• 한국산학기술학회논문지
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• 제15권1호
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• pp.137-143
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• 2014

스마트 교육은 정보형 인재에서 창의형 인재로 변화되는 현대사회에서 스마트화, 자동화 교육을 통해 창의적인 스마트 인재를 양성하는 교육 혁명이라 할 수 있다. 즉, 지식정보화와 스마트 기기의 출현 등으로 점차 개인별 능동적 맞춤형 교육 방식으로 교육 패러다임이 변화하고 있으며 이를 반영하는 교육 방식이라 할 수 있다. 따라서, 본 논문에서는 스마트 교육 환경을 구현하기 위한 기반 기술 체계를 설계한 것으로 클라우드 컴퓨팅과 N 스크린 기반의 차세대 스마트 교육 시스템을 연구하였다. 이를 위해 스마트 미디어 환경에서 교육적 기능과 특징 분석을 기반으로 스마트 교육 시스템의 활용 방안을 극대화시킨 시스템 설계를 연구하였다.

• 한국BIM학회 논문집
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• 제11권3호
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• pp.75-90
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• 2021

A smart home system improves the elderly's quality of life by monitoring and analyzing their movements and health conditions with better health-care and social support services. Therefore, there has been an effort to adopt a smart home system for the independently living elderly. However, to the best of our knowledge, no study has investigated the usability of a smart home system on actual independently living elderly housing in long-term settings. Thus, this study aims to demonstrate the usability of a smart home system on independently living elders in living lab conditions. The BLE smart band and the BLE receiver were chosen for the smart home system to monitor the movement of the participants in their homes as well as to monitor the heart rates, step counts, sleep index. Nine independent living elderly from the senior welfare center in Kimjae participated in this living lab demonstration experiment for ten months. This demonstration experiment confirmed the effectiveness of low-cost and easily adoptable IoT-based BLE sensor sets on independent living elders and discussed the troubles and limitations of the experiment. By grasping the pros and cons of IoT-based BLE sensor sets, this study seeks to improve the accessibility and usability of smart home systems for the elderly population in independent living arrangements.

• 한국공간구조학회논문집
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• 제16권3호
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• pp.79-88
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• 2016

An outrigger damper system has been proposed to reduce dynamic responses of tall buildings. In previous studies, an outrigger damper system was optimally designed to decrease a wind-induced or earthquake-induced dynamic response. When an outrigger damper system is optimally designed for wind excitation, its control performance for seismic excitation deteriorates. Therefore, a smart outrigger damper system is proposed in this study to make a control system that can simultaneously reduce both wind and seismic responses. A smart outrigger system is made up of MR (Magnetorheological) dampers. A fuzzy logic control algorithm (FLC) was used to generate command voltages sent for smart outrigger damper system and the FLC was optimized by genetic algorithm. This study shows that the smart outrigger system can provide good control performance for reduction of both wind and earthquake responses compared to the general outrigger system.

• 디지털융복합연구
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• 제13권3호
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• pp.185-191
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• 2015

본 논문에서는 프로파일링 기술을 교육 분야에 융합하여 스마트 교안 제작을 위한 시스템을 구축하기 위해 필요한 제반 요소에 대해 살펴보고, 이에 부합되는 기술인 프로파일링 기술, 기술 동향, 제품 동향에 대하 살펴보았다. 이를 기반으로 구현에 필요한 요소인 스마트 교안 제작 및 편집기술, 스마트 교안 관리기술, 교안 편집 및 연동기술에 대해 제안을 하였다. 제안된 기술을 기반으로 시스템이 구축되면 수업 교안 저작, 콘텐츠 파일 관리, 수업 강의 기능이 복합적으로 구성되며, 수업 진행을 원활히 수행하고 개개인의 학습 능력에 따라 이해도가 향상될 수 있다.

• 한국융합학회논문지
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• 제10권1호
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• pp.25-33
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• 2019

스마트시티 시스템에서 다루는 데이터는 개인의 사생활이나, 공공재적인 요소가 많기 때문에 보안이 중요하며, 따라서 스마트시티 시스템에서 보안에 대한 연구는 필요하다. 본 논문에서는 3 티어(Tier)로 구성된 스마트시티 시스템을 위한 보안 요소들을 정의하고, 각각에 필요한 기술들에 대해서 기술한다. 또한, 스마트시티 시스템에서 가장 중요한 이슈 중 하나인 도시구성요소와 미들웨어와의 보안 관리를 위하여 스마트시티 미들웨어에 보안계층을 설계하고 구현한 내용을 소개한다. 인프라보안계층은 블록 암호 (Block Cipher) 알고리즘과 메시지 다이제스트 알고리즘을 기반으로 구성되었으며, 이를 통해 데이터의 기밀성과 무결성을 보장하고, 정책서버를 통한 장치 접근 관리를 하여 인가된 장치만 스마트시티 구성요소를 관리할 수 있도록 한다.

• Structural Engineering and Mechanics
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• 제37권4호
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• pp.443-458
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• 2011

An extensive numerical investigation on the magnetorheological (MR) damper-based smart passive control system for mitigating vibration of stay cables under wind loads has been conducted. The smart passive system is incorporated with an electromagnetic induction (EMI) device for reducing complexity of the conventional MR damper based semi-active control system by eliminating an external power supply part and a feedback control part (i.e., sensors and controller). In this study, the control performance of the smart passive system has been evaluated by using a cable structure model extracted from a full-scale long stay cable with high tension. Numerical simulation results of the proposed smart damping system are compared with those of the passive and semi-active control systems employing MR dampers. It is demonstrated from the results that the control performance of the smart passive control system is better than those of the passive control cases and comparable to those of the semi-active control systems in the forced vibration analysis as well as the free vibration analysis, even though there is no external power source in the smart passive system.

• Journal of Information Processing Systems
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• 제15권1호
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• pp.181-188
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• 2019

A production system is a management system that supports all activities to perform production operations at the manufacturing site. From the point-of-view of a smart factory, smart manufacturing systems redesigned the concept of onsite production systems to fit the entire system and its necessary functional composition. In this study, we select the key functions needed to build a smart factory for a PCB line and propose a new six-step model for the deployment of a smart manufacturing system by integrating essential functions. The smart manufacturing system newly classified the production and operation tasks of PCB manufacturing and selected necessary functions through requirement analysis and benchmarking of advanced companies. The selected production operation tasks are mapped to the functions of the system and configured into seven modules, and the optimal deployment model is presented to allow flexible responses to the characteristics of the tasks. These methodologies are first presented in this study, and the proposed model was applied to the PCB line to confirm that they had significant changes in the work method, qualitative effects, and quantitative effects. Typically, lead time and WIP have reduced by about 50%.

• 전기학회논문지
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• 제62권9호
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• pp.1209-1216
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• 2013

Recently, there is a rising interest in smart grid operating system which manages various types of distributed generation, smart meters, and electric vehicles with power grid. Considering the features of smart grid environment, the interoperability should be one of the important factors to build smart grid environment successfully. To secure interoperability, smart grid operating system should conform to some standards in terms of the data representation and communication. CIM and OPC-UA are the international standards widely used in smart grid domain for enabling interoperability. They provide common information model and the unified architecture for communicating between each systems or applications. In this paper, we illustrate a smart grid operating system that we have developed to secure interoperability between not only applications but also numerous legacy systems(applications) by implementing CIM based information model and OPC-UA based communication interface services.

• 전기학회논문지
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• 제62권3호
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• pp.293-299
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• 2013

Power system technologies in the area of smart grid are being converged with communication system technologies or information technologies(IT). This interdisciplinary action affects on two parts vigorously so that IT has become a essential part of power industry. But terminologies of two parts are confused and it is necessary that these are standardized to develop the industry. The interpretation works with scientific and technological standard of the smart grid terminologies which are IEC TC 57 glossary and non-glossary terminologies are introduced. Based on the interpretation works of the smart grid terminologies, an online terminology information system for the standardization of smart grid terminologies is proposed. The system provides the capability of collection and delivery of academic society opinions for the selected and interpreted terminologies.

• Journal of Information Processing Systems
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• 제13권6호
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• pp.1602-1612
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• 2017

Since rapidly disseminating of Internet of Things (IoT) as the new communication paradigm, a number of studies for various applications is being carried out. Especially, interest in the smart medical system is rising. In the smart medical system, a number of medical devices are distributed in popular area such as station and medical center, and this high density of medical device distribution can cause serious performance degradation of communication, referred to as the coexistence problem. When coexistence problem occurs in smart medical system, reliable transmitting of patient's biological information may not be guaranteed and patient's life can be jeopardized. Therefore, coexistence problem in smart medical system should be resolved. In this paper, we propose a distributed coexistence mitigation scheme for IoT-based smart medical system which can dynamically avoid interference in coexistence situation and can guarantee reliable communication. To evaluate the performance of the proposed scheme, we perform extensive simulations by comparing with IEEE 802.15.4 MAC protocol which is a traditional low-power communication technology.