Phase (matter)

  1. Low-level helicopter flights have higher fatality proportion in Part 91 operations
    Analysis of 403 US helicopter low-level flight accidents reveals Part 91 operations have 30% fatal accident rates versus 12% for Part 137, suggesting operational context impacts safety more than.
  2. Coupled finite element method simulates freeze-induced crack propagation
    A coupled computational method for simulating ice-induced fracturing in rock masses, validated against freezing experiments and applied to slope stability in permafrost regions.
  3. Ultrathin chiral nanosheets improved gas chromatography separations
    Ultrathin 2D nanosheets from exfoliated chiral ionic organic crystals enable high-resolution gas chromatography with exceptional enantioselectivity for pharmaceutical compound separation.