The equations of motion (EOM) for the position and gauge invariant crystal momentum are considered for multiband wave packets of Bloch electrons.For a localized packet in a subset of bands well-separated from the rest 9021 glow of the band structure of the crystal, one can construct an effective electromagnetic Hamiltonian with respect to the cente

In this work, the nanostructure of oxide dispersion-strengthened steels was studied by small-angle neutron scattering (SANS), transmission electron microscopy (TEM), and atom probe tomography (APT).The steels under study have different alloying systems differing in their contents of Cr, V, Ti, Al, and Zr.The methods of local analysis of TEM and APT

The composite photocatalyst WO3/rGO/BiOBr(WRB) was prepared by solvothermal method.BiOBr was assembled into the WO3 nanotube beam loaded with rGO.WRB was characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), Fourier infrared spectroscopy(FT-IR) and UV-Visible spectrophotometry(UV-Vis).Using the removal rate of ciprofloxacin(CI

Gastric ectopic pancreas (EP) is an uncommon congenital anomaly in which pancreatic tissue with no anatomic connection to the main pancreas is found in the stomach.Gastric EP is often discovered incidentally when a nonspecific submucosal tumor is found in endoscopic studies or other imaging examinations.Tissue characterization by biopsy or fine-nee