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吳廉德,林海喆 弘益大學校 科學技術硏究所 1991 科學技術硏究論文集 Vol.1 No.-
We have introduced a query model for Object-Oriented Databases. An object class in Object-Oriented Databases consists of a specification part(Semantic property) and an implementation part. The specification part consists of the representation of semantics, associations, operations, rules and constraints, method, and inheritance. The implementation part of a class consists of procedures and functions. A Query in our query model returns subdatabases and derived attributes whose structure consist of some selected classes of objects and their semantic associations, i.e., it has the same structural characteristics as those of the original databases. The result of a query which is modeled by the same data model of the original databases in represented using Generalized relation and Statement structure. The G-relation provides a tabular representation of instances of a class, the used rule and constraints, the association type of the class, and the type of the instances of a class. The statement structure provides the association type of among the classes which consists of the resulting query.
吳廉德 忠州大學校 1994 한국교통대학교 논문집 Vol.29 No.2
In recent years the availability of databases and computer networks has given rise to a new field: distributed databases. The data which constitude the database are stored at the differnt sites of the computer network. In this paper, we explore failure handling for distributed DBMS. We propose how to extend recovery techniques for system failure. We must incorporate the distinction GR(Global Recover)and LR(Local Recover)into the Database Recover.
객체 지향 데이타베이스에서 퍼지 데이타 모델링에 관한 연구
吳廉德 忠州大學校 1996 한국교통대학교 논문집 Vol.31 No.2
In this paper, based on the concepts applied to existing relational data model, we incorporate the concept of fuzzy information in object oriented database and introduce rules to be applied. We deal with only indefinite information and numerical interval of various types of fuzzy information. In addition, to represent the degree of fuzzy, we suggest fuzzy information with certainty factor. An extended object-oriented data model is proposed for capturing fuzzy information. A storage structure to store fuzzy information is then defined. Hence, we expect information processing to be more closely related to the real world.
다중사용자 통신 환경을 지원하는 멀티미디어 머드 엔진 구조의 설계 및 구현
吳廉德 충주대 산업과학기술연구소 1999 産業科學論文集 Vol.7 No.1
This paper presented to develop a multimedia MUD(Muti User Dimension) game engine for multiuser through the information superhighway. The role of MUD engine is to control data obtained such as keyboard and mouse by input device. And MUD engine transformed the data into data suitable for output device. It displays monsters, items, player on screen in order to play the game. It also control background music and sound effect used in this game. In our research, Multimedia engine is make which is use to API function and WinG based on windows NT. It also needs database management module to supply data based on multimedia environment.
통합 바이오 정보 시스템을 위한 사용자 질의어 처리에 관한 연구
오염덕 忠州大學校 2004 한국교통대학교 논문집 Vol.39 No.1
We represent a relationships between entities having link relationship with semantic property. We design a biological data source to use an navigation structure for each biological data source in the integrating conceptual model. The extraction of the biological information indicates to find interesting domain by using meta rule to each biological data source. It results in a diminished range of the biological entity for information retrieval.
오염덕 忠州大學校 2002 한국교통대학교 논문집 Vol.37 No.3
The reverse compilation procedure recovers high-level code from executable programs at a higher representation language level than that produced by disassemblers; in fact, disassembly is a part of the first procedure in this compilation. We are propose about the analysis of the format of executable code and analysis of the control & data flow, and then, we should making some documentation including semantic information. The results of work have the followings : The extraction semantic contents in the executable code, Reusable source code for analysis the executable code.
멀티미디어 머드 엔진을 기반으로 하는 시각적 게임 진행 구조에 관한 연구
吳廉德 忠州大學校 1999 한국교통대학교 논문집 Vol.34 No.2
In this paper, tried to construct and design the game processing structure based on general multimedia MUD game engine in client/server system. Constructed environment consist of MUD game engine based on general scenario. But because it is not text form but multimedia form, it takes a long time to make engines and game processing structure for specific situation and to develop multimedia communication model
역공학 기법을 이용한 악성코드 분석 시스템에서 역컴파일러 설계 및 구현
吳廉德 충주대 2001 한국교통대학교 논문집 Vol.36 No.2
Reverse engineering of software systems has traditionally centered upon the generation of high-level ions or specifications from high-level code.In this paper, we suggest of the decompilation environment that aids in the understanding of the underlying malicious executable program. The reverse compilation process recovers high-level code from executable programs at a higher representation level than that Produced by disassemblers; in fact, disassembly is part of the first stage in this process.Reverse engineering of software systems has been defined as the analysis of a subject system to identify the system's components and their interrelationships, and to create a representation of the system in another form or at a higher level of ion.
吳廉德 충주대 2000 한국교통대학교 논문집 Vol.35 No.2
In Recently, the method of design needs the work to transform existing drawing made by hands into computer system environment.Most of drawing processing system until nowday is organized only to be able to store or load then information.We should know what contents is in drawing and whenever we want to know where some specific part is we should be able to find it through database. In this paper, DIRS(Drawing Information Retrieval System) construct based on relational data model.We consider to manage drawing information and to retrieval easily the drawing data.
객체 지향 데이타 모델에서 질의 처리 결과의 신뢰성 보장을 위한 퍼지 질의 연산 규칙의 설계
吳廉德,金鎭漢 충주대학교 1997 한국교통대학교 논문집 Vol.32 No.2
There are a lot of fuzzy information which can be used effectively in the real world.An object-oriented data model presents a possibility of information application of more diverse methods and areas such as CAD,OIS(Office Information System),and multimedia database. To represent the degree of incompleteness, we suggest fuzzy information with certainty factor. A query model is also proposed to efficiently process fuzzy information. The G-relation concept in OSAM can be used in OSAM to represent fuzzy information, association between instances in a class, and certainty factors (C.F) for each instance object. However the representations of object C.F,C.F between objects ,association using G-relation are not suitable for storing classes