Finite Sample Performance of Frequency and Time Domain Tests for Seasonal Fractional Integration

Testing the order of integration of economic and financial time series has become a conventional procedure prior to any modelling exercise. In this paper, we investigate and compare the finite sample properties of the frequency domain tests proposed by Robinson (1994) and the time domain procedure proposed by Hassler, Rodrigues and Rubia (2008) when applied to seasonal data.

Contribuição para a caracterização da recolha comercial de macrofungos comestíveis no distrito de Bragança, Portugal

Com este trabalho pretendeu-se caracterizar a actividade de recolha de cogumelos comestíveis no distrito de Bragança relativamente a espécies e quantidades, habitats, formas de recolha e transporte e valor comercial. Apurou-se que as recolhas incidem principalmente sobre Amanita caesarea, Boletus pinicola, B. edulis, B. aereus, Lactarius deliciosus, Tricholoma equestre, T. georgii, e T. portentosum. As quantidades recolhidas são geralmente inferiores a 5 kg/colector/dia observando-se no global um maior peso das recolhas superiores a 5 kg/colector/dia. As espécies são recolhidas em ecossistemas florestais de e em sistemas agro-florestais. A recolha de cogumelos não constitui a actividade principal dos colectores

Avaliação de modelos de dimensionamento para o reforço à flexão com CFRP (FIB vs ACI)

A concepção do reforço com sistemas de FRP pressupõe para a sua adequada aplicação um conhecimento rigoroso dos modelos de dimensionamento e de verificação de segurança. Este artigo tem como objectivos principais a avaliação dos métodos de cálculo expostos nas propostas normativas da FIB (Bulletin 14, 2001) e ACI (2002) para a verificação da segurança à flexão de estruturas de betão armado reforçadas com sistemas compósitos de CFRP e a avaliação da relevância de alguns parâmetros para o dimensionamento. Pretende-se avaliar se, para uma dada base de dados de ensaios experimentais, os resultados obtidos respeitam as condições de segurança em relação ao Estado limite Último (ELU) definidas nas publicações acima referidas e identificar, entre os diversos métodos propostos, os que melhor se adequam a este tipo de estruturas. Para a análise comparativa e paramétrica que é feita, recorreu-se a uma vasta gama de modelos experimentais seleccionados com base nos três critérios seguintes: a) Tipo de elemento estrutural: Laje e Viga; b) Técnica de reforço: EBR e NSM; c) Sistema de reforço: pré-fabricado (laminado ou varão) e moldado in situ (manta). Com base na informação dos resultados experimentais de todos os modelos reunidos, recorreu-se a uma folha de cálculo automático, desenvolvida pelos autores, para se determinarem os valores do momento resistente (Mt) e da deformação máxima mobilizada pelo compósito (eft), em ELU, que seriam de prever (resultados teóricos), adoptando as filosofias de cálculo sugeridas nas propostas regulamentares. Procedeu-se à verificação de segurança através da análise comparativa entre os resultados teóricos e os experimentais para os modelos de Lajes EBR, de Vigas EBR por adição de laminados, de Vigas EBR por adição de mantas e de Vigas NSM (por adição de laminados e de varões), primeiro, sobre a previsão do momento resistente e depois sobre a estimativa da deformação máxima do CFRP

Correction: Increased policy ambition is needed to avoid the effects of climate change and reach carbon removal targets in Portugal

This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http:// creat iveco mmons. org/ licen ses/ by/4. 0/.J. Pedersen, L. F. Dias, P. M. M. Soares, and F. D. Santos would like to acknowledge the financial support provided by the EEA-Financial Mechanism 2014-2021 and the Portuguese Environment Agency through Pre-defined Project-2 National Roadmap for Adaptation XXI (PDP-2), by the Portuguese Fundacao para a Ciencia e a Tecnologia (FCT) I.P./MCTES through national funds (PIDDAC) - UIDB/00329/2020 (https://doi.org/10.54499/UIDB/00329/2020), UIDB/50019/2020 (https://doi.org/10.54499/UIDB/50019/2020), UIDP/50019/2020 (https://doi.org/10.54499/UIDP/50019/2020), and LA/P/0068/2020 (https://doi.org/10.54499/LA/P/0068/2020). J. Azevedo would like to acknowledge the financial support provided by the Portuguese Fundacao para a Ciencia e a Tecnologia (FCT) I.P./MCTES through national funds (PIDDAC) - CIMO, UIDB/00690/2020 (https://doi.org/10.54499/UIDB/00690/2020), UIDP/00690/2020 (https://doi.org/10.54499/UIDP/00690/2020), and SusTEC, LA/P/0007/2020 (https://doi.org/10.54499/LA/P/0007/2020).info:eu-repo/semantics/publishedVersio

Increased policy ambition is needed to avoid the effects of climate change and reach carbon removal targets in Portugal

The Paris Agreement's goal of limiting global warming hinges on forest carbon sequestration as a key in several national strategies. However, Portugal's rising forest fire occurrences threaten its ability to meet ambitious 2030 and 2050 carbon sequestration targets. Considering fire and forest trends, this study aims to quantify whether Portugal can reach its carbon sequestration ambitions as stated in its 2030 and 2050 targets. We tested three national forest scenario extensions of the global Shared Socioeconomic Pathways (SSPs) and Shared Policy Assumptions (SPAs) based on a dynamic model, simulating forest area and carbon sequestration related to future fire risk and policies of fire management, forest management, restoration of burnt areas, and climate change adaptation. The model projects a rapidly decreasing forest area under existing Portuguese policies (PT-SSP3), a slow decline under moderate policy improvements (PT-SSP2), and an almost stable forest area under long-term sustainable policy developments (PT-SSP1). In PT-SSP3, carbon sequestration will be reduced to 60% by 2050 compared to 2015, while it declines to about 85% and 90% under PT-SSP2 and PT-SSP1, respectively. It is still plausible to reach Portugal's 2030 sequestration obligations under the EU's Paris Agreement target under all three scenarios, while the Portuguese GHG neutrality target is not reached in the presented scenarios. Our four introduced policy areas (increasing focus on fire and forest management, forest restoration, and climate change adaptation of forest stands) must be supplemented by other policy strategies, such as reforestation.J. Pedersen, L. F. Dias, P. M. M. Soares, and F.D. Santos would like to acknowledge the financial support provided by the EEA-Financial Mechanism 2014-2021 and the Portuguese Environment Agency through Pre-defined Project-2 National Roadmap for Adaptation XXI (PDP-2), by the Portuguese Fundação para a Ciência e a Tecnologia (FCT) I.P./MCTES through national funds (PIDDAC) - UIDB/00329/2020 (https:// doi. org/ 10. 54499/ UIDB/00329/ 2020), UIDB/50019/2020 (https:// doi. org/ 10.54499/ UIDB/50019/ 2020), UIDP/50019/2020 (https:// doi. org/ 10. 54499/ UIDP/50019/ 2020), and LA/P/0068/2020 (https:// doi. org/ 10. 54499/ LA/P/0068/ 2020). J. Azevedo would like to acknowledge the financial support provided by the Portuguese Fundação para a Ciência e a Tecnologia (FCT) I.P./MCTES through national funds (PIDDAC) - CIMO, UIDB/00690/2020 (https:// doi. org/ 10. 54499/ UIDB/ 00690/ 2020), UIDP/00690/2020 (https:// doi. org/ 10. 54499/ UIDP/ 00690/ 2020), and SusTEC, LA/P/0007/2020 (https://doi.org/10. 54499/ LA/P/0007/2020).info:eu-repo/semantics/publishedVersio

Magnetic states of granular layered CoFe-Al\u3csub\u3e2\u3c/sub\u3eO\u3csub\u3e3\u3c/sub\u3e

The granular layered magnetic system Co80Fe20(t)/Al2 O3 (3 nm), where the Co80Fe20 layers of nominal thickness t form separate, almost spherical magnetic granules of typical diameter 2-3 nm between the Al2O3 spacers, was studied. We discuss measurements of the dc and ac magnetic susceptibility χ for 1 n

Changes in the Fatty Acids Profile of the Zooplankton Community Reveals the Quality of Four Reservoirs in the Hydroelectric Power Plants Located in the Iguaçu River, Paraná, Brazil

Fatty acids are molecules with important physiological functions, proved to be good bioindicators of the presence of natural and chemical stressors and so used as early warning signals. Indeed, biochemical analyzes, such as fatty acids, are an important tool in water body management and water quality analysis, allowing detecting molecular changes in aquatic communities, related to the trophic status of the systems, before they are perceived in the environment. In this work was investigated the fatty acid composition on zooplankton community collected in four reservoirs of hydroelectric plants on the Iguaçu River, Brazil, and assessed the species distribution to assess and compare the water quality in these reservoirs. Results showed the trophic state index presented a wide variation among samples, ranging from oligotrophic (Salto Caxias) to hypereutrophic (Foz do Areia). The most abundant fatty acid was docosahexaenoic acid (DHA, C22:6n3) an essential fatty acid with health benefits, playing a pivotal role in biological functions. This study highlights the sensitiveness of the zooplankton community to environmental conditions and underlines the role of fatty acids as good bioindicators, being good endpoints to use in ecological studies. This supports the zooplankton contribution as a biological quality element in the assessment of reservoir quality elements

Correction: Increased policy ambition is needed to avoid the effects of climate change and reach carbon removal targets in Portugal

Correction: Regional Environmental Change (2024) 24:62 https://doi.org/10.1007/s10113-024-02217-

Increased policy ambition is needed to avoid the effects of climate change and reach carbon removal targets in Portugal

The Paris Agreement’s goal of limiting global warming hinges on forest carbon sequestration as a key in several national strategies. However, Portugal’s rising forest fire occurrences threaten its ability to meet ambitious 2030 and 2050 carbon sequestration targets. Considering fire and forest trends, this study aims to quantify whether Portugal can reach its carbon sequestration ambitions as stated in its 2030 and 2050 targets. We tested three national forest scenario extensions of the global Shared Socioeconomic Pathways (SSPs) and Shared Policy Assumptions (SPAs) based on a dynamic model, simulating forest area and carbon sequestration related to future fire risk and policies of fire management, forest management, restoration of burnt areas, and climate change adaptation. The model projects a rapidly decreasing forest area under existing Portuguese policies (PT-SSP3), a slow decline under moderate policy improvements (PT-SSP2), and an almost stable forest area under long-term sustainable policy developments (PT-SSP1). In PT-SSP3, carbon sequestration will be reduced to 60% by 2050 compared to 2015, while it declines to about 85% and 90% under PT-SSP2 and PT-SSP1, respectively. It is still plausible to reach Portugal’s 2030 sequestration obligations under the EU’s Paris Agreement target under all three scenarios, while the Portuguese GHG neutrality target is not reached in the presented scenarios. Our four introduced policy areas (increasing focus on fire and forest management, forest restoration, and climate change adaptation of forest stands) must be supplemented by other policy strategies, such as reforestation