• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2009년도 춘계학술대회 논문집 전기설비전문위원
• /
• pp.216-218
• /
• 2009

In this paper, a real time monitoring and management system being operated in the ubiquitous environment was developed to monitor leakage current, load current, and arc-fault, and an electrical safety network for reasonable management of electrical risk factor was proposed. For confirmation of usefulness and reliability of the proposed safety network and system, the developed intelligent panels were applied to 28 Korean traditional houses in Jeonjoo city, and the network including the panels was operated. If the National Electrical Safety Network is completely constructed in the houses of general electrical users, the network will have an effect on that a main manager transfers from general people to expert. As a result, the electrical fires caused by an over-load, an arc-fault, and an earth-fault will be prevented.

• 제어로봇시스템학회논문지
• /
• 제6권10호
• /
• pp.911-917
• /
• 2000

As many sensors and actuators are used in various automated systems, the application of network to real-time distributed control system is gaining acceptance in many industries. In order to take advantages of networking, however, the network should be carefully designed to satisfy real-time distributed control. This paper presents an implementation method of closed-loop control using Profibus-FMS. In order to implement a closed-loop control system, we used industrial computers with Profibus-FMS network cards and a DC servo motor. Through various experiments, the step response of the control system with network was compared with the reference response without network.

• International Journal of Fuzzy Logic and Intelligent Systems
• /
• 제3권1호
• /
• pp.7-12
• /
• 2003

In recent years, many attempts have been made to predict the behavior of bonds, currencies, stock or other economic markets. Most previous experiments used the neural network models for the stock market forecasting. The KOSPI 200 (Korea Composite Stock Price Index 200) is modeled by using different neural networks and fuzzy logic. In this paper, the neural network, the dynamic polynomial neural network (DPNN) and the fuzzy logic employed for the prediction of the KOSPI 200. The prediction results are compared by the root mean squared error (RMSE) and scatter plot, respectively. The results show that the performance of the fuzzy system is little bit worse than that of the DPNN but better than that of the neural network. We can develop the desired fuzzy system by optimization methods.

• 대한임베디드공학회논문지
• /
• 제19권3호
• /
• pp.141-149
• /
• 2024

This paper proposes a configuration automation technique to minimize service interruption time in the event of a corporate network access layer switch failure. The automation is achieved without the need for a separate external system, as the network setting information is stored in a container inside the switch, enabling rapid recovery without requiring separate storage. This approach ensures the continuity of network services and demonstrates the efficiency of configuration automation. The proposed technique improves corporate network stability by providing a quick response in the event of a failure.

• 한국철도학회논문집
• /
• 제9권3호
• /
• pp.319-324
• /
• 2006

Studied was a strategy of technology development for railway system in terms of railway network. First, The successful launch of the Korean HST system has not only decreased logistics burden but also significantly transformed the Korean trunk-line railway network, revolutionizing the logistics and technology sectors and reinvigorating the Korean railway industry in one century. Korean railway industry sector is now investing to develop many different types of railway system(G7, Post G7, tilting train...) so that these kinds of various railway system development should be integrated with the National Inter-modal Transportation Network Plan. To secure sufficient capacity that is required by the National Railroad Plan, the railway industry needs to establish mid- and long-term train purchase and operation strategies in compliance with railway construction and operation policies. During a railway construction planning, train operators, based on their train operation strategies, should come up with measures to closely cooperate with project operators from the planning stage through to the opening of a railway system. To be more precise, train operators should establish long-term train procurement plans reflecting both long-term national railroad network plans and plans for each railway line in order to suggest appropriate roles and schedules for each line. Also, based on the long-term railway plan, directions should be decided concerning the research and development of trains in advance.

• Journal of Information Processing Systems
• /
• 제15권4호
• /
• pp.765-784
• /
• 2019

The smart city is one of the most promising, prominent, and challenging applications of the Internet of Things (IoT). Smart cities rely on everything connected to each other. This in turn depends heavily on technology. Technology literacy is essential to transform a city into a smart, connected, sustainable, and resilient city where information is not only available but can also be found. The smart city vision combines emerging technologies such as edge computing, blockchain, artificial intelligence, etc. to create a sustainable ecosystem by dramatically reducing latency, bandwidth usage, and power consumption of smart devices running various applications. In this research, we present a comprehensive survey of emerging technologies for a sustainable smart city network. We discuss the requirements and challenges for a sustainable network and the role of heterogeneous integrated technologies in providing smart city solutions. We also discuss different network architectures from a security perspective to create an ecosystem. Finally, we discuss the open issues and challenges of the smart city network and provide suitable recommendations to resolve them.

• 산업공학
• /
• 제20권3호
• /
• pp.395-406
• /
• 2007

In the telecommunication industry, estimation of the cost of network facilities is very important since depreciation cost of the facilities accounts for a large portion of the product cost. Moreover, cost estimation in the industry becomes more difficult because of increasing indirect cost upon digital convergence, expanding multi-purpose facilities, complexity of service product, etc. Nevertheless, not much seem to have been done in improving estimation methodology of the cost of network facilities. As a result, the quality of cost information on network facilities has deteriorated, and now even decision-makers in the industry dismiss the information. Recently, two major telecommunication companies adopted a new network cost estimation method to deal with the issue. In this paper, we study the concept of new cost estimation method and the procedure to develop and apply it. We also suggest the method to carry out the cost allocation using Matlab which is more efficient and time-saving than other commercial cost calculation packages.

• KNOM Review
• /
• 제22권3호
• /
• pp.1-12
• /
• 2019

최근 빅데이터와 AI를 이용한 연구들이 ICT 분야에서 주요 이슈로 부상하고 있다. 하지만 연구를 위한 빅데이터의 크기가 기하급수적으로 증가하면서 기존 네트워크 방식의 데이터 전송에 대해 사용자들은 빅데이터를 송수신하는데 걸리는 시간은 하드디스크를 복사하여 보내는 시간보다 느리다는 문제를 제기한다. 이에 따라 연구자들은데이터를 고속으로 전송하고, 다양한 네트워크의 구조를 수용할 수 있는 동적이고 유연한 네트워크 기술을 요구한다. SDN/NFV 기술은 네트워크를 프로그래밍하여 사용자들의 요구에 적절한 네트워크를 제공할 수 있는 기술로써, 네트워크의 유연성 및 보안성 문제를 해결할 수 있다. 또한 AI를 수행하는데 있어 문제가 되는 중앙집중적 방식의데이터 처리는 실시간성을 보장할 수 없고, 트래픽이 증가하는 경우 네트워크 지연이 발생한다. 이를 해결하기 위해 중앙집중적 방식을 탈피한 Edge-Computing 기술을 이용하여 해결할 수 있다. 본 논문에서는 SDN, NFV, Edge-Computing 기술에 대한 개념 및 연구 동향에 대해 알아보고, 세 가지 기술을 접목시켜 사용되는 데이터 중심 네트워크 기술 동향에 대해 분석한다.

• Archives of Pharmacal Research
• /
• 제28권1호
• /
• pp.1-15
• /
• 2005

Cancer is still a major global health concern even after an everlasting strive in conquering this dread disease. Emphasis is now given to chemoprevention to reduce the risk of cancer and also to improve the quality of life among cancer afflicted individuals. Recent progress in molecular biology of cancer has identified key components of the cellular signaling network, whose functional abnormality results in undesired alterations in cellular homeostasis, creating a cellular microenvironment that favors premalignant and malignant transformation. Multiple lines of evidence suggest an elevated expression of cyclooxygenase-2 (COX-2) is causally linked to cancer. In response to oxidative/pro-inflammatory stimuli, turning on unusual signaling arrays mediated through diverse classes of kinases and transcription factors results in aberrant expression of COX-2. Population-based as well as laboratory studies have explored a broad spectrum of chemopreventive agents including selective COX-2 inhibitors and a wide variety of anti-inflammatory phytochemicals, which have been shown to target cellular signaling molecules as underlying mechanisms of chemoprevention. Thus, unraveling signaling pathways regulating aberrant COX-2 expression and targeted blocking of one or more components of those signal cascades may be exploited in searching chemopreventive agents in the future.

• 한국콘텐츠학회논문지
• /
• 제6권3호
• /
• pp.28-37
• /
• 2006

인터넷 기술은 지난 30여 년간 비약적으로 발전하여 모든 산업분야를 변혁시키고 개인과 기업의 필수도 구로서 국가의 중요한 기반시설로 자리 잡았다. 1990년대 중반부터 선진국들은 인터넷을 과학 및 교육 분야의 발전에 가장 중요한 기반시설의 하나로 인식하고 국가 연구 교육망을 구축하고 이를 새로운 망 기술과 과학 기술 개발을 위한 도구로 제공하고 있다. 이 논문에서 우리는 선진국의 연구 교육망 발전 현황을 종합적으로 살펴보고, 국내 첨단망 활동을 선진국과 비교하여 문제점 분석하고, 이를 토대로 한국 첨단망의 발전 방안을 제시하였다.