• 소성∙가공
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• 제9권4호
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• pp.348-355
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• 2000

The backward tracing scheme(BWT) of the finite element method has been extended lot the design of sheet blank in three-dimensional deformation. Originally the scheme was developed for preform design in bulk forming, and applied to several forming processes successfully. Its key concept is to trace backward from the final desirable configuration to an intermediate preform or initial blocker. A program for initial blank design in sheet forming which contains the capabilities of forward loading simulation by the finite element method and backward tracing simulation, has been developed and proved the effectiveness by applying to a square cup stamping process. In the blank design of square cup stamping, the backward tracing program can produce an optimum blank configuration which forms a sound net-shape cup product without machining after forming. For the confirmation of the analytic result derived from the backward tracing simulations as well as forward loading simulations, a series of experiment were carried out. The experiments include the first trial sheet forming process with a rectangular blank, an improved process with a modified blank preform and the final process with an optimum blank resulted from the backward tracing scheme. The experiments show that the backward tracing scheme has been implemented successfully in blank design of sheet metal forming.

• 한국가정과교육학회지
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• 제30권2호
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• pp.117-136
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• 2018

이 연구는 Wiggins와 McTighe(2011)의 2.0버전의 템플릿을 가정과 수업을 위한 템플릿으로 수정, 보완하여 재구조화하는 것을 목적으로 한다. 이를 위해 백워드 디자인의 주창자인 Wiggins와 McTighe의 이론을 고찰하고, Wiggins와 McTighe(2011)의 2.0버전의 템플릿을 고찰하였다. 또 백워드 디자인을 활용한 다양한 선행 연구를 분석하여 가정과 수업에 백워드 디자인을 적용하기 위한 템플릿 재구조화를 위한 시사점을 도출하였다. 또 전문가 협의회를 통한 안면타당도를 통해 템플릿의 타당도를 검증받았다. 이러한 과정을 거쳐, 1. 교육과정 분석, 2. 수업설계(학습경험 디자인↔평가설계), 3. 수업 흐름, 4. 각 차시별 수업 안내, 5. 평가기록 및 피드백의 총 5단계로 재구조화한 가정과 템플릿을 개발하였다. 이 연구에서 재구조화한 가정과 템플릿을 활용하여 2015 개정 교육과정의 가정과교육 영역의 수업 자료를 개발하여 학습자의 역량 함양에 기여하는 교수·학습의 개선이 지속적으로 확대되어 가야 할 것이다. 추후 연구에서는 백워드 디자인 적용의 가정과 수업이 학습자에게 어떤 영향을 미치는지에 대한 학교 현장 연구가 추진되어야 할 것이다.

• 한국비블리아학회지
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• 제22권3호
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• pp.5-24
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• 2011

각 교과의 교사들이 효과적으로 수업을 전개하기 위해서는 사전에 수업 전개 과정을 설계할 필요가 있다. 전통적으로 교수설계에 널리 적용되고 있는 모형으로는 딕과 케리, ADDIE, ASSURE 등이 있다. 그러나 전통적인 교수설계 모형은 교과 내용이 소규모 단원으로 분절되어 있어서 학생들이 교과의 본질적인 이해에 이르기 어렵다는 한계가 있다. 이러한 문제를 해결하기 위해서 위깅스와 멕타이는 백워드 설계 모형을 제안하였다. 백워드 설계 모형은 가르쳐야 할 내용과 활동을 결정하기 전에 먼저 평가를 고려하는 교수설계 방법이다. 이에 본 연구에서는 백워드 모형의 구조를 분석하고, 정보활용교육을 위한 '도서관과 정보생활' 교과에 백워드 설계 모형을 적용함으로써 정보활용교육의 효과적인 교수-학습 방법을 모색하고자한다. 본 연구에서는 '도서관 과 정보생활' 교과의 백워드 교수설계를 위해서 위깅스와 메타이가 고안한 템플릿을 적용하였다.

• 한국정밀공학회지
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• 제16권10호
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• pp.164-171
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• 1999

An optimum blank design technology is required for near-net of net-shape cold forming using sheets. Originally, the backward tracing scheme has been developed for preform design in bulk forming, and applied to several forming processes successfully. Its key concept is to trace backward from the final desirable configuration to an intermediate preform of initial blocker. A program for initial blank design in sheet forming which contains the capabilities of forward loading simulation by the finite element method and backward tracing simulation, has been developed and proved the effectiveness by applying to a square cup stamping process. In the blank design of square cup stamping, the backward tracing program can produce an optimum blank configuration which forms a sound net-shape cup product without machining after forming. Another general application appears in the blank design of a cup stamping with protruding flanges, one of typical automobile components. The blank configurations derived by backward tracing simulation have been confirmed by a series of loading simulations. The approach or decision of an initial blank configuration presented in this study will be a milestone in fields of sheet forming process design.

• 소성∙가공
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• 제6권5호
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• pp.408-415
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• 1997

The backward tracing scheme of the finite element analysis, which is counted to be unique and useful for process design in metal forming, has been developed and applied successfully in industry to several metal forming processes. Here the backward tracing scheme is implemented for process design of three-dimensional plastic deformation in metal forming, and it is applied to a precision coining process. The contact problem between the die and workpiece has been treated carefully during backward tracing simulation in three-dimensional deformation. The results confirm that the application of the developed program implemented with backward tracing scheme of the rigid plastic finite element leads to a reasonable initial piercing hole configuration. It is concluded that three-dimensional extension of the scheme appears to be successful for industrial applications.

• 한국CDE학회논문집
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• 제19권4호
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• pp.402-409
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• 2014

Presented in this paper is a scheduling method for semiconductor backend process considering the backward pegging. It is known that the pegging for frontend is a process of labeling WIP lots for target order which is specified by due date, quantity, and product specifications including customer information. As a result, it gives the release plan to meet the out target considering current WIP. However, the semiconductor backend process includes the multichip package and test operation for the product bin portion. Therefore, backward pegging method for frontend can't give the release plan for backend process in semiconductor. In this paper, we suggest backward pegging method considering the characteristics of multichip package and test operation in backend process. And we describe the backward pegging problem using the examples.

• Human Ecology Research
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• 제56권1호
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• pp.33-54
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• 2018

This study devised an instruction that applies the content factors of Family Life Planning to backward design by exploring the fundamental concepts of backward design and the structure of developing a systematic instruction. Furthermore, it was conducted to improve the developed instruction by examining its validity with the help of experts and to find the method of applying it to the curriculum. The lesson design of this study was as follows. 1) Making a unit outline, 2) Identifying the expected results (Shaping the objectives), 3) Deciding acceptable evidence (Planning evaluation), 4) Making a detailed blueprint for class tasks, 5) Planning learning experience, 6) Making a learning experience plan per time, 7) Checking the lesson design. Second, experts participated in this study for the internal validity test about the process of the systematic lesson development of Family Life Design based on a backward design. The results were shown to be valid because the average was 3.7 out of a perfect score 4 and the CVI of all was over 0.9. The result of the IRA was also score 1, meaning that most of the experts agreed on the results of the test. The details of the lesson design were clear at every stage and the tasks and the results of each stage were specific. This study included most of the necessary stages for a backward design.

• 한국정밀공학회지
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• 제18권10호
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• pp.76-83
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• 2001

This paper is concerned with the analysis of the forming characteristics of radial-backward extrusion. The single action pressing is analyzed by using the rigid-plastic FEM. The design factors such as die corner radius, gap height, and friction factor are involved in the simulation. The analysis is focused on the influences of the design factors on the maximum punch farce and metal flow into can and flange region. As a result of analysis, the gap height among the design factors is known to have a major effect on the metal flow of radial-backward extrusion for single action pressing compared with other design factors. As is expected, forming load and volume of flange increase as gap height and die corner radius increase, respectively.

• 정보교육학회논문지
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• 제19권4호
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• pp.409-418
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• 2015

본 연구의 목적은 백워드 설계 모형을 적용하여 초등학교 소프트웨어 교육 운영 지침의 '알고리즘과 프로그래밍' 단원의 교수학습계획을 개발함으로써, 백워드 설계 모형이 소프트웨어 교육과정 구성에 주는 시사점을 도출하는 것이다. 연구자는 Wiggins와 McTighe의 백워드 설계 탬플릿에 기초하여, '알고리즘과 프로그래밍' 단원의 교수설계를 개발하였다. 첫째, 교육부에서 제시한 소프트웨어 교육과정 운영 지침에 제시되어 있는 목표, 내용체계표, 성취기준, 단원목표 등을 확인함으로써, '알고리즘과 프로그래밍' 단원에 대한 영속적 이해, 포괄적이고 본질적인 질문, 핵심 지식과 핵심 기능을 도출하였다. 둘째, GRASPS 기법을 활용하여 '알고리즘과 프로그래밍' 단원의 수행 과제와 총체적인 루브릭을 개발하였다. 셋째, '알고리즘과 프로그래밍' 단원을 효과적으로 수업하기 위하여, WHERETO 요소의 14개 활동으로 구성된 7차시 수업을 개발하였다. 마지막으로, 백워드 설계 모형을 이용한 교육과정 구성이 소프트웨어 교육에 미치는 효용성에 대하여 고찰하였다. 백워드 설계 모형은 소프트웨어 교육을 위한 단원 및 수업 설계 개선에 많은 시사점을 제공할 것이라 기대한다.

• 한국군사과학기술학회지
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• 제6권1호
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• pp.68-80
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• 2003

The backward extrusion process of titanium alloy with large length to diameter ratio was simulated for different punch and die shape. The process variables such as initial billet shape, interface friction, contacting time and punch velocity were investigated and compared with experimental results. To make more effectively titanium alloy cup shape forging products with vertical wall, a modified die design which can reduce forging load, prevent sticking with punch and minimize material loss was suggested.