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Chaotic watermarking algorithm based on space-time-coded matrix and linear decimation

Journal of Information and Computational Science 2008年第6期5卷 2489-2494页

作者： Deng, Hongmin Li, Tao Wang, Qionghua Li, Hongbin School of Electronics and Information Engineering Sichuan University Chengdu 610065 China Computer Science Department Sichuan University Chengdu 610065 China School of Electronics and Information Engineering Sichuan University Chengdu 610065 China ECE Department Stevens Institute of Technology Hoboken NJ07030 United States

A novel digital watermarking algorithm based on space time coding (STC) and linear decimation (LD) techniques in communication is proposed in the wavelet domain. The watermark after STC and LD is embedded in the wavelet coefficients of the host image through chaotic modification. Simulation results show that it is not only robust against some attacks such as local cropping in varying degrees, but also has high security. This demonstrates the efficiency of our watermarking algorithm. © 2008 Binary Information Press December 2008.

关键词： Wavelet transforms

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Centre of gravity movement as redundant pitch attitude control in control allocation

Centre of gravity movement as redundant pitch attitude contr...

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作者： Ahmad, Hammad Young, Trevor M. Toal, Daniel Omerdic, Edin Department of Mechanical and Aeronautical Engineering University of Limerick Ireland Department of Electronics and Computer Engineering University of Limerick Ireland M and AE Dept. University of Limerick Ireland ECE Dept. University of Limerick Ireland

ISBN: (纸本)9781563479458

This paper addresses the use of centre of gravity (cg) of the aircraft by moving fuel to and fro the trim tank;this cg movement is exploited as an additional pitch control redundancy. In the high speed region of the flight envelope, the full utilization of the flight controls is not possible due to load factor limitations, so this redundancy can be used as a compensation system. Control allocation in aircraft is the distribution of settings for various control surfaces to achieve virtual control demands (i.e. pitch, roll and yaw moments, and forces). To achieve a control demand there are two or more surfaces that can be utilized. In this paper control law was designed as a multivariable proportional integral controller;the output of it (i.e. virtual control demands) is sent to a control allocation module, which distributes the demand among the control surfaces by solving a sequential least squares problem using the active set method. The control system (i.e. control law and control allocation) is applied to the nonlinear model of the Boeing 747-200. The system was also tested on a nonlinear model with changes in longitudinal aerodynamics coefficients due to the wing damage, which is based on the damage that arose on EL AL Flight 1862 accident Schiphol airport near Amsterdam. The reduced effectiveness of longitudinal control surfaces due to a loss of hydraulics in this crash is also realized in the control allocation. © 2008 by the American Institute of Aeronautics and Astronautics, Inc.

关键词： Controllers

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MEMS accelerometer driven fuel control system for automobile applications

MEMS accelerometer driven fuel control system for automobile...

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Smart Structures, Devices, and Systems IV

作者： Mukhiya, R. Gangopadhyay, S. Guha, B. Bhattacharyya, T.K. Boni, A. Zen, M. Lahiri, S.K. Electronics and ECE Department/ATDC Indian Institute of Technology Kharagpur 721 302 India Department of Engineering and Computer Science University of Trento Povo Trento Italy FBK-irst Povo Trento I-38100 Italy

In this paper, a novel MEMS accelerometer based fuel control system for automobile applications has been presented, primarily to be used in Engine Control Unit (ECU). It consists of a MEMS accelerometer inertial sensor for acceleration/velocity measurement of automobile followed by a dedicated signal conditioning unit, data converter and fuel control unit. MEMS accelerometer implemented in this work is an application specific low-g single axis piezoresistive bulk micromachined device with very low cross-axis sensitivity, and fabricated using post-process CMOS compatible dual-dope (Silicic acid +Ammonium per Sulphate) TMAH anisotropic etching. Signal conditioning circuit is a chopper stabilized (CS) low noise amplifier suitable for low frequency low amplitude signal amplification. Data converter is a low power, 6-bit successive approximation (SAR) ADC. Circuit is designed in 0.18 μm CMOS technology. PID based control unit, which regulates the duration of fuel injection depending on the driver's request in real time for optimal efficiency and minimal pollution, has been developed in Simulink module. © 2008 SPIE.

关键词： Sulfur compounds

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Merged three-terminal magnetotransistor based on the carrier Recombination-Deflection effect

Merged three-terminal magnetotransistor based on the carrier...

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2008 IEEE Sensors, SENSORS 2008

作者： Leepattarapongpan, Chana Penpondee, Naritchapan Phetchakul, Toempong Phengan, Weera Chaowicharat, Eakalak Hruanun, Charndet Poyai, Amporn Thai Microelectronics Center National Electronics and Computer Technology Center Chachoengsao Thailand Electronic research center Department of ElectronicFaculty of Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok Thailand

ISBN: (纸本)9781424425808

This article presents a merged three terminals magnetotransistor based on the carrier recombination - deflection effect. This particular magnetotransistor structure relies on the combination of difference of base current and collector current in +x and -x directions. As a result, the output voltage and absolute sensitivity to magnetic field will be double. The structure of magnetotransistor consists of oneemitter, two collector and two base contacts. The devices can detect magnetic field in vertical direction (BZ) by relying on the difference between base current and collector current (°ICB). From the experiment, with emitter current at 5, 8, and 10 mA, the magnetotransistor had the highest sensitivity of 1.125mV/mT when emitter current was at 10 mA. © 2008 IEEE.

关键词： Magnetic fields

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A complete analytic surface potential-based core model for undoped cylindrical surrounding-gate MOSFETs

A complete analytic surface potential-based core model for u...

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2008 NSTI Nanotechnology Conference and Trade Show, NSTI Nanotech 2008 Joint Meeting, Nanotechnology 2008

作者： Jin, He Jian, Zhang Lining, Zhang Chenyue, Ma Mansun, Chan School of Computer and Information Engineering Peking University Shenzhen Graduate School Shenzhen 518055 China Institute of Microelectronics EECS Peking University Beijing 100871 China Department of ECE Hong Kong University of Science and Technology Clearwater Bay Kowloon Hong Kong

ISBN: (纸本)9781420085075

An analytic surface potential-based non-charge-sheet core model for cylindrical undoped surrounding-gate (SRG) MOSFETs is presented in this brief. Starting from the exact surface potential solution of the Poisson's equation in the cylindric surrounding-gate (SRG) MOSFETs, a single set of the analytic drain current expression in terms of the surface potential evaluated at the source and drain ends is obtasined from the Pao-Sah's dual integral without the charge-sheet approximation. It is shown that the derived drain current model is valid for all operation regions, allowing the SRG-MOSFET characteristics to be adequately described from the linear to saturation and from the sub-threshold to strong inversion region without fittingparameters. Moreover, the model prediction is also be verified by the 3-D numerical simulation.

关键词： Drain current

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Editorial introduction for the special issue on sensors for microfluidic analysis systems

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IEEE Sensors Journal 2008年第5期8卷 427-429页

作者： Nagle, H. Troy Fair, Richard B. Shannon, Mark A. Tan, Ooi Kiang Geschke, Oliver Ahn, Chong H. Kaynak, Okyay Vellekoop, Michael J. Duke University Department of Electrical and Computer Engineering Durham NC 27708 United States University of Illinois at Urbana-Champaign Department of Mechanical Engineering Urbana IL 61801-2906 United States Nanyang Technological University Division of Microelectronics School of Electrical and Electronic Engineering Singapore 639798 Singapore Technical University of Denmark Department of Micro- and Nanotechnology Kongens Lyngby DK-2800 Denmark University of Cincinnati Department of Electrical and Computer Engineering and Computer Science Cincinnati OH 45221-0030 United States Bogazici University Department of Electrical and Electronics Engineering Istanbul 34342 Turkey Vienna University of Technology Institute of Sensor and Actuator Systems Vienna A-1040 Austria Department of Electrical and Computer Engineering Duke University Electrochemical Society Department of Mechanical Engineering University of Illinois at Urbana-Champaign Urbana IL United States National Science Foundation Science and Technology Center WaterCAMPWS Micro-Nano-Mechanical Systems Laboratory Nanyang Technological University School of Electrical and Electronic Engineering Department of Electrical and Computer Engineering and Computer Science University of Cincinnati Cincinnati OH United States Departments of Electrical Engineering and Biomedical Engineering Microsystems and BioMEMS Laboratory Univensity of Cincinnati Departments of Electrical and Electronics Engineering Bogazici University Istanbul Turkey UNESCO Mechatronics Research and Annlication Centre Vienna Austria Department of Industrial Sensor Systems Institute of Sensor and Actuator Systems Vienna University of Technology Vienna Austria

No abstract available

关键词： Special issues and sections Sensor systems Microfluidics microelectronics USA Councils Mechanical engineering Actuators Fabrication Biosensors Ferroelectric materials

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GPS based naval navigation system on Pocket PC platform

GPS based naval navigation system on Pocket PC platform

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Mediterranean Electrotechnical Conference (MELECON)

作者： Miroslav Lakotic Zeljka Mihajlovic Department of Electronics MicroelectronicsComputer and Intelligent SystemsFaculty of Electrical Engineering and Computing University of Zagreb Zagreb Croatia

This paper presents a GPS based system for naval navigation and the development process of such system. In this paper path finding algorithm for naval navigation is proposed that is appropriate for implementation on pocket PC device. The implementation of the proposed system requires some specific adapting of a number of other algorithms and methods to run well on embedded systems like pocket PC device. Experimental results are presented using developed configuration. Adriatic coast is used as surroundings, because it is highly indented, so it presents one of the most demanding challenges.

关键词： Global positioning system Distance measurement Mathematical model Navigation Geographic information systems Protocols Equations

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Low Vt Gate-First Al/TaN/[Ir3Si-HfSi2−x]/HfLaON CMOS Using Simple Laser Annealing/Reflection

Low Vt Gate-First Al/TaN/[Ir3Si-HfSi2−x]/HfLaON CMOS Using ...

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Symposium on VLSI Technology

作者： C. C. Liao Albert Chin N. C. Su M.-F. Li S. J. Wang E. E. Department National Chiao Tung University Hsinchu Taiwan Institute of Microelectronics Department of Electronics Engineering National Chiao Tung University Tainan Taiwan Microelectronics Department Fudan University Shanghai China SNDL ECE Department National University of Singapore Singapore

We report low V t Al/TaN/[Ir 3 Si-HfSi 2-x ]/HfLaON CMOS using simple laser annealing/reflection with self-aligned and gate-first process compatible with current VLSI. At 1.05 nm EOT, good phi m-eff of 5.04 and 4.24 eV, low V t of -0.16 and 0.13 V, high mobility of 85 and 209 cm 2 /Vs, and small 85degC BTI les40 mV (10 MV/cm, 1 hr) are measured for p- and n-MOS.

关键词： Logic gates Lasers Annealing Silicon CMOS integrated circuits Reflection Semiconductor lasers

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Analysis of an agent-based m-learning system

Analysis of an agent-based m-learning system

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Mediterranean Electrotechnical Conference (MELECON)

作者： Vlado Glavinic Marko Rosic Marija Zelic Department of Electronics MicroelectronicsComputer and Intelligent SystemsFaculty of Electrical Engineering and Computing University of Zagreb Zagreb Croatia Department of Computer Science Faculty of Natural Sciences Mathematics and Kinesiology University of Split Split Croatia

M-learning, as the ldquoportable and personalrdquo fashion of e-learning, is enhancing the efficiency and effectiveness of learning in the context of handheld terminals. Mobile intelligent tutoring systems are a particular kind of m-learning systems which base their work on simulation of a human teacher in the learning and teaching process. The systems should be able to provide intelligent support to the learners as well as adapt to different networks and mobile devices. Consequently this implies the use of an agent-based solution as architectural basis. The immediate problem is the lack of agent-based software development methodologies as well as common scenarios and templates for building multi-agent systems. This paper presents an analysis of an agent-based m-learning system. The purpose of the paper is to provide a roadmap for designers of m-learning systems based on agent technology.

关键词： Education Artificial intelligence Mobile communication Databases Servers Multiagent systems Buildings

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A combined top-down and bottom-up approach for precise placement of metal nanoparticles on silicon (vol 4, pg 330, 2008)

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SMALL 2008年第4期4卷 393-393页

作者： Choi, W. K. Liew, T. H. Chew, H. G. Zheng, F. Thompson, C. V. Wang, Y. Hong, M. H. Wang, X. D. Li, L. Yun, J. Microelectronics Laboratory Department of Electrical and Computer Engineering National University of Singapore 117576 Singapore Singapore Fax: (+65) 677-911-03 Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA ECE-DSI Laser Microprocessing Laboratory Department of Electrical and Computer Engineering National University of Singapore 117576 Singapore Singapore Advanced Materials for Micro- and Nano-Systems Singapore-MIT Alliance 117576 Singapore Singapore

A combined top-down and bottom-up approach was used for precise placement of metal nanoparticles on silicon substrates. The study used laser interference lithography (LIL) technique, to open windows on a silicon wafer with a silicon oxide mask. Inverted pyramids were obtained at the window region, by etching the silicon wafer in KOH under the top-down approach. The bottom-up approach involved the evaporation of a gold (Au) layer on the whole silicon wafer and annealing at elevated temperature. The Au inside the inverted pyramids was coarsened and formed Au dots inside them. The results show that the diameter of the metal nanoparticles can be tuned more effectively, by changing the Au layer thickness, along with the annealing temperature.

关键词： gold nanolithography nanomanipulation nanoparticles silicon surfaces

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