• The Journal of the Korea institute of electronic communication sciences
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• v.1 no.2
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• pp.102-109
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• 2006

In this paper, we improve the performance of bidirectional TCP connection over end-to-end network that uses transfer rate-based flow and congestion control. The sharing of a common buffer by TCP packets and acknowledgement has been known to result in an effect called ack compression, where acks of a connection arrive at the source bunched together, resulting in unfairness and degraded throughput. The degradation in throughput due to bidirectional traffic can be significant. For example, even in the simple case of symmetrical connections with adequate window size, the connection efficiency is improved about 20% for three levels of background traffic 2.5Mbps, 5.0Mbps and 7.5Mbps. Otherwise, the throughput of jitter is reduced about 50% because round trip delay time is smaller between source node and destination node. Also, we show that throughput curve is improved with connection rate algorithm which is proposed for TCP congestion avoidance as a function of aggressiveness threshold for three levels of background traffic 2.5Mbps, 5Mbps and 7.5Mbps.

• The KIPS Transactions:PartA
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• v.14A no.7
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• pp.451-456
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• 2007

In this paper, we regard computer systems as heterogeneous multi-server systems and propose a cumulative fair scheduling scheme that pursues long-term fairness. GPS(generalized processor sharing)-based scheduling algorithms, which are usually employed in single-server systems, distribute available capacity in an instantaneous manner. However, applying them to heterogeneous multi-server systems may cause unfairness, since they may not prevent the accumulation of scheduling delays and the extra capacities are distributed in an instantaneous manner. In our scheme, long-term fairness is pursued by proper distribution of extra capacities while guaranteeing reserved capacities. A reference capacity model to determine the ideal progresses of applications is derived from long-term observations, and the scheduler makes the applications gradually follow the ideal progresses while guaranteeing their reserved capacities. A heuristic scheduling algorithm is proposed and the scheme is examined by simulation.

• The Journal of the Korea Contents Association
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• v.18 no.8
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• pp.434-445
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• 2018

This study examined whether mobile OTT video service substitutes home TV by using 3 screen data of Nielson-KoreanClick. According to the 2SLS estimation results, when the time spent on mobile OTT video service increased by 1% p, the time spent watching home TV decreased by 12.4%. The results also showed that 1%p increase in the time spent using YouTube app and the mobile OTT video services provided by telecommunication company(Oksusu, Alleh TV, VideoPortal) reduced the time spent on watching terrestrial channels on TV by 16.2% and 23.9%, respectively. The displacement of mobile OTT video service on home TV will be accelerated in the near future. In order to resolve the issue of regulatory unfairness with pay TV services and to safeguard viewer's interests, discussions to establish regulation for OTT video services should be taken place more quickly.

• Journal of the Korean Society for information Management
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• v.37 no.3
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• pp.203-220
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• 2020

With the COVID-19 pandemic being prolonged, the society is being converted into an untact society, thereby affecting the service methodology of domestic and foreign library systems. This study thus surveyed the librarians' awareness of COVID-19 response measures of public libraries, and proposed public libraries' response measures in situations where the novel infectious disease is spreading and prolonging. Specifically, the proposed measures include, first, preparing national-centered library countermeasures to jointly respond to the epidemic disease, second, strengthening various untact and online services of various public libraries through government-level budget support, third, a thorough prevention of epidemics and preemptive response from the viewpoint of employees and users, and fourth, the expansion of library services aimed at resolving the digital cultural divide among classes of people, including information unfairness.

• Journal of Distribution Research
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• v.9 no.3
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• pp.21-47
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• 2004

This study has investigated the effects of relieving and promoting factors on dissolution intention under the condition of low commitment buyer-seller relationships. Based on intensive literature reviews, eight alleviating factors (dependence, cooperation, communication, relational norms, transaction specific investments, relationship termination costs, satisfaction, and trust) and five promoting factors (opportunism, conflict, goal incongruity, attractiveness of alternatives, and unfairness) were included. A total of thirteen hypotheses were testee using data collected from a dining franchising system. Among 300 collected, 79 cases of low commitment buyer-seller relationships were analyzed. The results showed that eight out of thirteen hypotheses were supported. But five hypotheses related to the variables of cooperation, transaction specific investments, relationship termination costs, attractiveness of alternatives, and opportunism were not supported. following a detailed presentation of the analysis results, the paper concludes by discussing the academic and managerial implications of the findings.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.3A
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• pp.230-236
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• 2007

This paper presents a resource management mechanism for the mesh networking in IEEE 802.15.3 High-rate WPAN. IEEE 802.15 TGS is standardizing the MAC and PHY for mese networking. This task group researches the mechanism that are extension of network coverage without increasing transmit power of receive sensitivity, and studies the enhanced reliability via route redundancy. In this paper we propose the distributed resource management scheme that is fairly using the channel resource in the piconet without centralized piconet coordinator. Each DEV reserves the channel time and broadcasts its information. This scheme has unfairness for later associated DEV because of preoccupation of earlier associated DEVs. This paper presents the method that fairly allocates the channel time in MAC layer. And we evaluate the performance enhancement using simple simulations.

• Journal of Institute of Control, Robotics and Systems
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• v.19 no.7
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• pp.653-660
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• 2013

This paper deals with the problem of unfairness among uplink TCP (Transmission Control Protocol) flows associated with frame aggregation employed in IEEE 802.11n WLANs (Wireless Local Area Networks). When multiple stations have uplink TCP flows and transmit TCP data packets to an AP (Access Point), the AP has to compete for channel access with stations for the transmission of TCP ACK (acknowledgement) packets to the stations. Due to this contention-based channel access, TCP ACKs tend to be accumulated in the AP's downlink buffer. We show that the frame aggregation in the MAC (Medium Access Control) layer increases TCP ACK losses in the AP and leads to the serious unfair operation of TCP congestion control. To resolve this problem, we propose the TAC (TCP ACK Compression) mechanism operating at the top of the AP's interface queue. By exploiting the properties of cumulative TCP ACK and frame aggregation, TAC serves only the representative TCP ACK without serving redundant TCP ACKs. Therefore, TAC reduces queue occupancy and prevents ACK losses due to buffer overflow, which significantly contributes to fairness among uplink TCP flows. Also, TAC enhances the channel efficiency by not transmitting unnecessary TCP ACKs. The simulation results show that TAC tightly assures fairness under various network conditions while increasing the aggregate throughput, compared to the existing schemes.

• Journal of Arbitration Studies
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• v.26 no.1
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• pp.3-27
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• 2016

There is a need for disputes in sports to be settled by arbitration rather than a court ruling, taking the unique characteristics of sports into consideration. Arbitration is a form of alternative dispute resolution (ADR). A dispute resolution system is regarded as: an arbitrator is selected by the agreement between the parties, and a binding decision is made, which the parties obey, consequently resulting in a final resolution. To resolve a dispute upon arbitration, there must be an arbitration agreement upon the free will of the parties. In relation to the arbitration agreement, however, there are some cases in which sports organizations have an arbitration clause in the articles of association, regulations or player registration application that call for settling disputes by arbitration. In such cases, the validity of the arbitration agreement may create doubt whether or not this sort of arbitration has been made by mutual agreement. Consequently this is required to be legally examined. The activities of a sports organization are recognized as part of private autonomy, and they include even the rights that establish regulations or rules. Nonetheless, the powers that such sport organizations are able to establish are not allowed without limit. However, sports activities and autonomy shall be protected as themselves. Therefore, if we give priority to arbitration upon the independent arbitrator and fair process by establishing an independent arbitral organization in charge of sports disputes to handle the effective resolution of disputes and protect sports autonomy and ask for a court decision if one party disobeys the arbitration, or the sports arbitration prepositive principle, it seems helpful to resolve the unfairness of compulsory jurisdiction and the clause for sports arbitration and protect the player's right of choice and of claims for trial.

• Journal of the Institute of Electronics and Information Engineers
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• v.50 no.7
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• pp.131-139
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• 2013

To overcome the limitations in performance and power consumption of traditional electrical interconnection based network-on-chips (NoCs), a hybrid optical network-on-chip (HONoC) architecture using optical interconnects is emerging. However, the HONoC architecture should use circuit-switching scheme owing to the overhead by optical devices, which worsens the latency unfairness problem caused by frequent path collisions. This resultingly exert a bad influence in overall performance of the system. In this paper, we propose a new task mapping algorithm for optimizing latency by reducing path collisions. The proposed algorithm allocates a task to a certain processing element (PE) for the purpose of minimizing path collisions and worst case latencies. Compared to the random mapping technique and the bandwidth-constrained mapping technique, simulation results show the reduction in latency by 43% and 61% in average for each $4{\times}4$ and $8{\times}8$ mesh topology, respectively.

• Journal of Arbitration Studies
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• v.7 no.1
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• pp.411-446
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• 1997

This paper reports the results of an experimental companson of the winning rates in arbitral awards between the Korean Commercial Arbitration Board and the Japan Commercial Arbitration Association, and analyzed the comparative advantages of KCAB in international arbitration compared with ICC. There are so many factors to analyze the level of internationalizaton and competitiveness in the arbitration. From the recent lituratures, arbitration experts reported and debated tremendous elements which is vital to have a competition in the international arbitration market. Arbitration factors such as fairness, reliability, awareness, extension, enforcement, inexpensiveness, closed and expedited proceedings, arbitrators, expert knowledge, service, arbitral award, etc. are very important to appraise the level of the globalization and competitiveness of arbitration organizations Using these factors, I appraised current level of the globalization and competitiveness of the Korean Commercial Arbitration Board, unique arbitration organization in South Korea. Next, we are able to compare the level of fairness using the concept of 'winning rate' All over the world, only several arbitration organizations published and opened their own arbitral awards even In anonymity. The Japanese arbitration institutions published it regularly as well as the Korean When compared with these two institutions' "winning rates". there is similiar tendency in favor of domestic corporations That is to say, the winning rates in domestic arbitration cases are greater than those in international arbitration cases. This embarks an implication of unequality, a part of unfairness, in these two countries' arbitration. Finally, an analysis was conducted between the statistics of KCAB and ICC, especially to the focus on the number of arbitration cases, arbitration tribunals, arbitration places, parties' nationalities. the types of contents, the amount of arbitration, arbitration costs. There are two meanings to keep in mind for advancement of Korean arbitration. One is to establish new strategy specializing in small amount arbitration less than US$200,000. The other is to rearrange the panel of arbitration, especially in increasing field of arbitration cases such as the disputes of license, technology transfer, patent, etc.