Academia.edu no longer supports Internet Explorer.
To browse Academia.edu and the wider internet faster and more securely, please take a few seconds to upgrade your browser.
2008, Marine Micropaleontology
Marine Geology
Atlantic sea surface temperatures estimated from planktonic foraminifera off the Iberian Margin over the last 40Ka BP2015 •
A B S T R A C T The Regional Ocean Modeling System ocean model is used to simulate the decadal evolution of the regional waters in offshore Iberia in response to atmospheric fields given by ECMWF ERA-40 (1961Á2001) and ERA-Interim (1989Á2008) reanalyses. The simulated sea surface temperature (SST) fields are verified against satellite AVHRR SST, and they are analysed to characterise the variability and trends of coastal upwelling in the region. Opposing trends in upwelling frequency are found at the northern limit, where upwelling has been decreasing in recent decades, and at its southern edge, where there is some evidence of increased upwelling. These results confirm previous observational studies and, more importantly, indicate that observed SST trends are not only due to changes in radiative or atmospheric heat fluxes alone but also due to changes in upwelling dynamics, suggesting that such a process may be relevant in climate change scenarios.
Paleoceanography
Sea Surface Temperature reconstructions over the last 70 ky off Portugal: Biomarker data and regional modeling2015 •
Quaternary Science Reviews
Temperature and productivity changes off the western Iberian margin during the last 150 ky2010 •
Global and Planetary Change
Planktic foraminiferal responses to orbital scale oceanographic changes off the western Iberian margin over the last 900kyr: Results from IODP site U13912015 •
Evangelos Ch. Tsirogiannis, Evangelos Daskalakis, Christos Vogiatzis, Foivos Psarommatis, Paulo Bartolo, Advanced composite armor protection systems for military vehicles: Design methodology, ballistic testing, and comparison, Composites Science and Technology, Volume 251, 2024, 110486
Advanced composite armor protection systems for military vehicles: Design methodology, ballistic testing, and comparisonThis study presents a new methodology for designing, manufacturing, and testing advanced armor protection systems and applied to the development of three different protection solutions suitable for real armored vehicles. The backplate laminates of the presented composite armor protection solutions were composed of three different materials: steel, aluminum AA6082, and aluminum alloy AA2024 reinforced by multi-walled carbon nanotubes (MWCNTs). The frontal laminates remained the same for the three cases. Keeping almost the same mass while changing the material of each backplate and adapting the thickness, the three different protection systems were ballistically tested and compared according to Level 4 (Level IV) of the standard AEP-STANAG 4569 (projectile 14.5 mm × 114 mm API B32) with real military tests. Furthermore, the performance of the total laminated structure and the performance of each backplate in the total laminated structure were compared in terms of deformation and ballistic fractures. High-quality images acquired by the high-speed camera were helpful in evaluating and comparing the backplates and the entire protection system. The results show that all three protection configurations present high performance mechanical properties and ballistic characteristics compared to commonly used armor systems. Even the under-developed AA2024-CNTs composite is a promising near-term backplate solution.
Journal of the City Planning Institute of Japan
Study on Planning Instruments for Protection of Urban Housing in Germany1995 •
2018 •
Lancehead pit-vipers ( genus) are an extremely diverse and medically important group responsible for the greatest number of snakebite envenomations and deaths in South America. (common lancehead), responsible for majority of snakebites and related deaths within the Brazilian Amazon, is a highly adaptable and widely distributed species, whose venom variability has been related to several factors, including geographical distribution and habitat type. This study examined venoms from four populations (Belterra and Santarém, PA; Pres. Figueiredo, AM and São Bento, MA) and two additional species ( and ) from Southeastern region for their coagulotoxic effects upon different plasmas (human, amphibian, and avian). The results revealed inter⁻ and intraspecific variations in coagulotoxicity, including distinct activities between the three plasmas, with variations in the latter two linked to ecological niche occupied by the snakes. Also examined were the correlated biochemical mechanisms of ven...
arXiv (Cornell University)
Structure and magnetism in Fe-doped FeVSb and epitaxial Fe/FeVSb nanocomposite films2021 •
PLoS ONE
Modeling Habitat Split: Landscape and Life History Traits Determine Amphibian Extinction Thresholds2013 •
1999 •
International Journal of Remote Sensing
Validation of satellite rainfall products over East Africa's complex topography2007 •