Amaral, L. — Santos, L. — Bernardo, C.A. (2002): Uma visão do sistema científico e tecnológico português (A vision of the Portuguese scientific and technological system). In: Actas do I Workshop da Rede Internacional de Fontes de Informação e Conhecimento
Barradas, S. — Lopes, E. (2007): Processo de Convergência Regional em Portugal: Absoluta, Condicionada ou Clube? [Regional convergence process in Portugal: Absolute, Conditional or Club?]
Prospectiva e Planeamento
., 2019 ). The last mentioned is the most commonly used, and some commercially available methods have been developed with variable sensitivities ( Nielsen and Toft, 2009 ).
In Portugal, Reis and Ferreira (1988) described the first cases of
and measuring the bargaining power of workers in the USA, a clear falling labour share tendency is detected and explained for this country's case.
This paper studies the evolution of the labour share in Portugal, a southern and semi
Selenium daily intake was determined for two small groups of the Portuguese population, based on the analysis of duplicate
diet portions. The total amount of food ingested during a day was collected for 18 workers of the Technological and Nuclear
Institute (ITN-Sacavém) and for 6 females of Reguengos de Monsaraz, a small town in the south-eastern hinterland. The average
selenium daily intake was 43 ± 20 and 32 ± 13 μg per person, respectively, both lower than the Recommended Dietary Allowance
(RDA) of 55 μg day−1. Selenium in diet samples was determined by replicate sample neutron activation analysis (RSINAA). The method was considered
accurate for the selenium determination.
The Nuclear and Technological Institute (Instituto Tecnológico e Nuclear—ITN) in cooperation with the International Atomic
Energy Agency (IAEA) has been conducting a nationwide survey of hydrogen (2H/1H) and oxygen (18O/16O) isotopic composition of monthly precipitation since 1988. This paper focuses on basic features of spatial and temporal
distribution of δ18O and δ2H in the precipitation over Continental Portugal derived from ITN database. Phenomenological relationships between stable
isotopes composition of precipitation and various climate-related parameters (local air temperature, distance to the Atlantic
coast, altitude, amount of precipitation) are established and discussed.
Nowadays, the Continuously Operating Reference Station (CORS) network, combined with network RTK corrections (NRTK solution), is a widely used technique for high-accuracy positioning in real time. This “active” network realizes a reference frame and propagates it to the users. In border regions the coherence between the reference frames propagated by neighboring active networks is a critical problem. In this study the test results of post-processed and simultaneous NRTK positions at six test points located in the border region between Portugal and the Community of Andalusia, in the south west of the Iberian Peninsula, are presented. The analysis is based on two GNSS active networks present in this border region, namely RENEP (Portugal) and RAP (Community of Andalusia, Spain), a national and a local RTK network respectively, with similar characteristics. Upon comparing the post-processed position for each test point, as estimated with respect to each of the two active networks analyzed, the discrepancies found in 3D were less than 2 centimeters. The results of network-based RTK positioning were found to be successful within a 2 cm precision level in the east and north components and 4 cm for the up component. The results also confirm that the NRTK positioning accuracy is about 2 cm in horizontal and 4 cm in vertical, which can satisfy the requirement of real-time positioning users at a centimetric accuracy level, even in border regions considering extrapolated NRTK solutions.