• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 춘계 학술논문 발표대회
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• pp.256-257
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• 2019

Recently, the fire risk of architectural structures is increasing due to the super high - rise and super - size of the buildings. Therefore, the direction of fire safety design tends to change from the existing design to the performance - based design. In particular, domestic fire safety policies are divided into building law and fire fighting law. In case of fire fighting law, performance design is already carried out. Therefore, this study summarizes the prediction formula for fire characteristics among the structural fireproofing design field as shown in Fig. 1 according to this situation, and compares it with the standard method of each country in particular.

• Educational Technology International
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• 제7권1호
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• pp.81-98
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• 2006

The purpose of this study was to apply the ADDIE instructional design model to develop multimedia rich project-based learning methods for effective instruction in a Korean mechanical engineering high school. This study was conducted as action research based on a high school situation. The study included 40 participants in a class purposively selected from 52 classes at 2080 student high school. Data were collected through observations, surveys and artifacts. Results indicated the multimedia rich project-based learning allowed students to take part in learning activities and there was close cooperation with and among group members to create better products. Also, the flexibility in the project-based learning environment allowed the participants to make decisions about their abilities, resources, and plans. Recommendations and implications for teacher educators as well as in-service and pre-service teachers are also presented.

• Structural Engineering and Mechanics
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• 제50권3호
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• pp.305-322
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• 2014

Reliability-based design limit states and associated partial load factors provide a consistent level of design safety across bridge types and members. However, limit states in the current AASHTO LRFD have not been developed explicitly for the situation encountered by integral abutment bridges (IABs) that have unique boundary conditions and loads with inherent uncertainties. Therefore, new reliability-based limit states for IABs considering the variability of the abutment support conditions and thermal loading must be developed to achieve IAB designs that achieve the same safety level as other bridge designs. Prestressed concrete girder bridges are considered in this study and are subjected to concrete time-dependent effects (creep and shrinkage), backfill pressure, temperature fluctuation and temperature gradient. Based on the previously established database for bridge loads and resistances, reliability analyses are performed. The IAB limit states proposed herein are intended to supplement current AASHTO LRFD limit states as specified in AASHTO LRFD Table 3.4.1-1.

• Nuclear Engineering and Technology
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• 제41권3호
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• pp.247-270
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• 2009

This paper reviews studies on information searching behavior in process control systems and discusses some implications learned from previous studies for use in human factors studies on nuclear power plants (NPPs) main control rooms (MCRs). Information searching behavior in NPPs depends on expectancy, value, salience, and effort. The first quantitative scanning model developed by Senders for instrument panel monitoring considered bandwidth (change rate) of instruments as a determining factor in scanning behavior. Senders' model was subsequently elaborated by other researchers to account for value in addition to bandwidth. There is also another type of model based on the operator's situation awareness (SA) which has been developed for NPP application. In these SA-based models, situation-event relations or rules on system dynamics are considered the most significant factor forming expectancy. From the review of previous studies it is recommended that, for NPP application, (1) a set of symptomatic information sources including both changed and unchanged symptoms should be considered along with bandwidth as determining factors governing information searching (or visual sampling) behavior; (2) both data-driven monitoring and knowledge-driven monitoring should be considered and balanced in a systematic way; (3) sound models describing mechanisms of cognitive activities during information searching tasks should be developed so as to bridge studies on information searching behavior and design improvement in HMI; (4) the attention-situation awareness (A-SA) modeling approach should be recognized as a promising approach to be examined further; and (5) information displays should be expected to have totally different characteristics in advanced control rooms. Hence much attention should be devoted to information searching behavior including human-machine interface (HMI) design and human cognitive processes.

• 제어로봇시스템학회논문지
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• 제8권7호
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• pp.607-612
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• 2002

An automatic design method of behaviors in behavior-based robotics is proposed. With this method, a robot can design its behaviors by itself without aids of human designer. Automating design procedure of behaviors can make the human designer free from somewhat tedious endeavor that requires to predict all possible situations in which the robot will work and to design a suitable behavior for each situation. A simple reinforcement learning strategy is the main frame of this method and the key parameter of the learning process is significant change of reward value. A successful application to mobile robot navigation is reported too.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2007년도 정기 학술대회 논문집
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• pp.707-712
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• 2007

Recently, the rapid progress of Internet and Network affects engineering design environment as well as business fields to utilize Web technologies to enhance it's competitiveness in the world. This situation has also caused many companies to seek out the possibility to increase the collaboration between different organizations within their Product design process. Thus. this research shows the web based distributed design system framework which involves Workflow-based framework that enables to automate, integrate and manage the design process, such as CAD, CAE, Optimization tools.

• 한국철도학회논문집
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• 제10권3호
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• pp.306-312
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• 2007

This paper presents the optimal design method of the train repair facility based on the simulation analysis. The train is divided into the power car, motorized car and passenger car for the simulation process analysis and train repair facility is composed of each subsystems such as a blast, dry and wash workshop. In simulation analysis, we consider the critical (dependent) factors and design (independent) factors for the optimal design. Therefore, a simulation optimization uses Evolution Strategy (ES) in order to find the optimal design factors. Experimental results indicate that simulation design factors are sufficient to satisfy the conditions of dependent variables. The proposed analysis method demonstrates that simulation design factors determined by the simulation optimization are appropriate for real design factors in a real situation and the accuracy and confidence for the simulation results are increased.

• 한국비블리아학회지
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• 제28권4호
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• pp.321-340
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• 2017

본 연구는 국내 문헌정보학 수업에서 문제중심학습(Problem-Based Learning) 모형을 활용할 수 있는 수업 모형을 설계하였으며, 실제 강의실 현장에서 적용한 뒤 학생들이 느끼는 교육적 효과를 분석하였다. 본 연구는 기존 연구 분석을 통하여 문제해결 방안 초안을 작성하였다. 전문가의 자문을 통해 시나리오 수정하는 단계를 거쳤다. 문제는 분석단계활동(요구분석, PBL 수업적합성 판단, 내용분석, 학습자분석, 환경분석, PBL 운영환경 결정, PBL 수업형태 결정)과 설계단계활동(문제상황설계, 학습자원설계, 문제해결과정촉진설계, 운영전략설계, 평가설계, PBL 운영환경설계)을 통해 도출되었다. 초기 설정된 시나리오를 바탕으로 1차 문제상황 수업을 진행한 뒤 학습자들의 성찰일지를 통해 문제중심학습의 결과를 일차적으로 분석하였다. 학습자들의 성찰일지를 통해 연구자는 첫번째 PBL 문제상황에서 비판적 사고력과 창의력이 증진되었음을 확인할 수 있었으며, 원활한 의사소통과 협력의 방법이 고안/활용되었음을 알 수 있었다. 첫 번째 문제 상황 수업 후 교육 효과를 분석하고 수정사항을 수렴한 연구 결과는 교과설계의 2차 수정 및 보완에 활용할 예정이다. 본 연구는 PBL 모델 개발 사례를 소개하여 향후 후속 수업적용과 연구를 기대하게 한다.

• 한국지구과학회지
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• 제25권4호
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• pp.205-213
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• 2004

본 연구에서는 문제중심학습(Problem Based Learning)을 과학 수업에 적용하기 위한 지도전략과 '문제상황'을 설계하고 이를 적용한 후 학습자의 학습과정과 문제중심학습에 대한 인식을 밝히고자 하였다. 본 연구에서 적용한 문제중심학습의 단계는 문제상황 제시-문제 만나기-알고 있는 것과 알아야 할 것에 대한 확인(Know/Need to Know)-문제의 진술-정보의 수집과 공유-가능한 문제해결책 형성-최적 문제해결책 결정-문제해결책 발표이고, 소집단 토론 전략과 학습자 주도적 문제해결 전략 등의 단계별 지도전략을 설계하였다. '온실효과를 줄이기 위한 미래의 에너지로 무엇이 좋을까?'라는 문제상황으로, 과학고등학교 2학년 지구과학 수업시간에 문제중심학습을 실시하였고, 학습과정과 문제중심학습에 대한 인식을 밝혔다. 연구결과, 문제의 진술 단계에서는 초기에는 광범위한 문제 진술이 많았으나, 토론을 거듭할수록 문제해결책을 찾기 용이한 좁은 범위의 문제 진술로 정교화되었다. 그리고 K/NK단계에서 알고 있는 것과 알아야할 것에 대하여 명료하게 진술하는 활동이 해결책을 찾는 과정에서 학습자에게 가장 도움이 되는 활동으로 분석되었다. 소감문 분석결과 학습자들은 문제상황에서 문제를 찾아내는 과정을 가장 어려워하면서도 또한 흥미있는 활동으로 인식하는 것으로 나타났다. 이러한 연구 결과로부터, 내실있는 문제중심학습의 적용을 위하여, 다각도의 문제인식이 가능한 간학문적이고 현실적인 문제 상황의 개발이 우선되어야함을 알 수 있다.

• International Journal of Internet, Broadcasting and Communication
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• 제10권3호
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• pp.42-50
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• 2018

The majority of existing falling recognition techniques provide service by recognizing only that the falling occurred. However, it is important to recognize not only the occurrence of falling but also the situation before and after the falling, as well as the location of the falling. In this paper, we design and propose the falling notification service system to recognize and provide service. This system uses the acceleration sensor of the smartphone to recognize the occurrence of a falling and the situation before and after the falling. In order to check the location of falling, GPS sensor data is used in the Google Map API to map to the map. Also, a crosswalk map converted into grid-based coordinates based on the longitude and latitude of the crosswalk is stored, and the locations before and after falling are mapped. In order to reduce the connection speed and server overload for real-time data processing, fog computing and cloud computing are designed to be distributed processing.