• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
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• pp.805-812
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• 1989

An efficient diagnostic approach for real-time operation aiding expert system in chemical process plants is discussed. The approach is based on the hybrid of the simplified symptom tree(SST) and the fault consequence digraph(FCD), representation of propagation patterns of fault states. The SST generates fault hypothesis efficiently and the FCD resolve the real fault accurately. Frame based knowledge representation and object-oriented programming make diagnostic system general and efficient. Truth maintenance system enables robust pattern matching and provides enhanced explain facilities. A prototype expert system for supports operation of naphtha furnaces process, called OASYS, has been built and tested to demonstrate this methodology. Utilization of diversified process symbolic data, produced using dynamic normal standards, overcomes the problem of qualitative Boolean reasoning and enhance the applicability.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1992년도 한국자동제어학술회의논문집(국제학술편); KOEX, Seoul; 19-21 Oct. 1992
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• pp.446-451
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• 1992

In this paper, we propose a method to manage production system easily for operators when either equipments or products are changed. And we explain the scheduling AI tool which realizes the proposal method. The tool's knowledge expression consists of models, rules, mathematical expression and fuzzy logic. The model expresses the relations between products and manufacture, and properties of products. The models are separated into three type, equipment model, operation model, and product model. These models are classified by applicable fields as the assembly process or continuous plant process, The model expression of each type is based on object oriented paradigm. We report systems utilizing our approach.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1993년도 가을 학술발표회논문집
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• pp.163-172
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• 1993

This paper presents a database approach to integrating the structural analysis and design processes for a typical shear wall apartment building design. Our initial efforts have focused on extracting various graphic information from CAD(AutoCAD™) systems. But now, we concentrate our research efforts on organizing specific information generated during the structural analysis and design processes. The proposed overall system consists of a conventional structural analysis package, a conventional CAD system, and different application interface programs. This system is based on an engineering database which is developed by using an object-oriented data modelling approach. The system is actually implemented on an ORACLE™-based relational database management system.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.36.6-36
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• 2001

The problem of robot navigation and control is a complex task. Its complexity and characteristics depends on the characteristics of the environment robot inhabits, robot construction (mechanical abilities to move, sense) and the job the robot is supposed to do. In this paper we propose a hybrid programming approach to mobile robot navigation and control in an indoor environment. In our approach we used declarative, procedural, and object oriented programming paradigms and we utilized some advantages of our distributed computing architecture. The programming languages corresponding to the paradigms we used were C, C++ and Prolog. In the paper we present some details of our mobile robot hardware and software structure, focusing on the software design and implementation.

• 정보처리학회논문지:소프트웨어 및 데이터공학
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• 제3권7호
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• pp.255-262
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• 2014

기존 논문[1]에서는 Fillmore의 Case Grammar를 기반으로 객체 추출 및 모델링 방법을 제안하였다. 이 방법은 유스케이스 추출 및 결정 방법을 고려하지 않았다. 이러한 문제를 해결하기 위해, 본 논문에서는 요구공학에서 자연어 처리를 위해 Fillmore의 의미적 방법을 채택하였다. 즉, 고객 요구사항으로부터 유스케이스를 모델링하고 추출하기 위해 Fillmore의 Case Grammar를 개선한다. 개선된 메커니즘은 구조화된 절차를 정의하고 시각적 표기법을 수행한다. 또한 유스케이스의 복잡성과 관련된 Goal 지향 요구공학(GoRE)을 기반으로 추출된 유스케이스에서 유스케이스 크기를 식별하는 유스케이스 결정 매트릭스(Use Case Decision Matrix)를 제안한다. 이 매트릭스에서 유스케이스를 우선순위화 한다. 사례연구로 은행 ATM 시스템에 적용하였다.

• 한국정밀공학회지
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• 제16권7호
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• pp.109-118
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• 1999

A graphic software is one of the most important components of the vehicle simulator. To increase a visual reality of the simulator, the graphic software should require several technologies such as three-dimensional graphics, graphic modeling of the vehicle and the environment, drivers biomechanical models, and real-time data processing. This study presents a real time graphic driving simulator of a construction vehicle. The graphic simulator contains the three models of the construction vehicle, the human, and the environment, and employes a neural network approach to decrease an on-line dynamic computation. An excavator model is represented using an object-oriented paradigm and contains the detailed information about a real-size vehicle. The human model is introduced for objective visual evaluations of the developed excavator model. Since the environment model plays an important role in a real-time simulator, a block-based approach is implemented and a text format is utilized for easier construction of environment. The simulation results are illustrated in order to demonstrate the applicability of developed models and the neural network approach.

• Wind and Structures
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• 제9권1호
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• pp.37-58
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• 2006

The paper describes a study about effects of upstream hills on design wind loads using two mathematical approaches: Computational Fluid Dynamics (CFD) and Artificial Neural Network (NN for short). For this purpose CFD and NN tools have been developed using an object-oriented approach and C++ programming language. The CFD tool consists of solving the Reynolds time-averaged Navier-Stokes equations and $k-{\varepsilon}$ turbulence model using body-fitted nearly-orthogonal coordinate system. Subsequently, design wind load parameters such as speed-up ratio values have been generated for a wide spectrum of two-dimensional hill geometries that includes isolated and multiple steep and shallow hills. Ground roughness effect has also been considered. Such CFD solutions, however, normally require among other things ample computational time, background knowledge and high-capacity hardware. To assist the enduser, an easier, faster and more inexpensive NN model trained with the CFD-generated data is proposed in this paper. Prior to using the CFD data for training purposes, extensive validation work has been carried out by comparing with boundary layer wind tunnel (BLWT) data. The CFD trained NN (CFD-NN) has produced speed-up ratio values for cases such as multiple hills that are not covered by wind design standards such as the Commentaries of the National Building Code of Canada (1995). The CFD-NN results compare well with BLWT data available in literature and the proposed approach requires fewer resources compared to running BLWT experiments.

• 한국실내디자인학회논문집
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• 제20권1호
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• pp.51-60
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• 2011

Analysis of trend by various information is systematically approached by strategy differentiating in Interior Design. At the present, trend is approached by intuitive viewpoint without systematic strategy and analysis system about interior coordination activity. And, it is not still established specific systematic architecture of the interior coordination by logical and academical approach. This Study set the goal at overall understanding about the Trend that shifting fast and offering objective data. Therefore, I approached the semiology-oriented process as the most suitable academical system on analysis of interior coordination trend. Object target of analysis was investigated to three domestic and overseas exhibitions announced from 2007 to 2008. These analysis was based on the context and text from the life style and the major determinant theme of the age of each exhibition. Also, it was arranged color, material and texture by the related expression system with topics and theme keywords. And it'll be considered as utilizing the code of specific application in interior coordination which is from the investigating about exhibition. Therefore, this study will be expected to help in meaning transmission and methodology establishment by more beneficial objective system, when designer work the interior coordination practically through the establishment of systematic viewpoint about interior coordination.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제14권1호
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• pp.81-85
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• 2008

객체지향 패러다임에서 커플링은 유지보수활동에 가장 큰 영향을 주는 속성 중 하나로 많은 연구들이 진행되어 왔다. 그러나 기존의 커플링 척도는 클래스들간의 의존성 여부만 측정할 뿐 의존성 강도를 표현하지 못하기 때문에 리팩토링이나 시스템 분해와 같이 의존성 강도 정보가 필요한 유지보수활동에서 의사 결정을 지원하는데 한계가 있다. 이 논문에서는 이를 해결하기 위해 클래스 간의 의존성 여부뿐만 아니라 유지 보수성-재검사 비용 측면에서 클래스 간의 의존성 강도까지 표현할 수 있는 커플링 척도를 제안한다. 그리고 시스템 분해 문제에 적용한 예제를 통하여 시스템 유지 보수를 위한 여러 분야에 적용될 수 있음을 보인다.

• 한국멀티미디어학회논문지
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• 제13권4호
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• pp.601-608
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• 2010

본 연구는 가상현실 콘텐츠를 제작함에 있어서 공간정보 중심의 파노라마VR(Virtual Reality)과 객체정보 중심의 오브젝트 VR의 단점을 극복하고 3차원 가상현실 콘텐츠를 실사 이미지를 활용하여 효과적으로 제작할 수 있는 새로운 방안을 제시한다. 3차원 VR은 사용자에게 만족할만한 품질을 제공하지만 복잡한 물체에 대한 3차원 모델링 및 랜더링은 많은 비용이 소요된다. 이러한 문제를 해결하기 위해 본 논문은 관찰자 시점에서 관측 가능한 이미지를 빌보드에 매핑하는 방식의 '개선된 빌보드'를 활용하여 3차원으로 모델링을 하지 않고도 실사 이미지를 활용하여 3차원 효과를 나타내는 것을 목표로 한다. 제안된 방법의 타당성을 검증하기 위하여 가상박물관을 구현하고, 3차원 가상공간에 실사 이미지를 이용한 전시물들을 배치하는 통합형 가상현실 콘텐츠를 제작하여 결과를 제시한다.