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Biomedical Optics, BIOMED 2012

作者： Teh, Seng Khoon Zheng, Wei Li, Shuxia Li, Dong Zeng, Yan Yang, Yanqi Qu, Jianan Y. Biomedical Engineering Program Division of Bioengineering HKG China Biomedical Engineering Program Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Hong Kong Hong Kong Faculty of Dentistry University of Hong Kong Hong Kong

We explore in vivo diagnostic utility of an in-house developed multimodal nonlinear optical microscopy for detection of squamous epithelia precancer. Our results reveal all epithelial sublayers and stroma provide sign... 详细信息

ISBN: (纸本)9781557529428

关键词： Nonlinear optics

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Smart environmental architecture for node localization in a wireless sensor network

Smart environmental architecture for node localization in a ...

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8th International Conference on Intelligent Environments, IE 2012

作者： Jauregui-Ortiz, Salvador Siller, Mario Ramos, Felix Scalabrin, Edson Electrical Engineering and Computer Science Department Center of Research and Advanced Studies Guadalajara Jalisco Mexico Graduate Program in Computer Science Pontifical Catholic University Parana Brazil Curitiba Parana Brazil

ISBN: (纸本)9780769547411

As far as we know, there is not a Node Localization Algorithm (NLA) that presents the same accuracy for all possible scenarios. We believe that a NLA should be able to interpret the dynamic information of the environment. In this sense, simple NLAs are rather focused and might perform well for specific scenarios and applications. Therefore, information fusion and context awareness seems to be an appropriate approach to address this issue. We propose the Smart Environmental Architecture for Node Localization (SEA-NL), which is composed by two main elements: (i) the Smart Beacon Nodes (SBNs) and (ii) the Logical Position of Nodes (LPN). In (i) the obstruction level indicator is estimated and can improve the estimation of distances among nodes. In (ii) environment information and a one to one relation between a node and an object are used and can also improve location estimation. Via simulation, our architecture was tested indoors and outdoors considering three localization algorithms: the Weighed Centroid Localization (WCL), the Centroid Localization, and the Triangular Centroid Localization. Finally, we present an accuracy comparison among NLAs used in isolated way, and by using the SBNs, the LPN, and the SEA-NL, where our architecture improves WCL up to ~30.88%. © 2012 IEEE.

关键词： Information fusion

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Femtosecond plasmonic optical tweezers using gold bowtie nanoantenna arrays

Femtosecond plasmonic optical tweezers using gold bowtie nan...

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Frontiers in Optics, FIO 2012

作者： Roxworthy, Brian J. Toussaint, Kimani C. Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign Urbana IL 61801 United States Department of Mechanical Science and Engineering University of Illinois at Urbana-Champaign Urbana IL 61801 United States Affiliate in the Department of Electrical and Computer Engineering and Bioengineering University of Illinois at Urbana-Champaign Urbana IL 61801 United States

We demonstrate plasmonic optical trapping based on a femtosecond-pulsed input source and gold bowtie nanoantenna arrays. The femtosecond plasmonic tweezers allow for simultaneous manipulation and two-photon fluorescen... 详细信息

ISBN: (纸本)9781557529565

关键词： Plasmonics

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Ethics education & resources: A summary of issues facing the field and resources to address them

Ethics education & resources: A summary of issues facing the...

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119th ASEE Annual Conference and Exposition

作者： Bates, Rebecca A. Broome Jr., Taft H. Burge Jr., Legand L. Hollander, Rachelle Loui, Michael C. Computer Science Department Integrated Engineering Program Minnesota State University Mankato United States Department of Civil Engineering Howard University United States College of Engineering Department of Electrical Engineering Tuskegee University United States United States Department of Electrical and Computer Engineering University of Illinois Urbana-Champaign United States

ISBN: (纸本)9780878232413

The issues addressed in this paper and in the panel discussion are important for improving how the profession of engineering addresses ethical questions that arise in our field. We are called to provide our students with skills that will let them navigate not only the technical problems they will encounter but also the societal and ethical problems and nuances that often accompany the grand challenges as well as the everyday challenges engineers face. Participating in the online spaces and face-to-face conversations when possible will help form the resources into areas that are truly useful for practitioners. © 2012 American Society for engineering Education.

关键词： Students

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Hybrid clutter canceler with feedback guided predicative filtering on a heterogeneous parallel processing system

Hybrid clutter canceler with feedback guided predicative fil...

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International Waveform Diversity and Design Conference, WDD 2012

作者： Brinkhus, Jeffrey M. Jezak, Joseph A. Berdanier, Charles Levitan, Steven P. Chiarulli, Donald M. Electical and Computer Engineering University of Pittsburgh United States Computer Engineering Graduate Program University of Pittsburgh United States Electrical Engineering Wright State University United States Computer Science Department University of Pittsburgh United States

ISBN: (纸本)9781509005987

In this paper we describe a novel clutter cancellation platform based on a two stage approach that combines a feedback guided predictive front-end hybrid clutter canceller with high performance back-end filtering and target detection. The front-end architecture is based on an FPGA implementation of a Kalman filter that predicts target locations in real time and removes the target signals from the incoming data prior to hybrid cancellation. The back-end is user configurable and exploits high performance GPU and multi-core parallel hardware to simultaneously compute multiple clutter suppression and target detection algorithms coupled to an intelligent selection strategy for selecting the most accurate result. These target locations are fed back to the FPGA Kalman filter periodically to update the target predictions. © 2012 IEEE.

关键词： Kalman filters

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Accelerated DSP functions on the CBE for the X-Midas Toolkit

Accelerated DSP functions on the CBE for the X-Midas Toolkit

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International Waveform Diversity and Design Conference, WDD 2012

作者： Jezak, Joseph A. Berdanier, Charles Levitan, Steven P. Chiarulli, Donald M. Computer Engineering Graduate Program University of Pittsburgh United States USAF AFRL/RYMDA Wright Patterson Air Force Base United States Department of Electrical and Computer Engineering University of Pittsburgh United States Department of Computer Science University of Pittsburgh United States

ISBN: (纸本)9781509005987

We characterize the impact of the Cell Broadband Engine architecture, on commonly used radar DSP algorithms. We use the capabilities of the CBE to accelerate several key computational kernels including Matrix Multiplication, Matrix Inversion, and the Finite Impulse Response (FIR) filter. These algorithms are implemented and benchmarked as library routines within the X-Midas Toolkit. We observe speedups as large as 1200x for complex matrix multiplication, but speedups of 40x to 60x are more typical. We find that system I/O overhead within the X-Midas toolkit severely limited the performance of the applications. © 2012 IEEE.

关键词： FIR filters

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Shear wave elastography for characterizing muscle tissue in myofascial pain syndrome

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Proceedings of Meetings on Acoustics 2013年第1期19卷

作者： Diego Turo Paul Otto Tadesse Gebreab Katherine Armstrong Lynn H. Gerber Siddhartha Sikdar Department of Bioengineering George Mason University Fairfax VA 22030 Department of Electrical and Computer Engineering George Mason University Fairfax VA 22030 Department of Rehabilitation Science George Mason University Fairfax VA 22030 Department of Bioengineering George Mason University Fairfax VA

Myofascial pain syndrome (MPS) affects 85% of chronic pain sufferers in a specialty pain center. Neck and low-back are commonly affected by MPS. Myofascial trigger points (MTrPs) are characteristic findings of MPS and are palpable tender nodules in the muscles of symptomatic subjects. Mechanical characterization of MTrPs and surrounding tissue can offer important insight about the pathophysiology of the MPS. In this study, we propose an inexpensive technique, based on ultrasound shear wave elastography, to objectively measure mechanical properties of MTrPs and surrounding tissue in the upper trapezius. In an ongoing clinical study, we recruited 34 subjects: 12 healthy controls, 5 with latent (not spontaneously painful) MTrPs and 17 with symptomatic chronic neck pain and active (spontaneously painful) MTrPs. Shear wave elastography was performed on the upper trapezius of all subjects using the Ultrasonix RP system and an external vibrator. Voigt's model was used to estimate shear modulus G and viscosity μ of the interrogated tissue. Preliminary analysis demonstrates that symptomatic muscle tissue in subjects with neck pain is stiffer (G=10.45±11.36 kPa, mean±standard deviation) compared to muscle in control subjects (G=2.08±1.28 kPa) and that muscle tissue with latent MTrPs (μ=14.39±6.41 Pa*s) is more viscous than normal tissue (μ=9.02±3.92 Pa*s) (p<0.05).

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Forces of Orthodontic Closed Coil Springs Measured using Fiber Bragg Gratings

Forces of Orthodontic Closed Coil Springs Measured using Fib...

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Latin America Optics and Photonics Conference, LAOP 2012

作者： Milczewski, Maura Scandelari Dinisio, Felipe Gonçalves Martelli, Cicero Borges, Paulo César Kalinowski, Hypolito José da Cunha, José Carlos Munhoz Federal University of Technology - Paraná Curitiba80230-901 Brazil Graduate Program on Electrical Engineering and Applied Computer Science Canada Department of Mechanical Engineering Brazilian Dentistry Association Paraná Brazil

The aim of this study is to compare forces generated by three different orthodontic closed coil springs supplied by three companies, optical fiber Bragg gratins are used to evaluate the force of closing of springs. &#... 详细信息

ISBN: (纸本)9781557529589

关键词： Fiber Bragg gratings

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Neurofeedback for the treatment of schizophrenia: Case study

Neurofeedback for the treatment of schizophrenia: Case study

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2012 10th IEEE International Conference on Virtual Environments, Human-computer Interfaces, and Measurement Systems, VECIMS 2012

作者： Nan, Wenya Chang, Lanshin Rodrigues, Joao Pedro Wan, Feng Mak, Peng Un Mak, Pui-In Vai, Mang I. Rosa, Agostinho Department of Electrical and Computer Engineering Faculty of Science and Technology University of Macau China Department of Psychology Faculty of Social Sciences and Humanities University of Macau China Department of Bioengineering LaSEEB-System and Robotics Institute Technical University of Lisbon Portugal

ISBN: (纸本)9781457717574

The paper presents a case report of the therapy by neurofeedback training of a chronic female schizophrenia outpatient. The purpose of the neurofeedback training was to enhance cognition, memory and behavioral performance. We used an intensive approach. All the training sessions were performed during 4 consecutive days. The results showed that the patient learnt to increase individual alpha amplitude and simultaneously decrease beta2 (20-30 Hz) amplitude at P4 site during active state over sessions. The individual alpha increased 74.73% and beta2 decreased 13.73%. The short term memory was enhanced after training. Her mood had positive change and her speech was much clearer than before. She started to associate the meaning of her life and illness. These results support that neurofeedback is not only a feasible therapy for schizophrenia but also positive results could be obtained using a much more intensive training sessions than the one reported in the literature. © 2012 IEEE.

关键词： Neurofeedback Schizophrenia activity state Hercules

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All dielectric zero-index metamaterials at optical frequencies

All dielectric zero-index metamaterials at optical frequenci...

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2012 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2012

作者： Valentine, J. Moitra, P. Yang, Y. Wang, W. Department of Mechanical Engineering Vanderbilt University Nashville TN United States Interdisciplinary Program in Materials Science Vanderbilt University Nashville TN United States Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN United States

ISBN: (纸本)9781467330459

Dielectric metamaterials offer a potential low-loss alternative to plasmonic metamaterials at optical frequencies. However, demonstrations of dielectric metamaterials have so far been limited to microwave and mid-infrared frequencies. In this work, we outline the development of purely dielectric zero-index metamaterials operating at optical frequencies. The metamaterial, formed from silicon rods, exhibits impedance matching with air, resulting in unity transmission at the zero-index point. Design and experimental realization of the metamaterials is presented. The metamaterials can potentially be used for a number of applications including compact lens systems, directional emitters, and transformation optics devices. © 2012 IEEE.

关键词： Metamaterials

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