• The Journal of the Acoustical Society of Korea
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• 제22권3E호
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• pp.133-140
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• 2003

A time series simulation is presented by a ray approach for the simulating the received waveform of a broadband acoustical signals interacting with the ocean boundaries. The environment is assumed to be horizontally stratified, and the seafloor is described in terms of homogeneous fluid half-space. The ray approach includes the effects of reflection from the air-water, water-sediment interface and phase shifts due to boundaries interaction. To generate time series, we assume that the acoustic energy propagates from source to receiver along eigenrays and represent the action of the bottom on the incident wave by a linear filter and characterized in the frequency domain by the transfer function. As example application, the time series for an explosive source in a shallow water environment is calculated and analyzed in terms of acoustical process. good agreement with measured time series is demonstrated.

• East Asian mathematical journal
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• 제39권2호
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• pp.251-270
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• 2023

This study examined what questions posed, and for arranging the matters, what decisions made, what practices put into by elementary preservice teachers during his or her enacting and reflecting mathematics teaching. Analysis of the study focused on the mathematics instructions practiced by four participants in practicum for senior students. Their own questions raised by each one in the instructional designs, performances, and reflections were picked out and categorized by five dimensions of mathematics instruction; the nature of classroom tasks, the role of the teacher, the social culture of the classroom, mathematical tools as learning supports, and equity and accessibility. Their instructional decision-makings and action-takings for answering to these questions were analised.

• East Asian mathematical journal
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• 제36권2호
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• pp.317-330
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• 2020

The purpose of this action research project was to study the effects of incorporating coding into the middle school math classroom affected student dispositions with math and their understanding of mathematical concepts. The project, involving a total of 107 US middle school students, used five data sources to examine these effects: a survey, a chart measuring student engagement, a pre- and post-assessment before and after the coding project, and teacher observation with reflection forms. After analyzing the data, it was found that incorporating coding into the middle school math classroom could have a positive impact on student math dispositions and their understanding of math concepts.

• 대한지구과학교육학회지
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• 제14권2호
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• pp.159-172
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• 2021

이 연구는 온라인 과학 수업에서 실험 활동과 상호작용의 개선을 위한 수업 전략을 계획하고 그 결과를 바탕으로 개선 방안을 제시한 실행연구이다. 이를 위해 2020년 7월7일부터 9월 9일까지 G광역시에 위치한 초등학교 6학년 학생 20명을 대상으로 '지구와 달' 단원 수업을 실행하였다. 수업을 위해 실험 활동 범주에서 스마트 기기와 대체 실험, 상호작용 범주에서 온라인 대화방과 질의응답 전략을 계획하였다. 수집한 자료 중 수업 활동지, 과제물, 성찰 일지, 온라인 대화 내용, 질의응답 내용을 주요 자료로 하여 매트릭스에 입력하고 분석적 텍스트를 작성하여 그 의미를 분석하였다. 실행 결과 스마트 기기와 대체 실험은 탐구의 기회를 제공하였으나 오개념 형성에 대한 위험이 있었고 실험 활동을 방해하기도 하였다. 온라인 대화방과 질의응답은 소통의 기회와 과학 개념의 점검과 피드백 기회를 제공하였다. 본 실행연구를 통해 연구자는 수업 반성 노트를 작성하며 수업을 반성할 수 있었고, 과학 수업의 효과성과 효율성 측면에서 스마트 기기의 역할을 제안하였다.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제10권2호
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• pp.77-110
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• 2007

This study attempted to investigate how to students show high-level mathematical thinking in math classes. This paper describes how to setup the task for lead to a high - level of thinking out students and what efforts are required while a teacher tried to maintaining students's high-level cognition during the tasks implemented. The researcher as teacher analyzed the tasks of length measurement unit in 2-Ga elementary math textbooks, modified and created math tasks demanded students' high-level cognition, made instruction plans, and implemented those tasks maintaining the levels of cognitive demand of tasks. After that, the researcher reflected and analyzed the levels of cognitive demand of tasks of instruction and factors that cause to change intended high-level cognitive demand. After reflection, second roof of action research was conducted to 2-Na length measurement unit. This paper includes those results and reflections of practitioner.

• 시스템엔지니어링학술지
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• 제18권1호
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• pp.46-57
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• 2022

In this paper, we proposed the DFMEA Implementation Method for safety design of Weapon System. First, we presented the process for DFMEA. And then, the case analysis of OOO missile was performed in accordance with the process presented. After defining the system requirements of OOO missile, failure definition scoring criteria was set. In order to clarify the definition of failure, the failure was classified into safety, reliability, maintainability and others. After performing the function analysis, the relationship matrix analysis was performed to identify the failure mode according to the function without omission. After clarifying the failure classification, mode of failure, cause of failure and effect were analyzed to calculate the severity, occurrence and detection values. After the action priority was judged, the recommended action according to the failure classification was identified for the determined action priority. The results of this study can be used as a relevant basis for the design reflection and resource re-allocation of stakeholders.

• 벤처창업연구
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• 제11권2호
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• pp.89-100
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• 2016

본 연구는 사회 혁신분야의 문제해결도구로 활용 비중이 커지고 있는 디자인 씽킹과 액션러닝 방법론을 비교분석하고 통합모델을 제시하는데 목적이 있다. 구체적으로 두 방법론의 프로세스 측면에서 유사점과 차이점을 비교, 분석하고, 두 방법론의 장점을 기반으로 통합된 방법론을 제시하고자 한다. 비교 분석 연구를 통해 제시된 통합모델은 디자인 씽킹 방법론의 완성도를 높이기 위하여 액션러닝의 팀빌딩과 성찰 프로세스 부분을 중점적으로 보완하였다. 또한 통합모델을 검증하기 위한 사례 연구를 통해 디자인 씽킹 방법만을 활용하는 경우보다 액션러닝이 가미된 통합모델이 더욱 우수한 성과 도출이 가능하다는 것을 통계적으로 검증하였다. 본 연구결과는 사회혁신 도구로 활용할 수 있는 디자인 씽킹과 액션러닝 방법론을 이해하는데 기여할 수 있으며, 두 방법론을 기반으로 수정된 통합모형을 제시함으로써 디자인 씽킹을 이용한 사회 혁신 전략의 질적 수준과 만족도를 향상시킬 수 있을 것이다.

• 한국환경보건학회지
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• 제48권2호
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• pp.123-129
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• 2022

Background: The Environmental Health Action Program was a national project carried out from 2012~2021. It was aimed at developing public technologies to protect people's health from various environmental hazards. Objectives: One of the final goals of the project was "creating health benefits worth more than 179.2 billion won by reducing the environmental burden of disease." This study aims to evaluate whether the program sufficiently achieved the planned benefits. Methods: In order to secure consistency in evaluation, we applied the same equation used in the goal-setting process. It is comprised of six parameters to estimate the benefit: 1. The amount of medical expenses for environmental diseases; 2. The attributable proportion of environmental risk factors' 3. The rate of reduction in medical expenses for environmental diseases; 4. R&D project contribution; 5. The proportion of successful policy reflection; and 6. The contributions of the project. The corresponding variables were estimated at the end of the project, and the health benefits of the project were recalculated using the newly estimated variables. Results: It was estimated that a total of 195 billion won in health benefits occurred or will occur from 2015 to 2026. The main contributors for achieving the target were an increase in medical expenses for environmental diseases, a high score in the R&D project contribution, and the proportion of successful policy reflection. Conclusions: Technically, the equation used in the project is about medical expenses for environmental diseases rather than about the environmental burden of disease. There are several benefits of using the environmental burden of disease in the evaluation of public health policies. In further studies, developing a policy evaluation framework using indicators such as population attributable fraction would be needed.

• 과학교육연구지
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• 제47권2호
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• pp.139-153
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• 2023

본 연구는 액션러닝을 활용한 환경교육 프로그램이 초등학생의 환경소양 및 자기효능감에 미치는 영향을 알아보고자 하였다. 이를 위해 부산광역시에 있는 A 초등학교 6학년 학생 22명을 대상으로 액션러닝을 활용한 환경교육 프로그램을 적용하였다. 본 연구의 결과는 다음과 같다. 첫째, 액션러닝을 활용한 환경교육 프로그램은 초등학생의 환경소양 향상에 효과적이었다. 액션러닝을 활용한 환경교육 프로그램 실시 후 학생들의 환경태도와 가치, 감수성이 긍정적으로 변화했고, 환경 쟁점 의식 및 생태적 지식이 향상되었으며, 환경친화적 행동과 환경 기능 면에서도 유의미한 상승이 있었다. 둘째, 액션러닝을 활용한 환경교육 프로그램은 초등학생의 자기효능감 신장에 효과적이었다. 액션러닝을 활용한 환경교육 프로그램 실시 후 학생들은 문제 해결에 대한 자신감, 자신이 해야 할 행동을 판단하는 능력이 향상되었다. 셋째, 액션러닝을 활용한 환경교육 프로그램을 실시할 때 초등학생들은 기존 수업보다 적극적인 참여와 흥미를 보였다. 학생들은 자신들이 직접 문제를 찾고, 해결 방법을 구상하며 이를 직접 실천해볼 때 환경 보호에 대한 의지가 커졌다. 성찰 후에는 해결 방법을 심화시켜 자신이 사용하지 않는 물건을 팔아보고, 수익을 환경보호 단체에 기부하는 활동으로 이어지면서 학생들의 수업 몰입도와 만족도가 높았음을 확인할 수 있었다.

• 수산해양교육연구
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• 제29권3호
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• pp.677-688
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• 2017

The purpose of this study is to analyze the action learning lesson about the improvement process of the job support program of P university students. As a research method, we applied the related classes during the semester to the students who took courses in the course of 'Human Resource Development', which is a subject of P university, and analyzed the learner's reflection journal, interview data. As a result of the research, we went through the problem selection stage, the team construction and the team building stage. And then we searched for the root cause of the problem, clarified the problem, derived the possible solution, determined the priority and created the action plan. There are 10 solutions to the practical problems of poor job camps. Through two interviews with field experts it offered final solutions focused on promoting employment and Camp students participate in the management of post-employment into six camps. According to the first rank, job board integration, vendor selection upon student feedback, reflecting improved late questionnaire, public relations utilizing KakaoTalk, recruiting additional selection criteria, the camp provides recorded images in order. The results of this study suggest that the university's employment support program will strengthen the competitiveness of students' employment and become the basic data for the customized employment support program.