• Journal of the Korean earth science society
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• v.23 no.3
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• pp.207-220
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• 2002

The purpose of this study was to verify the trends of Korean students' achievement of earth science, especially the gender differences, in recent two international comparative studies, TIMSS-R (The Third International Mathematics and Science Study-Repeat) and PISA 2000 (Programme for International Student Assessment). To achieve this purpose, the 33 earth science items in TIMSS-R and 13 earth and environmental science items in PISA 2000 were analyzed. As a result of the comparison between Korean- and international percent correct, Korean students showed especially higher achievement in close-ended items or items required 'understanding of simple information.' Korean students, in particular Korean male students, also showed higher achievement in items of data interpretation. On the other hand, Korean students, in particular Korean female students, showed relatively lower achievement in astronomy items. The serious gender differences occurred in all aspects of items, regardless of item content, item format, and performance expectations.

• Journal of the Korean earth science society
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• v.32 no.2
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• pp.200-211
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• 2011

The purpose of this study is to investigate the effects of astronomical animation module on students' conceptual change regarding the concepts of diurnal motion of stars. Four students participated in this study, who never learned about the diurnal motion of stars. An animation module was developed by using Flash MX to readily understand the concept of space. In addition, we inserted a teacher's voice with supplementary materials into the animation module to help students learn individually. The animation module was comprised of the movement of the Earth, the Moon and the planet. The earth science gifted students' preconception on diurnal motion of stars was analyzed with pre-test using questionnaires and interviews. After the instruction with animation module, the effect of conceptual change was examined by comparing pre and post-test. The results indicated that three students correctly presented about the motion of the star by all directions in middle latitude. Four students showed their understanding that stars travelled straight in all directions. Finally, all of four students whose preconceptions were that the star rotated perpendicularly showed the conceptual change of diurnal motion that the star traveled diagonally.

• 주택과사람들
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• s.197
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• pp.52-55
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• 2006

최근 고분양가 논란이 일고 있는 은평뉴타운의 1지구 A~C공구와 2지구 A공구가 10월 분양에 들어갈 예정이다. 은평뉴타운은 아파트의 외관을 다양화해 일조, 조망, 환기 그리고 입주자의 생활 형태에 맞춘 설계를 계획하고 있다. 리조트형 생태 전원도시를 지향하는 은평뉴타운의 4개 공구별 특장점과 대표적인 4가지 평형에 대해 살펴보았다.

• Aerospace Industry
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• v.46
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• pp.54-57
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• 1996

날이 샐 무렵 멀리있는 작은 별들이 자취를 감출 때 서쪽 하늘에 밝게 빛나는 큰 별 속칭 샛별이라는 그 별이 바로 화성이다. 사람들의 눈에 띄기 어려운 시간에 크게 나타나는 별이기 때문에 달처럼 친숙한 많은 이야기는 없지만 인공위성을 띄우고 달나라에 사람을 보내고 달 표면에 흙을 가져온 지구인의 과학은 드디어 화성 탐사에 도전하게 되었다.

• Journal of the Korean earth science society
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• v.31 no.2
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• pp.164-171
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• 2010

The purpose of this study was to investigate the effects of instruction applying 3D Planetarium Software (Starry Night Pro 6.0) in terms of the learners' science achievement, changes of attitude (attitude toward science as well as scientific attitude), and self-directed learning ability. Participants were 198 $8^{th}$ graders. This study adopted a quasi-experimental research design in which experimental group was taught with 3D planetarium software vs. control group with traditional lecture-centered teaching method for 6 hours. The effects were investigated by independent sample t-test and paired sample t-test The results are as follows. The instruction using 3D planetarium software was more effective than the traditional lecture-centered curriculum in science achievement and self-directed learning ability. However, there were not meaningful differences in analyzing attitudes related science, the results that were so effective in elevation for self-directed learning could be gained. Students were interested in instruction applying 3D planetarium software, which was helpful for them to understand the content knowledge. Results showed that instruction with 3D planetarium software applied was effective in $8^{th}$ grade science learning.

• Journal of the Korean Society of Earth Science Education
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• v.11 no.3
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• pp.212-223
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• 2018

The purpose of this study is to investigate the perception of elementary students' 'global environment'. The research method used the Sementic Network Analysis method of the global environment elements which appeared in the students' explanation about the picture and the picture that emerged about the 'global environment'. The results of the study are as follows. First, as a result of analyzing the students' explanation of the pictures along with the pictures of the students, the elementary students were perceived negatively about the global environment such as 'environmental pollution', 'global warming' and 'trash problem'. Second, as a result of analyzing the image of the global environment expressed in the picture, there were many images expressed from a everyday viewpoint rather than a macroscopic viewpoint, and there was a tendency to express the earth personified. In addition, the picture expressing the clean earth environment expressed the most trees with natural environment elements and expressed the healthy earth with various natural elements such as sea, mountain, and land. Third, as a result of analyzing the difference of perception of global environment by grade, it was found that the difference of perception of global environment by grade was not much different.

• Journal of the Korean earth science society
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• v.43 no.2
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• pp.303-311
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• 2022

Gadolinium, commonly used as a contrast agent for magnetic resonance imaging (MRI), is discharged into aquatic environments without removal after treatment in wastewater treatment plants (WWTPs) because of its high stability. In this study, we collected water samples from Suyeong WWTP, Busan, to investigate the dissolved rare earth element (REE) removal capacity of each wastewater treatment process and to evaluate the discharge of anthropogenic Gd (Gd_anth) from effluents. As wastewater passed through each stage of treatment, the concentrations of light REEs (La-Eu) decreased, whereas those of heavy REEs (Tb-Lu) were relatively consistent. Negative Sm anomalies (<1) were observed in several samples, indicating that Sm can be removed by adsorption onto particles or phosphate during the biological removal process. Positive Gd anomalies (149±50, n=9) were observed in all samples. The ratios of Gd_anth concentrations to measured Gd concentrations in all wastewater treatment processes were higher than 97%. This indicates that Gd_anth was discharged to the Suyeong River without removal during the wastewater treatment process. Considering the daily treatment capacity in each process, the total flux of Gd_anth was estimated to be 259 mmol/day. Our results suggest that mid- and/or long-term monitoring of Gd is needed because Gd_anth is continuously discharged into Suyeong Bay through WWTPs.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.1769-1774
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• 2009

재해 복구란 국가, 유역은 물론 지구단위 차원에서 개발이 진행 중인 통합적 개발과정으로 추진되어야 한다. 따라서 피해를 입은 기간시설의 단순 재배치나 복원이 아니라 피해지역의 사회, 경제적 조건은 물론 재해 전, 중, 후에 지역사회가 지닌 취약성을 개선하는 기회로 추진되어야 하며 주민들의 신뢰를 회복하고 지속가능한 발전을 추구해야 한다. 국내외 복합피해지역의 복구사례로 강릉시(2002, 태풍 루사), 김천시(2002, 태풍 루사), 미국 뉴올리언스(2005, 허리케인 카트리나)의 피해상황과 복구사업을 대상으로 조사 정리하였다. 복합피해지역의 지구단위 종합복구를 위한 지구별 복구기법은 피해조사, 종합복구계획의 수립, 종합복구계획의 작성 및 복구사업추진으로 순으로 진행할 수 있으며, 복구사업 시행으로 인한 2차 피해의 방지를 위하여 사업 대상지역은 물론 인근지역에 미치는 영향을 분석하여 사업 대상지에 지구단위종합복구기법을 적용할 수 있을 것이다.

• 한국지구과학회:학술대회논문집
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• 2010.04a
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• pp.72-72
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• 2010

지구과학은 자연과학 중에서 야외 현장에서 자연 현상의 관찰과 조사를 기초로 하는 학문이다. 특히 지질학 분야는 야외 조사를 통해 학생 스스로 탐구하고 문제를 발견함으로써 자연에 대한 흥미와 관심을 갖게 하여 지질학적 현상을 이해하게 한다. 그러나, 충북 지역에서 개발된 야외지질학습장의 부재와 입시위주의 교육환경으로 인하여 교사들은 한정된 범위에서 야외 현장 학습을 계획 및 실시하고 있다. 본 연구에서는 교사들에게 실제 야외학습의 패러다임을 사용한 야외학습장을 개발하여 지구과학 교육과정 중 야외학습의 교육적 자료로 제공 될 수 있도록 하였으며, 이러한 학습장을 토대로 지구과학교육에 야외학습을 쉽게 응용 할 수 있도록 하는데 그 목적이 있다. 이를 위하여 다양한 암석과 지질구조를 가지고 있고, 지리적으로 접근이 편리한 단양군 일대를 야외학습장으로 선정 하였다. 단양군 일대의 야외지질 학습코스에는 앨걸마운드, 어란석, 주상도 작성(석회암층군과 충식석회암), 두족류화석, 부정합관계에 놓인 역암층의 5개의 관찰지점이 있으며 실제 현장에서 각 관찰 지점별로 학생들이 활동할 수 있도록 야외지질 학습 자료를 제시하였다.

• Journal of Astronomy and Space Sciences
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• v.13 no.2
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• pp.181-197
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• 1996

Thc CCD earth image experiment(CEIE) is one of the main payload of the KITSAT-1. Since it was launched on Age. 11, 1992, the CEIE has taken more than 500 images on the earth surface world-wide so far. An image from the space is very different from a feature on the real Earth surface due to various radiometric and geometric distortions. Preprocessing to remove those distortions has to take place before the image data are processed and analyzed further for various applications. This paper summarizes the result of the operation of the CEIE and describes the procedure to perform preprocessing including radiometric and geometric correction.