MItral Regurgitation and Peripheral Arterial Embolization 2예 보고

김홍진,서보양,권굉보 대한혈관외과학회 1985 Vascular Specialist International Vol.1 No.1

풍진동 저감을 위한 TMD의 적용 예

김홍진 한국소음진동공학회 2009 소음 진동 Vol.19 No.6

Economic Cooperation since 1990 between Korea and Mongolia: An Evaluation and Prospects

김홍진 한국몽골학회 2010 몽골학 Vol.0 No.29

This paper reviews and evaluates the outcome of economic cooperation between Korea and Mongolia for the last 20 years, and suggests the agenda for the expansion of economic cooperation in the future. Korea and Mongolia have pursued a close cooperation after the establishment of an official diplomatic relationship in 1990. The enlargement of trade and investment in the economy area would be especially worthy of close attention. The trade volume between two countries has expanded about 100 times from 1990 to 2008. Korea came second in Mongolia's exports, and third in Mongolia's imports in 2008. Korea now appears to be one of the most important trade partners for Mongolia. Nevertheless, Mongolia reveals a significant deficit to Korea in commodity balance. With respect to FDI in Mongolia, Korea holds the third rank, preceded by China and Canada. For the expansion of economic cooperation between two countries, the next agenda could be suggested in four parts. First, a preliminary feasibility study for a free trade agreement. Second, more and stronger cooperation in the area of direct investment and technology support to Mongolia. Third, concrete cooperation for tourism development of Mongolia. And forth, sharing Korea's experience of rapid economic growth over the past five decades with Mongolia. This paper reviews and evaluates the outcome of economic cooperation between Korea and Mongolia for the last 20 years, and suggests the agenda for the expansion of economic cooperation in the future. Korea and Mongolia have pursued a close cooperation after the establishment of an official diplomatic relationship in 1990. The enlargement of trade and investment in the economy area would be especially worthy of close attention. The trade volume between two countries has expanded about 100 times from 1990 to 2008. Korea came second in Mongolia's exports, and third in Mongolia's imports in 2008. Korea now appears to be one of the most important trade partners for Mongolia. Nevertheless, Mongolia reveals a significant deficit to Korea in commodity balance. With respect to FDI in Mongolia, Korea holds the third rank, preceded by China and Canada. For the expansion of economic cooperation between two countries, the next agenda could be suggested in four parts. First, a preliminary feasibility study for a free trade agreement. Second, more and stronger cooperation in the area of direct investment and technology support to Mongolia. Third, concrete cooperation for tourism development of Mongolia. And forth, sharing Korea's experience of rapid economic growth over the past five decades with Mongolia.

장거리 영상기반 변위계측 시스템 검증

김홍진,허석재,신승훈 대한건축학회지회연합회 2018 대한건축학회연합논문집 Vol.20 No.6

The purpose of this study is to verify the long - range measurement performance for practical field application of VDMS. The reliability of the VDMS was verified by comparison with the existing monitoring sensor, GPS, Accelerometer and LDS. It showed the ability to accurately measure the dynamic displacement by tracking a motion of free vibration of target. And using the PSD function of measured data, the results in the frequency domain were also analyzed. We judged that VDMS is able to identify the higher system mode and has sufficient reliability. Based on the reliability verification, we conducted tests for long-distance applicability for actual application of VDMS. The distance from the stationary target model structure was increased by 50m interval, and the maximum distance was set to 400m. From the distance of 150m, the image obtained by the commercial camcorder has an error in the analysis, so the measured displacement comparison was performed between the LDS and the refractor telescope measurement results. In the measurement results of the displacement area of V DMS, the data validity was deteriorated due to the data shift by the external force and the quality degradation of the enlarged image. However, even under the condition that the effectiveness of the displacementmeasurement data of VDMS is low, the first mode characteristic included in the free vibration of the object is clearly measured. If the influence from the external environment is controlled and stable data is collected, It is judged that reliability of long-distance VDMS can be secured. 본 연구에서는 파이프에 하중 재하 시 좌굴에 의해 발생하는 변위를 계측하기 위해 영상기반 변위계측 시스템의 적용성을 평가하였다. 하중 재하 방식으로는 UTM에서 액추에이터의 변위를 일정시간 간격으로 조절하여 하중을 가하는 방식을 사용하였으며, 높이에 따른 정확도 비교 분석을 위해, 일반 구조용 탄소 강관과 강재 파이프 서포트의 높이를 2m부터 4m까지 0.5m 간격으로 설정하였다. 영상기반 변위계측을 위해 DDVS (Dynamic Displacement Vision System) 기법을 활용하였으며, 변위 발생 시 타겟이 ROI (Region Of Interest)를 벗어나는 문제를 해결하기 위해 ROI를 추적하도록 설정하였다. 영상기반 변위계측 결과는 기존의 접촉식 센서인 LVDT (The Linear Variable Differential Transformer)의 변위계측 결과를 비교하여 그 오차를 분석하였다. 또한 영상기반 계측변위는 데이터로거로부터 수집된 하중으로부터 하중-변위 관계 데이터를 형성하여 LVDT로부터 수집된 하중-변위 데이터와 비교하여 오차를 분석하였다. DDVS 오차를 분석하는 방법으로 상관계수의 제곱 값 (R^2)을 적용하였으며, 모든 높이에서 상관계수의 제곱 값 (R^2)이 1에 가까워 오차가 매우 적게 발생하였다.

컴퓨터 2000년 문제

김홍진 한국컴퓨터정보학회 1998 한국컴퓨터정보학회지 Vol.5 No.1

정보화 사회 적응력 함양을 위한 교육

김홍진 한국컴퓨터정보학회 1997 한국컴퓨터정보학회지 Vol.4 No.3

초고층 주거용 건물의 풍진동 저감을 위한 LCVA 설계 및 시공

김홍진,김현배,조지성,유은종,조봉호,이상현 대한건축학회 2010 大韓建築學會論文集 Vol.26 No.1

<P>Increasing height of tall buildings often requires supplementary damping system for occupants comfort in windy condition. This paper presents design and construction of liquid column vibration absorbers (LCVA) installed in a 64-story building, which is the highest residential building with flat plate structural system in Korea, for mitigation of wind-induced motion. LCVA is a special type of secondary mass-type dampers relying on the motion of a column of liquid in a U-shaped container to counteract the forces acting on the structure. Since it has different dimensions of vertical and horizontal portions of container, it has benefits of easy tuning and wide natural frequency range. First, an experiment using 1/20 scaled model is presented for control performance evaluation of LCVA. In the experiment, the test structure is excited using sinusoidal force with varying frequencies and the control performance is evaluated comparing the dynamic response of the structure with LCVA with one without LCVA. Next, design and installation of LCVA is presented along with field measurement and tuning process. The analysis results of full scale filed measurement show that LCVA increases the damping ability of building effectively.</P>

부가질량형 감쇠기의 현장실험을 통한 동특성추정

김홍진,조지성,주석준,황재승 한국풍공학회 2010 한국풍공학회지 Vol.14 No.1

<P>TLD(Tuned Liquid Damper)나 TLCD(Tuned Liquid Column Damper)와 같이 액체를 질량체로 사용하는 부가질량형 감쇠기의 경우 동특성추정을 위하여 실제 크기의 진동제어기를 공장에서 제작하여 실험하는 것이 불가능하다. 또한 TMD(Tuned Mass Damper)의 질량체를 콘크리트로 사용하는 콘크리트 TMD의 경우에도 공장실험에서 콘크리트를 타설할 수 없기 때문에 완성된 TMD의 정확한 동적특성을 파악하는 것이 어렵다. 따라서 본 논문에서는 공장 가조립을 통한 실험을 실시하여 동적특성을 추정하기 어려운 경우에 대하여 현장실험을 통한 동특성추정 기법에 관하여 소개하고자 한다. 이를 위해 건물과 진동제어기의 연계된 운동방정식(Coupled equation of motion)으로부터 비연계 운동방정식(Decoupled equation of motion)을 유도한다. 유도된 비연계 운동방정식을 기반으로 건물의 응답과 진동제어기의 응답을 각각 시스템 식별을 위한 입력과 출력으로 하여 일반적인 시스템기법을 이용하여 동특성을 추정할 수 있도록 한다.</P>

Fabrication of Patterned Fluorescence Images in Electrospun Nano/Micro Fibers

김홍진,김종만,이철희,문성윤 한국고분자학회 2008 한국고분자학회 학술대회 연구논문 초록집 Vol.33 No.2

기업재난관리시스템 평가모델의 유효성 분석

김홍진,박광박,황승국 경남대학교 산업경영연구소 2008 지역산업연구 Vol.31 No.1