BACKGROUND Workers on dredgers and lighters on rivers are exposed to the inhalation of aerosols and dusts. OBJECTIVE The aim of this study was to investigate effects of river silt aerosol and dust exposure on the respiratory health of dredging employees. METHODS Six examinations were performed over a period of 2 years at 4-monthly intervals in 54 seamen with higher silt aerosol exposure and...

On the morning of Monday, August 29, 2005, Hurricane Katrina made landfall in southeast Louisiana. The levee system of New Orleans failed catastrophically. Storm surges penetrated the entire city and lingered for weeks. Hurricane Katrina became known as one of the most intense, costliest, and deadliest natural disasters ever recorded in the history of the United States. Almost exactly 3 years l...

Context. The origin of the Martian moons Phobos and Deimos is still poorly understood, focus intense debate. Aims. We demonstrate that a stratified internal structure compatible with observed gravity coefficients. Methods. fit previously derived C 20 22 coefficients from combined MEX Doppler-tracking data close flybys in +2010 2013 respect to corresponding core–mantle stratification model Phobo...