... have been reported worldwide, with magnitudes between 4.9 and 7.9 degrees on the Richter scale, and 5 to 27 km deep. Earthquakes have cost about 1209 lives and losses of between 1 to 3% of GDP in each country affected. If damage to the economic and productive infrastructure are considered, there have...

... Introduction Vibration is present everywhere in our environment. The two main characteristics of vibration are its frequency and magnitude (strength). Vibration is assigned to general categories based on frequency. Not all experts agree on the exact cut-off points for the categories, so any...

... These studies have shown that experts are frequently off by an order of magnitude in their prediction of the concentrations of exposure. However, there was good news here too: because of the complexity of assessing workplace exposures, predicting them within an order of magnitude could be considered a victory...