• Journal of Korean Elementary Science Education
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• v.41 no.2
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• pp.199-216
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• 2022

This study explored the possibility of introducing modern physics into the elementary school science curriculum. The study discussed the need of introducing modern physics to elementary school students and examined the results of certain projects and studies on teaching modern physics to elementary school students. Furthermore, this study proposes several teaching and learning techniques to introduce modern physics into the elementary school science curriculum. Modern physics can be linked to various everyday situations experienced by students and can increase their interest and curiosity in science. Additionally, introducing modern physics to elementary school students who are yet to establish a background on the classical view of nature can help them build a new perspective. Recently, several global projects to introduce modern physics at the elementary level have also reported positive results regarding the increase in student understanding and interest in modern physics. The study briefly proposed specific topics and teaching and learning techniques that could be suitable for the elementary school level. These proposals are expected to advance discussions on the possibility of introducing modern physics. However, appropriate follow-up studies are warranted to confirm the possibility and effectiveness of this initiative.

• Journal of the KSME
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• v.25 no.3
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• pp.176-189
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• 1985

터어보 과급 엔진은 자연흡입식 엔진에 비해 많은 장점을 갖고 있고, 또한 세계적인 터어보 과급 엔진의 증가 추세를 미루어 볼 때 국내에서도 가까운 장래에 터어보 과급 엔진의 폭넓은 적용의 시기가 도래할 것으로 전망된다. 특히 최근 국내 자동차 산업의 기술발전 추세 및 운 수업체의 전반적인 수준 향상의 현실을 고려하면 우리나라에서도 터어보 과급 엔진을 도입 활 용하는데 필요한 모든 기술적 여건은 충분히 무르익었다고 관측된다. 이러한 추세를 감안한다면, 국내의 차량 제조업체, 엔진 제조업체 및 연료분사 핌프와 터어보 과급기 등의 자동차 부품 제 조업체들은 해당 사무분야에서 엔진의 터어보 과급화와 관련되는 기술 및 사업체제를 단계적으로 구축하여 감이 필요하다고 란단되며, 아울러 운수업체에서는 터어보 과급 엔진의 적절한 정비 방법을 도입하고 터어보 과급 엔진 장작 차량의 올바른 운전 지침을 도입 정착시키는 등 터어보 과급 엔진 시대의 도래에 대한 절절한 준비를 하여 나감이 필요할 것으로 본다.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.05a
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• pp.471-474
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• 2008

기업들에게 있어 가격 경쟁력을 갖추기 위한 노력은 끊임없이 이어져 왔으며, 제조 부분에서의 원가절감이나 합리화 등은 어느정도 성과를 이끌어 내는데 성공하였다. 하지만 최근들어 그런 생산비 절감의 경우 점점 한계점에 도달한 모습을 내비치고 있는 실정이며, 이에 기업들은 자연스럽게 매년 그 증가 폭이 커지고 있는 물류로 눈길을 돌리고 있다. 따라서 물류에 대한 관리는 최근 각 기업들에게 있어서 최대 관심사임에 틀림없으며, 이를 위해 기업들은 앞 다투어 물류 정보시스템을 도입하고 이를 활용하려 하고 있다. 하지만 아직까지는 물류 정보의 표준화와 연동 문제 등으로 인해 어려움이 뒤따르고 있는 실정이다. 본 논문에서는 이런 물류정보시스템 운영에 대한 적용 사례를 물류비 시스템을 예로 들어 분석을 해보았으며, 물류정보시스템이 안고 있는 난제를 극복하기 위한 하나의 방안으로 RFID 도입을 통해 물류비 절감과 업무 프로세스 개선을 제시하고자 한다.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.2153-2157
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• 2009

도시하천은 Eco-network의 근간이며, 하천을 통해 인간이 느낄 수 있는 정서적인 안정감, 친밀감, 쾌적함 등 어메니티의 모체로서, 최근 도심내 Open space로서의 위상을 높여가고 있다. 양재천을 위시하여 수원천, 전주천 등 지역을 대표하는 하천들이 자연형 하천으로 정비되어 하천 이용에의 관심이 고조되고, 청계천의 성공을 기점으로 하천의 친수공간으로서의 기능이 강조됨에 따라 도시하천에 대한 개발 요구도는 급속히 높아지게 되었다. 이러한 개발요구의 급속한 증가가 있음에도 불구하고 보전과 이용이 상충하는 도시하천의 어메니티 향상을 위한 기준은 마련되지 않고, 일부 하천에서 이용과 관리의 효율성을 고려하지 않은 무분별한 개발을 부추기게 되어, 오히려 어메니티 향상의 측면에서는 부정적인 결과를 초래하였다. 따라서 본 연구에서는 하천 특성에 적합한 어메니티 도입 기준을 설정하기 위하여 하천의 규모, 자연도, 이용지수를 기준으로 하천유형을 분류하였으며, 이를 바탕으로 지속적인 연구를 진행하여 선진사례와 국내하천조사를 통해 지표요소를 분석하고, 분석된 지표요소에 따라 유형을 추출해내는 과정을 통해 하천유형과 활동유형, 도입시설간의 관계를 설정하여 도시하천 어메니티 향상을 위한 기준으로서 하천복원모델(안)을 제시하고자 한다.

• Journal of the Korean housing association
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• v.24 no.5
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• pp.1-8
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• 2013

Recently, as people have more interest in health, and some change takes place in their lifestyles, a demand for environment-friendly residential space is also increasing. Research on the introduction of natural elements is mostly conducted for humans to pursue a more pleasant and comfortable life in residential space since it has one of the closest relation with humans. Therefore, it is such an important assignment at present when environmental problems are considered significant. Based on such a necessity, this study analyzed the introduction types and characteristics of natural elements in residential space by considering essential and psychological aspects more than previous researches on residential space with practical and functional aspects. As natural elements, this study put limits on plants and water that are used a lot in the interior space, and by dividing introduction types into recomposition of courtyard space, spatial partition and decorative elements, this study carried out a case analysis of residential space structures recently completed in Japan. As a basic research on space planning that is desperately required by change in the residential life paradigm and on the basis of understanding about nature, it is expected that the results of this study will be used as design basic data useful when establishing plans of introducing natural elements for residential space in the future.

• Transactions of the Korean Society of Mechanical Engineers
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• v.9 no.4
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• pp.430-439
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• 1985

Conjugate natural convection in double enclosed annuli between horizontal concentric cylinders has been studied by the numerical analysis and experimental measurements. The interface conditions between the liquid and the solid of middle shell are obtained through the correlation factor based on the ratio of solid to fluid thermal conductivities and the Prandtl number. The characteristics of conjugate heat transfer are discussed under various dimensionless parameters such as conductivity ratios, shell thickness, diameter ratios, Prandtl number, and Rayleigh number. It is found that the average equivalent conductivity K over var $_{eq}$ does not depend on the conductivity ratios and shell thickness. The K over bar $_{eq}$ however, depends on the Prandtl number and the Rayleigh number.

• Journal of Engineering Education Research
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• v.11 no.4
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• pp.109-114
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• 2008

The purpose of this study was to investigate the relationship between self-leadership and teamwork in cooperative learning of capstone design. The results showed significant relationship between self-leadership and teamwork, with high self-leadership group obtaining higher teamwork scores than low self-leadership group. The results of stepwise analysis suggested that cognitive-oriented strategies, including cooperating more pleasant and enjoyable features into a given task, focusing on the task's inherently rewarding aspects, and focusing thoughts on positive aspects of the task, were the best predictors of overall teamwork. Therefore, it would be useful to provide the engineering students with the opportunities to develop their cognitive-oriented self-leadership strategies.

• Fire Science and Engineering
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• v.25 no.6
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• pp.44-50
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• 2011

Japan has a very advanced volunteer fire brigade system as an interdependent organization by local residents due to frequent natural disasters. Japan has fostered and developed the volunteer fire brigade in the national level to response rapidly and appropriately to earthquake or natural disasters even in the urban area that has sufficient fire stations and fire officers. This study analyzes the situation of operating the volunteer fire brigade in Japan in detail and compares the result with Korean situation. Finally, this study suggests policies which can be introduced to activate the volunteer fire brigade in Korea.

• Education of Primary School Mathematics
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• v.22 no.2
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• pp.113-127
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• 2019

The purpose of this study is to justify the fraction division algorithm in elementary mathematics by applying the definition of natural number division to fraction division. First, we studied the contents which need to be taken into consideration in teaching fraction division in elementary mathematics and suggested the criteria. Based on this research, we examined whether the previous methods which are used to derive the standard algorithm are appropriate for the course of introducing the fraction division. Next, we defined division in fraction and suggested the unit-circle partition model and the square partition model which can visualize the definition. Finally, we confirmed that the standard algorithm of fraction division in both partition and measurement is naturally derived through these models.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.32 no.4
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• pp.132-142
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• 2014

This study is the first stage to identify distinctive characteristics of American Romantic Garden compared to English Romantic Garden. The purpose of the study is to identify characteristics of transitional garden in the early period of America by analyzing of Paca garden, Mount Vernon and Monticello when English Naturalistic Garden was firstly imported. The analysis studied historical background, people who designed garden, formal garden and characteristics of natural garden through reference. Also based on data through reference and field research, spatial configuration and garden factors of each site were analyzed. In spatial configuration, straight line and curve line, formal terrace and natural slope, visible axis and invisible axis, symetric and asymmetric, and perspective and oblique perspectives were used as analyzing factors. As a result of analysis, each garden showed different type from that of formal gardens from colony period, which is natural garden of asymmetric garden(English natural garden) coexisted. Paca garden which planned formal garden and natural garden in each space showed characteristics of each space, but in formal garden residential axis and garden axis does not coincide which shows it is out of formal garden type. Such phenomena and the fact that naturalistic garden coexist in the same garden shows that the formal garden type from early days in US is starting to change in different types. Mount Vernon garden, similar to Paca garden, was designed to have two different types of gardens in harmony rather than divide the space into different space and design it. It adapted serpent walkway but shows symmetric by central axis and considered formalistic plan through same materials. However through terrace in hills and spatial plan of oblique perspective, one could observe that naturalistic type was beginning to settle in US gardens. Through Monticello analysis, space was designed with major characteristics of naturalistic garden which is serpent walkway, ornamental farm, winding flower bed grove and bush and oblique perspective, and it completely duplicates characteristics of naturalistic garden which could not be found in gardens imported from UK.