The effect of using different mesh sizes, fixing mechanisms and sound source locations on the predicted sound reduction index were looked into.
It is well known that the generation mechanism of rail corrugation consists of both the material damage and wavelength fixing mechanisms [1].
Nevertheless, it may have been rather erroneous to include the Calvin cycle, considering our growing awareness of the diversity of carbon-reducing or "fixing" mechanisms still employed on Earth today.
Most of the above investigations on rail corrugation were focused on the wavelength fixing mechanism.
In their works, the material damage mechanism is wear and the wavelength fixing mechanism is the friction-induced self-excited vibration of the wheel rail system.
In particular the antiresonance above a sleeper at the pinned pinned frequency has been identified as a wavelength fixing mechanism for short pitch corrugation.
The field of shape memory polymers (SMPs) has been dominated by polymeric systems whose fixing mechanism is based on crystallization or vitrification of the constituent chains, rendering such systems stiff in comparison to elastomers, gels, and living tissues.
Most of the essential genes were identified in photosynthetic pathways such as photorespiratory cycle (10 genes) and Calvin cycle (7 genes), indicating the rigidity of CO2 fixing mechanism in plants.
Research [1, 21, 22] shows that the wavelength fixing mechanism includes the P2 resonance of the interaction between wheel and rail, the pinned pinned resonance of tracks, the second torsional resonance of driven axles, and the transient dynamic interaction between wheel and rail due to initial rail surface roughness.
In normal cells, the DNA double-strand breaks are fixed by repair mechanisms involving BRCA1; in cells lacking BRCA1, these lesions are repaired by error-prone systems, such as nonhomologous end joining, with the consequent accumulation of mutations and complex chromosomal rearrangements that ultimately lead to cell death [ 62].
