Constraints on Dematerialisation and Allocation of Natural Capital along a Sustainable Growth Path

This paper extends the neoclassical growth model with natural capital by introducing two new concepts: allocation of natural capital and materialization. We consider that anthropogenic environmental impact is correlated with the throughput of the economy (materialisation). Materialisation is the material throughput per unit of economic activity. We capture the effect of the reduction of this throughput dematerialisation in the elasticities of materialisation and aggregate environmental impact. In our framework the fraction of natural capital devoted to production does not provide direct environmental services nor does it contribute to ecosystem functioning namely affecting the carrying capacity of natural capital.We analyse an optimal sustainable growth path, in the context of exogenous technological change. Our main conclusion is that the ratio of dematerialisation elasticities must equal the inverse of the share of natural capital in order to assure unbounded economic growth with constant natural capital

La teorización de la gestión y la realidad: una reflexión sobre los elementos que las distancian

Sin resume

Complete reducibility of the pseudovariety LSl

In this paper we prove that the pseudovariety LSl of local semilattices is completely κ-reducible, where κ is the implicit signature consisting of the multiplication and the ω-power. Informally speaking, given a finite equation system with rational constraints, the existence of a solution by pseudowords of the system over LSl implies the existence of a solution by κ-words of the system over LSl satisfying the same constraints.FCT through the Centro de Matemática da Universidade do MinhoEuropean Community Fund FEDE

Tameness of joins involving the pseudovariety of local semilattices

In this paper we prove that, if V is a kappa-tame pseudovariety which satisfies the pseudoidentity xy^{\omega+1}z=xyz, then the pseudovariety join LSl v V is also kappa-tame. Here, LSl denotes the pseudovariety of local semilattices and kappa denotes the implicit signature consisting of the multiplication and the (omega-1)-power. As a consequence, we deduce that LSl v V is decidable. In particular the joins LSl v Ab, LSl v G, LSl v OCR and LSl v CR are decidable.European Science Foundation (ESF) through the programme ``Automata: from Mathematics to Applications (AutoMathA)''Fundação para a Ciência e a Tecnologia (FCT) under the project PEst-C/MAT/UI0013/2011.FCT through the project PTDC/MAT/65481/2006, which was partly funded by the European Community Fund FEDEREuropean Regional Development Fund, through the programme COMPET

Unveiling Madeira’s destination image and representations through Virtual Museum of Tourism (MUVITUR)®

This article intends to demonstrate the importance of the existence of an aggregating platform for digital content, as is the case of MUVITUR – Virtual Museum of Tourism, for the research in tourism and also to assess its potential. Aiming to track the history of Madeira’s destination image, this paper also searches to contribute to the study of the ‘Atlantic Pearl’ distinctive features for promotional purposes throughout seventy years. For this purpose, the authors did an integrated search aiming to find and study the retrieved results of promotional visual materials edited during the twentieth century, focusing on Madeira Island, as an example of the potentialities of the Muvitur database. With this research, we can conclude that tourism marketing strategies seem to have succeeded to consolidate Madeira’s destination image focused on its distinctiveness. Digital objects gathered in such searchable thematic databases, with a diversity of content providers, can play a crucial role in the history of tourism and leisure, allowing us, at the same time, to know how Madeira represented the destination for promotional aims.info:eu-repo/semantics/publishedVersio