• 한국의류학회지
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• 제23권8호
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• pp.1161-1169
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• 1999

This research was aimed to identify the artifact type and their characteristics of the textile related materials excavated from Koryo Dynasty tombs of Hyungok-ni Danyang. Microscopy solubility test energy dispersive X-ray spectroscopy(EDS) and fourier transform infrared spectroscopy (FT-IR) fabric density test were used for the identification and when necessary standard samples were made in order to compare its characteristics with hose of the original artifact, the result indicated that the artifacts included both textile and paper. Artifacts from Burial 14 were comprised of textile fragments FT-IR and the solubility test conducted on the artifact indicated that the textiles were made with ramie woven with plain weave technique in a fairly loose fabric density. Rest of the artifacts were all comprised of paper.

• East Asian mathematical journal
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• 제32권4호
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• pp.565-587
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• 2016

The purpose of this study was to analyze the understanding of the meaning of fraction division and fraction division algorithm of elementary mathematical gifted students through the process of problem posing and solving activities. For this goal, students were asked to pose more than two real-world problems with respect to the fraction division of ${\frac{3}{4}}{\div}{\frac{2}{3}}$, and to explain the validity of the operation ${\frac{3}{4}}{\div}{\frac{2}{3}}={\frac{3}{4}}{\times}{\frac{3}{2}}$ in the process of solving the posed problems. As the results, although the gifted students posed more word problems in the 'inverse of multiplication' and 'inverse of a cartesian product' situations compared to the general students and pre-service elementary teachers in the previous researches, most of them also preferred to understanding the meaning of fractional division in the 'measurement division' situation. Handling the fractional division by converting it into the division of natural numbers through reduction to a common denominator in the 'measurement division', they showed the poor understanding of the meaning of multiplication by the reciprocal of divisor in the fraction division algorithm. So we suggest following: First, instruction on fraction division based on various problem situations is necessary. Second, eliciting fractional division algorithm in partitive division situation is strongly recommended for helping students understand the meaning of the reciprocal of divisor. Third, it is necessary to incorporate real-world problem posing tasks into elementary mathematics classroom for fostering mathematical creativity as well as problem solving ability.

• 한국조경학회지
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• 제32권3호
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• pp.32-42
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• 2004

This study aims at establishing an ecological planning for road construction. which is considered to be a main cause of damage to the natural environment in Korea. This study focuses on the Pyungtak-Eumsung Highway development project. It considers the ecological factors and status of the site and its surrounding area. The study site is a four-way highway with a width of 23.4m and a length of 5.7km that spans from Hyungok-ri, Anseong City, Kyeonggi Province to Jukhyun-ri, Jincheon-gun, Chungbuk Province. The objective of the plan is "the establishment of an eco-road in harmony with nature." The plan is divided into five detailed goals: 1) restoration of river morphology and ecosystem through ecological planning; 2) establishment of wet biotopes; 3) construction of ecological corridors; 4) restoration of damaged forest ecosystems; and 5) ecological restoration of the roadside slopes that are linked with the surrounding forest. A master plan has been developed based on the detailed goals. The master plan involves: 1) establishment of a natural river, wet biotopes, and ecological corridors that facilitate the movement of amphibians, wild fowls, mammalians and fish; 2) development of a planting plan for the visitor center, the tunnel entrance, and soundproof banks; and 3) the presentation of a planting model for restoring roadside slopes that are connected to the surrounding forest. The eco-road plan needs to entail ecological conservation and restoration plans. In addition, a monitoring plan for ecological corridors and habitats should be included in the comprehensive plans, along with the continuous development of environmentally friendly technologies.

• 대한지구과학교육학회지
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• 제5권1호
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• pp.51-59
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• 2012

The purpose of this study was to examine the effects of Future Problem Solving Program on creativity and scientific attitude. For this study the 4 grade, 2 class was divided into a research group and a comparative group. The class was pre-tested in order to ensure the same standard. The research group had the science class with FPSP, and the comparative group had the class with teacher centered lectures for 9 classes in 10 weeks. The FPSP was focused on finding problems, finding key problems, creating solutions, selecting the standard of judgement, making alternative solutions, and learning creative steps of solutions consisting of development of action planning. To prove the effects of this study, creativity was split up according to fluency, originality, abstractness, accuracy, and openness. Also, scientific attitude consisted of honesty, patience, curiosity, preparedness, autonomy, criticism, and openness. The results of this study are as follows. First, the science class with FPSP with finding problems, finding key problems, and creating solutions had the effect of developing the scientific creativity; fluency, originality, abstractness of the title, accuracy, and openness. Second, the FPSP had the effect of developing the scientific attitude. Students made ideas and solved the problems through divergent thinking and convergent thinking. During the class it had the effect of developing the scientific attitude; honesty, patience, curiosity, preparedness, autonomy, criticism, and openness. As a result, the elementary science class with FPSP had the effects of developing scientific creativity and scientific attitude. It means the science class with FPSP has potential possibilities and value to develop scientific creativity and scientific attitude.

• 농촌의학ㆍ지역보건
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• 제28권2호
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• pp.61-70
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• 2003

농업 기계화가 급속하게 진행되면서 기계의 사용이 증가하면서 많은 사고가 발생하였다. 이 중 경운기는 빈번한 교통사고로 그 피해가 막대하였다. 이에 본 연구자들은 경운기 교통사고의 실태를 조사하고 경운기 뒷면에 부착된 반사등 유무에 따라 교통사고의 발생에 어떤 영향을 미치는지 알아보고자 이 연구를 수행하였다. 경운기 교통사고는 경주시 현곡면의 경우 최근 5년간, 포항시 기계면은 최근 2년간에 발생한 사고를 대상으로 하였다. 면사무소와 경찰서를 방문하여 경운기 관련 교통사고를 조사하였고, 경미한 사고의 경우 직접 조사하였다. 본 연구에서 경운기에 의한 교통사고는 반사등이 효력을 나타내는 시간대인 새벽이나 밤 등 어두운 시간대에 일어난 자동차 대 경운기의 추돌 사고로 정의하였다. 정의에 따라 9건의 경운기 교통사고를 조사하였으며, 경운기 운전자의 나이, 성별, 운전 경력 등에 따라 미사고군 36건을 선정하여 총 45건을 대상으로 환자-대조군 연구를 수행하였다. 사고군과 미사고군에 대해 설문조사를 실시하였다. 설문지에는 운전자의 일반적 특성, 반사등의 예방효과와 경운기 안전에 대한 인식도 등의 항목을 포함하였으며, 사고군에 대해서는 사고 당시의 계절, 시간, 장소, 반사등 부착유무 등의사고 상황을추가 조사하였다. 본 연구 대상에서 정의한 경운기 교통사고는 총 9건이었다. 미사고군 36건을 포함한 전체 44대의 경운기 중 현재 반사등 부착 경운기는 32대(72.7%)이었다. 현재 반사등의 상태에 대해 양호하다고 응답한 사람은 사고군 6명(75.0%), 미사고군 12명(50.0%)으로 응답자 32명 중 18명(56.3%)이었다. 야간운행 시 반사등의 예방효과에 관한 인지도 조사에서는 사고군 7명(87.5%), 미사고군 19명(52.8%)으로 응답자 44명 중 26명(59.1%)이 인지하고 있었다. 경운기 반사등 부착운동에 대한 인지도는 사고군 8명(100.0%), 미사고군 30명(83.3%)으로 전체 44명 중에서 38명(86.4%)이 인지하고 있었다. 경운기 안전수칙에 관한 인지도 조사에서는 사고군 6명(75.0%), 미사고군 26명(72.2%)으로 전체 44명 중 32명(72.7%)이 인지하고 있었다. 반사등 부착 유무에 따른 사고율은 반사등 부착군 7.7%, 반사등 미부착군 36.8%로 반사등 미부착군에서 유의하게 사고율이 높았다. 반사등 부착 경운기에 대한 반사등 미부착 경운기의 교차비는 7.00(95% CI: 1.26-38.99)이었다. 본 연구 결과에 의하면 경운기 사고는 반사등 부착에 의해서 크게 감소될 수 있을 것으로 생각한다. 그동안 인식 부족으로 많은 경운기 사고가 정확한 원인 조사가 이루지 않았을 가능성이 높다. 따라서 보다 광범위한 조사를 바탕으로 경운기 사고에 대한 체계적인 연구가 필요하다. 또한 경운기 사고에 대한 의료인의 관심이 필요하며 사고 예방을 위해서 정부의 현명한 대책이 중요하다.