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Publicações

2024

Best practices, performance advantage and trade-offs: new insights from frontier analysis

Autores
Sousa, R; Camanho, AS; Silva, MC; da Silveira, GJC; Arabi, B;

Publicação
JOURNAL OF PRODUCTIVITY ANALYSIS

Abstract
There are still important theoretical and empirical gaps in understanding the role of best practices (BPs), such as quality management, lean and new product development, in generating firm's performance advantage and overcoming trade-offs across distinct performance dimensions. We examine these issues through the perspective of performance frontiers, integrating in novel ways the resource-based theory with the emergent practice-based view. Hypotheses on relationships between BPs, performance advantage, and trade-offs are developed and tested with stationary and longitudinal (recall) data from a global survey of manufacturing firms. We use data envelopment analysis, which overcomes limitations of mainstream methods based on central tendency. Our findings support the view that BPs may serve as a source of enduring competitive advantage, based on their ability to lead to a heterogeneous range of dominant and difficult-to-imitate competitive positions. The study provides new insights on contemporary debates about the role of BPs in generating performance advantage and how practitioners can sustain internal support and extract benefits from them.

2024

Is this news article still relevant? Ranking by contemporary relevance in archival search

Autores
Jatowt, A; Sato, M; Draxl, S; Duan, YJ; Campos, R; Yoshikawa, M;

Publicação
INTERNATIONAL JOURNAL ON DIGITAL LIBRARIES

Abstract
Our civilization creates enormous volumes of digital data, a substantial fraction of which is preserved and made publicly available for present and future usage. Additionally, historical born-analog records are progressively being digitized and incorporated into digital document repositories. While professionals often have a clear idea of what they are looking for in document archives, average users are likely to have no precise search needs when accessing available archives (e.g., through their online interfaces). Thus, if the results are to be relevant and appealing to average people, they should include engaging and recognizable material. However, state-of-the-art document archival retrieval systems essentially use the same approaches as search engines for synchronic document collections. In this article, we develop unique ranking criteria for assessing the usefulness of archived contents based on their estimated relationship with current times, which we call contemporary relevance. Contemporary relevance may be utilized to enhance access to archival document collections, increasing the likelihood that users will discover interesting or valuable material. We next present an effective strategy for estimating contemporary relevance degrees of news articles by utilizing learning to rank approach based on a variety of diverse features, and we then successfully test it on the New York Times news collection. The incorporation of the contemporary relevance computation into archival retrieval systems should enable a new search style in which search results are meant to relate to the context of searchers' times, and by this have the potential to engage the archive users. As a proof of concept, we develop and demonstrate a working prototype of a simplified ranking model that operates on the top of the Portuguese Web Archive portal (arquivo.pt).

2024

VPP Participation in the FCR Cooperation Considering Opportunity Costs

Autores
Ribeiro, FJ; Lopes, JAP; Soares, FJ; Madureira, AG;

Publicação
APPLIED SCIENCES-BASEL

Abstract
Currently, the transmission system operators (TSOs) from Portugal and Spain do not procure a frequency containment reserve (FCR) through market mechanisms. In this context, a virtual power plant (VPP) that aggregates sources, such as wind and solar power and hydrogen electrolyzers (HEs), would benefit from future participation in this ancillary service market. The methodology proposed in this paper allows for quantifying the revenues of a VPP that aggregates wind and solar power and HEs, considering the opportunity costs of these units when reserving power for FCR participation. The results were produced using real data from past FCR market sessions. Using market data from 2022, a VPP that aggregates half of the HEs and is expected to be connected in the country by 2025 will have revenues over EUR 800k, of which EUR 90k will be HEs revenues.

2024

Decentring engineering education beyond the technical dimension: ethical skills framework

Autores
Monteiro, F; Sousa, A;

Publicação
LONDON REVIEW OF EDUCATION

Abstract
Engineering plays a key role in society today, influencing social behaviour, economic systems, (un)sustainability and future construction. Faced with this central and powerful role of engineering, it is urgent to recognise the need for professionals in this area to be culturally competent and sociopolitically committed in the collective ethical construction of the common good. Engineering course curricula generally focus on technical-scientific training - as is the case in Portugal - not on including or valuing other educational dimensions (namely, social, ethical, cultural or political responsibility). However, to promote an ethically responsible and sustainable future, it is imperative that these dimensions are included in engineers' training, namely through ethical education that promotes a responsible professional practice that contributes to a viable common future. Intending to contribute to a culturally responsive engineering education, and to the development of the pedagogical dimension of the ethical education of engineering students, this study aims to develop a framework of the ethical skills necessary for the professional practice of engineering. The methodology used included a systematic literature review and document analysis. The developed framework allows systematising and interconnecting ethical skills, which can promote and facilitate the inclusion of ethical education in engineering courses. The framework helped to design a curricular module in engineering. It is a useful tool for professors of ethics in engineering, for those responsible for structuring engineering curriculum plans and for anyone responsible for enhancing this field of engineering education.

2024

Assessing the Clinical Efficacy of Virtual Reality Interventions in Post-Intensive Care Syndrome: A Systematic Review

Autores
Oliveira, I; Torneiro, A; Reis, R; Oliveira, E; Ferreira Coimbra, J; Paredes, H; Brugada Ramentol, V; Morgenstern, NA; Coelho, A; Rodrigues, NF;

Publicação

Abstract

2024

Paraconsistency for the Working Software Engineer (Extended Abstract)

Autores
Barbosa, LS;

Publicação
Software Engineering and Formal Methods - 22nd International Conference, SEFM 2024, Aveiro, Portugal, November 6-8, 2024, Proceedings

Abstract
Modelling complex information systems often entails the need for dealing with scenarios of inconsistency in which several requirements either reinforce or contradict each other. This lecture summarises recent joint work with Juliana Cunha, Alexandre Madeira and Ana Cruz on a variant of transition systems endowed with positive and negative accessibility relations, and a metric space over the lattice of truth values. Such structures are called paraconsistent transition systems, the qualifier stressing a connection to paraconsistent logic, a logic taking inconsistent information as potentially informative. A coalgebraic perspective on this family of structures is also discussed. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

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