• Journal of the Korean earth science society
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• v.39 no.1
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• pp.103-116
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• 2018

The purpose of this study was to explore $6^{th}$ graders learning progression for lunar phase change focusing astronomical systems thinking. By analyzing the results of previous studies, we developed the constructed-response items, set up the hypothetical learning progressions, and developed the item analysis framework based on the hypothetical learning progressions. Before and after the instruction on the lunar phase change, we collected test data using the constructed-response items. The results of the assessment were used to validate the hypothetical learning progression. Through this, we were able to explore the learning progression of the earth-moon system in a bottom-up. As a result of the study, elementary students seemed to have difficulty in the transformation between the earth-based perspective and the space-based perspective. In addition, based on the elementary school students' learning progression on lunar phase change, we concluded that the concept of the lunar phase change was a bit difficult for elementary students to learn in elementary science curriculum.

• Journal of Korean Library and Information Science Society
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• v.39 no.3
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• pp.27-52
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• 2008

This paper tries to interpret the processes of small libraries changing sociological role and its direction of movement in Masan City. The roles of small libraries are changing according to the aspects of the communities. Thus the roles of the small libraries in Masan have also changed with the various changes in Korean society. The periods are divided into three : 1980's : the appearances of civil libraries, 1990's : maeul libraries that the citizens have established and participated, 2000's : small libraries that have established from cooperation of government and private. By the three periods this paper interprets the processes of small libraries changing sociological role and its direction of movement in Masan City.

• Journal of Educational Research in Mathematics
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• v.26 no.3
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• pp.333-354
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• 2016

The aim of the present study is twofold. One is to confirm a hypothesis that a student's rate concept influences her conceiving change of a function in the view of rate of change and the other is to build up foundations for understanding the transition process from her rate concept to the concept of rate of change when she investigates the change of concentration as an intensive quantity. We explored how three participating high school students recognized and expressed change of given functions by using their rate concept as a conceptual tool. The result indicates that a change in students' rate concept might have an effect on understanding how function values change in term of rate of change. We also expect that it could be a catalyst for further research for clarifying the relationship between students' rate concept and their development of a concept of rate of change as a foundation for learning calculus.

• Communications of the Korean Institute of Information Scientists and Engineers
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• v.30 no.12
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• pp.26-34
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• 2012

지금까지 간략히 살펴본 것처럼 심리학에서 연역추리를 연구하는 이론과 가정이 변화하고 있는데, 크게 네 가지 흐름으로 요약할 수 있다[2,6,7]. 가장 큰 변화는 연역 추리와 귀납 추리의 구분이 점차로 흐려지고 있다는 것이다. 두 번째 변화는 연역 추리를 이해하는 관점이 달라지고 있다는 점이다. 심리학에서 연역추리를 본격적으로 다루기 시작한 1960년대에는 사람들이 논리적인 사고를 하느냐에 관심이 모아졌다. 그러다 1980년대와 1990년대에는 연역추리를 하는 기제에 관한 심성 논리 이론과 심성 모형 이론 간의 논쟁이 치열하게 전개되면서 내용효과와 같은 실용적 요인들에 대한 연구도 많이 수행되었다. 그리고 1990년대 들어서면서 연역추리를 정보 획득의 관점에서 접근하는 확률적 접근, 연역 추리 과정을 heuristic 처리 단계와 분석적 처리 단계로 나누어 접근하는 이중 과정 이론이 등장하면서 기본적인 이론틀의 변화도 일어나고 있다. 세 번째 변화는 연역 추리를 문제 해결이나 의사결정과 같은 다른 인지 처리와 연결하려는 시도들이 진행되고 있다는 점이다. 마지막으로 심리학의 다른 분야에서와 마찬가지로 연역 추리에 관여하는 뇌 부위를 알아보는 뇌 영상 연구들이 점차 증가하고 있다. 이런 연구들의 결과로 연역 추리 과정에 대한 다차원적인 이해가 증진되고 다른 인지과정과도 연동되는 종합적 이해가 가능해질 것으로 예상한다.

• The Journal of Korean Association of Computer Education
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• v.19 no.5
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• pp.27-40
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• 2016

Changes in education or curriculum are based on the needs of the times and needs to address changes in knowledge. The purpose of this study was to provide implications regarding the general guidelines of the national curriculum by analyzing changes made in the high school informatics curriculum in which both needs are inherent. The study involved an analysis of the general guidelines to the national curriculum that involved the revision years 2007 and 2009, the composition of the 2015 revised curriculum, change in the status of the informatics curriculum, and the size of the informatics subject. As a result of the analysis it was found that several improvements are necessary, namely (1) the units need to be better clarified, (2) career electives need to be more appropriately composed, and (3) definitions of terms need to be better clarified. The significance of this study lies in the fact that it considered the viewpoint of software education emphasized in various countries around the world, and the general guidelines to the national curriculum were examined to learn what kind of organization and operation should be proposed for high school informatics.

• Korean Journal of Social Welfare Studies
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• v.41 no.3
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• pp.349-378
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• 2010

The Life-Course perspective is a theoretical orientation that views the life-course as the age structure embedded in social institutions and history and understands the life-course of individual and group in the contextual perspective. The life-course perspective studies were developed in Germany and North America. They study social and historical effects and the effect of institutions and the state on the life-course, the pathway of the work career and differences of labour outcomes, and the inequality that is developed in the life-course. In Korea, the life-course perspective studies were tried in various fields and cumulated. However, it didn't established as a theoretical orientation. For applying the life-course perspective to connect the individual life-course with social and historical event, I describe the historical location of individuals born between 1930 and 1979 and analyse the change of their transitions to adulthood exploratorily. On results, the extension of education made the structural change of their life-course, and in young cohort the timing of leaving school, entering workforce, marriage and childbirth was delayed and transitions were made in narrower spread. It means the standardization of the life-course as appears in modern society. The 1970s birth cohort has the differenciated life-course pattern, however I cannot verify that change because of the right censoring.

• Journal of Climate Change Research
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• v.6 no.3
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• pp.175-184
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• 2015

In this study GC and PAS were used to calculate $N_2O$ concentration of exhaust gas from Wood Chip combustion system. Fuel supplied to the incinerator was collected and analyzed and then the analysis result was used to calculate $N_2O$ emissions. Tier 3 and Tier 4 Method were used to calculate the $N_2O$ emissions. Plant's Specific emission factor of $N_2O$ by Tier 3 Method was 0.35 kg/TJ, while default emission factor of Wood?Wood Waste proposed by 2006 IPCC G/L was 4 kg/TJ. So the $N_2O$ emission factor of this study was 3.65 kg/TJ lower compared to the IPCC G/L. The total emissions calculated by Plant's specific emission factor was 4.22 kg during the measuring period, but by Tier 4 Method it was 7.88 kg. This difference in emissions was caused by the difference of continuous measuring and intermittent sampling. It would be necessary to apply continuous measuring to calculate emissions of $Non-CO_2$ gas whose the density distribution is relatively high. However currently, according to the target management guideline of greenhouse gas and energy, the continuous measuring method to calculate greenhouse gas emission is applied only to $CO_2$. Therefore for reliable greenhouse gas emission calculation it would be necessary to apply continuous measuring to calculate $Non-CO_2$ gas emission.

• Korean Journal of Childcare and Education
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• v.11 no.5
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• pp.91-111
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• 2015

The purpose of this study was to examine the effects of the field-work of growing rice on young children's scientific process skills. The participants were 10 three-year-old children in Y preschool in Osan. Teacher's participant observations, interviews with children, and children's observation journals were analyzed according to scientific process skills. This study showed that the experience of growing rice was effective in increasing children's scientific process skills. Children showed higher prediction, observation, classification, measurement, and communication ability as the activity session passed. This study can be used for the teaching methods of promoting children's scientific thinking and attitude.

• Journal of Gifted/Talented Education
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• v.25 no.4
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• pp.581-605
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• 2015

The purpose of this study is to build an instruction method focused on the mathematical process and apply it to 12, 5-year-olds from Kindergarten located in Seoul with a view to explore the changes in their mathematical thinking. In addition, surveys with parents and teachers, as well as those conducted in the field of early childhood education, were conducted to analyze the current situation. The effects focused on the five mathematical processes, namely problem solving, reasoning and proof, connecting, representing and communication was found to help the interactions between teacher-child and child-child stimulate the mathematical thinking of the children and induce changes. The mathematical process-focused instruction aimed to advance mathematical thinking internalized mathematical knowledge, presented an integrated problematic situation, and empathized the mathematical process, which enabled the children to solve the problem by working together with peers. As such, the mathematical thinking of the children was integrated and developed within the process of a positive change in the mathematical attitude in which mathematical knowledge is internalized through mathematical process.

• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.973-973
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• 2012

기후변화에의 대응을 위한 기회비용이 점차 커지고 있으며 이에 대한 적절한 대응의 확립은 곧 미래의 국가 경쟁력의 수립으로 이어질 수 있다. 이러한 대응은 기후변화 영향이 주는 시장실패를 최소화하며 주어진 조건하에서의 최적의 자원배분을 가능하게 하는 요건이라 하겠다. 기후변화의 영향이 미치는 자원배분의 효과를 고려하여 기후변화를 위한 예산의 적절한 확립이 필요할 수 있다. 극심한 기후변화의 진행과 더불어 물관리 재정은 그 규모의 증가가 요구되며 동시에 기후변화를 반영하는 구체적이고 새로운 체계를 요한다 하겠다. 그러나 이에 부응한 물관리 재정정책의 역할의 중요성에 비하여 기후변화를 위한 명확한 정책의 확립은 미흡한 현실이라 할 수 있다. 기후변화의 대응에 대한 비전과 전략의 확립이 물관리 재정에도 필요할 수 있으며 우리는 이전의 피상적인 부처별 예산배분의 정책에서 탈피하여 좀도 확고한 물관리 재정의 확립을 이룸이 필요하다 하겠다. 기후변화의 영향을 완화하고 또 그에 적응하고자 하는 제 정책의 결정과정은 현재의 수용력(capacity)을 변화시킬 수 있는 부존자원의 사용 여부와 직접적으로 연관되어 있음을 부인할 수 없다. 본 연구는 구체적인 예산의 활용방안에 관하여 기후변화 과정 속에서 적응하며 진화하는 물관리 재정의 형태 및 속성을 구분 점검한다. 나아가 우리의 지역별 유역별 시나리오의 변화의 과정 속에서의 기후변화대비 완화와 적응의 틀에서 정책적 조합의 모습을 진단한다. 현재의 예산 정책에 대한 확인으로 그 효과성을 점검하는 방법론의 제시 속에서 기후변화 대비 효과적인 재정정책은 지역별 사회경제시나리오와의 관계 속에서 확립됨을 보임으로써 정책제언이 가능함을 보인다.