PURPOSE Mega-voltage cone-beam CT (MVCBCT) imaging can be used to monitor changes in neck flexion and calculate the true spinal cord dose during radiotherapy. To sum the dose over multiple fractions and compare with the planned dose requires deformable image registration. This study investigates the accuracy of deformable registration of the spine in kilovoltage CT (kVCT) to MVCBCT images for h...

many efforts have been made to model the the hot deformation (dynamic recrystallization) flow curves of different materials. phenomenological constitutive models, physical-based constitutive models and artificial neural network (ann) models are the main methods used for this purpose. however, there is no report on the modeling of warm deformation (dynamic spheroidization) flow curves of any kin...

We show that a quantum wire device with spin splitting can work as an active spin polarizer. Hot electrons in one ‘spin’ subband (e.g. ‘spin-up’) may pass such a device with weak electron pair scattering, while electrons in the opposite subband (‘spindown’) may have high conversion probability into the ‘spin-up’ subband, resulting in spin polarization of a hot electron beam. Under different cir...

Hot rolling is an essential process for the shape-forming of bearing steel. It plays a significant role in formation and distribution flow lines. In this work, effect lines investigated by analyzing microstructure mechanical anisotropy hot-rolled was found that carbides rich with Cr Mn elements are distributed unevenly along flow-line direction Moreover, characterization indicates ultimate tens...

Hot tearing formation in both a classical tensile test and during direct chill (DC) casting of aluminum alloys has been modeled using a semicoupled, two-phase approach. Following a thermal calculation, the deformation of the mushy solid is computed using a compressive rheological model that neglects the pressure of the intergranular liquid. The nonzero expansion/ compression of the solid and th...

equal channel angular rolling (ecar) process is one of the methods that have been used to makeultra-fine materials by imposing severe plastic deformation. after repeating the process severaltimes, a large effective strain is applied to the sample that can cause decreasing the grain size andimproving the mechanical and physical properties of the metal. in this study, thermal conductivityof the s...