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기술적 문제해결력 향상을 위한 TRIZ 기반 교수 모형 개발
김창현(Changhyun Kim),박수홍(Suhong Park),배진호(Jinho Bai) 한국문화융합학회 2023 문화와 융합 Vol.45 No.10
이 연구의 목적은 중학교 기술 교과를 중심으로 학생들의 기술적 문제해결력 향상을 위하여 TRIZ를 기반으로 한 교수 모형을 개발하는 것이다. 연구의 목적을 달성하기 위해 Richey와 Klein(2012)의 개발연구 방법론을 적용하여 분석→설계→개발(초안 도출)→평가→분석→최종안 개발의 절차로 연구를 진행하였다. 모형을 도출하기 위하여 문헌 연구를 통해 교수 모형의 핵심 가치, 핵심 활동 프로세스, 지원요소를 도출하여 초안을 구안하고 기존 TRIZ 40가지 원리를 축약하여 기술적 문제해결 도구인STEP-ABC를 개발하였다. 모형의 내용 타당도를 확보하기 위하여 삼각 검증법에 기반한 구성원 검토, 교육공학과 TRIZ 전문가로 구성된 전문가 FGI, 현직 교사 대상 설문하였다. 전문가 형성평가의 내용을종합하여 모형 초안을 수정·보완하기 위하여 현장 전문가인 현직 교사를 대상으로 설문조사를 실시하고문헌 연구를 보충하여 핵심 가치와 핵심 프로세스를 수정하여 최종 모형을 도출하였다. The purpose of this study is to develop an instructional model based on TRIZ to improve students' technological problem-solving competency in context of middle school technology subject. To achieve the purpose of the study, it was conducted as follows: analysis → design → development(drafting) → evaluation → analysis → finalization based on Richey and Klein(2012)'s development research method. To derive the model, it derived the core values, core activity processes, and supporting elements of the model through literature research, drafted the model, and developed STEP-ABC. To secure the content validity, it conducted member checking, expert formative evaluation FGI consisting of educational technology and TRIZ experts based on triangulation. In order to synthesize the feedback received through the evaluation and revise and supplement the draft model, it conducted a survey of in-service teachers as SME and supplemented the literature study to revise the core values and core activity processes to make them more intuitive, and derived the final model.
김창현(Changhyun Kim),한상명(Sangmyung Han) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The duration of vehicle aging mode for the certification is required to be shorter in order to reduce the vehicle development time. And the durability prediction of emission control components, especially O₂ sensor and catalytic converter is getting more important as emission regulation is stricter and vehicle durability mileage are extended<br/> Real road condition and driving pattern must be reflected into development stage to meet regulation at high mileage. In order to get the frequent driving pattern of vehicle, a vehicle had been tested by changing drivers and driving roads. Real road driving patterns around Seoul were analyzed and compared to those of certification mode<br/>
김창현(Changhyun Kim),이강수(Kangsoo Lee),박재인(Jaein Park),백제현(Jehyun Baek) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Diesel engine injector is used for spraying the fuel into the cylinder chamber. Complex phenomenon like cavitation occurs from small scale of injector nozzle and high pressurized fast flow field. Flow inside the nozzle affects whole engine performance including combustion and exhaust process, therefore understanding the flow inside the injector nozzle is very important. In the injector, the needle moves in vertical direction and controls the injection. Flow field inside the nozzle and nozzle outlet characteristics will be varied from the position of the needle. Because of small nozzle size and complex flow field, experimental approach is difficult. In this study, by using commercial code and mesh deformation technique, unsteady flow inside the nozzle and nozzle outlet characteristics can be analyzed. As a result, the complex flow field is placed inside the nozzle and especially, cavitation occurs at the upper side of nozzle inlet from the pressure drop below the vapor pressure. The characteristics at nozzle inside and outlet are varied as needle moves up and down. Subsequent processes, combustion and exhaust, can be predicted accurately by using the way discussed in this paper and to conclude, whole engine performance can be predicted and improved.