Introducción: la baja visión y ceguera tienen alta prevalencia mundial, siendo categorías de discapacidad frecuentes en Colombia. Se requieren estudios que caractericen etiología las deficiencias visuales permanentes. Objetivo: Identificar caracterizar diferentes causas siete centros referencia para población con visual Colombia, atendida entre los años 2012 a 2017 seis ciudades capitales. Mate...

The studied limestone is a well known Portuguese natural stone that occurs in Valverde—Alcanede region, located the Maciço Calcário Estremenho (center of Portugal). This used several exterior and interior applications such as paving, cladding, masonry decorations. Slabs made were installed ventilated facade with “kerf” anchoring system building Valencia (Spain). After approximately five years, ...

Bluish-grey limestones have been extensively used as ornamental stones for decoration purposes in buildings, well works of art, and accordingly, the target intense exploration. In Portugal, Jurassic limestone massif known Maciço Calcário Estremenho (MCE), has source grey-coloured stones, namely Azul Valverde (one most well-known bluish-grey limestones) Atlantic Blue varieties, both which may un...

This edited volume of articles focuses on the value of risk assessment for policy solutions to environmental problems. It succeeds, through a series of case studies, in illustrating various available methodologies and the implications of the subsequent results. Finally, it serves to update social scientists as to the current state of environmental risk assessment, and thereby provides a useful ...