Multi-objective optimization of environmentally conscious chemical supply chains under demand uncertainty

In this work, we analyze the effect of demand uncertainty on the multi-objective optimization of chemical supply chains (SC) considering simultaneously their economic and environmental performance. To this end, we present a stochastic multi-scenario mixed-integer linear program (MILP) with the unique feature of incorporating explicitly the demand uncertainty using scenarios with given probability of occurrence. The environmental performance is quantified following life cycle assessment (LCA) principles, which are represented in the model formulation through standard algebraic equations. The capabilities of our approach are illustrated through a case study. We show that the stochastic solution improves the economic performance of the SC in comparison with the deterministic one at any level of the environmental impact.The authors wish to acknowledge support from the Spanish Ministry of Education and Science (ENE2011-28269-C03-03, ENE2011-22722, DPI2012-37154-C02-02, CTQ2009-14420-C02, CTQ2012-37039-C02) and Programa DRAC de la Xarxa Vives d’Universitats

Does plant richness influence animal richness?: the mammals of Catalonia (NE Spain)

Although it has long been held that plant diversity must influence animal diversity, the nature of this relationship remains poorly understood at large spatial scales. We compare the species richness patterns of vascular plants and mammals in north-eastern Spain using a 100-km(2) grain size to examine patterns of covariation. We found that the total mammal richness pattern, as well as those of herbivores and carnivores considered separately, only weakly corresponded to the pattern of plants. Rather, mammal richness was best described by climatic variables incorporating water inputs, and after adding these variables to multiple regression models, plant and mammal richness were virtually independent. We conclude that the observed association, although weak, is explained by shared responses of both groups to climate, and thus, plant richness has no influence on the richness pattern of Catalan mammals

Data fusion of ultrasound and GPR signals for analysis of historic walls

[EN] This paper presents an application of ultrasounds and ground-penetrating radar (GPR) for analysis of historic walls. The objectives are to characterize the deformation of a historic wall under different levels of load weights and to obtain an enhanced image of the wall. A new method that fuses data from ultrasound and GPR traces is proposed which is based on order statistics digital filters. Application results are presented for non destructive testing (NDT) of two replicates of historic ashlars' masonry walls: the first one homogeneous and the second one containing controlled defects such as cracks and nooks. The walls are measured separately using ultrasounds and GPR at different load steps. Time and frequency parameters extracted from the signals and different B-Scans for each of the NDT techniques are obtained. After this, a new fused representation is obtained, which results demonstrate the improvement of characterization and defect detection in historic walls using data fusion.This work has been supported by Generalitat Valenciana under grant PROMETEO/2010/040, and Spanish Administration and European Union FEDER Prog. under grant TEC2011-23403 01/01/2012.Salazar Afanador, A.; Gosálbez Castillo, J.; Safont Armero, G.; Vergara Domínguez, L. (2012). Data fusion of ultrasound and GPR signals for analysis of historic walls. IOP Conference Series: Materials Science and Engineering. 42:1-4. https://doi.org/10.1088/1757-899X/42/1/012008S144

Un

T. favosus claramuntae parasite de la Musaraigne Crocidura russula russula est décrit de l’île Meda Gran, Girona (ou Gérone) (Espagne). Cette sous-espèce se caractérise par la morphologie et la chétotaxie du sternite VIII. Seul le mâle est actuellement connu

Contribution à l’étude des

Cinq espèces d’Ixodidae parasites des micromammifères ont été identifiées dans le Nord-Ouest de l’Espagne, plus particulièrement dans les Monts Cantabriques. Parmi ces espèces, les auteurs soulignent la présence d’Ixodes acuminatus (Neumann, 1901) et d’Ixodes trianguliceps (Birula, 1895) qui, à leur connaissance, n’ont jamais été signalés dans la Péninsule Ibérique