• Proceedings of the Computational Structural Engineering Institute Conference
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• 2010.04a
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• pp.322-325
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• 2010

철강 플랜트 주요 설비인 전로를 지지하는 장치의 접합부 강도설계를 위해 작용하중은 해석적인 방법으로 신뢰성 있게 계산하였고, 정적하중에 의한 응력은 ASME 규정에 따른 허용응력으로 평가하였다. 한편 피로설계 측면에서는 전로와 같은 대형 용접구조물은 강도상 취약부인 용접부에서 다양한 용접비드 형상에 따라 국부응력이 크게 달라지므로 설계단계에서 피로수명 평가에 어려움이 있었다. 따라서 전로 지지장치 접합부 피로설계는 설계단계에서 피로수명을 평가하는 실용적이고 안전측 방법으로 알려진 Hot Spot 응력을 사용하고 공신력을 갖는 설계규정인 ASME와 영국 PD 5500 절차에 의해 평가하였다. 평가결과 두 규정 모두 안전측에서 평가되는 것을 확인할 수 있었고 이 방법은 피로하중이 지배적인 대형구조물의 설계단계에서 유용한 방법으로 활용할 수 있으리라 판단된다.

• Journal of KIISE:Software and Applications
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• v.32 no.5
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• pp.438-448
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• 2005

This paper proposes an adaptive tutoring system that provides learning materials dynamically according to the learners' teaming character and ability. Our system, in which a learning phase and a test phase are linked together, supports the personalized instruction-learning by providing the teaming materials by level in the learning phase according to the teaming ability estimated in the test phase. We design and implement a tutoring system consisted of an evaluation component and a learning component. An evaluation component uses a computerized adaptive test(CAT) based on item response theory to evaluate learners' ability while a learning component employs fuzzy level set theory so that teaming contents are provided to learners according to learners' level.

• Journal of Korea Water Resources Association
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• v.46 no.6
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• pp.585-596
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• 2013

The objective of this study is to evaluate the hybrid downscaling method combined Step-Wise Scaling (SWS) method with Regional Climate Model (RCM) simulation data for climate change impact study on hydrology area. The SWS method is divided by 3 categories (extreme event, dry event and the others). The extreme events, wet-dry days and the others are corrected by using regression method, quantile mapping method, mean & variance scaling method. The application and evaluation of SWS method with 3 existing and popular statistical techniques (linear scaling method, quantile mapping method and weather generator method) were performed at the 61 weather stations. At the results, the accuracy of corrected simulation data by using SWS are higher than existing 3 statistical techniques. It is expected that the usability of SWS method will grow up on climate change study when the use of RCM simulation data are increasing.

• Proceedings of the Korea Society for Simulation Conference
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• 2001.05a
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• pp.8-13
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• 2001

다 단계 의사결정지원시스템, AHP(Analytic Hierarchy Process)는 다수 대안에 대하여 다 면적인 평가기준과 다수 주체에 의한 의사결정을 위해 설계된 의사결정지원방법의 하나이다. AHP 시스템은 먼저 주어진 시스템을 구성하고있는 요소를 세분하고 그 분할된 요소를 계층적으로 구성하며 다음으로 계층간 각 레벨에 있는 요소의 상대적 중요도에 대한 판단을 종합하는 과정을 거친다. 본 연구에서는 이러한 AHP방법을 실용화하기 위하여 사용자가 Web기반에서 활용하기 쉽도록 GUI-tyre 프로그램을 개발하고 이를 검증하였으며 예제를 들어 보였다. 본 연구에서 개발한 소프트웨어는 크게 다음과 같이 3 가지 구조로 구성하였다. 단계 1 : 대안 평가의 아이디어 창출 단계(Brainstorming), 단계 2 : 다 단계, 다 기준 의사결정지원시스템(AHP), 단계 3 우선 순위 종합모델(MRM)

• Journal of the Korean Society for Library and Information Science
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• v.44 no.4
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• pp.303-331
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• 2010

With the full execution of the Comprehensive Library Advancement Plan(2009~2013), related bodies and participants, including national administrative agencies and local government, are increasing and the policy environments are intricately being expanded as well. However, there has been insufficient research on the general aspects of library policies to analyze and evaluate the current circumstances. The objective of this study is to analyze both the problems and suggestions in the areas that need improvements implementing this comprehensive plan. Accordingly, we designed a formative model for evaluating the policy process relating to the comprehensive plan, and then modified and supplemented the developed plan based on the Delphi method utilized by library policy experts. We conducted an empirical evaluation of library policy officials who have established and implemented the comprehensive plan. We then used the evaluation results to assess the effects of the factors regarding the accomplishments reached each policy stage.

• The Transactions of the Korea Information Processing Society
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• v.4 no.7
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• pp.1719-1732
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• 1997

In the software development process, various development product are made in each phase of lifecycle. Formless software is visualized by products, and quality management is implemented by management for products. But, because standardization for products which is made in the development process is not established practically, developers use different development methodologies or documentation specifications. Therefore the reality is that quality evaluation is not implemented along standardized methodology or systematic process. In this paper, we constructed quality management system and designed and implemented analysis phase quality evaluation toolkit. We constructed quality external and internal character to evaluate software quality for quality management and constructed relational metrics and system of qualitative quantitative evaluation element items and, under these systems, we constructed quality evaluation toolkit and Implemented functions and evaluated products.

• Journal of Korean Society of Environmental Engineers
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• v.28 no.5
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• pp.494-500
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• 2006

Life Cycle Assessment(LCA) is an environmental assessment tool for evaluating environmental burdens associated with products, processes and activities from the raw material acquisition stage to the end-of-life stage. End-of-life stage as well as other processes requires a reliant database in order to increase the confidence in the LCA results. In this study, the flow of Personal Computer(as PC) in the end-of-life stage was examined and the database of two scenarios has been established, i.e. one is part reuse and the other is no part reuse, in the end-of-life phase of PC. Also, key environmental issues were identified by carrying out LCA on a PC in the end-of-life phase for eight environmental impact categories. The 'ozone layer depletion' contributes the highest environmental impact due to generation of $Cl_2$ gas during the incineration of waste plastics. In addition, the scenario 1(part reuse) is more environmentally sound than the scenario 2(no part reuse) when comparing two scenarios.

• 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 Dental Rehabilitation and Applied Science
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• v.35 no.1
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• pp.11-19
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• 2019

Purpose: This study evaluated the usability of and satisfaction with two types of computer-aided design (CAD) software among users who had experience with dental implant CAD software and those who did not. Materials and Methods: Dental technicians (n = 20) who had previous experience with dental implant CAD Software and students from the College of Dentistry (n = 12) who had never designed implant custom abutments were asked to evaluate two types of CAD Software, Exocad and Deltanine. In addition, the participants were asked to fill out a structured questionnaire (Section 1: Entering basic information and retrieving files; Section 2: Setting conditions before abutment design; Section 3: Setting abutment design; and Section 4: Overall satisfaction). For the statistical analysis of the collected data, Mann-Whitney U test was used (${\alpha}=.05$). Results: The ease of design and satisfaction with the implant CAD Software, evaluated with respect to 21 statements divided into four Stages, were significantly higher for Exocad in both groups for Secion 1. For Sections 2 and 3, participants with experience evaluated Deltanine to be significantly better. For Section 4, both groups evaluated Exocad Software to be better. Conclusion: Overall, the Exocad Software was evaluated as having better usability and offering greater satisfaction. However, in terms of performance in the core of the design process, i.e. Sections 2 and 3, Deltanine was rated higher by the experienced users. Thus, if the user interface design parts are supplemented, Deltanine CAD Software could be put to a wider use in clinics.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04b
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• pp.373-375
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• 2004

오늘날 소프트웨어의 발전이 급격히 진보됨에 따라 소프트웨어 시스템의 품질에 대한 요구가 증가하고 있다 특히. 완성된 시스템이 품질에 대한 요구를 만족시키는 시스템인지의 여부를 결정하는 아키텍처의 평가가 매우 중요하다 그러나 평가 과정에서 아키텍처에 대한 부적절하거나 모호한 표현으로 인해 광범위한 응용에서는 많은 제약이 따른다. 그러므로 본 논문에서는 소프트웨어 아키텍처를 평가하기 위해 준비하고, 실행하고. 완료하는 세 가지 단계 제시한다. 이들 단계를 수행함에 따라 품질 속성의 획득에 많은 영향을 주는 아키텍처의 설계 결정을 중심으로 체계적인 아키텍처 평가가 이루어질 수 있다.