• Journal of Korea Multimedia Society
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• v.5 no.5
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• pp.530-537
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• 2002

Although a type of Web-based education has increased continuously, it has provided an environment that students use textbooks which are forms of homepage, make a note of lecture on Web browser, save the contents of note and use them again. Therefore, this thesis proposes a web note, MyNote, that students draw lines and write notes about the lecture using VML and DHTML on Web. Here, the contents of the note are saved in database with a form of text-based VML made dynamically using ASP. The document used with teaching material is downloaded from Web server to Web client and the content of VML is done from database. Using MyNote, students have their own libraries on Web. The content of note Is saved and printed on Web, and learners can relearn because they can review the content.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.3
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• pp.561-566
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• 2013

In this paper, android phone information push system based on the XMPP protocol is proposed. For this, we implement a XMPP(eXtensible Message and Presence Protocol) based instant message system in C/S network environment by using Java language and eclipse device. This system not only allows sending and receiving messages from the PC server to mobile phone client, but also enables the expansion into the smack package of an android phone. Thus, this system shown, in this paper has the better performance in transmission and transfer speed than those of the basic XMPP protocol system.

• The Journal of the Korea Contents Association
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• v.11 no.5
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• pp.93-103
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• 2011

Currently, the library system using the method of the software on the client / server and ASP by providing services in a manner of hardware and software, and cross-referencing, installation and deployment, Customization, Upgrade, risk management, and software licenses across the high-cost management of difficult and costly There is a problem. To solve these problems, SaaS based Integrated Management System for Digital Library, multi-tenant environments(SaaS Maturity Level 3 and above) as a key element in the implementation were developed. Therefore, almost no initial investment cost, easy, simple, low-cost IT services available on SaaS based software on-demand service model of how the system is implemented.

• The Journal of Korean Association of Computer Education
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• v.3 no.1
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• pp.51-63
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• 2000

All learners can selection of their work through hypermedia technology in the area provided by usual WBI. Also, it provides learner with individual teaching-learning environment and estimation. RC2 System has the fundamental client/server model, and provides the learning, evaluation algorithms based on the LCPG(Learning Contents Problem Graph) model, the dynamic re-learning mechanism in according to the property of individual. Moreover, it support learning editor to provide interface, which is convenient for teacher, Courseware writer, on the Web

• Journal of Aerospace System Engineering
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• v.1 no.4
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• pp.13-21
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• 2007

As one of YHF digital data link technologies, VDL Mode 2 is designed to be an air-to-ground subnetwork of the Aeronautical Telecommunication Network (ATN) based on the Open System Interconnection (OSI) architecture. VDL Mode 2 can be used in ATS Applications especially for CPDLC and ADS. And it is also expected to replace ACARS (Aircraft Communications Addressing and Reporting System) which has broadly been used in AOC for over 20 years. This paper presents the design result of VDL Mode 2 system under AOA (ACARS Over AVLC) environment for the implementation of bit-oriented ATS applications. The system is composed of airborne and ground subsystem. Airborne subsystem consists of VDR, CMU and an aircraft test equipment with CPDLC/ADS client applications for operational test and ground system consists of Ground Station which includes ground VDR and ground communication controller, simple DSP (Datalink Service Processor) and a ground test equipment with CPDLC/ADS server applications.

• IE interfaces
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• v.16 no.1
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• pp.8-15
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• 2003

With rapid growth of internet technology, companies have developed an information system such as the electronic catalog for product data in the E-Business. Due to the heuristic nature of the catalog search for proper tools in the specific process, the intelligent and user friendly methods residing in the search process give a comfortable environment even for the beginners in the field. In this paper, we develop a web based catalog for machining tools especially in Milling process. It has two distinct procedures for the users of the catalog; Search and Analysis. The Search is to select a proper cutter, insert, component combination in the developed relational database based on the cutting process and material. The Analysis is to suggest a recommended optimal cutting conditions based on the machining tools and selected materials. All of these procedures are stored in a server with a program based on the ASP and Java Script where the procedure is initiated by the client using the internet which is accessed through insert. With the success on implementing the above engineering database in the internet, we can provide the foundation for developing PDM with heuristic procedure.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.9 no.8
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• pp.1691-1695
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• 2005

Mobile P2P Service can compose free network from one client to another without central server function. Diversified Information & Data are able to be transmitted among peer to peer based upon extended mobile concept. In this paper Mobile P2P Service is applied to the program which gathering, sharing, analysis agricultural information and the natural disasters Information We desire to authenticate request about service to user who is administered between each user to limit connection. Wish to admit authentication mechanism to mechanism that can do information sharing suety in P2P environment to solve this in this treatise and design authentication mechanism.

• The Transactions of the Korea Information Processing Society
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• v.5 no.3
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• pp.763-773
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• 1998

본논문은 TCP/IP를 사용하는 기존의 LAN상에 이동 호스트들이 셀의 형태로 덧붙여진 환경에서 이동 호스트와 고정 호스트간의 지속적인 세션을 지원하는 개선된 IP 체계인 SIMIP을 제안하였다. 이동형 프로토콜 설계시 라우팅 최적화가 매우 중요한 항목이고 이는 이동 호스트의 위치정보 관리방법과 직접적인 관계가 있다. 기존의 아이비엠과 마쓰시다 제안은 이를 집중화하였으며 콜롬비아와 소니제안은 이를 분산화하였다. MH 위치정보를 집중화하면 트라이앵글 문제로 인해 최적의 라우팅 경로를 지원할 수 없으며 집중화된 라우터의 실패 발생시는 위험도가 매우 크다. 반면에 분산화하면 위의 문제들은 해결되지만 캡슐화되는 주소를 찾기위해 CACH 또는 AMT와 같은 복잡한 기법이 요구된다. SIMIP은 MH위치정보를 DMR에 집중화하였으나 DMR 실패 발생시는 복수의 GMR중에서 하나가 자동적으로 DMR로 대체되어 위험도를 최소화시켰고, 'DMR 경로변경'에 의해 최적의 라우팅 경로를 지원하였다는 점에서 다른 제안들과 차이가 있다. 이동에 따른 주소변경을 해결하기 위해 가상네트워크 기법을 적용하였고, 이동 호스트로의 데이터 송신시 디폴트 라우팅 개념을 이용하였고, 이동라우터간 터널링에 IPIP 캡슐화를 사용하였다. SIMIP은 다른 제안에 비해 실용성있고, 신뢰성이 강하며, 구현이 용이하므로 산업계에서 활용가치가 있으리라본다.

• Journal of Information Technology Services
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• v.8 no.1
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• pp.193-202
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• 2009

Cloud computing emerges as a new computing paradigm which targets reliable and customizable services. The term builds on decades of research in virtual machine, distributed and parallel computing, utility computing, and more recently networking, web service, and software as a service. In this paper, we provide a seamless connection migration of web services. This is useful for cloud computing environment in which many client terminals have mobility. With the wireless internet facility, those mobile users can move place to place during internet communication. Therefore, we provide solutions to the two major problems in current virtualization based migration: communication failure problems and connection re-establishment. Communication channel flushing by zero window notification helps to resolve the communication failure problems and TCP port inheritance prevents connection re-establishment errors during socket reconstruction. Thus, our web service migration facility is now able to preserve open network connections, and even for server sockets. This is a highly transparent approach, in that we did not Introduce additional messages for channel flushing and did not make any modification to the TCP protocol stack. Experimental results show that the overhead due to connection migration of web services is almost negligible when compared with time to take the conventional web service migration.

• The KIPS Transactions:PartD
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• v.12D no.5 s.101
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• pp.765-772
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• 2005

For the excellent U web services, the program developers should create both user's client program and the sewer program Recently, the structural alteration of programs are often caused by infernal and external environment concerned with social trends and preferences as well as user's requirements expectations. So, for reducing the development time and workload of XML web service programs, it is necessary to develop the web program generation tools. This paper suggest how to design and implement the web-based XML Tree builder, which was able to provide the information for promptly and easily generating the XML Schema, XML Stylesheet and XML Document through the XML Development Supporting Server System.