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IEEE Workshop on Signal Propagation on Interconnects (SPI)

作者： R. Ouchen A. Hamouda A. Wiener R. Arnold N. Bouguechal O. Manck Advanced Electronics Laboratory Department of Electronics Faculty of Engineering University of Batna Algeria Institute of Computer Engineering and Microelectronics Technical University Berlin Germany

The paper emphasizes the circuit innovations of a key analog function realized on the IAD GmbH DLC_2 family chip, a precision programmable voltage reference with superior performance capabilities dedicated for an integrated 10 bits D/A converter. The chip developed in co-operation of IAD and MAZ Brandenburg has been produced with 0.35 mum CMOS switched capacitor technology from AMS, it can be used on the one hand within typical power-line applications, such us controlling and management, and the other hand for data communication, such as telephony or internet access. The programmable voltage reference is based on a new design that provides fast programmability between voltages and stable voltage operation from 0.25 Vdda to 0.75 Vdda. The main objective is to select a design that meets as close as possible criteria related to the chip specification requirements such as reliability, flexibility, and integration area. Consequently, an adequate programmable voltage reference is proposed which is 4 bits decoder-based converter architecture

关键词： Voltage CMOS technology Circuits Technological innovation Communication switching Capacitors Communication system control Energy management Technology management Data communication

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Measured disturbance estimation for model predictive controller

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Mediterranean Journal of Measurement and Control 2006年第3期2卷 144-151页

作者： Kulcsar, Balazs Bokor, J. Department of Transport Automation Faculty of Transportation Engineering Budapest University of Technology and Economics Budapest Hungary System and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Budapest Hungary

This paper presents the Model Predictive Controller design process when an unknown input observer provides measured disturbance form unmeasured one. Instead of using an unmeasured disturbance dynamic implemented into the controller, the joint observer-controller uses the estimated measured exogenous disturbance signal. Furthermore the observer can send an alarm sign to the supervisor. The detection and isolation of the unmeasured disturbance is computed by the geometric based strategy called Fundamental Problem in Residual Generation. Better the estimation of the disturbance is, better the rejection of the controller. The measured disturbance could be anticipated. A numerical example explains the effectiveness of the estimation and the usage of the unmeasured disturbance detection. Copyright © 2006 SoftMotor Ltd.

关键词： Predictive control systems

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Performance of OCDMA systems Using AND Subtraction Technique

Performance of OCDMA Systems Using AND Subtraction Technique

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IEEE International Conference on Semiconductor Electronics (ICSE)

作者： S.A. Aljunid Feras N. Hasson M.D.A. Samad M.K. Abdullah M. Othman S. Shaari School of Computer and Communication Engineering Northern Malaysia University College of Engineering Jejawi Perlis Malaysia Photonics Technology Laboratory (PTL) Institute of Micro Engineering and Nanoelectronics (IMEN) Universiti Kebangsaan Malaysia Bangi Selangor Darul Ehsan Malaysia Photonic Laboratory Department of Computer System and Communication Faculty of Engineering University Purda Malaysia Serdang Selangor Darul Ehsan Malaysia

A new detection scheme, namely AND subtraction technique is proposed and presented in this paper. The theory is being elaborated and experimental results have been done by comparing double-weight (DW) code against the existing code, Hadamard. In this paper we have proved that AND subtraction technique gives better bit error rates (BER) performance than Complementary subtraction technique against the received power level.

关键词： Subtraction techniques Multiple access interference Optical receivers Phase detection Error correction Error correction codes Laboratories Bit error rate Optical transmitters Multiaccess communication

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Securing UML information flow using flowUML

Securing UML information flow using flowUML

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作者： Alghathbar, Khaled Farkas, Csilla Wijesekera, Duminda Information Systems Department College of Computer and Information Sciences King Saud University P.O. Box 51178 Riyadh 11543 Saudi Arabia Information Security Laboratory Dept. of Computer Science and Engineering University of South Carolina Columbia SC 29208 Dept. of Information and Software Engineering CSIS George Mason University Fairfax VA 22030 Faculty of Information Systems Kind Saud University Riyadh Saudi Arabia Department of Computer Science and Engineering University of South Carolina Columbia Department of Information and Software Engineering George Mason University Fairfax VA George Mason University

FlowUML is a logic-based system to validate information flow policies at the requirements specification phase of UML based designs. It uses Horn clauses to specify information flow polices that can be checked against flow information extracted from UML sequence diagrams. FlowUML policies can be written at a coarse grain level of caller-callee relationships or at a finer level involving passed attributes. Copyright © 2006, Australian computer Society Inc.

关键词： Information management

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Advanced Functions of the Scanning Laser Range Sensor for Environment Recognition in Mobile Robots

Advanced Functions of the Scanning Laser Range Sensor for En...

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International Conference on Multisensor Fusion and Integration for Intelligent systems (MFI)

作者： Hirohiko Kawata Satofumi Kamimura Akihisa Ohya Jun'ich Iijima Shin'ich Yuta The Department of Computer Science University of Tsukuba Tsukuba Japan Department of Intelligent Interaction Technologies Graduate School of System and Information Engineering University of Tsukuba Tsukuba Japan The Mechanical Engineering Research Laboratory Hitachi Ltd. Hitachinaka Japan Department of Computer Science Graduate School of System and Information EngineeringGraduate School of System and Information Engineering University of Tsukuba Tsukuba Japan The Faculty of Information Science Meisei University Hino Japan

We have developed scanning laser range sensor called "SOKUIKI" sensor which is ultra-small scanning laser range sensor adopted for various types of mobile robots as we have already published. As a sensor for environment recognition, we thought the sensor must have not only outputting distance data but also another helpful function for mobile robots. So it was considered that what kind of advanced functions should be provided to SOKUIKI sensor. As a result two most important purposes were acquired. 1. Variation on its distance data and method to get the data. 2. The function for prevention of optical interference between sensors. These rolls were installed to the sensor, and confirmed their effect. This paper describes its result and proposes sensor communication interface protocol (SCIP) which is developed as new command system just for SOKUIKI sensor

关键词： Mobile robots Intelligent sensors Sensor systems Sensor fusion systems engineering and theory Optical sensors Robot sensing systems Frequency Laser fusion Sensor phenomena and characterization

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Broad and Positive Conversion Efficiency in Raman-Assisted Fiber Ring Laser

Broad and Positive Conversion Efficiency in Raman-Assisted F...

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International RF and Microwave Conference, RFM

作者： Ummi Supya Ismail Muhammad Zamzuri Abdul Kadir Zainuddin Rahman Mohd. Adzir Mahdi Sahbudin Shaari TMR&D SDN. BHD UPM-MTDC Tech Serdang Malaysia TMR&D SDN. BHD Idea Tower Incubation Center One Serdang Department of Computer and System Engineering Faculty of Engineering UPM Serdang Malaysia Dept. of Computer and System Eng. UPM Serdang Department of Electrical Electronics & System Engineering UKM Malaysia Photonic Technology Laboratory Electronics & System Eng.

One of many fiber non-linear effects is a four-wave mixing (FWM) phenomenon that is resonant when phase matching condition is satisfied. It only occurs for particular combinations of fiber dispersion and signal frequencies. In particular, phase matching is achieved for signals with very similar frequencies propagating near the zero dispersion wavelength of the fiber. This paper proposes optical wavelength conversion based on FWM assisted by Raman amplification. The conversion bandwidth extends to 125nm, the widest yet reported for wavelength conversion using highly non-linear fiber (HNLF) irrespective to the conversion efficiency value. The 1R property defined when conversion efficiency (CE) is positive was found to cover an area of 19.5nm

关键词： Fiber lasers Ring lasers Optical frequency conversion Optical wavelength conversion Wavelength conversion Four-wave mixing Resonance Optical propagation Stimulated emission Bandwidth

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Improving DVB-T for Brazilian environments

Improving DVB-T for Brazilian environments

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International Symposium on Telecommunications

作者： Cristiano Akamine Yuzo Iano Rangel Arthur Gunnar Bedicks Diogo Gara Caetano Telecommunications State University of Campinas Sao Paulo Brazil Electrical and computer engineering in Communications Department Faculty of Electrical and Computer Engineering UNICAMP Brazil DECOM FEEC UNICAMP Brazil Digital Communications Communications Systems and Transmission at Mackenzie Presbyterian University Brazil Electrical Engineering in the Communication Department of the Electrical Engineering (FEEC) and Computation Faculty University of Campinas (UNICAMP) Brazil

In this paper the improvement in the performance obtained by a Time Interleaving applied to DVB-T scheme are analyzed in impulsive noise environments. The performance is evaluated in terms of bit error rate probability for Oms, 100 ms and 200 ms of time interleaving length. The results are compared with the standard DVB-T (digital video broadcasting - terrestrial) evaluated on Impulsive Noise channel and Multipath combined with impulsive noise channel. Simulation results shows that employing Time Interleaving only with 100 ms the overall system performance can improve significantly. These results are obtained applying an appropriate interleaving after the Mapper of DVB-T system.

关键词： digital video broadcasting Additive white noise Gaussian noise Working environment noise OFDM Interleaved codes digital TV Laboratories digital communication Signal processing algorithms

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An Effective Policy Management Framework Using RBAC model for Service Platform based on Components

An Effective Policy Management Framework Using RBAC model fo...

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International Conference on Software engineering Research, Management and Applications (SERA)

作者： Eun-Ae Cho Chang-Joo Moon Dae-Ha Park Doo-Kwon Baik Software System Laboratory Department of Computer Science & Engineering Korea University Seoul South Korea Department of Computer Science Konkuk University Chungju Chungcheongbuk South Korea Department of Computer and Information Science Korea Digital University Korea University Seoul South Korea

User access control is one of the core parts in the developing Internet field. However, in home network service platform and Web service platform, there is no concrete research yet. Therefore, in this paper, we propose the supplemented authorization policy management framework based on RBAC model in the network environment, especially, OSGi service platform and Web service platform. The proposed access control framework tries to enhance the efficiency, assure the privacy, and provide the convenience at the same time. In conclusion, we provide the base to implement the service platform by proposing the effective, safe and convenient framework in authorization and user administration part

关键词： Authorization Web services Access control Authentication Object oriented modeling Home automation Privacy computer science Environmental management Application software

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Access Control Policy Management Framework based on RBAC in OSGi Service Platform

Access Control Policy Management Framework based on RBAC in ...

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International Conference on computer and Information Technology (CIT)

作者： Eun-ae Cho Chang-joo Moon Dae-ha Park Doo-kwon Baik Software System Laboratory Department of Computer Science & Engineering Korea University of Technology and Education Seoul South Korea Department of Computer Science Konkuk University Chungju Chungcheongbuk South Korea Department of Computer and Information Science Korea Digital University Seoul South Korea

The OSGi provides a service platform which ensures the interoperability between heterogeneous technologies and various devices in home network environment. Nowadays, user access control is one of the core parts which should be cleared, but there are no concrete researches yet. So in this paper, we propose a supplemented authorization policy management framework based on RBAC (Role-Based Access Control) for user access control at home network environment in which the OSGi service platform is operated. The proposed access control framework improves effectiveness, assures privacy and provides convenience at the same time. In conclusion, we provide the base to implement the effective, safe, and convenient the OSGi service platform by proposing the new framework in authorization and user administration part.

关键词： Access control Home automation Authorization Privacy Consumer electronics Authentication computer science Concrete Environmental management Information technology

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Control of a distillation column: A decentralized approach

Control of a distillation column: A decentralized approach

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IEEE International Conference on computer-Aided Design

作者： Iman Makaremi Batool Labibi Advanced Automation and Digital Control Laboratory Control Department Electrical Engineering Faculty K.N. Toosi University of Technology Tehran Iran Process Control Laboratory Control Department Electrical Engineering Faculty K.N. Toosi University of Technology Tehran Iran

This paper presents a decentralized controller for a binary distillation column. The interactions between subsystems are considered as uncertainty. Then appropriate local H infin problems are defined such that by solving them and applying the designed controller to the system, closed-loop stability and diagonal dominance are guaranteed

关键词： Distillation equipment Control systems MIMO Distributed control Uncertainty Stability digital control Automatic control Isolation technology Process control

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