• 한국공간정보시스템학회 논문지
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• 제8권1호
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• pp.107-118
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• 2006

본 논문에서는 GIS와 네트웍 알고리듬을 이용하여 통신관망의 설계를 최적화하였다. 구체적이고 계량적인 분석을 위해 신규로 조성되는 대규모의 도시개발지역을 대상으로 하여 기존의 설계방식에 의해 산출된 통신관망과 최적경로 알고리듬을 이용한 통신관망과의 건설비용을 비교하였다. 본 연구의 결과 GIS와 최적경로 알고리듬을 적용한 설계 결과가 기존의 설계방법에 비해 상당한 비용절감 효과가 있음을 보여준다. 연구 대상지역에서 기존설계에 의해 산출된 통신관로의 거리는 5,267m이며 최적경로를 적용한 결과는 4,807m로 460m(9.5%)의 차이를 보였다. 결과를 비용으로 산정했을 경우 약 19,469천원(8.7%)의 비용절감 효과를 보였다. 본 연구에서 제시된 최적화 기법은 기존 설계기법에 비해 통신관망의 공사비의 절감 이외에 설계과정의 표준화 및 자동화가 가능하므로 이를 이용한 자동설계 시스템 개발로 설계비용과 인력이동에 따른 설계업무 적응기간 단축과 인건비 절감이 가능하며, 또한 설계 결과에 대한 객관적 검증이 가능할 것으로 판단된다.

• Journal of Electrical Engineering and Technology
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• 제10권3호
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• pp.1221-1226
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• 2015

This paper proposes a multiple switch mode power supply (SMPS) system based on the wireless network which controls variable load. The system enables power supply of up to 600W using 200W SMPS as a unit module and provides a controlling function of output power based on variable load and a monitoring function based on wireless network. The controlling function for output power measures the variation of output power and facilitates efficient power supply by controlling output power based on the measured variation value. The monitoring function guarantees a stable power supply by observing the multiple SMPS system in real time via wireless network. The performance of the proposed system was examined by various experiments. In addition, it was verified through standardized test of Korea Testing Certification. The results were given and discussed.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1987년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 16-17 Oct. 1987
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• pp.376-381
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• 1987

There are many kinds of intelligent devices on the factory floor nowadays. Standardized communication methods became a necessity for efficient flow of production information among various systems. MAP (Manufacturing Automation Protocol) based on ISO (International Standard Organization) OSI (Open Systems Interconnection) is gaining acceptance of major industries worldwide.

• KNOM Review
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• 제22권1호
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• pp.20-29
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• 2019

최근 유해 네트워크 트래픽을 탐지하기 위해 머신러닝 기법을 활용하는 다양한 방법론들이 주목을 받고 있다. 이 논문에서는 컨볼루션 신경망 (Convolutioanl Neural Network)을 기반으로 유해 네트워크 트래픽을 분류하는 기법을 소개하고 그 성능을 평가한다. 이미지 처리에 강한 컨볼루션 신경망의 활용을 위해, 네트워크 트래픽의 주요 정보를 규격화된 이미지로 변환하는 방법을 제안하고, 변환된 이미지를 입력으로 컨볼루션 신경망을 학습시켜 유해 네트워크 트래픽의 분류를 수행하도록 한다. 실제 네트워크 트래픽 관련 데이터셋을 활용하여 이미지 변환 및 컨볼루션 신경망 기반 네트워크 트래픽 분류 기법의 성능을 검증하였다. 특히, 다양한 컨볼루션 신경망 기반 네트워크 모델 구성에 따른 트래픽 분류 기법의 성능을 평가하였다.

• 대한임베디드공학회논문지
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• 제12권6호
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• pp.405-411
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• 2017

As the number of sensors in a ship has increased, studies have been actively conducted to efficiently manage a large amount of data. Sensors in a ship follow the NMEA (National Marine Electronics Association) data format. In particular, NMEA0183 standardized as IEC 61162-1 and NMEA2000 standardized as IEC 61162-3 are widely used. NMEA0183 is a protocol based on serial communication and NMEA2000 is a protocol based on CAN (Controller Area Network) communication. We implemented a gateway that receives data from NMEA0183 sensors and NMEA2000 sensors and then transmits them to the server on TCP/IP network. By using the NMEA2000 0183/2000 gateway to receive the sensor data and manage it through the ship's preventive maintenance system, the sensor data can be utilized efficiently and promptly. This management can reduce crew's daily tasks and reduce the number of accidents.

• 한국대기환경학회지
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• 제30권6호
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• pp.600-618
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• 2014

The metadata for urban meteorological observation is standardized through comparison with those established at the World Meteorological Organization and the Korea Meteorological Administration to understand the surrounding environment around the sites exactly and maintain the networks and sites efficiently. It categorizes into metadata for an observational network and observational sites. The latter is again divided into the metadata for station general information, local scale information, micro scale information, and visual information in order to explain urban environment in detail. The metadata also contains the static information such as urban structure, surface cover, metabolism, communication, building density, roof type, moisture/heat sources, and traffic as well as the update information on the environment change, maintenance, replacement, and/or calibration of sensors. The standardized metadata for urban meteorological observation is applied to the Weather Information Service Engine (WISE) integrated meteorological sensor network and sites installed at Incheon area. It will be very useful for site manager as well as researchers in fields of urban meteorology, radiation, surface energy balance, anthropogenic heat, turbulence, heat storage, and boundary layer processes.

• International Journal of Advanced Culture Technology
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• 제9권3호
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• pp.327-333
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• 2021

Inbody is a tool for measuring health information with high reliability and accuracy to analyze body composition. Unlike the existing method of storing/processing and outputting data on the server side, the health information generated by InBody requires accurate support for health sharing and data analysis services using mobile devices. However, in the process of transmitting body composition measurement information to a mobile service, a problem may occur in data transmission/reception processing. The reason for this is that, since the network network in the cloud environment is used, if the connection is cut off or the connection is changed, it is necessary to provide a global service, not a temporary area, focusing on the mobility of InBody information. In addition, since InBody information is transmitted to mobile devices, a standard schema should be defined in the mobile cloud environment to enable information transfer between standardized InBody data and mobile devices. We propose a mobile cloud system using EMRA(Extended Metadata Registry Access) in which a mobile device processes and transmits body data generated in the inbody and manages the data of each local organization with a standard schema. The proposed system processes the data generated in InBody and converts it into a standard schema using EMRA so that standardized data can be transmitted. In addition, even when the mobile device moves through the area, the coordinator subsystem is in charge of providing access services. In addition, EMRA is applied to the collision problem due to schema heterogeneity occurring in the process of accessing data generated in InBody.

• 디지털콘텐츠학회 논문지
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• 제2권1호
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• pp.31-40
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• 2001

현재 네트워크 관리를 위해서 SNMP(Simple Network Management Protocol), CMIP(Common Management Information Protocol), RMON(Remote network MONitoring) 등의 많은 표준안이 있다. 이것들 중 특히 RMON은 대규모 네트워크의 서브네트워크를 관리하기 위해서 개발되었지만, RMON 기능을 이용하기 위해서는 RMON 기능을 가진 허브나 라우터의 추가적인 장비도입이 필요고, 더욱이 이러한 장비의 가격이 고가이므로 네트워크 관리자에게는 관리비용의 부담이 크다는 단점이 있다. 본 논문에서는 PC 상에서 가상 장비 드라이버(VxD)를 이용하여 LAN 세그먼트의 교통량을 감시하는 PC 기반 RMON 에이전트 시스템을 제안한다. 이 시스템은 LAN 세그먼트 관리를 위한 새로운 장비의 도입이나 관리비용의 부담을 감소시킬 수 있다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권11호
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• pp.4163-4183
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• 2021

As measures for protecting users and ensuring security of electronic financial transactions, such as online banking, financial institutions in South Korea have implemented network segregation policies. However, a revision of such domain-centered standardized network segregation policies has been increasingly requested because of: 1) increased demand for remote work due to changes resulting from COVID-19 pandemic; and 2) the difficulty of applying new technologies of fintech companies based on information and communications technologies (ICTs) such as cloud services. Therefore, in this study, problems of the remote work environment arising from the network segregation policy currently applied to the financial sector in South Korea and those from the application of new ICTs such as fintech technology have been investigated. In addition, internal network protection policies of foreign financial sectors, such as those of the United States, United Kingdom, European Union, and Russia, and internal network protection policies of non-financial sectors, such as control systems, have been analyzed. As measures for the effective improvement of the current network segregation policy, we propose a policy change from domain-based to data-centric network segregation. Furthermore, to resolve threats of hacking at remote work, recently emerging as a global problem due to COVID-19 pandemic, a standard model for remote work system development applicable to financial companies and a reinforced terminal security model are presented, and an alternative control method applicable when network segregation is not applied is proposed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 하계학술대회 논문집 C
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• pp.1304-1306
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• 1995

In this study, a neural network algorithm through a data standardization method was developed to discriminate the phase-shifted partial discharge(PD) patterns such as a $\phi$-q-n pattern. Considering the PD measurement in the field, it is not so easy to acquire absolute phase angles of PD pulses. As a consequence, one of the significant problems to be solved in applying the neural network algorithm to practical systems is to develop a method that can discriminate phase-shifted $\phi$-q-n patterns. Therefore, authors established a new method which could convert phase-shifted $\phi$-q-n patterns to a standardized $\phi$-q-n pattern which was not influenced by phase shifting. This new standardization method improved the recognition performance of a neural network for the phase-shifted $\phi$-q-n patterns considerably.