• 제목/요약/키워드: path-following strategy

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장애물회피소나 빔 모델링 기반의 국부경로제어 기법 연구 (Study on Local Path Control Method based on Beam Modeling of Obstacle Avoidance Sonar)

  • 김현식
    • 한국지능시스템학회논문지
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    • 제22권2호
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    • pp.218-224
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    • 2012
  • 최근에는, 초소형 AUV(Autonomous Underwater Vehicle)의 개발에 대한 요구가 증가하고 있으므로 그 요소 기술의 확보가 시급하다. 요소 기술의 하나로서 국부경로제어의 기존 연구에서는 주로 전방감시소나(Forward Looking Sonar : FLS)의 정보를 활용하고 있는데, FLS의 크기는 초소형 AUV에 적합하지 않으므로 장애물회피소나(Obstacle Avoidance Sonar : OAS)를 이용하는 것이 바람직하다. 요약하면, 초소형 AUV를 위한 OAS 기반의 국부경로제어 시스템은 다음과 같은 문제점들을 가지고 있다. 즉, OAS는 낮은 방위(bearing) 분해능 및 지역적인 거리(range) 정보를 제공하며, 임무시간을 증대하기 위해서 에너지 소비가 적은 시스템을 필요로 한다. 나아가, 구조 및 파라메터 관점에서 용이한 설계 절차를 요구한다. 이 문제를 해결하기 위해서 OAS 빔 모델링을 기반으로 진화 전략(Evolution Strategy : ES) 및 퍼지논리 제어기(Fuzzy Logic Controller : FLC)를 이용하는 지능형 국부경로제어 기법이 제안되었다. 제안된 기법의 성능을 검증하고 특성을 분석하기 위해서 수중비행체(Underwater Flight Vehicle : UFV)의 수평면 침로(course) 제어가 수행되었다. 시뮬레이션 결과는 제안된 기법에 있어서 실제 적용의 가능성과 추가 연구의 필요성을 보여준다.

공정성 조절효과에 따른 서비스 실패 관련 변인들 간의 관계구조분석 - 공정성 조절효과를 중심으로 - (Analysis of the Relational Structure among Service Failure-related Variables after Moderation of Fairness - Focusing on fairness-related -)

  • 김성아;유태순
    • 복식
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    • 제64권3호
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    • pp.13-31
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    • 2014
  • This study attempts to analyze relational structures among service failure-related variables after the moderation of fairness in the beauty service industry with the following purposes: First, it aims to review and investigate service failure & service recovery strategies, non-switching intentions after recovery, revisit intention, the intent to provide word-of-mouth recommendations and previous studies on service failure and recovery in the beauty service industry. Second, it targets the analysis of the role of fairness as a variable that moderates relations between service recovery strategies and post-recovery satisfaction in the beauty service industry. For this, the following research method was used: This study has investigated the effect of service failure and its recovery strategies (behavioral recovery strategy, psychological recovery strategy, monetary recovery strategy) on customer satisfaction for beauty service users and used the Structural Equation Model (SEM) to further analyze and verify the effect of the satisfaction on post-satisfaction behavior (non-switching intention, repurchase intention and the intent to provide word-of-mouth recommendations). The SEM was divided into a measurement model and structural model to determine if the model is appropriate and estimate the parameters of the path coefficient. In addition, this study examined to see if fairness (procedural fairness, distributive fairness and interactive fairness) works as a moderating variable while the service recovery efforts affect customer satisfaction. Then, the role of service recovery strategies, targeted to satisfy the customers who were dissatisfied because of service failure, were investigated. In addition, its effect on post-satisfaction behavior was analyzed from the structural aspect, and the moderating role was examined as well. Then, the role of the service recovery strategy, which can be used to satisfy dissatisfied customers, was examined, and the effect of the satisfaction on customer behavior was analyzed from a structural perspective. In addition, the moderating role of fairness was tested. As a result, this study is significant in that it helps service providers formulate service recovery-related strategies.

테마파크 형 쇼핑센터의 공간구성에 관한 연구 - 저드파트너쉽의 설계 작품을 중심으로 - (An study on the Space Composition of the Theme Park-style Shopping Center - Focused on Designed Projects by Jerde Partnership -)

  • 하성주
    • 한국실내디자인학회논문집
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    • 제16권6호
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    • pp.144-151
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    • 2007
  • The idea of shopping is changed from a purchase of merchandise to an experience of pleasure. This study is a space composition analysis for the introduction of theme in multi-plex shopping center design to reflect variable consumer trend and company marketing strategy, The study progressed through theoretical consideration and substance analysis about the shopping centers which had been designed by Jerd Partnership In Japan since 2000. The following is result. The path is a sole main street that is made of curve form, parallel and vertical circulating rout and movement of human being. It leads continuity. The node and landmarks have a circular court with typifier as powerful center, character of transition space and event for experience. It makes locational quality. The districts are composed of retail shops, restaurants and culture facilities and the edge is represented by closed vertical wall and parapet. It induces a domain. The characteristic of Jerde shopping center is an experience of theme environment through the path as betweenness with a story based on a main theme. It is mostly related nature or exotic element and is obviously represented at path and node. The node takes a round shape and bring about event as a court. The application of theme to the shopping center by Jerde has a significant meaning for place marketing.

중국 스마트 농업 발전 전략 고찰 -[일대일로]와 [중국제조2025]전략을 중심으로 (A Study on the Strategies of China Smart Farming Development - From the Perspective of One Belt One Road Initiative and Made in China 2025 Plan -)

  • 장칭칭
    • 융합정보논문지
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    • 제8권5호
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    • pp.251-261
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    • 2018
  • 중국은 ICT 기술의 발전에 힘입어 스마트 농업분야에서 선진국을 급격히 추격하고 있다. 본 논문에서는 추격이론을 이용하여, 중국의 양대 국가 전략인 중국제조2025와 일대일로 전략이 스마트농업을 발전시키는데 있어서 어떻게 "기회의 창"을 제공하는지 분석하고자 한다. 시간 차원의 기술 선진화 전략인 '중국제조2025'와 공간 차원의 시장 확대 전략인 '일대일로' 정책이 T자형 상승 작용을 이루어 스마트 농업의 발전을 이끌고 있음을 단계 생략형, 경로 창출형, 경로 추종형 3가지 유형으로 나누어 설명하였다. 한국 스마트 농업의 주요 수출 시장이며, 글로벌 시장에서 강력한 경쟁자인 중국 스마트 농업에 대한 이해를 통해 한국 스마트 농업의 해외진출 전략에 대한 시사점을 도출하였다.

산업용 가스터빈을 위한 정비지원 시스템 개발에 관한 연구 (A Development of EMAS (Easy Maintenance Assistance Solution) for Industrial Gas Turbine)

  • 강명철;기자영
    • 한국추진공학회지
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    • 제21권3호
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    • pp.91-100
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    • 2017
  • 복합화력 발전소의 가스터빈 정비 의사 결정을 지원하기 위한 솔루션을 개발하였다. 대상 엔진은 군산 복합화력 발전소에서 사용하고 있는 MHI 501G 가스터빈이다. 개발된 솔루션은 다음과 같은 모듈들을 통해 최적의 정비주기 계산 결과를 제공해주며, 각 모듈에는 실시간 성능 감시, 모델기반 성능진단, 성능 경향분석, 최적 오버홀 정비주기 예측, 압축기 최적 세정주기 관리, BPT (Blade Path Temperature) 분석 기능이 포함되어 있다. 모델 기반 성능진단은 실시간으로 계측되는 성능 파라미터 데이터와 가스터빈 시뮬레이션 결과를 비교하여 그 차이를 분석하여 진단을 수행한다. 압축기 세정주기 분석은 압축기 성능과 정비비용 사이의 최적 점을 제시한다.

지지면의 수평 진동에 따른 동적 자세 제어 특성에 관한 연구 (Study on the Characteristic of Dynamic Postural Control during Horizontal Translation of Support Surface)

  • 오가영;박용군;권대규;김남균
    • 대한의용생체공학회:의공학회지
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    • 제30권6호
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    • pp.495-502
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    • 2009
  • This paper investigated the effects of dynamic postural control for maintaining upright standing on a support surface during continuous sinusoidal horizontal translation in anterior-posterior direction. 15 healthy young subjects participated in this experiment. The analysis of body movement was analyzed using Ariel Performance Analysis System. Motion pattern was analyzed by seven markers on subject's body. Position of markers were head, chest, hip, right knee, left knee, right ankle and left ankle. Seven different frequencies of support surface were employed ; 0.1, 0.25, 0.5, 0.75, 1, 1.5 and 2Hz at 2cm of moving path of motionbase. The experiments were performed dynamic postural reponses at the condition of eye open. The results showed that median frequency of the knee, ankle were increased in all frequency bands. Following the frequency of perturbation increased, postural control strategy was changed from ankle strategy to combined strategy. The experiment results could be applied to the dynamic postural training for the elderly and the rehabilitation training for the patients to improving the ability of postural control.

R&D Transitions in Response to Digital Transformation in Korea

  • Lim, Jongyeon;Lee, BangRae;Won, Dongkyu
    • Journal of Information Science Theory and Practice
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    • 제10권spc호
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    • pp.96-111
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    • 2022
  • With the rapid development of the Fourth Industrial Revolution and digital transformation, scientific and technological innovation measures are being devised to overcome Korea's low-growth, high-cost structure. Accordingly, by examining the R&D investment evaluation system of R&D PIE (R&D Platform for Investment and Evaluation), which has been promoted by the Korean government in response to the Fourth Industrial Revolution, from the perspective of R&D transformation, this study aims to explore a new path for a sustainable national science and technology innovation system following digital transformation. In particular, from the perspective of R&D PIE, a MLP (Multi-level Perspective), which had been conducted as an abstract theoretical study, was attempted with specific cases and analysis for each of the three layers: niche, landscape, and regime. In conclusion, R&D PIE was intended to elevate the abstract R&D investment evaluation system to a platform that leads innovation in the digital space of the Fourth Industrial Revolution. In addition, it was confirmed that the R&D PIE could be replaced or enhanced as a platform for innovation in response to the Fourth Industrial Revolution, thereby providing an alternative to job creation and an escape from economic crisis.

저드파트너쉽 쇼핑센터의 표현 특성에 관한 연구 - 테마파크형 공간구성을 중심으로 - (An study on the Expressive Characteristics of Jerde Partnership's shopping center - Focused on Space Composition of Theme Park-style -)

  • 하성주;하미경
    • 한국실내디자인학회:학술대회논문집
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    • 한국실내디자인학회 2007년도 추계학술발표대회 논문집
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    • pp.103-106
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    • 2007
  • The idea of shopping is changed from a purchase of merchandise to an experience of pleasure. This study is a space composition analysis for the introduction of theme in multi-plex shopping center design to reflect variable consumer trend and company marketing strategy. The study progressed through theoretical consideration and substance analysis about the shopping centers which had been designed by Jerd Partnership from 2000 in Japan. The following is result. The path is a sole main street that is made of curve form, parallel and vertical circulating rout and movement of human being. It leads continuity. The node and landmarks have a circular court with typifier as powerful center, character of transition space and event for experience. It makes locational quality. The districts are composed of retail shops, restaurants and culture facilities and the edge is represented by closed vertical wall and parapet. It induces a domain. The characteristic of Jerde shopping center is an experience of theme environment through the path as betweenness space with a story based on a main theme.

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확장된 외식브랜드이미지와 브랜드태도가 브랜드충성도에 미치는 영향에 관한 연구 (The Effectiveness of Image and Attitude on Extension Brand Loyalty in the Foodservice Industry)

  • 권금택
    • 경영과정보연구
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    • 제28권2호
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    • pp.1-19
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    • 2009
  • 많은 외식기업들은 시장에서 이미 성공한 브랜드를 무형의 자산으로 취급하고, 이를 보다 적극적으로 활용하기 위한 마케팅 전략의 일환으로 브랜드확장을 이용하고 있다. 브랜드확장전략은 브랜드이미지를 강화하고 마케팅비용을 감소한다. 본 연구의 결과는 다음과 같다. 첫째, 본 연구의 가설 (H-1)에 해당하는 확장브랜드에 대한 이미지와 확장브랜드에 대한 태도와의 관계를 검증한 결과, 계수 값이 0.43, t값이 4.21로 나타나 통계적인 유의성이 검증되었다. 확장된 브랜드 이미지는 확장된 브랜드 태도에 가장 강력하게 영향을 미친다. 둘째, 확장브랜드에 대한 태도와 확장브랜드의 충성도간의 관계(H-2)에 있어서도 계수의 값이 0.29, t값이 3.08로 나타나 확장브랜드에 대한 태도가 확장브랜드의 충성도에 영향을 미친다는 것을 알 수 있다. 본 연구결과, 외식브랜드는 고객과 외식기업간의 단순한 거래의 수단이 아닌 지속적인 관계의 개념의 확장으로써 적용되는 상호작용적 수단으로 인식해야 한다. 특히 이미지와 태도, 그리고 재방문의도, 추천의도와 같은 충성도와 어떠한 영향관계가 있는지 조명한 부분은 이와 유사한 선행연구들의 이론적 한계를 극복할 하나의 이론적 실마리를 제공한다.

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A proposed set of popular limit-point buckling benchmark problems

  • Leahu-Aluas, Ion;Abed-Meraim, Farid
    • Structural Engineering and Mechanics
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    • 제38권6호
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    • pp.767-802
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    • 2011
  • Developers of new finite elements or nonlinear solution techniques rely on discriminative benchmark tests drawn from the literature to assess the advantages and drawbacks of new formulations. Buckling benchmark tests provide a rigorous evaluation of finite elements applied to thin structures, and a complete and detailed set of reference results would therefore prove very useful in carrying out such evaluations. Results are usually presented in the form of load-deflection curves that developers must reconstruct by extracting the points, a procedure which is often tedious and inaccurate. Moreover the curves are usually given without accompanying information such as the calculation time or number of iterations it took for the model to converge, even though this type of data is equally important in practice. This paper presents ten different limit-point buckling benchmark tests, and provides for each one the reference load-deflection curve, all the points necessary to recreate the curve in tabulated form, analysis data such as calculation time, number of iterations and increments, and all of the inputs used to obtain these results.