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International Workshop on Wearable and Implantable Body Sensor Networks (BSN)

作者： Duarte Dias Nuno Ferreira João Paulo Silva Cunha Faculty of Engineering (FEUP) University of Porto Porto Portugal Institute for Systems Engineering and Computers - Technology and Science (INESC TEC) University of Porto Portugal

Current mobile revolution is leading to an increase of wearable health devices development and consequently a growth in ambulatory monitoring area. These systems can be applied in ambulatory diseases management and diagnosis, personal health monitoring or sports performance enhancement, providing physiological and body-area ambiance data during daily normal activities. Nowadays several devices in the market have this type of technology, being one of them the VitalJacket ® (VJ ® ), a product from Biodevices, S.A. This device is a medical certified smart t-shirt with textile embedded electronics for ambulatory monitoring of electrocardiogram (ECG), Heart Rate (HR) and Accelerometer (Acc) data that is in the market since 2008. In this work we report the result of a university-company joint R&D effort that aimed to propose a reference extension architecture - called VitalLogger - for VJ ® wearable health device that enables sensors seamless “plug-in” to the company product. As a proof of concept of this novel adaptable architecture, we jointly implemented a prototype that extends VJ ® technology to incorporate new sensing modules in a seamless way. Both hardware and firmware were re-designed and extended to create a reference extension architecture, enabling easy integration of different sensing modules according to the user monitoring preference/scenario. Besides the ECG module already incorporated in VJ ® , a module with a Blood Oxygen Saturation (SpO2) sensor and an ambiance temperature and relative humidity sensor was developed and added to the extended prototype VitalLogger. This prototype was successfully built and tested, showing excellent results. The VitalLogger adaptable extension architecture has shown its scalability by enabling seamless “plug-in” sensing modules thus creating the possibility of swift creations of new products with different sensors combinations to adapt to different monitoring scenarios.

关键词： Biomedical monitoring Monitoring Prototypes Temperature sensors Electrocardiography Testing

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Open data driven public accountability

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TRANSFORMING GOVERNMENT- PEOPLE PROCESS AND POLICY 2017年第1期11卷 42-57页

作者： Lourenco, Rui Pedro Piotrowski, Suzanne Ingrams, Alex Institute for Systems and Computer Engineering at Coimbra INESC University of Coimbra Coimbra Portugal Rutgers University Newark School of Public Affairs and Administration Rutgers University Newark New Jersey USA School of Public Affairs and Administration Rutgers University Newark New Jersey USA

Purpose To analyse extant literature on open data, distinguish and categorise the strands of public accountability research, and use the results to provide better clarity in the concept of open data driven public accountability. Design/methodology/approach Systematic review of 135 open data articles and 155 accountability articles from the E-Government Reference Library (EGRL). A multi-stage analysis results in 12 articles which are categorized using Bovens' (2007) accountability theory of information, discussion, and consequences. Based on the analysis results and literature analysis, conceptual development forms the final section of the paper. Findings Research demonstrates a range of open data topics have been advanced. However, just 12 articles exist that simultaneously address open data and accountability theory. Of the total 155 public accountability articles, the preponderant focus is on the information (N = 25) and discussion (N = 7) stages of the accountability process. Just 1 article focuses on the complete accountability process. Addressing this problem, our characterization of open [government] data driven public accountability establishes conceptual crispness and clarity. Originality/value Public accountability theory on open government has become overshadowed by social and economic value perspectives. This paper clarifies and moves forward the open data driven public accountability perspective. It takes stock of public accountability research, delimits the key issues and questions, and highlights the next steps needed for developing scholarship.

关键词： public accountability open government open data e-government e-democracy e-participation

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Real-time dense wired sensor network based on traffic shaping

Real-time dense wired sensor network based on traffic shapin...

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IEEE International Conference on Embedded and Real-Time Computing systems and Applications (RTCSA)

作者： João Loureiro Raghuraman Rangarajan Borislav Nikolic Leandro Indrusiak Eduardo Tovar CISTER/INESC-TEC ISEP Polytechnic Institute of Porto Portugal Institute of Computer and Network Engineering Technische Universität Braunschweig Germany University of York UK

XDense is a novel wired 2D-mesh grid sensor network system for application scenarios that benefit from densely deployed sensing (e.g. thousands of sensors per square meter). It was conceived for closed-loop cyber-physical systems (CPS) that require real-time actuation, like active flow control (AFC) on aircraft wing surfaces. XDense communication and distributed processing capabilities are designed such that they enable to extract complex features within bounded time and in a responsive manner. In this paper we tackle the issue of deterministic behavior of XDense. We present a methodology that uses traffic shaping heuristics to guarantee bounded communication delays and the fulfillment of memory requirements. We evaluate the model for varied network configurations and workload, and demonstrate the effectiveness of running real-time applications supported on XDense.

关键词： Delays Ports (computers) Real-time systems Sensors Aircraft Feature extraction Mathematical model

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iW-Net: an automatic and minimalistic interactive lung nodule segmentation deep network

arXiv

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arXiv 2018年

作者： Aresta, Guilherme Jacobs, Colin Araújo, Teresa Cunha, António Ramos, Isabel van Ginneken, Bram Campilho, Aurélio INESC TEC - Institute for Systems and Computer Engineering Technology and Science Rua Doutor Roberto Frias Porto4200-465 Portugal Faculty of Engineering of University of Porto Rua Doutor Roberto Frias Porto4200-465 Portugal Radboud University Medical Center Nijmegen6525 Netherlands University of Trás-os-Montes e Alto Douro Quinta de Prados Vila Real5001-801 Portugal Faculty of Medicine of University of Porto Alameda Prof. Hernâni Monteiro Porto4200-319 Portugal

—We propose iW-Net, a deep learning model that allows for both automatic and interactive segmentation of lung nodules in computed tomography images. iW-Net is composed of two blocks: the first one provides an automatic segmentation and the second one allows to correct it by analyzing 2 points introduced by the user in the nodule’s boundary. For this purpose, a physics inspired weight map that takes the user input into account is proposed, which is used both as a feature map and in the system’s loss function. Our approach is extensively evaluated on the public LIDC-IDRI dataset, where we achieve a state-of-the-art performance of 0.55 intersection over union vs the 0.59 inter-observer agreement. Also, we show that iW-Net allows to correct the segmentation of small nodules, essential for proper patient referral decision, as well as improve the segmentation of the challenging non-solid nodules and thus may be an important tool for increasing the early diagnosis of lung cancer. Copyright © 2018, The Authors. All rights reserved.

关键词： computer aided diagnosis

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A successful parallel implementation of NSGA-II on GPU for the energy dispatch problem on hydroelectric power plants

A successful parallel implementation of NSGA-II on GPU for t...

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2016 IEEE Congress on Evolutionary Computation, CEC 2016

作者： De Oliveira, Lucas Braga Marcelino, Carolina G. Milanes, Anolan Almeida, Paulo E. M. Carvalho, Leonel M. Computer Engineering Departament CEFET-MG Belo Horizonte Brazil Centre for Power and Energy Systems CPES INESC TEC Portugal

ISBN: (纸本)9781509006229

Nowadays, hydraulic sources are responsible for most of the Brazil's energy production. Hydroelectric power plants (HPP) operators in Brazil usually distribute equally the total power required among the generator units available in the plant. However, studies show that this configuration does not guarantee that each generator unit operate close to its optimal operation point. The energy dispatch optimization problem consists in determining which generation units need to be on or off and what is their respective power-set, so that both the overall HPP costs is minimized and the power required by the plant is met. This paper presents a GPU-based parallel implementation of NSGA-II, to solve the energy dispatch problem of a HPP complaying with the real time restrictions posed by the operation of a real HPP from the reception of the power demand to the energy dispatch. Our implementation obtains better solutions than the sequential implementation currently available. © 2016 IEEE.

关键词： Hydroelectric power plants

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Partitioning and Analysis of the Network-on-Chip on a COTS Many-Core Platform

Partitioning and Analysis of the Network-on-Chip on a COTS M...

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IEEE Symposium on Real-Time and Embedded technology and Applications

作者： Matthias Becker Borislav Nikolic Dakshina Dasari Benny Akesson Vincent Nélis Moris Behnam Thomas Nolte MRTC / Mälardalen University Sweden Institute of Computer and Network Engineering Technische Universität Braunschweig Germany Robert Bosch GmbH Renningen Germany CISTER/INESC-TEC ISEP Portugal

ISBN: (纸本)9781509052707

Many-core processors can provide the computational power required by future complex embedded systems. However, their adoption is not trivial, since several sources of interference on COTS many-core platforms have adverse effects on the resulting performance. One main source of performance degradation is the contention on the Network-on-Chip (NoC), which is used for communication among the compute cores via the off-chip memory. Available analysis techniques for the traversal time of messages on the NoC do not consider many of the architectural features found on COTS platforms. In this work, we target a state-of-the-art many-core processor, the Kalray MPPAR ® . A novel partitioning strategy for reducing the contention on the NoC is proposed. Further, we present an analysis technique dedicated to the proposed partitioning strategy, which considers all architectural features of the COTS NoC. Additionally, it is shown how to configure the parameters for flow-regulation on the NoC, such that the Worst-Case Traversal Time (WCTT) is minimal and buffers never overflow. The benefits of our approach are evaluated based on extensive experiments that show that contention is significantly reduced compared to the unconstrained case, while the proposed analysis outperforms a state-of-the-art analysis for the same platform. An industrial case study shows the tightness of the proposed analysis.

关键词： Program processors computer architecture Interference Time division multiplexing Payloads Switches Network-on-chip

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Non-uniform deformation in Achilles tendon is not influenced by a change in knee angle or level of force production during isometric contractions

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Annals of Physical and Rehabilitation Medicine 2018年 61卷 e399-e399页

作者： Bogaerts, S. De Brito Carvalho, C. Groef, De Suetens, P. Peers, K. KU Leuven Department of Development and Regeneration Leuven Belgium University Hospitals Leuven Physical Medicine and Rehabilitation Leuven Belgium KU Leuven Department of Electrical Engineering- ESAT/PSI Leuven Belgium Institute for Systems and Computer Engineering Technology and Science (INESC TEC) Networked Intelligent Systems Porto Portugal KU Leuven Rehabilitation Sciences Leuven Belgium

Introduction/Background Mechanical loading has become the golden standard in managing achilles tendinopathy. The goal of this study was to evaluate the impact of different levels of force production and knee angle on the non-uniform behaviour in the achilles tendon during an isometric contraction. It was hypothesized that a flexed knee position would lead to a more non-uniform behaviour, due to greater differential loading of soleus versus gastrocnemius in this position, but that this effect would be attenuated by higher levels of force production. Material and method Nineteen healthy subjects participated in this study. A high-spatial and high-temporal resolution ultrasound system was used to acquire 2D + time ultrasound images during an isometric contraction at 25%, 50% and 75% MVC in the extended and flexed knee position. Local tendon tissue displacement and normalized displacement ratio of the different tendon layers were calculated. Results Contrary to the hypotheses, it was found that the non-uniform deformation, i.e. superficial-to-deep variation in displacement with highest displacement in the deep layer, is consistently present, irrespective of the level of force production and knee angle. Conclusion From clinical perspective, this might indicate the absence of a mechanical rationale for a change in knee angle during eccentric heel drops. Additionally, it was found that despite reaching high-levels of force, the contribution of the Achilles tendon might sometimes be relatively smaller, potentially due to compensatory actions. This is relevant for rehabilitation as the goal is to reach specific local tendon loading. Therefore, the tool used in this study might be ideally placed to monitor local Achilles tendon loading during rehabilitation and individually tailor exercises to reach that goal.

关键词： Tendinopathy Mechanical behaviour Ultrasound

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EyeQual: Accurate, Explainable, Retinal Image Quality Assessment

EyeQual: Accurate, Explainable, Retinal Image Quality Assess...

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International Conference on Machine Learning and Applications (ICMLA)

作者： Pedro Costa Aurelio Campilho Bryan Hooi Asim Smailagic Kris Kitani Shenghua Liu Christos Faloutsos Adrian Galdran Department of Electrical and Computer Engineering Carnegie Mellon University INESC TEC Porto Faculty of Engineering University of Porto Department of Statistics and Data Science Carnegie Mellon University Robotics Institute Carnegie Mellon University Chinese Academy of Sciences Institute of Computing Technology China School of Computer Science Carnegie Mellon University

Given a retinal image, can we automatically determine whether it is of high quality (suitable for medical diagnosis)? Can we also explain our decision, pinpointing the region or regions that led to our decision? Images from human retinas are vital for the diagnosis of multiple health issues, like hypertension, diabetes, and Alzheimer's; low quality images may force the patient to come back again for a second scanning, wasting time and possibly delaying treatment. However, existing retinal image quality assessment methods are either black boxes without explanations of the results or depend heavily on feature engineering or on complex and error-prone anatomical structures' segmentation. Therefore, we propose EyeQual, that solves exactly this problem. EyeQual is novel, fast for inference, accurate and explainable, pinpointing low-quality regions on the image. We evaluated EyeQual on two real datasets where it achieved 100% accuracy taking just 36 milliseconds for each image.

关键词： Retina Image quality Diabetes Standards Retinopathy Machine learning Graphical models

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UAV Trials for Multi-Spectral Imaging Target Detection and Recognition in Maritime Environment

UAV Trials for Multi-Spectral Imaging Target Detection and R...

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OCEANS MTS/IEEE Monterey (Conference)

作者： Hugo Silva Jose Miguel Almeida Flavio Lopes J. P. Ribeiro Sara Freitas Guilherme Amaral Carlos Almeida Alfredo Martins Eduardo Silva INESC TEC Institute for Systems and Computer Engineering of Porto ISEP - School of Engineering Porto Polytechnic Institute

ISBN: (纸本)9781509015276

This paper addresses the use of heterogeneous sensors for target detection and recognition in maritime environment. An Unmanned Aerial Vehicle payload was assembled using hyperspectral, infrared, electro-optical, AIS and INS information to collect synchronized sensor data with vessel ground-truth position for conducting air and sea trials. The data collected is used to develop automated robust methods for detect and recognize vessels based on their exogenous physical characteristics and their behaviour across time. Data Processing preliminary results are also presented.

关键词： Target Detection Target Tracking Hyperspectral Imaging Infrared Imaging Unmanned Aerial Vehicle Remote sensing Georeferencing

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Energetic system with biomass and how to mitigate associated problems

Energetic system with biomass and how to mitigate associated...

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International Youth Conference on Energetics (IYCE)

作者： Adelino S. Nabais João R. Galvão Rita M. T. Ascenso Sérgio A. Leitão Department of Energy and Environment Leiria Polytechnic Institute Portugal Department of Computer Science Leiria Polytechnic Institute Portugal Department of Electrical Engineering R&D Unit Portugal INESC-TEC (UTAD pole) School of Sciences and Technology Vila Real Portugal

In this work we present a greenhouse case study with a new energy model based on a Biomass energy source, once it is a more profitable and sustainable energy system, but demands special safety measures. Biomass has so... 详细信息

关键词： Biomass Combustion Boilers Green products Explosions Temperature measurement

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