230 documents found, page 1 of 23
Um duplo muito especial : anotações sobre o futuro dos objectos artificiais
Dias, RuiArLíquido Design Journal. ISSN 1646-1894. N. 1 (2005).
Do investors tend to overreact when investing in clean energy stock indices?
Dias, Rui; Galvão, Rosa; Cruz, Sandra; Gonçalves, Sidalina; Irfan, Mohammad; Teixeira, Nuno; Alexandre, Paulo; Palma, Cristina; Almeida, LilianaDue to climate change, investors are increasingly interested in clean energy stocks attracting many investors due to clean energy prospects. This paper analyses investor overreactions to long-term prices in various clean energy stock indices, such as Clean Energy Fuels (CLNE), Global Clean Energy (GCEI), as well as the Dow Jones Industrials (DJI) stock index, over the period from 24 February 2022 to 23 May 2024...
Delving into the exchange-traded funds (ETFs) market: understanding market effi...
Dias, Rui; Galvão, Rosa; Irfan, Mohammad; Alexande, Paulo; Gonçalves, Sidalina; Almeida, LilianaExchange-traded funds (ETFs) are the most popular products in the financial sector today. There is extensive literature on the multifractal analysis of some stock markets, but not about the multifractal behaviour of the ETF market. This study examines the efficiency of stock index ETFs worldwide from an Efficient Market Hypothesis (EMH) perspective, using the ETFs: Ishares Msci World ETF (URTH), Ishares Russell...
Determinants of auditor choice: evidence from Sharia Commercial Banks in Indonesia
Filianti, Dian; Dias, Rui; Rusmita, Sylva Alif; Irfan, Mohammad; Putri, Athifa Hafizha; Galvão, RosaThis research aims to determine the impact of corporate governance, firm complexity, foreign ownership, and ownership concentration towards auditor choice for Sharia commercial banks in Indonesia in 2016-2023. Firm size is also accounted for as a control variable. This research was conducted using a quantitative approach using the logit logistic regression analysis method through the Eviews 13 software. The sam...
The influence of the international oil price on the EUR/USD exchange rate
Dias, Rui; Galvão, Rosa; Alexandre, Paulo; Teixeira, Nuno; Palma, Cristina; Leote, FranciscoThe study analyses the influence of the international oil price, focusing on the CBOE Crude Oil Volatility Index and Brent crude oil, on the main exchange rates: EUR/GBP, EUR/USD, GBP/USD, USD/CHF and USD/JPY. The analysis covers the period from 3 January 2022 to 8 December 2024 to examine the relationship between fluctuations in the oil market and the behaviour of exchange rates. The results show that the CBOE...
Ordovician–Silurian transition in the Central-Iberian Zone: Just a stratigraphi...
Tereso, Vitor; Dias, Rui; Roseiro, José; Romão, José; Coke, Carlos; Fonseca, Rita; Ribeiro, AntónioABSTRACT: The Ordovician-Silurian boundary in the Central-Iberian Zone is often considered a normal stratigraphic transition. Nevertheless, in studies carried out in Portugal (e.g. Espinhosela, São Mamede and Buçaco areas) and Spain (e.g. Alcañices Synform) this contact is marked by the development of shear zones subparallel to the lithostratigraphic units. Ongoing structural mapping in Celorico de Basto (Marão...
Guia metodológico para a construção dos Referenciais de Competências Técnicas d...
Instituto Nacional de Administração; Direção-Geral da Administração e do Emprego Público; Nunes, Cristina Pereira; Marcelino, Vanina; Ribas, Ana
Analysing comovements between dirty and green energies: An econometric approach
João, Esperança; Dias, Rui; Alexandre, Paulo; Teixeira, Nuno; Gonçalves, Sidalina; Galvão, RosaThis study analyses the movement patterns between clean energy indices and oil benchmarks such as Brent and WTI from 7 January 2022 to 8 November 2024, intending to verify whether clean energy indices can serve as effective risk diversification instruments. The research focuses on the Nasdaq Clean Edge Green Energy (CELS), S&P Global Clean Energy (SPGTCLEN), Clean Energy Fuels (CLNE) indices and the Invesco Wil...
Strain partitioning in transpression; a major feature in the evolution of the I...
Dias, Rui; Araújo, Alexandre; Couto, Helena; Cruz, Cláudia; Ferreira, Joana; Gonçalves, Ana Marta; Lima, Alexandre; Lopes, Luís; Moreira, NoelAs the wavy pattern of fold belts is a common feature, since its recognition, the transpressive regimes were expected to be a pervasive mechanism on their evolution. Nevertheless, even in regions where oblique shortening is inferred, typical structures of transpression (e.g. transected cleavage and en echelon folds, shear or veins) are often absent. Instead, what is frequently observed is the juxtaposition of n...
Variscan inversion of a Silurian basin: The role of preexisting features on she...
Tereso, Vitor; Dias, Rui; Roseiro, José; Romão, JoséIt is of broad consensus that during Silurian times the seawater anoxia-euxinia levels were enhanced, particularly from the mid Llandovery, often persisting until the Ludlow and Pridoli. The likely stratification of the water column, promoted by the steady Palaeozoic drift conditions, led to the accumulation of organic-rich sediments. This has been recognized throughout the whole Iberian Massif, in sedimentary ...