• The Journal of Korean Institute of Communications and Information Sciences
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• v.27 no.11C
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• pp.1040-1045
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• 2002

This paper focuses on a hash-based, distributed Wet caching network that eliminates inter-cache communication. An agent program on cache servers, a mapping program on the DNS server, and other components comprised in a distributed Web caching network were modified and developed to implement a so-called "consistent" hashing. Also, a dynamic load balancing algorithm is proposed to address the load-balancing problem that is a key performance issue on distributed architectures. This algorithm effectively balances the load among cache servers by distributing the calculated amount of mapping items that have higher popularity than others. Therefore, this developed network can resolve the imbalanced load that is caused by a variable page popularity, a non-uniform distribution of a hash-based mapping, and a variation of cache servers.

• The KIPS Transactions:PartA
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• v.8A no.1
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• pp.70-74
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• 2001

A general web-based remote lecture system uses video data and audio data to provide synchronize between teacher and students. This system requires high bandwidth, high speed networking, television, compression and computing technologies between server and client for remote lecture over Internet. As a result, this system can decrease an efficiency for lecturing over current Internet. So, this paper proposes a new mechanism calling as ‘Synchronization of WWW browsers between server and client’to cope with above problems and finally pursues low cost needed for real-time remote lecture over Internet. The mechanism means that every browser of teacher and students displays the same page and the action of teacher is transferred to the browser of student. And, this can be implemented by Windows hooking APIs, Memory Mapping, and DLL (Dynamic Link Library) programming technology. This paper points to the design and implementation of LAS (Lecture Assistant Server) and LAC (Lecture Assistant Client) to perform the synchronization between server and client.

• Journal of Korean Institute of Industrial Engineers
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• v.39 no.3
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• pp.163-171
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• 2013

Various web browsers offer mouse gesture functions because they are convenient input methods. Mouse gestures enable users to move to the previous page or tab without clicking its relevant icon or menu of the web browser. To maximize the efficiency of mouse gestures, they should be designed to match users' mental models. Mental models of human beings are used to make accurate predictions and reactions when certain information has been recognized by humans. This means providing users with appropriate information about mental models will lead to fast understanding and response. A cognitive response test was performed in order to evaluate whether the mouse gestures easily associate with their respective functional meanings or not. After extracting mouse gestures which needed improvement, those were redesigned to reduce cognitive load via sketch maps. The methods presented in this study will be of help for evaluating and designing mouse gestures.

• Journal of Energy Engineering
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• v.13 no.3
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• pp.199-204
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• 2004

This Paper deals with a Platform for diagnosis monitoring of DC-DC converter system based on Java virtual machine. This platform is designed for estimating diagnostic parameters of DC-DC converter system based on system identification method and displaying Web-page on operating status. For Web-service, hardware of platform is baled on a Strongarm processor and software bale is designed on Linux and java virtual machine.

• Annual Conference of KIPS
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• 2000.04a
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• pp.36-39
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• 2000

웹에 등장한 다양한 웹사이트는 사용자의 정보획득 욕구를 충족시켜주는 최고의 정보 자원이 되었다. 하지만 최근 웹사용자의 경향이 보다 더 좋은 성능에서 정보를 얻고자 하여 정보 전달 능력이 낮은 사이트들은 양질의 정보를 보유하고도 사용자들에게 외면 당하고 있는 추세이다. 본 논문에서는 웹사이트의 성능을 향상시키기 위해 주방문자의 정보와 전송 시간에 관련된 여러 가지 요소, 웹페이지 구성요소의 중요도, 전송 속도와 사용자 만족도 간의 관계 등을 이용하여 사이트의 정보 전달 능력을 개선시킬 수 있는 웹페이지 분석 도구를 제안하고자 한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.85-86
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• 2023

ActiveX와 같은 플러그인으로 돌아갔었던 웹 페이지들은 보안 취약성과 인터넷 익스플로어(IE)의 서비스 종료로 인하여 많은 웹 브라우저들이 플러그인 제거 사업을 진행하였다. 하지만 웹 표준으로 전환하였을 때 생기는 웹 호환성과 보안 문제들이 발생하였다. 이를 해결하고자 호환성과 보안 문제를 훈련 시킨 클라우드 서버를 이용하여 미리 파악하고 진단할 수 있는 웹 페이지 보안 체크 모델을 제안한다. 본 논문에서 제안한 모델을 적용한다면, 웹의 표준 및 호환성과 보안 문제에 대해 더 빠르게 파악하는데 도움을 줄 수 있을 것이다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.01a
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• pp.253-256
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• 2023

코로나 바이러스 감염증-19(COVID-19)의 유행으로 인해 배달업과 택배 쇼핑몰의 수요가 증가하였다. 본 연구는 쇼핑몰을 만드려는 소상공인들의 증가하는 추세에 맞는 앱 개발을 하기 위해 관리자 페이지에서 쉽게 재고 조작과 회원 관리, 문의 해결, 글 쓰기 등이 가능하면서 보안이 유지되는 관리자 페이지를 주기능으로 개발하였다. 이를 바탕으로 누구나 쉽게 쇼핑몰을 관리하여 경제의 활성화에 기여할 것으로 기대된다.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.44 no.1
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• pp.71-79
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• 2007

Recent advances in the internet infrastructure have resulted in a large number of huge Web sites and portals worldwide. These Web sites are being visited by various types of users in many different ways. Among all the web page access sequences from different users, some of them occur so frequently that may need an attention from those who are interested. We call them frequent access patterns and access sequences that can be frequent the candidate patterns. Since these candidate patterns play an important role in the incremental Web mining, it is important to efficiently generate, add, delete, and search for them. This thesis presents a novel tree structure that can efficiently store the candidate patterns and a related set of algorithms for generating the tree structure, adding new patterns, deleting unnecessary patterns, and searching for the needed ones. The proposed tree structure has a kind of the 3 dimensional link structure and its nodes are layered.

• Journal of KIISE
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• v.41 no.12
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• pp.1099-1109
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• 2014

Web-accessibility evaluation tools can be used to determine whether or not a website meets accessibility guidelines. As such, many such tools have been developed for web accessibility, but most of them dynamically fetch and analyze pages and as a result, some pages maybe omitted due to the lack of access authorization or environment information. In this paper, we propose a static method that analyzes web accessibility via abstract parsing. Our abstract parsing technique understands syntactic and semantic program structures that dynamically generate web pages according to external inputs and parameters. The static method performs its analysis without omitting any pages because it covers all execution paths. We performed an experiment with a PHP-based website to demonstrate how our tool discovers more accessibility errors than a dynamic page accessibility analysis tool.

• Journal of Internet Computing and Services
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• v.7 no.3
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• pp.155-167
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• 2006

It is desirable if users surfing on the Internet could find Web pages related to their interests as closely as possible. Toward this ends, this paper presents a topic specific Web crawler computing the degree of relevance. collecting a cluster of pages given a specific topic, and refining the preliminary set of related web pages using term frequency/document frequency, entropy, and compiled rules. In the experiments, we tested our topic specific crawler in terms of the accuracy of its classification, crawling efficiency, and crawling consistency. First, the classification accuracy using the set of rules compiled by CN2 was the best, among those of C4.5 and back propagation learning algorithms. Second, we measured the classification efficiency to determine the best threshold value affecting the degree of relevance. In the third experiment, the consistency of our topic specific crawler was measured in terms of the number of the resulting URLs overlapped with different starting URLs. The experimental results imply that our topic specific crawler was fairly consistent, regardless of the starting URLs randomly chosen.