• 대한교통학회지
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• 제34권6호
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• pp.523-534
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• 2016

본 연구는 수도권지역을 운행하는 광역버스를 대상으로 차내혼잡도 완화의 편익측정방법론 개발을 목적으로 하고 있다. 비시장재의 편익측정방법론에 대한 조사, 분석을 통해서 조건부가치측정법을 조사기법으로, Tobit모형을 측정모형으로 선정하였다. 설문조사를 통해서 992개의 유효표본이 얻어졌으며 연령, 소득수준, 버스탑승시간, 통행목적, 혼잡도 등을 설명변수로, 광역버스 차내혼잡도 완화에 대한 추가지불의사액을 종속변수로 하는 Tobit모형을 추정하였다. 통계적 검정과 논리적 검정을 통해서 모형의 적합도가 검정되었으며 모형으로부터 산출된 광역버스 차내혼잡도 완화에 대한 추가지불의사액을 경기도가 인가한 광역버스 이용실태에 적용한 결과, 수도권 지역에서 광역버스 좌석제를 시행할 경우 일평균 약 61백만 원, 연간 약 147억 원의 편익이 발생할 것으로 추정되었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 추계학술대회 논문집 전력기술부문
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• pp.159-161
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• 2005

Transmission congestion is one of the key factors to local market power in competitive electricity markets. Financial transmission rights provide the financial protection to their holders by paying back the congestion cost. However, the market participants who have market power can exacerbate their market power. Due to the exacerbated market power, this paper analyzes the mitigation of local market power using Contingent transmission rights on the market price. Contingent transmission rights provide not only the financial protection but also regulative penalty. The proposed methodology was demonstrated with the Optimal Power Flow(OPF).

• 전기학회논문지
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• 제56권2호
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• pp.268-276
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• 2007

Transmission congestion is one of the key factors to local market power in competitive electricity markets. Financial transmission rights provide the financial protection to their holders by paying back the congestion rent. A variety researches have shown that the existing trading mechanisms on transmission right can exacerbate market power. This paper proposes an alternative methodology in mitigating the local market power using the Contingent Transmission Rights on the locational marginal pricing scheme. The proposed methodology was demonstrated with the Optimal Power Flow.

• 대한전기학회논문지:전력기술부문A
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• 제52권10호
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• pp.610-615
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• 2003

With the growing competitive pressure from market participants, utilities, consumer and government, analyses of existing competitive electricity market become more important. The presence of congestion in the transmission system can significantly increase the potential of exercising market power. Since the congestion in the network depends on the several factors, the market power cannot be simply analyzed through the existing indices. This paper presents a systematic analysis on local market power under uniform pricing scheme and provides determining approach of the level of price cap as mitigation measure of the strategic market power.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권4호
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• pp.2002-2019
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• 2017

RPL routing protocol for low-power and lossy networks is an Internet Engineering Task Force (IETF) recommended IPv6 based protocol for routing over Low power Lossy Networks (LLNs). RPL is proposed for networks with characteristics like small packet size, low bandwidth, low data rate, lossy wireless links and low power. RPL is a proactive routing protocol that creates a Directed Acyclic Graph (DAG) of the network topology. RPL is increasingly used for Internet of Things (IoT) which comprises of heterogeneous networks and applications. RPL proposes a single path routing strategy. The forwarding technique of RPL does not support multiple paths between source and destination. Multipath routing is an important strategy used in both sensor and ad-hoc network for performance enhancement. Multipath routing is also used to achieve multi-fold objectives including higher reliability, increase in throughput, fault tolerance, congestion mitigation and hole avoidance. In this paper, M-RPL (Multi-path extension of RPL) is proposed, which aims to provide temporary multiple paths during congestion over a single routing path. Congestion is primarily detected using buffer size and packet delivery ratio at forwarding nodes. Congestion is mitigated by creating partially disjoint multiple paths and by avoiding forwarding of packets through the congested node. Detailed simulation analysis of M-RPL against RPL in both grid and random topologies shows that M-RPL successfully mitigates congestion and it enhances overall network throughput.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 추계학술대회 논문집 전력기술부문
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• pp.101-104
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• 2002

With the growing competitive pressure from market participants, utilities, consumer and government, analyses of existing competitive electricity market become more important. The presence of congestion in the transmission system can significantly increase the potential of exercising market power. Since the congestion in the network depends on the several factors. the market power cannot be simply analyzed through the existing indices. This paper presents a systematic analysis on local market power under uniform pricing scheme and provides some mitigation of the strategic market power.

• 국제학술발표논문집
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• The 4th International Conference on Construction Engineering and Project Management Organized by the University of New South Wales
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• pp.653-658
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• 2011

Construction works of civil infrastructure projects generate a considerable amount of carbon emissions by utilizing a set of energy-intensive equipment and causing traffic congestion. However, the voluntary efforts of the contractor to mitigate these emissions are at an early stage. To address this issue, this paper explores the opportunities to take carbon emissions that would be caused from construction works into consideration in contracting methods and procedures. The opportunities for reducing carbon emissions from construction activities themselves are examined under the framework of Performance Contracting for Construction (PCfC), and carbon emissions from traffic congestion are attempted to be incorporated into the Road User Cost (RUC) calculation. This paper also identifies and discusses major challenges that must be confronted when considering the mitigation of these emissions in contracting methods and procedures.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2018년도 춘계학술대회
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• pp.57-58
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• 2018

사물인터넷에 대한 관심이 증가하면서 사물인터넷을 활용하여 사물 간 주고받은 정보를 처리하는 기술들이 연구되고 있다. 특히 컨테이너 터미널이 자동화 됨에 따라 터미널 내에 사물인터넷의 사용이 증가하고 다양화되었다. 그러나 컨테이너 터미널 운영의 효율성을 향상시키기 위한 사물인터넷의 활용은 미흡한 단계이다. 현재 컨테이너 터미널은 외부 트럭의 도착패턴이 특정시간에 집중되는 현상이 나타난다. 이에 따라 게이트 혼잡이 발생하고 트럭의 대기시간에 영향을 준다. 이로 인해 항만 인근지역의 환경오염 문제, 사회적 문제 등으로 피해가 발생한다. 따라서 본 논문에서는 컨테이너 터미널의 게이트 혼잡도에 영향을 미치는 외부트럭의 대기시간 문제의 원인을 분석하고 사물인터넷 환경에서 이를 완화하기 위한 방안을 연구하고자 한다.

• 대한전기학회논문지:전력기술부문A
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• 제54권3호
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• pp.139-143
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• 2005

Several methods have been proposed to mitigate the market power in foreign electricity markets. In this paper, Hirfindahl-Hirschman Index(HHI) and supply margin assessment(SMA) are compared based upon the Korean future markets. The results show that SMA is better than HHI to estimate market power because it can reflect congestion and capacity reserve effectively.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 A
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• pp.649-651
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• 2003

In the framework of competitive electricity market, the Market Power due to the transmission congestion, lack of demand-side response, various uncertain factors etc. have been significant problem. This paper reviews the market rules of Korea power system and the uplift scheme for constrained on/off generators. Then, this paper points out several problems and the mitigation measures of local market power concerning the compensation for constrained-off generators.