• Annual Conference of KIPS
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• 2002.11b
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• pp.1197-1200
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• 2002

본 논문에서는 GFR이 요구하는 최소 전송률 보장과 높은 공평성을 제공하기 위하여 퍼지 이론을 이용한 버퍼관리 알고리즘을 제안하였다. 제안된 알고리즘은 태깅정보, 전체 버퍼의 점유량, VC의 부하 정도로 구성된 세 개의 파라미터를 이용하여 패킷 폐기를 결정한다. 시뮬레이션 결과 MCR의 크기가 커질수록 제안된 알고리즘의 수율과 공평성이 우수하였으며. 스위치에서 버퍼의 크기 변화에서도 Double-EPD나 DFRA는 비슷한 성능을 보였고, 제안된 알고리즘은 좋은 수율과 공평성을 제공한다.

• The Journal of the Korea Contents Association
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• v.5 no.5
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• pp.248-254
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• 2005

The existing buffer management scheme is caused by with burstness characteristic of the TCP traffic and with only the transmission which is not loss it provides the smallest transmission rate guarantee where the GFR demands and a fair characteristic. In order to provide a high fair characteristic from the dissertation which it sees with the smallest transmission rate guarantee where the GFR demands it proposed the existing buffer algorithm which applies a Fuzzy mechanism in the existing buffer management technique. The proposed algorithm decides a packet disuse used by three parameters which are composed of tagging information, the buffer usage, and the load of VC. Simulation results shows that the fairness and goodput of the proposed algorithm were excellent where the size of MCR will become larger, from the switch the Double-EPD or the DFBA was visible a similar efficiency even from size change of the buffer. The algorithm which is proposed provides a good throughput and a fair characteristic.

• Journal of KIISE:Computer Systems and Theory
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• v.37 no.6
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• pp.348-353
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• 2010

A threshold decryption scheme is a multi-party public key cryptosystem that allows any sufficiently large subset of participants to decrypt a ciphertext, but disallows the decryption otherwise. When performing a threshold decryption, a third party is often involved to guarantee fairness among the participants. To maintain the security of the protocol as high as possible, it is desirable to lower the level of trust and the amount of information given to the third party. In this paper, we present a threshold decryption scheme which allows the anonymity of the participants as well as the fairness by employing a semi-trusted third party (STTP) which follows the protocol properly with the exception that it keeps a record of all its intermediate computations. Our solution preserves the security and fairness of the previous scheme and reveals no information about the identities of the participants and the plaintext even though an attacker is allowed to access the storage of the STTP.

• Journal of KIISE:Computer Systems and Theory
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• v.36 no.4
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• pp.291-303
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• 2009

Round robin based proportional share scheduling(RRPS) defines weight which determines share for each task and allocates CPU resource to each task in proportional to its respective weight. RRPS uses fairness as the measure of performance and aims at high fairness of scheduling. However, researches for scheduling fairness problem due to synchronization among tasks have been rarely investigated. In this paper, we discuss that scheduling delay due to synchronization may result high unfairness in RRPS. We explain such a situation as weight inversion. We then propose weight inheritance protocol(WIP), a synchronization mechanism, that prevents weight inversion. We also show that WIP can reduce unfairness using fairness analysis and simulation.

• Journal of the Institute of Convergence Signal Processing
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• v.5 no.1
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• pp.79-83
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• 2004

The purpose of ATM traffic management is to protect the network using minimum resources and guarantee the requred QoS and also it is desirable to provide fairness between input channels. In this paper, we propose the TBBM(threshold based buffer management) algorithm to improve fairness between input channels and utilization of ATM networks. TBBM algorithm controls output cell rate dynamically based on threshold. The result shows that the required bandwidth of the TBBM algorithm is 14.3% lower in audio traffic and 41.8% lower in video traffic than that of theoretically calculated equivalent capacity method. and also reveals that the TBBM algorithm provide improved CLR fairness between input channels

• Journal of Korea Port Economic Association
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• v.29 no.2
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• pp.1-17
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• 2013

This paper aims to review the fairness of carriers' incentive schemes at Gwangyang port in 2010 and to show the desirable incentive allocation rules using the proportional and egalitarian rules under cooperative game theory. The carriers' incentive schemes at Gwangyang port in 2010 did not meet the no-envy and the efficiency, and satisfy the symmetry axiom. According to the research findings, the equal surplus method satisfies the axioms of equity, efficiency, symmetry, and progressivity. However, the uniform losses method meets the axioms of equity, efficiency, symmetry, and regressivity. We use a single allocation criterion of the total throughput to show the regressivity and the symmetry principles into the incentive scheme instead of using multiple criteria such as total throughput, increased volume, and coastal volume. The uniform losses method based on the total throughput can distribute the incentive amount according to the intent of the incentive schemes. Hence, we need to establish a rationing system to allocate reasonably the total amount of different types of incentives, avoiding the temptation to adjust the volume shipped between the ports of carriers considering the efficiency of allocation.

• Journal of Engineering Education Research
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• v.13 no.1
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• pp.38-51
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• 2010

This article is a theoretical and empirical study of engineering and gender, and also explores the policy development of WIE program. WIE in Korea aims to foster talented women engineers through the introduction of gender-sensitive engineering education system, field-adaptive skill improvements of women students, and industry-university collaborations. This study examines gender perspectives to analyze our WIE program. It is important to recognize that it's not enough to acquire institutional and structural equity in developing women in engineering. Above all, we should note our situations that has frustrated women's career development in engineering. In university education, we need to improve the engineering faculty's recognition of gender equity. Efforts to establish the professional identity of women engineers, involvement of men and women students, and building of women engineers' network are necessary elements to implement successful WIE program. Additionally, we discuss that policy support to WIE program should be continued and enlarged in university level.

• Proceedings of the Korea Water Resources Association Conference
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• 2008.05a
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• pp.1472-1476
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• 2008

남북 공유하천은 크게 임진강과 북한강으로 대별된다. 이중 임진강은 2000년을 기점으로 상호 협력방안이 모색되고 있다. 그러나 북한강수계에서는 북한이 유역변경을 위해 대댐을 건설하여 운영중에 있는 등 남북관계에 있어서 협력과 갈등이 공존하고 있는 상황이다. 국제공유하천에 있어 수자원 개발과 이용은 협력과 공평성에 기초하여야 한다. 그러나 갈등은 모든 국제하천이 가지고 있는 공통의 문제로 해결을 위한 대안마련에 많은 노력이 필요하다. 그럼에도 국 내외의 사례에서 볼 수 있듯이 예방적 조치들이 미약한 것이 현실이다. 남 북한 공유하천에서도 수자원 이용과 관련된 문제점은 계속되고 있다. 특히, 북한강 수계의 경우 상류유역을 점하고 있는 북한이 임남댐을 건설해 유역변경 수력발전을 함으로서 하류를 점하고 있는 남한지역에서는 하천관리 및 용수공급 등 지장을 받고 있다. 얼마 전에는 댐의 안정성 문제가 제기되어 국가안보 차원에서 문제를 다루어야 할 정도로 중대 사안이 되었다. 임진강 유역에서는 수해방지를 위한 남 북한간 협력체제의 토대가 마련되어 가고 있지만 황강댐의 유역변경 이 구체화될 경우 문제는 더욱 복잡해진다. 본 연구에서는 국제공유하천의 갈등해소 이론을 바탕으로 보다 현실적인 접근방법을 대안으로 제시하고자 하였다.

• KDI Journal of Economic Policy
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• v.11 no.2
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• pp.45-64
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• 1989

본고(本稿)는 시장진입(市場進入)에 대해 시장기능(市場機能)에 맡기기를 주장하는 자유경제주의(自由經濟主義)(laissaire faire)와 정부개입(政府介入)을 주장하는 산업정책주의(産業政策主義)(industrial policy)간의 논란(論難)에 대해서 일발적인 이론(理論)을 비교설명하고 석유화학산업(石油化學産業)의 예(例)를 듦으로써 공업발전법(工業發展法) 운용방안(運用方案)에 대한 몇가지 기준(基準)을 제시하려 하였다. 1986년에 발효(發效)된 공업발전법(工業發展法)은 합리화지정(合理化指定)을 통한 시장진입(市場進入)을 제한(制限)함에 있어서 구체적인 기준의 제시없이 2개의 협의회(協議會)에 위임하고 있어 일관성(一貫性) 및 공평성(公平性)의 결여로 사회적(社會的) 비용(費用)이 발생될 우려가 있으며, 본고(本稿)의 분석결과(分析結果)를 토대로 합리화산업지정(合理化産業指定)에 대한 몇가지 기준(基準)을 제시하였다.

• KIPS Transactions on Computer and Communication Systems
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• v.12 no.10
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• pp.299-308
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• 2023

As the spectrum shortage problem has accelerated by the emergence of various services, New Radio-Unlicensed (NR-U) has appeared, allowing users who communicated in licensed bands to communicate in unlicensed bands. However, NR-U network users reduce the performance of Wi-Fi network users who communicate in the same unlicensed band. In this paper, we aim to simultaneously maximize the fairness and throughput of the unlicensed band, where the NR-U network users and the WiFi network users coexist. First, we propose an optimal power allocation scheme based on Monte Carlo Policy Gradient of reinforcement learning to maximize the sum of rates of NR-U networks utilizing rate-splitting multiple access in unlicensed bands. Then, we propose a channel occupancy time division algorithm based on sequential Raiffa bargaining solution of game theory that can simultaneously maximize system throughput and fairness for the coexistence of NR-U and WiFi networks in the same unlicensed band. Simulation results show that the rate splitting multiple access shows better performance than the conventional multiple access technology by comparing the sum-rate when the result value is finally converged under the same transmission power. In addition, we compare the data transfer amount and fairness of NR-U network users, WiFi network users, and total system, and prove that the channel occupancy time division algorithm based on sequential Raiffa bargaining solution of this paper satisfies throughput and fairness at the same time than other algorithms.