• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
• /
• pp.430-433
• /
• 2007

Spatial information has recently been recognized as one of the major subjects of interest in information technology. With increasing variety and quantity of spatial data on the web, searching and maintaining these data are becoming a much focussed area of research. Interoperability is the key technology in solving the complexities of spatial data in web services. The problem of maintenance and searching of spatial data in an interoperable web service environment can be solved by establishing standardized metadata of spatial information. Then using the standardized metadata, catalog web services can be deployed for autonomous searching and binding of spatial data. This study investigates the international standard for spatial data metadata(ISO/TC211 19115) and deployed catalog web service based on this metadata. Various heterogeneous spatial data of Seoul Metropolitan region were then used for experimental implementation of catalog web service.

• 한국정밀공학회지
• /
• 제16권9호
• /
• pp.54-61
• /
• 1999

Three dimensional CAD data viewer helps a user to view and use many different types of CAD data without having costly programs that produced them loaded on their computers. A viewer for standard data formats such as STEP and IGES is more useful since most of the CAD systems provide translators for them. We developed a 3D CAD viewer for STEP AP203 solid and assembly data. In addition to the standard shading and assembly tree display, functions for 3D markups and measurement of distance and angles were implemented.

• Journal of Ship and Ocean Technology
• /
• 제9권3호
• /
• pp.33-42
• /
• 2005

As the networks connect the world, enterprises tend to move manufacturing activities into virtual spaces. Since different software applications use different data terminology, it becomes a problem to interoperate, interchange, and manage electronic data among heterogeneous systems. It is said that approximately one billion dollar has been being spent yearly in USA for product data exchange and interoperability. As commercial CAD systems have brought in the concept of design feature for the sake of interoperability, terminologies of design features need to be harmonized. In order to define design feature terminology for integration, knowledge about feature definitions of different CAD systems should be considered. STEP standard have attempted to solve this problem, but it defines only syntactic data representation so that semantic data integration is not possible. This paper proposes a methodology for integrating modeling features of CAD systems. We utilize the ontology concept to build a data model of design features which can be a semantic standard of feature definitions of CAD systems. Using feature ontology, we implement an integrated virtual database and a simple system which searches and edits design features in a semantic way.

• International Journal of Computer Science & Network Security
• /
• 제21권12호
• /
• pp.53-60
• /
• 2021

Many standard methods are used for secret text files and secrete short messages cryptography, these methods are efficient when the text to be encrypted is small, and the efficiency will rapidly decrease when increasing the text size, also these methods sometimes have a low level of security, this level will depend on the PK length and sometimes it may be hacked. In this paper, a new method will be introduced to improve the data protection level by using a changeable secrete speech file to generate PK. Highly Secure Data Encryption (HSDE) method will be implemented and tested for data quality levels to ensure that the HSDE destroys the data in the encryption phase, and recover the original data in the decryption phase. Some standard methods of data cryptography will be implemented; comparisons will be done to justify the enhancements provided by the proposed method.

• 한국군사과학기술학회지
• /
• 제19권6호
• /
• pp.744-751
• /
• 2016

Interoperability tests are required to determine whether network-based defense systems successfully share and exchange certain services, information, and data. We must examine various aspects of interoperability. The DITA (Defense Information Technical stAndard) is the basis for interoperability. However, DITA is being applied to the defense system in a state that the standard test methods and procedures are not established. And there is no test method and procedure of the DITA well applicable to military weapons systems or information systems. Therefore, in this paper, we propose a framework that includes procedures, methodologies, so as to test whether a standard is applied to the DITA in terms of Standard Conformance Test.

• 한국전자거래학회지
• /
• 제1권1호
• /
• pp.159-171
• /
• 1996

Nowadays, multimedia and Hypermedia become hot topics in information industry. Due to high capacity of media storage and fast communication network, it is possible to exchange text data as well as image, moving picture and voice. Especially to apply hypermedia under CALS standard environment, the relation between international standard and CALS standard needs to be considered. This study introduces conceptual background and processing model of HyTime (Hypermedia Time-based Structuring Language) which is a specification of hypermedia exchange, Hyper ODA (Hyper Open Document Architecture) which is a major multimedia communication basis, MMCF (Multimedia Communication Forum), AHM(Amsterdam Hypermedia Model), and DSRM(DAVIC System Reference Model) reference model which helps determination of hypermedia communication specification Although they are international standard, provisional standard or non-standard, it discusses the Possibility of adopting them as CALS standard. Hence, this paper chooses the best recommend for CALS among these models.

• 한국CDE학회논문집
• /
• 제9권1호
• /
• pp.19-26
• /
• 2004

It is not possible to exchange parametric information of CAD models based on the current version of STEP (Standard for the Exchange of Product model data). The designer intents are lost during the transfer of CAD models. To resolve this problem, the macro-parametric approach had been proposed. To enable this approach, a set of standard modeling commands has been defined. Errors or missing elements of the standard modeling commands can be discovered by implementing macro-parametric translators. But there is a limit to discover problems only by using translators. This paper proposes a method to verify the standard modeling commands by implementing a geometric modeler. First, each argument of a modeling command is verified. Second, the set of the standard modeling commands is applied to geometric modeling of commercially available product parts. For the geometric modeling, nine test models have been selected.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2011년도 춘계 학술논문 발표대회 1부
• /
• pp.187-189
• /
• 2011

Standard production unit system has been used as accumulated standard for the cost estimation of public construction projects. However, it is difficult to estimate reasonable cost due to adaptation of a uniform standard and reflect changes in the technology. The purpose of this study is to provide basic data for improvement of standard production unit system through the identifying problems and analysing its influence on enactment and/or revision work of standard production unit system.

• 한국공간정보시스템학회 논문지
• /
• 제2권1호
• /
• pp.91-107
• /
• 2000

지리 정보 시스템(GIS)은 대용량의 공간 데이타를 사용하며, 다양한 소프트웨어와 하드웨어상에서 구현된다. 이렇게 상이한 하드웨어, 소프트웨어, 운영체제상에서 공간 데이타들 간의 효율적인 데이타 교환이 불가능하다면 데이타 공유가 매우 어려울 뿐만 아니라 데이타의 중복 보관 및 관리로 인해 막대한 경제적 손실을 가져온다. 이와 같은 문제점을 해결하기 위해 국가 차원에서 지리 정보 시스템에 관해 국가 표준을 설정하고, 공간 데이타베이스를 구축하고 있는데 공통 데이타 교환 포맷으로 채택된 것이 SDTS이다. 본 연구에서는 국가 공통 데이타 교환 포맷인 SDTS 데이타의 디스플레이 및 삽입, 갱신, 삭제, 특정 영역의 데이타 추출 및 생성, 오류 검사 및 레포팅, SDTS 프로파일의 설정 및 검증 기능을 GUI(Graphic User Interface) 환경에서 제공하는 SDTS 데이타 관리 시스템을 설계 및 구현하고자 한다. 향후 GIS 산업이 계속 활성화되고. SDTS 데이타의 수요가 증가함에 따라 SDTS 데이타의 분석 및 신뢰성에 대한 요구가 커질 것이므로 본 연구에서 개발될 SDTS 데이타 관리 시스템의 필요성은 더욱 더 증대될 것이다.

• 한국산학기술학회논문지
• /
• 제22권6호
• /
• pp.477-483
• /
• 2021

군의 정비체계에서 표준정비인시는 정비부대의 정비능력을 판단하는 도구로서 정비 소요와 작업량을 결정하는 기준을 제공하고, 정비계획 수립의 기초 자료로 활용된다. 군 주요 장비의 평시 표준정비인시는 이미 선정되어 활용하고 있으나 전시 정비환경에서 표준정비인시는 미선정되어 이를 산출할 필요성이 제기되었다. 이는 전시에 정비 시설, 공구, 장비, 인력 등이 충분치 않고, 정비 목표와 수준이 평시와는 상이하므로 평시 표준정비인시를 직접 적용하는 것은 적절하지 못하기 때문이다. 따라서 본 연구는 전시 표준정비인시 산정을 위해 필요한 데이터를 수집·선별하는 과정과 기준을 제시하고, 표준정비인시 산출 프로세스에서 정비인시 분포의 특징을 분석하여 표준정비인시로서의 대푯값을 선정하는 방법을 제안한다. 제시되는 전시 정비인시 산출 프로세스는 먼저 전시 정비환경을 고려한 기준과 가정사항 등을 반영한 모델을 설계하고, 표준정비인시 도출의 통계적 기법을 결정하며, 전시와 유사한 환경의 평시 정비실적 데이터를 수집하여 기술통계 분석과 정비인시 분포를 추정 및 검증하고 최종적으로 대푯값을 제시하는 방법을 사용한다. 제안된 방법을 토대로 육군이 운용 중인 4개 주요 전투장비의 전시 표준정비인시를 도출하였으며, 해당 장비들의 정비인시 분포가 로그 정규분포를 따르고 있는 것으로 분석되어 신뢰성 있는 결과값을 제시하였다.