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High Performance High Dielectric Constant Films Deposited by Dual Spectral Source Rapid Isothermal Assisted Metalorganic Chemical Vapor Deposition (MOCVD)

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MRS Online Proceedings Library (OPL) 2011年第1期470卷 133-133页

作者： Y. Chen R. Singh S. DeBoer R.P.S. Thakur Department of Electrical and Computer Engineering Clemson University Clemson SC 29634 Department of Electrical and Computer Engineering and Material Science and Engineering Program Clemson University Clemson SC 29634 singh@ces.clemson.edu Micron Technology Inc. Boise ID 83706

Dual spectral source assisted MOCVD is an ideal technique for the deposition of high dielectric constant materials as well as other electronic and optical materials. Tungsten halogen lamps and a deuterium lamp are used as the sources of optical and thermal energy. Ta2O5 films were deposited at 200°C for 30 minutes and annealed at 600°C for 30 minutes have shown leakage current densities as low as 10−10 A/ cm2 for gate voltage under 5V. To the best of our knowledge, these are the best results reported to date by other researchers. The high energy photons used in the in-situ cleaning and deposition process play an important role in obtaining high quality films of Ta2O5.

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Designing enhanced classifiers using prior process knowledge: Regularized maximum-likelihood

Designing enhanced classifiers using prior process knowledge...

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2011 IEEE International Workshop on Genomic Signal Processing and Statistics, GENSIPS'11

作者： Esfahani, Mohammad Shahrokh Zollanvari, Amin Yoon, Byung-Jun Dougherty, Edward R. Department of Electrical and Computer Engineering Texas A and M University United States Childrens Hospital Informatics Program at Harvard-MIT Division of Health Sciences and Technology Harvard Medical School Brigham and Womens Hospital United States Phoenix AZ United States

ISBN: (纸本)9781467304900

We propose a novel optimization-based paradigm for designing enhanced classifiers. The proposed paradigm allows us to incorporate available prior process knowledge into classifier design, thereby improving the performance of the resulting classifiers. In this work, we focus on dynamical systems that can be represented as finite-state multi-dimensional stochastic processes that possess labeled steady-state distributions. Given prior operational knowledge of the process, our goal is to build a classifier that can accurately label future observations obtained from the steady-state, by utilizing both the available prior knowledge and the training data. Simulation results show that the proposed paradigm yields improved classifiers that outperform traditional classifiers that use only training data. ©2011 IEEE.

关键词： Random processes

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An Extension to the Contract-Net Protocol Applied to the Transport Planning Problem of Oil Products

An Extension to the Contract-Net Protocol Applied to the Tra...

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Workshop and School of Agent Systems, their Environment and Applications (WESAAC)

作者： Roni F. Banaszewski Kelvin E. Nogueira Jean M. Simão Lucia V. Arruda Cesar A. Tacla Graduate Program in Electrical Engineering and Industrial Computer Science (CPGEI) Federal University of Technology of Paraná (UTFPR) Curitiba Brazil

In supply chains of petroleum industry, maintaining a proper inventory level for multiple petroleum products is a crucial issue. Basically, this chain has several elements like producer bases, consumer bases and terminals that are linked by means of a multi-modal transport network. These elements must cooperate to achieve the global goal of the system with a minimized cost. To achieve this goal, this paper presents a multiagent protocol for simultaneous negotiations based on the Contract-Net and the application of this in the chain aforementioned. As a result, this protocol proved to be very efficient to return a feasible solution in a low processing time.

关键词： Computational modeling Waste materials Protocols Educational institutions Planning Proposals Conferences

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An optical-coding method for scattering signal detection in microfluidic cytometers

An optical-coding method for scattering signal detection in ...

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15th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2011, MicroTAS 2011

作者： Wu, T.-F. Mei, Z. Pion-Tonachini, L. Zhao, C. Qiao, W. Arianpour, A. Lo, Y.-H. Materials Science and Engineering Program University of California at San Diego San Diego CA 92093-0418 United States Department of Electrical and Computer Engineering University of California at San Diego San Diego CA 92093-0407 United States School of Information and Electronics Beijing Institute of Technology Beijing 100081 China

ISBN: (纸本)9781618395955

In this article, we demonstrated an optical-coding method to detect forward scattering and large angle scattering signals within microfluidic devices. Using silicon photodetectors, we can effectively discriminate the mixture of unlabelled beads and obtain the spatial distribution of beads. The optical coding method improves the signal-to-noise and particle differentiation abilities for lab-on-a-chip flow cytometers. Copyright © (2011) by the Chemical and Biological Microsystems Society.

关键词： Microfluidics

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On the ergodic secrecy capacity of the wiretap channel under imperfect main channel estimation

On the ergodic secrecy capacity of the wiretap channel under...

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Asilomar Conference on Signals, Systems & computers

作者： Zouheir Rezki Ashish Khisti Mohamed-Slim Alouini Electrical Engineering Program Physical Science and Engineering Division King Abdullah University for Science and Technology Thuwal Makkah Saudi Arabia Electrical and Computer Engineering Department University of Toronto Toronto ONT Canada

ISBN: (纸本)9781467303217

The ergodic secrecy capacity of the wiretap channel is known when the main channel (between the transmitter and the legitimate receiver) state information (CSI) is perfect at the transmitter and the coherence period is sufficiently large to enable random coding arguments in each block. In a fast fading scenario, when the codeword length spans many coherence periods, the secrecy capacity is still not known. In this paper, we present a framework that characterizes this secrecy capacity under imperfect main channel estimation at the transmitter. Inner and outer bounds on the ergodic secrecy capacity are derived for a class of independent identically distributed (i.i.d.) fading channels. The achievable rate is a simple on-off scheme using a Gaussian input. The upper bound is obtained using an appropriate correlation scheme of the main and the eavesdropper channels. The upper and the lower bounds coincide with recently derived ones in the perfect main CSI extreme. Furthermore, the lower bound matches the upper bound in no main CSI extreme, where the secrecy capacity is equal to zero. Numerical results are provided for independent identically distributed (i.i.d.) Rayleigh fading channels.

关键词： Integrated circuits Channel estimation Signal to noise ratio Cryptography Antennas

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Outage Probability of Dual-Hop Partial Relay Selection with Feedback Delay in the Presence of Interference

Outage Probability of Dual-Hop Partial Relay Selection with ...

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IEEE International Symposium on Personal, Indoor and Mobile Radio Communications

作者： Fawaz S. Al-Qahtani Redha M. Radaydeh Hussein Alnuweiri Electrical & Computer Engineering Program Texas A&M University at Qatar Division of Physical Science and Engineering King Abdullah University of Science and Technology (KAUST)

ISBN: (纸本)9781457713460

In this paper, we investigate the outage performance of a dual-hop relaying systems with partial relay selection and feedback delay. The analysis considers the case of Rayleigh fading channels when the relaying station as well as the destination undergo mutually independent interfering signals. Particularly, we derive the cumulative distribution function (c.d.f.) of a new type of random variable involving sum of multiple independent exponential random variables, based on which, we present closed-form expressions for the exact outage probability of a fixed amplify-and-forward (AF) and decode-and-forward (DF) relaying protocols. Numerical results are provided to illustrate the joint effect of the delayed feedback and co-channel interference on the outage probability.

关键词： Random variable relaying Feedback relay Delayed Feedback Cochannel interference Raleigh fading channels interference destination

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Automatic Generation of Balletic Motions

Automatic Generation of Balletic Motions

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IEEE/ACM International Conference on Cyber-Physical Systems (ICCPS)

作者： Amy LaViers Magnus Egerstedt Yushan Chen Calin Belta School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA Department of Electrical and Computer Engineering Boston University Boston MA USA Department of Mechanical Engineering Division of Systems Engineering and the Bioinformatics Graduate Program Boston University MA USA

As cyber-physical systems become more prevalent, specifications for these systems must be formulated in a more nuanced manner. This paper presents a particular instantiation of such specification by proposing a framework that endows robotic motions with a sense of aesthetic style. Drawing inspiration from classical ballet, poses are cast as discrete states and movements as the transitions between these states. Thus, a given movement style is encoded in the availability of transitions at each state, and the dynamics of a complex physical trajectory are abstracted as a system which moves between these states. Using Linear Temporal Logic (LTL), we are able to further constrain the set of possible sequences through the transition system and thus prevent it from evolving through a sequence of states that is physically impossible or aesthetically undesirable. Our overarching objective is to facilitate subtle degrees of control over systems as such subtleties are required, more and more, to interact in a social and aesthetically driven world.

关键词： Automata Leg Legged locomotion Humans Trajectory Hip

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GaN-Based Neutron Scintillators with a 6 LiF Conversion Layer

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MRS Online Proceedings Library 2011年第1期1396卷 130-133页

作者： Andrew G. Melton Eric Burgett Nolan Hertel Ian T. Ferguson Department of Electrical and Computer Engineering University of North Carolina at Charlotte Charlotte USA Nuclear Engineering Program Idaho State University Pocatello USA Nuclear Engineering and Radiological Engineering Program George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta USA

Thin film gallium nitride (GaN) scintillators have been produced by MOCVD and made neutron-sensitive by applying an enriched lithium-6 fluoride (6LiF) conversion layer. The 6Li(n,α) reaction produces both alpha and triton particles, which have very penetration depths in GaN. The range and energy deposition characteristics of these particles in GaN have been simulated. Alpha-induced scintillation was measured in silicon-doped GaN using an americium-241 (241Am) source. The thermal neutron responses of the 6LiF-coated GaN scintillator were tested using two thermal neutron sources, an 241Am-Be source inside a graphite pile and a reactor source. The scintillator was found to have a linear response to thermal neutron flux level over a range of more than three orders of magnitude.

关键词： Ga neutron irradiation nitride

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Mapping the domain of engineering education research: Network approaches to bibliometric data collection and analysis

Mapping the domain of engineering education research: Networ...

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作者： Strobel, Johannes Radcliffe, David F. Rajan, Prashant Nawaz, Sadia Luo, Yi Choi, Jea H. INSPIRE Institute for P-12 Engineering Research and Learning Department of Engineering Education and Educational Technology Purdue University United States Department of Engineering Education School of Engineering Education Purdue University West Lafayette United States Department of Communication Purdue University West Lafayette United States School of Electrical and Computer Engineering Purdue University West Lafayette United States Learning Design and Technology Program Purdue University United States

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Improvement of LVRT capability of variable speed wind turbine generators using SMES unit

Improvement of LVRT capability of variable speed wind turbin...

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IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia)

作者： A. M. Shiddiq Yunus A. Abu-Siada Mohammad A. S. Masoum Department of Mechanical Engineering Energy Conversion Study Program State of Polytechnic Ujung Pandang Makassar Indonesia Department of Electrical and Computer Engineering Curtin University of Technology Perth WA Australia

The ability of variable speed wind turbines technology to optimally tracking the power from wind energy has become the main reason of their popularity compared with the fixed speed wind turbines. In the earlier stage of connecting wind turbines (WTs) to the existing electricity grids, WTs were allowed to be disconnected from the grid in case of grid faults which might lead to the damage of the turbines. However, recently, the transmission system operators (TSOs) require to maintaining the connection of WTs with the grid to support the grid during fault and to assure the continuity of power supply. This requirement has been compiled in new grid codes in several countries. In this paper, super conducting magnetic energy storage (SMES) unit is used with two different types of variable speed wind turbine generators to comply with Spain grid codes. Results show that the low-voltage-ride-through (LVRT) of Type-3 and Type-4 wind turbine generators are significantly improved when SMES unit is connected to the system.

关键词： Wind turbines Coils Voltage fluctuations Generators Choppers Shafts Safety

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