• 한국과학교육학회지
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• 제40권3호
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• pp.237-251
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• 2020

인류가 직면한 지구온난화와 같은 기후 변화에 대한 이슈는 우리의 삶에 직접적인 영향을 미치는 매우 중요한 문제로 이를 극복하기 위해서는 탄소 순환에 대한 통합적 이해를 바탕으로 대기 중 이산화탄소 등의 온실기체 방출량 감축이 필수적이다. 이 연구의 목적은 탄소 순환 교육에 대한 국내외 연구동향을 분석하여, 미래 시민으로 성장할 학생들을 위한 탄소 순환 교육의 가치와 방향을 제시하는데 있다. 이를 위해 '탄소 순환 교육'과 관련하여 국내외 다양한 학술연구 데이터베이스 (RISS, KCI, Google 학술검색, ERIC 등)에서 수집된 52편의 연구들을 대상으로 분석하였다. 그 결과, 탄소 순환 교육을 위해 많은 연구들이 다양한 형태로 이루어져 왔으나, 개발된 프로그램의 낮은 활용 가능성과 검증의 필요성, 정밀하고 일괄적인 학생인식과 수준 조사 도구 개발의 필요성, 교수·학습 모형과 교사를 대상으로 한 관련 연구의 필요성, 교사의 탄소 순환 교육을 위한 자료의 필요성, 그리고 다양한 주제와 소재의 활용이 필요한 것으로 확인되었다. 지구온난화를 포함한 지구 환경 변화에 능동적으로 대처하기 위해서는 학생들의 탄소 순환에 대한 통합적인 이해가 중요하다. 이러한 학습 기회를 지원하기 위해 기존에 개발된 프로그램의 검증을 바탕으로 교육 현장에서 활용할 수 있도록 제공하고, 학생들의 탄소 순환에 대한 이해 수준을 높이고 오개념을 개선할 수 있도록 생활속에서 적용할 수 있는 실질적인 형태의 내용을 교육과정에 포함할 필요가 있다. 또한 교사의 전문성 향상을 위해 다양한 소재와 주제를 포함하는 탄소 순환 교육 사례에 대해 교사 연수를 통해 제공되어야 할 것이다.

• 무역상무연구
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• 제46권
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• pp.265-313
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• 2010

Kyoto Protocol is an international convention on concrete performance program for UNFCCC(United Nations Framework Convention on Climate Change), which regulate and prevent to global warming and officially came into effect on February 16, 2005. Kyoto flexible mechanisms, the agreed environmental system in March 1997 in the Third Conference of Parties in UNFCCC General Assembly, Emission Trading System(ETS), Clean Development Mechanism(CDM) and Joint Implementation(JI), are key policies related to environment. In advanced countries, greenhouse gas emissions should be reduced average 5.2% level compared to 1990 in total emissions during 2008-2012. World leading carbon market finished the trial on the EU ETS I greenhouse gas emissions trading system, EU ETS II is operated regularly after 2008. World Bank leads to make 'Prototype Carbon Fund(PCF)' in April 2004, which is the world first carbon fund and a representative public carbon fund type, World Bank operate various funds including present PCF. Thus, I would like to propose as follows in relation to this study: First, in the validity analysis of carbon funds, it would be needed to analyze the Emission Reduction Cost Efficiency(ERCE) of carbon. The ERCE is a break-even value which brings the Net Present Value(NPV) to zero. NPV approach is used among projects and it enables potential projects to be compared and evaluated the ERCE on the basis of the net present value of net future cash flows. Therefore, according to results of analysis, carbon funds should be developed and invested. Second, it would be necessary to allow of issuing bonds together with carbon funds, carbon finance etc. Third, carbon funds, it would be reasonable to have a relatively enough maturity in project and as a financial derivatives in the international financial markets, it is needed various types of transactions. Fourth, it would be needed to standardize the carbon emissions trading for more efficiently. Fifth, it would be necessary to establish and invest in various kinds of domestic and overseas global carbon funds, including governments, privates, governments and privates sectors. And it is also needed to establish the medium and long term plans for carbon funds. Sixth, it would be needed to foster the advanced trade mechanisms for carbon funds in the most effective ways. Finally, carbon funds should be used in harmony with international societies to reduce global warming as the social responsible investing funds and it should be contribute to sustainable development. In addition, it would seem that carbon funds should be studied on establishing the contributable standard of sustainable development in the future assignment.

• 한국지구과학회지
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• 제38권1호
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• pp.91-104
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• 2017

이 연구의 목적은 과학 글쓰기를 통해 고등학생의 지구 시스템에 대한 이해와 시스템 사고 과정을 분석하는 것이다. 글쓰기 활동에 활용한 자료는 지구과학 I 교과 내용 중 지구환경 변화에 관련된 3가지 주제(지구 온난화, 화산분출, 사막화)이며 이와 관련된 과제를 개발하였다. 개발한 자료는 고등학교 2학년 학생 8명을 대상으로 투입하였으며 작성한 과학 글쓰기 내용을 바탕으로 DAET-C 체크리스트와 지구 시스템에 관련된 개념을 구성요소로 하여 인과지도를 작성한 후, 이를 근거로 하여 시스템 사고의 관점에서 분석하였다. 그 결과로 첫째, 학생들은 지구 시스템의 구성, 지구 시스템의 상호작용, 지구과학적 소양, 시스템 순으로 지구 시스템을 이해하는 것으로 조사되었다. 둘째, 학생들의 과학 글쓰기 내용을 바탕으로 각각의 주제별로 인과지도를 작성한 결과 피드백 순환 고리가 나타난 학생은 연구에 참여한 8명 중 지구 온난화 관련 주제에서는 4명, 화산 분출 관련 주제에서는 1명, 사막화 관련 주제에서는 4명의 학생이 지구 시스템에서 하위 요소 간의 상호작용을 고려하는 시스템 사고를 하고 있는 것으로 조사되었다. 결론적으로 연구에 참여한 학생들은 지구환경 변화가 지구계 하위 요소 사이의 상호작용을 통해 복잡한 과정 속에서 복합적으로 이루어지고 있다는 사고를 하고 있었으나, 지구 시스템의 순환에 대한 과정에서 시스템 사고는 미흡한 것으로 나타났다. 과학 글쓰기 활동을 활용하여 지구 시스템 교육과 시스템 사고를 향상 시킬 수 있는 다양한 연구가 필요할 것이다.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2008년도 추계학술발표대회 논문집
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• pp.63-68
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• 2008

Efforts tp overcome the current challenge of global warming and abnormal temperature are being taken around the world. According to a report, average temperature of Korea has increased by about $0.8^{\circ}C$ for a century. In particular, temperature has rapidly increased since year 2000. Climate changes have brought remarkable changes in our lives. For example, agricultural field will see changes in crops and production. Energy used to maintain and manage architectures will be changed as well. In order to actively cope with rapidly changing global climate which drives changes from the basic behavior of our lives to subtle changes, international cooperation and researches are performed around the word. For instance, as a part of these global efforts, research on typical meterological data for computer simulation program to evaluate architecture energy performance is in progress in Korea. In order to conduct research on typical meterological data in format of data per time, reference regarding monthly maximum/minimum temperature time is required. Unfortunately, however, reference regarding maximum/minimum temperature time hasn't been defined in Korea. Therefore, this study aims to provide fundamental data essential for various researches by calculating maximum/minimum temperature time of major cities across Korea. According to the study, maximum temperature occurs at 3 p.m and minimum temperature occurs at 5 a.m or 6 a.m. respectively, in overall areas.

• 한국소음진동공학회논문집
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• 제22권9호
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• pp.825-829
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• 2012

The global warming caused the changes of our environment like an increasing tropical night phenomenon in the middle latitude areas. Especially, in Korea, the habitats of tropical Korean blockish cicada have changed from Jeju island located in Southern part of Korea to the whole of Korea because of the increasingly warming weather. The cicadas crying sound have been social problem because the tropical Korean blockish cicadas cry at middle of the night owing to the various outdoor lights. The cicada is positive phototaxis insect. So, the cicada is not cry at night. But if the outdoor light is very bright, then the cicada confuse the night as a day and start to cry. As a result, the cicadas crying noise has caused the resident living in downtown to an unpleasure and sleeplessness. In this research, we have measured three kinds of cicada singing noise at 16 points of urban area(Incheon, Gwangju, Busan, Gyeonggido Anyang). And then we analyzed the sound quality of the three kinds of cicada singing noise using by CADA-X signal process program. And we analyzed the acoustical characteristics by STFT(short time Fourier transform) which is a time-frequency analysis method. The characteristics of the cicada singing noise in terms of the sound quality and the time-frequency variation will be usefull to discover the relations between the human annoyance about the cicada singing noise and the acoustical characteristics.

• 한국해양학회지:바다
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• 제12권2호
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• pp.57-60
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• 2007

우리나라에서 연어(Oncorhynchus keta) 에 대한 관심은 1980년대 양양내수면연구소가 설치된 이후에 크게 증가하였다. 그 이후 연어방류사업이 점차 확대되어 최근에는 한반도의 18 개 하천에서 연어가 방류되고 있다. 하지만 아직 연어에 대한 충분한 연구 투자가 선행되지 않아, 연어에 대한 생태학적 이해는 부족한 편이다. 특히 지구환경은 지난 수십 년 동안 급격히 바뀌었고, 연어 개체군의 생물학적 특성도 변화하는 환경의 영향을 받아왔다. 연어 분포의 남방한계선에 있는 우리나라의 연어는 기후 및 해양의 변화에 민감하게 반응할 것이므로, 향후의 환경 변화를 주시해야 할 필요가 있다. 본 특별호에서는 북태평양에서 연어가 차지하는 수산생태학적 위치를 개괄하였고, 현재 우리나라에서 수행 중인 연어 연구의 결과를 요약하였다. 본 특별호가 우리나라 연어 연구의 방향을 제시하는 계기가 되기를 바란다.

• Advances in concrete construction
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• 제10권4호
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• pp.311-317
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• 2020

Performance of Sustainable materials continues through using of recycled waste construction materials to minimize the utilization of the natural resources. The cement industry is a major source of CO₂ in the atmosphere which is the main cause of global warming. Replacement of OPC with other sustainable cementitious materials has been the most interesting area of researches. This investigation focuses on the properties of alkali-activated mortar with the different replacement ratios of ceramic tile powder (CTP) by fine soil powder (FSP) (0 to 100)% and different molarities of sodium hydroxide concentrations. The experimental program was conducted by examining the compressive strength, water absorption, and water sorptivity. The results showed that the compressive strength of the specimens at age of (28, 56, and 90 days) increases with an increase in the amount of fine soil powder content and decreases at the age of 120 days. Also, minimum water absorption at the age of 90 days was found in the mixes containing 100% fine soil powder. However, fine soil powder replacement had a negative effect on the sorptivity and water absorption values at the age of 120 days. On the other hand, the 12M sodium hydroxide concentration was considered the optimum concentration compared to other concentrations.

• KIEAE Journal
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• 제12권2호
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• pp.111-116
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• 2012

Faced with the international issue of environmental problems from global warming and energy consumption, the Korean Government has made many efforts on reducing energy and $CO_2$ emission under the motto of "Low-Carbon Green Growth". In order to reduce energy in the building sector, severe design standards and regulations on saving energy in new buildings have been established. Now, it is necessary to focus on deteriorated buildings where applications of energy saving designs and techniques have been insufficient, for maximizing energy saving in the building sector. Specially, it is very important to reduce energy through the remodeling process at deteriorated school buildings which were built over 20 years ago and sharply changed into the excessive energy consumption structure from new educational curricula. Thus, this paper examined the effects of potential factors to reduce energy at deteriorated elementary school buildings using the energy simulation on the Visual DOE 4.0 program. Among applied factors of insulations, southern louver, window's SHGC, indoor setup temperature, and system efficiency, all factors except window's SHGC turned out contribute to reduce energy at the deteriorated elementary school buildings, compared with the baseline energy performance.

• KIEAE Journal
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• 제13권5호
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• pp.97-102
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• 2013

Many countries over the world have acknowledged the global warming problem by greenhouse gas emission and tried to solve the problem. The Korean government has also taken many actions such as The Act on Low Carbon, Green Growth and on Promoting Green Building in that architectural building section takes 1/4 of national greenhouse gas emission. Under the situation that buildings constructed 15 years ago when insulation standards were reinforced take about 74%, The Plan on Vitalizing Green Remodeling, finally established on July 2013, will induce energy-efficient remodeling of deteriorated buildings. Using the energy simulation by the Visual DOE 4.0 program, this paper proposed the ways of energy-efficient remodeling of deteriorated high school buildings by measuring energy saving performance of factors that were drawn from the previous study. The factors considered are insulation, window's SHGC, south louver, system efficiency, and indoor setting temperature. Among them, all factors except SHGC proved contribution to reducing energy use at deteriorated high school buildings, compared with the baseline energy consumption.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 춘계학술대회 논문집
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• pp.434-439
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• 2005

In order to prevent the global warming, Korea has had a ratification to the Kyoto Protocol which is specified the air pollution level should be lower the condition of the year 1990 until the year 2012, in hence the traffic system produced mostly the air pollution has been faced to big change. According to the reinforcement of higher level for environmental condition, alternative way to the conventional traffic system is required, so that is fuel cell technology of commercialized R&D program used by hydrogen fuel, and further for the optimized high energy efficiency it has been considered the advanced development of traffic system used the conventional railroad system. But it is moreover expected the huge amount of initial investment, so at the current, next new traffic system is needed. This study is for the improvement of urban traffic system in domestic which should be seriously changed for environmental friendly through the reduction of air pollution by fuel gases of vehicle and human convenience to be easily approached. In hence it is proposed the development of superior high efficiency-'Fuel-cell Rubber-tired Tram' system manufactured by the composite car-body.