The dimensions of the cubic box were set based on the experimentally measured density. The initial structure was created by randomly placing atoms in the cell. The AIMD calculations were performed using our DFT code, the Finite-Element-Method-based Total Energy Calculation Kit (FEMTECK), which enables high-efficiency DFT computations of amorphous materials on massively parallel supercomputers. All production runs were performed with an average cutoff energy of 75-85 Ry. Norm-conserving pseudopotentials were used to represent the ionic cores. Realistic atomic and electronic structures of oxide glasses, including boron-ring structures, have been successfully constructed via a meltquenching route using FEMTECK. In each case, the initial structure was equilibrated at 4000 K for 80 ps, and the molten glass was subsequently cooled to 300 K at a cooling rate of 20 K/ps. Once the system temperature had reached 300 K, a production run for 100 ps was performed to sample the atomic structure of the solid glass.