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Publications

2022

Políticas culturais, indicadores e Comunicação Pública

Authors
Martins, TC; Pinto, MMGdA; Silva, AMBMd;

Publication
Redes

Abstract
A proposta do estudo é problematizar a produção e comunicação de informação pública e a configuração de indicadores culturais com vista ao desenvolvimento de instrumentos e novos formatos de disponibilização e interação nas práticas governamentais. O paper procura articular os conceitos de política cultural, indicadores culturais e Comunicação Pública e apresentar uma proposta de modelo interpretativo para a configuração de indicadores culturais a partir de um case study em Portugal. Conclusivamente, o estudo aponta que, através de práticas de Comunicação Pública, os indicadores são (i) reconhecidos enquanto ato comunicacional que (ii) potencializam as ferramentas de transparência e de prestação de contas sobre as práticas dos entes governamentais.

2022

Status Update on the Development of METIS, the Mid-Infrared ELT Imager and Spectrograph

Authors
Brandl, BR; Bettonvila, F; van Boekeld, R; Glauser, A; Quanz, SP; Absil, O; Feldt, M; Garcia, PJV; Glasse, A; Guedel, M; Labadie, L; Meyer, M; Pantin, E; Wang, SY; van Winckel, H; Agocs, T; Amorim, A; Bertram, T; Burtscher, L; Delacroix, C; Laun, W; Lesman, D; Raskin, G; Salo, C; Scheithauer, S; Stuik, R; Todd, S; Haupt, C; Siebenmorgen, R;

Publication
GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IX

Abstract
The Mid-Infrared ELT Imager and Spectrograph (METIS) is one of the first generation science instruments on ESO's 39m Extremely Large Telescope (ELT). METIS will provide diffraction-limited imaging and medium resolution slit-spectroscopy from 3 - 13 microns (L, M, and N bands), as well as high resolution (R similar to 100,000) integral field spectroscopy from 2.9 - 5.3 microns. Both imaging and IFU spectroscopy can be combined with coronagraphic techniques. After passing its preliminary design review (PDR) in May 2019, and the final design review (FDR) of its optical system in June 2021, METIS is now preparing for the FDR of its entire system in the fall of 2022, while the procurements of many optical components have already started. First light at the telescope is expected in 2028, after a comprehensive assembly integration and test phase. In this paper we focus mainly on the various design aspects, and present a status update on the final optical and mechanical design of METIS. We describe the conceptual setup of METIS, its key functional components, and the resulting observing modes. Last but not least, we present the expected scientific performance, in terms of sensitivity, adaptive optics, and high contrast imaging performance.

2022

Bi-Level Decomposition Approach for Coordinated Planning of an Energy Hub With Gas-Electricity Integrated Systems

Authors
Ghasemi, H; Aghaei, J; Gharehpetian, GB; Shafie Khah, M; Catalao, JPS;

Publication
IEEE SYSTEMS JOURNAL

Abstract
Integration of multiple energy systems and the presence of smart energy hubs have provided increased flexibility and improved efficiency for the system. In this article, a bi-level decomposition approach (BLDA) is presented for coplanning of electricity and gas networks as well as the energy hub in distribution networks. The proposed multistage planning determines the investment candidates with optimum capacity for the components of integrated systems. Due to the complexity and nonlinearity of the models and energy subsystems interactions, the expansion planning problem is a difficult task with many limitations, especially for large-scale systems. To overcome these obstacles, achieve an optimum response and reduce computation time, a mixed integer linear programming model and a new BLDA methodology are developed in this article. Moreover, to evaluate the effectiveness and superiority of the proposed approach, the interactions among the energy systems are simulated in a large-scale distribution system and the results are compared.

2022

The Impact of Corporate Social Responsibility and Innovative Strategies on Financial Performance

Authors
Costa, J; Fonseca, JP;

Publication
RISKS

Abstract
The article aims to appraise the role of Corporate Social Responsibility (CSR) and innovation strategies as leverages of a company's financial performance. The theoretical and empirical statement of this link aims to reinforce the importance of these strategical options in both the managerial and the public policy domain. Shedding light on the economic return of these practices will help managers make better strategic decisions. Policy makers will also grasp the required evidence to encompass CSR in policy packages. To address the research question, data were collected from the Thomson Reuters Eikon Datastream covering the 1000 largest companies listed on the stock exchange worldwide. Thereafter, hierarchical linear regressions were performed to produce the econometric results. Two time frames (2015-2019) were compared to address time-space trends. Enrolling in CSR activities entails additional costs which can undermine the company's financial performance if not properly supported by public policies. Combining CSR and innovation appears to be the best strategy for companies seeking improvements in their financial performance while being socially responsible. The contribution of this study is threefold: first, the analysis covers the largest thousand firms in operation worldwide; secondly, the econometric results demonstrate that combining CSR with innovation positively impacts financial performance; and lastly, the time comparison evidences a positive but slow evolution in CSR adoption. The article provides an applied perspective, of use both for managers and policy makers, as to how they should approach and disseminate involvement in these types of activities.

2022

Analysis of classification tradeoff in deep learning for gastric cancer detection

Authors
Lima, G; Coimbra, MT; Ribeiro, MD; Libânio, D; Renna, F;

Publication
EMBC

Abstract
This study aimed to build convolutional neural network (CNN) models capable of classifying upper endoscopy images, to determine the stage of infection in the development of a gastric cancer. Two different problems were covered. A first one with a smaller number of categorical classes and a lower degree of detail. A second one, consisting of a larger number of classes, corresponding to each stage of precancerous conditions in the Correa's cascade. Three public datasets were used to build the dataset that served as input for the classification tasks. The CNN models built for this study are capable of identifying the stage of precancerous conditions/lesions in the moment of an upper endoscopy. A model based on the DenseNet169 architecture achieved an average accuracy of 0.72 in discriminating among the different stages of infection. The trade-off between detail in the definition of lesion classes and classification performance has been explored. Results from the application of Grad CAMs to the trained models show that the proposed CNN architectures base their classification output on the extraction of physiologically relevant image features. Clinical relevance - This research could improve the accuracy of upper endoscopy exams, which have margin for improvement, by assisting doctors when analysing the lesions seen in patient's images.

2022

Exploring consonant frequency in Sri Lanka Portuguese

Authors
Silva, C; Trigo, L;

Publication
Proceedings of the Second Workshop on Digital Humanities and Natural Language Processing (2nd DHandNLP 2022) co-located with International Conference on the Computational Processing of Portuguese (PROPOR 2022), Virtual Event, Fortaleza, Brazil, 21st March, 2022.

Abstract
Although phoneme selection is a well-studied subject in contact linguistics, phoneme integration is mostly unexplored. This study aims at assessing phoneme integration by measuring consonant frequency in Sri Lanka Portuguese and Portuguese. For that, we select two large lexical corpora and, take several preparation steps to make the data uniform, consistent and reusable. In terms of integration, we find that the more unconstrained a consonant is concerning its phonotactic patterns, the more frequent it is. We also find that being coronal has a positive impact on integration, whereas being palatal has a negative impact. Moreover, we find that in spite of the apparently random changes in the consonant frequency, consonant classes are robustly transmitted from the lexifier to this creole. Copyright © 2022 for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 International (CC BY 4.0).

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