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  • Smog clears on car exhaust catalyst design

    Smog-producing chemicals could be almost eliminated from the tailpipes of diesel cars and vans, using a new exhaust catalyst concept developed at KAUST. After systematically studying multiple catalyst compositions, the research team identified the ideal atomic recipe to catalytically remove NOx from more

  • COVID-19 impacts on the Earth System

    COVID-19 immediately affects the health, economy and social well-being in our personal lives. Yet, the consequences on the entire Earth System, in particular the ones emerging from the widespread sheltering and lock-down measures, may be much more far-fetching and long-lasting. This has been analyze more

  • First field measurements of laughing gas isotopes

    Thanks to a newly developed laser spectrometer, Empa researchers can for the first time show which processes in grassland lead to nitrous oxide emissions. The aim is to reduce emissions of this potent greenhouse gas by gaining a better understanding of the processes taking place in the soil. Nitrou more

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Definition

Acoustic Emission

Acoustic Emission Acoustic Emission (AE) is a naturally occurring phenomenon whereby external stimuli such as mechanical loading generate sources of elastic wave s. AE occurs when a small surface displacement of a material is produced. This occu ... more

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