• Journal of Korean Association for Spatial Structures
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• v.11 no.3
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• pp.5-11
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• 2011

• Journal of the Korea Institute of Building Construction
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• v.9 no.6
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• pp.161-168
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• 2009

In an architectural construction, underground construction is a critical path forming a major part of the total construction period and cost, and particularly in big cities, its size has been increasing every year. A basement wall currently constructed in the field needs a large functional work force, and the construction is under progress by the Euroform and Soldier system, which is disadvantageous in terms of the construction period. Therefore, in this research, non-supporting forms which are applicable to the buildings construction were developed, based on the non-supporting forms partly used in some civil engineering works. In addition, the size of a form was assumed and its economical efficiency was compared to that of the Euroform and Soldier system which is used most in construction fields, and the results were analyzed. The study results showed that the construction cost of composite non-supporting forms was higher than that of the Euroform and Soldier system by about 8%, and the construction cost of non-composite non-supporting forms were lower than that of the Euroform and Soldier system by about 9%. However, in the case of composite non-supporting forms, the amount of concrete and reinforcing rods remarkably decreased in structural construction, so it has the effect of an economical cost reduction compared to the construction cost of existing walls by about 35%

• Journal of the Korea Institute of Building Construction
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• v.9 no.4
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• pp.111-117
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• 2009

Considering the entire critical path, underground works in construction projects occupy a large part of the total construction period, as well as a large part of the construction costs. Particularly in the downtown area, the scale of underground work has been increasing every year. Currently, underground retaining walls, which are built at construction sites, require many skilled workers, and the works are being undertaken by means of the Euroform+Soldier system, which is quite disadvantageous in terms of the construction period. In order to complement this, forms made of new materials and new construction methods have been developed. Now more than eyer, the shortening of construction periods and the reduction of construction costs is required. Considering this, in this study, the researcher has tried to compare the Euroform+Soldier system, which has been the system most frequently used on construction sites, to the non-supporting form system, which has been used on the sites of civil engineering work. The results of the research revealed that although the Euroform+Soldier system was advantageous from the perspective of material costs, it was disadvantageous in terms of labor costs. It is thought that an additional study on a method for reducing the material costs is required, so as to revitalize the application of non-supporting forms to the construction site.

• The Journal of the Korea Contents Association
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• v.9 no.5
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• pp.61-75
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• 2009

Generally, the development of the database application includes the requirement analysis phase of creating ERD (Entity Relationship Diagram) and process models, coding, and testing. From the above phases, the analysis phase is not most formalized. It is usually hard task because (1) customers don't know the details of the desired system; (2) developers can't with ease understand the business logic of the customers; (3) the outcomes of the analysis, which are ERD and process models, are not easy to understand to the customers. This paper propose that the executional forms, which are better to understand the systems, should be presented to the customers instead of the ERD. These forms should accept the data input so that customers can review the various aspects of the outcome models. The developers should be able to instantly implement the business logic and also should be able to visually demonstrate the logic in order to get the details of it. For this goal, the customer supplied business logic should be able to be implemented by the references between forms, actions, constraints from the perspective of the data flow. The customers try to execute the forms implementing the business logic and review their supplied logic find new necessary business logic of their own. Iterating these processes for the requirement analysis would result in the success of the analysis which is sufficiently detailed without conflicts.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.04a
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• pp.601-604
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• 2008

When the concrete is placed, the water, needed for hydration of the cement, is under 30% of W/C including bound and gel water. However, as minimum water content cause bad workability, the W/C have to be higher. Therefore, fresh concrete produce 10${\sim}$20% extra water. As those water remain entrapped air in the concrete, life of the structure is reduced because of the degradation caused by entrapped air. For that reason, if extra water is eliminated, it will be great to improve the durability of the structures. Therefore, this study was performed to verity the fundamental properties through the experiment on the dewatering system using the euro form for eliminating extra water. When the dewatering form was applicated, the compressive strength was increased by 16% than those of normal form. However, the increasing rate of compressive strength got lower as the height is higher. In terms of ultrasonic pulse speed and surface roughness, the dewatering form showed better results than the normal one.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10b
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• pp.562-564
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• 1999

래디오시티 렌더링 시스템에 적합한 모델링을 하는데 있어서 수작업을 비롯한 기존의 여러 방법을 적용해 본 결과, 제작하고자 하는 환경 설정에 많은 어려움을 겪었다. 본 논문은 이러한 문제를 해결하기 위해, 인크리먼털 컨벡스 헐 모델링 기법을 응용하여 시스템을 개발하였다. 이 시스템은 기본 데이터 정보를 입력하면 자동적으로 패치와 엘리먼트가 생성되는 프로그램으로, 물체가 많은 환경이나 곡면을 비교적 쉽고, 고속으로 표현할 수 있었다. 그리고 인크리먼털 컨벡스 헐 알고리즘으로 생성된 환경에, 폼 팩터의 대표적인 세 가지 알고리즘들을 비교.평가 해본 결과 Cubic-Tetrahedron 알고리즘이 가장 효율적이었음을 알 수 있었다.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.11b
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• pp.55-58
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• 2002

SOAP(Simple Object Access Protocol)은 분산 환경에서의 정보 교환에 사용되는 분산 컴퓨팅 프로토콜로 분산 시스템간에 메시지를 전달하는 방법과 원격 프로시저 호출/응답을 처리하는 방법 등이 정의되어 있다. 이러한 SOAP는 텍스트 기반 XML을 프로토콜로 사용하고 있기 때문에 하드웨어 플렛폼과 운영체제 및 프로그래밍 언어에 독립적으로 사용할 수 있다. 따라서 전자상거래 표준을 위한 ebXML에서도 메시지 전송을 위해 SOAP을 사용하고 있다. 본 논문에서는 SOAP을 기반으로 XML Hub 시스템을 개발하였다. 이에 따라 본 XML Hub시스템을 기반으로 B2B 메시지 전송이 용이하게 되어, 보다 많은 비즈니스 파트너를 효과적으로 통합 관리할 수 있을 것이다.

• Proceedings of the CALSEC Conference
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• 1998.10a
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• pp.287-300
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• 1998

인터넷 사용자의 폭발적인 증가와 더불어 웹을 이용한 전자상거래가 활성화되고 있다. 웹기반 전자상거래시스템은 웹데이터베이스를 이용하여 구축되는데 전자상거래 정보의 효과적인 분석을 위해 데이터마이닝기법이 요구되고 있다. 본 논문에서는 전자상거래 마이닝의 개념을 살펴보고 효과적인 전자상거래 데이터마이닝을 위한 웹데이터베이스시스템을 제안하고 그 프로토타입을 구현하였다. 본 논문에서 제안한 웹데이터베이스는 전자상거래 자체의 내용정보를 저장하는 구조화 데이터 DB와 전자상거래의 사용자 인터페이스를 저장하는 HTML 폼 DB로 나뉘어 전자상거래 자체의 내용정보 뿐 아니라 접속횟수, 접속시간, 원격접속지 등 사용자 인터페이스에서 추출할 수 있는 정보까지 마이닝 대상정보에 포함시켜 효율적인 마이닝환경을 제공할 수 있다.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.11b
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• pp.363-367
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• 2002

일반 중소기업들의 업무는 수작업으로 데이터를 유지하고 있는 수준에 머물고 있는 실정이다. 인건비를 포함한 제반비용의 절감과 업무능률의 향상이 필요하다. 데이터 관리 및 유지를 위해서 효율적이고 신속 정확한 작업처리를 위해 데이터 베이스를 이용한 통합 자원관리 시스템이 구축이 필요하다. 이 프로젝트는 업무 효율을 높이기 위하여 데이터 베이스를 이용한 통합 관리 시스템을 개발하고 용이한 자료 추출을 위한 자료추출 엔진 및 출력 폼 개발 및 Network구성을 통한 분산환경에서의 사무자동화 구현을 목표로 개발하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.04a
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• pp.419-422
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• 2002

현재 대표적인 OS 인 Window, Unix, Linux에 관계없이 클라이언트와, 서버의 OS 에 상관없이 원격으로 관리할 수 있는 시스템을 개발하고자하는데 그 목적을 두었다. 즉 클라이언트가 Linux상에 돌아가고 서버가 Window 에서 돌아가는 시스템에서 Window 의 자원을 클라이언트가 Linux 상에서 쓰고 제어할 수 있고 그 반대로 Linux의 자원을 Window에서 쓸수있음을 제시한다.