Ghost gun printing is surging, but AI screening and microscopic toolmarks are helping slow untraceable firearm production.

Notice of Violation <br><br>“A 3D Printed Multi-Mode Conical Dielectric Resonant Antenna With Stable Omnidirectional Radiation Patterns for 5G Vehicle Picocell Applications” <br>by Xuyi Zhu, Bing ...

This article presents the design of a dielectric resonator antenna with an omnidirectional radiation pattern and circular polarization for UAV aplications. The antenna is composed of a dielectric ...