• Proceedings of the KSRS Conference
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• 2003.11a
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• pp.499-501
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• 2003

As semiconductor memory becomes cheaper, the memory capacity of computer system is increasing. Therefore computer system has sufficient memory for a plentiful spatial data. With emerging spatial application required high performance, this paper presents a GIS database system in main memory. Memory residence can provide both functionality and performance for a database management system. This paper describes design of DBMS for storing, querying, managing and analyzing for spatial and non-spatial data in main-memory. This memory resident GIS DBMS supports SQL for spatial query, spatial data model, spatial index and interface for GIS tool or applications.

• Journal of the Korean Society of Industry Convergence
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• v.20 no.1
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• pp.74-80
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• 2017

This study aimed to evaluate the validity of an exhausted injector design for filtration system and the performance characteristics thereof. The evaluation was intended through computational fluid dynamics(CFD) analysis based on computer simulation rather than through prototype fabrication and testing. Furthermore, the design of experiment was used to create an experimental design table by which the reaction characteristics of response factors were analyzed for design parameters. All experiments were substituted with computer simulations. Lastly, an optimal design model for the injection tubes was determined based on response surface method algorithms.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 1999.05a
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• pp.83-88
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• 1999

This study presents development of an software for process and die design of hot extrusion through square dies. The design of extrusion dies is still an art rather than a science with increasing complexity of shape and thinness of section. Therefore, most of the die design is still dependent on personal judgement, intuition and experience. The objective of this study is to develop an software system which includes a design rule extracted from literatures and experts in the extrusion industry. The system also includes finite element simulation program. The developed system is effectively used to design extrusion processes and dies with lead time and trial extrusion.

• Computational Structural Engineering
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• v.11 no.4
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• pp.371-382
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• 1998

지난 수 십년 간 컴퓨터는 구조설계에 있어서 그 이용이 증가하고 있다. 구조설계를 위한 컴퓨터 시스템을 개발하기 위해서는 먼저 구조설계에 관련된 정보와 작업을 정형화한 표현이 필요하다. 본 논문은 구조설계에서 설계정보와 설계작업의 이해와 표현이 어려운 분야의 하나인 시스템설계에 대하여 논하고 있으며, 빌딩 프레임구조물의 시스템 설계정보를 표현하는 한 방법을 기술하고 있다. 3차원 공간을 표시하기 위하여 기준평면과 그리드 라인을 정의하였으며, 빌딩 프레임구조물의 시스템을 프레임 서브시스템, 플로어 서브시스템, 시스템요소 기둥의 세 종류의 요소로 분해하였다. 시스템요소 기둥은 프레임의 요소가 아니고, 시스템의 요소이다. 시스템 설계정보를 표현하기 위한 이와 같은 방법을 개체형 통합설계모델의 표기법을 이용하여 표시하였다. 개체형 통합설계모델은 설계정보와 설계작업을 표현하기 위하여 각각 프로덕트 개체와 프로세스 개체를 이용한다. 시스템 설계정보를 위하여 본 논문에서 정의한 프로덕트 개체들은 정형화된 시스템 설계정보를 표현하는데, 이것은 구조설계 CAD 시스템 개발에 유용하다.

• Journal of Advanced Navigation Technology
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• v.12 no.3
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• pp.255-262
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• 2008

In this paper, we developed the circuit and part information maintenance system based on JSP (Java Server Page) web server using web browser. Designers can easily search part information and register the new components or parts, and this system is linked to the EDA (Electronic Design Automation) system to be applicable to the circuit and part schematics in real time. Therefore, EDA system part library managed by individual designers are integrated into the web-based maintenance system.

• 제어로봇시스템학회:학술대회논문집
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• 1996.10a
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• pp.354-357
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• 1996

Virtual Manufacturing System(VMS) is an integrated computer based model which has physical, logical schema and behavior of real manufacturing system. In this paper, an integrated scheduling system is developed to simulate and control a Virtual Factory. A workflow model is constructed to define and analyze the structure of a VMS. On-line dynamic dispatching system is developed using MultiPass algorithm and scheduling system considering dynamic CAPP is carried out. Integrated scheduling system developed in this paper reduces the discrepancies between virtual model and real manufacturing system, and control of real shop floor is possible.

• International Journal of CAD/CAM
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• v.2 no.1
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• pp.1-12
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• 2002

Computer-Aided Reliable and Optimal Design (CAROD) system is an efficient tool defining the best compromise between cost and safety. Using the concurrent engineering concept, it can supply the designer with all numerical information in the design process. This system integrates several fields such as multidisciplinary optimization, reliability analysis, finite element analysis, geometrical modeling, sensitivity analysis and concurrent engineering. When integrating these disciplines, many difficulties are found such as model coupling and computational time. In this paper, we propose a new concurrent methodology satisfying the reliability requirement, allowing the coupling of different models and reducing the computational time. Two applications (rotating disk and hook structures) demonstrate that CAROD system can be a practical concurrent engineering application for designers.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.06a
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• pp.409-410
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• 2007

• Journal of the Korean Society of Costume
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• v.12
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• pp.68-86
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• 1988

This paper is described about applied method of personal computer for clothes-patterns. The personal Computer (Fijitsu FM-$16{\beta}$) and X-Y Plotter (GRAPHTEC GP-9101 R) were used in this study. It is studied to draft of sleeve designs automartically in this paper. The Basic Language is used and the programs were main program and subroutine programs. The results are as follows; 1) The Y's system of sleeve sloper is selected in this study. 2) The co-ordinate points were indicated relative location of all necessary in drafting of sleeve designs. 3) In the variations of sleeve sloper, Puff sleeve and Raglan sleeve were selected. Programs for drafting of them were developed. 4) About the drafting of Raglan curve, it is gotten adequate curve using sprine function. 5) Clothes-Pattern are making very correctly and quickly by using computer.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.51 no.9
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• pp.441-450
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• 2002

In this paper, optimal tuning problem of power system stabilizer using IA-QFT is investigated to improve power system dynamic stability in spite of parameter variation and disturbance uncertainties. The most important feature of QFT is that it is able to deal with the design problem of complicated uncertain plants. However, loop shaping is currently performed in computer aided design environments manually and it is usually a trial and error procedure. It is difficult to design a controller to satisfy all specifications manually. To solve this problem, a study of design automation using IA needs to be taken into account. The robustness of the proposed controller has been investigated on a single machine infinite bus model. The results are shown that the proposed PSS using IA-QFT is more robust than conventional PSS.