• 한국HCI학회:학술대회논문집
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• 2008.02b
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• pp.417-423
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• 2008

It produced a movie to show spectators by interacting the existing famous drawings. It tried a new concept of binding a famous drawing with a person. It recognizes the color of a spectator and the drawings are changed. A spectator is reflected in the work of Marc Chagall. At the same time it is expressed with different BGM that meets the identity of a work. When a spectator moves, the motion is reflected on a work. But without a motion, a work is naturally shown. The four famous drawings are produced to response to Red, Green and Blue of a spectator according to color tracking.

• Proceedings of the IEEK Conference
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• 1998.06a
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• pp.753-756
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• 1998

본 논문은 연속적인 수화 동영상에 있어서 가장 의미가 있는 손 영역을 검출하는 방법에 대한 연구이다. 부자연스러운 센서 등을 피하고 사용자 친화성과 범용성 및 실시간 구현을 도모하기 위하여 흑백 동영상의 처리가 요구된다. 농아자의 수화를 인식하기 위해 전철로서, 복잡한 배경으로부터 손 영역의 검출은 매우 중요하다. 정확한 손 영역의 검출로 수화 인식률의 개선과 영상처리의 고속화가 가능하다. 제안한 방법은 인접한 프레임간의 차 영상에 대하여 엔트로피를 측정하여 배경영상과 분리를 행한 후, 손 영역에 대한 추적을 수행하였다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1999.05a
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• pp.214-217
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• 1999

Polymeric composite insulators have been in use for outdoor insulation. However, our knowledge about their long-term performance in a outdoor environment is still very limited. Especially, these insulator are subjected to the environmental stress such as ultraviolet radiation. Hence, in this paper. the influence of UV radiation on the aging of the shed materials was evaluated. For the aging evaluation, these insulators studied by experiment methods such as contact angle measurement. oxidation induced time. SEM/EDX, FTRI-ATR, tracking test for the different insulator samples. With the increased UV exposure time, samples are shown to exhibit degradation comparable to those of new ones

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2015.07a
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• pp.504-506
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• 2015

RFID란, 무선 주파수를 이용해 원거리에서 태그의 정보를 판독하거나 인식할 수 있는 객체 인식 기술 중 하나이다. 최근 바코드를 대체하여 RFID 기술을 이용하는 산업이 물류, 유통, 환경, 보안 등 다양한 분야에 걸쳐 전 세계적으로 성장세를 보이고 있는 추세이다. 특히 RFID 기술 중 위치 탐지 및 측정 기술을 이용한 사례가 많다. 본 연구에서도 이러한 기술을 이용하여 공항이나 쇼핑몰 등과 같은 넓고 개방된 공간에서 객체들을 추적하는 시스템을 구현하고자한다. 모든 객체들이 RFID를 가지고 있는 환경에서 Cluster와 센서 네트워크를 이용해 RFID를 감지하면 RFID의 데이터를 서버에 전송하고 서버는 이 데이터들을 분석하여 객체의 위치 및 동선을 추적한다. 객체 추적을 함으로써 정확하고 신뢰성이 있는 데이터를 얻는 것을 본 연구의 목적으로 한다.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.60 no.3
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• pp.471-478
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• 2011

This paper proposes a method of maximum power point tracking (MPPT) using fuzzy logic control for grid-connected photovoltaic systems (PV). First, for the purpose of comparison, because of its proven and good performances, the incremental conductance (IncCond) technique is briefly introduced. A double fuzzy logic controller (DFLC) based MPPT is then proposed which has shown better performances compared to the IncCond MPPT based approach. Modeling and Simulation in grid-connected PV system results are provided for both controllers under same atmospheric condition based PSCAD/EMTDC. The double fuzzy logic MPPT controller is then simulated and evaluated, which has shown better performances.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.66 no.1
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• pp.121-126
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• 2017

Tracking system is essential for Image Guided Surgery(IGS). Optical Tracking System(OTS) is widely used to IGS for its high accuracy and easy usage. However, OTS doesn't work when occlusion of marker occurs. In this paper sensor data fusion with OTS and Inertial Navigation System(INS) is proposed to solve this problem. The proposed system improves the accuracy of tracking system by eliminating gaussian error of the sensor and supplements the disadvantages of OTS and IMU through sensor fusion based on Kalman filter. Also, sensor calibration method that improves the accuracy is introduced. The performed experiment verifies the effectualness of the proposed algorithm.

• Journal of Cadastre & Land InformatiX
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• v.44 no.1
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• pp.139-150
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• 2014

Recently the violent crimes is the emerging social issue and the crime prevention is important policy both for maintenance of public order and the national welfare. To prevent these crimes with the geospatial data, we study the geospatial crime DB features, analytical method and linking method of current National Police Agency's crime system data. In this study, the Geospatial Information Open Platform(Vworld) was used to map the test site crime DB on the thematic map. We also researched the mesh-up thematic map and optimal location model of petrol car and CCTV.

• Convergence Security Journal
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• v.6 no.1
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• pp.33-43
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• 2006

RFID System has an advantage that it need not touch an objects for identification of many objects. Because it is working through wireless communication. Also, So many objects can be identified with RFID System at once. However, although RFID System has convenience like above, it has serious privacy concern at the same time. If RFID System is working with an target object through wireless communication, other objects will respond to RFID System signal as well as a target object. Hence, RFID System can be easily exposed user privacy by attacker. In this paper, We propose RFID system authentication model in order to protecting user privacy and traking. Proposed RFID system is operating that not only server authenticate RFID reader but also RFID reader and tag authenticate mutually by using symetric cryptography that operating with tiny and simple processing.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.23 no.4
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• pp.787-795
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• 1998

In this paper, we have improved the speed of gradient operation, which needs to calculate Optical Flow for estimating a moving object, and proposed a method which estimate the contour of a moving object by the logical operationg of Optical Flow and edge in noisy images. The proposed method, which recognize to a moving ogject and traking a moving object, using logical operation of Optical Flow and edge in low-level has a advantage that is simpler than the known method for moving objects estimation. In addition, we have simulated several images using method I and method II on improved Gradient operation speed. When we have compared the average value of total operation time, method I is improved with 12% of operation speed compared with the known method, method II is improved with 38% operation speed.

• The Transactions of the Korean Institute of Power Electronics
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• v.16 no.6
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• pp.561-568
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• 2011

This paper describes the operation characteristic of a single-phase PFC converter with 1-switch voltage doubler strategy for single-phase double-conversion UPS. A single-phase PFC converter with 1-switch voltage doubler strategy needs a diode bridge and one bidirectional active switch. Thus it is possible to reduce the material cost. However, the study results of operation characteristic and controller design has not been known after the converter circuit was proposed. For the performance evaluation of PFC converter, single-phase 3kVA double-conversion UPS was tested. The performance of PFC converter is experimentally confirmed with followings - input current reference traking, input power factor correction.