A $399 Smart Ring Aims to Replace the 150-Year-Old Blood Pressure Cuff

Here is SpacePolicyOnline.com’s list of space policy events for the week of July 12-18, 2026 and any insight we can offer about them. The House and Senate are in session this week. During the Week It’s a busy week, with several important congressional hearings, the next launch of SpaceX’s Starship (IFT-13), the launch of NASA’s…

1 min read Preparations for Next Moonwalk Simulations Underway (and Underwater) Back to ECF Home Advanced Diagnostics for High-Enthalpy Test Facilities Simulating Spacecraft Atmospheric Entry Damiano BaccarellaUniversity of Tennessee, KnoxvilleApplication of Resonance Enhanced Multi-Photon Ionization Diagnostics to the Characterization of Arcjet Flows​ Ciprian DumitracheColorado State UniversityUltrafast Laser Diagnostics for Nonequilibrium Flowfields Characterization in Atmospheric Entry…

Three years before the skyscraper-size asteroid Apophis makes its very close (but safe) flyby of Earth, scientists have already begun charting exactly when and where billions of people can watch it sweep across the sky. Speaking at an “Apophis T-3 Years” workshop held earlier this month at the University of Padua in Italy, retired cartographer…

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I've been building a full turbulence course on YouTube and hit the point where the algebra gets unreadable without index notation. This video is a standalone introduction to the Einstein summation convention, free vs. dummy indices, and the Kronecker delta, using the Navier-Stokes equations as the worked example throughout. Even outside fluid mechanics, if you've…

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