• Title/Summary/Keyword: Database Structure

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Research of organized data extraction method for digital investigation in relational database system (데이터베이스 시스템에서 디지털 포렌식 조사를 위한 체계적인 데이터 추출 기법 연구)

  • Lee, Dong-Chan;Lee, Sang-Jin
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.22 no.3
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    • pp.565-573
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    • 2012
  • To investigate the business corruption, the obtainments of the business data such as personnel, manufacture, accounting and distribution etc., is absolutely necessary. Futhermore, the investigator should have the systematic extraction solution from the business data of the enterprise database, because most company manage each business data through the distributed database system, In the general business environment, the database exists in the system with upper layer application and big size file server. Besides, original resource data which input by user are distributed and stored in one or more table following the normalized rule. The earlier researches of the database structure analysis mainly handled the table relation for database's optimization and visualization. But, in the point of the digital forensic, the data, itself analysis is more important than the table relation. This paper suggests the extraction technique from the table relation which already defined in the database. Moreover, by the systematic analysis process based on the domain knowledge, analyzes the original business data structure stored in the database and proposes the solution to extract table which is related incident.

Dynamic Characteristics Analysis of an Escalator Using a Computer Model (전산모델을 이용한 에스컬레이터의 동특성 해석)

  • Park, Chan-Jong;Kwon, Yi-Sug;Park, Tae-Won
    • Journal of the Korean Society for Precision Engineering
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    • v.16 no.4 s.97
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    • pp.95-101
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    • 1999
  • In this paper, we propose a dynamic model of an escalator which can be used to build a design database. The model permits to estimate the forces applied to the structure by calculating three primary types of forces; the torque required to operate the escalator, the reaction forces at part interconnection points, and contact forces between parts. These forces can then be used to calculate dynamic stresses in the structure which is required to estimate the durability of the structure. Result of the computer model are compared with testing results. This simulation model is used to construct a design database. So when we design a new escalator, this design database can be used to make a new simulation model which makes it possible for us to do a Knowledge-Based-Design.

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A Representation of Engineering Change Objects and Their Integrity Constraints Using an Active Object-Oriented Database Model (능동형 객체지향적 데이터베이스 모텔을 이용한 설계변경 개체 및 제약조건의 표현)

  • 도남철
    • Journal of Information Technology Applications and Management
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    • v.10 no.1
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    • pp.111-125
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    • 2003
  • This paper proposes a product data model that can express and enforce integrity constraints on product structure during engineering changes (ECs). The model adopts and extends an active object-oriented database model in order to Integrate IC data and their integrity constraints. Tightly integrated with product structure, It will enable designers to maintain and exchange consistent EC data throughout the product life cycle. In order to properly support operations for ECs, the model provides the data, operations, and Event-Condition-Action rules for nested ECs and simultaneous EC applications to multiple options. in addition, the EC objects proposed In the model integrate the data and Integrity constraints into a unified repository. This repository enables designers to access all EC data and integrity constraints through the product structure and relationships between EC objects. This paper also describes a prototype product data management system based on the proposed model In order to demonstrate its effectiveness.

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Index Graph : An IR Index Structure for Dynamic Document Database (인덱스 그래프 : 동적 문서 데이터베이스를 위한 IR 인덱스 구조)

  • 박병권
    • The Journal of Information Systems
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    • v.10 no.1
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    • pp.257-278
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    • 2001
  • An IR(information retrieval) index for dynamic document databases where insertion, deletion, and update of documents happen frequently should be frequently updated. As the conventional structure of IR index is, however, focused on the information retrieval purpose, its structure is inefficient to handle dynamic update of it. In this paper, we propose a new structure for IR Index, we call it Index Graph, which is organized by connecting multiple indexes into a graph structure. By analysis and experiment, we prove the Index Graph is superior to the conventional structure of IR index in the performance of insertion, deletion, and update of documents as well as the performance of information retrieval.

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A Transformation Military Databases based on the Relational Data model into XML Databases (관계형 데이터 모델 기반 군사용 데이터베이스의 XML 데이터베이스로의 변환)

  • Kim, Chang-Seok;Kim, Eong-Su
    • Journal of National Security and Military Science
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    • s.1
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    • pp.269-310
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    • 2003
  • AS Extensible Markup Language(XML) is emerging as the data format of the Internet era, there are increasing needs to efficiently transform between database and XML documents. In this paper, we propose a schema transformation method from relational database to XML database. To transform the schema, we represent input schema as Entity-Relationship diagram. Entity-Relationship model translator scans the input Entity-Relationship diagram using BFS (breadth First Search) and translates the diagram into hierarchical structure model. The XML Schema generator produces XML Scema code using the transformed hierarchical structure model. The proposed method has a merit that having reusability facility of XML Schema property in comparison with existing researches.

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The Method of Creating the Road Network Database for an Integrated Road Management System (도로관리 종합정보 시스템을 위한 도로망 데이타베이스 구축방안)

  • 김충평;이강원;김경희
    • Spatial Information Research
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    • v.3 no.1
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    • pp.55-63
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    • 1995
  • The database design, which logically sets the base structure and orga¬nization of the database, is performed by considering the users requirement, the relations between various data, and the relations between data and application field.The road network data must be created to have geometrical topological structure, because various data elements are needed to recognize the state of each section and to relate between data element. In this study, we propose a method of creating the road network database for an integrated road management system.

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The Analysis of the Important Problems on Designing and Constructing Earth Retaining Structures (지반굴착 흙막이 구조물 설계 및 시공시 중요문제점 분석)

  • Lee, Song;Kim, Ju-Hyun
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.6 no.2
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    • pp.167-174
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    • 2002
  • Earth retaining structure is constructed structure in order to construct a multistoried building, the subway, a subterranean downtown for effective use and obtainments of the limited ground. Recently, many kinds of research have been actively developed for a standardization and a database on designing and constructing of bridge, tunnel, road. With the works of database construction of that, many kinds of data with respect to statistics is cumulated. However, Database work of designed and constructed earth retaining structure in the construction field is wholly lacking and lagged behind in the works of database construction. This paper suggested classification system on indication data in connection with designing and constructing earth retaining structures a hundred fields. On the basis of that, code work with classification system was practised and DB program of indication data in connection with designing and constructing earth retaining structures was developed.

The Design and Implementation of Meta database and manager (메타 데이타베이스와 관리기의 설계 및 구현-통계 데이타베이스를 중심으로)

  • Ahn, Sung-Ohk
    • The Journal of Natural Sciences
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    • v.8 no.1
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    • pp.109-114
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    • 1995
  • For effective management of statistical database, statistical summary information must be provided by accessing directly the precomputed summary data from summary database to store and manage meta database for supporting statistical analysis and providing users with statistical summary information. In order to support effectively the use of summary database, we do the design and implementation of meta database and manager having a hierarchical structure as a data dictionary/directory and operation method is presented.

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Development of BIM-based Construction Document Information Database Structure through the Link to the BIM Model and Construction Document Information (설계모델과 문서정보의 효율적 연계를 위한 BIM기반 데이터베이스 체계 구축방안)

  • Lee, Donggun;Cha, Heesung;Kim, Kyungrai;Shin, Dongwoo
    • Korean Journal of Construction Engineering and Management
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    • v.16 no.5
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    • pp.42-53
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    • 2015
  • Construction industry has the form of industry progressed through mutual cooperation among participants in various fields. Accordingly, it may be referred to as an aggregate of information where various pieces of information are generated and managed according to each construction phase. Most of the information on the construction project is issued in the form of a document. And document management of the site is critical to successful execution of the project. Therefore, in the construction site to use IT technology for efficient information management. But, most of the information on the construction site is managed by the non-structured document. and Information management in the construction site is difficult to lack of information management systems. In this study, proposed construction information database structure and breakdown structure to the information management of the construction site through the BIM technology. Therefore, previous studies were reviewed about the document management and information link management. and Space breakdown structure and information breakdown structure was proposed to structure the information of the construction site and Database for information storage is designed. And, BIM-based construction information database was examined through the application scenario.

A Storage Structure of Geometric Data with Detail Levels

  • Kwon, Joon-Hee;Yoon, Yong-Ik
    • Proceedings of the IEEK Conference
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    • 2002.07a
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    • pp.66-69
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    • 2002
  • This paper proposes a new dynamic storage structure and methods fur geometric data with detail levels. Using geometric data with detail levels, we can search geometric data quickly. However, the previous structures for detail levels form the bottleneck in the design of database and do not support all types of geometric data with detail levels. Our structure supports all types of geometric data with detail levels. Moreover, our structure does not form bottleneck in the design of database. This paper presents the structure and algorithms for searching and updating of geometric data with detail levels. Experiments are then performed.

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