• 한국컴퓨터정보학회논문지
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• 제21권8호
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• pp.41-48
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• 2016

In this paper, we propose an election protocol based on mobile ad-hoc network. In distributed systems, a group of computer should continue to do cooperation in order to finish some jobs. In such a system, an election protocol is especially practical and important elements to provide processes in a group with a consistent common knowledge about the membership of the group. Whenever a membership change occurs, processes should agree on which of them should do to accomplish an unfinished job or begins a new job. The problem of electing a leader is very same with the agreeing common predicate in a distributed system such as the consensus problem. Based on the termination detection protocol that is traditional one in asynchronous distributed systems, we present the new election protocol in distributed systems that are based on MANET, i.e. mobile ad hoc network.

• 한국환경복원기술학회지
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• 제7권2호
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• pp.96-105
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• 2004

Throughout the modernization which was dominated by development theory in Korea, land use planning for housing tended to spoil the environment. Numerous studies, however, pointed out the problem of this development-led planning and there was a broader consensus that the past planning was part of the environmental problem of inner city. These observations changed the development-led planning into the environmental friendly development planning. In particular, Seoul Metropolitan Government held the international planning competition to develop 'Sangam' as an environment friendly residential area. With this plan 'Sangam' would be the sustainable residential area with the harmony of nature, human and technology. Furthermore it would be the outset of the long-term plan to develop 'Seoul' as a 'gate-city, an 'information-city' and an 'eco-city'. To do this, it needs especially the planners' and the constructors' constant concerns and efforts as well as the citizen's participation.

• 전자공학회논문지B
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• 제33B권3호
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• pp.169-175
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• 1996

In this paper, a new parallel neural network system that performs dynamic competitive learning is proposed. Conventional learning mehtods utilize the full dimension of the original input patterns. However, a particular attribute or dimension of the input patterns does not necessarily contribute to classification. The proposed system consists of parallel neural networks with the reduced input dimension in order to take advantage of the information in each dimension of the input patterns. Consensus schemes were developed to decide the netowrks performs a competitive learning that dynamically generates output neurons as learning proceeds. Each output neuron has it sown class threshold in the proposed dynamic competitive learning. Because the class threshold in the proposed dynamic learning phase, the proposed neural netowrk adapts properly to the input patterns distribution. Experimental results with remote sensing and speech data indicate the improved performance of the proposed method compared to the conventional learning methods.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권8호
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• pp.3224-3242
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• 2020

Internet of Things (IoT) networks composed of a large number of sensors and actuators generate a huge volume of data and control commands, which should be enforced by strong data reliability. The end-to-end data reliability of IoT networks is an essential industrial enabler. Blockchain technology can provide strong data reliability and integrity within IoT networks. We designed a lightweight end-to-end blockchain network that applies to common IoT applications. Its enhanced modular architecture and lightweight consensus mechanism guarantee its practical applicability for general IoT applications. In addition, the proposed blockchain network is highly software compatible because it adopts the Hyperledger development environment. Directly embedding the proposed blockchain middleware platform in small computing devices proves its practicability.

• 한국컴퓨터정보학회논문지
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• 제20권11호
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• pp.151-156
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• 2015

Recently, the government tends to address the health policy as an economic logic. However, health policy must be priority to national health right than economic logic. Thus, in this paper analyzes the problems of telemedicine for telemedicine that are at issue in South Korea, based on this, and presents reasonable health policy directions for telemedicine. To amend the law and legislation the health policy and law, analyze the rationality, feasibility of law and sufficient review should be implemented. Comparing to the foreign which introduced telemedicine earlier, discussion on telemedicine in South Korea remains a long way to go and it is now beginning step. Therefore, it should not forget that the health policy of the government with crass insensitivity can bring great disaster. Above all, to the health care, the sufficient review and social consensus which can reduce the side-effects are priority.

• Journal of information and communication convergence engineering
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• 제15권3호
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• pp.187-192
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• 2017

Autonomous driving vehicle research demands complex road and lane understanding such as lane departure warning, adaptive cruise control, lane keeping and centering, lane change and turn assist, and driving under complex road conditions. A fast and robust road lane detection subsystem is a basic but important building block for this type of research. In this paper, we propose a method that performs road lane detection from black box input. The proposed system applies Random Sample Consensus to find the best model of road lanes passing through divided regions of the input image under HSV color model. HSV color model is chosen since it explicitly separates chromaticity and luminosity and the narrower hue distribution greatly assists in later segmentation of the frames by limiting color saturation. The implemented method was successful in lane detection on real world on-board testing, exhibiting 86.21% accuracy with 4.3% standard deviation in real time.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2018년도 제57차 동계학술대회논문집 26권1호
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• pp.11-12
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• 2018

FPC 알고리즘(Fast Paox-based controller algorithm)은 기존에 Paxos 프로토콜을 단순화하고 Paxos를 개발하고 구현하는 복잡성을 완화할 수 있는 다중 SDN 컨트롤러 간에 적용되는 합의를 처리할 수 있는 알고리즘이다. 하지만, 허가를 결정하는 투표 과정에서 불필요한 절차가 존재하여 연산 속도가 감소하고 계산 비용이 많이 든다는 단점이 있다. 본 논문에서는 이러한 단점을 극복하는 해결책을 제시하여 알고리즘의 성능이 향상되는 것을 증명하였다.

• 정보학연구
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• 제8권4호
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• pp.27-42
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• 2005

In recent days a glowing consensus has been emerging among Korean manufacturing companies that e-Supply Chain Management. The companies also realize that the introduction of e-SCM is not an easy undertaking, and it faces a lot of difficult obstacles. Study was called e-SCM in order a small paper let our country Small and Medium industry understand importance of e-SCM, and to be utilized, Both understanding about e-SCM of College students and investigation executed a parallelism. The companies, Which actually do some e-business and are keen to do so in the future, have a better chance to introduce e-SCM.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2016년도 제54차 하계학술대회논문집 24권2호
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• pp.211-212
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• 2016

본 논문에서는 가상화폐이자 전자 거래의 신뢰성 있는 계약을 보장해 줄 수 있는 이더리움 (Ethereum)의 채굴 과정을 소개하고 향후 활용 방안을 제안한다. 이더리움의 거래 내역은 블록체인 (BlockChain)에 저장이 되며, 반영구적으로 삭제가 불가능하다. 이로써 전자상거래의 최대 단점인 사기 거래가 사전에 방지가 되고, 안전하고 깨끗한 거래가 성사될 수 있도록 하는 것이 목표이다. 이더리움 채굴을 위해서는 비디오카드의 GPU (Graphics Processing Unit)를 이용하였으며, 지갑 생성, 비디오카드 드라이버 설치, pool 서버 가입, 채굴 소프트웨어 설치 및 GPU 오버클럭킹 등의 과정을 수행하였다.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2018년도 제57차 동계학술대회논문집 26권1호
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• pp.9-10
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• 2018

SDN 환경에서 여러 컨트롤러의 동기화는 중요한 문제로 대두되었다. 모든 컨트롤러의 네트워크 상태가 동일한지 여부를 확인하려면 컨트롤러를 효율적으로 동기화하기 위한 합의과정이 필요하다. 하지만 합의 과정에서 일어나는 지도자 선출과정이 임의적이기 때문에 시스템 상에서 시간지연이 일어날 수 있다. 본 논문에서 제안하는 우선순위 기반 Raft 알고리즘은 동기화 프로세스를 제어하는 강력한 지도자를 선택하여 동기화로드에서 시간을 절약할 수 있다.