• Proceeding of KASS Symposium
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• 2008.05a
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• pp.212-217
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• 2008

This paper is concerned with the structural design of Angola Stadium. The Angola stadium is composed of a Steel moment frame system and a Cantilever steel truss roof. Whole structural analysis is necessary to ensure the stability. Considered FEM analysis, Design of Wind load & Seismic, Stand diaphragm, interaction between stand and Roof, Serviceability.

• Proceedings of the Korea Database Society Conference
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• 1998.09a
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• pp.51-80
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• 1998

6. 결론［1］ 6.1. 국내 현황 ㆍ DL 관련 기술에 대한 기초연구 및 응용개발이 독자적이고 소규모로 추진 중 ㆍ 많은 기관이 이미지 기반으로 원문 구축 ㆍ 표준화 없이 정보 구축 ㆍ기관 및 시스템간 상호 운용성 보장 없음 $.$정보 인프라 미비 6. 결론［2］ 6.2. 앞으로 DL 연구/개발 방향 $.$DL:지식정보화 사회의 기반구조 $.$국가 주도하의 DL 연구/개발 - 장기간의 기초 연구와 응용 연구 -국가적 표준차 요구 -정보 하부 구조 구축 $.$정보통신 기업의 DL 연구 및 개발 참여 유도 -관련기업, 출판사, 도서관, 저작권 협회의 적극적 참여-정보 구축/서비스 관련 기술 개발 -정보 경제학 도입(중략)

• Journal of the Korea institute for structural maintenance and inspection
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• v.17 no.2
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• pp.21-32
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• 2013

This is a preliminary study for the real-time feedback vibration control of building structures. The study developed a wireless acceleration sensor system based on authentic technology capacities, to integrate with the Prototype AMD system and ultimately construct the feedback vibration control system. These systems were used to evaluate the basic performance levels of the control systems within model building structures. For this purpose, the study first developed a wireless acceleration sensor unit that integrates an MEMS sensor device and bluetooth communication module. Also, the study developed an operating program that enables control output based on real-time acceleration response measurement and control law. Furthermore, the Prototype AMD and motor driver system were constructed to be maneuvered by the AC servo-motor. Eventually, all these compositions were used to evaluate the real-time feedback vibration control system of a 2-story model building, and qualitatively measure the extent of vibrational reduction of the target structure within the laboratory validation tests. As a result of the tests, there was a definite vibrational reduction effect within the laboratory validation tests. As a result of the tests, there was a definite vibrational reduction effect within 1st and 2nd resonance frequency as well as the random frequency of the model building structure. Ultimately, this study confirmed the potential of its wireless acceleration sensor system and AMD system as an effective tool that can be applied to the active vibration control of other structures.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2003.05a
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• pp.246-254
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• 2003

행위범주를 이용한 구조에서 가장 중요한 특징 두가지는 첫째 행위의 계층을 주종이며 정적인 계층으로 구분하지 않고 행위 범주별 구분을 하여 복잡한 환경에 유연하게 대처할 수 있다. 둘째, 모든 행위를 객체화 하여 처리한다. 객체화 된 행위는 스스로의 문제점을 감시하고 처리하거나 보고하여 전체 구조의 간편화를 가져오게 된다. 본 논문에서는 행위를 범주 구분을 위하여 필요한 행위 설계 방식을 제시하고 행위 객체를 위한 구성요소를 소개한다.

• The Transactions of the Korea Information Processing Society
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• v.4 no.12
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• pp.3123-3132
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• 1997

In this paper, we describe access control system for protection of pay TV program in digital DBS(Direct Broadcast satellite) system. We also propose a possible access control system and operation scenario for scrambling and descrambling which are important in access control system. Transport stream structure and option, entitlement checking message and entitlement management message for access control on digital broadcasting system are described in this paper. Especially, the authentication based on Flat-Shamir and Gulllou-Quisquater schemes required for verification of proper subscriber as access control is oriented to smart card number and subscriber ID(Identity). It has less restriction than scheme oriented to descrambler number.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2009.04a
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• pp.84-87
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• 2009

본 논문에서는 최근 초고층 건축물에 많이 활용되어지는 기둥-가새 시스템인 다이아그리드 시스템을 활용하여 중저층 건축물에 적용가능성을 평가하였다. 본 시스템은 튜브구조의 형태로 횡력에 대한 저항력이 우수하며 중력하중과 황하중을 기초와 지반에 안전하게 하중을 전달한다. 다이아그리드는 경사기둥과 보를 반복적으로 삼각형 형태로 배치되어 중력하중을 받을 경우 수직부재는 압축력을 보는 인장력을 받게 된다. 경사기둥과 보를 연결하는 접합부는 H-형강으로 설계 시 제작이 복잡하고 외관이 좋지 않다. 하지만 원형강관을 사용 할 경우 복합하지 않은 형태로 설계가 가능하고 외관이 우수하기 때문에 외부에 노출이 가능해진다. 또한 원형강관은 개방형 단면 부재에 비해 압축좌굴과 비틀림에 대한 성능 등이 우수하여 구조적인 성능이 우수하다. 원형강관을 이용하여 다이아그리드 시스템이 고층 건축물 뿐만 아니라 중저층 건축물에도 적용 타당성을 검토하였으며 원형강관 접합부 설계는 한계상태설계법이 사용 된 KBC2008(안)을 이용하여 설계하였다.

• Journal of Korean Association for Spatial Structures
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• v.12 no.2
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• pp.99-108
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• 2012

Microvibration problem of high-technology facilities, such as semi-conductor plants and TFT-LCD plants, has been considered as important factors that affects the performance of products and thus it is regarded as important in facilities with high precision equipments. In this paper, various base isolation control systems are used to investigate their microvibration control performance. To this end, train-induced ground acceleration is used for time history analysis and three-story example building structure is employed. Microvibration control performance of passive and smart base isolation systems have been investigated in this study. Based on numerical simulation results, it has been verified that smart base isolation system can control microvibration of a high-technology facility subjected to train-induced excitation.

• Journal of the Korea institute for structural maintenance and inspection
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• v.17 no.2
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• pp.83-93
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• 2013

Generally the capacities of electric power transmission tower's members are improved by increasing their stiffness nature through injection of grout or attachment of other structural stiffeners. Those are for upgrading their axial strength by fulfillment of proper materials into pipe members, increment of member dimension by addition of section, or a combination of the two. However the use of innovative and unusual procedures would be positively recommended for getting more stable state. It is that buckled members are replaced with lengthened and strengthened members. In providing the structural restoration procedures for the existing electric power transform tower whose main members have been damaged due to unequal foundation settlement, structural damage inspection works and numerical analyses for the damaged one and the restored one were done in detail at first. secondarily member-exchanging works using a newly-generated jacking system and strengthened members were achieved. This figures are to point clearly to inherent advantages attending the management of the towers.

• Journal of the Korean Institute of Intelligent Systems
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• v.10 no.2
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• pp.113-121
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• 2000

This paper presents a parallel-structure fuzzy system(PSFS) for prediction of time series data. The PSFS consists of a multiple number of fuzzy systems connected in parallel. Each component fuzzy system in the PSFS predicts the same future data independently based on its past time series data with different embedding dimension and time delay. The component fuzzy systems are characterized by multiple-input singleoutput( MIS0) Sugeno-type fuzzy rules modeled by clustering input-output product space data. The optimal embedding dimension for each component fuzzy system is chosen to have superior prediction performance for a given value of time delay. The PSFS determines the final prediction result by averaging the outputs of all the component fuzzy systems excluding the predicted data with the minimum and the maximum values in order to reduce error accumulation effect.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2004.10a
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• pp.29-47
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• 2004

최근 로봇에 지능을 부여하기 fl한 다양한 연구가 진행되어 지고 있으며, 생물학-곤충들의 행동과 지능에 기초를 둔 로봇 지능-행동 연구가 중요한 연구 줄거리를 형성하게 되었다. 이 글은 로봇의 제어구조-숙고형, 반사행동형-에 대한 소개와 각각의 장.단점에 대한 고찰, 생물학-곤충들의 행동과 지능-에 기초를 둔 로봇'지능-행동 연구 분야의 최근의 연구 성과들을 고찰하고 소개한다. 그리고 지능을 부여하기 위한 학습 방법으로서의 강화학습(reinforcement learning)의 연구주제를 소개하고 향후의 로봇 연구 방향에 대하여 고찰한다.