We propose a general scenario to analyze technological changes in socio-economic environments. We illustrate the ideas with a model that incorporating the main trends is simple enough to extract analytical results and, at the same time, sufficiently complex to display a rich dynamic behavior. Our study shows that there exists a macroscopic observable that is maximized in a regime where the syst...

Management of natural ecosystems, like forests, has several objectives such as wood production, sustainability of ecological systems, preserving aestheti,c and cultural or psychological satisfaction. This management is especially essential in dry regions with sensitive biodiversity, like Iran. The aim of this research is to elaborate a management scheme for developing a sustainable tourism plan...

BACKGROUND Inter-relationships among built and socioeconomic environmental characteristics may result in confounding of associations between environment exposure measures and health behaviors or outcomes, but traditional multivariate adjustment can be inappropriate due to collinearity. METHODS We used principal factor analysis to describe inter-relationships between a large set of Geographic ...

BACKGROUND Cognitive development in childhood is negatively affected by socioeconomic disadvantage. This study examined whether differences in fetal environment might mediate the association between family socioeconomic position and child development. METHODS Data were linked from the Scottish Longitudinal Study, maternity inpatient records and the Child Health Surveillance Programme - Pre Sc...