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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Journal of the Korea institute of electronic communication sciences
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The Korea Institute of Electronic Communication Science
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Volume & Issues
Volume 2, Issue 4 - Dec 2007
Volume 2, Issue 3 - Sep 2007
Volume 2, Issue 2 - Jun 2007
Volume 2, Issue 1 - Mar 2007
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Tracking Control of Nonlinear System using the Variable Structure Control with Sliding Sector
Han, Jong-Kil ; Son, Yong-Su ;
The Journal of the Korea institute of electronic communication sciences, volume 2, issue 2, 2007, Pages 67~74
Chattering phenomenon is still a large drawback of VSS. To overcome this problem, various approaches have been reported. A new notion of sliding sector has been proposed recently. Inside this sector, a kind of norm of the state decreases without control input. Therefore, so long as the state is constrained inside this sector, the norm of the state approaches to zero. The sliding sector theory is elementary study step and is studied about only linear systems. In this paper, new methods of the tracking control of unstable nonlinear systems using the sliding sector is proposed. This paper analyzes the stability, using Lyapunov function on the sliding sector. Through the computer simulations for an inverted pendulum system, it is verified that sliding sector control is capable to reduce the chattering.
A Congestion Control Mechanism in Wireless Sensor Networks
Joo, Jeong-Ran ; Lee, Sung-Keun ;
The Journal of the Korea institute of electronic communication sciences, volume 2, issue 2, 2007, Pages 75~82
Wireless Sensor Network(WSN) is composed of a large number of sensor nodes and accomplish a common task such as environment monitoring or asset tracking. This paper proposed a congestion control mechanism applying the ECN mechanism and the cross layer design to cope with temporal congestion in WSN. We experimented with the proposed congestion control mechanism using ns-2 simulator and measured the throughput of sink node. Simulation results show that the suggested mechanism can improve the performance of packet throughput by dealing with the congestion of network efficiently.
Implementation and Application of PML Server for Vehicle Information Management in RFID Environment
Oh, Won-Rock ; Lee, Sung-Keun ;
The Journal of the Korea institute of electronic communication sciences, volume 2, issue 2, 2007, Pages 83~91
The purpose of this paper is developing a PML server which is capable of saving and managing effectively the information of vehicles using RFID technology in the logistical and distributive environment. The PML server logs and manages the real-time static and dynamic information about the vehicles in EPC code format which is represented by XML schema and transmitted by the RFID reader to the server. It receives information from SAVANT the RFID middleware and transmits the data to the traffic information management application The main system we developed consists of the EPC data registry, query processor, data converter, vehicle product and instance data storage, system management tool and application API parts.
Implementation and Application of Fish Drug Information System
Kim, Hae-Ran ; Park, Gae-Hwa ; Cho, Hyug-Hyun ; Ceong, Hee-Taek ;
The Journal of the Korea institute of electronic communication sciences, volume 2, issue 2, 2007, Pages 92~98
Database System of approved fish drug products was consisted of trade name, species, ingredients, sponsor, disease, dose forms, drug forms, indication, law and so on. Also in addition, we will develope the database system for fish disease information. So we propose to expand and practice for publishing a medical prescription and making an order of drug by Fish Disease Distinction System which is based on drug information system and disease information system.
Design of Geocasting in MANET using the Improved LBM
Lee, Cheol-Seung ; Lee, Joon ;
The Journal of the Korea institute of electronic communication sciences, volume 2, issue 2, 2007, Pages 99~105
MANET(Mobile Ad-hoc network) have recently attracted a lot of attention in the research community as well as in industry. Although the previous research mainly focused on various of MANET in routing, we consider, in this paper, how to efficiently support applications such as variable geocasting basd on MANET. The goal of a geocasting protocol is deliver data packet to a group of nodes that are located within a specified geocasting region. Previous research that support geocast service in mobilie computing based on MANET have the non-optimization problem of data delivery path, overhead by frequent reconstruction of the geocast tree, and service disruption problem. In this paper, we propose the mobility pattern based geocast technique using variable service range according to the mobility of destination node and resource reservation to solve this problem. The experimental results show that our proposed mechanism has improved performance of Accessibility & Network Overhead than previous research.
Fish Schooling Simulator Using Crowd Behavior Patterns
Kim, Jong-Chan ; Cho, Seung-Il ; Kim, Eung-Kon ;
The Journal of the Korea institute of electronic communication sciences, volume 2, issue 2, 2007, Pages 106~112
Recently the crowd environment in the department of the animation is necessary to the digital industry. The goal of researching a proper crowd animation is to design character animation that is defined by the reality of scenes, performance of system and interaction with users to show the crowd vividly and effectively in cyber underwater. It is important to set up the crowd behavior patterns to represent for moving crowd naturally in cyber space. In the paper, we expressed the behavior patterns for flocks of fish in cyber underwater, and compared with the number of mesh, the number of fish, the number of frame, elapsed time, and resolution and analyzed them with the fish behavior simulating system.
Model of the ebXML-based BPSS Conformance Validation in B2B Enviroment
Shin, Myeong-Sook ; Choi, Jong-Sik ; Ahn, Seong-Soo ; Lee, Joon ;
The Journal of the Korea institute of electronic communication sciences, volume 2, issue 2, 2007, Pages 113~117
Recently B2B electronic transactions which go through an Internet being diffused, according to support the Internet business of the form which is various the techniques for are appearing. B2B electronic transaction systems respect B2B transactions consequently to control the system of selfish bell environmnet and various information, must exchange. But currently the tentative tool for the verification of BPSS is the condition which is wholly lacking with the domestic foreign enemy. In this paper the suitability ebMS standard verification entry written in conjunction with ebXML BPSS document the suitability of the case, depending on the item to evaluate whether the BPSS model, suggesting that fitness will be verified.
A study on Twofish Cryptoalgorithm Design for Security in the PC Peripheral devices
Jeong, Woo-Yeol ; Lee, Seon-Keun ;
The Journal of the Korea institute of electronic communication sciences, volume 2, issue 2, 2007, Pages 118~122
The previous security system was PCI way which has many difficulties for PC novices to use. Moreover the security programs in use are mostly unverified ones as they are using cracks, and are exposed to attacks such as hackers and viruses. Therefore this thesis describes to design the security system of Twofish cryptographic algorithm using USB, which it can be used in general-purpose computers and users can handle it with ease. Users can easily use the security system by using this USB and it is applicable to various security systems that Twofish cryptographic algorithm used in the security system by having variable key length. Also the efficiency of the system can be enhanced as it can perform both encryption and decryption and it has a benefit of downsizing hardware.
The Development of Vital Sign Web Viewer Systems using HL7 Protocol
Lim, Se-Jung ; Kang, Ki-Woong ; Seo, Jong-Joo ; Kim, Gwang-Jun ;
The Journal of the Korea institute of electronic communication sciences, volume 2, issue 2, 2007, Pages 123~128
HL7 is well-Known standard protocol for text data generated in hospital information systems. Vital sign information web viewer systems is also the standard protocol for medical image and transfer. In order to embrace new technologies as telemedicine service, it is important to develope the standard protocol between different systems in the hospital, as well as the communication with external hospital systems. In this paper, we proposed integration method between vital sign web viewr systems and hospital information systems. Through the proper data exchange and modification of information management, HIS will offer better workflow to all hospital employee.
Hybrid ARQ techniques for multimedia services in Hospital Network
Kim, Sung-Hong ; Suk, Kyung-Hyu ;
The Journal of the Korea institute of electronic communication sciences, volume 2, issue 2, 2007, Pages 129~135
In this paper, we present hybrid ARQ techniques to improve the throughput performance in high speed packet transmission such as Internet or multimedia services in Hospital. In order to evaluate the performance of the three different types of hybrid ARQ schemes, systemized link level simulations based on WWW traffic model are considered. In this paper, we also consider the simulated performance for an average link throughput and a normalized packet delay to compare the hybrid ARQ with link adaptation scheme in GPRS.
Specific Handset Design for Environmental data Monitoring in Aquafarm
Seo, Jung-Hyun ; Han, Soon-Hee ; Kang, Young-Man ; Jang, Moon-Suk ;
The Journal of the Korea institute of electronic communication sciences, volume 2, issue 2, 2007, Pages 136~141
To produce eco marine products which is taking interests recently, the necessity of aquafarm tracing system is being emphasized. Considering the particularity of aquafarm, wireless communication environment is essential in order to manage aquafarm efficiently. The terminal which automatically collecting the environmental information and transferring it to server needs specified functions; input-output the information conveniently and search it visually. In this paper, we design specified terminal and its functions to monitor the environmental information at aquafarm.