• Proceeding of KASS Symposium
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• 2008.05a
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• pp.49-52
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• 2008

Structural Wood is developed by purpose to make efficient use of wood resources. The biggest advantage of structural wood is stable as strength is high than wood product that is used by structure in existing. Order manufacture according to design details is available. It Is used to main structure elements to large spatial structure. Structure wood kind utilizes Glulam, prefabricated wood I-joists and laminated veneer lumber(LVL) and so on. Structural Design and construction of Open-air Stage Roof Structure is described in the presented paper. Architectural roof materials is used to PVF/PFLT membrane. Column and diagonal members is used to steel members(SS400), and Cantilever beam is used to Glulam assembled with different Grade laminations(10S-28B).

• The Journal of Society for e-Business Studies
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• v.24 no.3
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• pp.53-71
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• 2019

As software systems become more complex and larger, software systems require a way to reuse software components or modules to provide new functionality. This paper designed a development method of web system combining SOA(Service Oriented Architecture) with MPSL(Multi-Software Product Line). According to provides SOA and MPSL, this paper suggested to service providers and service users to provide and reuse variable services. From the viewpoint of service provider, the suggested method identifies and implements reusable variable services as features by syntax-based, functional-based, and behavior-based methods applying feature identification guidelines and manages them as reuse assets. From the user's point of view, it is possible to develop a web system by constructing a service by workflow model as a method of structure and reconfigure services. As a result of measuring the reuse of the web system constructed in this paper by the function point, the cost reduction effect was verified by applying it to the similar project with the increase of reuse.

• Annual Conference of KIPS
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• 2012.04a
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• pp.514-517
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• 2012

최근 인터넷 사용자 증가와 네트워크를 기반의 응용 프로그램이 다양하게 개발되고 있다. 또한 스마트 폰과 매블릿 PC 의 대중화로 누구나 쉽게 인터넷을 통해 정보검색 서비스를 이용할 수 있다. 따라서 갈수록 증가하는 패킷에 대한 제]어와 이동, 삭제 등과 같은 처리를 빠르게 하기 위해 네트워크 프로세서 (Network Processor)가 개발되었다. 네트워크 프로세서는 패킷 제어와 이동, 삭제를 수행하는데 최적화되어 있다. 하지만 네트워크 프로세서를 개발한 회사마다 교차개발환경 툴과 개발언어가 서로 다르기 때문에 소스코드 재사용 및 확장이 어렵다. 또한 네트워크 프로세서에서 동작하는 프로그램을 매스트 하기 위해 하드웨어 장비가 필요하고 네트워크 프로세서에 종속적인 개발환경과 언어를 배우는 것은 프로그래머에게 큰 부담을 준다. 본 논문에서는 네트워크 프로세서에 최적화된 기능을 언어 레벨에서 정의한 eFlowC 언어를 사용하고 범용 컴퓨터에서 매스트 및 실행을 할 수 있는 가상머신을 제안한다. 그리고 가상머신 중간언어를 사용하여 가상머신이 설치된 범용 컴퓨터에서 소스코드 재사용 및 확장을 가능하게 한다. 따라서 범용 컴퓨터에서 프로그램 테스트를 통해 신뢰성 높은 프로그램을 작성할 수 있다.

• Journal of the Korea Institute of Military Science and Technology
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• v.5 no.1
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• pp.83-95
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• 2002

Thermal conductivity of ceramic fibrous insulator was analysed and predicted by using the modeling/simulation technique. Ceramic fibrous insulators are widely used as high temperature insulator on account of their lightweight mass and heat resisting properties. Especially it is suitable to protect the high speed aircraft and missiles from severe aero-thermodynamic heating. Thermal conductivity of ceramic fibrous insulator could be determined from the conductive heat transfer and the radiative heat transfer through the insulator. In order to estimate conductive thermal conductivity, homogenization technique was applied, while radiative thermal conductivity was computed by means of random number and radiation probability. Particularly radiation probability can make it possible to estimate the conductivity of fibrous insulator without any experimental constant. The calculated conductivity predicted in the present study have a reasonable accuracy with an average error of 7 percent to experimental data.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10a
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• pp.513-515
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• 1999

웹은 소규모 정보에서 대규모 서비스에 이르기까지 광범위한 영역을 가지고 다양한 서버와 분산된 작업흐름 시스템에 대한 전역적인 환경으로 발전되어 오고 있다. 웹을 기반으로 하는 애플리케이션은 플랫폼에 관계 없이 접근가능한 브라우저와 표준화된 문서환경을 제공하며, 최소의 비용으로 단시간에 개발과 유지보수가 용이하다. 이러한 장점은 구조적인 변화와 웹 기반 구현기술의 발전을 가져왔지만 대부분의 웹 애플리케이션의 생성은 체계적인 프로세스없이 개발자의 지식과 경험에 의존하여 임시적으로 개발되어 왔다. 따라서, 고수준의 추상화를 제공하지 않는 저수준 기술에 기반한 애플리케이션 개발을 개선하고 웹을 기반으로한 애플리케이션 구축에 적용가능한 컴퍼넌트기반 개발 프로세스를 제안한다. 또한, 웹 애플리케이션에 적용 가능한 컴퍼넌트를 개발하기 위해서 분석, 설계 모델링 방법으로 네비게이션 다이아그램을 사용한다. 이는 모델링을 위한 고수준의 추상화 정의를 가능하게 함으로써 역으로의 개발을 통한 유지보수가 가능하며 구현기술의 재사용성을 기대할 수 있다.

• Journal of the Korea institute for structural maintenance and inspection
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• v.9 no.2
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• pp.173-180
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• 2005

Metakaolin is a cementitious material for producing high-strength concrete. This material is now used as substitute for silica-fume. In this paper, we did the mechanical and durability test such as compressive/tensile/flexural strength test, chloride ion diffusion, chemical attack and repeated freezing and thawing, carbonation test. In the mechanical tests, 10~15% for binder is optimum substitute rate. And, in the chloride ion diffusion test, according to the increase of substitute of metakaolin & silica-fume for binder, the diffusion coefficient was more reduced. In the chemical attack test, by the filler effect of fine powder such metakaolin and silica-fume, the resistance is more excellent than normal concrete. In the other durability test, the concrete using metakaolin also compared with those of silica-fume substitute concrete. Through these tests, we recognized that metakaolin can be used as a substitute for silica-fume.

• The KIPS Transactions:PartD
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• v.10D no.5
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• pp.745-752
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• 2003

The component-based development methodology becomes famous as the reuse technology for independence and productivity of software development It is necessary component metrics for component-based systems, because It should be measurable to improve the quality of the software. Hence, in this paper, we propose component cohesion and coupling metrics which is reflected in characteristics of component. The operation use value is calculated by the information of classes interface commonly uses to offer the component's service. And, the operation similarity value is calculated by the operations use value. Component cohesion and coupling is calculated by the operation similarity and based of the information which is extracted in the analysis phase. And, we examine the necessity of component metrics in comparison with object-oriented metrics.

• Journal of the Korea Computer Industry Society
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• v.2 no.7
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• pp.933-944
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• 2001

In the process of software development, object-oriented framework enables directly improving the productivity of the developer through the reuse of code, analysis and design informations. object-oriented framework is a set of usable and expandable classes and their connectivity. It is a meta solution that contains the code to be reused in the framework and the expert design results on a specific area. This paper constructs the framework that extracts the common services of BBS, chatting, white board and ftp applications for internet-based remote education system. These services can be mostly reused within heterogeneous applications in the form of component.

• 한국HCI학회:학술대회논문집
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• 2008.02a
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• pp.595-600
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• 2008

본 논문에서는 위성영상 기반의 3차원 문화재 정보 시스템을 구현하기 위한 과정으로 고 해상 위성영상 제작을 위한 DEM(Digital Elevation Model)제작단계와 위성영상 자료를 수집하여 영상이 지니고 있는 왜곡을 보정하는 자료보정 단계, 사용 목적에 맞게 영상을 가공하여 저장하는 영상 생성단계를 통해 위성영상 기반의 3차원 지형정보를 생성하고, 3차원 스캐너를 활용한 대상지역 문화재의 DB 구축과 3차원 복원을 통해 3차원의 문화재 정보를 획득하고 질감 및 재질 사실적인 면을 강조하기 위한 텍스처 맵핑 과정을 통해 3차원 공간적인 조건 및 검색을 가능하게 함으로써 언제 어디서 든 누구나 쉽게 문화재에 대한 정보를 검색할 수 있도록 Web3D를 활용한 3차원 문화재 정보 시스템을 구현하였다.

• Journal of the Korea institute for structural maintenance and inspection
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• v.26 no.6
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• pp.139-147
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• 2022

In this study, we designed a high-strength, low-alkali type cement composite for artificial reef by mixing various binders and evaluated whether it is possible to manufacture it with an ME method 3D printer. As a result of the tests, it is found that it is important to control the water-binder ratio, the silica sand-binder ratio, and the type of silica sand in order to control the fluidity of the cement composites to enable 3D printing. The surface quality of 3D printer output can be achieved by adjusting the amount of viscosity agent added while obtaining printable fluidity. In the cement composites mixing proportion using the alpha-type hemihydrate gypsum, a setting control agent needs to be used to control the quick setting effect. It is also necessary to derive the time to maintain the fluidity, and to apply it when printing. To obtain the required strength, the mix proportion needs to be modified while satisfying the fluidity level of 3D-printable cement composites. In the present study, 3D-printable mix proportions were designed by the use of multi-component binders including alpha-type hemihydrate gypsum a for low-alkali type artificial reefs, and the printability was confirmed. A further study needs to be performed to quantitatively evaluate the alkali reduction effect.