Due to the peculiar morphology of its preotic head, lampreys have long been treated as an intermediate animal which links amphioxus and gnathostomes. To reevaluate the segmental theory of classical comparative embryology, mesodermal development was observed in embryos of a lamprey, Lampetra japonica, by scanning electron microscopy and immunohistochemistry. Signs of segmentation are visible in ...

Friedrichs and Dressler and Gol’denveiser and Kolos have independently shown that the classical plate theory of Kirchhoff is the leading term of the outer expansion solution (in a small thickness parameter) for the linear elasto-statics of thin, flat, isotropic bodies. As expected, neither this leading term nor the full outer solution alone is able to satisfy arbitrarily prescribed edge conditi...

Accurate debris-flow modelling depends on the ability to simulate surging and pulsing behaviour. However, our understanding of these phenomena is starved observational constraints. Here we propose use seismic measurements, which resolve arrival coarse-grained roll wave fronts in debris flows at Illgraben, Switzerland. Roll waves likely play a key role flow pulses but are typically only observed...

The noise level in a tractor cab directly affects the driving experience. Reducing is an important means of improving image product brand and protecting physical psychological health employees. To reduce medium- low-frequency cab, influence installation coupled resonance acoustic materials (CRAMs) on driver ear investigated this study. Theories for sound absorption by perforated plates insulati...

This paper proposes the use of Jacobi polynomials to approximate higher-order theories beam, plate, and shell structures. The Carrera unified formulation is used in this context express displacement kinematics a hierarchical form. In manner, classical complex can be implemented with ease. Particular attention focused on attenuation correction shear locking. Therefore, reduced integration as wel...