a high percentage of world copper production is obtained from porphyry copper reserves, these reserves are characterized by: very high tonnage, greater horizontal dimensions than vertical, association with stock like intrusion masses, dispersed minerals in the porphyry mass and in its neighbor rocks, intense sericitization and inplace silicification. the porphyry coppers are concentrated by flo...

BACKGROUND Sickness absence rates in the UK continue to exceed those in much of the developed world, with an annual cost to employers of £29 billion. Rates of sickness absence in the public sector are higher than those in the private sector, with the exception of the fire service where they are consistently lower. AIMS To understand the influences that increase attendance among operational fi...

Experience gained from the Global Malaria Eradication Program (1955-72) identified a set of shared technical and operational factors that enabled some countries to successfully eliminate malaria. Spatial data for these factors were assembled for all malaria-endemic countries and combined to provide an objective, relative ranking of countries by technical, operational, and combined elimination f...

This study explored factors associated with successful development and implementation of medication error reporting (MER) systems in different healthcare contexts. A descriptive online questionnaire comprising of structured and open-ended questions was responded to by 16 medication safety experts in 16 countries. The present paper describes the rich and multidimensional qualitative data from th...

To make the activities of food service companies more sustainable, it is essential to continuously improve their production processes. Understanding which factors are associated with phenomenon waste, as well how they causally related, for proposing effective actions mitigate it. However, vast majority studies consider only analysis behavioral in waste. fill this gap, work evaluates and operati...

The growth of Business-to-Consumer e-commerce has been slower than expected due to the fundamental lack of faith between pure Internet retailers (retailers conducting business exclusively over the Internet) and eshoppers. Recognizing the importance of trust in e-relationships, extensive research has been done in this area. An analysis of the past research reveals that unlike brick and mortar fi...

the modern surgical endodontic treatment is a safe and predictable procedure with high success rate. however, several factors can retard or impede the proper healing process. use of a high speed handpiece during hard tissues management (osteotomy and apical resection) can potentially be one of these factors. formation of metallic debris from the surgical diamond burs, production of necrotic loc...