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IEEE Southeastcon

作者： Gabriel Vázquez Ramos Jiann-Shiun Yuan Launch Services Program (Mail Code: V A-H3) John F. Kennedy Space Center NASA FL USA Department of Electrical Engineering and Computer University of Central Florida Orlando FL USA

Lately there has been a growing interest in the wireless power transfer systems (WPT) research. However, little (if any) has been researched on the effects of these systems into other sub-systems or devices. Since the principle of operation is by inducing a magnetic field to transfer power wirelessly, electromagnetic emissions could damage or induce a monetary error in other systems. This study was performed to enhance the understanding of how WPT systems should be tested to determine if they are electromagnetically compatible with other systems operating in close proximity. Since the primary focus of this study is to evaluate the possibility of using wireless power transfer systems for space applications, a WPT prototype was tested following military standard guidelines (used for NASA space applications). A WPT prototype (~4W) was tested to demonstrate the described approach. Results showed that the system radiated magnetic and electric fields that where within the limits established by the Mil-Std-461E. A similar approach can be taken to determine household WPT systems EMC compliance by applying the Federal Communications Commission and the Comité Européen standards.

关键词： Magnetic separation Magnetic resonance Magnetic field measurement Prototypes Military standards Electromagnetic compatibility

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A framework for relating neural activity to freely moving behavior

A framework for relating neural activity to freely moving be...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Justin D. Foster Paul Nuyujukian Oren Freifeld Stephen I. Ryu Michael J. Black Krishna V. Shenoy Department of Electrical Engineering University of Stanford Stanford CA USA Bioengineering and Stanford Medical School University of Stanford Stanford CA USA Division of Applied Mathematics Brown University Providence RI USA Department of Neurosurgery Palo Alto Medical Foundation Palo Alto CA USA Department of Computer Science Brown University Providence RI USA Departments of Electrical Engineering Bioengineering and Neurobiology Neurosciences Program Neurosciences Program University of Stanford Stanford CA USA

Two research communities, motor systems neuroscience and motor prosthetics, examine the relationship between neural activity in the motor cortex and movement. The former community aims to understand how the brain controls and generates movement; the latter community focuses on how to decode neural activity as control signals for a prosthetic cursor or limb. Both have made progress toward understanding the relationship between neural activity in the motor cortex and behavior. However, these findings are tested using animal models in an environment that constrains behavior to simple, limited movements. These experiments show that, in constrained settings, simple reaching motions can be decoded from small populations of spiking neurons. It is unclear whether these findings hold for more complex, full-body behaviors in unconstrained settings. Here we present the results of freely-moving behavioral experiments from a monkey with simultaneous intracortical recording. We investigated neural firing rates while the monkey performed various tasks such as walking on a treadmill, reaching for food, and sitting idly. We show that even in such an unconstrained and varied context, neural firing rates are well tuned to behavior, supporting findings of basic neuroscience. Further, we demonstrate that the various behavioral tasks can be reliably classified with over 95% accuracy, illustrating the viability of decoding techniques despite significant variation and environmental distractions associated with unconstrained behavior. Such encouraging results hint at potential utility of the freely-moving experimental paradigm.

关键词： Legged locomotion Maximum likelihood decoding Kinematics Animals Educational institutions Cameras Neuroscience

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Response of varactors containing DNA-conjugated polymer

Response of varactors containing DNA-conjugated polymer

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Midwest Symposium on Circuits and Systems (MWSCAS)

作者： Carrie M. Bartsch Jack P. Lombardi Roberto S. Aga Robert G. Lorenzini Whitney M. Kline Gregory Sotzing Emily M. Heckman Guru Subramanyam Air Force Research Laboratory OH USA General Dynamics Information Technology Dayton OH USA Department of Chemistry and the Polymer Program University of Connecticut Storrs CT USA Department of Electrical and Computer Engineering University of Dayton Dayton OH USA

We study the effect on the microwave S-parameters of adding a conjugated polymer layer to a deoxyribonucleic acid-based (DNA-based) biopolymer within a variable capacitor (varactor) using a capacitive test structure. The conjugated polymer we are using in this work is poly(3-hexylthiophene-2,5-diyl) (P3HT) and the DNA-based biopolymer is DNA-CTMA. The results are compared to both the baseline DNA-based biopolymer and the conjugated polymer layer added to a layer of polyvinyl alcohol. The addition of the conjugated polymer layer underneath the DNA-based biopolymer is found to most significantly improve the stability and dielectric tuning of the DNA-based biopolymer.

关键词： Polymers Tuning Dielectric measurements Scattering parameters Capacitors

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Cortex Inspired Model for Inverse Kinematics Computation for a Humanoid Robotic Finger

Cortex Inspired Model for Inverse Kinematics Computation for...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Rodolphe J. Gentili Hyuk Oh Javier Molina James A. Reggia José L. Contreras- Vidal Department of Kinesiology School of Public Health Maryland Robotics Center Neuroscience and Cognitive Science Program University of Maryland College Park MD 20742 USA Neuroscience and Cognitive Science Program University of Maryland College Park MD 20742 USA Department of Systems Engineering and Automation Technical University of Cartagena 30202 Cartagena Spain Department of Computer Science University of Maryland Institute for Advanced Computer Studies University of Maryland College Park MD 20742 USA Department of Electrical and Computer Engineering University of Houston Houston TX 77004 USA

ISBN: (纸本)9781424441198

In order to approach human hand performance levels, artificial anthropomorphic hands/fingers have increasingly incorporated human biomechanical features. However, the performance of finger reaching movements to visual targets involving the complex kinematics of multijointed, anthropomorphic actuators is a difficult problem. This is because the relationship between sensory and motor coordinates is highly nonlinear, and also often includes mechanical coupling of the two last joints. Recently, we developed a cortical model that learns the inverse kinematics of a simulated anthropomorphic finger. Here, we expand this previous work by assessing if this cortical model is able to learn the inverse kinematics for an actual anthropomorphic humanoid finger having its two last joints coupled and controlled by pneumatic muscles. The findings revealed that single 3D reaching movements, as well as more complex patterns of motion of the humanoid finger, were accurately and robustly performed by this cortical model while producing kinematics comparable to those of humans. This work contributes to the development of a bioinspired controller providing adaptive, robust and flexible control of dexterous robotic and prosthetic hands.

关键词： reaching prosthetic providing

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A Taxonomy for User-Healthcare Robot Interaction

A Taxonomy for User-Healthcare Robot Interaction

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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Conrad Bzura Hosung Im Tammy Liu Kevin Malehorn Taskin Padir Bengisu Tulu Biomedical Engineering Department Worcester Polytechnic Institute Worcester MA 01609 USA Robotics Engineering Program Worcester Polytechnic Institute Worcester MA 01609 USA Management Information Systems Program Worcester Polytechnic Institute Worcester MA 01609 USA Assistant Professor of Robotics Engineering and Electrical and Computer Engineering Worcester Polytechnic Institute Worcester MA 01609 USA Assistant Professor in the School of Business Worcester Polytechnic Institute Worcester MA 01609 USA

ISBN: (纸本)9781424441198

This paper evaluates existing taxonomies aimed at characterizing the interaction between robots and their users and modifies them for health care applications. The modifications are based on existing robot technologies and user acceptance of robotics. Characterization of the user, or in this case the patient, is a primary focus of the paper, as they present a unique new role as robot users. While therapeutic and monitoring-related applications for robots are still relatively uncommon, we believe they will begin to grow and thus it isimportant that the spurring relationship between robot and patient is well understood.

关键词： understood relationship isimportant

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Corrigendum to “Cost-minimized combinations of wind power, solar power and electrochemical storage, powering the grid up to 99.9% of the time” [J. Power Sources 225 (2013) 60–74]

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Journal of Power Sources 2013年 232卷 402-402页

作者： Cory Budischak DeAnna Sewell Heather Thomson Leon Mach Dana E. Veron Willett Kempton Department of Electrical and Computer Engineering University of Delaware Newark DE 19716 USA Department of Energy Management Delaware Technical Community College 400 Stanton-Christiana Road Newark DE 19713 USA Center for Carbon-Free Power Integration School of Marine Science and Policy College of Earth Ocean and Environment University of Delaware Newark DE 19716 USA Energy and Environmental Policy Program College of Engineering University of Delaware Newark DE 19716 USA Center for Electric Technology DTU Elektro Danmarks Tekniske Universitet Kgs. Lungby Denmark

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Modeling of Visuospatial Perspectives Processing and Modulation of the Fronto-Parietal Network Activity during Action Imitation

Modeling of Visuospatial Perspectives Processing and Modulat...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Hyuk Oh Rodolphe J. Gentili James A. Reggia José L.Contreras-Vidal Neuroscience and Cognitive Science Program University of Maryland College Park MD 20742 USA Department of Kinesiology the Maryland Robotics Center and the Neuroscience and Cognitive Science Program University of Maryland College Park MD 20742 USA Department of Computer Science and the University of Maryland Institute for Advanced Computer Studies University of Maryland College Park MD 20742 USA Department of Electrical and Computer Engineering University of Houston Houston TX 77004 USA

ISBN: (纸本)9781424441198

It has been suggested that the human mirror neuron system (MNS) plays a critical role in action observation and imitation. However, the transformation of perspective between the observed (allocentric) and the imitated (egocentric) actions has received little attention. We expand a previously proposed biologically plausible MNS model by incorporating general spatial transformation capabilities that are assumed to be encoded by the intraparietal sulcus (IPS) and the superior parietal lobule (SPL) as well as investigating their interactions with the inferior frontal gyrus and the inferior parietal lobule. The results reveal that the IPS/SPL could process the frame of reference and the viewpoint transformations, and provide invariant visual representations for the temporo-parieto-frontal circuit. This allows the imitator to imitate the action performed by a demonstrator under various perspectives while replicating results from the literatures. Our results confirm and extend the importance of perspective transformation processing during action observation and imitation.

关键词： importance observation transformation

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Model guided adaptive design and Analysis in computer experiment

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Statistical Analysis and Data Mining 2012年第5期5卷 399-409页

作者： Yu, Qingzhao Li, Bin Fang, Zhide Peng, Lu Biostatistics Program School of Public Health Louisiana State University Health Sciences Center New Orleans LA United States Department of Experimental Statistics Louisiana State University Baton Rouge LA United States Department of Electrical and Computer Engineering Louisiana State University Baton Rouge LA United States

computer experiments have become increasingly important in several different industries. These experiments save resources by exploring different designs without necessitating real hardware manufacturing. However, computer experiments usually require lengthy simulation times and powerful computational capacity. Therefore, it is often pragmatically impossible to run experiments on a complete design space. In this paper, we propose an adaptive sampling scheme that interactively works with predictive models to sequentially select design points for computer experiments. The selected samples are used to build predictive models, which in turn guide further sampling and predict the entire design space. For illustration, we use Bayesian additive regression trees (BART), multiple additive regression trees (MART), treed Gaussian process and Gaussian process to guide the proposed sampling method. Both real data and simulation studies show that our sampling method is effective in that (i) it can be used with different predictive models;(ii) it can select multiple design points without repeatedly refitting the predictive models, which makes parallel simulations possible and (iii) the predictive model built on its generated samples gives more accurate predictions on the unsampled points than the models built on samples from other methods such as random sampling, space-filling designs and some adaptive sampling methods. © 2012 Wiley Periodicals, Inc.

关键词： Sampling

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FEM simulation to characterize wireless electric power transfer elements

FEM simulation to characterize wireless electric power trans...

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IEEE Southeastcon

作者： Gabriel Vázquez Ramos Jiann-Shiun Yuan John F. Kennedy Space Center Launch Services Program Mail Code: V A-H3 National Aeronautics and Space Administration FL USA Department of Electrical Engineering and Computer University of Central Florida Orlando FL USA

Wireless power transfer systems are expected to be a new mean for power distribution in the non-distant future for household electronics and handheld devices. However, even with the progress achieved to date, it is difficult to find literature that address the Federal Communications Commission, the Comité Européen or Military Standards compliance for electromagnetic emissions. This paper provides further insight for electromagnetic compatibility (EMC) compliance and coupling characterization considerations by performing Finite Element Method simulations. It was demonstrated by model simulation that Finite Element Method (FEM) provides adequate design insight for possible EMC compliance concerns before proceeding to the prototype phase. In addition, it was also demonstrated that FEM simulation provides adequate coupling characterization to determine the range of the wireless power transfer element as well as its optimal frequency of operation based on the separation distance between the transmitter element and the receiver element.

关键词： Finite element methods Electromagnetics Transmitters Coils Europe Wireless communication Analytical models

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Teaching digital logic design using the GOAL (Guided On-demand Adaptive Learning) system

Teaching digital logic design using the GOAL (Guided On-dema...

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118th ASEE Annual Conference and Exposition

作者： Williams, Ronald D. Dugan, Joanne Bechta Department of Electrical and Computer Engineering Computer Engineering Program University of Virginia United States

GOAL combines advances in technology with advances in understanding of human learning to teach engineering concepts more efficiently. GOAL can improve the efficiency and availability of engineering instruction both on-demand asynchronous learning and in the traditional classroom. GOAL will automate and improve the delivery of facts and concepts, broaden access to this material, and create opportunities for the inclusion of additional material. The GOAL project exploits results from research into the way people learn combined with technology providing instruction using established techniques for effective teaching. This work recognizes that different students learn in different ways, at different times and places, and at different rates. This project provides instructional guidance available ondemand at times and places convenient to each student. Our instruction is adaptive so that the student can proceed at his or her own pace using instructional techniques best suited to their own individual learning styles while their progress can be tracked and their instruction can be adjusted in response to their actions. GOAL modules are not easy or inexpensive to produce, especially if compared with recorded lectures or slide presentations with recorded voice channels. The verbal content is scripted, recorded in a sound booth, filtered and processed into short segments of about a minute's length or less. The visual content is developed using Adobe® Flash®, Soundbooth®, Fireworks® and other tools and is carefully synchronized with the audio track. It seems to take about a hour's time to produce a segment of about a minute's length. Of course, once a segment is developed it can be used infinitely often. Detailed data is collected as the concepts are taught to attain new insight into the learning process. Student A viewed all the concepts at a single sitting with no pauses or rollbacks, indicating a more reflective approach to learning. Student B paused and restarted the presen

关键词： Students

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