• 농촌지도와개발
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• 제4권1호
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• pp.97-120
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• 1997

This study intends to develop a computer software for an efficient swineherd production and management. Current softwares are concerned on the sow management and ignore the actual farm environment. This study focuses on the farm environment in developing the software and covers the production management financial management, marketing management, and business planning for swineherd farm. The FSR(Farming Systems Research) analysis and interview survey aye applied to collect the data for the system planning, farmer's demand and analysis on the system, system design and program development. The systems are designed to meet the needs for the progressive swineherd farmers. Visual FoxPro 5.1 is used to develop the system. The developed system includes pig farm financial records keeping and management, pig farm production management program, pig farm marketing management program, and pig farm business diagnosis and planning program to meet the scope of the study. The weekly maintenance records and financial records are adopted for the input interface since most of farmers use their computer less than 5 hours a week. Pulldown Menu systems are adopted and designed for easy use by structuring to meet the pig farm and system demands. The manu system allocates the input-output screen based on the sectors, scopes, users, frequencies, importances, and the usages of the information. The GUI(Graphic User Interface) method is used to develop input-output screens for easy use. Backward Chaining mechanism fo the Expert System is used in the diagnosis of the pig farm management and the Systems Simulators Approach is used in the pig farm management planning.

• 컴퓨터교육학회논문지
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• 제9권6호
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• pp.79-87
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• 2006

필요한 정보를 쉽게 이용할 수 있는 이동형 유비쿼터스 환경이 급속히 발전하고 있다. 이동형 유비쿼터스 단말기 뿐 아니라 컴퓨터 하드웨어의 발전은 이를 더욱 가속화 하고 있으며 대표적인 이동형 단말기인 PDA, 셀룰라 폰, 스마트 폰, 노트북 등에 이동형 유비쿼터스 컴퓨팅 기술이 사용되고 있다. 현재 그래픽 또는 음성을 통한 다양한 사용자 인터페이스 환경이 이동형 유비쿼터스 단말기를 위하여 개발되고 있다. 본 논문에서는 사용자의 사용 방식을 분석하여 각 사용자 특성에 맞는 표준화된 형식의 XML 정보를 이동형 단말기 사용자에게 전달하고 상대적으로 적은 화면을 가지는 이동형 단말기에 효과적으로 정보를 제공할 수 있는 사용자 인터페이스 환경을 제시한다.

• 한국컴퓨터정보학회논문지
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• 제9권4호
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• pp.61-69
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• 2004

인간과 컴퓨터 사이의 복잡한 상호작용을 지원하기 위해서는 사용자 인터페이스의 설계가 중요하다. 고객의 요구사항을 수집하고 설계하기 위하여 매우 포괄적인 다방면의 지식이 요구된다. 사용자 인터페이스 설계자는 그래픽 전문가, 요구사항 분석가, 시스템 설계자, 프로그래머, 기술 전문가, 사회 행동과학자, 그리고 업무분야에 따라서 그 분야의 전문가를 필요로 한다. 따라서 다방면의 전문성을 만족시킬 수 있는 사용자 인터페이스를 설계하기 위하여 더 많은 연구가 요구되고 있다. 본 논문에서는 필드 추상화 객체, 태스크 추상화 객체, 트랜잭션 추상화 객체, 폼 추상화 객체 등의 4단계의 가시화 기법을 제안한다. 이 모델링 단계는 사용자 인터페이스에서 가시적 응집도를 향상시켜주고, 초보 설계자도 양질의 사용자 인터페이스를 개발할 수 있도록 지원한다.

• 한국컴퓨터정보학회논문지
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• 제8권4호
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• pp.28-34
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• 2003

ASN.1은 망 관리에 필요한 기초적인 제반기술이다. ASN.1의 개발에는 ASN.1 명세 언어를 파싱하는 컴파일러 작업과 컴파일 결과 생성된 자료들을 DB에 입력하고, 입력된 자료를 사용자에게 프리티프린팅하여 보여주는 작업이 요구된다. 본 논문에서는 ASN.1 명세를 객체지향 언어인 C++로 자동적으로 변환하여 주는 원시 코드 자동 생성기를 설계하고 구현한다. 이와 함께 ASN.1 개발환경에 필요한 그래픽 사용자 인터페이스, DB 인터페이스 및 ASN.1 브라우저를 포함하는 통합 환경을 제공한다. 본 시스템의 구현은 Objectivity 데이타베이스를 이용하였고, 컴파일러 작업에서는 컴파일러 보조 도구인 flex와 byacc을 이용하였으며, 인터페이스 언어로는 Tcl/Tk를 사용하였다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2000년도 춘계학술대회 논문집
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• pp.829-832
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• 2000

This paper describes a research work of developing a computer-aided design of product with bending and piercing for progressive working. An approach to the CAD system is based on the knowledge-based rules. Knowledge fur the CAD system is formulated from plasticity theories, experimental results and the empirical knowledge of field experts. The system has been written in AutoLISP on the AutoCAD with a personal computer and is composed of three main modules, which are input and shape treatment, flat pattern layout and strip layout module. Based on knowledge-based rules, the system is designed by considering several factors, such as radius and angle of bend, material and thickness of product, complexities of blank geometry and punch profile, bending sequence, and availability of press. Strip layout drawing automatically generated by piercing with punch profiles divided into for external area is simulated in 3-D graphic forms, including bending sequences for the product with piercing and bending. Results obtained using the modules enable the manufacturer of electronic products to be more efficient in this field.

• 한국조경학회지
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• 제27권4호
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• pp.143-150
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• 1999

The purpose of this research is to find som ways to model tree forms more efficiently in reference with surveying structural data and handling parameters in plant Editor of AccuRender, the AutoCAD-based rendering software adopting the procedural plant modeling technique. In case of modelling a new tree, because it is efficient to modify an existing tree data as a template, we attempted to classify 81 species' data from existing plant library including conifers and deciduous tree. According to the qualitative characteristics and quantitative parameters of geometrical and branching structure, 8 types of tree form were classified with factor and cluster analysis. Some critical aspects found in the distributions of standardized scores of parameters in each type were discussed for explaining the tree forms intuitively. For adaptability of the resulted classification and typical parameters, 10 species of tree were measured and modelled, and proved to be very similar to the real structures of tree forms. CG or CAD-based plant modelling technique would be recommended not only as a presentation tool but for planting design, landscape simulation and assessment.

• 대한기계학회논문집
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• 제12권1호
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• pp.95-105
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• 1988

본 연구에서는 실험적인 모우드해석법을 실제의 테니스 라켓에 적용하여 모우드파라미터를 구한 다음, 그 파라미터의 변화에 따르는 안정타점영역의 변화를 컴퓨터 시뮬레이션을 통해서 에측하였다. 또한 안정타점영역을 확장시키고 라켓의 동특성을 개선시킬 수 있는 모우드파라미터를 찾아서 라켓의 설계제작단계에 정보를 제공하는 테니스 라켓의 CAD(Computer Aided Design) 화를 위한 자료 획득을 목적으로 한다.

• 정보학연구
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• 제8권3호
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• pp.1-10
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• 2005

Cosine and Sine function is widely used for the arithmetic, translation, object drawing, Simulation and etc. of Computer Graphics in Natural Science and Engineering. In general, Cordic Algorithm is effective method since it has relatively small size and simple architecture on trigonometric function generation. However profitably it has those merits, the problem of operation speed is occurred. In graphic display system, the operation result of object drawing is quantized and has the condition that is satisfied with rms error less than 1. So in this paper, the proposed generator is composed of partition operation at each ${\pi}/4$ and basic Cosine, Sine function generator in the range of $0{\sim}{\pi}/4$ using the lower order of Tayler's series in an acceptable error range, that enlarge the range of $0{\sim}2{\pi}$ according to a definition of the trigonometric function for the purpose of having a high speed Cosine, Sine function generation. And, division operator using code partition for divisor three is proposed, the proposed function generator has high speed operation, but it has the problems in the other application parts with accurate results, is need to increase the speed of the multiplication.

• 한국정밀공학회지
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• 제16권11호
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• pp.174-182
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• 1999

This paper describes a research work of developing a computer-aided design of product with bending constraints and piercing for progressive working. an approach to the CAD system is based on the knowledge-based rules. Knowledge for the CAD system is formulated from plasticity theories, experimental results and the empirical knowledge of field experts. The system has been written AutoLISP on the AutoCAD with a personal computer and is composed of four main modules, which are input and shape treatment, flat pattern layout, production feasibility check, and strip-layout module. Based on knowledge-based rules, the system is designed by considering several factors, such as radius and angle of bend, material and thickness of product, complexities of blank geometry and punch profile, bending sequence, availability of press. Strip layout drawing generated by piercing with punch profiles divide into automatically for external area is shown into graphic forms, including bending sequences for the product with piercing and bending constraints. Results obtained using the modules enable the designer and manufacturer of piercing and bending dies to be more efficient in this field.

• 통합자연과학논문집
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• 제11권4호
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• pp.192-196
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• 2018

The mobile agent paradigm can be exploited in a variety of ways, ranging from low-level system administration tasks to middle ware to user-level applications. Mobile agents can be useful in building middle-ware services such as active mail systems, distributed collaboration systems, etc. An active mail message is a program that interacts with its recipient using a multimedia interface, and adapts the interaction session based on the recipient's responses. The mobile agent paradigm is well suitable to this type of application, since it can carry a sender-defined session protocol along with the multimedia message. Mobile agent communication is possible via method invocation on virtual references. Agents can make synchronous, one-way, or future-reply type invocations. Multicasting is possible, since agents can be aggregated hierarchically into groups. A simple check-pointing facility has also been implemented. Another proposed solution is to use multi agent computer systems to access, filter, evaluate, and integrate this information. We will present the overall architectural framework, our agent design commitments, and agent architecture to enable the above characteristics. Besides, the each information needed a mobile agent system such as text, graphic, image, audio and video etc, constructed a great capacity multimedia database system. However, they have problems in establishing connections over multiple subnetworks, such as no end-to-end connections, transmission delay due to ATM address resolution, no QoS protocols. We propose a new connection management scheme in the thesis to improve the connection management involved of mobile agent systems.