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Low vitamin D status in Europe: moving from evidence to sound public health policies
Low vitamin D status public health policies
2018/11/28
There is no doubt that interest in vitamin D has burgeoned over the past few decades. Between 1995 and 2015, annual peer-reviewed, vitamin D–related publications have quadrupled (1). Over this same pe...
Manufacturing sound absorber based on combined recycling of polyethylene trephetalat and polystyrene at low and median frequencies
plastic recycling polyetylen trephetalat (PET) polyetylen (PE) combined recycling low frequency sound absorber
2009/12/15
Background and aim: Noise pollution is one of the main cause of occupational hearing loss. According to WHO reports in many countries workers have been exposed to 85 - 90 dB noise level. The purpose o...
SOUND FIELD DIFFUSIVITY AT THE TOP SURFACE OF SCHROEDER DIFFUSER BARRIERS
Noise barrier schroeder diffusers boundary element method diffusion coefficients
2010/4/6
Reactive barriers are one of the most promising and novel environmental noise barriers. In this case
using Schroeder diffusers (e.g. quadratic residue diffusers) on the top surface of the T-shape bar...