Perforating operations induce changes in the physical state of well casings, and the resultant abnormal magnetic positioning signals severely interfere with downhole casing coupling identification and ...

An experimental graphene optical system uses red, green and blue light challenges, transformer-assisted image analysis and binary codes to create programmable hardware-based authentication responses.

Researchers fabricated a 1200 lines/mm gold-coated pulse compression grating with 91.4 percent average diffraction efficiency ...