The operability limits of a supersonic combustion engine for an air-breathing hypersonic vehicle are characterized using numerical simulations and an uncertainty quantification methodology. The time-dependent compressible flow equations with heat release are solved in a simplified configuration. Verification, calibration and validation are carried out to assess the ability of the model to repro...

Preaspiration is usually associated with stops rather than fricatives, both at phonological and phonetic levels of description. This study reports the occurrence of phonetic (nonnormative) preaspiration of voiceless fricatives in Scottish Standard English (SSE) spoken in the Central Belt of Scotland. We classify it as non-normative because it is variably present in different speakers, but the d...

DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclose...

Commercial fishers face a range of stressors that impact physical and mental health. However, there is limited research on the level ill-health among nature contribute to their psychological distress. This paper focuses experiences commercial wild-catch analyses results an Australian national survey conducted in 2017 (n = 872) (Appendix S1). We first assess underlying themes perceived stressors...

Interest in hydrogen (H2) energy has exploded the last few years. Much of interest comes from transitioning to a decarbonised future, through use renewables, convert hydrogen-rich materials (methane, water) pure gas streams. Each these methods have their own challenges, such as need for carbon capture and storage manage emissions or perspectives on fresh water. At same time this engineered appr...