To test if Launchpad works, eject the Kindle from your computer. Then, on the Kindle, press the shift key twice, followed by ...

Abstract: Unmanned aerial vehicles (UAVs) have emerged as promising platforms for fast, energy-efficient, and cost-effective package delivery. Path planning in 3-D urban environments is critical to ...

Abstract: This letter demonstrates that an inexpensive, easy-to-deploy, and portable 3-D-printed all-dielectric corner-like Bragg reflector can boost antenna gain. Notably, the concept shown here ...

Hannah Harper is a wellness editor for Health. Previously, she was an associate editor, assistant editor, and editorial assistant for Health. She covers topics on nutrition, women's health, and more.

Javascript must be enabled to use this site. Please enable Javascript in your browser and try again. Explore the ways AARP can help you spend less and save more on ...

Alex Yampolsky, PharmD, is a pediatric clinical pharmacist at Elizabeth Seton Children’s center where he optimizes the comfort and care of his patients. Taking vitamin C and D together is generally ...