• 한국컴퓨터정보학회논문지
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• 제28권2호
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• pp.47-53
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• 2023

본 논문에서는 NFT의 보편화와 대중화를 바탕으로 e-스포츠에서의 NFT 활용 아이디어를 제안하였다. 모든 사용자에게 e-스포츠로의 접근을 쉽게 하고 다양한 연령층에서의 사용자들을 확보하도록 NFT를 활용하는 방안을 고려하였다. 이를 위하여 e-스포츠의 플랫폼에서 다양성을 지닌 NFT의 사례들을 유형별로 분석하고 설문 조사를 통해 e-스포츠에서의 NFT에 대한 활용 정도를 파악하였다. 연구 결과로 e-스포츠 게임 내 NFT 체험이 만족도가 높고, 다시 경험하고 싶은 욕구가 강한 것으로 나타났다. NFT는 소유권과 희소성이 중요한 특징으로 하고 있음으로 e-스포츠에서 독자적인 아이템을 소유하고 싶어하는 요구에 잘 부응할 수 있다. 또한 마케팅에서도 희소성을 가지고 한정판 상품을 홍보함으로, 수익성이 높은 가치 창출을 하는 마케팅 홍보가 가능하다. e-스포츠에서 NFT 활용 시 스포츠의 종류와 관계없이 다양한 NFT 기능이 결합되어 NFT가 경제적 인프라로 자리잡을 수 있다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제7권6호
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• pp.1398-1417
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• 2013

A method is proposed to reduce excess resources from a virtual machine(VM) while avoiding subsequent migrations for a computer cluster that provides cloud service. The proposed scheme cuts down on the resources of a VM based on the probability that migration may occur after a reduction. First, it finds a VM that can be scaled down by analyzing the history of the resource usage. Then, the migration probability is calculated as a function of the VM resource usage trend and the trend error. Finally, the amount of resources needed to eliminate from an underutilized VM is determined such that the migration probability after the resource reduction is less than or equal to an acceptable migration probability. The acceptable migration probability, to be set by the cloud service provider, is a criterion to assign a weight to the resource reduction either to prevent VM migrations or to enhance VM utilization. The results of simulation show that the proposed scheme lowers migration frequency by 31.6~60.8% depending on the consistency of resource demand while losing VM utilization by 9.1~21.5% compared to other known approaches, such as the static and the prediction-based methods. It is also verified that the proposed scheme extends the elapsed time before the first occurrence of migration after resource reduction 1.1~2.3-fold. In addition, changes in migration frequency and VM utilization are analyzed with varying acceptable migration probabilities and the consistency of resource demand patterns. It is expected that the analysis results can help service providers choose a right value of the acceptable migration probability under various environments having different migration costs and operational costs.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권5호
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• pp.2258-2276
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• 2019

Resource sharing is one of the main goals achieved by network virtualization technology to enhance network resource utilization and enable resource customization. Though resource sharing can improve network efficiency by accommodating various users in a network, limited infrastructure capacity is still a challenge to ultra-low latency service operators. In this paper, we propose an inter-slice resource borrowing schema based on the device-to-device (D2D) potentiality especially for ultra-low latency transmission in cellular networks. An extended and modified Kuhn-Munkres bipartite matching algorithm is developed to optimally achieve inter-slice resource borrowing. Simulation results show that, proper D2D user matching can be achieved, satisfying ultra-low latency (ULL) users' quality of service (QoS) requirements and resource utilization in various scenarios.

• Journal of Communications and Networks
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• 제12권5호
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• pp.499-509
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• 2010

A plethora of transmission control protocol (TCP) congestion control algorithms have been devoted to achieving the ultimate goal of high link utilization and fair bandwidth sharing in high bandwidth-delay product (HBDP) networks. We present a new insight into the TCP congestion control problem; in particular an end-to-end delay-based approach for an HBDP network. Our main focus is to design an end-to-end mechanism that can achieve the goal without the assistance of any network feedback. Without a router's aid in notifying the network load factor of a bottleneck link, we utilize goodput and throughput values in order to estimate the load factor. The obtained load factor affects the congestion window adjustment. The new protocol, which is called TCP-goodput and throughput (GT), adopts the carefully designed inversely-proportional increase multiplicative decrease window control policy. Our protocol is stable and efficient regardless of the link capacity, the number of flows, and the round-trip delay. Simulation results show that TCP-GT achieves high utilization, good fairness, small standing queue size, and no packet loss in an HBDP environment.

• 한국정보과학회논문지:시스템및이론
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• 제28권12호
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• pp.632-641
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• 2001

본 논문에서는 병렬컴퓨터의 하이퍼큐브, 메쉬, 트리 위상에서 부하를 재분배할 때 소요되는 계산비용을 줄이기 위한 기법을 제안하였다. 기본 개념은 두가지이다. 첫 번째는 부하를 재분배할 때 각단계마다 발생하는 idle한 링크를 겹쳐서 사용하여 전송하는 방법이며, 두 번째는 이전의 방법에 파이프라인 형태로 부하의 이동을 수행하여 링크를 최대한 사용함으로써 보다 효과적으로 계산비용을 줄이는 방법이다. 즉, idle한 링크가 가능한 발생하지 못하게 부하의 전송에 링크가 적극 참여하도록 함으로써 계산비용을 은닉하는 방법이다. 실험을 통하여 병렬컴퓨터의 위상(하이퍼큐브, 메쉬, 트리)에 따라 기존의 기법들에 두 방법을 적용한 결과, 기존의 기법보다 최소 20%에서 최대 50%의 계산비용이 감소됨을 알 수 있었다.

• International Journal of Computer Science & Network Security
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• 제23권4호
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• pp.123-133
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• 2023

Active queue management (AQM) is a leading congestion control system, which can keep smaller queuing delay, less packet loss with better network utilization and throughput by intentionally dropping the packets at the intermediate hubs in TCP/IP (transmission control protocol/Internet protocol) networks. To accelerate the responsiveness of AQM framework, proportional-integral-differential (PID) controllers are utilized. In spite of its simplicity, it can effectively take care of a range of complex problems; however it is a lot complicated to track down optimal PID parameters with conventional procedures. A few new strategies have been grown as of late to adjust the PID controller parameters. Therefore, in this paper, we have developed a Squirrel search based PID controller to dynamically find its controller gain parameters for AQM. The controller gain parameters are decided based on minimizing the integrated-absolute error (IAE) in order to ensure less packet loss, high link utilization and a stable queue length in favor of TCP networks.

• 한국가금학회지
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• 제23권4호
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• pp.209-219
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• 1996

This research was carried out to get the basic information on the current situation of personal computer utilization for poultry farm management, and the results obtained could be used in developing of the software system for the poultry farm management. Survey method by interview and mail was adopted to carry out the research, and the total number of data used to statistical analyses was k6 poultry farmers. 1. The ratio of the poultry farmers who had the personal computer(P/C) was about 25%, and the most of the layer farmers from age 30 to 40 who manage the flock size 20,000 or above had the P/C. 2. About 70% of the farmers who had P/C have bought the system after 1993, and 83% of those farmers had the P/C-486 or above level system. They bought the P/C with intent to apply it to farm management(39%) and education for children(31%). 3. About 50% of the farmers who had P/C obtained the relevant knowledge for operating computer system by themselves, and the 33% of the P/C-possessed farmers used P/C for word-processor. 4. About 35% of the farmers who had P/C applied their system to analyse the management analyses, and the sarne ratio of the farmers answered that they didn't apply the system to their farm management. 5. About 25% of the farmers who had P/C used package software, and the company which installed the automated cage system offered the software. 6. Most of the farmers considered the computerization of the farm management positively, and they answered that they will apply P/C to their management actively from now on. 7. About 56% of the farmers didn't think that they had sufficient knowledge for operating computer system, and a quarter of them pointed that the difficulty of the buying software for poultry farm management was the most biggest problem to spread out the computerization in the poultry farm. 8. Most of the poultry farmers didn't buy P/C because they didn't have the relevant knowledge for computer system, but they wanted to learn basic knowledge for computer, and they had the intention to apply computer to their management positively. In order to expand the computerization for poultry farm management, appropriate education system for the farmers from age 30 to 40 who manage the flock size 20,000 or above and the development of the software that could be applied to poultry farm management on the spot efficiently should be made.

• 사물인터넷융복합논문지
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• 제10권2호
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• pp.137-148
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• 2024

본 연구의 목적은 리테일테크의 기술활용이 소비자의 구매의도에 어떠한 영향이 있는지를 규명하는 것이다. 더욱이 이러한 영향관계에서 기술 유용성과 용이성의 매개효과를 규명하고, 체험마케팅이 소비자의 구매의도를 조절하는지를 규명하는 것이다. 연구방법은 2023년 8월 1일 부터 2023년 9월 30일까지 설문조사를 실시하였고, 총257명이 연구에 참여하였다. 통계분석은 가설 검증을 위해 위계적 회귀분석, 3단계 매개회귀분석, 위계적 3단계 조절회귀분석을 실시하였다. 연구결과는 다음과 같다. 첫째, 리테일테크 기술 활용에서 빅데이터·AI 활용, 모바일·SNS 활용, 라이브커머스 활용, 사물인터넷 활용이 구매의도에 미치는 것으로 확인되었다. 둘째, 기술 유용성은 사물인터넷 활용, 모바일·SNS 활용, 빅데이터·AI 활용에서 매개효과가 확인되었다. 셋째, 기술 용이성은 사물인터넷 활용, 모바일·SNS 활용, 라이브커머스 활용, 빅데이터·AI 활용 매개효과가 확인되었다. 넷째, 일탈적 체험은 모바일·SNS 활용, 라이브커머스 활용에서 조절효과가 확인되었다. 다섯째, 심미적 체험은 모바일·SNS 활용, 빅데이터·AI 활용에서 조절효과가 확인되었다. 이러한 연구를 통하여 국내 유통산업이 글로벌 시장에 진출하는데 있어 신기술을 활용하여 기업의 경쟁우위를 확보하여 국가 경쟁력에 기여하길 기대한다.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2008년도 제39차 동계학술발표논문집 16권2호
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• pp.485-492
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• 2009

The purpose of this study is to allow all of the instructors including field instructors to understand relation between school education and computer, generalize and analyze basic data required to acquire basic knowledge to help utilizing the computer for education and seek for understanding. This study intented to present a method to activate computer education focused on utilization education at the elementary education stage. Accordingly, those computer educations on middle/high schools and universities and through social educations have been excluded from the object of the study. In order to conduct fruitful computer education, several supporting systems should be equipped completely such as teachers, facilities, software, etc. Especially, practical experience of using computer is the most important element in the computer education, every school should be equipped with computers to prepare for its generalization. Roles of the teachers have also very important influence on it. Research and development of education software require expert knowledge and enormous time and effort and the developed software should be followed by the systematic evaluation on its quality.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권10호
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• pp.4724-4747
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• 2016

To efficiently reduce on-grid energy consumption, the admission control algorithm in the hybrid energy powered cellular network (HybE-Net) with base stations (BSs) powered by on-grid energy and solar energy is studied. In HybE-Net, the fluctuation of solar energy harvesting and energy consumption may result in the imbalance of solar energy utilization among BSs, i.e., some BSs may be surplus in solar energy, while others may maintain operation with on-grid energy supply. Obviously, it makes solar energy not completely useable, and on-grid energy cannot be reduced at capacity. Thus, how to control user admission to improve solar energy utilization and to reduce on-grid energy consumption is a great challenge. Motivated by this, we first model the energy flow behavior by using stochastic queue model, and dynamic energy characteristics are analyzed mathematically. Then, fuzzy logic based admission control algorithm is proposed, which comprehensively considers admission judgment parameters, e.g., transmission rate, bandwidth, energy state of BSs. Moreover, the index of solar energy utilization balancing is proposed to improve the balance of energy utilization among different BSs in the proposed algorithm. Finally, simulation results demonstrate that the proposed algorithm performs excellently in improving solar energy utilization and reducing on-grid energy consumption of the HybE-Net.