• Journal of KIISE:Computing Practices and Letters
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• v.15 no.11
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• pp.831-835
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• 2009

Volunteer computing is a computing paradigm in which the operations of a large-scale application are processed using idle resources of Internet-connected computers. The redundant-work distribution techniques used in the volunteer computing environment cause some problems like delay of the work completion time or inefficiency of the work execution due to continuous requests of the work redistribution because the techniques do not consider the characteristics of works and dynamic resources. To cope with such problems this paper suggests a P2P based regional matchmaking technique which can redistribute works in consideration of the characteristics of the works and the participant resources. The techniques consist of the profiles for works/resources, the module for monitoring the available resources spaces, the protocols for the matching request/reply, the module for match-ratio calculation, and so on.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.1A
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• pp.30-37
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• 2006

In this paper, we propose a QoS-aware efficient bandwidth re-provisioning scheme in a next generation wireless packet transport network. At the transport network layer, it classifies the traffic of the radio network layer into a real time class and a non-real time class. Using an auto-regressive time-series model and a given packet loss probability, our scheme predicts the needed bandwidth of the non-real time class at every re-provisioning interval. Our scheme increases the system capacity by releasing the unutilized bandwidth of the non-real time traffic class for the real-time traffic class while insuring a controllable upper bound on the packet loss probability of a non-real time traffic class. Through empirical evaluations using the real Internet traffic traces, our scheme is validated that it can increase the bandwidth efficiency while guaranteeing the quality of service requirements of the non-real time traffic class.

• Journal of Agricultural Extension & Community Development
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• v.19 no.4
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• pp.989-1020
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• 2012

The purpose of this study is to look into current situation and perception of empty homes owners' managing and using rural empty houses. This topic is important because basic data has to be broadly accumulated to facilitate using empty houses as an idle resources in rural areas. Besides, the demand of urban migrants' using empty houses as an economic house or temporary house keeps increasing. We called 2012 respondents who had empty houses in Wanju County. The questionnaire consisted of current situation of empty homes owners' managing and using empty house, plan of using empty house, perception of using empty house and demographic factors of respondents. As a result, we identified each characteristics of the owner of empty house, the empty house, and the place where the empty house was located. Futhermore, by analysing the behavior and perception of the owner of empty house by those characteristics, we suggested the direction of government's support for facilitating reusing rural empty houses.

• Journal of Service Research and Studies
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• v.8 no.4
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• pp.1-12
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• 2018

This study suggests a way to implement shared economic model of educational service in service era. As most shared economic models are innovating high-cost, low-quality structures in existing economies, there is a need for innovation models that improve high-cost low-quality structures to high-quality, low-cost structures in education services. Especially, since higher education and lifelong education are in urgent need of innovation, this study studied shared university model focused on higher education and lifelong education. In order to provide educational services at low cost and high quality, it is necessary to use idle resources, so it is necessary to introduce a shared economic model. Shared universities require a more efficient and effective supplier quality control, as the existing limited supplier group become widespread. Normative quality control is also needed to cultivate students as competent talent. In addition, in order to provide high-quality higher education services at a low cost, it is necessary to base the process quality management using advanced science and technology. Therefore, educational service quality management is a process of quality control that is well-balanced in terms of suppliers, customers, and processes.

• Journal of the Korea Convergence Society
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• v.10 no.5
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• pp.181-188
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• 2019

People can easily use a shared economic service system based on ICT technology. Most of the shared economic services are provided by private companies, and discussion on public goods is insufficient. If we look at the current shared economic service from the point of view of courier service, $\ddot{U}ber^{\prime}s$ system can be an alternative. The post office courier service uses ICT technology but differs from the service of the shared economy. This study uses Delphi analyzer method and AHP methodology to derive important factors in introducing shared economic system. As a result, socioeconomic characteristics were found to be the most important in the upper tier, and the shared economic platform, sharing of idle resources, popularization of smartphone, and increase of e - commerce were the four important factors in the lower tier. In order to maximize efficiency, which is the essence of the shared economy, the necessity of introduction into the shared economic system and important factors in the introduction of public goods are presented.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2019.05a
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• pp.413-415
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• 2019

In this paper, we develop IoT-HiAS(IoT-Human Interactive Advertising Service) for sharing economy. The HiAS device shooting the front of the device via a webcam and recognizes the person in real time through the SSD model using MobileNet. If the number of persons above the set threshold is recognized by counting the recognized person, the advertisement is reproduced on the idle resource through the beam projector. At the same time as the advertisement is reproduced, the captured image of the advertisement start time in the front of the device and the number of recognized persons are sends the IoT server of an oneM2M-compliant HiAS server using the IoT client. When the advertisement is finish, the webcam is shooting the front of the device and the image is sends the IoT server. We implemented the IoT-based human interactive advertising service by transmitting the received data to the advertiser and the advertising producers through the SNS(Social Network Service) agent of the HiAS server.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• v.10 no.2
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• pp.81-88
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• 2006

The advent of supercomputers contribute greatly in overcoming scientific and academic problems that were previously difficult to solve. However, the supercomputer itself suffers from the problem of being considerable cost. In response, the concept of grid computing, to use the resources of distribute computers connected with each other, was created. This system uses connection oriented protocols to integrate and manage the resources of different types of distributed systems, yet it has the problem of compatibility between protocols of other types. In this paper, a system to manage grid network performance through XML-based SOAP web service which is platform-independent, is proposed.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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• pp.374-376
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• 2017

현재 인터넷과 스마트폰은 새로운 형태의 비즈니스와 새로운 스타 기업을 만들어 내고 있다. 그 중 최고 주목을 받고 있는 공유경제 비즈니스는 엄청난 잠재가치와 성장 가능성으로 관심을 받고 있다. 쏘카, 빌북, 등의 여러 공유경제 비즈니스 들은 활용되지 않는 유휴 자원을 타인과 공유하여 불필요한 소비 자원의 낭비를 줄이고 궁극적으로는 사회 공동의 이익 증가에 기여하는 경제활동이자 대안적 사회운동으로 정의 된다. 이러한 공유경제 사회에서 아이디어, 개발 작품의 공유, 아이디어 확장, 구현을 목표로 하는 시스템을 개발 하고자 한다. 연구를 목적으로 하는 조직이나 단체에서 어떠한 사람이 아이디어나 구현한 개발 작품 하나를 공유하면 그것은 하나의 노드가 되고 그 노드에서부터 다른 사람들이 보고 관심 있는 아이디어나 개발 작품을 가지고 덧붙여 업그레이드를 하면 트리형태로 확장하여 직관적으로 보여줄 수 있다. 또한, 연결되는 노드에 코멘트를 달아 개선 사항을 확인할 수 있고, 비슷한 아이디어나 개발 작품을 연결해 그래프(망)형으로 확인할 수 있다. 하나의 아이디어에서 여러 가지가 나가는 브레인스토밍과 같은 결과로 하나의 아이디어에 가치를 높일 수 있다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.8
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• pp.1606-1612
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• 2012

Cognitive radio technology enables us to utilize the extra spectrum which is not used by the primary users by sensing the channel condition. To use such an extra spectrum, spectrum allocation is one of the important issues in the cognitive radio networks. The network is dynamic and the available channels are changeable, and the opportunistic channel allocation is required to use the resource efficiently without interference to the primary networks. In this paper, modified proportional fairness scheduling is proposed for cognitive radio networks to satisfy the both fairness and system throughput, and the modified scheduling was designed to reduce the interference to the primary users.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.2
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• pp.658-661
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• 2005

Internet-based client/server architecture of Contents Delivery System suffers from frequent disconnections and security treats caused by dependency of the server or overload. But, We reached the limit to the increase of the server because a contents quality enhance and Internet user explosively increase. Therefore, a P2P based computing methods are used for sloving these issues. In this paper, We implement and design the Education Content Delivery System for cyber education system using idle Computing Power in P2P computing to share computing resources. We implement not only Internet infrastructure but also satellite infrastructure system, and designed to transfer real-time or non real-time contents.