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2014 IEEE 57th International Midwest Symposium on Circuits and systems, MWSCAS 2014

作者： Elgothamy, Hatem Zohdy, Mohamed A. Abdel-Aty-Zohdy, Hoda S. Microelectronics and Bio-Inspired Systems Design Lab Department of Electrical and Computer Engineering Oakland University RochesterMI United States

ISBN: (纸本)9781479941346

This paper introduces an enhanced Genetic Algorithm GA that is faster and more efficient than the standard one. A simple 3D convex surface is optimized using different methods, Brute-Force, standard GA, and the enhanced GA. The enhanced GA is able to find the global minima within a certain range by using the least possible number of calculations, which, means less processing time and is robust to parameter selections. Special software was developed using Java for this purpose;also, MS-Excel was used to represent the data map as charts. © 2014 IEEE.

关键词： Genetic algorithms

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Corrigendum to “Initial prototype testing of Ray's Night Out: A new mobile app targeting risky drinking in young people” [Comput. Hum. Behav.] 54 (2016) 207–214

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computers in Human Behavior 2016年 64卷 939-939页

作者： Nina Pocuca Leanne Hides Oksana Zelenko Lake-Hui Quek Stoyan Stoyanov Kristen Tulloch Daniel Johnson Dian Tjondronegoro David J. Kavanagh Institute of Health and Biomedical Innovation (IHBI) School of Psychology and Counselling Faculty of Health Queensland University of Technology (QUT) Brisbane Australia The Young and Well Cooperative Research Centre (Young and Well CRC) Melbourne Australia School of Design Creative Industries Faculty Queensland University of Technology (QUT) Brisbane Australia Electrical Engineering and Computer Science School Science and Engineering Faculty Queensland University of Technology (QUT) Brisbane Australia Information Systems School Science and Engineering Faculty Queensland University of Technology (QUT) Brisbane Australia

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Quadratic MPC with 0-input constraint 19

Quadratic MPC with 0-input constraint

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19th IFAC World Congress on International Federation of Automatic Control, IFAC 2014

作者： Aguilera, Ricardo P. Delgado, Ramón Dolz, Daniel Agüero, Juan C. University of New South Wales Australia School of Electrical Engineering and Computer Science University of Newcastle Australia Department of Industrial Systems Engineering and Design Universitat Jaume I Castelló Spain

ISBN: (纸本)9783902823625

In this paper we propose a novel quadratic model predictive control technique that constrains the number of active inputs at each control horizon instant. This problem is known as sparse control. We use an iterative convex optimization procedure to solve the corresponding optimization problem subject to sparsity constraints defined by means of the 0-norm. We also derive a sufficient condition on the minimum number of active of inputs that guarantees the exponential stability of the closed-loop system. A simulation example illustrates the benefits of the control design method proposed in the paper. © IFAC.

关键词： Iterative methods

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Low Temperature Co-fired Ceramic Package for Lab-on-CMOS Applied in Cell Viability Monitoring

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Procedia engineering 2015年 120卷 1079-1082页

作者： Niina Halonen Joni Kilpijärvi Maciej Sobocinski Timir Datta-Chaudhuri Antti Hassinen Someshekar B. Prakash Peter Möller Pamela Abshire Elisabeth Smela Sakari Kellokumpu Anita Lloyd Spetz Microelectronics and Materials Physics Laboratories Department of Electrical Engineering P.O. Box 4500 FI-90014 University of Oulu Finland Laboratory for MicroTechnologies Department of Mechanical Engineering and the Institute for Systems Research A. James Clark School of Engineering University of Maryland College Park MD 20742 USA Integrated Biomorphic Information System Laboratory Department of Electrical & Computer Engineering and the Institute for Systems Research University of Maryland College Park MD 20742 USA Faculty of Biochemistry and Molecular Medicine University of Oulu P.O. Box 5400 FI-90014 University of Oulu Finland Advanced Design Organization Intel Corporation Hillsboro USA Division of Applied Sensor Science Department of Physics Chemistry and Biology Linköping University SE-58183 Linköping Sweden

Lab-on-CMOS chips (LOCMOS) are sophisticated miniaturized analysis tools based on integrated circuit (IC) microchips performing various laboratory functions. We have developed a low temperature co-fired ceramic (LTCC) package for a LOCMOS application regarding cytotoxicity assessment of nanomaterials. The LTCC packaged capacitance sensor chip is designed for long-term cell viability monitoring during nanoparticle exposure. The introduced LTCC package utilizes the flip chip bonding technique, and it is biocompatible as well as able to withstand the environmental conditions required to maintain mammalian cell culture directly on the surface of a complementary metal oxide semiconductor (CMOS) integrated circuit.

关键词： Lab-on-CMOS low temperature co-fired ceramics electronics packaging cytotoxicity assesment capacitance sensing

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Multiple speaker tracking with the Factorial von Mises-Fisher Filter

Multiple speaker tracking with the Factorial von Mises-Fishe...

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IEEE Workshop on Machine Learning for Signal Processing

作者： Johannes Traa Paris Smaragdis Department of Electrical and Computer Engineering UIUC Departments of Electrical and Computer Engineering and Computer Science Adobe Systems Inc.

Multiple-target tracking with a microphone array is often addressed via the Bayesian filtering framework. For compact arrays, each source is represented by its direction-of-arrival (DOA), which evolves on the unit sphere. The unique topology of this space leads to analytical intractabilities that are often resolved via costly particle-based methods. In this paper, we derive a novel, deterministic inference algorithm called the von Mises-Fisher Filter (vMFF) for a dynamical system model defined on the sphere, and extend it to the multi-source scenario in the Factorial vMFF (FvMFF). We apply sensor fusion and probabilistic data association techniques to handle clutter and data association ambiguities in the observation set. We show that the vMFF combines the computational efficiency of a Kalman filter with the tracking accuracy of a particle filter to perform well across all noise levels. Finally, we apply the FvMFF to track multiple speakers in a reverberant environment.

关键词： Vectors Arrays Kalman filters Microphones Bayes methods Approximation methods Inference algorithms

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Artificial vision support system (AVS2) for improved prosthetic vision

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Journal of Medical engineering and Technology 2014年第8期38卷 385-395页

作者： Fink, Wolfgang Tarbell, Mark A. Visual and Autonomous Exploration Systems Research Laboratory California Institute of Technology Division of Physics Mathematics and Astronomy 1200 E California Blvd PasadenaCA91125 United States Visual and Autonomous Exploration Systems Research Laboratory University of Arizona Departments of Electrical and Computer Engineering and Biomedical Engineering 1230 E Speedway Blvd P.O. Box 210104 TucsonAZ85721 United States

State-of-the-art and upcoming camera-driven, implanted artificial vision systems provide only tens to hundreds of electrodes, affording only limited visual perception for blind subjects. Therefore, real time image processing is crucial to enhance and optimize this limited perception. Since tens or hundreds of pixels/electrodes allow only for a very crude approximation of the typically megapixel optical resolution of the external camera image feed, the preservation and enhancement of contrast differences and transitions, such as edges, are especially important compared to picture details such as object texture. An Artificial Vision Support System (AVS2) is devised that displays the captured video stream in a pixelation conforming to the dimension of the epi-retinal implant electrode array. AVS2, using efficient image processing modules, modifies the captured video stream in real time, enhancing 'present but hidden' objects to overcome inadequacies or extremes in the camera imagery. As a result, visual prosthesis carriers may now be able to discern such objects in their 'field-of-view', thus enabling mobility in environments that would otherwise be too hazardous to navigate. The image processing modules can be engaged repeatedly in a user-defined order, which is a unique capability. AVS2 is directly applicable to any artificial vision system that is based on an imaging modality (video, infrared, sound, ultrasound, microwave, radar, etc.) as the first step in the stimulation/processing cascade, such as: retinal implants (i.e. epi-retinal, sub-retinal, suprachoroidal), optic nerve implants, cortical implants, electric tongue stimulators, or tactile stimulators. © 2014 Informa UK Ltd. All rights reserved.

关键词： Cameras

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On the Value of Storage at Consumer Locations

On the Value of Storage at Consumer Locations

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IEEE Power and Energy Society General Meeting

作者： Yunjian Xu Lang Tong Engineering Systems and Design Pillar Singapore University of Technology and Design School of Electrical and Computer Engineering Cornell University

ISBN: (纸本)9781479964161

We study the economic value of energy storage operated by a consumer who faces fluctuating electricity prices and seeks to reduce its energy costs. The value of storage is defined as the consumer's net benefit obtained by optimally operating the storage. We formulate the operation problem as a dynamic program. For a general setting with random electricity prices and stochastic demand, we show that by solving a sequence of (deterministic) convex optimization problems one can obtain an optimal operation policy as well as the value of storage. For an important special case where the consumer is faced with deterministic time-variant prices and (deterministic) inelastic demand, we propose a simple greedy algorithm that simultaneously computes the optimal operation policy and the economic value of a finite-capacity electric storage. We employ the proposed algorithm to numerically explore the value of storage under different pricing mechanisms.

关键词： Value of storage Energy storage operation Demand response Dynamic programming

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Integrating usability practices into agile development: A case study 23

Integrating usability practices into agile development: A ca...

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23rd International Conference on Information systems Development, ISD 2014

作者： Wale-Kolade, Adeola Y. Nielsen, Peter Axel Päivärinta, Tero Department of Information Systems University of Agder Kristiansand Norway Research Centre for Socio-Interactive Design Department of Computer Science Aalborg University Denmark Information Systems Department of Computer Science Electrical and Space Engineering Luleå University of Technology Luleå Sweden

ISBN: (纸本)9789536071432

Within agile software development there is a growing concern with how development organizations can integrate usability work into agile practices. The concern occurs as frustration experienced in practice by agile developers and usability designers, and it also occurs as a gap in the research literature. With this paper we report from a case study in a software company that is committed to agile development, to usability work, and to their integration. The theoretical starting point is an initial framework that has been elicited from the research literature;and the paper's contribution is an extension and modification of the initial framework based on our case study results. The resulting framework points to three enablers (attitudes, compromises, skills), three tasks (upfront design, low-fi prototyping, iterative evaluating), and three alternative modes of collaboration/work organization (parallel, embedded, fully integrated) in agile usability practices. In addition, end-user involvement may vary. The paper contributes by extending existing frameworks on integration and thus providing better explanations for practitioners and researchers of integration of usability.

关键词： Integration

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Performance Assessment and Optimization of Motion Planning in a Surgical Trainer for Potential Space Applications

Performance Assessment and Optimization of Motion Planning i...

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IEEE Aerospace Conference

作者： Aakarsh Rao Minsik Hong Akash Shankaran Wolfgang Fink Jerzy Rozenblit Model Based Design Laboratory Department of Electrical & Computer Engineering University of Arizona Visual and Autonomous Exploration Systems Research Laboratory Systems Departments of Electrical & Computer Engineering Biomedical Engineering Systems & Industrial Engineering Aerospace & Mechanical Engineering Ophthalmology & Vision Science Universi Department of Surgery University of Arizona

ISBN: (纸本)9781479916191

Medical surgeries in the space environment, including long term space travel (e.g., to Mars) and permanent presence on other planetary bodies (e.g., Moon and Mars), are posing an inherent logistical, and in the absence of appropriately trained personnel (i.e., surgeons), even a potentially life-threatening challenge. As a potential mitigation the use of an existing surgical trainer tool that would allow crewmembers to acquire basic surgical skills is proposed, and to train space station personnel both in space and on the Moon and Mars to hone these skills long-term. Furthermore, this tool would potentially allow for tele-conducted surgeries, akin to the da Vinci Surgical System, controlled from Earth but executed onboard, e.g., the International Space Station. On Earth the surgical trainer can be used to train surgeons and flight surgeons. The efficiency of any surgical training system plays a significant role in its reduction of operative risks and stress associated with insufficient experience of the trainee. The primary goal of such systems is to raise the trainee to a higher level of proficiency without putting patients at risk in the operating room. The prototype for the computer Assisted Surgical Trainer (CAST) being developed at the University of Arizona realizes an optimal motion-planning algorithm. The underlying system consists of mechanical fixtures equipped with encoders and DC motors. This hardware provides a means to accurately track the tip movements of laparoscopic instruments used in minimally invasive surgery. Furthermore it provides haptic and visual feedback to trainees by using a PID controller and augmented reality visualization. Examples of surgical guidance and the improvement of surgeon performance over time using CAST are presented.

关键词： Surgery Instruments Training Visualization Haptic interfaces Space stations Aerospace electronics

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Ecological Interface design for Knee and Hip Automatic Physiotherapy Assistant and Rehabilitation System

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Proceedings of the International Symposium on Human Factors and Ergonomics in Health Care 2014年第1期3卷 1 - 7页

作者： Yeti Li Catherine M. Burns Dana Kulić Department of Systems Design Engineering University of Waterloo Waterloo Ontario Canada Department of Electrical and Computer Engineering University of Waterloo Waterloo Ontario Canada

In this paper, we report on a recent interface design and evaluation process for a new knee and hip automatic physiotherapy assistant and rehabilitation system (ARS). Interface design was concurrent with the development of ARS. The ARS has the potential to improve the automation of rehabilitation treatments, by providing quantitative measures of a patient’s motion. However, the complexity of rehabilitation information available to the therapist has increased with this additional information. We applied Ecological Interface design (EID) to understand the domain of physiotherapy and the role of the automation. Results of a Work Domain Analysis (WDA) revealed new functions and constraints in rehabilitation now accessible through the ARS, and provided the design requirements for interface design. A novel interface was designed which is currently undergoing evaluation to see if it improves the quality and experience of physiotherapy. This study provides an example of the advantages of using EID at the early phase of design, and how to apply EID to a system of increasing automaticity.

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