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Publications

2022

EUNIVERSAL'S SMART GRID SOLUTIONS FOR THE COORDINATED OPERATION & PLANNING OF MV AND LV NETWORKS WITH HIGH EV INTEGRATION

Authors
Sampaio G.; Gouveia C.; Bessa R.; Villar J.; Retorta F.; Carvalho L.; Merckx C.; Benothman F.; Promel F.; Panteli M.; Mourão R.L.; Louro M.; Águas A.; Marques P.;

Publication
IET Conference Proceedings

Abstract
EUniversal project aims to facilitate the use of flexibility services and interlink distribution system's active management with electricity markets. Implementing market-based flexibility services implies a change in distribution network monitoring and control towards a more predictive approach. However, integrating cost-effective monitoring and control tools for the LV network is still quite challenging. Within the project, a set of operation and planning tools have been developed for a coordinated quantification and activation of flexibility in HV, MV and LV distribution networks. The paper presents the tools developed for the Portuguese pilot and shows preliminary results obtained when considering network operation scenarios characterized by large scale integration of DER and EV.

2022

From bone to breast cancer : a journey of unanswered questions and unexplored opportunities

Authors
Reis, Joana; Silva, Susana;

Publication

Abstract

2022

Annotating Arguments in a Corpus of Opinion Articles

Authors
Rocha, G; Trigo, L; Cardoso, HL; Sousa-Silva, R; Carvalho, P; Martins, B; Won, M;

Publication
LREC 2022: THIRTEEN INTERNATIONAL CONFERENCE ON LANGUAGE RESOURCES AND EVALUATION

Abstract
Interest in argument mining has resulted in an increasing number of argument annotated corpora. However, most focus on English texts with explicit argumentative discourse markers, such as persuasive essays or legal documents. Conversely, we report on the first extensive and consolidated Portuguese argument annotation project focused on opinion articles. We briefly describe the annotation guidelines based on a multi-layered process and analyze the manual annotations produced, highlighting the main challenges of this textual genre. We then conduct a comprehensive inter-annotator agreement analysis, including argumentative discourse units, their classes and relations, and resulting graphs. This analysis reveals that each of these aspects tackles very different kinds of challenges. We observe differences in annotator profiles, motivating our aim of producing a non-aggregated corpus containing the insights of every annotator. We note that the interpretation and identification of token-level arguments is challenging; nevertheless, tasks that focus on higher-level components of the argument structure can obtain considerable agreement. We lay down perspectives on corpus usage, exploiting its multi-faceted nature.

2022

Spectroscopic detection of pigments in tissues: correlation with tissue aging and cancer development

Authors
Oliveira, LM; Goncalves, TM; Botelho, AR; Martins, IS; Silva, HF; Carneiro, I; Carvalho, S; Henrique, R; Tuchin, VV;

Publication
2022 International Conference Laser Optics, ICLO 2022 - Proceedingss

Abstract
The direct calculation of the absorption coefficient spectra of various tissues from spectral measurements allowed to retrieve the contents of melanin and lipofuscin. In the rabbit brain cortex, 1.8 times higher melanin content is explained by the neuron degeneration process. Similar melanin and lipofuscin contents were found in the rabbit pancreas as a result of the tissue aging process. The conversion of 83 % of the melanin in the human normal kidney into lipofuscin in the cancer kidney indicates that lipofuscin can be considered a kidney cancer marker in humans. © 2022 IEEE.

2022

DISCOVERIES AT PARCÃO – A CIBRICIDADE COMO POTÊNCIA PARA O DESENVOLVIMENTO DO PENSAMENTO COMPUTACIONAL NA EDUCAÇÃO OnLIFE

Authors
Menezes, J; Schlemmer, E; Thum, AB; Hohendorff, RV;

Publication
O HABITAR DO ENSINAR E DO APRENDER: Desafios para/na/da Educação OnLIFE

Abstract

2022

L0 and L1 Guidance and Path-Following Control for Airborne Wind Energy Systems

Authors
Fernandes, MCRM; Vinha, S; Paiva, LT; Fontes, FACC;

Publication
ENERGIES

Abstract
For an efficient and reliable operation of an Airborne Wind Energy System, it is widely accepted that the kite should follow a pre-defined optimized path. In this article, we address the problem of designing a trajectory controller so that such path is closely followed. The path-following controllers investigated are based on a well-known nonlinear guidance logic termed L1 and on a proposed modification of it, which we termed L0. We have developed and implemented both L0 and L1 controllers for an AWES. The two controllers have an easy implementation with an explicit expression for the control law based on the cross-track error, on the heading angle relative to the path, and on a single parameter L (L-0 or L-1, depending on each controller) that we are able to tune. The L0 controller has an even easier implementation since the explicit control law can be used without the need to switch controllers. Since the switching of controllers might jeopardize stability, the L-0 controller has an important theoretical advantage in being able to guarantee stability on a larger domain of attraction. The simulation study shows that both nonlinear guidance logic controllers exhibit appropriate performance when the L parameter is adequately tuned, with the L0 controller showing a better performance when measured in terms of the average cross-track error.

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