Sapientia
Repositório Científico da UAlg
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Use of the spatial economic benefit analysis (SEBA) for marine spatial planning: a case including offshore wind energy and fisheries in France
Publication . Pawar, Lokesh; Le Gallic, Bertrand; Ramos, Jorge
Marine Spatial Planning (MSP) is a key instrument for sustainable ocean governance in Europe, yet the spatial distribution of socioeconomic benefits and trade-offs remains poorly documented. This study applies and extends the Spatial Economic Benefit Analysis (SEBA) framework to offshore wind energy and capture fisheries in France, with a focus on the North Atlantic–Western Channel (NAMO) façade. Three extensions are introduced relative to earlier single-sector, single-scale SEBA applications: simultaneous dual-sector comparison, nesting of project-level firm mapping within regional analysis, and delivery through an open, updatable visualization platform that allows planners to re-run the analysis as registries are updated. Twelve indicator families were selected against four explicit criteria (relevance to a SEBA step, spatial attributability, traceability to a planning instrument, and public availability) and cross-validated against independent registries. Offshore wind employment is more unevenly distributed across regions than fishery revenue (Gini 0.59 versus 0.42), and firm presence is a weak proxy for employment: Brittany hosts 26.6% of mapped offshore wind firms but only 6.5% of sectoral full-time equivalents (2.1 FTE per firm), whereas Île-de-France hosts 4.8% of firms and 19.6% of employment (34.6 FTE per firm). Fishery revenue and offshore wind firm counts are positively rank-correlated across coastal regions (Spearman ρ = 0.90, n = 5, p = 0.037), indicating co-location rather than causation: offshore wind constitutes an additional spatial pressure on a sector already contracting (−9.5% employment 2012–2022; −29% vessels 2000–2023). Uncertainty was addressed through a three-tier data confidence classification and sensitivity testing; concentration rankings were robust to extreme reassignments of multi-role firms (ΔGini ≤ 0.06). The analysis is deliberately restricted to the distribution of economic benefits and does not assess ecological impacts, which must be integrated before SEBA outputs inform zoning. Outputs are directly interpretable for façade plan revision, tender local content scoring, and compensation design, and the workflow is transferable to any jurisdiction with public corporate registries and landings statistics.
Narrative portals and augmented reality: activating empathy in creative projects
Publication . Gouveia, Ana Raquel; Carvalho, Isabel Cristina; Maldonado, Paulo
In an era marked by the increasing fragmentation of human relationships – where mechanisms of social and emotional connection often struggle to adapt to the acceleration of communicational technologies and digital ecosystems – Digital Media Art assumes a role of critical and sensitive mediation. The experimental and researchdriven exploration of ways to reconfigure modes of being-withothers through technology fosters intersections between creative practices and other means, such as digital narrative and augmented reality, particularly given their immersive and interactive potential oriented toward ethical, social, and cultural concerns. These practices propose frameworks for listening, sharing and symbolic co-presence, where empathy is not conceived as a passive emotion, but as a relational process. This article offers a theoretical reflection on such frameworks, focusing on narrative portals activated through augmented reality, and analyses four contemporary international art projects (2021-2025) - Como Semillas en el Viento, Monumental Perspectives, Las Awichas and Augmented Landscapes of Empathy – which integrate technology and storytelling to cultivate affective and community-based connections. Through comparative analysis, this article aims to understand how these creative projects are situated within the field of Digital Media Art and how they configure spaces of relation and collective memory.
Piecewise rational affine maps, multidimensional generalized shifts, and computation over the real numbers
Publication . Graça, Daniel
In this paper we study the computational power of certain classes of dynamical systems defined by the iteration of piecewise rational affine maps on the compact set [0,1]^n as a model of computation over the real numbers. To achieve this aim we use symbolic dynamics to study the dynamics of this class of piecewise rational affine maps and in the process introduce multidimensional generalized shifts, which are an extension of the generalized shift of Moore to higher dimensional spaces. We show that multidimensional generalized shifts are not equivalent (conjugate) to (one-dimensional) generalized shifts. We then establish that computable analysis, which allows to extend computability based on Turing machines to real numbers, is computationally equivalent to multidimensional generalized shifts, both at a computability and at a computational complexity (polynomial time) level. This implies that a certain class of dynamical systems defined by the iteration of rational piecewise affine maps on the unit ball can thus compute any function computable over the real numbers in the computable analysis sense. These results highlight that several distinct models of computation over the real numbers, such as computable analysis, Claude Shannon's General Purpose Analog Computer, certain classes of piecewise rational affine maps, and the generalized shift, are all computationally equivalent.
“UrdiSynth42” e a tecelagem figital
Publication . Ribeiro Caldeira, Nelson Francisco; Veiga, Pedro Alves; Cordeiro, João
This study examines the contemporary challenge of digital art in preserving cultural authenticity while balancing technological innovation with historical continuity. It posits that virtualization, understood as shifts in identity towards expressive potentials, is a longstanding cultural phenomenon that predates the digital era. By employing the Portalegre Tapestries as a paradigmatic case, this research identifies five historical dimensions of transcoding, dimensional, material, technical, temporal, and interpretative; that foreshadow methodologies in contemporary digital art. The concept of phygital art is introduced, establishing a hybrid temporal grammar that merges the rhythms of online and offline environments. Within this framework, the ”UrdiSynth42” model proposes a hierarchical four-layer architecture (Perception, Cognition, Expression, Coordination), which operationalizes historical virtualization through computer vision, machine learning, and generative synthesis. The strategic application of technologies such as Docker ensures both digital and cultural preservation. This study concludes that historical virtualization does not signify a technological rupture but rather a natural evolution, offering a robust foundation for future artistic practices that honor cultural traditions while exploring new technological possibilities.
Global research trends on coastal dunes: implications for a semi-arid coast in Northeastern Brazil
Publication . Nova, Raquel Arcoverde Vila; Gonçalves, Rodrigo Mikosz; Costas, Susana; Galiforni-Silva, Filipe; Ponsoni, Leandro; Sousa, Paulo Henrique Gomes de Oliveira
This study aimed to evaluate and quantify the environmental impacts generated by anthropogenic actions on coastal dunes globally using bibliometric data, while concurrently identifying human impacts in a local context on the Brazilian semi-arid coast. A systematic review identified 897 relevant publications from a final sample of 1838 works, revealing an increasing trend in global research, peaking in 2018. Geographically, the United States (141), Italy (95), and Spain (79) lead the field, with Brazil contributing 46 publications. The global overview highlights urbanization (217 studies) and tourism (193 studies) as the most frequent impact factors, contrasting with common mitigation measures like dune stabilization with vegetation (112 studies) and beach nourishment (74 studies). Critically, 11 studies reported that management actions, particularly stabilization without considering native flora, led to problems with invasive plants. A significant research gap was identified due to the absence of literature on wind farms, typically located in transgressive dune systems. The local case study in Ceará state confirms dynamics consistent with global trends, where intense exploitation results in management failures; quantitative temporal analysis (2015–2023) demonstrated a dramatic 86.76% loss of dune area in Fortim and a 4.24 km2 loss in Jijoca de Jericoacoara. Findings suggest that, in the Ceará case study, restricting access, promoting community participation, and relocating infrastructure to more appropriate areas may help mitigate human impacts. In addition to identifying potential research gaps, this integration of global and local analysis approaches can contribute to evidence-based coastal dune management adapted to local conditions.