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Erratum to: Optimal minimal routing and priority assignment for priority-preemptive real-time NoCs

Real-Time systems 2017年第4期53卷 613-613页

作者： Borislav Nikolić Luís Miguel Pinho Institute of Computer and Network Engineering Technische Universität Braunschweig Braunschweig Germany CISTER/INESC-TEC ISEP IPP Porto Portugal

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Building an end user focused THz based ultra high bandwidth wireless access network: The TERAPOD approach

Building an end user focused THz based ultra high bandwidth ...

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International Conference on Ultra Modern Telecommunications and Workshops (ICUMT)

作者： Alan Davy Luis Pessoa Cyril Renaud Edward Wasige Mira Naftaly Thomas Kürner Glenn George Oleg Cojocari Niamh O'Mahony Marco A.G. Porcel Telecommunications Software & Systems Group Waterford Institute of Technology Ireland INESC TEC and Faculty of Engineering University of Porto Portugal University College London UK University of Glasgow UK National Physical Laboratory Teddington UK Technische Universitt Braunschweig Germany Bay Photonics UK ACST GmbH Germany Dell EMC Cork Ireland VLC Photonics S.L. Spain

The TERAPOD project aims to investigate and demonstrate the feasibility of ultra high bandwidth wireless access networks operating in the Terahertz (THz) band. The proposed TERAPOD THz communication system will be developed, driven by end user usage scenario requirements and will be demonstrated within a first adopter operational setting of a Data Centre. In this article, we define the full communications stack approach that will be taken in TERAPOD, highlighting the specific challenges and aimed innovations that are targeted.

关键词： Wireless communication Schottky diodes Oscillators Receivers Bandwidth Power generation

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Message Security for Automation and Control Applications based on IEC61131-3

Message Security for Automation and Control Applications bas...

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Future technologies Conference

作者： Aydin Homay Mario de Sousa Antonio Pina Martins Fred Kashefi SYSTEC - Research Center for Systems - Faculty of Engineering University of Porto Porto 4200-465 Portugal INESC TEC - INESC Technology and Science and Faculty of Engineering University of Porto Porto 4200-465 Portugal Computer Science and Engineering University of Texas at Arlington Arlington TX 76019-0015 USA

ISBN: (纸本)9781509041725

Cyber-Physical systems are integration of computer-based equipment used in industrial automation, embedded systems, control systems and etc. computer-based equipment needs to be protected against unauthorized access and control. The widely accepted approach to computer security is based on security in depth, meaning that the computer system is viewed as a layered structure and security is introduced at each of the layers. In this paper, we propose a method of adding security at what is commonly viewed as the lowest level of control the PLC. The approach is based on hashing the process variables or called signals. In this approach an attacking virus is not able to interpret the variables being addressed by the control logic, and therefore inhibiting targeted attacks by a virus wishing to subtly change the controlled system operation without actually destroying the controlled plant. The approach is focused towards DCS whose operation is based on maintaining all variables in an RTDB that exist in the RTOS and used by IEC61131-3 based application.

关键词： Message Virus Cybersecurity Authentication Industrial Control systems

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A contribution of demand response for the reliability of a power system

A contribution of demand response for the reliability of a p...

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IEEE International Conference on Environment and Electrical engineering

作者： Claudia Gaspar Alvaro Gomes Institute of Systems and Robotics Department of Electrical and Computer Engineering University of Coimbra 3030-290 Coimbra Portugal INESC Coimbra Department of Electrical and Computer Engineering University of Coimbra 3030-290 Coimbra Portugal

ISBN: (纸本)9781509023219

Reliability is a crucial issue in modern power systems, being, in simple words, the ability to continuously and efficiently supply loads without neglecting the quality of service while keeping the power grid stable. In general, reliability can be improved by using more reliable components (generators) or by adding redundancy, being this extra generation known as reserves. Insufficient reserve margin may originate instability and severe problems in power systems. Adequacy is related with the provision of sufficient generation resources to meet the demand and the reserves requirements. The higher the redundancy level the higher the costs, thus a trade-off between the reliability degree and the investment requirements is needed. In this work is investigated if controllable demand can be actively used as an alternative to generation units for guaranteeing adequate reliability indices in short term operation of power systems. The goal is assessing the feasibility of using demand side resources -controllable demand- instead of generation for improving the reliability indices. An evolution strategy has been implemented to design adequate control actions, to be applied over end-use loads, and their impacts on the reliability indices have been assessed. The obtained results showed that, when adequately designed, demand control actions can effectively contribute for a more reliable operation of the power system, being an alternative to the redundant generation in short term.

关键词： alternative generation units guaranteeing

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Obstacle detection and avoidance module for the blind

Obstacle detection and avoidance module for the blind

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Proceedings of the Biannual World Automation Congress

作者： Paulo Costa Hugo Fernandes João Barroso Hugo Paredes Leontios J. Hadjileontiadis Computer Graphics and Sound Research/CCIC Polytechnic Institute of Leiria Leiria Portugal INESC TEC (formerly INESC Porto) University of Trás-os-Montes e Alto Douro Vila Real Portugal Department of Electrical and Computer Engineering Aristotle University of Thessaloniki Thessaloniki Greece

Assistive technology enables people to achieve independence when performing daily tasks and it enhances their overall quality of life. Visual information is the basis for most navigational tasks, so visually impaired individuals are at disadvantage due to the lack of sufficient information about their surrounding environment. With recent advances in inclusive technology it is possible to extend the support given to people with visual disabilities in terms of their mobility. In this context we present and describe a wearable system (Blavigator project), whose global objective is to assist visually impaired people in their navigation on indoor and outdoor environments. This paper is focused mainly on the computer Vision module of the Blavigator prototype. We propose an object collision detection algorithm based on stereo vision. The proposed algorithm uses Peano-Hilbert Ensemble Empirical Mode Decomposition (PH-EEMD) for disparity image processing and a two layer disparity image segmentation to detect nearby objects. Using the adaptive ensemble empirical mode decomposition (EEMD) image analysis real time is not achieved, with PH-EEMD results on a fast implementation suitable for real time applications.

关键词： computer vision Empirical mode decomposition Two dimensional displays Global Positioning System Interpolation Visualization

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Optical clearing mechanisms characterization in muscle

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Journal of Innovative Optical Health Sciences 2016年第5期9卷 82-100页

作者： Luís Oliveira M.Inês Carvalho Elisabete Nogueira Valery V.Tuchin Physics Department–Polytechnic Institute of Porto School of Engineering Rua Dr.Antonio Bernardino de Almeida 4314200-072 PortoPortugal FEUP–University of Porto Rua Dr.Roberto Frias 4200-465 PortoPortugal CIETI–Centre of Innovation in Engineering and Industrial Technology ISEP Rua Dr.Antonio Bernardino de Almeida4314200-072 PortoPortugal DEEC/FEUP and INESC TEC University of Porto Rua Dr.Roberto Frias 4200-465 PortoPortugal Research-Education Institute of Optics and Biophotonics Saratov National Research State University 83 Astrakhanskaya street Saratov 410012Russia Laboratory of Laser Diagnostics of Technical and Living Systems Institute of Precision Mechanics and Control RAS 24 Rabochaya street Saratov 410028Russia Interdisciplinary Laboratory of Biophotonics Tomsk National Research State University 36 Lenin's avenue Tomsk 634050Russia

Optical immersion clearing is a technique that has been widely studied for more than two decades and that is used to originate a temporary transparency effect in biological *** applied in cooperation with clinical methods it provides optimization of diagnosis and treatment *** technique turns biological tissues more transparent through two main mechanisms-tissue dehydration and refractive index(RI)matching between tissue *** matching is obtained by partial replacement of interstit ial water by a biocompat ible agent that presents higher RI and it can be completely rever sible by natural rehydration in vrivo or by assisted rehydration in ex vivo *** data to characterize and discriminate between the two mechanisms and to find new ones are *** a simple method,based on collimated transmittance and thickness measurements made from muscle samples under treatment,we have estimated the diffusion properties of glucose,ethylene glycol(EG)and water that were used to perform such char acterization and *** these properties with data from literature that characterize their diffusion in water we have observed that musde cell membrane permeability limits agent and water diffusion in the *** same experi-mental data has allowed to calculate the optical dearing(OC)eficiency and make an inter-pretation of the internal changes that occurred in muscle during the *** same methodology can now be used to perform similar studies with other agents and in other tissues in order to solve engineering problems at design of inexpensive and robust technologies for a *** improvement of optical tomogr aphic techmiques with better contrast and in depth imaging.

关键词： Collimated transmittance agent diffusivity tissue dehydration thickness variation refractive index matching glucose ethylene glycol

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Structured Light System for Underwater Inspection Operations

Structured Light System for Underwater Inspection Operations

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OCEANS

作者： Flávio Lopes Hugo Silva José Miguel Almeida Alfredo Martins Eduardo Silva INESC TEC Institute for Systems and Computer Engineering of Porto ISEP - School of Engineering Porto Polytechnic Institute Porto Portugal

ISBN: (纸本)9781479987375

In this work we propose the development of a stereo SLS system for underwater inspection operations. We demonstrate how to perform a SLS calibration both in dry and underwater environments using two different methods. The proposed methodology is able to achieve quite accurate results, lower than 1 mm in dry environments. We also display a 3D underwater scan of a known object size, a sea scallop, where the system is able to perform a scan with a global error lower than 2% of the object size.

关键词： Underwater vision system Camera Line laser Structured light system

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A novel portable, low-cost kinect-based system for motion analysis in neurological diseases

A novel portable, low-cost kinect-based system for motion an...

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

作者： João Paulo Silva Cunha Ana Patricia Rocha Hugo Miguel Pereira Choupina José Maria Fernandes Maria José Rosas Rui Vaz Felix Achilles Anna Mira Loesch Christian Vollmar Elisabeth Hartl Soheyl Noachtar Institute for Systems Engineering and Computers - Technology and Science (INESC TEC) and Faculty of Engineering (FEUP) Universidade do Porto Porto Porto PT Institute of Electronics and Telematics Engineering of Aveiro (IEETA) University of Aveiro Aveiro Portugal Movement Disorders Group São João University Hospital Porto Portugal Neurosciences Unit University of Porto Porto Portugal Epilepsy Center University of Munich Munich Germany Chair for Computer Aided Medical Procedures Technische Universität München Munich Germany

Many neurological diseases, such as Parkinson's disease and epilepsy, can significantly impair the motor function of the patients, often leading to a dramatic loss of their quality of life. Human motion analysis is regarded as fundamental towards an early diagnosis and enhanced follow-up in this type of diseases. In this contribution, we present NeuroKinect, a novel system designed for motion analysis in neurological diseases. This system includes an RGB-D camera (Microsoft Kinect) and two integrated software applications, KiT (KinecTracker) and KiMA (Kinect Motion Analyzer). The applications enable the preview, acquisition, review and management of data provided by the sensor, which are then used for motion analysis of relevant events. NeuroKinect is a portable, low-cost and markerless solution that is suitable for use in the clinical environment. Furthermore, it is able to provide quantitative support to the clinical assessment of different neurological diseases with movement impairments, as demonstrated by its usage in two different clinical routine scenarios: gait analysis in Parkinson's disease and seizure semiology analysis in epilepsy.

关键词： Three-dimensional displays Epilepsy Cameras Monitoring Two dimensional displays Data acquisition

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Turtlebot at Office: A Service-Oriented Software Architecture for Personal Assistant Robots Using ROS

Turtlebot at Office: A Service-Oriented Software Architectur...

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IEEE International Conference on Autonomous Robot systems and Competitions (ICARSC)

作者： Anis Koubâa Mohamed-Foued Sriti Yasir Javed Maram Alajlan Basit Qureshi Fatma Ellouze Abdelrahman Mahmoud Prince Sultan University College of Computer and Information Sciences Saudi Arabia CISTER/INESC-TEC Polytechnic Institute of Porto Porto Portugal Cooperative Networked Intelligent Systems (COINS) Research Group Saudi Arabia Al-Imam Mohammad Ibn Saud Islamic University Saudi Arabia College of Computer and Information Sciences King Saud University Riyadh Saudi Arabia National Engineering Institute of Sfax (ENIS) Tunisia Gaitech International Ltd. Honk Kong German University of Cairo Egypt

ISBN: (纸本)9781509022564

This paper presents the design of an assistive mobile robot to support people in their everyday activities in office and home environments. The contribution of this paper consists in the design of a modular component-based software architecture that provides different abstraction layers on top of Robot Operating System (ROS) to make easier the design and development of service robots with ROS. The first abstraction layer is the COROS framework composed of complementary software subsystems providing different interfaces between ROS and the client applications. The second abstraction layer is the integration of Web services into ROS to allow client applications to seamlessly and transparently interact with the robot while hiding all implementation details. The proposed software architecture was validated through a experimental prototype of Turtlebot deployed in University campus. Furthermore, we outline the challenges incurred during experimentation and focus on lessons learned throughout the implementation and deployment.

关键词： Service robots computer architecture Robot sensing systems Web services

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Robust Mobile Robot Localization Based on Security Laser Scanner

Robust Mobile Robot Localization Based on Security Laser Sca...

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IEEE International Conference on Autonomous Robot systems and Competitions (ICARSC)

作者： Héber Sobreira A. Paulo Moreira Paulo Gomes Costa José Lima INESC TEC (formerly INESC PORTO) - Robotics and Intelligent Systems Faculty of Engineering of University Porto Portugal Portugal INESC TEC (formerly INESC PORTO) - Robotics and Intelligent Systems Polytechnic Institute of Bragança Bragança Portugal

This paper addresses the development of a new localization system based on a security laser presented on most AGVs for safety reasons. An enhanced artificial beacons detection algorithm is applied with a combination of a Kalman filter and an outliers rejection method in order to increase the robustness and precision of the system. This new robust approach allows to implement such system in current AGVs. Real results in industrial environment validate the proposed methodology.

关键词： Lasers Measurement by laser beam Security Filtering algorithms Kalman filters Mobile robots

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