The cosmological effects of the tachyon rolling down to its ground state are discussed by coupling a simple effective field theory for the tachyon field to Einstein gravity. As the tachyon rolls down to the minimum of its potential the universe expands. Depending upon initial conditions, the scale factor may or may not start off accelerating, but ultimately it ceases to do so and the final flat...

• Inter-layer, stacked-layers and post-build rolling is modelled to investigate their interaction with wire arc additive manufacturing (WAAM) for mitigating WAAM residual stress distortion. Difference in mitigation efficacy of using flat roller slotted demonstrated explained. Influence depth cyclic deposition alter plastic strain that causes determined analysed different process conditions. Hyb...

the forging model for cold rolling is one of rolling models that is used in rolling calculations. in this model,the final rolling pressure is an average value and it is not an accurate model.also by using this model,the firction hill curves are plotted due to the central point of the rolling bite length while frictional stresses intersect at the neutral point.in this study, a new model based on...