Reutilização de resíduos da construção e demolição em obras aeroportuárias

No presente trabalho foi feito um estudo sobre a utilização de Resíduos da Construção e Demolição (RCD) em Infraestruturas Aeroportuárias na camada de Leito de Pavimento. Esta dissertação teve como base de partida um caso de estudo real, onde foi efetuada a comparação entre a solução convencional inicialmente prevista para a camada de leito de pavimento e a uma outra solução com a utilização de RCD. Na análise comparativa, foram considerados aspetos ambientais e económicos. Este tema assume cada vez mais importância, no contexto do desenvolvimento sustentável; ### REUSE CONSTRUCION AND DEMOLITION WASTE FOR AIRPORT INFRASTRUCTURES ABSTRACT: In this work a study on the use of Construction and Demolition Waste (C&DW) for Airport Infrastructures in the pavement foundation. This dissertation thesis was based on starting a real case study where a comparison between the conventional solution initially planned to the pavement foundation and another solution with the use of C&DW was made. The comparative analysis included environmental and economic aspects. This issue takes on more importance in the context of sustainable development

Evapotranspiration from a Mediterranean evergreen oak savannah: The role of trees and pasture

Mediterranean evergreen oak woodlands of southern Portugal (montados) are savannah-type ecosystems with a widely sparse tree cover, over extensive grassland. Therefore, ecosystem water fluxes derive from two quite differentiated sources: the trees and the pasture. Partitioning of fluxes according to these different sources is necessary to quantify overall ecosystem water losses as well as to improve knowledge on its functional behaviour. In southern Iberia, these woodlands are subjected to recurrent droughts. Therefore, reaction/resilience to water stress becomes an essential feature of vegetation on these ecosystems. Long-term tree transpiration was recorded for 6 years from a sample of holm oak (Quercus ilex ssp. rotundifolia) trees, using the Granier sap flow method. Ecosystem transpiration was measured by the eddy covariance technique for an 11-month period (February to December 2005), partly coincident with a drought year. Pasture transpiration was estimated as the difference between ecosystem (eddy covariance) and tree (sap flow) transpiration. Pasture transpiration stopped during the summer, when the surface soil dried up. In the other seasons, pasture transpiration showed a strong dependence on rainfall occurrence and on top soil water. Conversely, trees were able to maintain transpiration throughout the summer due to the deep root access to groundwater. Q. ilex trees showed a high resilience to both seasonal and annual drought. Tree transpiration represented more than half of ecosystem transpiration, in spite of the low tree density (30 trees ha 1) and crown cover fraction (21%). Tree evapotranspiration was dominated by transpiration (76%), and interception loss represented only 24% of overall tree evaporatio

Do We Have a Culprit? An Association of Giant Cell Arteritis with Pulmonary Embolism

Giant cell arteritis is the most common type of systemic vasculitis. An increased risk of venous thromboembolism has been described in these patients. We report the case of a 79-year-old woman with a history of polymyalgia rheumatica, who presented with left thoracic pain radiating to the neck and scapula plus temporal headache. She had no changes on physical examination, but work-up tests showed increased D-dimer levels and computed tomography pulmonary angiography revealed signs of a chronic/subacute embolism in the right inferior lobe. Anticoagulation with edoxaban was started after 5-day bridging with enoxaparin. Three weeks after the initial diagnosis the headache still persisted and she developed scalp tenderness. Giant cell arteritis was diagnosed and treated with prednisolone, with complete resolution of symptoms. Extensive diagnostic work-up was performed to identify an alternative cause of pulmonary thromboembolism; however, the investigations were negative. This case supports the hypothesis that this type of vasculitis could be related to the occurrence of pulmonary embolism

Balanço de carbono no eucaliptal - Comparação entre o fluxo turbulento de CO2 e a estimativa do modelo CO2FIX V3.1

Congresso Florestal Nacional: a floresta e as gentes - Actas das comunicaçõesEste estudo teve como principal objectivo investigar a possibilidade de utilizar o modelo CO2FIX V3 na quantificação dos stocks e fluxos de carbono numa plantação de Eucalyptus globulus através da comparação das estimativas da PLE obtidas pela parametrização do modelo e pelas medições de fluxo turbulento de CO2 obtido pelo método das flutuações instantâneas, da respiração do solo e dados de inventário

Cimicifuga racemosa (Actaea racemosa) (données phytochimiques, études pharmacologiques, activités biologiques et principales applications thérapeutiques)

LYON1-BU Santé (693882101) / SudocSudocFranceF

Quality control of CarboEurope flux data - Part I: Footprint analyses to evaluate sites in forest ecosystems

We applied a site evaluation approach combining Lagrangian Stochastic footprint modelling with a quality assessment approach for eddy-covariance data to 25 forested sites of the CarboEurope-IP network. The analysis addresses the spatial representativeness of the flux measurements, instrumental effects on data quality, spatial patterns in the data quality, and the performance of the coordinate rotation method. Our findings demonstrate that application of a footprint filter could strengthen the CarboEurope-IP flux database, since only one third of the sites is situated in truly homogeneous terrain. Almost half of the sites experience a significant reduction in eddy-covariance data quality under certain conditions, though these effects are mostly constricted to a small portion of the dataset. Reductions in data quality of the sensible heat flux are mostly induced by characteristics of the surrounding terrain, while the latent heat flux is subject to instrumentation-related problems. The Planar-Fit coordinate rotation proved to be a reliable tool for the majority of the sites using only a single set of rotation angles. Overall, we found a high average data quality for the CarboEurope-IP network, with good representativeness of the measurement data for the specified target land cover types.ISSN:1810-6277ISSN:1810-628