• Proceedings of the Korean Society of Computer Information Conference
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• 2019.07a
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• pp.203-204
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• 2019

본 연구의 목적은 예비 교사의 소프트웨어 교육 수업 전문성 함양을 위하여 백워드 설계 기반으로 교육프로그램을 개발하는 데 있다. 백워드 설계는 학생들의 심층적인 이해를 고려한 수업 설계 기법이다. 백워드 설계 대한 이론적 배경을 바탕으로 차시 당 4시간 수업으로 총 8차시(32시간 분량)의 소프트웨어 교육 프로그램을 개발하였다. 이는 예비교사의 소프트웨어 교육에 대한 심층적인 이해를 돕고, 직접 백워드 설계를 기반으로 하는 수업 계획을 실습함으로써 교육과정에 대한 깊은 이해도 도울 수 있다는 점에 의의를 갖는다. 하지만 본 연구에서 개발된 교육 프로그램이 어떤 효과성을 지니는지에 대한 검증이 이루어지지 않았다는 제한점이 있다. 따라서 추후 연구에서는 효과성을 확인하기 위한 실험 및 통계적 검증이 요구된다.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.20 no.7
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• pp.2118-2133
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• 1996

A preform is designed by the backward tracing scheme of the rigid-plastic finite element method(FEM) for net-shape shell nosing components without machining after forming. The current process of the shell nosing requires cost-consuming machining to produce final products. Here, the backward tracing scheme of the rigid-plastic FEM, a novel method for preform design of metal forming processes, derives a sound preform for net-shape shell nosing product. The current process is simulated by the rigid-plastic finite element analysis to check the metal flow involved in the forming with a trial preform and its modified preform. The two preforms are found to be inadequate for net-shape shell nosing product. The first application of the back ward tracing scheme derives a preform producing a not-shape shell nosing product. The first application of the backward tracing scheme derives a preform producing a net-shape product numerically, but it is difficult to be formed economically as a preform. Thus an improved preform is designed by the badkward tracing scheme, which is suitable for net-shape manufacturing of the shell nosing components in view of economy of production and forming characteristics of the product. The preform in the current process and a modified preform are confirmed by a series of experiments and the results give the same deformation with the numerical ones. Finally the newly designed preform by the FEM was experimentally proved to be adequate in obtaining net-shape products.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.27 no.5
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• pp.1129-1140
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• 2017

Unidirectional data transmission system, which allows physical one way transmission, removes the backward link physically to prevent the intrusion from the outside through the network. However, the system is difficult to apply to the environment requiring either backward transmissions or bi-directional communications. In this paper, we proposed Limited Two-way communications system, called as LimTway, which only allows outbound TCP two-way communications. LimTway uses two one-way links(forward, backward). While the forward one-way link is staying to be activated so that an allowed outbound UDP traffic could be transmitted one-way always, the backward one-way link is activated while allowed outbound TCP sessions are established. In order to prevent the intrusion from the outside during the period, the software of LimTway is designed to allow only the transmissions of both outbound TCP two-way communication traffics and outbound UDP traffics.

• Journal of Korean Home Economics Education Association
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• v.31 no.2
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• pp.155-175
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• 2019

This study aimed to present a concrete and systematic lesson design model for practical problem-based learning in Practical Arts based on the backward design model. To this purpose, this study was conducted in the following four stages: analysis, design, development, and evaluation. In the analysis stage, the literature related to the practical-problem-based curriculum and the instructional design model were reviewed as the theoretical foundations, and the 2015 revision of Practical Arts curriculum was analyzed. In the design stage, based on the literature review, the stages and sub-elements of practical-problem-based learning in Practical Arts were determined, and a template of instructional design was constructed. In the development stage, the design model was drafted based on the stages and sub-elements determined at the design stage. In the evaluation stage, the drafted design model from the development stage was evaluated, modified, and enhanced through expert verification. Based on the suggestions from the experts, the 'practical problem setting' stage was added to the original three-stage model, resulting in a model composed of the following four stages: practical problem setting, goal setting, evaluation planning, and learning activity planning. The experts appraised that the developed model of practical-problem-based instructional design in Practical Arts to be a systematic template that would serve as a concrete guideline for teachers who are trying to design classes based on practical problems.

• Journal of Intelligence and Information Systems
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• v.7 no.2
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• pp.129-141
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• 2001

Kansei engineering or image technology is a tool to analyze relation between product design components and the impression or feeling of human for physical products. This paper attempts to construct the designer\`s aid tool for developing corporate identity(CI) symbol mark based on the hybrid Kansei engineering. It combines the forward Kansei engineering for translating consumer\`s feeling into design components of CI symbol mark and the backward Kansei engineering for evaluating consumer\`s feeling for CI symbol mark. The semantic differential(SD) evaluation experiment is carried out to find the relations between image and design. The backward Kansei engineering system is modelled by fuzzy neural network. This research is expected to contribute to the development of CI symbol mark that correspond to comsumer\`s image.

• Journal of Korean Home Economics Education Association
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• v.31 no.3
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• pp.1-21
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• 2019

The purpose of this study is to develop a 'Healthy Couple Relationship' curriculum(plan) for high school home economics based on backward design. In this study, the content elements of 'Healthy Couple Relationship' were extracted through literature analysis, and the need for contents of 'Healthy Couple Relationship' was surveyed in 197 families of home economics teachers and 154 high school students. Based on this, the 'Healthy Couple Relationship' curriculum(plan) of high school home economics curriculum was developed as the backward design, and it was verified by the expert group. The results are as follows: First, when measured on a 5-point Likert scale, the mean scores of the need for content elements of 'Healthy Couple Relationship' was 4.39 for teachers, and 4.02 for students, respectively. The content elements of 'understanding dating violence' was 4.70 for teachers and 4.19 for students. Second, the developed 'Healthy Couple Relationship' curriculum consists of two templates, one for each unit, including curriculum goals, unit composition and unit goals, 8 learning subjects and content elements, evaluation plans including 24 lesson plans. In this study, it is meaningful to propose a "Healthy Couple Relationship" curriculum as an elective course in high school home economics curriculum in preparation for the high school credit system, and to lay the foundations for opening elective courses.

• Journal of Korean Home Economics Education Association
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• v.30 no.3
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• pp.175-193
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• 2018

The course of home economics education is the one that fosters the ability to solve life problems. The life problem is permanent involving the individual, family, and society in overall. Thus, this study was to compose a class which applied the backward design model suggested by Wiggins and McTighe focusing on the usability of it in the educational filed of the home science to overcome the limitation of the education in the filed based on that critical mind. Therefore, this study developed the teaching·learning plan applying the backward design model to the 'Food and Nutrition' unit of the home economics education. It is expected that the unit and the teaching plan are used as materials for the class on the dietary life unit which is meaningful for learners in the educational field of the home economics education.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2009.10a
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• pp.332-337
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• 2009

Recently, boss and rib test based on backward extrusion process was proposed to quantitative evaluate the interfacial friction condition in bulk forming process. In this test, the tube-shaped punch with hole pressurizes the workpiece so that the boss and rib are formed along the hole and outer surface of the punch. It was experimentally and numerically revealed that the height of boss is higher than that of the rib under the severe friction condition. This work is focused on the effect of the punch design and friction condition on deformation pattern in boss and rib test. From the boss and rib test simulations, it was found that there is slight variation in both the heights of boss and rib according to the length of punch land, nose radius, and face angle. However the hole diameter of the punch and the clearance between the punch and die have a significant influence on the heights of the boss and rib. In addition, the effect of flow stress was also investigated on the deformation patterns through FE simulations.

• Advances in biomechanics and applications
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• v.1 no.3
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• pp.143-158
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• 2014

Forearm fractures in children are very common among all pediatric fractures. However, biomechanical investigations on the pediatric forearm are rather scarce, partially due to the complex anatomy, closely situated, interrelated structures, highly dynamic movement patterns, and lack of appropriate tools. The purpose of this study is to develop a computational tool for child forearm investigation and characterize the mechanical responses of a backward fall using the computational model. A three-dimensional 10-year-old child forearm finite element (FE) model, which includes the ulna, radius, carpal bones, metacarpals, phalanges, cartilages and ligaments, was developed. The high-quality hexahedral FE meshes were created using a multi-block approach to ensure computational accuracy. The material properties of the FE model were obtained by scaling reported adult experimental data. The design of computational experiments was performed to investigate material sensitivity and the effects of relevant parameters in backward fall. Numerical results provided a spectrum of child forearm responses with various effective masses and forearm angles. In addition, a conceptual L-shape wrist guard design was simulated and found to be able to reduce child distal radius fracture.

• Transactions of Materials Processing
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• v.18 no.8
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• pp.640-645
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• 2009

Recently, boss and rib test based on backward extrusion process was proposed to quantitatively evaluate the interfacial friction condition in bulk forming process. In this test, the tube-shaped punch with hole pressurizes the workpiece so that the boss and rib are formed along the hole and outer surface of the punch. It was experimentally and numerically revealed that the height of boss is higher than that of the rib under the severe friction condition. This work is focused on the effect of the punch design and flow stress on deformation pattern in boss and rib test. From the boss and rib test simulations, it was found that there is slight variation in both the heights of boss and rib according to the length of punch land, nose radius, and face angle. However the hole diameter of the punch and the clearance between the punch and die have a significant influence on the calibration curves showing the heights of the boss and rib. In addition, the effect of flow stress on the calibration curves was investigated through FE simulations. It was found that there is no effect of strength coefficient of the workpiece on the calibration curves for estimation of friction condition. On the other hand, the strain-hardening exponent of the workpiece has a significant influence on the calibration curve.