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International Conference on Computational science and its Applications (ICCSA)

作者： Tiago Castro J.C. Silva Marisa Pinheiro School of Technology Polytechnic Institute of Cávado and Ave Barcelos Portugal INESC TEC Institute for Systems and Computer Engineering Porto Portugal

ISBN: (纸本)9781665458443

This paper aims to describe an approach to help blind people getting more accessibility when performing common tasks such as using public transport or going shopping. The main objective is to aid blind people when they are disoriented and without having minimally viable alternatives to ask for help in useful time. The design of a mobile application will be described focusing the advantages of using an app by blind people to request face-to-face help from a volunteer. Using a telephone contact, audio, video and sharing coordinates, volunteer in the same geographic area can be automatically asked to help blind people.

关键词： Scientific computing Focusing Blindness Telephone sets Mobile applications Task analysis Audio-visual systems

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Satellite-based InSAR Geodesy and Collocation with GNSS

Satellite-based InSAR Geodesy and Collocation with GNSS

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2023 International Conference on ENTERprise Information systems, CENTERIS 2023 - International Conference on Project MANagement, ProjMAN 2023 - International Conference on Health and Social Care Information systems and technologies, HCist 2023

作者： Papco, Juraj Bakon, Matus Kubica, Lukas Belicova, Gabika Droscak, Branislav Ferianc, Martin Rovnak, Martin Ruiz, Antonio M. Sousa, Joaquim J. Department of Theoretical Geodesy and Geoinformatics Faculty of Civil Engineering Slovak University of Technology in Bratislava Radlinskeho 11 Bratislava813 62 Slovakia Insar.sk Ltd Konstantinova 3 Presov080 01 Slovakia Department of Finance Accounting and Mathematical Methods Faculty of Management and Business University of Presov Konstantinova 16 Presov080 01 Slovakia Department of Engineering School of Sciences and Technology Universidade de Tras-os-Montes e Alto Douro Quinta de Prados Vila Real5000-801 Portugal Geodetic and Cartographic Institute Bratislava Chlumeckeho 4 Bratislava827 45 Slovakia Department of Cartographic Geodetic and Photogrammetry Engineering University of Jaen Campus Las Lagunillas s/n Jaen23071 Spain University of Jaen Campus Las Lagunillas s/n Jaen23071 Spain Research Group RNM-282 Microgeodesia Jaen University of Jaen Campus Las Lagunillas s/n Jaen23071 Spain Institute for Systems and Computer Engineering Technology and Science INESC-TEC Porto4200-465 Portugal

Satellite radar interferometry (InSAR) enables large-scale monitoring of displacement with precision akin to ground-based methods. Using measurements from Sentinel-1 satellites, persistent scatterer networks cover areas up to hundreds of kilometers in size. One of the current challenges for the InSAR community is to tie these networks into a current and country-specific global terrestrial reference system through collocation with other geodetic techniques, especially Global Navigation Satellite systems (GNSS). In this work, an optimal procedure for assessing a suitable collocation properties for InSAR and GNSS techniques is discussed, along with the proposal for the methodology to determine the spatial relationship between the reference points of both techniques. The study analyzes three collocation stations in Slovakia using their radar backscattering characteristics. InSAR achieves an intrinsic accuracy of up to 1 mm but has uncertainties several orders of magnitude larger in 3D space. A collocation of InSAR measurements with GNSS can tie relative InSAR displacement estimates to an absolute reference frame. © 2024 The Author(s). Published by Elsevier B.V.

关键词： Geodesy

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Open-innovation practices: Diversity in portuguese smes

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Journal of Open Innovation: technology, Market, and Complexity 2021年第3期7卷 169页

作者： Almeida, Fernando Institute for Systems and Computer Engineering Technology and Science (INESC TEC) Polytechnic Institute of Gaya (ISPGAYA) University of Porto Porto 4000-008 Portugal

This study aimed to explore the diversity of open-innovation practices that are adopted in Portuguese SMEs considering the outside-in, inside-out, and coupled paradigms. A quantitative study was carried out considering a sample of 187 Portuguese SMEs. The findings revealed that these organizations favored the adoption of the outside-in paradigm. The inside-out model was the least relevant, especially for smaller companies (i.e., small and micro-companies). The most adopted outside-in practices were the integration of external knowledge from suppliers and clients;in the inside-out model, licensing processes were more important;while in the coupled model, joint ventures and network consortiums stood out. The increase in the innovation capacity of these organizations was highlighted as the most relevant benefit, while the lack of resources and difficulties in integrating knowledge emerged as challenges. This study is especially relevant for the establishment of public-support policies that promote the involvement of Portuguese SMEs in open-innovation processes. © 2021 by the author. Licensee MDPI, Basel, Switzerland.

关键词： Coupled model External knowledge Inside-out model Open innovation Openness Outside-in model

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The impact of ground control points for the 3D study of grapevines in steep slope vineyards

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Procedia computer science 2024年 239卷 2301-2307页

作者： Oiliam Stolarski José Martinho Lourenço Emanuel Peres Raul Morais Joaquim J. Sousa Luís Pádua Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB) University of Trás-os-Montes e Alto Douro (UTAD) 5000-801 Vila Real Portugal Departamento de Geologia e Pólo do Centro de Geociências (CGeo) UTAD 5000-801 Vila Real Portugal Engineering Department School of Science and Technology UTAD 5000-801 Vila Real Portugal Institute for Innovation Capacity Building and Sustainability of Agri-Food Production UTAD 5000-801 Vila Real Portugal Centre for Robotics in Industry and Intelligent Systems (CRIIS) INESC Technology and Science (INESC-TEC) 4200-465 Porto Portugal

Data acquisition through unmanned aerial vehicles (UAVs) has become integral to the study of agricultural crops, especially for multitemporal analyses spanning the entire growing season. Ensuring accurate data alignment is essential not only to maintain data quality but also to leverage the continuous monitoring of the same area over time. Ground control points (GCPs) play a critical role in geolocating UAV data. Their absence can lead to planimetric and altimetric discrepancies, which are particularly impactful in 3D plant-level studies. This study is centered on the examination of misalignment effects in a challenging steep slope vineyard environment and their impacts on 3D alignment accuracy. For this purpose, a UAV equipped with an RGB camera to capture imagery at two distinct flight heights. Various scenarios, each involving a different number of GCPs, were assessed to evaluate their impact on alignment precision. The methodology employed holds potential for assessing geolocation accuracy in complex 3D environments, providing value insights for vineyard monitoring.

关键词： unmanned aerial vehicles photogrammetric processing point clouds geolocation precision viticulture

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Post-Covid-19 Digital Nomadism: Beyond Work from (Almost) Anywhere

Post-Covid-19 Digital Nomadism: Beyond Work from (Almost) An...

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IEEE International Conference on systems, Man and Cybernetics

作者： Marcos Antonio De Almeida Jano Moreira De Souza António Correia Daniel Schneider Systems Engineering and Computer Science Program (PESCICOPPE/UFRJ) Rio de Janeiro Brazil INESC TEC and University of Tras-os-Montes e Alto Douro Vila Real Portugal College of Information Science & Technology University of Nebraska Omaha USA Postgraduate Program in Informatics PPGI/UFRJ Rio de Janeiro Brazil Tércio Pacitti Institute of Computer Applications and Research NCE/UFRJ Rio de Janeiro Brazil

In this paper, we continue our investigations on digital nomadism and the impact of COVID-19 pandemic on the work-related aspects and lifestyle of digital nomads (DN). The findings presented in this empirical study reflect the analysis of the impact of COVID-19 outbreak (and its waves) on the market economy and work-life boundaries of DNs as perceived from posts and comments gathered from a Reddit community during the period of early March 2020 until the end of 2022. From this point, our results indicate that the massification of remote work among formal workers in response to COVID-19 pandemic has impacted both the formal labor market and the DN ecosystem. As a consequence, we argue that digital nomadism tends to play a critical role beyond work from (almost) anywhere (WFA) in a post-COVID-19 era taking into account the novel facets of nomadic work-lifestyle.

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“Is It Future or Is It Past?”: From Self-contained Microtasks to AI-driven Collaborative Crowdsourcing

“Is It Future or Is It Past?”: From Self-contained Microta...

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Human-computer Interaction, Optimization and Robotic Applications (HORA), International Congress on

作者： Daniel Schneider Marcos Antonio De Almeida Ramon Chaves Benjamim Fonseca Hesam Mohseni António Correia Postgraduate Program in Informatics (PPGI) Federal University of Rio de Janeiro Rio de Janeiro Brazil Systems Engineering and Computer Science Program Federal University of Rio de Janeiro Rio de Janeiro Brazil INESC TEC and University of Trás-os-Montes e Alto Douro Vila Real Portugal Faculty of Information Technology University of Jyväskylä Jyväskylä Finland

ISBN: (数字)9798331510886

ISBN: (纸本)9798331510893

Interest in artificial intelligence (AI)-driven crowd work has increased during the last few years as a line of inquiry that expands upon prior research on microtasking to represent a means of scaling up complex tasks through AI mediation. Despite the increasing attention to the macrotask phenomenon in crowdsourcing, there is a need to understand the processes, elements, and constraints underlying the infrastructural and behavioral aspects in such form of crowd work when involving collaboration. To this end, this paper provides a first attempt to characterize some of the research conducted in this direction to identify important paths for an agenda comprising key drivers, challenges, and prospects for integrating human-centered AI in collaborative crowdsourcing environments.

关键词： Crowdsourcing Human computer interaction Collaboration Artificial intelligence Mediation Robots Optimization

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Power-to-Peer: a blockchain P2P post-delivery bilateral local energy market

Power-to-Peer: a blockchain P2P post-delivery bilateral loca...

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International Conference on European Electricity Market, EEM

作者： João Mello José Villar Ricardo Jorge Bessa Mário Lopes João Martins Miguel Pinto INESC TEC - Institute for Systems and Computer Engineering Technology and Science Porto Portugal

ISBN: (数字)9781728169194

ISBN: (纸本)9781728169200

This paper proposes a Local Energy Market using a P2P blockchain-powered marketplace where agents bilaterally trade energy after the consumption and production period, and not before, as usual in electricity market design. The EU and MIBEL regulatory framework for Renewable Energy Communities potentially creates space for such a market, but some improvements in the settlement procedures and agent's participation must be met.

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Local Energy Markets for Energy Communities with Grid Constraints

Local Energy Markets for Energy Communities with Grid Constr...

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International Conference on European Electricity Market, EEM

作者： Rogério Rocha José Villar Collado Tiago Soares Fábio Retorta Technology and Science INESC TEC - Institute for Systems and Computer Engineering Porto Portugal

ISBN: (数字)9781728169194

ISBN: (纸本)9781728169200

Renewable energy communities (REC) and local energy markets (LEM) emerge as entities capable, not only to promote the penetration of renewable energy sources into lower levels of the grid, but also to manage distributed energy resources (DER) and local energy exchanges between small players. This paper proposes a benefit assessment among different regulatory frameworks for LEM, considering network constraints and a virtual storage unit. Results show significant savings can be achieved, even without storage. Therefore, the continuous increase of DER can have considerable grid impacts if not complemented by other structures as storage or by alternative market services like flexibility.

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Scalable and Cost-Effective All-Chemical Production of Stable Gold-Coated Silver Thin-Films for High-Performance Plasmonic Optical Fiber Sensors 28

Scalable and Cost-Effective All-Chemical Production of Stabl...

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28th International Conference on Optical Fiber Sensors, OFS 2023

作者： dos Santos, Paulo S.S. Mendes, João P. Pastoriza-Santos, I. de Almeida, José M.M.M. Coelho, Luís C.C. INESC TEC - Institute of Systems and Computer Engineering Technology and Science Department of Physics Faculty of Sciences University of Porto Rua do Campo Alegre Porto4169-007 Portugal FEUP - Faculty of Engeneering of Unversity of Porto R. Dr. Roberto Frias Porto4200-465 Portugal CINBIO - Center of Research in Nanomaterials and Biomedicine Campus Universitario Lagoas Universidad de Vigo Marcosende Pontevedra Vigo36310 Spain SERGAS-UVIGO - Galicia Health Service Pontevedra Vigo36312 Spain UTAD Department of Physics University of Trás-os-Montes e Alto Douro Vila Real5001-801 Portugal

Long-term stability and high scalability are significant issues in plasmonic optical fiber sensors. This work presents a highly scalable and low-cost all-chemical approach for production of gold-coated silver thin-fil... 详细信息

ISBN: (纸本)9781957171302

关键词： Cost effectiveness

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MonoVisual3DFilter: 3D tomatoes' localisation with monocular cameras using histogram filters

arXiv

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arXiv 2023年

作者： Magalhães, Sandro Costa dos Santos, Filipe Neves Moreira, António Paulo Dias, Jorge Faculty of Engineering University of Porto Porto Portugal INESC TEC Instituto de Engenharia de Sistemas e Computadores Tecnologia e Ciência Porto Portugal Institute of Systems and Robotics Department of Electrical Engineering and Computers University of Coimbra Coimbra Portugal Khalifa University of Science Technology and Research Abu Dhabi United Arab Emirates

Performing tasks in agriculture, such as fruit monitoring or harvesting, requires perceiving the objects' spatial position. RGB-D cameras are limited under open-field environments due to lightning interferences. So, in this study, we state to answer the research question: "How can we use and control monocular sensors to perceive objects' position in the 3D task space?" Towards this aim, we approached histogram filters (Bayesian discrete filters) to estimate the position of tomatoes in the tomato plant through the algorithm MonoVisual3DFilter. Two kernel filters were studied: the square kernel and the Gaussian kernel. The implemented algorithm was essayed in simulation, with and without Gaussian noise and random noise, and in a testbed at laboratory conditions. The algorithm reported a mean absolute error lower than 10 mm in simulation and 20 mm in the testbed at laboratory conditions with an assessing distance of about 0.5 m. So, the results are viable for real environments and should be improved at closer distances. © 2023, CC BY-NC-ND.

关键词： Fruits

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