• 한국항행학회논문지
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• 제14권2호
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• pp.206-212
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• 2010

본 논문에서는 유비쿼터스 환경에서 로봇의 응용서비스를 제공하는데 필요한 네트워크로서 로보틱 지그비 네트워크의 개념을 소개하고 이를 이용한 응용 시나리오를 제시한다. 제시한 응용시나리오의 기본이 되는 네트워크 연결 및 데이터 전송에 관한 실험을 수행하였다. 이 실험 결과를 통해 앞으로 Robotic Zigbee Network를 이용한 위치인식 오차율을 최소화하는 로봇의 위치추정 및 추적 알고리즘 개발의 기반을 마련한다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2001년도 춘계학술발표논문집 (하)
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• pp.793-796
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• 2001

XML은 강력한 데이터 표현능력을 인정받아 전자상거래와 같은 데이터 처리 분야에 적극적으로 도입되고 있다. 하지만 XML을 이용하여 다른 조직이나 사용자간에 원활한 데이터 교환과 사용을 위해서는 공통적으로 사용할 수 있는 태그나 용어가 표준화되어야 한다. 현재 이와 같은 표준화 작업은 CommerceNet에서 주관하는 xCbl이 주를 이루고 있으며, RosettaNet과 BizTalk에서도 자신의 고유한 문서 표준을 채택하고 있다. 하지만 위의 표준은 B2B간의 상품이나 서비스에 대한 포괄적인 관점으로 기술되었기 때문에 상품 자체의 세부적인 정보 표현에는 부족한 점이 있다. 또한 현재 국내에서 이와 같은 표준에 대한 구축이 초기 단계에 있기 때문에 산업별, 산업간 정보 연계를 위한 표준화가 시급하다. 본 논문에서는 이와 같은 표준화 작업의 일환으로 XML에 기반 하여 가능한 모든 상품을 기술할 수 있는 표준 모델을 제시하고 이를 XML의 DTD로 구현하였다.

• Asian Journal of Atmospheric Environment
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• 제7권4호
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• pp.199-208
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• 2013

Mercury exchange fluxes between atmosphere and soil surface were measured in two different types of soils; lawn soil (LS) and forest soil (FS). Average Hg emission from LS was higher than from FS although the soil Hg content was more than 2 times higher in forest soil. In LS, Hg emissions were much greater in warm season than in cold season; however, deposition was dominant in FS during warm season because of leafy trees blocking the solar radiation reaching on the soil surface. In both LS and FS, Hg fluxes showed significantly positive correlations with UV radiation and soil surface temperature during cold season. In addition, it was observed that emission showed positive correlation with UV radiation and soil temperature while there was negative relationship between deposition and UV radiation.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.60-60
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• 2000

CAN(Controller Area Network) is a serial communication protocol which specifies very low cost and high performance. It is widely used in rea1-time control applications such as automobiles, aircraft, and automated factories. The main application fields are industrial control systems and embedded network. In this paper, the CAN monitoring system is proposed and implemented. Also its performance is tested in the mobile robot which is integrated by CAN and its performance lot receipt failure rate is evaluated. This can be used to analyze the performance of the network. It can tie also used to manage and monitor the network.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.118-118
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• 2000

This paper suggests the methodology to guarantee the rea1-time service over Ethernet and TCP/IP and to solve the problems such as re-transmission due to collision and platform-transparency and independence. This paper proposes a new mechanism called Real-time Ethernet protocol combined the centralized medium control mechanism with the token passing mechanism. The centralized medium control mechanism is used to get the token, the right to transmit the data, and the token passing mechanism is used to return the token to the token controller and to transmit data within the specified time interval. The proposed Real-Time Ethernet Protocol is based on Java and Java RMI(Remote Method Invocation). The presented protocol is believed to work enough in real-time applications considering latency occurred due to the Java RMI, which is less small than data transmission time.

• 지역연구
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• 제11권2호
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• pp.1-17
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• 1995

Regional production structres are investigated through an estimation of three-input(labor, capital and material) translog cost function. The estimation uses the pooled data in which time series data of 1970-1990 are combined with cross-sectional data corresponding to firm sizes. The empirical finding are the following: (1) the factors are Allen substitutes each otner in general except Pusan and a couple of regionss, and (2) estimates are very small in its absolute value irrespective of the regions. The low elasticity estimates of this study implies that substitytability among the three inputs are very weak in the regional manufacturing production compared to that in the national production. Seoul-Kyungki metropolitan area produces not only the smallest elasticities but relatively stable estimates without much fluctuation between the sub-regions of the area.

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 2007년도 춘계학술논문발표회 논문집
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• pp.367-372
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• 2007

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 2008년도 춘계학술논문발표회 논문집
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• pp.37-43
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• 2008

• 한국농림기상학회:학술대회논문집
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• 한국농림기상학회 2005년도 추계 학술발표논문집
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• pp.11-14
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• 2005

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1996년도 추계학술대회 논문집
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• pp.160-163
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• 1996

To develope output characteristics of GaAs MESFET, which utilized in high frequency ranges, $Al_{0.2}$Ga$_{0.8}$As/GaAs layer was used. In this case, to minimize effects of deep-level in $Al_{0.2}$Ga$_{0.8}$As/GaAs layer, aluminium mole fraction was design to 0.2. HP 4145B was used in measurement, I$_{dss}$ was 25mA when V$_{G}$=0. Maximum transconductance was 168.75mS/mm, electron mobility was 3750 $\textrm{cm}^2$/V-s, therefore, it must be suitable for active device in MMIC. Also, Ideality factor was 1.26, which was similar to that of ideal schottky diode.