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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Digital Contents Society
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Digital Contents Society
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Volume & Issues
Volume 4, Issue 2 - Dec 2003
Volume 4, Issue 1 - Jun 2003
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Design and Implementation of a High Performance Web Crawler
Kim Hie-Cheol ; Chae Soo-Hoan ;
Journal of Digital Contents Society, volume 4, issue 2, 2003, Pages 127~137
A Web crawler is an important Internet software technology used in a variety of Internet application software which includes search engines. As Internet continues to grow, implementations of high performance web crawlers are urgently demanded. In this paper, we study how to support dynamic scheduling for a multiprocess-based web crawler. For high performance, web crawlers are usually based on multiprocess in their implementations. In these systems, crawl scheduling which manages the allocation of web pages to each process for loading is one of the important issues. In this paper, we identify issues which are important and challenging in the crawl scheduling. To address the issue, we propose a dynamic crawl scheduling framework and subsequently a system architecture for a web crawler with dynamic crawl scheduling support. This paper presents the design of the Web crawler with dynamic scheduling support.
An Error Control on Multimedia Distance Education System with Synchronous and Asynchronous Mode
Ko Eung-Nam ;
Journal of Digital Contents Society, volume 4, issue 2, 2003, Pages 139~146
This paper explains the design and implementation of the ERA(Error Recovery Agent). ERA is a system that is suitable for detecting, sharing and recovering software error based on multimedia distance education system. This system consists of an ED, ES, and ER. ED detects an error by hooking techniques. ES is an agent which is an error sharing system for distributed multimedia distance education system. We propose how an error application can be treated and recovered as 'media' in a multimedia collaborative environment.
A Study on the Development of Digital Contents for Land Estimation
Song Eun-Jee ;
Journal of Digital Contents Society, volume 4, issue 2, 2003, Pages 147~155
The problem of the objective adequacy on land estimation has been seriously discussed with the Issue of paradigm conversion on land policy as the economy situation has been worse enough to be confused due to the sale price which could not be predicted in Korea. Especially as the data of the government land value is not recognized as the official one, the separate alternation has been adopted to calculate the value of land compensation or development allotment. Rather it has raised a question in argument that the system of the declared value does not accomplish its basic function properly on the contrary of the original purpose to unify the computation of the government land value. To reconsider the adequacy of government land value, the most crucial factor is to select the items of land estimation reasonably. In addition, it is urgently required to develop the system of digital contents to provide the data of land evaluation which most of people could trust, who are facing of the flood of information through internet.
An Approach for the Digital Works Development Based on Usability Engineering
Kang Ji-Young ; Choi Young-Mee ;
Journal of Digital Contents Society, volume 4, issue 2, 2003, Pages 157~165
In this paper we propose a multi-step approach for interactive design development based on usability engineering and show the proposed methodology is able to apply the digital art works. As an example, we show the proposed multi-step approach is efficient in the developing process of a digital design works.
A Study of Web-oriented Learning Method and Effect for English
Hong Sung-Ryong ;
Journal of Digital Contents Society, volume 4, issue 2, 2003, Pages 167~179
It has been widely researched in many studies what is the most effective way to learn English as a second language. It has been generally accepted that the most effective teaching method is to make students interested in learning of English. Teaching method has to be modified with the change of the times according to the demand of the students. The purpose of this study is to reveal that language teaming method through internet could be more effective than that of the existing teaching one by offline loaming. For this purpose some subject students were divided by two groups of the experimental and of the controlled. From the result of the study it could be derived that teaching method, by means of cyber lecture, make a great effect not only on the attitude but on the achievement of the students when they are in the class of English as a second language. This paper also shows what could be the typical model for the teaching method by internet based on the experiment. This kind of way of teaching is supported by the questionnaire which has much more positive response from the students who were in the member of experimental group. Finally such a experiment would be described based on the Web-oriented teaching method with the respect of education of digital contents.
Performance Analysis of Error Classification System on Distributed Multimedia Environment
Ko Eung-Nam ;
Journal of Digital Contents Society, volume 4, issue 2, 2003, Pages 181~189
The requirement of distributed multimedia applications is the need for sophisticated QoS(quality of service) management. In terms of distributed multimedia systems, the most important catagories for quality of service are a timeless, volume, and reliability In this paper, we discuss a method for increasing reliability through fault tolerance. We describe the design and implementation of the ECA running on distributed multimedia environment. ECA is a system is able to classify automatically a software error based on distributed multimedia. This papaer explains a performance analysis of an error classification system running on distributed multimedia environment using the rule-based DEVS modeling and simulation techniques. In DEVS, a system has a time base, inputs, states, outputs, and functions.
Design and Implementation of Intelligent Equipment Management System Using Data Mining
Jo Yung-Ki ; Kim Sang-Soo ; Cho Ju-Sang ; Baik Sung-Wook ;
Journal of Digital Contents Society, volume 4, issue 2, 2003, Pages 191~202
This paper presents a design and implementation example of intelligent equipment management system that is constructed to manage high price equipment of digital content department effectively. To support system operation we executed data mining and presented various rules that appear in dat3 mining process based on dat3 of user, equipment and using record. We presented personalization plan of web site to offer user dependent administration policy and dynamic interface using analyzed informatio.
A New Multicast MAC Protocol for Wireless Ad Hoc Network
Lim Jae-Hwan ; Bang Kee-Chun ;
Journal of Digital Contents Society, volume 4, issue 2, 2003, Pages 203~210
In this paper we proposed a new MAC protocol to improve QoS(Quality of Service) for real-time traffic in wireless Ad Hoc networks. NMAC protocol have a contention period reservation scheme and a priority control scheme to provide fairness of nodes and QoS. Through simulation, the NMAC protocol compared with existing CSMA MAC protocols shows improvement in performance.
Performance Analysis of Adaptive Corner Shrinking Algorithm for Decimating the Document Image
Kwak No-Yoon ;
Journal of Digital Contents Society, volume 4, issue 2, 2003, Pages 211~221
The objective of this paper is performance analysis of the digital document image decimation algorithm which generates a value of decimated element by an average of a target pixel value and a value of neighbor intelligible element to adaptively reflect the merits of ZOD method and FOD method on the decimated image. First, a target pixel located at the center of sliding window is selected, then the gradient amplitudes of its right neighbor pixel and its lower neighbor pixel are calculated using first order derivative operator respectively. Secondly, each gradient amplitude is divided by the summation result of two gradient amplitudes to generate each local intelligible weight. Next, a value of neighbor intelligible element is obtained by adding a value of the right neighbor pixel times its local intelligible weight to a value of the lower neighbor pixel times its intelligible weight. The decimated image can be acquired by applying the process repetitively to all pixels in input image which generates the value of decimated element by calculating the average of the target pixel value and the value of neighbor intelligible element. In this paper, the performance comparison of proposed method and conventional methods in terms of subjective performance and hardware complexity is analyzed and the preferable approach for developing the decimation algorithm of the digital document image on the basis of this analysis result has been reviewed.
Design and Implementation of an On-line RPG Game Content
Lee Hun-Joo ; Kim Hyun-Bin ;
Journal of Digital Contents Society, volume 4, issue 2, 2003, Pages 223~231
Game industry has been growing rapidly due to the development of computer and IT technologies. Especially, computer game is known as the core of multimedia and hi-tech entertainment. Recently, computer game has been evolving into 3D RPG and simulation types which give players more realism from the existing 2D RPG ones. In this paper, we design and implement a full 3D on-line RPG game content. The game supports simultaneous connections of multi-users on each game server.
Implementation of TTS Engine for Natural Voice
Cho Jung-Ho ; Kim Tae-Eun ; Lim Jae-Hwan ;
Journal of Digital Contents Society, volume 4, issue 2, 2003, Pages 233~242
A TTS(Text-To-Speech) System is a computer-based system that should be able to read any text aloud. To output a natural voice, we need a general knowledge of language, a lot of time, and effort. Furthermore, the sound pattern of english has a variable pattern, which consists of phonemic and morphological analysis. It is very difficult to maintain consistency of pattern. To handle these problems, we present a system based on phonemic analysis for vowel and consonant. By analyzing phonological variations frequently found in spoken english, we have derived about phonemic contexts that would trigger the multilevel application of the corresponding phonological process, which consists of phonemic and allophonic rules. In conclusion, we have a rule data which consists of phoneme, and a engine which economize in system. The proposed system can use not only communication system, but also utilize office automation and so on.