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Electrical and Electronics Engineering publications abstract of: 08-2011 sorted by title, page: 0
» (Quasi 3D) Numerical simulation of operation of a capacitive type nanoparticle counter
Abstract:
 Highlights: ? A capacitive type nanodetector based is modeled by numerical simulation. ? Detector is based on counting condensated micron sized droplets. ? Electrostatic energy change during impaction results in femtofarad capacitance change. ? Detector design can be improved by assuring deep well formation of a droplet.

Autors: Operation of a nanoparticle counter is based on condensation of water on nanoparticles forming water droplets which are fed to a capacitive type detector. Impaction of a water droplet onto the water filled detector causes formation of a crater result
Appeared in: Journal of Electrostatics
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» 2011 IAS Annual Meeting [Education Department News]
Abstract:
Autors: Sottile, J.;
Appeared in: IEEE Industry Applications Magazine
Publication date: Aug 2011, volume: 17, issue:4, pages: 75 - 75
Publisher: IEEE
 
» 3D Electro-thermal modelling of bonding and metallization ageing effects for reliability improvement of power MOSFETs
Abstract:
 Highlights: ? We investigate failures of vertical power MOSFET due to metallization ageing. ? Temperature and On-resistance decrease with the increase of the bonding wire gauge. ? Also, they decrease with the increase of contact area with top metallization. ? Hot spot and thermal runaway appear earlier in case of aged device. ? The mould compound has a poor influence on device cooling is poor.

Autors: This paper presents a methodology, based on 3D electro-thermal simulation, to investigate failures of vertical power MOSFET due to metallization ageing of source terminal. Modelling steps to obtain a 3D finite element modelling of MOSFET are presente
Appeared in: Microelectronics Reliability
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» 50-Hz Frequency [History]
Abstract:
The so-called “European” frequency of 50 Hz is one of the two standard frequencies that govern the electric power supply worldwide. As with 60 Hz, the “American” standard frequency, the history of 50 Hz is also specific and characterized by its own course of development from its first use up to final standards, involving various steps in between.
Autors: Neidhöfer, Gerhard;
Appeared in: IEEE Power and Energy Magazine
Publication date: Aug 2011, volume: 9, issue:4, pages: 66 - 81
Publisher: IEEE
 
» A 3D shape segmentation approach for robot grasping by parts
Abstract:
 Highlights: ? A method for planning robot grasps across similar objects by part correspondence. ? Topological decomposition of objects enables high-level semantic grasp planning. ? Reeb graphs are used for object segmentation and grasping. ? Evaluation of part-based object recognition and grasping by part capabilities.

Autors: Neuro-psychology findings have shown that human perception of objects is based on part decomposition. Most objects are made of multiple parts which are likely to be the entities actually involved in grasp affordances. Therefore, automatic object reco
Appeared in: Robotics and Autonomous Systems
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Balancing Control Strategy for a One-Wheel Pendulum Robot Based on Dynamic Model Decomposition: Simulations and Experiments
Abstract:
A dynamics-based posture-balancing control strategy for a new one-wheel pendulum robot (OWPR) is proposed and verified. The OWPR model includes a rolling wheel, a robot body with a steering axis, and a pendulum for lateral balancing. In constructing the dynamic model, three elements are generalized in comparison with existing robotic systems: the mass and inertia of the robot body, the “I”-type pendulum, and the steering motion. The dynamics of the robot are derived using a Lagrangian formulation to represent the torques of the wheel during the rolling, yawing, and pitching of the robot body, in terms of the control inputs. The OWPR dynamics are decomposed into state-space models for lateral balancing and steering, and the corresponding controller is designed to be adaptive to changes in the state variables. Simulations and experimental studies are presented that demonstrate and verify the efficiency of the proposed models and the control algorithm.
Autors: Hongzhe Jin;Jongmyung Hwang;Jangmyung Lee;
Appeared in: IEEE/ASME Transactions on Mechatronics
Publication date: Aug 2011, volume: 16, issue:4, pages: 763 - 768
Publisher: IEEE
 
» A Biologically Inspired Measure for Coexpression Analysis
Abstract:
Two genes are said to be coexpressed if their expression levels have a similar spatial or temporal pattern. Ever since the profiling of gene microarrays has been in progress, computational modeling of coexpression has acquired a major focus. As a result, several similarity/distance measures have evolved over time to quantify coexpression similarity/dissimilarity between gene pairs. Of these, correlation coefficient has been established to be a suitable quantifier of pairwise coexpression. In general, correlation coefficient is good for symbolizing linear dependence, but not for nonlinear dependence. In spite of this drawback, it outperforms many other existing measures in modeling the dependency in biological data. In this paper, for the first time, we point out a significant weakness of the existing similarity/distance measures, including the standard correlation coefficient, in modeling pairwise coexpression of genes. A novel measure, called BioSim, which assumes values between -1 and +1 corresponding to negative and positive dependency and 0 for independency, is introduced. The computation of BioSim is based on the aggregation of stepwise relative angular deviation of the expression vectors considered. The proposed measure is analytically suitable for modeling coexpression as it accounts for the features of expression similarity, expression deviation and also the relative dependence. It is demonstrated how the proposed measure is better able to capture the degree of coexpression between a pair of genes as compared to several other existing ones. The efficacy of the measure is statistically analyzed by integrating it with several module-finding algorithms based on coexpression values and then applying it on synthetic and biological data. The annotation results of the coexpressed genes as obtained from gene ontology establish the significance of the introduced measure. By further extending the BioSim measure, it has been shown that one can effectively identify the - - variability in the expression patterns over multiple phenotypes. We have also extended BioSim to figure out pairwise differential expression pattern and coexpression dynamics. The significance of these studies is shown based on the analysis over several real-life data sets. The computation of the measure by focusing on stepwise time points also makes it effective to identify partially coexpressed genes. On the whole, we put forward a complete framework for coexpression analysis based on the BioSim measure.
Autors: Bandyopadhyay, S.;Bhattacharyya, M.;
Appeared in: IEEE/ACM Transactions on Computational Biology and Bioinformatics
Publication date: Aug 2011, volume: 8, issue:4, pages: 929 - 942
Publisher: IEEE
 
» A biomimetic reach and grasp approach for mechanical hands
Abstract:
 Highlights: ? We model a bioinspired architecture to control a full-actuated robotic hand. ? We present the way each sub-part has been designed. ? We validate our controller with the corresponding experimental site.

Autors: Reach and grasp are the two key functions of human prehension. The central nervous system controls these two functions in a separate but interdependent way. The choice between different solutions to reach and grasp an object - provided by multiple an
Appeared in: Robotics and Autonomous Systems
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A bottom-up approach for System-On-Chip reliability
Abstract:
We demonstrate here for the first time that it is possible by a bottom-up approach to build transistor- and gate-level models with enough accuracy to allow direct comparison with experimental degradations at system-level. This work opens new ways to optimize high level digital systems with respect to aging with great accuracy.
Autors: V., Huard , N., Ruiz , F., Cacho , E., Pion
Appeared in: Microelectronics Reliability
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Clipping-Based Selective-Tap Adaptive Filtering Approach to Stereophonic Acoustic Echo Cancellation
Abstract:
Stereophonic acoustic echo cancellation remains one of the challenging areas for tele/video-conferencing applications. However, the existence of high interchannel coherence between the two input signals for such systems leads to considerable degradation in misalignment convergence of the adaptive filters. We propose a new algorithm for improving the convergence performance and steady-state misalignment by considering robustness to the source position in the transmission room. We achieve this by exploiting the inherent decorrelating properties of selective-tap adaptive filtering as well as employing a variable clipping threshold for the unselected taps. Simulation results using colored noise and speech signals show an improvement over existing algorithms both in terms of convergence rate as well as steady-state normalized misalignment.
Autors: Bekrani, M.;Khong, A.W.H.;Lotfizad, M.;
Appeared in: IEEE Transactions on Audio, Speech, and Language Processing
Publication date: Aug 2011, volume: 19, issue:6, pages: 1826 - 1836
Publisher: IEEE
 
» A combined multi-channel wiener filter based noise reduction and dynamic range compression in hearing aids
Abstract:
 Highlights: ? We present signal processing algorithms related to hearing aids. ? We deal with problems such as background noise and reduced dynamic range. ? We propose a combined noise reduction and dynamic range compression scheme. ? Undesired interaction effects are avoided in the combined approach. ? Result shows less signal-to-noise ratio degradation at low signal distortion

Autors: Noise reduction (NR) and dynamic range compression (DRC) are basic components in hearing aids, but generally these components are developed and evaluated independently of each other. Hearing aids typically use a serial concatenation of NR and DRC. Ho
Appeared in: Signal Processing
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Combined Psychoacoustic Approach for Stereo Acoustic Echo Cancellation
Abstract:
Acoustic echo cancelers (AECs) are used in teleconferencing systems to reduce undesired echoes originating from coupling between the loudspeaker and the microphone. Better performance in terms of sound localization can be achieved only by using multichannel AECs. By the use of a two-channel (stereo) system, it is already possible to obtain more realistic performance than the monochannel case because listeners have more spatial information that helps to identify the speaker position. In this paper, a novel approach to stereo AEC is proposed based on a combination of psychoacoustic effects. The principle of the proposed structure is to use an approach based on the “missing-fundamental” phenomenon at low frequencies (below 500 Hz) and a modified phase modulation approach at higher frequencies. Several results are presented in terms of magnitude-squared coherence, Itakura-Saito measure, convergence speed of adaptive filters, interaural cross-correlation, and subjective evaluation, in order to confirm the validity of the proposed approach.
Autors: Cecchi, S.;Romoli, L.;Peretti, P.;Piazza, F.;
Appeared in: IEEE Transactions on Audio, Speech, and Language Processing
Publication date: Aug 2011, volume: 19, issue:6, pages: 1530 - 1539
Publisher: IEEE
 
» A Common Operator for FFT and FEC Decoding
Abstract:
In the Software Radio context, the parametrization is becoming an important topic especially when it comes to multi-standard designs. This paper capitalizes on the Common Operator technique to present new common structures for the FFT and FEC decoding algorithms. A key benefit of exhibiting common operators is the regular architecture it brings when implemented in a Common Operator Bank (COB). This regularity makes the architecture open to future function mapping and adapted to accommodated silicon technology variability through dependable design.
Autors: Malek, Naoues , Dominique, Noguet , Laurent, Alaus , Yves, Louët
Appeared in: Microprocessors and Microsystems
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A compact model for early electromigration failures of copper dual-damascene interconnects
Abstract:
A compact model for early electromigration failures in copper dual-damascene interconnects is proposed. The model is based on the combination of a complete void nucleation model together with a simple mechanism of slit void growth under the via. It is demonstrated that the early electromigration lifetime is well described by a simple analytical expression, from where a statistical distribution can be conveniently obtained. Furthermore, it is shown that the simulation results provide a reasonable estimation for the lifetimes.
Autors: R.L., de Orio , H., Ceric , S., Selberherr
Appeared in: Microelectronics Reliability
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A comparative study of jet formation and nanofiber alignment in electrospinning and electrocentrifugal spinning systems
Abstract:
 Highlights: ? Electrocentrifugal spinning is a powerful technique for spinning solution with extremely low viscosity. ? Electrocentrifugal spinning is a more suited technique for production of aligned nanofibers than electrospinning. ? The procedure of water jet formation and polymeric jet formation in electrocentrifugal spinning was considered in this study.

Autors: Electrocentrifugal spinning is a recently developed spinning system whose performance is still under investigation by researchers. In this study the process of jet formation in electrocentrifugal spinning is explored and compared to the same process
Appeared in: Journal of Electrostatics
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A comprehensive study of MEMS behavior under EOS/ESD events: Breakdown characterization, dielectric charging, and realistic cures
Abstract:
 Highlights: ? The breakdown characterization of electrostatically actuated RFMEMS switches was carried out. ? The emitted electromagnetic field during the testing was analyzed to evaluate air-breakdown occurrence. ? Possible parasitic effects on the HBM testing of MEMS devices were investigated. ? A varistor based ESD protection structure was explored.

Autors: The breakdown characterization of both out- and in-plane electrostatically actuated RF-MEMS switches with air-gaps from 1.0 to 6.7 ?m was studied. The emitted electromagnetic field during the testing was analyzed, in order to have an indication of th
Appeared in: Journal of Electrostatics
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Consensus Tree Approach for Reconstructing Human Evolutionary History and Detecting Population Substructure
Abstract:
The random accumulation of variations in the human genome over time implicitly encodes a history of how human populations have arisen, dispersed, and intermixed since we emerged as a species. Reconstructing that history is a challenging computational and statistical problem but has important applications both to basic research and to the discovery of genotype-phenotype correlations. We present a novel approach to inferring human evolutionary history from genetic variation data. We use the idea of consensus trees, a technique generally used to reconcile species trees from divergent gene trees, adapting it to the problem of finding robust relationships within a set of intraspecies phylogenies derived from local regions of the genome. Validation on both simulated and real data shows the method to be effective in recapitulating known true structure of the data closely matching our best current understanding of human evolutionary history. Additional comparison with results of leading methods for the problem of population substructure assignment verifies that our method provides comparable accuracy in identifying meaningful population subgroups in addition to inferring relationships among them. The consensus tree approach thus provides a promising new model for the robust inference of substructure and ancestry from large-scale genetic variation data.
Autors: Ming-Chi Tsai;Blelloch, G.E.;Ravi, R.;Schwartz, R.;
Appeared in: IEEE/ACM Transactions on Computational Biology and Bioinformatics
Publication date: Aug 2011, volume: 8, issue:4, pages: 918 - 928
Publisher: IEEE
 
» A constructive speed observer design for general Euler-Lagrange systems?
Abstract:
Astolfi, Ortega, and Venkatraman (2010) recently proved the existence of a globally exponentially convergent speed observer for general Euler-Lagrange systems. Key to their result, is a function defined by certain integrals which cannot be solved a priori, and may not have explicit analytic solutions. In this paper, this obstacle to a constructive design is removed and equations that solve the speed observer problem are given in closed form. The design is further simplified by removing up to one third of the observer states used in Astolfi et al. (2010). With the significant reduction in complexity, the new observer is easily applied...
Autors: Øyvind Nistad, Stamnes , Ole Morten, Aamo , Glenn-Ole, Kaasa
Appeared in: Automatica
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Controller Design for Micro-Capsule Active Matrix Electrophoretic Displays
Abstract:
The active matrix electrophoretic display (AMEPD) has been commonly used for the applications of smart handheld reading devices such as e-books and e-news. This paper presents a new minimized waveform lookup-table that significantly reduces the table size of the conventional one by times, where is the number of gray levels. The smaller size implies that more driving waveforms can be stored. The prototyped controller has connected to a 6-in AMEPD panel, and an excellent display quality has demonstrated the effectiveness of the proposed controller design.
Autors: Lu, C.-M.;Wey, C.-L.;
Appeared in: Journal of Display Technology
Publication date: Aug 2011, volume: 7, issue:8, pages: 434 - 442
Publisher: IEEE
 
» A dielectric-based combined horizontal sensor for on-the-go measurement of soil water content and mechanical resistance
Abstract:
Precision agriculture is drawing widespread attention and increasing interest in the use of on-the-go sensors to extract soil and plant information. This new trend is evident from an increased number of (tillage) studies concerning the development of sensors for measuring physical soil properties. In this study, a new dielectric-based horizontal sensor was designed and stationary calibrated in pots for measurement of volumetric soil water content. Subsequently, the sensor was combined with a load cell and installed on a tine with thickness of 25mm, and its dynamic performance was assessed. The load cell behind the tine measures horizontal soil mechanical resistance....
Autors: M., Naderi-Boldaji , A., Sharifi , B., Jamshidi , M., Younesi-Alamouti , S., Minaee
Appeared in: Sensors and Actuators A: Physical
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A fast and efficient technique to apply Selective TMR through optimization
Abstract:
 Highlights: ? We have proposed a new technique to apply Selective TMR. ? We have defined a set of topological criteria to model circuits statically. ? We have used an optimization algorithm to automate the whole process. ? The model has been tested on a large number of examples and a real case study (FFE).

Autors: Fault tolerance is an important factor for circuits in critical applications, especially those working in harsh environments. There are many techniques to increase reliability of circuits, being those based on redundancy very popular. In this way, Tr
Appeared in: Microelectronics Reliability
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Flight to Quality
Abstract:
Early Airplanes had very few loads that required electrical power. Batteries supplied a few amps for radio communications and a couple of cockpit lights. Later, alternators were employed on piston engine airplanes to generate more electrical power. As aircraft evolved, increasing amounts of electrical power were required, and power quality standards were introduced to govern the distributed airplane voltage and frequency. Those standards specified either a 28-V dc system or a three-phase system with a regulated voltage at a constant frequency.
Autors: Said, W.;
Appeared in: IEEE Power and Energy Magazine
Publication date: Aug 2011, volume: 9, issue:4, pages: 38 - 45
Publisher: IEEE
 
» A Generic Framework for Three-Factor Authentication: Preserving Security and Privacy in Distributed Systems
Abstract:
As part of the security within distributed systems, various services and resources need protection from unauthorized use. Remote authentication is the most commonly used method to determine the identity of a remote client. This paper investigates a systematic approach for authenticating clients by three factors, namely password, smart card, and biometrics. A generic and secure framework is proposed to upgrade two-factor authentication to three-factor authentication. The conversion not only significantly improves the information assurance at low cost but also protects client privacy in distributed systems. In addition, our framework retains several practice-friendly properties of the underlying two-factor authentication, which we believe is of independent interest.
Autors: Huang, Xinyi;Xiang, Yang;Chonka, Ashley;Zhou, Jianying;Deng, Robert H.;
Appeared in: IEEE Transactions on Parallel and Distributed Systems
Publication date: Aug 2011, volume: 22, issue:8, pages: 1390 - 1397
Publisher: IEEE
 
» A Growing Digital Divide: Internet Freedom and the Negative Impact of Command-and-Control Networking
Abstract:
There is a growing consensus that communications is a fundamental right. However, achieving digital equality in the broadband age has become considerably more complex than just universal access. This article offers a more nuanced perspective on the widening digital divide that's centered on a user's utility of a broadband connection and outlines networking technologies that place control in users' hands.
Autors: Meinrath, Sascha D.;Losey, James;Lennett, Benjamin;
Appeared in: IEEE Internet Computing
Publication date: Aug 2011, volume: 15, issue:4, pages: 75 - 79
Publisher: IEEE
 
» A high performance inverted organic light emitting diode using an electron transporting material with low energy barrier for electron injection
Abstract:
image

Autors:

Graphical abstract

 Graphical abstract: . Highlights: ? A high performance inverted OLED for flexible electronics is demonstrated. ? Efficient electron injection from ITO was achieved by using n-doping of electron transporting layer. ? Low en
Appeared in: Organic Electronics
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A high quality and small shadow size visual secret sharing scheme based on hybrid strategy for grayscale images
Abstract:
Many secret sharing schemes for digital images have been developed in recent decades. Traditional schemes typically must deal with the problem of computational complexity, and other visual secret sharing schemes come with a higher transmission cost and storage cost; that is, each shadow size is m times as big as the original secret image. The new (2,n) secret sharing scheme for grayscale images proposed in this paper is based a combination of acceptable image quality using block truncation coding (BTC), high compression ratio discrete wavelet transform (DWT) and good subjective performance of the vector quantization (VQ) technique. Experimental results confirm...
Autors: T. Hoang Ngan, Le , Chia-Chen, Lin , Chin-Chen, Chang , Hoai Bac, Le
Appeared in: Digital Signal Processing
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Linear Neural Network-Based Approach to Stereophonic Acoustic Echo Cancellation
Abstract:
We propose a new adaptive filtering algorithm for stereophonic acoustic echo cancellation. This algorithm uses a linear single-layer feedforward neural network to efficiently decorrelate the tap-input vectors. It achieves an improvement in the misalignment convergence by means of applying the resulted decorrelated tap-input vectors to the coefficient update of the adaptive filters. The advantage of our approach as compared with existing techniques is that our algorithm, in use with the nonlinear preprocessor, can achieve a high rate of misalignment convergence without significantly degrading the quality and stereophonic image of the transmitted signals since our neural network operates on the tap-input vectors as opposed to the transmitted audio signals. We then show that we can achieve an efficient implementation for the proposed decorrelation method by considering the structure of the joint-input covariance matrix of the stereophonic signals.
Autors: Bekrani, M.;Khong, A.W.H.;Lotfizad, M.;
Appeared in: IEEE Transactions on Audio, Speech, and Language Processing
Publication date: Aug 2011, volume: 19, issue:6, pages: 1743 - 1753
Publisher: IEEE
 
» A Look at Electrical Hazards [Standards]
Abstract:
Electricity is a valuable asset for society. It can be naturally generated by the differences in temperatures or wind action on clouds, by the movement of air over conductive wires, by sliding a conductive body across an isolated/nonconductive surface, and displays its presence by static or lightning discharges. It can also be generated by man-made electromechanical machinery driven by water or air flow, photosynthesis devices, or fuel cells, and its presence is displayed by providing light for security in the dark, heat for comfort in the cold, or movement for people to work or facilitate production in the workplace.
Autors: Mcclung, B.;
Appeared in: IEEE Industry Applications Magazine
Publication date: Aug 2011, volume: 17, issue:4, pages: 76 - 77
Publisher: IEEE
 
» A Low-Cost Flexure-Based Handheld Mechanism for Micromanipulation
Abstract:
With the advancement in the knowledge of surgical procedures and cell micromanipulation, there is a demand for a handheld instrument to perform micromanipulation. Hence, this paper presents a 3-DOF handheld mechanism for micromanipulation driven by three piezoelectric actuators. Flexure-based joints are utilized because of its advantages like the nonexistence of backlash and assembly errors. However, it is difficult and expensive to make such compact mechanism using traditional machining methods. In addition, the traditional machining methods are limited to simple design. To reduce the cost of fabrication and also to allow more complex designs, Objet (a rapid prototyping machine) is proposed to be used to build the mechanism. With regards to the handheld applications, the size of the mechanism is a constraint. Hence, a parallel manipulator design is the preferred choice because of its rigidity and compactness. For the illustration of an application, the mechanism is designed with an intraocular needle attached to it. Possible applications of this design include enhancement of performance in microsurgery and cell micromanipulation. Experiments are also conducted to evaluate the manipulator's tracking performance of the needle tip at a frequency of 10 Hz.
Autors: U-Xuan Tan;Win Tun Latt;Cheng Yap Shee;Wei Tech Ang;
Appeared in: IEEE/ASME Transactions on Mechatronics
Publication date: Aug 2011, volume: 16, issue:4, pages: 773 - 778
Publisher: IEEE
 
» A Low-Latency Modular Switch for CMP Systems
Abstract:
As technology advances, the number of cores in Chip MultiProcessor systems and MultiProcessor Systems-on-Chips keeps increasing. The network must provide sustained throughput and ultra-low latencies.In this paper we propose new pipelined switch designs focused in reducing the switch latency. We identify the switch components that limit the switch frequency: the arbiter. Then, we simplify the arbiter logic by using multiple smaller arbiters, but increasing greatly the switch area. To solve this problem, a second design is presented where the routing traversal and arbitrations tasks are mixed. Results demonstrate a switch latency reduction ranging from 10 to 21%. Network latency is...
Autors: Antoni, Roca , José, Flich , Federico, Silla , José, Duato
Appeared in: Microprocessors and Microsystems
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A MEMS-based pneumatic micro-conveyor for planar micromanipulation
Abstract:
This paper present a two dimensional pneumatic actuator based on silicon MEMS technology for objects micro-manipulation using tilted air jets. The device is composed of three layers stacked together, two micro-machined silicon wafers and a Pyrex glass wafer. The system is composed of a set of micro-conveyors in about 9mm×9mm area. Each micro-conveyor has four nozzles and can generate tilted air-jets which allow four conveyance directions. An experiment of the conveyance of a silicon chip of 3mm diameter and weighing approximately 2mg was performed with pulsed air flow.
Autors: Réda, Yahiaoui , Rabah, Zeggari , Julien, Malapert , Jean-François, Manceau
Appeared in: Mechatronics
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Microfluidic Capacitance Sensor for Fluid Discrimination and Characterization
Abstract:
A microfluidic device with embedded capacitive sensing is proposed. The purpose of the device is fluid discrimination and characterization in a microchannel on the basis of the dielectric permittivity. The device is fabricated in a hybrid cost-effective technology which innovatively combines PDMS (PolyDiMethylSiloxane) soft photolithography and screen printing techniques. A microchannel, realized in a PDMS layer, is placed in the field of a sensing capacitor formed by electrodes screen-printed on a glass substrate. Fluids inside the microchannel affect the capacitance, that is in the order of femtofarads, which is measured by a tailored electronic interface system. The electronic system features...
Autors: M., Demori , V., Ferrari , P., Poesio , D., Strazza
Appeared in: Sensors and Actuators A: Physical
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A miniature generator using piezoelectric bender with elastic base
Abstract:
Nowadays green energy devices such as vibration generators attempt to harvest energy from environment. A lot of studies dealing with vibration generators put emphasis on mechanism designs or power generation methods, but few on lowering the resonant frequency of power generation systems. This study proposes that elastic bases attached to vibration generators can lower natural frequencies, so as to make natural frequencies closer to ambient vibration frequency. Therefore, this study investigates miniature electric generators consisting of piezoelectric benders and elastic bases. To install the elastic base, this work uses a spring with prescribed stiffness and a board with given mass...
Autors: W., Li , T.S., Liu , C.C., Hsiao
Appeared in: Mechatronics
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A model for length of saturation velocity region in double-gate Graphene nanoribbon transistors
Abstract:
 Highlights: ? Analytical model for surface potential of DG GNR transistors are presented. ? Analytical model for lateral electric field of DG GNR transistors are presented. ? Analytical model for length of velocity saturation region is proposed. ? The behaviour of the DG GNR transistor is studied in drain region.

Autors: Length of saturation region (LVSR) as an important parameter in nanoscale devices, which controls the drain breakdown voltage is in our focus. This paper presents three models for surface potential, surface electric field and LVSR in double-gate Grap
Appeared in: Microelectronics Reliability
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Motive to Protect [Memoirs]
Abstract:
When I began working on an electric arc test method in late 1994, DuPont had a job they needed me to do, so I just started working on it. I was not thinking about why I should work on this project. I was assigned a job, and I was receiving a paycheck, and, of course, I tried to do the best I could. It certainly didn't hurt that I was a borderline pyromaniac and tended to love working on tests when fire was involved.
Autors: Neal, T.E.;
Appeared in: IEEE Industry Applications Magazine
Publication date: Aug 2011, volume: 17, issue:4, pages: 80 - 80
Publisher: IEEE
 
» A multi-energy-level lattice Boltzmann model for Maxwell's equations without sources
Abstract:
 Highlights: ? We model the Maxwell's equations without sources. ? We use multi- nergy-level and multi- scale techniques. ? Separate sets of distribution functions methods are used. ? We simulate electric and magnetic fields around dipoles.

Autors: A lattice Boltzmann model for the Maxwell's equations without sources is proposed by taking separate sets of distribution functions for the electric and magnetic fields and using the higher-order moment method. The higher-order moment method is based
Appeared in: Journal of Electrostatics
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A multi-regulator sliding mode control strategy for output-constrained systems?
Abstract:
This paper proposes a multi-regulator control scheme for single-input systems, where the setpoint of a regulated output must be changed under the constraint that a set of minimum-phase outputs remain within prescribed bounds. The strategy is based on a max-min selector system frequently used in the aerospace field. The regulators used for the regulated and limited outputs are of the sliding mode type, where the sliding variable is defined as the difference between an output and its allowable limit. The paper establishes overall asymptotic stability, as well as invariance properties leading to limit protection. The design methodology is illustrated with...
Autors: Hanz, Richter
Appeared in: Automatica
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Multiple-State Micro-Mechanical Programmable Memory
Abstract:
image

Autors: This paper reports a multiple-state micro-mechanical memory. The tip displacements of a 350 ?m long VO2-coated micro-mechanical silicon cantilever were programmed to absolute displacements ranging from -19 to -7 m. Ten non-uniform mechanical states w
Appeared in: Microelectronic Engineering
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A New Diskless Checkpointing Approach for Multiple Processor Failures
Abstract:
Diskless checkpointing is an important technique for performing fault tolerance in distributed or parallel computing systems. This study proposes a new approach to enhance neighbor-based diskless checkpointing to tolerate multiple failures using simple checkpointing and failure recovery operations, without relying on dedicated checkpoint processors. In this scheme, each processor saves its checkpoints in a set of peer processors, called checkpoint storage nodes. In return, each processor uses simple XOR operations to store a collection of checkpoints for the processors for which it is a checkpoint storage node. This study defines the concept of safe recovery criterion, which specifies the requirement for ensuring that any failed processor can be recovered in a single step using the checkpoint data stored at one of the surviving processors, as long as no more than a given number of failures occur. This study further identifies the necessary and sufficient conditions for satisfying the safe recovery criterion and presents a method for designing checkpoint storage node sets that meet these requirements. The proposed scheme allows failure recovery to be performed in a distributed manner using XOR operations.
Autors: Ge-Ming Chiu;Jane-Ferng Chiu;
Appeared in: IEEE Transactions on Dependable and Secure Computing
Publication date: Aug 2011, volume: 8, issue:4, pages: 481 - 493
Publisher: IEEE
 
» A new non-symmetry and anti-packing model and its application to image contrast enhancement?
Abstract:
image

Autors:

Graphical abstract

 Graphical abstracts:  Highlights: ?We proposed a novel non-symmetry and anti-packing image representation model (NAM) and its encoding algorithm. ? The NAM image representation can significantly reduce the image storage re
Appeared in: Computers & Electrical Engineering
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A new seam-tracking algorithm through characteristic-point detection for a portable welding robot
Abstract:
 Research highlights: ? A new seam-tracking method has been proposed using the characteristic technique. ? Proposed algorithm has been developed for very irregular profiles and uneven bead surfaces. ? Welding target is narrowed down to the straight-line butt welding task of a V-shaped groove with a non-zero gap.

Autors: The welding task in double-hulled structures in shipyards and in steel-frame structures is hazardous and difficult due to the toxic gas and limited workspace. Therefore, many efforts have been undertaken for automation. The main challenge for automat
Appeared in: Robotics and Computer-Integrated Manufacturing
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A novel approach to motion segmentation based on gamma distribution
Abstract:
We provide a new motion segmentation method in image sequences based on gamma distribution. Motion segmentation is very important because it can be employed for video surveillance, object tracking, and action recognition. The Gaussian mixture model (GMM) has been widely used as a distribution model for motion segmentation. However, we found that the gamma distribution model is more suitable than the GMM for the optical flow based motion segmentation. Experimental results show that the proposed method is very effective in producing accurate motion segmentation results in image sequences.
Autors: Cheolkon, Jung , L.C., Jiao , Maoguo, Gong
Appeared in: AEU - International Journal of Electronics and Communications
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Novel Contour Error Estimation for Position Loop-Based Cross-Coupled Control
Abstract:
Reduction of contour error is the main control objective in contour-following applications. A common approach to this objective is to design a controller based on the contour error directly. In this case, the contour error estimation is a key factor in the contour-following operation. Contour error can be approximated by the linear distance from the actual position to the tangent line or plane at the desired position. This approach suffers from a significant error due to linear approximation. A novel approach to contour error calculation of an arbitrary smooth path is proposed in this paper. The proposed method is based on coordinate transformation and circular approximation. In this method, the contour error is represented by the coordinate of the actual position with respect to a specific virtual coordinate frame. The method is incorporated in a position loop-based cross-coupled control structure. An equivalent robust control system is used to establish stability of the closed-loop system. Experimental results demonstrate the efficiency and performance of the proposed contour error estimation algorithm and the motion control strategy.
Autors: Jiangzhao Yang;Zexiang Li;
Appeared in: IEEE/ASME Transactions on Mechatronics
Publication date: Aug 2011, volume: 16, issue:4, pages: 643 - 655
Publisher: IEEE
 
» A novel design method for electromagnetic bandgap based waveguide filters with periodic dielectric loading
Abstract:
An extremely rapid, versatile prototyping methodology is developed for waveguide filters with periodic dielectric loading which enables direct dimensional synthesis of the unit cell starting from given design objectives. A prototype filter has been designed using a low dielectric constant material and built for the purposes of testing the feasibility of the proposed approach. Our numerical results are compared with an independent commercial software package and also with experimental measurements. Simulation results are also presented for a filter loaded high dielectric constant material. In both cases the results are in excellent agreement with the theory and demonstrate the validity and...
Autors: Serkan, ?im?ek , Ercan, Topuz , Edip, Niver
Appeared in: AEU - International Journal of Electronics and Communications
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A novel humid electronic nose combined with an electronic tongue for assessing deterioration of wine
Abstract:
We report herein the use of a combined system for the analysis of the spoilage of wine when in contact with air. The system consists of a potentiometric electronic tongue and a humid electronic nose. The potentiometric electronic tongue was built with thick-film serigraphic techniques using commercially available resistances and conductors for hybrid electronic circuits; i.e. Ag, Au, Cu, Ru, AgCl, and C. The humid electronic nose was designed in order to detect vapours that emanate from the wine and are apprehended by a moist environment. The humid nose was constructed using a piece of thin cloth sewn, damped with...
Autors: Luis, Gil-Sánchez , Juan, Soto , Ramón, Martínez-Máñez , Eduardo, Garcia-Breijo , Javier, Ibáñez , ...
Appeared in: Sensors and Actuators A: Physical
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A novel system for robust lane detection and tracking
Abstract:
 Highlights: ? We propose a novel lane feature extraction approach with global shape information. ? We compare the proposed feature extraction approach with other existing methods. ? We show improved lane detection and tracking results. ? We studied the performance of SIR, GPF and GSPF for lane tracking. ? We employ new measurement function and parameter selection process for tracking

Autors: This paper presents a lane detection and tracking system based on a novel lane feature extraction approach and the Gaussian Sum Particle filter (GSPF). The proposed feature extraction approach is based on the fact that by zooming into the vanishing p
Appeared in: Signal Processing
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Novel Trench-Gate Floating Islands Power MOSFET (TG-FLIMOSFET):Two-Dimensional Simulation Study
Abstract:
image

Autors: Novel Trench gate floating islands MOSFET (TG-FLIMOSFET) designed using the concept of "Opposite Doped Buried Regions (ODBR) and floating islands (FLI) along with trench-gate technology is proposed and verified using two-dimensional simulations. The
Appeared in: Microelectronic Engineering
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A partial-SOI LDMOSFET with triangular buried-oxide for breakdown voltage improvement
Abstract:
In this paper, a near-triangular buried-oxide partial silicon-on-insulator (TB-PSOI) lateral double-diffused MOS field-effect transistor is proposed. The electric field and electrostatic potential in this structure are modified by the gradual buried-oxide thickness increase. The modification includes the addition of a new peak in the electric field in comparison to that of the conventional PSOI. To assess the efficiency of the proposed structure, its breakdown voltage is compared with that of conventional PSOI using two-dimensional simulations. A comparative study is performed in terms of silicon-film and buried-oxide layer thicknesses, drift region and buried-oxide layer lengths, and drift region doping concentrations. The...
Autors: Mehdi, Saremi , Behzad, Ebrahimi , Ali, Afzali-Kusha , Saeed, Mohammadi
Appeared in: Microelectronics Reliability
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Physics-Based Analysis of Image Appearance Models
Abstract:
Linear and multilinear models (PCA, 3DMM, AAM/ASM, and multilinear tensors) of object shape/appearance have been very popular in computer vision. In this paper, we analyze the applicability of these heuristic models from the fundamental physical laws of object motion and image formation. We prove that under suitable conditions, the image appearance space can be closely approximated to be multilinear, with the illumination and texture subspaces being trilinearly combined with the direct sum of the motion and deformation subspaces. This result provides a physics-based understanding of many of the successes and limitations of the linear and multilinear approaches existing in the computer vision literature, and also identifies some of the conditions under which they are valid. It provides an analytical representation of the image space in terms of different physical factors that affect the image formation process. Numerical analysis of the accuracy of the physics-based models is performed, and tracking results on real data are presented.
Autors: Xu, Yilei;Roy-Chowdhury, Amit K.;
Appeared in: IEEE Transactions on Pattern Analysis and Machine Intelligence
Publication date: Aug 2011, volume: 33, issue:8, pages: 1681 - 1688
Publisher: IEEE
 
» A physics-based, small-signal model for graphene field effect transistors
Abstract:
 Highlights: ? Small-signal model development for graphene FETs. ? Based on quasi-static admittance parameters derived from theoretical operation of the device. ? Unique properties of graphene result in unconventional behavior of elements (gm,CG,gd,CGD). ? Intrinsic and extrinsic frequency performance: high gd limits the operation of the device. ? Effect of varied gate length (L); RG, RS, RD; and ?n, ?p examined.

Autors: In this letter, a small-signal model for the graphene-based field effect transistor based on a physical description of the device's operation is presented. The small-signal model contains circuit elements similar to classical small-signal models for
Appeared in: Solid-State Electronics
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A PLC-based modified-fuzzy controller for PWM-driven induction motor drive with constant V/Hz ratio control
Abstract:
 Highlights: ? We promote the development of PLC-based PWM-driven VVVF speed drive controller. ? We illustrate a scheme for implementing a hybrid fuzzy-PID controller on a PLC. ? We model the PLC-based VVVF drive system in MATLAB/Simulink via system ID. ? The hybrid fuzzy-PID control of VSD implementing constant V/Hz ratio is addressed. ? We reveal the PWM constant V/Hz ratio control via the experiment at low speed.

Autors: In this paper, a method to develop and design a fuzzy-hybrid control on an industrial controller to control speed of an induction motor and implementing a constant V/Hz ratio control is presented. Detailed discussions on the controller for a PWM-driv
Appeared in: Robotics and Computer-Integrated Manufacturing
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A real-time strategy for dexterous manipulation: Fingertips motion planning, force sensing and grasp stability
Abstract:
 Highlights: ? Grasping and manipulation with dextrous hands. ? Humanoid Robotics. ? Mechanisms theory. ? Mechatronics design.

Autors: This paper presents a global strategy for object manipulation with the fingertips with an anthropomorphic dexterous hand: The LMS Hand of the ROBIOSS team from PPRIME Institute in Poitiers (France). Fine manipulation with the fingertips requires to c
Appeared in: Robotics and Autonomous Systems
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Relevant Distance Criterion for Interpolation of Head-Related Transfer Functions
Abstract:
In binaural synthesis, in order to realize more precise and accurate spatial sound, it would be desirable to measure a large number of the head-related transfer functions (HRTFs) in various directions. To reduce the size of the HRTFs, interpolation is often employed, where the HRTF for any direction can be obtained by a limited number of the representative HRTFs. In this paper, it is determined which distortion measure for interpolation of the HRTFs in the horizontal plane is most suitable for predicting audible differences in sound location. Four kinds of HRTF sets, measured using three human heads and one mannequin (KEMAR), were prepared for this study. Using various objective distortion criteria, the differences between interpolated and measured HRTFs were computed. These were then related to the results from the listening tests through receiver operator characteristic (ROC) curves. The results of the present study indicated that for the HRTF sets measured from three human heads, the best predictor of performance was obtained using the distortion measurement computed from the mel-cepstral coefficients, whereas the distortion measurement associated with interaural time delay predicted audible differences in sound location reasonably well for the KEMAR HRTF set. A feasibility test was conducted to verify the usefulness of the selected distortion measurement.
Autors: Ki-Seung Lee;Seok-Pil Lee;
Appeared in: IEEE Transactions on Audio, Speech, and Language Processing
Publication date: Aug 2011, volume: 19, issue:6, pages: 1780 - 1790
Publisher: IEEE
 
» A Reliable & Power Efficient Flow-Control Method to Eliminate Crosstalk Faults in Network-on-Chips
Abstract:
This paper proposes a power-efficient flow-control method to tackle the problem of crosstalk faults in Network-on-Chips (NoCs). The method, called FRR (Flit Reordering/Rotation), combines three coding mechanisms to entirely eliminate opposite direction transitions (OD transitions) as the source of crosstalk faults in NoC communication channels. The first mechanism, called flit-reordering, reorders flits of every packet to find a flit sequence which produces the lowest number of OD transitions on NoC channels. The second mechanism called flit-rotation, logically rotates the content of every flit of the packet with respect to previously sent flit to achieve even more reduction in the number...
Autors: Ahmad, Patooghy , Seyed Ghassem, Miremadi , Hamed, Tabkhi
Appeared in: Microprocessors and Microsystems
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A reliable technology concept for active power cycling to extreme temperatures
Abstract:
We demonstrate that by novel technology concepts, silicon devices can handle electrical power pulses millions of times without failure, although peak temperatures in the silicon reach 350°C during every cycle. This was made possible by a robust trench power MOSFET, and by a very reliable copper-based power-metallization and interconnect concept. Extended experimental investigations, thermal simulations and physical analysis document degradation mechanisms, and show the benefits in comparison to conventional systems.
Autors: M., Nelhiebel , R., Illing , C., Schreiber , S., Wöhlert , S., Lanzerstorfer , ...
Appeared in: Microelectronics Reliability
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A simplified procedure for the analysis of Safety Instrumented Systems in the process industry application
Abstract:
International Standards and Guidelines propose qualitative and quantitative methodologies for the safety assessment of the Safety Instrumented System (SIS). However, some of these methodologies are often complex and not very easy to apply. In fact, some criticalities are found by technicians voted to the functional safety such as the study of SIS for complex architectures, calculation of safety parameters, difficulties in the identification of the SIS subsystem during the design review to guarantee the safety requirements, and so on.The aim of this paper is to propose a simplified and more efficient methodology for safety assessment of electromechanical SIS in compliance...
Autors: M., Catelani , L., Ciani , V., Luongo
Appeared in: Microelectronics Reliability
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Single-Magnet Nonlinear Piezoelectric Converter for Enhanced Energy Harvesting from Random Vibrations?
Abstract:
Power harvesters from mechanical vibrations are commonly linear mechanical resonators that are most effective when excited at resonance. Differently, under wideband vibrations, linear converters are suboptimal. A nonlinear converter is here proposed that implements nonlinearity and bistability by employing a single external magnet, in order to improve conversion effectiveness while simplifying device fabrication. The converter is composed of a piezoelectric bimorph on a ferromagnetic cantilever. The fabrication technology is based on the screen printing of a PZT low-curing-temperature paste on harmonic steel substrate. The ferromagnetic cantilever converter, under proper coupling with the external magnet, bounces between two stable states when...
Autors: M., Ferrari , M., Baù , M., Guizzetti , V., Ferrari
Appeared in: Sensors and Actuators A: Physical
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Spectral Approach to Protein Structure Alignment
Abstract:
A new intrinsic geometry based on a spectral analysis is used to motivate methods for aligning protein folds. The geometry is induced by the fact that a distance matrix can be scaled so that its eigenvalues are positive. We provide a mathematically rigorous development of the intrinsic geometry underlying our spectral approach and use it to motivate two alignment algorithms. The first uses eigenvalues alone and dynamic programming to quickly compute a fold alignment. Family identification results are reported for the Skolnick40 and Proteus300 data sets. The second algorithm extends our spectral method by iterating between our intrinsic geometry and the 3D geometry of a fold to make high-quality alignments. Results and comparisons are reported for several difficult fold alignments. The second algorithm's ability to correctly identify fold families in the Skolnick40 and Proteus300 data sets is also established.
Autors: Shibberu, Y.;Holder, A.;
Appeared in: IEEE/ACM Transactions on Computational Biology and Bioinformatics
Publication date: Aug 2011, volume: 8, issue:4, pages: 867 - 875
Publisher: IEEE
 
» A Sub-Circuit Model of A Microbolometer IR Detector and Its Experimental Validation
Abstract:
In this paper, we present a generic circuit model of microbolometer Infrared detector that can be used to simulate the electrical and thermal performance of microbolometers using SPICE like circuit simulator. Using this model, we have studied the effects of various parameters on the microbolometer performance by simulations in PSPICE for its verification. We have validated the model with the performance of our Titanium microbolometers being developed at our laboratory. We have tuned the model parameters for these microbolometers and have shown that the simulated performance agrees with the measured performance reasonably well with the variety of measurement condition. The...
Autors: Raghvendra Sahai, Saxena , Arun, Panwar , Sukhvinder Singh, Lamba , R.K., Bhan
Appeared in: Sensors and Actuators A: Physical
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Survey on Methods for Modeling and Analyzing Integrated Biological Networks
Abstract:
Understanding how cellular systems build up integrated responses to their dynamically changing environment is one of the open questions in Systems Biology. Despite their intertwinement, signaling networks, gene regulation and metabolism have been frequently modeled independently in the context of well-defined subsystems. For this purpose, several mathematical formalisms have been developed according to the features of each particular network under study. Nonetheless, a deeper understanding of cellular behavior requires the integration of these various systems into a model capable of capturing how they operate as an ensemble. With the recent advances in the "omics” technologies, more data is becoming available and, thus, recent efforts have been driven toward this integrated modeling approach. We herein review and discuss methodological frameworks currently available for modeling and analyzing integrated biological networks, in particular metabolic, gene regulatory and signaling networks. These include network-based methods and Chemical Organization Theory, Flux-Balance Analysis and its extensions, logical discrete modeling, Petri Nets, traditional kinetic modeling, Hybrid Systems and stochastic models. Comparisons are also established regarding data requirements, scalability with network size and computational burden. The methods are illustrated with successful case studies in large-scale genome models and in particular subsystems of various organisms.
Autors: Tenazinha, N.;Vinga, S.;
Appeared in: IEEE/ACM Transactions on Computational Biology and Bioinformatics
Publication date: Aug 2011, volume: 8, issue:4, pages: 943 - 958
Publisher: IEEE
 
» A synthesizable pseudo fractional-N clock generator with improved duty cycle output
Abstract:
 Highlights: ? Synthesizable pseudo fractional-N clock generator: generated by design flowchart. ? Wide output frequency range: the output frequency range is from 12.5MHz to 1GHz. ? 50% duty cycle output: achieved by the synthesizable pulse generator circuit. ? Low sensitivity to PVT: digital circuits are used to reduce sensitivity.

Autors: A proposed synthesizable pseudo fractional-N clock generator with improved duty cycle output is presented by the pseudo fractional-N frequency synthesizer unit for SoC chips and the dynamic frequency scaling applications. The different clock frequenc
Appeared in: Microelectronics Journal
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Thermal Sensor for Water Using Self-Heated NTC Thick-Film Segmented Thermistors
Abstract:
A simple thermal (heat loss) sensor system was designed in a small plastic tube housing using a negative thermal coefficient (NTC) thick-film thermistor as a self-heating sensor. The voltage power supply [range constant voltage (RCV)-range constant voltage] uses the measured input water temperature to select the applied voltage in steps (up and down) in order to enable operation of the sensor at optimal sensitivity for different water temperatures. The input water temperature was measured using a “cold” NTC thick-film segmented thermistor. The measured calibration curves were modeled. Additional calculated curves were interpolated between the experimental curves in fine steps to cover each temperature of input water and can be used for determining the water volume flow rate or water velocity. The realized prototype flow meter inertia, stability, repeatability, and tolerance were measured and analyzed. The proposed intelligent RCV thermal flow meter system will include a smart power supply with range-constant-voltages (auto-range), a simple acquisition card and custom designed flow meter software.
Autors: Nikolic, M.V.;Radojcic, B.M.;Aleksic, O.S.;Lukovic, M.D.;Nikolic, P.M.;
Appeared in: IEEE Sensors Journal
Publication date: Aug 2011, volume: 11, issue:8, pages: 1640 - 1645
Publisher: IEEE
 
» A time-domain physics-of-failure model for the lifetime prediction of wire bond interconnects
Abstract:
A new physics-of-failure lifetime prediction model for wire bonds is proposed. It discards the usual cycle-dependent modeling methodology and is instead based on a time domain representation. The bonding interface damage condition is estimated at regular time intervals through a damage model which includes the effect of temperature and time dependent material properties. Thus the impact of time at temperature and other rate sensitive processes on the bond degradation rate can be accurately represented. In addition, the model accounts not only for the damage accumulation processes but also the damage removal phenomena during thermal exposure.
Autors: L., Yang , P.A., Agyakwa , C.M., Johnson
Appeared in: Microelectronics Reliability
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» A Whisper of Evidence in Global Software Engineering
Abstract:
A systematic review of global software engineering (GSE) literature from 2000 to 2007 shows the field to be immature. Studies report many challenges but little evidence regarding specific GSE practices directly related to project success or failure. There is evidence that distance matters and, furthermore, that GSE--although driven by cost-reduction goals--seldom brings immediate cost savings.
Autors: Èmite, Darja;Wohlin, Claes;
Appeared in: IEEE Software
Publication date: Aug 2011, volume: 28, issue:4, pages: 15 - 18
Publisher: IEEE
 
» A Wireless And Passive Wafer Cleanliness Monitoring Unit Via Electromagnetic Coupling For Semicondutcor/Mems Manufacturing Facilities
Abstract:
This paper presents a wireless and passive chemical sensing system, in-situ real time, via electromagnetic (EM) coupling, capable of monitoring wafer cleanliness during rinsing process at semiconductor/MEMS manufacturing facilities. A MEMS chemical sensor is embedded in a wafer-form transponder to evaluate the rinsing process in-situ by measuring the conductivity of rinsing water inside micro-features formed by two interdigitated electrodes. All necessary power for the transponder is supplied from an external interrogator via the on-wafer transponder antenna. The modulated conductivity data is then emitted back from the transponder to the external interrogator in wireless and battery-free manner. The wireless system has...
Autors: Xu, Zhang , Junseok, Chae
Appeared in: Sensors and Actuators A: Physical
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Above 20% external quantum efficiency in green and white phosphorescent organic light-emitting diodes using an electron transport type green host material
Abstract:
image

Autors:

Graphical abstract

 Graphical abstract:  Highlights: ? External quantum efficiency of 25% in green phosphorescent device. ? External quantum efficiency over 20% in three color white device. ? High efficiency spirobifluorene type green host ma
Appeared in: Organic Electronics
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Accurate Reconstruction for DNA Sequencing by Hybridization Based on a Constructive Heuristic
Abstract:
Sequencing by hybridization is a promising cost-effective technology for high-throughput DNA sequencing via microarray chips. However, due to the effects of spectrum errors rooted in experimental conditions, an accurate and fast reconstruction of original sequences has become a challenging problem. In the last decade, a variety of analyses and designs have been tried to overcome this problem, where different strategies have different trade-offs in speed and accuracy. Motivated by the idea that the errors could be identified by analyzing the interrelation of spectrum elements, this paper presents a constructive heuristic algorithm, featuring an accurate reconstruction guided by a set of well-defined criteria and rules. Instead of directly reconstructing the original sequence, the new algorithm first builds several accurate short fragments, which are then carefully assembled into a whole sequence. The experiments on benchmark instance sets demonstrate that the proposed method can reconstruct long DNA sequences with higher accuracy than current approaches in the literature.
Autors: Yang Chen;Jinglu Hu;
Appeared in: IEEE/ACM Transactions on Computational Biology and Bioinformatics
Publication date: Aug 2011, volume: 8, issue:4, pages: 1134 - 1140
Publisher: IEEE
 
» Acoustically Generated Flows in Microchannel Flexural Plate Wave Sensors: Effects of Compressibility
Abstract:
Acoustically generated flowfields in flexural plate wave sensors filled with a Newtonian liquid (water) are considered. A computational model based on compressible flow is developed for the sensor with a moving wall for pumping and mixing applications in microchannels. For the compressible flow formulation, an isothermal equation of state for water is employed. The velocity and pressure profiles for different parameters including flexural wall frequency, channel height, amplitude of the wave and wave length are investigated for four microchannel height/length geometries. It is found that the flowfield becomes pseudo-steady after sufficient number of flexural cycles. Both instantaneous and time averaged...
Autors: Ersin, Sayar , Bakhtier, Farouk
Appeared in: Sensors and Actuators A: Physical
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Active learning of visual descriptors for grasping using non-parametric smoothed beta distributions
Abstract:
 Highlights: ? A constrained regression algorithm based on Beta-Binomial conjugate model. ? Prediction of the success of a grasp for a grasping point described by a set of features. ? Full posterior prediction of the probability of successful grasp. ? Active strategies based on the full posterior to efficiently explore the object. ? Experimental results with a real robot using features extracted from a single image.

Autors: One of the basic skills for a robot autonomous grasping is to select the appropriate grasping point for an object. Several recent works have shown that it is possible to learn grasping points from different types of features extracted from a single i
Appeared in: Robotics and Autonomous Systems
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Adaptive data-driven error detection in swarm robotics with statistical classifiers
Abstract:
 Highlights: ? A self-detection approach for an adaptive error detection in a distributed manner. ? Statistical classifier is suitable for error detection in swarm robotics. ? Practical application of Receptor Density Algorithm (RDA) in swarm robotics. ? Two communication strategies to reduce communication overhead in the context of proposed implementation.

Autors: Swarm robotics is an example of a complex system with interactions among distributed autonomous robots as well with the environment. Within the swarm there is no centralised control, behaviour emerges from interactions between agents within the swarm
Appeared in: Robotics and Autonomous Systems
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Advanced modelling of bird strike on high lift devices using hybrid Eulerian-Lagrangian formulation
Abstract:
The work presented in this paper deals with application of explicit finite element analyses in order to predict bird strike induced impact damage on high lift devices of typical large transport aircraft. The hybrid Eulerian Lagrangian finite element formulation has been applied as to efficiently model the impact of a highly deformable object on an inboard flap structural model. As structural elements of aeronautical structures are commonly assembled from structural items manufactured from a variety of materials, a damage prediction methodology on aeronautical structures has to be able to model damage in metallic materials as well as in composite and...
Autors: I., Smojver , D., Ivan?evi?
Appeared in: Aerospace Science and Technology
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Advances in multirate filter bank structures and multiscale representations
Abstract:
Thierry, Blu , Laurent, Duval , Truong Q., Nguyen , Jean-Christophe, Pesquet
Autors: Source: Signal Processing, Volume 91, Issue 12, December 2011, Pages 2697-2698
Appeared in: Signal Processing
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Advancing Software Engineering Professional Education
Abstract:
The importance and complexity of software systems require software engineers who possess the appropriate skills, knowledge, and experience to develop, maintain, and acquire such systems. Graduate education is key in advancing professional software engineering. The "Graduate Software Engineering 2009 (GSwE2009): Curriculum Guidelines for Graduate Degree Programs in Software Engineering" is a new reference curriculum for master's programs. It features the GSwE2009 guiding principles, preparatory knowledge, student outcomes, curriculum architecture, and a core body of knowledge.
Autors: Ardis, Mark;Bourque, Pierre;Hilburn, Thomas;Lasfer, Kahina;Lucero, Scott;McDonald, James;Pyster, Art;Shaw, Mary;
Appeared in: IEEE Software
Publication date: Aug 2011, volume: 28, issue:4, pages: 58 - 63
Publisher: IEEE
 
» Aerodynamic and aerothermodynamic design of Future Launchers Preparatory Program concepts
Abstract:
In the frame of the Future Launchers Preparatory Program, being developed by the European Space Agency, several Reusable Launch Vehicle concepts are under investigation. In this paper the current design activities at phase-A level, carried out by Centro Italiano Ricerche Aerospaziali, are described. The goal has been to define the preliminary hypersonic aerodynamic and aerothermodynamic data-bases of each vehicle for concept competition. To this end, different design approaches have been addressed as engineering methods and computational fluid dynamics. The reentry scenario with the corresponding loading environment for each launcher concept is reported and analyzed. The final results, applicable for the...
Autors: Giuseppe, Pezzella
Appeared in: Aerospace Science and Technology
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Agile Collaborative Research: Action Principles for Industry-Academia Collaboration
Abstract:
Both the software industry and academia promote collaboration to solve challenges together that neither can solve alone. Collaboration brings opportunities to understand and improve in ways not possible when working apart, but it succeeds only if both parties are contributing. A collaboration model developed from eight years' experience setting up and managing a research center explicitly focused on industry needs is based on five success factors enabling research results (need orientation, industry goal alignment, deployment impact, industry benefit, and innovativeness), five success factors enabling research activities (management engagement, network access, collaborator match, communication ability, and continuity), and 10 action principles for industry-academia collaboration management.
Autors: Sandberg, Anna;Pareto, Lars;Arts, Thomas;
Appeared in: IEEE Software
Publication date: Aug 2011, volume: 28, issue:4, pages: 74 - 83
Publisher: IEEE
 
» Agility Drivers
Abstract:
Our growing ability to swiftly put together sophisticated software affords us the luxury to listen to our customers, to try out new things, to make mistakes, to redesign as we move along—in short to be agile. On the technological front, the main driving forces are powerful operating systems, the widespread availability database management systems, a wide selection of libraries, interoperability standards, versatile programming languages, ample processing power, and sophisticated development tools. On the environment front, agility is driven by specialized education, informal management structures, Web access, open source software, shifting user expectations, and the ubiquitous availability of IT infrastructures. Where agility drivers are present, we must adjust our development processes, demand more from our software suppliers, and develop in-house capacity to organically grow applications and services that will delight and even captivate our users and customers.
Autors: Spinellis, Diomidis;
Appeared in: IEEE Software
Publication date: Aug 2011, volume: 28, issue:4, pages: 96 - 96
Publisher: IEEE
 
» Airborne GMTI experiment based on multi-channel synthetic aperture radar using space time adaptive processing?
Abstract:
The non-ideal conditions of real-world detection environments, such as beam-pattern mismatch, non-ideal sensor geometry, receiver channel imbalance and clutter heterogeneity, can preclude the performance described in much of the theoretical STAP literature. For the purpose of overcoming those problems, a new target detection and location approach with low complexity is proposed. This presented algorithm is performed in three stages, i.e. array manifold adaptive calibration, clutter rejection in Winner filter sense and target parameters estimation using modified single-snapshot multiple direction of arrival estimation method. The array manifold calibration procedure uses a power-based criterion to reject a weak clutter patch and/or target...
Autors: Zhiwei, Yang , Guisheng, Liao , shun, He , cao, Zeng
Appeared in: Aerospace Science and Technology
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» All-optical cross-bar network architecture using TOAD based interferometric switch and designing of reconfigurable logic unit
Abstract:
 Highlights: ? All-optical 2×2 switch using Terahertz Optical Asymmetric Demultiplexer is proposed. ? Numerical simulation confirms feasibility of scheme. ? Cross-bar architecture using this 2×2 switch is designed. ? Also reconfigurable logic unit is designed using cross-bar network architecture. ? This logic unit can perform 16-Boolean logical operations.

Autors: The design of all-optical 2×2 Terahertz Optical Asymmetric Demultiplexer (TOAD) based interferometric switch is proposed and described in this manuscript. Numerical simulation has been done to achieve the performance of the switch. Using this 2×2 TOA
Appeared in: Optical Fiber Technology
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Allocation of optimal discovery slots in IEEE 802.3av networks
Abstract:
 Abstract: In this letter, we consider ONU registration procedure in symmetrical 10Gb/s IEEE 802.3av networks. Through series of computer simulations we state the optimization guidelines that lead to the reduction of message collisions and the increase of link utilization.
Autors: Milan, Bjelica , Ana, Peri?
Appeared in: AEU - International Journal of Electronics and Communications
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» An adaptive approach for the identification of improper complex signals
Abstract:
 Highlights: ? Real-time approach for the identification of second order noncircularity. ? Convex combination of Complex LMS and Augmented Complex LMS. ? Monitoring mixing parameter allows detection & tracking of complex improperness. ? Rigorous analysis of convergence of the mixing parameter. ? Comprehensive simulations on proper/improper synthetic data & real world wind data

Autors: A real-time approach for the identification of second order noncircularity (improperness) of complex valued signals is introduced. This is achieved based on a convex combination of a standard and widely linear complex adaptive filter, trained by the
Appeared in: Signal Processing
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» An adaptive least squares channel estimation based on conjugate gradient approach for multipath fading CDMA systems
Abstract:
image

Autors:

Graphical abstract

 Graphical abstract:  Highlights: ? Problem of mobile channel estimation at high channel efficiently is addressed. ? An efficient method based on conjugate gradient (CG) algorithm is developed for channel estimation. ? Prop
Appeared in: Computers & Electrical Engineering
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» An analysis of the Brown-Biefeld effect
Abstract:
image

Autors:  Highlights: ? The Brown-Biefeld effect is due to ion drift. ? The thrust force is successfully calculated as the force on the space charge. ? The relation between force and current has been established. ? Approximate formula for the force as functio
Appeared in: Journal of Electrostatics
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» An analytical approach for physical modeling of hot-carrier induced degradation
Abstract:
We develop an analytical model for hot-carrier degradation based on a rigorous physics-based TCAD model. The model employs an analytical approximation of the carrier acceleration integral (calculated with our TCAD approach) by a fitting formula. The essential features of hot-carrier degradation such as the interplay between single-and multiple-electron components of Si-H bond dissociation, mobility degradation during interface state build-up, as well as saturation of degradation at long stress times are inherited. As a result, the change of the linear drain current can be represented by the analytical expression over a wide range of stress conditions. The analytical model can be...
Autors: S., Tyaginov , I., Starkov , H., Enichlmair , Ch., Jungemann , J.M., Park , ...
Appeared in: Microelectronics Reliability
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» An analytical compact model for Schottky-barrier double gate MOSFETs
Abstract:
 Highlights: ? We present a compact model for long-channel Schottky barrier double gate MOSFETs. ? Our compact model includes all transport mechanisms that are relevant in the targeted devices: tunneling, thermionic emission and drift-diffusion. ? Our model considers both electron and hole transport. ? Our model agrees very well with 2D TCAD simulations in all operating regimes.

Autors: An analytical and explicit compact model for undoped symmetrical silicon double gate MOSFETs (DGMOSFETs) with Schottky barrier (SB) source and drain is presented. The SB MOSFET can be studied as a traditional MOSFET where the doped source/drain regio
Appeared in: Solid-State Electronics
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» An Analytical Generalized Prandtl–Ishlinskii Model Inversion for Hysteresis Compensation in Micropositioning Control
Abstract:
Smart actuators employed in micropositioning are known to exhibit strong hysteresis nonlinearities, which may be asymmetric and could adversely affect the positioning accuracy. In this paper, the analytical inverse of a generalized Prandtl-Ishlinskii model is formulated to compensate for hysteresis nonlinearities of smart actuators. The generalized model was modified to ensure its continuity, and its validity in characterizing different hysteresis properties is briefly demonstrated by comparing the model responses with the measured data for the magnetostrictive, shape memory alloys (SMA), and piezo micropositioning actuators. Since the proposed generalized model is a mere extension of the analytically invertible classical Prandtl-Ishlinskii model, an inverse of the generalized model is formulated using the inverse of the classical model together with those of the envelope functions of the generalized play operator. The effectiveness of the inverse of the generalized model in compensating for the symmetric and asymmetric saturated hysteresis effects is subsequently investigated through simulations for a magnetostrictive and a SMA actuators, and through preliminary experiments performed on a piezo micropositioning stage. The simulation results suggest that the inverse of the generalized Prandtl-Ishlinskii model can be conveniently applied as a feedforward compensator to effectively mitigate the effects of the asymmetric and saturated hysteresis in magnetostrictive and SMA actuators. The experimental results further revealed that the proposed generalized analytical inverse model can be conveniently implemented as a real-time feedforward compensator to compensate for hysteresis nonlinearities of a piezo micropositioining stage.
Autors: Al Janaideh, M.;Rakheja, S.;Chun-Yi Su;
Appeared in: IEEE/ASME Transactions on Mechatronics
Publication date: Aug 2011, volume: 16, issue:4, pages: 734 - 744
Publisher: IEEE
 
» An array of microliter-sized microbial fuel cells generating 100?W of power
Abstract:
We report an array of three microliter-sized microbial fuel cells (MFCs) connected in series. The three MFCs were integrated into a sandwich of two glass slides, incorporating two chambers of 50?L volumetric capacity that were separated by a cation exchange membrane (CEM). Each anolyte/catholyte chamber was defined by 500?m-thick PTEE (polytetrafluoroethylene) gaskets. The MFCs contained a Geobacter-enriched mixed bacterial culture and ferricyanide, which were independently driven into anolyte/catholyte chambers, respectively. The MFC array produced 100?W total power (33?W/cm2 or 667?W/cm3) and 1.8V output voltage, which are approximately 10 times and 4.5 times higher, respectively, than the maximum values of previously...
Autors: Seokheun, Choi , Junseok, Chae
Appeared in: Sensors and Actuators A: Physical
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» An Auditory-Based Feature Extraction Algorithm for Robust Speaker Identification Under Mismatched Conditions
Abstract:
An auditory-based feature extraction algorithm is presented. We name the new features as cochlear filter cepstral coefficients (CFCCs) which are defined based on a recently developed auditory transform (AT) plus a set of modules to emulate the signal processing functions in the cochlea. The CFCC features are applied to a speaker identification task to address the acoustic mismatch problem between training and testing environments. Usually, the performance of acoustic models trained in clean speech drops significantly when tested in noisy speech. The CFCC features have shown strong robustness in this kind of situation. In our experiments, the CFCC features consistently perform better than the baseline MFCC features under all three mismatched testing conditions-white noise, car noise, and babble noise. For example, in clean conditions, both MFCC and CFCC features perform similarly, over 96%, but when the signal-to-noise ratio (SNR) of the input signal is 6 dB, the accuracy of the MFCC features drops to 41.2%, while the CFCC features still achieve an accuracy of 88.3%. The proposed CFCC features also compare favorably to perceptual linear predictive (PLP) and RASTA-PLP features. The CFCC features consistently perform much better than PLP. Under white noise, the CFCC features are significantly better than RASTA-PLP, while under car and babble noise, the CFCC features provide similar performances to RASTA-PLP.
Autors: Qi Li;Yan Huang;
Appeared in: IEEE Transactions on Audio, Speech, and Language Processing
Publication date: Aug 2011, volume: 19, issue:6, pages: 1791 - 1801
Publisher: IEEE
 
» An autonomous intelligent gateway infrastructure for in-field processing in precision viticulture
Abstract:
? iPAGAT: in-field data processing in PA/PV applications that uses WSN. ? Intelligent sink node which manages sensor data and provide middleware services. ? Gateway with a built-in aggregation engine and a data integration system. ? With several wireless interfaces, the gateway enables site-specific management using smartphones. ? Infrastructure for distributed service-oriented information systems in PA/PV applications.

Autors: Wireless sensor networks have found multiple applications in precision viticulture. Despite the steady progress in sensing devices and wireless technologies, some of the crucial items needed to improve the usability and scalability of the networks, s
Appeared in: Computers and Electronics in Agriculture
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» An Improved Heuristic Algorithm for Finding Motif Signals in DNA Sequences
Abstract:
The planted (l, d)-motif search problem is a mathematical abstraction of the DNA functional site discovery task. In this paper, we propose a heuristic algorithm that can find planted (l, d)-signals in a given set of DNA sequences. Evaluations on simulated data sets demonstrate that the proposed algorithm outperforms current widely used motif finding algorithms. We also report the results of experiments on real biological data sets.
Autors: Chao-Wen Huang;Wun-Shiun Lee;Sun-Yuan Hsieh;
Appeared in: IEEE/ACM Transactions on Computational Biology and Bioinformatics
Publication date: Aug 2011, volume: 8, issue:4, pages: 959 - 975
Publisher: IEEE
 
» An Integrated Triangulation Laser Scanner for Obstacle Detection of Miniature Mobile Robots in Indoor Environment
Abstract:
The miniaturization of an autonomous robot requires the integration of components that not only need to satisfy strict spatial constraints, but also need to demonstrate useful functionalities and performance, while demanding low power. For miniaturized autonomous robots that aim at exploring unknown environments, sensors for navigation and for the understanding of basic geometrical features of the environment are of utmost importance for a robot's survival and mission. This paper presents a miniaturized triangulation laser scanner that was developed and characterized for use on a 10 × 10 × 10 cm3 robot. The optimal configurations of the laser sensor on two sides of the robot are discussed, and measurement formulas as well as theoretical resolution are deduced. For indoor applications, the measurement range of the system runs from approximately 80 mm, with 1 mm resolution, up to 600 mm, with 12 mm resolution. The aim of the work is to demonstrate the possibility of extracting basic information from the robot surroundings by means of small, simple, low-power, and low-cost demanding devices, which, in addition, can be scaled down in order to equip even smaller robots.
Autors: Guoqiang Fu;Corradi, P.;Menciassi, A.;Dario, P.;
Appeared in: IEEE/ASME Transactions on Mechatronics
Publication date: Aug 2011, volume: 16, issue:4, pages: 778 - 783
Publisher: IEEE
 
» An investigation of a tactical cargo aircraft aft body drag reduction based on CFD analysis and wind tunnel tests
Abstract:
Aft body shape of an aft ramp door cargo aircraft normally has potential for increasing drag due to air flow separation and wake generation in comparison to aft body of passenger aircrafts. In this paper, the air flow pattern around the aft body and drag reduction mechanisms have been investigated for a designing the aft body configuration for a cargo aircraft based on existing passenger aircraft aft body. In the current work we intend to maximize drag reduction with aft body refinement, using CFD and wind tunnel tests. In fact, the cross section contour of the body around the ramp...
Autors: Masoud, Mirzaei , Mohammad Hadi, Karimi , Mohammad Ali, Vaziri
Appeared in: Aerospace Science and Technology
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» An optimal open-loop multimode fiber gyroscope for rate-grade performance applications
Abstract:
 Highlights: ? An optimized multimode fiber optic gyroscope is designed. ? A low-cost analog signal processing associated with an open-loop operation is used. ? The coupler technology influences the gyroscope performances. ? The obtained gyroscope is useful for the medium performance applications.

Autors: We report the realization of a new version of a fiber optic gyroscope (FOG), using low-cost multimode fiber components. This is achieved by an optimal choice of the components such as fiber, coupler, light source and photodetector. The aim behind thi
Appeared in: Optical Fiber Technology
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» An overview of 3D object grasp synthesis algorithms
Abstract:
 Highlights: ? We present a survey of computational algorithms for generating 3D object grasps. ? We classify works into two broad approaches: Analytical and empirical methods. ? Analytical approaches use kinematic and dynamic formulations of the problem. ? Empirical grasping approaches are based on classification and learning methods.

Autors: This overview presents computational algorithms for generating 3D object grasps with autonomous multi-fingered robotic hands. Robotic grasping has been an active research subject for decades, and a great deal of effort has been spent on grasp synthes
Appeared in: Robotics and Autonomous Systems
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Analysis of Best Channel Feedback and Its Adaptive Algorithms for Multicarrier Wireless Data Systems
Abstract:
Multiuser diversity techniques are used in multicarrier data systems to enhance downlink cell throughput. This requires downlink channel information from the users that is opportunistically used by a base station to send data to the users with good channel condition. Channel feedback from the user to the base station incurs high overhead especially when many users are in the cell and each user needs to report channel information over multiple channels, as in OFDMA systems. To reduce the quantity of feedback information without significant throughput degradation, a practical strategy is to deliver feedback on a partial set of channels with the best channel quality. We call it best feedback, and this reporting scheme carried out for best four or five among 24 channels has been already adopted in the IEEE 802.16e standard. Considering real feedback conditions, we investigate the performance of a best feedback scheme and derive the optimal number of channels for which information needs to be fed back to keep the throughput gap (compared to a full feedback scheme) within a target margin. From the optimal condition, we propose an adaptive best feedback algorithm, where the number of reported channels is adjusted to adapt to the number of users in the cell. We also propose an adjusted periodic feedback algorithm, where users are divided into groups and scheduling is carried out group by group, so a user can report feedback information when his group is scheduled, thereby reducing the frequency of feedback transmission. To support differentiated performance, we further propose heterogeneous feedback algorithms where users are divided into heterogeneous groups, each with a different group size or a different feedback period. Numerical results validate our analysis and provide meaningful insights into the design of various channel feedback schemes.
Autors: Choi, Young-June;Rangarajan, Sampath;
Appeared in: IEEE Transactions on Mobile Computing
Publication date: Aug 2011, volume: 10, issue:8, pages: 1071 - 1082
Publisher: IEEE
 
» Analysis of critical-length data from Electromigration failure studies
Abstract:
An accurate estimation of the Blech length, the critical line length below which interconnect lines are immortal, is vital as it allows EDA tools to reduce their workload. In lines longer than the Blech length, either a void will inevitably nucleate and grow until the line fails, or the line will rupture. The majority of failure analyses reveal voiding as the failure mechanism however recent analysis suggest Blech length failures are characterised by simultaneous [6] voiding and rupture, and a non-zero steady-state drift velocity. This paper provides an alternative interpretation of results.
Autors: V.M., Dwyer
Appeared in: Microelectronics Reliability
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Analysis of electrostatic discharge suppressors with ultra-low capacitance used for IC protection
Abstract:
 Highlights: ? The TDMM was used to study the electrical characteristics of an ESD suppressor. The obtained capacitance was validated by measurement data. ? The maximum electric fields are much higher than the threshold electric field. ? Maximum ESD currents may cause a malfunction in a high sensitivity IC.

Autors: The TDMM was successfully used to analyze the capacitance, the electric field, and the ESD current of an ESD suppressor. The obtained capacitance was also validated by measurement data. It is found that the maximum electric fields in the air gap betw
Appeared in: Journal of Electrostatics
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Analysis of lightning-caused ferroresonance in Capacitor Voltage Transformer (CVT)
Abstract:
 Highlights: ? A lightning strike can cause ferroresonance in a CVT. ? The most severely affected side of the CVT is the primary side. ? Presently mitigation of ferroresonance is by using spark gap. ? The use of spark gap does not effectively mitigate ferroresonance. ? A new design is proposed for the spark gap to be in parallel with the resistor and in series with the capacitor.

Autors: Power networks contain capacitances and inductances that can saturate, presenting opportunities for ferroresonance to occur. Most power equipment is designed through linear theory but ferromagnetic materials are highly non-linear and when they resona
Appeared in: International Journal of Electrical Power & Energy Systems
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Analysis of the environmental magnetic noise rejection by using two simple magnetoelectric sensors
Abstract:
We have evaluated the performance of a classical differential technique to reject magnetic or, in a lesser extent, the vibrational coherent noise sources sensed by two identical magnetoelectric (ME) laminated sensors with the help of a data logger. The signals of two ME sensors were directly subtracted given highly homogeneous external noise. Through a signal processing technique, the intrinsic noise of the ME sensor systems was obtained to be 20 pT/?Hz with a rejection factor of the external homogeneous noise sources of 20. The latter is mainly limited, as theoretical described, by the incoherent noise and discrepancy between the sensors....
Autors: Y., Shen , J., Gao , L., Shen , D., Gray , J., Li , ...
Appeared in: Sensors and Actuators A: Physical
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Analyzing localization errors in one-dimensional sensor networks
Abstract:
 Highlights: ? We consider distance-based multi-hop localization procedures of one-dimensional sensor networks. ? The fundamental behaviors of localization errors are examined through the Cramer-Rao lower bound (CRLB). ? The localization error for a sensor is locally determined by network elements within a certain range of this sensor. ? The analysis is applicable because the Maximum-likelihood estimator attains the CRLB

Autors: One-dimensional sensor networks can be found in many fields and demand node location information for various applications. Developing localization algorithms in one-dimensional sensor networks is trivial, due to the fact that existing localization al
Appeared in: Signal Processing
Publication date: Aug 2011
Publisher: Elsevier B.V.
 
» Announcement: new Associate Editor
Abstract:
[No author name available]
Autors: Source: Biosystems Engineering, In Press, Corrected Proof, Available online 5 August 2011
Appeared in: Biosystems Engineering
Publication date: Aug 2011
Publisher: Elsevier B.V.
 

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