One of our favorite beauty hacks of late is using the best freckle pens (and their tone-mimicking pigments) to fake real ...

Join us in this exciting tutorial as we dive into the captivating world of pen spinning tricks! Whether you're a beginner or ...

Abstract: This letter presents a novel easy-to-manufacture ball-pen gap waveguide (GW) by utilizing commercial low-cost ball pens to have mechanical reconfigurability. The proposed ball-pen GW ...