• 한국지구과학회지
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• 제27권7호
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• pp.730-744
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• 2006

The United States curriculum reform movement has recently started in each area of science education. The initiatives on curriculum reform stem from a notion that the low rate of science curricula offered in schools has been a serious problem. The schools in the United States are not only facing a lack of offerings within science curricula but also low enrollment in science courses, especially in physics, chemistry, and earth science. This trend resulted in low performances on international achievement tests including TIMSS and PISA. This paper introduces the efforts to solve existing problems through curriculum reform; including ChemCom, BioCom, EarthComm, and Active Physics. In this paper, a discussion is presented to show how the curricula can help address the status quo in science education. More specifically, this paper focuses on curriculum reform in high school earth science (EarthComm), providing a closer look at the scope and sequence of the reform movement. EarthComm was chosen because it was released based on the development of the National Science Education Standards (NRC, 1996). Consequently, EarthComm became a curriculum that espoused the visions of the Standards, which has been guiding the reform of the US curriculum. At the end of this paper, two research outcomes of the EarthComm curriculum implementation in schools are discussed in terms of student learning and differences from conventional curricula.

• 한국지구과학회지
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• 제28권5호
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• pp.620-634
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• 2007

The purpose of this study was to investigate the effectiveness of EarthComm implementation in the U.S. high schools in terms of demographic background including school size, urban/rural area, and teachers' teaching experiences. In addition, this study examined impact of students' higher-order thinking skills by using the visions of National Science Education Standards. Two modular of the EarthComm curriculum were used for this purpose with thirty one teachers and around thousand students involved across four states. Findings were that EarthComm did not significantly impact student achievement differentially in schools of varying sizes and school location, i.e., urban and rural areas. The years of teaching experiences did not impact student achievement scores for Module I but did significantly impact for Module II. It is noted that the two results seemingly conflict with each other similar to other research findings (Ferguson, 1998; Yager et al., 1988). Student higher-order thinking skills, on the other hand, were significantly improved as a result of studying with EarthComm. Implications were discussed at the end of the paper.

• Journal of Astronomy and Space Sciences
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• 제15권2호
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• pp.417-425
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• 1998

Monte Carlo analysis is performed for the first acquisition and tracking of the KOMP-SAT spacecrat in GSOC tracking station after separation from Taurus launch vehicle. The error bounds in position and velocity vector in Earth-fixed coordinate system at injection point are assumed based on the previous launch mission. Ten thousands injection orbital elements with normal distribution are generated and propagated for Monte Carlo analysis. The tracking antenna pointing errors at spacecraft rising time and closest approach time at German Space Operations Center(GSOC) Weiheim track-ing station are derived. Then the tracking antenna scanning angles are analyzed for acquisition and tracking of the KOMPSAT signal.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2001년도 추계종합학술대회
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• pp.745-748
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• 2001

디지털 선박은 자율운항 제어 시스템(Intelligent Navigation System), 선박자동식별 시스템(Automatic Identification System), 위성통신망 원격제어 시스템(Integrated Maritime Information Technology)을 기반의 One-man Bridge 시스템을 갖는 차세대 선박을 나타낸다 INS 시스템에서는 선박의 항해와 관련된 기능을 수행하며, 최적항로 계획, 좌초 및 충돌방지 기법, 경제적 운항, 엔진통합제어, 내항성 성능평가 등의 기능이 디지털 GIS(Geographic Information System) 기반의 환경에서 제공된다. AIS 시스템은 선박과 선박간 또는 선박과 관제소간에 선박의 항해 관련 정보를 주기적으로 전송하여 충돌 방지를 기능을 제공하며, IMIT 시스템은 선박내의 통합 플랫폼을 제공하여 선내 네트워크 통합 솔루션을 제공한다. 또한, IMIT 시스템은 위성통신(INMARSAT, OrbComm, 해양관측위성)을 통해 선박과 관제소와의 데이터 송수신을 지원하여, 관제소에서 선박의 항해 상태를 감시하고 선박에 해양 환경정보, 조선소에서의 선박관련 정보 등을 제공하는 기능을 갖는다. 본 논문에서는 디지털 선박의 전체적인 시스템 구현방안과 세부 시스템별 구현방안에 대해 소개하며, 디지털-lT 기반의 차세대 선박에 대한 방향을 제시하도록 한다.