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      • KCI등재후보

        초등학교 발명영재의 팀 문제해결 학습에서 문제의 구조화 정도에 따른 문제해결 과정 분석

        박수진,최유현 한국실과교육연구학회 2014 實科敎育硏究 Vol.20 No.1

        이 연구의 목적은 초등학교 발명영재가 구조화된 문제, 중간 구조화된 문제, 비구조화된 문제 등 문제의 구조 화 정도에 따른 팀 문제해결 학습에서 문제해결 과정이 어떻게 다른지 분석하여 규명하는 데 있다. 이 연구에 서는 초등학교 발명영재교육에서 학생들의 팀 내 상호작용을 촉진하고, 창의적으로 문제를 해결하는 능력을 기를 수 있는 수업 전략을 추출하고 문제의 구조화 정도에 따른 팀 문제해결 학습 모형(박수진, 2013)을 초등 학교 발명영재학급 수업에 적용하여 발명영재 학생들이 문제의 구조화 정도에 따라 문제를 해결하는 과정에 서 어떠한 차이가 있는지 분석하였다. 연구의 대상은 G 광역시 서부교육지원청 산하 G초등학교 발명영재 학급 5학년 학생 중 선발 과정에서의 팀 간에 입학 성적을 기준으로 동질한 3개 팀을 구성하여 12명을 최종 연구의 대상으로 선정하였다. 실험 설계는 문제의 구조화 정도에 따른 팀 문제해결 학습을 독립 변인으로 하여 일주일에 2시간 씩 6주간 총 12시간 동안 실시하여 촬영한 동영상 18개에서 초등학교 발명영재의 문제해결 과정을 분석하였다. 연구의 결과 첫째, 초등학교 발명영재는 팀 문제해결 학습에서 문제의 구조화 정도에 따라 문제 확인, 정보 수 집, 해결방안 탐색, 해결방안 선정, 구체적 계획, 실행(모형 제작), 평가 및 정리 중에서 정보 수집 단계와 모형 제작 단계에서 유의한 차이가 나타났다. 둘째, 초등학교 발명영재의 팀 문제해결 학습에서 구조화된 팀 문제 해결 학습(WS-TPSL)은 정보 수집 단계의 빈도는 낮은 편이나 특히 모형 제작단계에서는 그 빈도가 비구조화 된 팀 문제해결 학습(IS-TPSL)에 비해 높았다. 이는 발명영재학생들이 구조화된 팀 문제해결 학습(WS-TPSL) 는 문제해결을 위해 다양한 사고 활동을 하기 보다는 순서에 따라 모형을 제작하는 데 많은 시간을 보내고 고 차원 사고를 하기 보다는 제시된 정보를 확인하고 이에 따라 만드는 데 주된 활동을 하게 됨을 알 수 있다. This study was conducted to analyze elementary school aged inventive gifted students' problem solving process in regards to three levels of problem structuralization(well-structured team based problem solving learning, moderately-structured team based problem solving learning, and poorly -structured team based problem solving learning). To implement this study, three models of TPSL(team-based problem solving learning) based on the level of problem structuralization were used to encourage creative thinking and interaction between team members. This research analyzed how the problem solving process was different among the levels of problem structuralization; WS-TPSL, MS-TPSL and PS-TPSF. 12 fifth grade students in three same-leveled teams according to their test scores participated in the study. This program based on different levels of problem structuralization was implemented during a science camp for inventive gifted students at G elementary school for two hours a week over the course of six weeks(A total of 12 hours). After video recording the classes, the problem solving processes of the participants were analyzed by two qualified researchers. The results of this research show how students solve problems differently based on the structure level of team problems(WS-TPSL, MS-TPSL and PS-TPSF). The process of TPSL is as follows; defining a problem, collecting data, brainstorming problem solving strategies, Choosing a strategy, Creating a specific plan, Implementing the plan, evaluating the results and reflecting on the results. The following conclusions were formed from the result of this study. The process of data collection and implementation (making models) was significantly different among the three groups.

      • KCI등재후보

        문제의 구조화 정도에 따른 팀 문제해결 과정에서 초등학교 발명영재의 학습 활동 추이 분석

        박수진 한국실과교육연구학회 2015 實科敎育硏究 Vol.21 No.4

        이 연구의 목적은 초등학교 발명영재 학생들이 문제의 구조화 정도에 따라 팀 문제해결 과정에서 학습 활동 추이를 비교 분석하여 규명하는 데 있다. 연구의 대상은 G 광역시 산하 G 초등학교 발명영재 학급에서 발명영재교육을 받고 잇는 5학년 학생 중 입학 성적을 기준으로 동질 집단 3팀을 구성하여 12명을 최종 연구의 대상으로 선정하였다. 실험 설계는 문제의 구조화 정도에 따른 팀 문제해결 과정을 독립 변인으로 하여 일주일에 2시간 씩 6주간 총 12시간 동안 실시하여 촬영한 동영상 18종에서 초등학교 발명영재의 학습 활동 빈도를 통해 추이를 비교 분석하였다. 연구의 결과 초등학교 발명영재는 문제의 구조화 정도에 따라 팀 문제해결 과정에서 전체적으로 팀 문제해결학습에서는 모형 제작과 해결 방안을 탐색하는 활동 빈도가 높음을 알 수 있다. 또한 박수진, 최유현(2014)의 연구 결과에서 세부화하여 학습 활동 추이를 분석한 결과 정보 수집 과정 중에서도 정보를 검색하는 단계와 실행 과정 중에서 모형 제작 단계에서 차이를 보일 뿐만 아니라 문제를 이해하거나 구체적 설계와 결과 발표에서도 유의한 차이를 보였으며 문제의 구조화 정도가 구조화 될수록 같은 활동의 빈도가 집중되고, 비구조화 될수록 세분화 및 다양화되는 추이를 알 수 있었다. 이러한 결과를 토대로 제언하면 발명영재교육에서 다양한 학습 활동 경험과 다양한 사고를 지원하기 위해서는 문제의 구조화 정도를 비구조화 할 필요가 있음을 알 수 있다. 또한 추후 연구에서는 문제해결 과정 학습 활동별 빈도에 따른 추이를 분석한 연구를 기반으로 학습 활동별 소요 시간에 대한 분석이 이루어져야 할 것이다. The purpose of this study is to compare, analyze and to identify learning activity progress of elementary school prodigies of invention during team problem solving process depending on the structuralization level of problem(s). The target of the study are chosen among the fifth grade students who are receiving an education in prodigy of invention in G metropolitan city- affiliated G elementary school. Based on the grades at the time of entering the school, total of 12 students comprising 3 teams of identical groups were selected as the final target of the study. The experiment set team problem solving process depending on the structuralization level of problems as a single variable. The experiment ran for 2 hours per week for 6 weeks (total 12 hours) and filmed 18 video clips through which the progress through the frequency of learning activity of elementary school prodigies of invention was compared and analysed. The results revealed that the prodigies of invention tended to show higher activity frequency in building models and exploring solutions during the team problem solving process depending on the structuralization level of problems as well as in overall team problem solving learning experiences. Also, in the study results of Park Soojin and Choi Yoohyeon(2014), a subdivided analysis of learning activity progress revealed that the difference was shown in the information searching stage during the information collecting process and in the model building stage from the carrying out stage. A similar difference was shown in stages of problem understanding, specific planning and presentation of results. It was found that as the problems became more structuralized, the frequency of the same activities became more concentrated and as the problems became more de-structuralized, (the activities) became more subdivided and diversified. As the results of the foregoing, it can be concluded that in order for the education of prodigies of invention to support various learning activities and ways of thinking, there is need for de-structuralization of the level of problem(s). In addition, it is recommended that the future researches focus on analyzing the time taken per learning activity based on study(ies) that analyzed the progress depending on the frequency of learning activities of problem solving process.

      • KCI등재
      • KCI등재

        멜트스피닝과 포정반응에 의해 제조된 YBCO 초전도체의 미세조직

        박수진,김선화,박원욱,정형식 대한금속재료학회(대한금속학회) 1990 대한금속·재료학회지 Vol.28 No.4

        YBa₂Cu₃O_(7-x) Preform was melted and solidified into ribbon shape via melt spinning process. The as-spun ribbon contains melt-decomposed phases of rod shaped 211 phase aligned to spinning direction and Ba, Cu-rich matrix. Superconducting 123 phase is formed by a heat treatment through reaction between the 211 phase and the matrix. The grain morphology of the 123 phase is very much dependent of the presence of liquid phase during the heat treatment. The highly aligned large grain structure with strong (00ℓ) peak obtained through peritectic transformation indicates that the 123 phase is predominantly grown from the rod shaped 211 phase through reaction at the interface with the matrix. Heat treatment below peritectic transformation temperature yielded equiaxed type grain structure, indicating the random nucleation and growth of 123 phase. In case of a bulk specimen prepared by conventional powder consolidation technique, sintering above peritectic transformation temperature produced large grain structures but with random orientations. This strongly indicates that the presence of liquid phase can improve grain structure by promoting grain growth but is not effective for aligning the grains during the 123 phase formation.

      • KCI우수등재

        이관능성 에폭시/폴리술폰 블렌드의 경화거동 및 열안정성에 관한 연구

        박수진,김현철,박병기 한국섬유공학회 2000 한국섬유공학회지 Vol.37 No.4

        In this work, cure behavior and thermal stability of epoxy (EP)/polysulfone (PSF) blends were investigated using DSC and TGA. The 4,4'diaminodiphenyl sulfone (DDS) was used as a curing agent for epoxy resin and the content of EP/RSF was varied within 100/0∼100/40 phr. Cure activation energy ($E_{a}$) and conversion (α) were determined by dynamic and isothermal DSC. Based on the DSC results of EP/PSF blend system, $E_{a}$ increased with increasing PSF contents up to 30∼40 phr. However, the conversion decreased as the PSF content increased. From the TGA results of EP/PSF blends, the thermal stability based on initial decomposition temperature(IDT), integral procedural decomposition temperature(IPDT), and decomposition activation energy ($E_{t}$) were investigated. The thermal stabilities were increased by increasing the PSF content based on epoxy neat resin up to 30 phr of PSF. However, the presence of 40 phr PSF in the blend system led to a decrease in thermal stability, due to the immisciblity between EP and PSF.

      • KCI등재
      • KCI우수등재

        열잠재성 촉매를 사용한 에폭시 수지의 특성에 관한 연구 -촉매에서의 벤젠 치환기 영향-

        박수진,서민강,이재락,이덕래,이동진,최영국 한국섬유공학회 2000 한국섬유공학회지 Vol.37 No.3

        The effect of substituted benzene groups of cationic thermal latent catalysts i.e., N-benzylpyrazinium hexafluoroantimonate (BPH) and N-benzylquinoxalinium hexafluoroantimonate (BQH) on thermal, rheological and mechanical properties of the neat epoxy resin (diglycidyl ether of bisphenol-A, DGEBA) was studied in this work. Latent properties were studied by measuring the conversion as a function of curing temperature using a dynamic DSC analysis. The study of cure reaction, thermal behavior, and rheological properties on the neat epoxy resin initiated by both catalysts was investigated by means of DSC, TGA, and rheometer. And the mechanical properties were also determined by flexural and impact tests. As a result, the presence of the catalysts studied in this system appeared significantly to enhance the thermal properties. All results of thermal, rheological, and mechanical properties of DGEBA/BQH system were superior to those of DGEBA/BPH system. This was probably due to the presence of the bicyclic group which led to the ductile fracture properties, resulting in an increase in the resistance to the deformation and to the crack initiation of the epoxy system.

      • KCI우수등재

        에폭시/폴리우레탄 블렌드계의 강화 동력학 및 유변학적 특성에 관한 연구

        박수진,진중성,박병기 한국섬유공학회 2000 한국섬유공학회지 Vol.37 No.8

        The effects of composition ratios of epoxy resin (EP) and polyurethane (PU) blends on cure kinetics and reheological properties were investigated. In this work, 20 phr of DDM (4,4'- diamino diphenyl methane) was used as a curing agent for epoxy resin. And the composition of EP/PU was varied within 100/0∼100/40 phr. The cure activation energies ($E_{a}$), which were obtained from dynamic DSC data by Kissinger method, were increased in 40 phr of PU in EP than in pure EP. The rheological properties of blend system were investigated under isothermal condition using a rheometer. Crosslinking activation energies ($E_{c}$) were also determined from the Arrhenius equation based on gel time and curing temperature. As a result, both gelaton time and crosslinking activation energy increased with increasling the content of PU. These results could be explained by the increase in reactivity between the hydroxyl group in EP and isocyanate group in PU, resulting in an increase in the crosslinking density.

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