯한 최적화 기법을 통해 모델링 하려는 시도가 증가하고 있다. 이러한 시도는 블랙숄즈 모델이 가지고 있는 몇 가지 비현실적인 가정들을 극복할 수 있다는 점에서 성공적이다. 그러나 각각의 최적화 기법의 고유한 특성을 고려하지 못한 채 적용하여 성능면에서 큰 향상을 보이지 못하고 있다. 따라서 이론과 기법의 적용에 있어 금융데이터의 특성에 맞는 명확한 절차의 정의가 필요하다. 본 논문에서는 옵션의 가격결정에 적용 가능한 신경망 기법들을 제시하고 절차를 정의, 분석하고 그 성능을 블랙-숄즈 방정식과 비교한다. 비교 분석 결과는 블랙-숄즈 방정식에 의한 가격 오차와 최적화 기법을 통한 가격오차가 통계적으로 유의한 차이가 있는지 여부를 분석함으로써 유의성을 검증하였다.

• Journal of Electrical Engineering and Technology
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• 제2권4호
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• pp.494-499
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• 2007

In this paper, we have investigated how transmission network constraints can be modeled in an electricity market equilibrium model. Under Cournot competition assumption, a game model is set up considering transmission line capacity constraints. Based on locational marginal pricing principle, market clearing is formulated as a total consumers# benefit maximization problem, and then converted to a conventional optimal power flow (OPF) formulation with a linearized transmission model. Using market clearing formulation, best response analysis is formulated and, finally, Nash equilibrium is formulated. In order for illustration, a numerical study for a four node system with two generating firms and two loads are presented.

• 산업경영시스템학회지
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• 제44권1호
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• pp.37-44
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• 2021

The information products dramatically reduce the production costs of vertically differentiated products. Information products are also more likely to be affected by network externalities. Thus the proliferation of digital products is increasing the interests in network externality and vertical product differentiation. In step with this trend, the impact of network externalities on price competition in vertically differentiated markets has been continuously studied. Existing studies related to this topic have assumed that network externalities increase consumers' willingness to pay per unit quality. The results show that higher quality products are affected more by network externality. However, network externality is essentially a concept affected by the size of the consumer, not a concept associated with quality. In this work, unlike previous studies, we present a new market model that reflects the essential definition of network externality. Based on the proposed market model, we derive both simultaneous and sequential Nash equilibria and analyze them numerically. The main results obtained from the analysis can be summarized as follows. First, network externalities primarily increase the demand for low-quality products and have a secondary impact on the demand for high-quality products. Second, the larger the quality difference between products, the more profitable they are. It also has been shown that sequential pricing methods are more advantageous in terms of revenue than simultaneous pricing method.

• 대한전자공학회논문지TC
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• 제41권3호
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• pp.179-179
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• 2004

가까운 미래에 우리는 기존의 정액제 요금에서 종량제가 첨가되는 것과 같은 인터넷서비스의 요금체계에 변화를 맞이할 것이다. 본 논문은 이와 같은 움직임에 대비하여 차세대 네트워크에서 서비스품질이 보장되는 인터넷 서비스에 대한 사용량기반의 과금체계를 제안하고자 한다. 먼저, IP 네트워크에서 가장 주류를 이룰 Assured service에 의해서 발생되는 적응성이 있는 트래픽의 특성을 살펴보고, 이어서 네트워크 대역의 사용량에 기반한 과금방안을 제안한다. 그리고, 어떤 형태의 Assured service에도 적용 가능한 과금함수를 제안하고, 간단한 수치계산을 통하여 제안하는 방법의 유효성에 대하여 기술한다.

• 대한전자공학회논문지TC
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• 제41권3호
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• pp.21-28
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• 2004

가까운 미래에 우리는 기존의 정액제 요금에서 종량제가 첨가되는 것과 같은 인터넷서비스의 요금체계에 변화를 맞이할 것이다. 본 논문은 이와 같은 움직임에 대비하여 차세대 네트워크에서 서비스품질이 보장되는 인터넷 서비스에 대한 사용량기반의 과금체계를 제안하고자 한다. 먼저, IP 네트워크에서 가장 주류를 이룰 Assured service에 의해서 발생되는 적응성이 있는 트래픽의 특성을 살펴보고, 이어서 네트워크 대역의 사용량에 기반한 과금방안을 제안한다. 그리고, 어떤 형태의 Assured service에도 적용 가능한 과금함수를 제안하고, 간단한 수치계산을 통하여 제안하는 방법의 유효성에 대하여 기술한다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2003년도 춘계종합학술대회
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• pp.648-652
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• 2003

제 3세대 이동 통신망인 GPRS(General Packet Radio Service)망에서는 SGSN(Serving GPRS Support Node)과 GGSN(Gateway GPRS Support Node) 사이의 전송계층을 IP-Over-ATM 망을 기반으로 한다. 이는 비연결형(connectionless) IP 트래픽들을 연결지향형(connection-oriented) ATM 전송계층을 통해 전송하는 것을 의미한다. 이때 효율적인 자원관리를 위해 적절한 VC(Virtual Circuit)의 접속과 해제를 수행해야 한다. 본 논문에서는 GPRS망에 인터넷 웹 서비스 트래픽 모델을 다양한 VC holding Cost Pricing Model(LRU, Mean-Variance, Adaptive policy[2])에 적용하였다. 각각의 기법들에서 VC의 이용율(utilization)과 설정율(setup rate)을 분석함으로써 각 기법의 성능을 비교하였다.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 1996년도 추계학술대회발표논문집; 고려대학교, 서울; 26 Oct. 1996
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• pp.186-189
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• 1996

In most of the recent research literature, network performance is expressed in terms of network engineering measures such as delay or loss. These performance measures are important to network owners and operators, but it is believed that user preferences should be the primary consideration which drives the resource allocation scheme. A network is only as valuable as its users perceive it to be. Therefore, it is advocated that the users themselves determine relative traffic priorities. This paper describes the role of feedback in network resource allocation, which could be part of a user-oriented framework for network operation and control. Feedback mechanism can also be used to improve the two types of efficiency in the network; network efficiency and economic efficiency.

• ETRI Journal
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• 제35권4호
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• pp.677-686
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• 2013

In this paper, we first introduce a general architecture of an energy management system in a home area network based on a smart grid. Then, we propose an efficient scheduling method for home power usage. The home gateway (HG) receives the demand response (DR) information indicating the real-time electricity price, which is transferred to an energy management controller (EMC). Referring to the DR, the EMC achieves an optimal power scheduling scheme, which is delivered to each electric appliance by the HG. Accordingly, all appliances in the home operate automatically in the most cost-effective way possible. In our research, to avoid the high peak-to-average ratio (PAR) of power, we combine the real-time pricing model with the inclining block rate model. By adopting this combined pricing model, our proposed power scheduling method effectively reduces both the electricity cost and the PAR, ultimately strengthening the stability of the entire electricity system.

• 대한전기학회논문지:전력기술부문A
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• 제55권4호
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• pp.156-162
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• 2006

Transmission zones can be defined based on LMPs. Each zone consists of nodes with similar LMPs, and zonal price is determined by average nodal prices in each zone.[1] Network reduction is still important for the analysis of zonal systems under electricity market environments, even though the computing capability of computer system can deal with entire power systems. The Similarity Index is a good performance measure for the network reduction.[2] It can be applied to the network reduction between zones categorized by the nodal prices. This paper deals with a novel network reduction method between zones based on the similarity Index. Line admittances of reduced network were determined by using the least square method. The proposed method was verified by IEEE 39 bus test system.