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石尙基 서울産業大學校 1983 논문집 Vol.18 No.1
One of the important things in constructing Compilers for any High-Level Languages is specifying the semantics for Parameter Transmissions between the calling and the called program. This paper shows the four kinds of Parameter Transmission Mechanisms, i.e., Call-by-Reference, Call-by-Value, Copy-Restore-Linkage, and Call-by-Name and tested these mechanisms using the various High-Level Languages such as COBOL, FORTRAN, PL/I, PASCAL, RPG and ALGOL. The result of the experiment is showing the importance of the semantics of Parameter Transmission Mechanism and identified to have to use the parameters carefully when a programmer writes subprograms
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석상기,이의소 한국섬유공학회 1978 한국섬유공학회지 Vol.15 No.1
Polyester core/cotton sheath core-spun yarns were produced on a conventional ring spinning frame. Effects of filament tension between tension devices and front rollers, spindle speeds, front top roll weights, and twists on tensile properties and covering conditions of core-spun yarns were studied. And also core-spun single yarns and sewing threads made from each of medium and high tenacity polyester filaments were compared. Increasing the filament tension resulted in better covering conditions. Less twists gave a better covering condition and worse imperfections on yarn. With the high tenacity filament, a stronger and less extensible core-spun single yarn and sewing thread were produced. Core-spun sewing threads made of medium and high tenacity filament showed a good evenness and a low shrinkage.
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石尙基 서울産業大學校 1984 논문집 Vol.20 No.1
The recent application of the on-line system to all the bank businesses has led to the total banking on-line system. Various troubles caused from the on-line system are unavoidable, and demand an importance of rapid recovery system. This thesis examines and analyzes in multi-angles possible categories of troubles at the operation of banking on-line system, and presents their proper recovery system. and simultaneously shows the methodology of file recovery for the maintenance of exact files through case studies on them.
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石尙基 서울産業大學校 1986 논문집 Vol.24 No.1
To develop the knowledge-based data base similar to human intelligence, applied the predicate logic (Horn clause) to data base. In this thesis, the data base is described, represented, organized with the fact, rule - especially integrity rule based relation of horn clause form and the way of data acquisition is suggested.
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객체 지향 멀티미디어 데이터베이스 모델하에서의 다중 키워드 검색 기법에 관한 연구
석상기,김경창,김기용 한국통신학회 1993 韓國通信學會論文誌 Vol.18 No.8
본 논문에서는 객체 지향 멀티미디어 데이타베이스 모델 하에서 다중 키워드를 이용한 검색 기법을 제안하였다. 멀티미디어 데이타 검색에서의 부분 매칭 문제점을 가급적 줄이기 위한 다중 키워드 등록 띤 검색알고리즘을 개발하였으며, 이를 위해 적절한 탐색 테이블의 저장 구조를 설계하였다. 또한 미디어 데이타 화일을 B+ 트리로 구성하여 검색 시간이 일정하도록 하였다. This paper presents the Multiple Keyword Retrieval Method under the Object-Oriented Multimedia Database Model. The multiple keyword registration and retrieval algorithms are developed to reduce the partial matching problem in multimedia data retrieval. For this, proper storage structures of the lookup tables are designed. And also, in order to maintain the constant retrieval time, media data files are organized with B+ tree structure.
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이미지 데이타베이스를 위한 확장 객체 지향 데이타 모델
석상기 서울産業大學校 1996 논문집 Vol.43 No.1
데이타베이스 시스템은 대량의 데이타로부터 필요한 정보를 얻기 위한 편리한 방법을 제공해 왔다. 모든 정보를 쉽게 이용할 수 있었으며, 데이타와 의미간의 매핑이 간단하였다. 그러나, 멀티미디어 데이타의 이용이 증가하면서 데이타와 의미간의 매핑이 분명하지 않은데 대한 새로운 데이타 형식이 필요하게 되었다. 이미지, 비디오 및 그래픽 등과 같은 비 알파뉴메릭 데이타에는 완전하고 정확한 양식으로 정량화하기에는 어려운 정보가 많다. 본 논문에서는 이미지 데이타에 내포되어 있는 의미상의 정보에 관한 문제점을 다루었다. 이미지 데이타베이스 내에 표현될 수 있고 사용자가 쉽게 다룰 수 있도록 객체 지향 데이타 모델을 이용해 이미지 데이타를 모델링하였다. Database systems have provided convenient methods for obtaining specific information from a large repository of data. All the information was readily available and the mapping between data and its semantics was straightforward. However, the increasing availability of multimedia data sources needs new data forms for which the mapping between data and semantics is not clear. In particular non-alphanumeric data such as images, voices, graphics etc. contain large amounts of information that are difficult to quantify in a complete and concise fashion. This paper addresses the problem of embedded semantic information. And an Object-Oriented data model is designed so that the data can be represented in an image database and can be readily managed by users.
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Lexical Analyzer의 Design을 위한 Algorithm의 실행에 관한 연구
石尙基 서울産業大學校 1983 논문집 Vol.19 No.1
The complier is composed of 5 main phase and 2 subphases-Lexical Analyzer, Syntax Analyzer, Intermediate Code Generator, Code Optimizer, Code Generator, Table Management and Error Handler. In these Lexical Analyzer, the first phase of compiler, is carving the source program into a sequence of atomic units called token. This paper implements the algorithm that converts the Regular Expression to NFA, NFA to DFA and minimize of DFA states for the design of a Lexical Analyzer.
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石尙基 서울産業大學校 1985 논문집 Vol.21 No.1
There exist some problem in current IBM HANGUL subroutine. Those problems are the lower speed in data processing and the harder linkage between subroutines. So the overall system performances are degraded. In this thesis the subroutines are designed and implemented to solve those problems.
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金淇龍,石尙基 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.-
Multimedia systems have recently been studied in the various application systems such as office automation, classroom teaching, collaborative research environments, computer-integrated manufacturing, military command and control. In this paper we survey the multimedia systems and propose the paradigms and architecture of MDBMS(Multimedia Data Base Management System) and last enumerate the research issues of multimedia systems.
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PC-DBMS에서의 질의어 QDECOMP알고리즘에 관한 연구
오염덕,김충석,석상기 서울産業大學校 1989 논문집 Vol.29 No.1
In this paper, the following components are included: Data Definition Language (DDL), Data Manipulation Language (DML), Query Language for stand alone, graphic, and reporting facilities in PC-DBMS. We tried to design a menu-driven RDBMS so that can support DECOMP algorithm for query language and the users, unfamiliar with the computers, can easily use the databases. This system catalog file consists of RELCATA including information about the database files and FIDCATA including information about the database fields. DDL is provided to creat, modify and delete the structure of database files. DML is provided to update, delete, and modify a record, and Query Language is provided also. Graphic and Reporting facilities are used to provided graphs and reports, respectively.
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