• Title/Summary/Keyword: Situation-based Design

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Design of Control Logics for Improving Vehicle Dynamic Stability (차량 안정성 향상을 위한 제어기 설계)

  • 허승진;박기홍;이경수;나혁민;백인호
    • Transactions of the Korean Society of Automotive Engineers
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    • v.8 no.5
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    • pp.165-172
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    • 2000
  • The VDC(Vehicle Dynamic Control) is a control system whose target is to improve stability of a vehicle under lateral motion. A lateral vehicle motion, especially on a slippery road, can lead to a hazardous situation, and the situation can even worsen by the driver`s inappropriate response. In this paper, two VDC systems, a fuzzy-based controller and an LQR-based controller have been developed. The controllers take as input the yaw rate and the sideslip angle of either body or rear wheel, and they yield the direct yaw moment signal by which the vehicle can gain stability during cornering. Simulations have been conducted to evaluate the performance of the control system. The results indicated that the controllers can successfully improve vehicle stability under potentially dangerous driving conditions.

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Simulation of Container Leading/Unloading Operation Using Simulation Based Design Methodology (시뮬레이션 기반의 설계기법을 이용한 컨테이너 적.양하 시뮬레이션)

  • 김홍태;이순섭;이종갑;장동식
    • Journal of the Korea Society for Simulation
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    • v.10 no.2
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    • pp.33-46
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    • 2001
  • Recently, the usage of containers in marine transportation is rapidly increasing. The problem of ship stability is important because of its direct influence to the loss of the human-life, ship, and merchandise. However, the assessment for ship stability during container loading/unloading in port is dependent on human experience only. On the other hand, the emerging information and communication technologies of shipbuilding industrial environments are rapidly changing. To respond to the situation, a new paradigm has been matured with new concepts such as the concrete method. Especially, all the efforts are shown to be concentrated to realize the concept of Simulation Based Design(SBD) based on three dimensional Computer Aided Design(CAD) model. In this paper, ship model-based simulation methodology for design and operation of ship is suggested, and for the verification of suggested methodology, the system for stability assessment of ship during container loading/unloading was developed using ENVISION, a general-purpose simulation system. The developed system consists of geometric modeling subsystem, basic calculation subsystem, and Computer Aided Engineering(CAE) subsystem. In addition, interface to CAE/CAD /simulation system such as SIKOB and ENVISION is provided.

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Operation Situation of Academic Credit Bank System for Academic Degree of Cosmetology & Academic Research Trends

  • Lee, Youngjae;Lee, Woonhyun
    • Journal of Fashion Business
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    • v.19 no.6
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    • pp.74-81
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    • 2015
  • The purpose of this study is to analyze the operation situation & academic research trends in Seoul and Gyeonggi area, based on theoretical consideration on academic credit bank system, focusing on academic credit bank system where a lifelong education institute affiliated with a university produces graduates with associate's degree. To find out about how academic credit bank institutes are operated in cosmetology field, the analysis of literature review was used, in reference to the literatures as well as administrative data from the Ministry of Education and institutes for lifelong education with respect to academic credit bank system. Further, dissertations and articles in journals were also reviewed for analysis, in order to see academic research trends with respect to academic credit bank system in cosmetology, and finally to provide the directions for a follow-up study in the future. It was found that about 120 junior colleges have cosmetology departments, while only about 20 4-year universities have them, where lifelong education systems such as lifelong education are essential for learners to have bachelor's degree to go to a graduate school in reality. Every year more people want to learn and acquire the degree through a lifelong education institute affiliated with a university. In this regard, it is thought that there should be first positive social awareness towards a degree recipient from such educations and more administrative promotion and active engagement of government, businesses and schools, in order to vitalize academic credit bank system. Meanwhile, there are only about 10 academic literatures including the dissertations on the operation of academic credit bank system with respect to cosmetology, which is not sufficient number in academic research, compared to the increasing number of people who want to acquire the degree. Most of the preceding studies have been limited to education services and learners' satisfaction level. Therefore, continuous follow-up study is required on how to improve social awareness as well as teachers and instructors' satisfaction level, as well as how to develop industry-customized curriculum, in order to ensure active academic credit bank system.

Accessibility Situation of Pedestrian Environment Buildings in College Campus from Manual Wheelchair Users' Perspective and Accessibility Map Development - Focused on a Case of University-C - (자주식 휠체어 사용자 관점의 캠퍼스 보행환경과 건물 접근성 실태 및 접근성 맵 제작 - C대학교 사례를 중심으로 -)

  • So-Hee, Moon;Ga-Ram, Han;Hyun-Jeong, Lee
    • Journal of the Korean housing association
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    • v.28 no.2
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    • pp.23-33
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    • 2017
  • This study was aimed to assess accessibility situation of pedestrian environment of University-C focusing on accessibility of manual wheelchair users and to develop accessibility campus map. During March and April 2016, barrierfree design application situation of pedestrian environment and building entrances were investigated using a structured checklist and a digital distance and slope meter. Major findings are as follow. (1) Except one case, widths of all pedestrian routes (both sidewalk and non-sidewalk routes) exceeded 2 meters. (2) As for sidewalk and driveway contact point condition, there were many spots lacking curb ramp or alterative ramp that are accessible for manual wheelchair users. (3) More than half of non-sidewalk pedestrian routes did not have bollard to separate pedestrian and vehicle flows, and more than 92% of the bollards installed were too close for wheelchair users to pass or too far to prevent vehicle access. (4) More than 59 percent of the building entrances were found impossible for manual wheelchair users to access without any assistance, and one third of the buildings did not have any single accessible entrance. Based on the study findings, campus accessibility map was developed by the researchers and disseminated through university homepage. Using the campus accessibility map, users can plan their accessible paths ahead the trip.

Defining Essence and Research Scope of Design Marketing (디자인마케팅의 본질과 연구영역에 관한 연구)

  • Lee, Jin-Ryeol
    • Science of Emotion and Sensibility
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    • v.9 no.spc3
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    • pp.197-208
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    • 2006
  • Modern corporations are changing their strategies from 4P-based marketing strategies which have been used for logic-based consumers in the past to perception-based marketing strategies which will be performed for current emotion-based consumers. Therefore, the importance of emotional marketing, which means the integrated strategies approaching consumers by combining logic-based marketing strategies and emotion-based design strategies, has been increased. However, existing researches have not tried to suggest the essence and research scope of design marketing and verify the applicability of each research sectors but only tried to apply some marketing tools in design process. Regarding this, this study suggests that the essence of design marketing has to be defined first then various and systematic academic reviews have been performed on each research sectors of it before design marketing tools are applied in design practices. In addition, this study suggests 3 research categories of design marketing based on traditional marketing. They are first, understanding consumer's decision making precess for design and next, introducing and applying various research tools ant last, applying various strategic tools for strategy-making based on situation understanding. Finally, this study suggests future research directions on 3 research categories mentioned above.

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Design of A Group Cooperating Model Based on Intention Hierarchy (의도계층을 이용한 그룹간 상호 협력 모델의 설계)

  • Jang, Young-Cheol;Lee, Chang-Hoon
    • The Transactions of the Korea Information Processing Society
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    • v.5 no.6
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    • pp.1575-1582
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    • 1998
  • In this paper. we design and evaluate a cooperating model that increase problem solving ability by selecting proper cooperating partners under changing situation. In this model, to decide cooperation direction and extent, we have used a payoff function and then divided the group into two parts, cooperation part and non-cooperation part. To control these reconfigured groups at group level, group intention is used as a control media instead of existing data and goal. Group intention is abstractive and comprehensive and represents collection of strategies. Group intention is changed based on resources, information, and cooperation situation on group intention hierarchy. Two layered control is possible : first constraint with group intentions(group level) and then select a strategy under the constraint. These approaches are tested and evaluated on pursuit game testbed.

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The Causality of Empowerment on Job Crafting: Focus on the Moderating Variable of LMX (임파워먼트와 잡 크래프팅의 인과구조: 조절변수를 중심으로)

  • Jung, Young-deuk;Yu, Byung-Nam
    • Journal of the Korea Safety Management & Science
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    • v.23 no.4
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    • pp.135-146
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    • 2021
  • It is getting more intensified with the competition among participating companies for global market share in major industrial fields. The situation is accelerating especially within the top 5 market share, and these include electric vehicles, semiconductors, chemicals, and shipbuilding industries. The key to the advantage over the competition within a strategic group is which company leads the innovation in the field. On-the-ground innovation refers to job-based innovation. This paper aims to analyze job unit innovation in the structure of empowerment, LMX, and job crafting. Existing studies on job crafting have suggested a causal structure based on job design in the traditional sense, and there are not many scholars who study the causal structure using a job situational model. Therefore, this paper takes an approach from the perspective of the job situation. As a result of the study, LMX showed a moderating effect on the relationship between autonomy provision and job crafting. While, in the relationship between meaing-giving and cognitive crafting, there is no significant moderating effect shown on the relationship between autonomy provision and cognitive crafting. Therefore, the results of the analysis in this study suggest that the meaning of jobs and participation in decision-making should be managed in an integrated way in structural and design areas, not just qualitative factors such as empowerment and leadership.

A Fundamental Study on the Application of Performance-Based Construction Standard in Building Construction (건축분야에서의 성능중심 건설기준 적용 방안에 관한 기초적 연구 - 시방서를 중심으로 -)

  • Roh, Tae-Im;Kim, Sang-Heon;Ji, Suk-Won;Choi, Soo-Kyung;Seo, Chee-Ho
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2008.05a
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    • pp.187-191
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    • 2008
  • This study focuses on applying performance-based design to construction standard in building construction. First, it realizes situation and issues of standard specification in building construction, deduces the need factors for establishing performance-based construction standard, and then, it proposes the application of performance standard. The required stages for deducing performance-based construction standard consist of dividing building parts, deducing required functions, performance items and performance requirement and deciding a method of performance evaluation. Through these stages, performance-based design process is deduced.

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A Study on Design Criteria for Web-based Library Instruction Program (웹 기반 도서관 이용자교육 프로그램의 설계기준에 관한 연구)

  • Shin, Kyoung-Hun;Choi, Sang-Ki
    • Journal of the Korean Society for information Management
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    • v.21 no.3
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    • pp.161-183
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    • 2004
  • Recently. Web-based library instruction is incomplete in domestic situation. The purpose of this study is to present the design criteria of web-based library instruction programs. This study draws elements of synthetic criteria that are analyzed by evaluation criteria of web site and web-based library instruction, and compares and analyzes web-based library instruction programs.

Effects of Problem Based Learning on Critical Thinking Disposition and Problem Solving Process of Nursing Students (문제중심학습이 간호학생의 비판적 사고성향과 문제해결과정에 미치는 효과)

  • Yang, Jin-Ju
    • Journal of Korean Academy of Nursing Administration
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    • v.12 no.2
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    • pp.287-294
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    • 2006
  • Purpose: The purpose of this study was to identify the change of critical thinking disposition and problem solving process in students who experienced problem-based learning. Method: This research design was one group pre-post test design. Twenty-five nursing students who participated in ‘'Nursing Process' course with two PBL packages for a semester in 2004 were the subjects of this study. The data were analyzed by repeated measures of ANOVA, and content analysis. Result: The problem defining in problem solving process was improved significantly, but there was no significant difference in the critical thinking disposition. Conclusion: The results of this study suggest that PBL has a positive effect on nursing students' problem solving process, But for a more significant effect on a continuous base for critical thinking of nursing students, faculties should use web based and simulation-based education for self directed learning along with clinical situation-based scenarios.

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