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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of information and communication convergence engineering
Journal Basic Information
Journal DOI :
The Korean Institute of Information and Commucation Engineering
Editor in Chief :
Volume & Issues
Volume 6, Issue 4 - Dec 2008
Volume 6, Issue 3 - Sep 2008
Volume 6, Issue 2 - Jun 2008
Volume 6, Issue 1 - Mar 2008
Selecting the target year
Evaluation for cargo tracking systems in railroad transportation
Park, Nam-Kyu ; Kim, Joo-Young ; Choi, Woo-Young ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 239~244
Cargo tracking issue on train transportation is challenging area because of long distance haulage, theft, terror attack and customer service. This paper aims at evaluating various cargo tracking systems in terms of cost and technology. The contents of this paper consist of the research trend of cargo tracking system in the railroad transportation and reviewing of technical alternatives in cost and service side. GNSS and RFID are reviewed as location tracking technology, Internet and Satellite technology like INMASAT and Low Earth Orbit are also reviewed as communication infrastructure. This paper selects cost and service factors in two alternatives of GNSS-Satellite and RFID-Internet, among GNSS-Internet, GNSS, Satellite, RFID-Internet, RFID-Satellite and evaluate each alternative in terms of cost and service. In a result, in terms of cost, RFID-Internet type is superior to GNSS-Satellite type, but in service GNSS-Satellite type is preferred to RFID-Internet in point of area coverage and service coverage.
A Scenario for Enhanced Network-based Localized Mobility Management
Kim, Dong-Il ; Kim, Kwang-Deok ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 245~248
Everytime a node moves out of its area, the connection to the node encounters a handover which may cause much latency. NetLMM(Network based Localized Mobility Management) supports the mobility management for such nodes and improves handover latency using MIH(Media Independent Handover) function. In this paper, we add some messages to NetLMM procedure to improve handover latency and analyze its effects through a scenario based approach
3Meter Disc Buoy with Satellite Communications Infrastructure
Park, Soo-Hong ; Keat, Kok Choon ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 249~254
Moored ocean buoys are technically feasible approach for making sustained time series observation in the oceans and will be an important component of any long-term ocean observing system. The 3M disc buoy carried Zeno 3200, MCCB, Orbcomm, Global Star and Bluetooth module. The deployments have relied on Orbcomm and Global Star as the primary satellite communications system. In addition to detailing our practical experience in the use of Orbcomm and Global Star as high latitudes, we will present some of scientific sensor results regarding real-time oceanographic and meteorological parameters such as wind speed, wave height and etc. In this paper we present the design and implementation of a small-scale buoy sensor network. One of the major challenges is that the network is hard to access after its deployment and hence both hardware and software must be robust and reliable.
A study on the Robust and Systolic Topology for the Resilient Dynamic Multicasting Routing Protocol
Lee, Kang-Whan ; Kim, Sung-Uk ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 255~260
In the recently years, there has been a big interest in ad hoc wireless network as they have tremendous military and commercial potential. An Ad hoc wireless network is composed of mobile computing devices that use having no fixed infrastructure of a multi-hop wireless network formed. So, the fact that limited resource could support the network of robust, simple framework and energy conserving etc. In this paper, we propose a new ad hoc multicast routing protocol for based on the ontology scheme called inference network. Ontology knowledge-based is one of the structure of context-aware. And the ontology clustering adopts a tree structure to enhance resilient against mobility and routing complexity. This proposed multicast routing protocol utilizes node locality to be improve the flexible connectivity and stable mobility on local discovery routing and flooding discovery routing. Also attempts to improve route recovery efficiency and reduce data transmissions of context-awareness. We also provide simulation results to validate the model complexity. We have developed that proposed an algorithm have design multi-hierarchy layered networks to simulate a desired system.
A Simplified Efficient Algorithm for Blind Detection of Orthogonal Space-Time Block Codes
Pham, Van Su ; Mai, Linh ; Lee, Jae-Young ; Yoon, Gi-Wan ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 261~265
This work presents a simplified efficient blind detection algorithm for orthogonal space-time codes(OSTBC). First, the proposed decoder exploits a proper decomposition approach of the upper triangular matrix R, which resulted from Cholesky-factorization of the composition channel matrix, to form an easy-to-solve blind detection equation. Secondly, in order to avoid suffering from the high computational load, the proposed decoder applies a sub-optimal QR-based decoder. Computer simulation results verify that the proposed decoder allows to significantly reduce computational complexity while still satisfying the bit-error-rate(BER) performance.
Design of Signal Conversion module for T-DMB system
Kim, Jung-Tae ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 266~269
Layered structure of the Korean terrestrial Digital Multimedia Broadcasting (TDMB) transmission system for multimedia broadcasting service is presented in this paper. We made a switching module which is called the Ensemble Remultiplexer. It is designed to remultiplex the Ensemble Transport Interface (ETI) for T-DMB service. This paper describes the remultiplexing process of the Ensemble Remultiplexer.
Design of Circuit for a Fingerprint Sensor Based on Ridge Resistivity
Jung, Seung-Min ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 270~274
This paper proposes an advanced signal processing circuit for a fingerprint sensor based on ridge resistivity. A novel fingerprint integrated sensor using ridge resistivity variation resulting from ridges and valleys on the fingertip is presented. The pixel level simple detection circuit converts from a small and variable sensing current to binary voltage out effectively. The sensor circuit blocks were designed and simulated in a standard CMOS 0.35
Design of a Frequency Locked Loop Circuit
Choi, Jin-Ho ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 275~278
In this paper, I propose the full CMOS FLL(frequency locked loop) circuit. The proposed FLL circuit has a simple structure which contains a FVC(frequency-to-voltage converter), an operational amplifier and a VCO(voltage controlled oscillator). The operation of FLL circuit is based on frequency comparison by the two FVC circuit blocks. The locking time of FLL is short compared to PLL(phase locked loop) circuit because the output signal of FLL is synchronized only in frequency. The circuit is designed by 0.35
process and simulation carried out with HSPICE. Simulation results are shown to illustrate the performance of the proposed FLL circuit.
A Study on Iconic Animation based on Object Modeling Technique
Joung, Suck-Tae ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 279~284
We propose the iconic animation of the software requirement specifications by using the object and dynamic models of the object modeling technique(OMT) methodology. In order to produce the iconic animation, we use "graphical classes" and "icon transformations." In general, the graphical classes are defined for each class of the object diagram. The icon transformations which show the activities of the application are constructed by considering the meaning of the activities and are defined by either basic or compound icons. The icon transformations are added to the state diagrams to generate extended state diagrams. The animation system generates the header files and the code instantiating GUI from the object diagram having graphical classes. The system also generates "event methods" from the extended state diagrams. When the event methods are executed, the behavior of the events is animated by the icon transformations.
A Design of a 8-Thread Graphics Processor Unit with Variable-Length Instructions
Lee, Kwang-Yeob ; Kwak, Jae-Chang ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 285~288
Most of multimedia processors for 2D/3D graphics acceleration use a lot of integer/floating point arithmetic units. We present a new architecture with an efficient ALU, built in a smaller chip size. It reduces instruction cycles significantly based on a foundation of multi-thread operation, variable length instruction words, dual phase operation, and phase instruction's coordination. We can decrease the number of instruction cycles up to 50%, and can achieve twice better performance.
A Design of a Mobile Graphics Accelerator based on OpenVG 1.0 API
Kwak, Jae-Chang ; Lee, Kwang-Yeob ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 289~293
In this paper, we propose the hardware architecture to accelerate 2D Vector graphics process for mobile devices. we propose the Transformation Unit Architecture that considerates the operation dependency. It has 3 cycles excution time and uses 2 multipliers and 2 adders. Proposed paint generation unit uses a LUT method, so it does not execute color interpolation which needs to be calculated every time. The proposed OpenVG 1.0 Accelerator achieved a 2.85 times faster performance in a tiger model.
Active Response Model and Scheme to Detect Unknown Attacks
Kim, Bong-Han ; Kim, Si-Jung ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 294~300
This study was conducted to investigate what to consider for active response in the intrusion detection system, how to implement active response, and 6-phase response models to respond actively, including the active response scheme to detect unknown attacks by using a traffic measuring engine and an anomaly detection engine.
PDM ZCS Resonant High Frequency Inverter for Induction Heated Roller
Kang, Shin-Chul ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 301~304
This paper presents a lossless inductor snubber-assisted series resonant high frequency inverter using the trench gate IGBTs for the electromagnetic induction eddy current-heated fixing roller in copy and printing machines in a new generation. This soft switching high-frequency inverter can completely achieve zero current soft switching (ZCS) commutation mode transitions and wide power regulation under its constant frequency pulse density modulation (PDM) scheme. Its transient and steady state operating principle is originally presented for a constant frequency PDM strategy under a ZCS operation, together with its output power regulation characteristics-based on the pulse density modulation. The effectiveness of this soft switching high-frequency inverter is confirmed for the fixing equipment with the induction-heated fixing roller.
Novel Electromagnetic Induction Eddy Current DPH based Continuous Pipeline Fluid Heating using Soft Switching PWM High Frequency Inverter
Nam, Jing-Rak ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 305~309
This paper presents an innovative prototype of a new conceptual electromagnetic induction eddy current based fluid heating appliance using voltage-fed quasi resonant zero voltage soft switching PWM high-frequency inverter using IGBTs, which can operate at a constant frequency variable power regulation scheme. The promising simple high efficient low noise inverter type electromagnetic induction eddy current based pipeline fluid heating appliance is proposed for saturated steam generator, superheated steam generator, hot water and hot air producer, metal catalyst heating for exhaust gas cleaning in engine. Under these technological backgrounds, a novel electromagnetic induction eddy current Dual Packs Heater(DPH) based pipeline fluid heating incorporates thin metal layer type package for continuous fluid heating appliances applying two types of voltage-fed quasi load resonant ZVS-PWM high frequency inverter. The unique features of a novel electromagnetic induction eddy current DPH based continuous pipeline fluid heating appliance is illustrated on the basis of simulation and discussed for the steady state operating characteristics and experimental results.
Adaptive States Feedback Control of Unknown Dynamics Systems Using Support Vector Machines
Wang, Fa-Guang ; Kim, Min-Chan ; Park, Seung-Kyu ; Kwak, Gun-Pyong ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 310~314
This paper proposes a very novel method which makes it possible that state feedback controller can be designed for unknown dynamic system with measurable states. This novel method uses the support vector machines (SVM) with its function approximation property. It works together with RLS (Recursive least-squares) algorithm. The RLS algorithm is used for the identification of input-output relationship. A virtual state space representation is derived from the relationship and the SVM makes the relationship between actual states and virtual states. A state feedback controller can be designed based on the virtual system and the SVM makes the controller with actual states. The results of this paper can give many opportunities that the state feedback control can be applied for unknown dynamic systems.
Measurement of Leukocyte Motions in a Microvessel Using Spatiotemporal Image Analysis
Kim, Jin-Woo ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 315~319
This paper describes a method for recognizing and measuring the motion of each individual leukocyte in microvessel from a sequence of images. A spatiotemporal image is generated whose spatial axes are parallel and vertical to vessel region contours. In order to enhance and extract only leukocyte traces with a turned velocity range even under noisy background, we use a combination of a filtering process using Gabor filters with sharp orientation selectivity and a subsequent 3D spatiotemporal grouping process. The proposed method is shown to be effective by experiments using image sequences of two kinds of microcirculation, rat mesentery microvessels and human retinal capillaries.
Efficient Piecewise-Cubic Polynomial Curve Approximation Using Uniform Metric
Kim, Jae-Hoon ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 320~322
We present efficient algorithms for solving the piecewise-cubic approximation problems in the plane. Given a set D of n points in the plane, we find a piecewise-cubic polynomial curve passing through only the points of a subset S of D and approximating the other points using the uniform metric. The goal is to minimize the size of S for a given error tolerance
, called the min-# problem, or to minimize the error tolerance
for a given size of S, called the min-
problem. We give algorithms with running times O(
logn) and O(
) for both problems, respectively.
The Effect of Project Complexity, Team Members' Structure, and Process Index on Efficiency of System Integration Projects
Hong, Han-Kuk ; Park, Chul-Jae ; Leem, Byung-Hak ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 323~326
Data Envelopment Analysis (DEA) is a theoretically sound framework for performance analysis that offers many advantages over traditional methods such as performance ratios and regression analysis. Largely the result of multidisciplinary research during the last three decades in economics, engineering and management, DEA is best described as an effective new way of visualizing and analyzing performance data. Besides, overseas information technology companies have aggressively tried to enter the domestic market. In the age of globalization and high competition, it is imperative that the system integration (SI) companies need to introduce the performance evaluation models of SI projects, including Capability Maturity Model and Software Process Improvement and Capability Determination, to gain a competitive advantage. Therefore, it makes our research regarding evaluation of SI projects very opportune. The purpose of the study is not only to evaluate efficiency of each project by DEA but also to gain insight into various factors such as project complexity, team members' man-months structure, and process index(project management index) that link to the projects performance.
Design and Implementation of Transfer Buffer Sharing Technique for Efficient Massive Data Transfer
Cho, Dae-Soo ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 327~330
It is required that a server which communicates with various client simultaneously should have an efficient data transfer model. In Windows
environment, the server was generally developed based on IOCP model. Developing the IOCP model, the server generally has one data transfer buffer per client. If the server divides a larger data than the transfer buffer into several fragments, there used to be a problem in sending it to a client, because there is a conflict in a data transfer buffer. That is, CPU requests one data-fragment transfer, then it will request the next data-fragment transfer successively before completing the previous request, owing to the property of overlapped IO model. In this paper, we proposed the transfer buffer sharing technique to solve the conflicting problem. The experimental result shows that the performance of data transfer was enhanced by 39% maximally.
Multiple Moving Person Tracking Based on the IMPRESARIO Simulator
Kim, Hyun-Deok ; Jin, Tae-Seok ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 331~336
In this paper, we propose a real-time people tracking system with multiple CCD cameras for security inside the building. To achieve this goal, we present a method for 3D walking human tracking based on the IMPRESARIO framework incorporating cascaded classifiers into hypothesis evaluation. The efficiency of adaptive selection of cascaded classifiers has been also presented. The camera is mounted from the ceiling of the laboratory so that the image data of the passing people are fully overlapped. The implemented system recognizes people movement along various directions. To track people even when their images are partially overlapped, the proposed system estimates and tracks a bounding box enclosing each person in the tracking region. The approximated convex hull of each individual in the tracking area is obtained to provide more accurate tracking information. We have shown the improvement of reliability for likelihood calculation by using cascaded classifiers. Experimental results show that the proposed method can smoothly and effectively detect and track walking humans through environments such as dense forests.
Controlling Spillway Gates of Dams Using Dynamic Fuzzy Control
Woo, Young-Woon ; Han, Soo-Whan ; Kim, Kwang-Baek ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 337~342
Controlling spillway gates of dams is a complex, nonlinear, non-stationary control process and is significantly affected by hydrological conditions which are not predictable beforehand. In this paper, control methods based on dynamic fuzzy control are proposed for the operation of spillway gates of dams during floods. The proposed methods are not only suitable for controlling spillway gates but also able to maintain target water level in order to prepare a draught. In the proposed methods, we use dynamic fuzzy control that the membership functions can be varied by changing environment conditions for keeping up the target water level, instead of conventional static fuzzy control. Simulation results demonstrate that the proposed methods based on dynamic fuzzy control produce an accurate and efficient solution for both of controlling spillway gates and maintaining target water level defined beforehand.
Dynamic Adjustment of Ad hoc Traffic Indication Map(ATIM) window to save Power in IEEE 802.11 DCF
Nam, Jae-Hyun ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 343~347
Wakeup schemes that turn off sensors' radio when communication is not necessary have great potential in energy saving. At the start of each beacon interval in the IEEE 802.11 power saving mode specified for DCF, each node periodically wakes up for duration called the ATIM Window. However, in the power saving mechanism specified in IEEE 802.11, all nodes use the same ATIM window size. Since the ATIM window size critically affects throughput and energy consumption, a fixed ATIM window does not perform well in all situations. This paper proposes an adaptive mechanism to dynamically choose an ATIM window size according to network condition. Simulation results show that the proposed scheme outperforms the IEEE 802.11 power saving mechanism in terms of the amount of power consumed and the packet delivery ratio.
A Study of a Secure Mobile Agent Services Based on Grid Proxy Gateway
Lee, Se-Yul ; Choi, Gyoo-Seok ; Kim, Chang-Su ; Jung, Hoe-Kyung ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 348~352
In distributed computing paradigm, mobile surrogate systems migrates from on host in a network to another. However, Mobile surrogate system have not gained wide acceptance because of security concerns that have not been suitably addressed yet. In this paper, we propose a security framework based on Grid Proxy Gateway for mobile Grid service. The current Grid Security Infrastructure is extended to mobile computing environments. The surrogate host system designed for mobile Personal Digital Assistant (PDA) users can access the certified host and get his proxy credential to launch remote job submission securely.
Compensation Algorithm of Arrival Time Mismatch in the Space-Time Coded Systems
Kim, Min-Hyuk ; Choi, Suk-Soon ; Jung, Ji-Won ; Lee, Seong-Ro ; Cho, Han-Na ; Choi, Myeong-Soo ;
Journal of information and communication convergence engineering, volume 6, issue 3, 2008, Pages 353~357
One objective in developing the next generation of wireless communication systems is to increase data rates and reliability. A promising way to achieve this is to combine multiple-input and multiple-output signal processing with a space-time coding scheme, which offers higher coding and diversity gains and improves the spectrum efficiency and reliability of a wireless communication system. It is noted, however, that time delay differences and phase differences among different channels increase symbol interference and degrade system performance. In this letter, we investigate phase differences and their effects on multiple-input and multiple-output systems, and propose a compensation algorithm for the Rayleigh fading model to minimize their effects.