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- 저자 : 禹容泰 (검색결과 88 건)
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박남숙,장기화,곽난희,이수현,우용태 國立 昌原大學校 精報通信硏究所 1998 精報通信論文集 Vol.2 No.-
The purpose of this paper is to develope a distance education that would be a courseware for a specific object, which can be available for student to learn the necessary knowledge or function, with no restriction of time or place, using WWW and Oracle DBMS. The distance education was designed in this paper consists of bulletin board, subject information, lecturing schedule, online instructions, questions and answers, submit and confirmation of reports, evaluation of lecturing, reference sites, chatting and discussion room, and data bank. The distance education coupled by WWW and database will change the educational form from one-direction to bi-direction between a teacher and the students. This can also provide a multimedia information to the students through WWW environment with convenient user interface. Those benefits made it possible to offer animated audio-visual materials and search for the information concerned through a hypertext technique. Besides, various kinds of informations were stored at database to increase an effectiveness in managing data. Since both teacher and students, are easy to add new information using the process of instruction to the database, the amount of the stored information in the distance education can be expanded effectively.
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장기화,우용태 國立 昌原大學校 精報通信硏究所 1998 精報通信論文集 Vol.2 No.-
In this paper, we propose a new type of gateway system for WWW-Oracle interface. It supports various types of relational queries on the WWW such as join between two tables, one level nested queries, ORDER BY and GROUP BY operations in conditional clause. In addition, an application designer can suggest an access method for a table by query selection with a hint option on the WWW. It causes the Oracle optimizer to chose the specified access path. By this function, an application designer can choose more efficient way than the optimizer can determine. The designer can also check the execution time of the SQL statement on the WWW.
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禹龍泰 慶星大學校 1988 論文集 Vol.9 No.1
1. Line census was monthly in the water catchment area of Bueb Ki, from Jan., 1985 to Dec. 1986. 2. 1128 individuals of 70 species in 1985 and 1254 individuals of 60 species in 1986 were recorded. Among them a total of 71 species could be separated during the two years. Consequently, number of individuals of every month, dominance percentage and dominance index were calculated. 3. The species which showed 100 percentage of dominance were 12 in 1985 and 11 in 1986. Those which showed above 50 percentage of dominance were 20 both in 1985 and in 1986. 4. Those showing above 10 percentage of individual dominance were only two species, Crow Tit and Siskin, in 1985, and Mandarin Duck and Crow Tit in 1986. The others showed only below 10 percentage of dominance. 5. The species which showed dominance index, 10 was only Crow Tit. Those belonging to the upper 10 ranks in the dominance index were all residents. 6. In 1985, of the total 70 species, 25 species of residents, (35.7%), 28 of Summer Visitors, (40%), 13 of winter visitors, *8.6%) and 4 of passage migrants, (5.7%) were recorded, and in 1986, of the total 60 species, 24 of residents and Summer Visitors, (40%) and 12 of winter visitors (20%) were recorded. 7. In 1985, of the total 1128 individuals, 691 of residents, (61.3%), 267 of winter visitors, (23.7%), 160 of summer visitors, (14.2%) and 10 of passage migrants, (0.9%) were recorded. In 1986, of the total 1254 individuals, 635 of residents, (50.6%), 426 of winter visitors, (36.8%) and 157 of summer visitors, (12.5%) were recorded. 8. Through the year, the largest number of species was recorded in spring. In 1985, of the total 70 species, 48 species were recorded during spring period.(Mar∼May) In 1986, of the total 60 species, 49 were recorded during the same period. 9. Apart from these surveys, another survey was also made in the same area from 1960. A total of 85 species could be recorded during the period.
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분산제어 구조를 가지는 TDX-10 전전자 교환기에서 프로세서간 통신 네트워크 관리
정연쾌,우용태 國立 昌原大學校 基礎科學硏究所 1993 基礎科學硏究所論文集 Vol.4 No.-
This paper presents the structure of Inter-Processor Communication(IPC) network implemented for TDX-10 which is the large-capacity digital swiching system with distributed control being developed by ETRI. It also describes management function of the IPC network to provide reliable internal network path.
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정철호,문현정,옥수호,우용태 國立 昌原大學校 情報通信硏究所 1997 精報通信論文集 Vol.1 No.-
Aggregate functions are used to make queries simple, remove unnecessary operations and improve the overall performance in the traditional relational database systems. In this paper, temporal aggregate functions are proposed. Temporal aggregate function is implemented by function definition clause and aggregate function definition clause on POSTGRES V4.2. For the temporal aggregate functions under POSTGRES, the low level of temporal operators for extended temporal data types that INSTANT, SPAN and INTERVAL are implemented. In addition, the aggregate functions for INTERVAL, count, sum, average, min, max, earliest and latest, are implemented ; and for INSTANT, count, earliest and latest are implemented ; and for SPAN, count, sum, average, min, max functions are implemented. Moreover, various kinds of typical query languages for temporal aggregate functions are presented, and simulation of these temporal aggregate functions shows their effectiveness.
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ADALINE을 이용한 훼손된 영상에 대한 에지검출 연구
鄭聖煥,禹容泰 國立昌原大學校 基礎科學硏究所 1992 基礎科學硏究所論文集 Vol.3 No.-
The edge detection technique using neural network is discussed for some noisy images. It is compared with conventional edge detection techniques by the subjective measure and objective. The edge detection technique of neural network shows better performance than others in some noisy environments.
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分散 데이타베이스 시스템에서의 相互不一致發見 및 再調整 알고리즘
禹容泰 國立 昌原大學校 産業技術硏究所 1987 産技硏論文集 Vol.1 No.-
In many cases it is desirable to keep redundant copies of critical resources such as files in distributed database systems. Although redundancy increases reliability and availability, it leads to mutual consistency problems when network partitions occur. This paper describes a mechanism to detect mutual inconsistency by using the modified version vector mechanisms which detailed update operation and suggests a method to reconcile these conflicts efficiently.
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分散 데이터 베이스 시스템에서 Deadlock 解決 方法에 관한 硏究
禹容泰,李相祚 경북대학교 공과대학 1986 工大硏究誌 Vol.15 No.-
This paper presents a protocol for deadlock detection and resolution in distributed database systems. This protocol maintains transaction status table and data item status table with flag field. The priority of transaction is based on the number of data items that transaction held. It minimizes the number of communications to be transfered to control site for global deadlock detection and the system overhead by resolution. And it is easily extended to the system that allows to x-lock as well as s-lock.
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