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Power tech Conference

作者： André Rodrigues de Oliveira José Villar Collado João Tomé Saraiva Salvador Doménech Fco. Alberto Campos INESC TEC – Institute for Systems and Computer Engineering Technology and Science Porto Portugal Faculdade de Engenharia da Universidade do Porto Porto Portugal Institute for Research in Technology Technical School of Engineering Comillas Pontifical University c/ Santa Cruz de Marcenado Madrid Spain

The green hydrogen (H2) technology has an important role to play in the European Union energy strategy towards decarbonization. Apart from traditional H2 industrial usages, there is an increasing attention to its use in the heavy transport sector, in other energy-intensive industries, and in heating applications. Green H2 production is planned to be based on renewable electricity generation and its production at an industrial scale may have a significant impact on the electricity markets. This research assesses the electricity cost of producing H2 and its impact on the Iberian electricity market. Different evolution scenarios including a partially flexible H2 demand, based on the Spanish and Portuguese energy and climate plans, have been considered for this assessment.

关键词： Sensitivity Green products Hydrogen Europe Transportation Production Low-carbon economy

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Low cost underwater acoustic positioning system with a simplified DoA algorithm

Low cost underwater acoustic positioning system with a simpl...

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2019 OCEANS MTS/IEEE Seattle, OCEANS 2019

作者： Guedes, Pedro Viana, Nuno Silva, Jose Amaral, Guilherme Ferreira, Hugo Dias, Andre Almeida, Jose Miguel Martins, Alfredo Silva, Eduardo ISEP School of Engineering Polythecnhic Institute of Porto Porto Portugal INESC TEC - Institute for Systems and Computer Engineering Technology and Science Porto Portugal

ISBN: (纸本)9780578576183

For the context of a mobile tracking system, an underwater acoustic positioning system was developed, using three hydrophones to compute the direction of an acoustic source relative to an Autonomous Surface Vehicle (ASV). The paper presents an algorithm for the Direction of Arrival (DoA) of an acoustic source, which allows to estimate its position. Preliminary results will be shown in this paper relative to the detection and identification (ID) of the acoustic sources, as well as an analysis of the proposed algorithm. The solution allows the position estimation of an acoustic source, which can be used in tracking solutions. The system can be applied in an ASV or fixed buoys, as long as the baseline's hydrophones are at equal angular distances. The main objective is to track targets with the DoA algorithm as well to estimate their position, improving what was done in [1]. © 2019 Marine technology Society.

关键词： Underwater acoustics

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Simulating spatiotemporal energy technology adoption patterns under different policy designs

Simulating spatiotemporal energy technology adoption pattern...

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Power tech Conference

作者： Fabian Heymann Pablo Duenas Filipe Joel Soares Vladimiro Miranda Martin Rüdisüli Faculty of Engineering University of Porto Porto Portugal Massachussetts Institute of Technology MIT Energy Initiative Cambridge MA USA CPES INESC TEC Porto Portugal CPES/ Faculty of Engineering INESC TEC/ University of Porto Porto Portugal Urban Energy Systems Lab Swiss Federal Laboratories for Materials Science and Technology (Empa) Dübendorf Switzerland

Recent studies found that the adoption of distributed energy resources (DER) tends to cluster spatially and temporally which has significant implications for distribution network planning. Currently, residential DER adoption is mostly driven by public support schemes, also called incentive designs. Therefore, changes in those incentive designs will result in alternative spatiotemporal DER adoption patterns that affect distribution networks differently. Consequently, distribution network operators urgently need to understand the effects of energy policy changes on the spatial distribution of DER to guide network expansion based on realistic scenarios. The presented work and tool allow network operators to plan network expansion with robustness under future incentive design changes.

关键词： Graphical models Substations Tariffs Distribution networks Tools Robustness Spatiotemporal phenomena

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Individual’s Neutral Emotional Expression Tracking for Physical Exercise Monitoring 22nd

Individual’s Neutral Emotional Expression Tracking for Phys...

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22nd International Conference on Human computer Interaction,HCII 2020

作者： Khanal, Salik Ram Sampaio, Jaime Barroso, João Filipe, Vitor Universidade de Trás-os-Montes e Alto Douro Vila Real Portugal Institute for Systems and Computer Engineering Technology and Science INESC TEC Porto Portugal Research Center in Sports Sciences Health Sciences and Human Development CIDESD Vila Real Portugal

ISBN: (纸本)9783030601164

Facial expression analysis is a widespread technology applied in various research areas, including sports science. In the last few decades, facial expression analysis has become a key technology for monitoring physical exercise. In this paper, a deep neural network is proposed to recognize seven basic emotions and their corresponding probability values (scores). The score of the neutral emotion was tracked throughout the exercise and related with heart rate and power generation by a stationary bicycle. It was found that in a certain power range, a participant changes his/her expression drastically. Twelve university students participated in the sub-maximal physical exercise in stationary bicycles. A facial video, heart rate,and power generation were recorded throughout the exercise. All the experiments, including the facial expression analysis, were carried out offline. The score of the neutral emotion and its derivative was plotted against maxHR% and maxPower%. The threshold point was determined by calculating the local minima, with the threshold power for all the participants being within 80% to 90% of its maximum value. From the results, it is concluded that the facial expression was different from one individual to another, but it was more consistant with power generation. The threshold point can be a useful cue for various purposes, such as: physiological parameter prediction and automatic load control in the exercise equipment, such as treadmill and stationary bicycle. © 2020, Springer Nature Switzerland AG.

关键词： Bicycles

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Restart: A Route Planner to Encourage the Use of Public Transport Services in a Pandemic Context

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Transportation Research Procedia 2022年 62卷 123-130页

作者： Raquel Fulgêncio Marta Campos Ferreira Diogo Abrantes Miguel Coimbra Faculdade de Ciências da Universidade do Porto Rua do Campo Alegre s/n 4169-007 Porto Portugal Faculdade de Engenharia da Universidade do Porto R. Dr. Roberto Frias s/n 4200-465 Porto Portugal INESC TEC - Institute for Systems and Computer Engineering Technology and Science R. Dr. Roberto Frias s/n 4200-465 Porto Portugal

Public transport services play an important role in the mobility of the population in urban centers, allowing a decrease in the number of private vehicles in circulation and contributing to a more sustainable mobility. However, the emergence of the COVID-19 pandemic had a serious impact on the mobility habits of the population, with a substantial reduction in the number of public transport passengers due to the fear of contagion, which raises questions about the future sustainability of cities. Thus, it is essential to restore the confidence of travelers to feel safe and comfortable using public transport services. Taking advantage of the widespread use of mobile technologies, this article intends to propose a route planning system for public transport that meets the needs of passengers in terms of safety and comfort. After a systematic review of the existing literature and a series of focus group sessions, a prototype of the system was developed, and subsequently evaluated by potential users through usability tests. The results obtained are a good indicator of the system’s functionality and ease of use. This assessment allowed us to corroborate the potential that the proposed route planning system has in promoting the use of public transport services as a means of mobility.

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Interactive segmentation via deep learning and B-spline explicit active surfaces

arXiv

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arXiv 2021年

作者： Williams, Helena Pedrosa, João Cattani, Laura Housmans, Susanne Vercauteren, Tom Deprest, Jan D'hooge, Jan Department of Obstetrics and Gynaecology University Hospitals Leuven Belgium INESC TEC - Institute for Systems and Computer Engineering Technology and Science Porto Portugal School of Biomedical Engineering & Imaging Sciences King’s College London United Kingdom Department of Cardiovascular Sciences KU Leuven Belgium

Automatic medical image segmentation via convolutional neural networks (CNNs) has shown promising results. However, they may not always be robust enough for clinical use. Sub-optimal segmentation would require clinician’s to manually delineate the target object, causing frustration. To address this problem, a novel interactive CNN-based segmentation framework is proposed in this work. The aim is to represent the CNN segmentation contour as B-splines by utilising B-spline explicit active surfaces (BEAS). The interactive element of the framework allows the user to precisely edit the contour in real-time, and by utilising BEAS it ensures the final contour is smooth and anatomically plausible. This framework was applied to the task of 2D segmentation of the levator hiatus from 2D ultrasound (US) images, and compared to the current clinical tools used in pelvic floor disorder clinic (4DView, GE Healthcare;Zipf, Austria). Experimental results show that: 1) the proposed framework is more robust than current state-of-the-art CNNs;2) the perceived workload calculated via the NASA-TLX index was reduced more than half for the proposed approach in comparison to current clinical tools;and 3) the proposed tool requires at least 13 seconds less user time than the clinical tools, which was significant (p=0.001). © 2021, CC BY-NC-ND.

关键词： Interpolation

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Digital Nomads during the COVID-19 Pandemic: Evidence from Narratives on Reddit discussions

Digital Nomads during the COVID-19 Pandemic: Evidence from N...

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International Conference on computer Supported Cooperative Work in Design

作者： Marcos Antonio De Almeida Antó nio Correia Jano Moreira De Souza Daniel Schneider Systems Engineering and Computer Science Program (PESC/COPPE/UFRJ) Rio de Janeiro Brazil INESC TEC and University of Tr&#x00E1 s-os-Montes e Alto Douro Vila Real Portugal Postgraduate Program in Informatics PPGI/UFRJ Rio de Janeiro Brazil NCE/UFRJ T&#x00E9 rcio Pacitti Institute of Computer Applications and Research Rio de Janeiro Brazil

In this paper, we report on new findings about the results of an empirical study which aims to investigate how the COVID-19 pandemic has been shaping nomadic work practices and also challenging the lifestyles of digital nomads (DN). To do this, we collected textual data from posts in a Reddit community. We argue that, in order to understand how to design technical solutions for the so-called ‘new normal’ working conditions, one way to approach this is to understand how digital nomads are being impacted in their work practices and routines, and also how they are seeing the future of their technology-mediated work-life space. Finally, we show how evidence collected from DNs about their experiences and difficulties perceived during the pandemic period can inform CSCW researchers worldwide about future design-oriented strands.

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Reproducibility Of Epicardial Adipose Tissue In Non-Contrast CT Images: Manual Vs Semi-Automatic Segmentation

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Journal of Cardiovascular Computed Tomography 2023年第1期17卷 S4-S4页

作者： F. Sousa-Nunes C. Santos J. Pedrosa J. Mancio R. Fontes-Carvalho Centro Hospitalar de Vila Nova de Gaia / Espinho Gaia Portugal Faculty of Medicine of the University of Porto Porto Portugal Institute for Systems and Computer Engineering Technology and Science (INESC TEC) Porto Portugal

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Radiomics Epicardial Adipose Tissue In Non-contrast CT Correlates With Pro-Atherosclerotic Proteomics And Detects Coronary Artery Disease Beyond Coronary Calcium Score

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Journal of Cardiovascular Computed Tomography 2023年第1期17卷 S9-S10页

作者： Sousa-Nunes, F. Santos, C. Pedrosa, J. Mancio, J. Fontes-Carvalho, R. Centro Hospitalar de Vila Nova de Gaia / Espinho Gaia Portugal Faculty of Medicine of the University of Porto Porto Portugal Institute for Systems and Computer Engineering Technology and Science (INESC TEC) Porto Portugal

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Strongly coupled plasmonic systems on optical fiber sensors: A study on nanomaterial properties 5

Strongly coupled plasmonic systems on optical fiber sensors:...

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5th International Conference on Applications of Optics and Photonics, AOP 2022

作者： Dos Santos, Paulo S. S. Mendes, João Dias, B. Pastoriza-Santos, I. De Almeida, J.M.M.M. Coelho, Luís C. C. INESC TEC - Institute for Systems and Computer Engineering Technology and Science Rua Dr. Alberto Frias Porto4200-465 Portugal FEUP University of Porto R. Dr. Roberto Frias Porto4200-465 Portugal FCUP University of Porto Rua do Campo Alegre Porto4169-007 Portugal CIQUP - Chemistry Research Unit FCUP Univ. of Porto Porto4169-007 Portugal CINBIO Univ. de Vigo Campus Univ. Lagoas Marcosende Vigo36310 Spain SERGAS-UVIGO Galicia sur Health Research Institute Vigo36312 Spain Dep. of Physics Univ. of Trás-os-Montes e Alto Douro Vila Real5001-801 Portugal

New paths to increase the sensing performance of plasmonic sensors have been reported in recent years. There are several methodologies to achieve such purpose, namely by optimizing the nanostructure, nanomaterial and even the sensing platform. Recently the use nanoparticles over plasmonic thin films have been reported and shown sensitivity enhancement, when compared to a bare thin film. Nevertheless, a nanomaterial combination between NP and thin film has not been studied. In this work it was studied such plasmonic materials in order to optimize not only refractometric sensitivity but also decrease the resultant plasmonic band width. It was found that for Au, Ag and Cu thin films, the deposition of plasmonic nanoparticles resulted in an overall refractometric sensitivity and figure of merit (FOM) increase. The larger FOM increase was obtained for the Ag thin film, from 42 to 162 when coupled to Si nanoparticles. The greater sensitivity increase was achieved for a Cu thin film coupled to a Si nanoparticle, with an increase from 1745 to 3230 nm/RIU. © Published under licence by IOP Publishing Ltd.

关键词： Plasmonics

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