• Proceedings of the Korean Nuclear Society Conference
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• 1995.05a
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• pp.995-1000
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• 1995

ASME B&PV Code Section III NB-3200의 규정은 원자로 관련 1등급 부품의 설계시 지켜야할 사항이다. 이 규정은 운전조건별로 허용응력에 대한 분류를 하여 허용한도를 규정하고 있다. 따라서 응력해석시 이 규정을 적용하기 위해 해석결과의 검색, 추출정리, 추가계산 등 응력해석 후속작업을 위한 통합 program을 awk 언어를 사용하여 개발하였다. 이 통합 Program은 ASME에 규정된 응력별로 여러 개의 awk program module로 작성하였고 각각의 모듈을 통합하는 UNIX script file로 구성되어있다. 각각의 모듈은 독립된 batch 작업이 가능하고, 이것을 모두 연계한 batch 작업 역시 가능하도록 하였다. 문서작성시 도표작성을 용이하게 하기 위해 후처리결과가 하나의 디렉토리에 저장되도록 하였다.

• Proceedings of the KSR Conference
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• 1998.05a
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• pp.427-435
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• 1998

In this paper will be presented an algorithm for designing of a railway interlocking table which is a document describing the functional specification of the interlocking device. The ability to produce an interlocking table has been handed down in the signalling engineers society. And the signalling engineer makes the most of his expertise to produce an interlocking table. But, the expertise has not yet been organized into technical system, the core of the expertise is a hard nut to crack. Therefore, we analyze into signal engineering expertise, and propose a generalization of interlocking notion. Also, an algorithm is drawn up based on a train route setting principle to solve practical and general problems by computer And the performance of the algorithm is evaluated for test program based on AutoCAD technology. The evaluation result shows that it can be utilized as the effective algorithm for computer control of the signalling system as interlocking device, that it improved in safety

• Proceedings of the KIEE Conference
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• 1999.07a
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• pp.440-442
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• 1999

본 연구에서는 전자연동장치의 확장성과 신뢰성 제고를 위해 전자연동장치의 실시간 연동전략으로 활용될 수 있는 연동 지식베이스를 자동 생성, 구축할 수 있는 지능형 연동지식베이스 자동 구축 소프트웨어(IIKBAGS)를 개발한다. IIKBAGS의 추론부는 주어진 역 모델의 동적탐색하에서 휴리스틱 규칙들의 우선순위에 따라 모든 진로를 탐색함은 물론 각 진로들에 대해 진로상 신호설비들간의 연쇄관계를 확인하여 연동패턴들을 자동생성하는 연동지식 자동생성기능을 가진다. 지식베이스는 전자연동장치상의 실시간 전문가 시스템이 직접적으로 활용할 수 있는 구조로 설계됨으로써 연동도표 입력과정에서 발생할 수 있는 오류를 배제, 연동장치의 정확성과 신뢰성을 높인다.

• Journal of the Korean Institute of Telematics and Electronics
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• v.23 no.2
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• pp.269-277
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• 1986

This paper proposes a new algorithmic state machine(ASM) chart and a new hardware description for automatic logic design of VLSI. To describe the behavioral characteristics of the design specification, the conventional ASM chart is modified, and a new hardware description language, SDL, is proposed. The SDL is one-to-one correspondent to the proposed ASM chart symbol, and can be used in a hierachical design of VLSI. As a design example, we obtain a logic circuit diagram of gate lebel utilizing a SDL hardware compiler after drawing an ASM chart and describing in SDL.

• Journal of Korean Society of Steel Construction
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• v.17 no.3 s.76
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• pp.347-356
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• 2005

Recently, pre-engineering building (P.E.B.) systematic frames are increasingly being used in steel factory buildings, but almost of the related techniques are dependent on the engineering program (e.g, MBS, LTI), which is usually imported from other countries. These are designed under the AISC-ASD because at present there is no Korean design code for P.E.B. frames. Also, there are few studies onbehaviour and we need to develop the element techniques by using H-shaped components.In particular, there is a tendency towards overestimated design because column-rafter connections have been designed with extended end plate type joint, which is treated asrigid joint,so structural examinations are needed. Therefore, this study represents a basic step in ascertaining the application of P.E.B. systematic frames by using H-shaped column-rafter connectionwith flush type end plate. Its structural performance is compared with that of existing extended type joint using a structural performance test. The structural behaviour of specimen was understood qualitatively and the possibility of application (e.g, design aid charts) of semi-connection (flush type) with H-shaped column-rafter was determined.

• Journal of the Korean Geotechnical Society
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• v.15 no.1
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• pp.15-29
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• 1999

This study presents an analytical method of estimating the developed horizontal active thrusts against GRS-RW( Geosynthetic Reinforced Soil Retaining Wall) system adapted to the case of distanced surcharge. In addition, the design charts that could be used for preliminary design of GRS-RW system are presented. The proposed method of analysis uses two body translation mechanism as well as force polygon concept. taking into account the effect of facing's rigidity. Besides. the effect of tension cracks in c-\Phi$ soils, seismic effects and horizontal distance from the back face of wall to uniformly distributed surcharge loadings are also included. The results of horizontal active thrusts obtained from the developed method of analysis are compared with those from Jarquio's modified Boussinesq equation.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.31 no.4
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• pp.99-104
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• 2003

This paper described the general dynamic point for rotor design and the design procedure of low vibration blade. Generally, rotor rotating natural frequencies are determined to minimize hub loads, blade vibration and to suppress ground resonance at rotor design stage. First, through rotor frequency diagram, natural frequencies must be far away from resonance point and rotating loads generated from blade can be transformed to non-rotating load to predict fuselage vibration. Vibration level was predicted at each forward flight condition by calculating cockpit's vertical acceleration transferred from non-rotating hub load assuming a fuselage as a rigid body. This design method is applied to design current Next-generation Rotor System Blade(NRSB) and will be applied to New Rotor which will be developed Further.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.12
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• pp.6022-6026
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• 2012

This article presents a band-stop filter (BSF) by using a periodic structure property of frequency selective surfaces (FSSs) embedded in a microstrip transmission line. The proposed BSF is designed with FSS unit cells modifying the cross-loop slots. The BSF is interpreted with an equivalent circuit model and a dispersion diagram. The center frequency (fo) of the BSF is 6.6GHz. Proposed filter increases the number of unit cell. As a result, 3dB bandwidth is wider and insertion loss is reduced. Also, Facbricated BSF exhibits uniplanar geometry, simple fabrication.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.18 no.3
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• pp.55-58
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• 2004

Recently the examples of a lighting design with LED source have increased rapidly, but there are few researches that are related to selecting luminous colors by LED. The research is that respondents operated color blender and got preference colors according to what they made, the colors were measured by chroma meter and marking CIE 1931 chromaticity diagram. Through the results of the research has made group preference for luminous colors. From now on, not only does it seem capable of using a designing a building-lighting to which LED but it will be actively applied to controlling with a digital technology for lighting design.

• Journal of the Society of Naval Architects of Korea
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• v.32 no.2
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• pp.68-74
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• 1995

The statistical analysis system is necessary to predict the resistance and powering performance quickly and precisely at the initial design stage. The authors propose the several functions of the performance prediction program and the structures of data bank. The program includes several series charts, regression coefficients and adapted regression analysis method based on the data bank to predict the resistance and propulsive coefficients. The calculation procedure to find out the principal dimensions and open-water efficiency of the optimum propeller is also included. The evaluation for the program and data bank is conducted by the arbitrarily selected 14 ship models. The results show good agreement with experiments within 5% mean prediction error.