Earticle

The effect of annealing time in Metal Organic Deposition(M0D) method was investigated at reduced total pressure. As the total annealing pressure was reduced, the growth rate of YBCO films increased from 0.14nm/sec at atmospheric pressure to 4.2nm/sec at 1 Torr. For the total pressure of 700, 500, 300, 100, and lTorr, the optimal annealing times of 60, 40, 20, 10, 2minutes were found in our experimental conditions. When the annealing time was short, poor crystallinity or un-reacted phase was obtained. Also, the degradation of YBCO films occurred when exposed longer to the humid ambient at the high annealing temperature. The reduced pressure was found effective to increase the growth rate and to control the pore size of the YBCO films in MOD method. A fast growth of MOD-YBCO films was realized with high critical current density over 1MA/cm2 using reduced pressure annealing. Large pores, usually observed at atmospheric pressure in MOD method, disappeared and also, the number of pores was reduced

Oxide buffer layers for YBCO coated conductors were fabricated using MOD processing and development of microstructure and texture were investigated. A CeO2, buffer layers were formed on RABiTS tape. Acetate-based precursor solution was employed to synthesize the precursor solution. Subsequently, the precursor solution was stabilized and modified with triethanolamine. CeO2 precursor gel film was coated and annealed in Ar/H2 atmosphere at high temperature. An annealed CeO2 film shows mixed orientation with high (001) texturing. It was shown that (111)texture of CeO2 layers were enhanced by multiple coating. This degradation was attributed to development of microcracks in the multiply coated CeO2 films. Also discussed are the synthesis and the characterization of La2Zr2O7 (LZO) buffer layers on RABiTS tape. A biaxially textured LZO buffer layer was fabricated with MOD processing method using metal alkoxide based precursor solution. It was shown that the LZO film were epitaxially grown on RABiTS tape and crack-free & uniform surface was obtained after annealing in Ar/H2 atmosphere.

본 논문은 레이더 센서, 비전 센서를 활용한 다중 센서 융합 기반 움직임 검지에 관한 연구를 다룬다. 레이더 센서는 다량의 물체를 검지함에 있어 센서 자체의 움직임이 발생할 경우 주변건물이나 주변 가로수와 같은 사물 혹은 물체를 차량으로 오인하는 경우가 생긴다. 비전 센서의 경우 저렴하고 가장 많이 쓰는 형태이지만 빛, 흔들림, 날씨, 조도 등 외부환경에 취약하다는 문제점이 있다. 각 센서 간의 문제점을 보완하고자 센서 융합을 통한 움직임검지를 제안하게 되었고 실험환경 내에서 매우 우수한 검지율을 보이게 되었다 센서 간 융합에서 좌표 통일문제와 실시간 전송문제 등을 해결하였으며, 각 센서 간 필터링을 통한 비가공데이터(raw data)의 신뢰성을 높였다. 특히 영상에서는 가우시안 혼합모델(GMM, Gaussian Mixture Model)을 사용하여 레이더 센서의 단점을 극복하고자 했다.

This Paper is for A study of sensor fusion using Radar sensor and Vision sensor in moving object detection. Radar sensor has some problems to detect object. When the sensor moves by wind or that kind of thing, it can happen to detect wrong object like building or tress. And vision sensor is very useful for all area. And it is also used so much. but there are some weakness that is influenced easily by the light of the area, shaking of the sensor device, and weather and so on. So in this paper I want to suggest to fuse these sensor to detect object. Each sensor can fill the other’s weakness, so this kind of sensor fusion makes object detection much powerful.

The effect of the addition of the nano size Y2O3 powder on the microstructurte and superconducting properties of YBCO thin film deposited on LAO single crystalline substrate by TFA-MOD method was studied. Nano size Y2O3 powder was added to the stoichiometric precursor solution with a cation ratio of Y : Ba : Cu = 1 : 2 : 3 prepared using TFA as chelating agent. Precursor solutions with and without Y2O3 addition were coated on LaAlO3(100) single crystalline substrates by dip coating method. Calcination and conversion heat treatments were performed in controlled atmosphere containing moisture Current carrying capacity(Jc) of YBCO film was enhanced about 50 % by Y2O3 doping and it is thought to be due to the better connectivity of YBCO grains and/or the flux pinning by the Y2O3 particles embedded in YBCO grains.

본 논문에서는 ATM-LAN상 Navigation서버를 이용한 브라우징 메카니즘, 서버와 클라이언트, 응용, AAL과 Qos간 협상 및 예약 절차의 세션 설정 기술, 프레임의 분열 및 재결합에 관한 알고리즘을 제안하고 구현한 후, 실험 평가한다. 그리고 사용자에게 효율적인 서비스를 제공하기 위한 서비스 관리 모델로서 서비스 메니저를 모델링한다.

본 논문에서는 ATM-LAN 환경의 MOD 서버들로부터 클라이언트들에게 프레임 기반의 CM(Continuous Media) 데이터 스트림을 전송하기 위한 기술들을 제안한다. 여기서 프레임이란 CM의 디스플레이 단위를 의미한다. 세부적으로는 수송 계층과 IP 계층의 개입없이 애플리케이션과 AAL이 직접적으로 접속함으로써 ATM-Specific한 native ATM 서비스를 적용한다. 또한 네비게이션 서버를 통한 투명한 브라이징 메카니즘, 서버와 클라이언트들간의 PVC를 통한 세션 설정 과정, 애플리케이션과 AAL과 QoS 협상 및 예약 과정, MIU 사이즈를 초과하는 프레임들에 대한 쪼갬/붙임 알고리즘 등을 제안하고 실험 결과를 제시한다.

In this paper, We suggest a technique for delivering frame(CM transfering unit) based CM data streams from MOD servers to clients on ATM-LAN environment. The term 'frame' indicates the CM transferring unit. In detail, each clients try to adapt native ATM-specific service which can be connected directly from application layer to AAL without convening transport and IP layer. Also, we suggest and show result of implementation about transparent browsing mechanism using navigation server, session setting procedures using PVC between server and clients, application, AAL and QoS negotiation and reservation procedure, splitting and reassembling algorithm for frames over MTU size.

Knowledge transmission near the young adults in situation of handicap is part from now on of the managerial concerns of the companies. It holds an important place in the relations between the various generations of employees since the transmission became a major stake of integration. Its experimental methods (relation of assistance, accompaniment, guardianship, coaching, visit of site) are numerous and fall under a marked logic of professional insertion. Up to what point does the intergenerational transmission of the knowledge support the training of the young adults in situation of handicap confronted with differentiated cultures of training? Two competitor models of transmission can be highlighted and discussed at the glance of the professionalization of the referents which contribute to insertion in the youth employment handicapped.

본 연구는 MOD 환경에서 규칙 기반 및 최적화 기반 배차 전략의 성능을 비교하기 위해 동적 라우 팅 시뮬레이터를 설계·구현하였다. 시뮬레이터는 실제 도로망 기반 경로 탐색과 요청 관리 기능을 포 함하며, 다양한 환경에서 전략별 응답 시간, 실차율 등을 정량 평가한다. 이를 위해 인천 영종도 지역 I-MOD 서비스 데이터를 기준으로 모의 운행 결과에 대한 검증 및 평가를 시행하였다.