• 한국정밀공학회지
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• 제17권10호
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• pp.89-94
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• 2000

Engineering database for CIM of injection mold production has been developed to manage design information and parameters of injection mold. The database has direct connection with product data management system and management database. Design specifications are generated in initial stage of mold design with integration of management information. Design parameters and bill of materials for mold base parts are generated during the CAD process and transferred to the manufacturing database and procurement system. Standard modules for parts and mold base are constructed using national standard and legacy data of industries. The engineering database provides important information route for CIM of injection mold design and production.

• 산업공학
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• 제10권3호
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• pp.11-21
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• 1997

The communication between members who participate in the product development project has an effect on the project time, cost, and quality. This reason requires the engineering database which is the kernel of product information. This study focuses on data and process modeling for engineering database related to electronic consumer product. First, Through the definition of engineering database, the characteristics of engineering data, mainly product data are analyzed. Second, The object and class for engineering database are defined. This results of the study can be applied with engineering database design and workflow design of PDM. It also can be used as a reference model when the company develops product with suppliers.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2003년도 ISIS 2003
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• pp.102-105
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• 2003

"e-Leaning" system is classified by lecture time into two types, that is, "synchronous type" spent the same lecture time between the lecturer and students, and "asynchronous type" spent the different lecture time. The size of image database is huge, and there are some problem on the management of the lecture image database in "asynchronous type" e-Learning system. The one of them is that the time tag for the database management must be added manually at present, and the cost of the addition of the time tag causes a serious problem. To resolve the problem, we will use the character recognition for the characters written by the lecturer on whiteboard, and will add the recognized character as a keyword to the tag of the image database. If the database would have the keyword, we could retrieve the database by the keyword efficiently, and the student could select the interested lecture scene only in the full lecture database.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.1491-1496
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• 2009

Because of the development of advanced construction technology, the inner environments of building become more and more complicated, which may result in many problems. The administer may forget where they put up the certain picture, and search for it all over the building, or they underestimate the number of the visitors, and find the situation is out of control, while the pedestrian may get lost, and after making their efforts, they found they turned back to the origin point again. So it is very necessary to establish an indoor spatial database. On one hand, it is able to assist administrator to manage the property and human flow inside the building, on the other hand it could help the pedestrian find the way easily especially when they are not familiar with the building or there is an emergency. This paper focused on how to create the indoor spatial database including both static database and moving objects database. The static database is built on the basis of 3D building models, and the moving objects database gets information from many kinds of cameras and sensors installed in the building. And at the same time the paper discussed the practical use of indoor spatial database mainly in three aspects including consistency management, building restructure, and pedestrian navigation.

• 산업공학
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• 제17권2호
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• pp.226-232
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• 2004

In shipbuilding area, data sharing is one of the crucial issues. Recently, for collaborative design, ship structural CAD systems adopt the database as its primary storage. Database is useful to deal with the large amount of design information among the heterogeneous design department and design stage. To make the database-based CAD system object-oriented database(OODB) and object-relational database(ORDB) can be used. It is important to select proper database because the CAD system performance mainly depends on access performance of database. In this research, using prototype CAD system from other research, access performance of OODB and ORDB form CAD system was evaluated. STEP application protocol was used as the database schema and experiment was made in query by property and query by region. The results give some idea of how to choose the database for CAD systems.

• 한국컴퓨터정보학회논문지
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• 제28권7호
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• pp.131-143
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• 2023

미래 지식의 사회에서는 비즈니스 데이터의 중요성이 증가할 것으로 예상되며, 기업이 제품을 제조하거나 서비스를 개발하기 위한 원재료로 인식되고 있다. 데이터의 중요성이 증가하면서 데이터베이스 자산의 경제적 가치를 판단하는 연구도 이루어지고 있다. 그러나 기존 연구는 데이터베이스 자산의 특성이 충분히 반영되지 않았다. 이에 본 연구에서는 데이터베이스 자산의 특성을 고려하여 데이터베이스 자산을 수익형, 비수익형과 공공재형 데이터베이스 자산으로 분류하였다. 또한, 수익형 데이터베이스 자산은 기존 기술가치평가와 유사하게 가치를 판단하는 것이 가능함에 착안하여, 기업의 위험 조정 할인율을 내포하는 데이터베이스 자산의 수명 산출 방법을 개발하였다.

• Journal of information and communication convergence engineering
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• 제17권2호
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• pp.149-160
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• 2019

Web applications typically interact with databases. Therefore, it is very crucial to understand which web components access which database resources when maintaining web apps. Existing research identifies interactions between Java web components, such as JavaServer Pages and servlets but does not extract dependencies between the web components and database resources, such as tables and attributes. This paper proposes a dynamic analysis of Java web apps, which extracts such dependencies from a Java web app and represents them as a graph. The key responsibility of our analysis method is to identify when web components access database resources. To fulfill this responsibility, our method dynamically observes the database-related objects provided in the Java standard library using the proxy pattern, which can be applied to control access to a desired object. This study also experiments with open source web apps to verify the feasibility of the proposed method.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2007년도 정기학술발표대회 논문집
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• pp.301-305
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• 2007

대부분의 상용 데이터베이스 관리시스템은 관게형 데이터베이스 (relational database) 기술에 기반하고 있다. 그러나, 객체지향언어인 EXPRESS로 정의된 IFC(Industry Foundation Classes)를 일반적으로 많이 사용되는 관계형 데이터베이스로 매핑하려면 서로 구조가 달라 미핑과정이 매우 복잡해진다. 한편 IFC를 객체기반 데이터베이스(object-oriented database)나 객채관계형 데이터베이스(object-oriented relational database)와 같은 객체기반의 데이터베이스로 매핑하게 되면 그 과정이 비교적 단순해지고, 많은 장점을 가질 수 있다. 본 연구에서는 장기적으로 IFC와 객체기술에 기반한 통합정보교환기술을 실용화하기 위하여 먼저 관계형, 객체지향형 데이터베이스의 개념에 대해 살펴보고, IFC를 객체관계형 데이터베이스로의 매핑방법에 대하여 알아본다.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2008년도 정기 학술대회
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• pp.518-523
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• 2008

In this study, we analyzed applicability of object database, designed the concept model based on object-oriented idea for measurement data management, and applied the design model to object database. The concept model composes three sub models Infrastructure managing information model, Infrastructure measurement data model, and Measurement unit model. The process to expand measurement data of new type was executed easily without changing database schema in object database. The process to expand measurement data of new type was executed easily without changing database schema in object database. Therefore, applicability of new technology to infrastructures for building a safety management network of road bridges could be increased with object database system.

• 산업경영시스템학회지
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• 제26권3호
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• pp.1-9
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• 2003

Databases are central to business information systems and RDBMS is most widely used for the database system. Normalization was designed to control various anomalies (insert, update, delete anomalies). However, normalized database design does not account for the tradeoffs necessary for performance. In this research, I model a database design method considering denormalization of duplicating attributes in order to reduce frequent join processes. This model considers response time for processing each select, insert, update, delete transaction, and for treating anomalies. A branch and bound method is proposed for this model.