• 한국정보처리학회논문지
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• 제6권8호
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• pp.1989-1999
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• 1999

최근 들어 WWW(World Wide Web)와 데이터베이스의 통합 문제가 큰 관심이 되고 있다. 본 논문에서는 WWW와 데이터베이스 시스템을 연동하기 위하여 기존의 서버나 클라이언트를 변경하지 않고 그대로 이용할 수 있는 새로운 방법으로서 CGI(Common Gateway Interface) 방식에 기반을 둔 UCM(United CGI Management) 시스템을 제안한다. CGI 방식 중에서 CGI 실행 방식은 데이터베이스에 접근할 때마다 CGI 프로그램을 실행시키기 때문에 데이터베이스에 대한 많은 동시 요구가 발생될 경우에는 시스템 성능이 크게 저하된다. 하지만 UCM 시스템은 데몬 방식인 통합된 CGI를 사용하여 이러한 CGI 실행 방식의 문제점을 개선한다. 또한 제안된 시스템은 DBMS(DataBase Management Systems)를 통하지 않기 때문에 SQL 언어를 사용하지 않으며 WWW 데이터베이스를 더 경제적인 비용으로 이용할 수 있다. 본 논문에서는 WWW 데이터베이스 인터페이스를 구축하기 위해 확장된 HTML 태그를 정의하고 데이터베이스로의 접근을 위해 EXODUS 저장 관리자(storage manager)를 사용한다.

• 한국데이타베이스학회:학술대회논문집
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• 한국데이타베이스학회 1999년도 춘계공동학술대회: 지식경영과 지식공학
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• pp.161-171
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• 1999

Query language has been widely used as a convenient tool to obtain information from a database. However, users demand more intelligent query processing systems that can understand the intent of an imprecise query and provide additional useful information as well as exact answers. This paper introduces a meta-database and presents a query processing mechanism that supports a variety of intelligent queries in a consistent and integrated way. The meta-database extracts data abstraction knowledge from an underlying database on the basis of a multilevel knowledge representation framework KAH. In cooperation with the underlying database, the meta-database supports four types of intelligent queries that provide approximately or conceptually equal answers as well as exact ones.

• 한국인공지능학회지
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• 제1권1호
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• pp.1-3
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• 2013

This study suggested ways to control UML diagram and to make design of database and to retrieve diagram information by giving questions. The study classified elements of the diagram. For instance, class diagram was made of classes, and class was done of class name and attribute operator. The elements were transformed to be database table having basic key and foreign key information. The ways suggested had advantages of users' sharing of model information and reuse of the model. This study investigated cost saving, time saving and UML model construction by database. We had designed integrated and relation database that could save and manage UML diagram, and suggested retrieval. For instance, we classified class diagram into elements to make tables and kept relation of each element by using not only basic key of relation database but also foreign key information. We made database of modeling depending upon methods to give users convenience.

• 한국측량학회지
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• 제19권1호
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• pp.55-66
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• 2001

현대도시는 여러 가지 원인으로 인하여 각종 재해가 발생하고 있다. 또한 재해의 발생 빈도가 증가하고 대형화되고 있는 시점에서 이들을 효과적으로 대처하기 위한 재해관리시스템이 필요하게 되었다. 이를 위해 본 연구에서는 급격한 차량의 증가로 인해 도시생활에서 가장 큰 재해로 지적되고 있는 교통사고와 사고발생 시 대형재해를 일으키는 가스재해 및 유지 보수의 중요성이 커지고 있는 교량 재해를 중심으로 데이터베이스를 구축하였다. 이에 본 연구는 실시간 정보의 제공을 가능케 하는 무선 인터넷 GIS를 이용하여 재해발생 시 현장에서 재해관리 데이터베이스에 접근하고, 신속하게 현장정보를 확인하여, 재해상황에 효과적으로 대처하며, 즉시 재해정보를 수정, 갱신할 수 있는 재해관리시스템을 개발하였다.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1996년도 춘계공동학술대회논문집; 공군사관학교, 청주; 26-27 Apr. 1996
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• pp.189-189
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• 1996

• 한국경영과학회지
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• 제24권1호
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• pp.99-117
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• 1999

Since query language is used as a handy tool to obtain information from a database, a more intelligent query answering system is needed to provide user-friendly and fault-tolerant human-machine Interface. Frequently, database users prefer less rigid querying structure, one which allows for vagueness in composing queries, and want the system to understand the intent behind a query. When there is no matching data available, users would rather receive approximate answers than a null information response. This paper presents a knowledge abstraction database that facilitates the development of such a fault-tolerant and intelligent database system. The proposed knowledge abstraction database adepts a multilevel knowledge representation scheme called the knowledge abstraction hierarchy(KAH), extracts semantic data relationships from the underlying database, and provides query transformation mechanisms using query generalization and specialization steps. In cooperation with the underlying database, the knowledge abstraction database accepts vague queries and allows users to pose approximate queries as well as conceptually abstract queries. Specifically. four types of vague queries are discussed, including approximate selection, approximate join, conceptual selection, and conceptual Join. A prototype system has been implemented at KAIST and is being tested with a personnel database system to demonstrate the usefulness and practicality of the knowledge abstraction database in ordinary database application systems.

• 대한조선학회논문집
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• 제51권1호
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• pp.51-57
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• 2014

In the KIOST MOERI model ice basin, a lot of experiments to find the material properties of model ice and model ship tests are being performed. And therefore many data information was produced, yet it was saved as excel data format. In order to manage and use the data more effectively and systematically, a proper database management is required. To make realistic engineering DBMS(database management system), understanding of test process, the usage of data, design of data schema and computer language and system management are required. In this paper, basic design process and usage of DBMS based on network and multiple user concept is introduced.

• 대한산업공학회지
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• 제41권2호
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• pp.162-172
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• 2015

This paper proposes a Product Data Management (PDM) system architecture that supports end-user computing for small and medium businesses (SMBs) in Korea to build and maintain efficient and sustainable information systems for their product development. Its open database with relational tables enables existing common application programs such as Microsoft office suites to access product data in PDM systems. In addition, the interactive query processor provided by database management systems helps design engineers to build ad hoc queries in standard SQL database language to response different data requirements during their product development. The PDM architecture with the open database allows design engineers or technical staffs in SMBs to build and maintain their application programs for product development by themselves. To show the feasibility of the proposed architecture, this study implemented a prototype PDM system based on the architecture and database, and represents real-world product data with the implemented PDM system.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2003년도 춘계학술발표회 논문집
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• pp.285-290
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• 2003

This study is aimed at standardizing the process of spatial database construction and developing a software tool for process management. Knowhow of five GIS firms and provisions of NGI(National Geography Institute) were analyzed. In this study, the process of spatial database construction was standardize. The system from this study has the capability to manage the process of construction database using GIS and to deal with the metadata of unit map, generated from the process, systematically and continuously The process was also shown by using either Gantt chart or PERT chart after developing an interface for "MS Project". A software "Visual Basic for Application" was used for this study.

• 한국건설관리학회논문집
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• 제5권4호
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• pp.79-86
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• 2004

One of the most difficult tasks in pavement management information systems is establishing the links between performance measures of a structure and the design and construction inputs. In-situ pavement performance can be considered a response variable to many project input variables, such as design, construction, and traffic loading effects. If we are to fully understand the component of pavement performance and specify the inputs through design and construction specifications to achieve that performance we must develop quantitative relationship between input and response variables through a scientific, fully integrated Pavement Performance Analysis System (PPAS). Hence, the objective of this study is to design a database model required for developing an effective database template that will allow analysis of pavement performance measures based on design and construction information linked by location. In order to select the most appropriate database model, a conceptual database model (Entity Relationship Model) and dimensional model, which is believed to be the most effective modeling technique for data warehouse project, are designed and compared. It is believed that other state highway agencies could adopt the proposed design strategy for implementing a PPAS at the discretion of the state highway agencies.