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Discrete and continuous dynamical systems: preface
Pinho, Maria do Rosário; Ferreira, M. Margarida Amorim Ferreira; Fontes, Fernando A. C. C.; Pereira, Fernando L.; Smirnov, G.; Torres, Delfim F. M.These preface words, quoted in Francis Clarke's 1983 book, stroke a sensitive chord and set the tone for a vision fueling the construction of an extremely rich body of intertwined developments in nonsmooth analysis, optimization and control by a carefully networked community. This special issue comprises post-conference articles from a selection of works presented at the Workshop on Control, Nonsmooth Analys...
Evapotranspiration from a Mediterranean evergreen oak savannah: The role of tre...
Paço, Teresa A.; David, Teresa S.; Henriques, Manuel O.; Pereira, João S.; Valente, Fernanda; Banza, João; Pereira, Fernando L.; Pinto, ClaraMediterranean 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 o...
Síntese de enaminonas
Ferraz,Helena M. C; Pereira,Fernando L. C.The general term "enaminone" is applied to any compound bearing the conjugated system N-C=C-C=O. Enaminones are typical capto-dative ethylenes, showing particular properties due to pi-electron delocalization. Their reactivity can be predicted by structural patterns of substitution, conformation and configuration, making them versatile synthetic building blocks. In this review, a variety of methods for the synth...
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