3 documents found, page 1 of 1
Pseudotsuga menziesii ((Mirb.) Franco) in Portugal: A Review of Species Charact...
Fonseca, Teresa Fidalgo; Silva, M. E.; Lousada, J. L.; Luis, J. S.; Gonçalves, Ana CristinaPseudotsuga menziesii ((Mirb.) Franco), known as Douglas fir, is a prominent conifer species native to North America. It is known for its adaptability, rapid growth, and high-quality wood. It was introduced to Europe in the nineteenth century and is currently the most abundant non-native tree species cultivated in Central European forests. In Portugal, the species was initially cultivated as an ornamental plant...
Management of Pinus pinaster Aiton for wood and resin production: A technical-f...
Sandim, A.; Silva, M. E.; Gonçalves, Ana Cristina; Tomé, M.; Fonseca, T. F.Maritime Pine sector is an important agent for promoting economy and sustainable development in Portugal. Among the products explored in these forests are wood and resin. The objective of this work was to evaluate the technical and financial viability from the creation of three simulated exploration scenarios: Wood Exploration (W), Resin (R) and Wood + Resin (WR), for this it was defined a loss of 16% of wood v...
A generalization of chromatic polynomial of a graph subdivision
Cardoso, D. M.; Silva, M. E.; Szymanski, J.Considering the partitions of a set into nonempty subsets, we obtain an expression for the number of all partitions of a given type. The chromatic polynomial of a graph subdivision is generalized, considering two sets of colors, and a general explicit expression is obtained for this generalization. Using these results, we determine the generalized chromatic polynomial for the particular case of complete graph s...