Chronic obstructive pulmonary disease (COPD) is a non-communicable long-term condition characterised by accelerated Vehicle Covers lung-function decline and intermittent episodes of respiratory illness called exacerbations.We discuss the current understanding of the role of viruses in these elements of COPD.The burden of acute viral illness in COPD
The potential of additively manufactured porous absorbers in the design of multi-layer microperforated absorbers
Microperforated absorbers (MPA) are a well-established technology for attenuating sound in flow carrying ducts.MPAs usually consist of a microperforated panel (MPP) in combination with a cavity as back volume.The damping maxima of MPAs occur in the range of their resonant frequencies and the effect is narrowband compared to porous or fibrous absorb
Ancient DNA analyses reveal contrasting phylogeographic patterns amongst kiwi (Apteryx spp.) and a recently extinct lineage of spotted kiwi.
The little spotted kiwi (Apteryx owenii) is a flightless ratite formerly found throughout New Zealand but now greatly reduced in distribution.Previous phylogeographic studies of the related brown kiwi (A.mantelli, A.rowi and A.australis), with which little spotted kiwi was once sympatric, revealed extremely high levels of genetic structuring, with