Man who heckled Abdul El-Sayed is former Josh Hawley aide, records show
Thomas Teepell, who worked for Republican senator, demanded El-Sayed disavow Muslim Brotherhood A man who heckled Democratic candidate for Senate Abdul El-Sayed and demanded he disavow the Muslim Brotherhood at a Michigan townhall is a former aide to the Republican senator Josh Hawley, according to congressional staff records. At the event on Saturday, an attendee who gave his name only as “Tommy” shouted from the crowd, asking whether El-Sayed would disavow the movement. El-Sayed answered: “Sure, yeah, absolutely,” then turned the question around, asking whether the man assumed he wouldn’t. Continue reading...
US gave us no warning of Russian strikes on Kyiv power plants, Zelenskyy says
Ukrainian president accuses Washington of ‘denial of reality’ in ongoing row with Trump over apparent support for Moscow Ukraine did not receive a warning from the US about an impending Russian missile attack on Sunday evening, Volodymyr Zelenskyy has said, reviving concerns that Washington is withholding intelligence in order to bully Kyiv into capitulating to Moscow. Yuri Ihnat, a spokesperson for the Ukrainian Air Force, said on television on Monday morning that Ukraine had not received a warning before a Russian missile barrage hit power plants in Kyiv at around 11pm. Earlier, a Ukrainian government official had told the Guardian the US had not warned the capital about the impending missile strike. Continue reading...
Experimental Facilities
8 min read Preparations for Next Moonwalk Simulations Underway (and Underwater) Research teams at the NASA Glenn Research Center perform experiments in world-class facilities such as the 9- by 15-Foot Low-Speed Wind Tunnel (9 x15 LSWT), the Aero-Acoustic Propulsion Laboratory (AAPL), the Small Hot Jet Acoustic Rig (SHJAR), the Nozzle Acoustic Test Rig (NATR), the DGEN AeroPropulsion Research Turbofan (DART), and the Acoustical Testing Laboratory (ATL). 9×15 Low-Speed Wind Tunnel (9×15 LSWT) The 9- by 15-Foot Low Speed Wind Tunnel is specially designed to give researchers a controlled environment to study aircraft engine aerodynamics and acoustics at takeoff and landing conditions. This helps us to reduce noise in communities near airports. Major modifications were completed in 2019 to improve the flow and lower the background noise of the tunnel. A new 5-sensor traversing microphone rake helps measure sound produced by scale experimental propulsors. Read more about the capabilities of the 9 x 15 LSWT on our facilities page. Advanced Ducted Propulsor (ADP) Fan Commissioning Test (side view) in the 9×15 Low-Speed Wind Tunnel. NASA Aero-Acoustic Propulsion Laboratory (AAPL) The Aero-A
Software
5 min read Preparations for Next Moonwalk Simulations Underway (and Underwater) Research teams at NASA’s Glenn Research Center are involved in developing theory and software to predict the noise from aircraft engines. This software helps engineers to design and analyze new and improved aircraft propulsion systems. Copies of our software can be requested from NASA’s Software Catalog. Aerodynamic predictions of a the hot exhaust flow through a dual stream nozzle with chevrons. NASA JeNo Development of jet noise prediction codes is multifaceted. Since JeNo predicts jet noise using Lilley’s Acoustic Analogy and the mean flow solutions from a Reynolds-Averaged Navier-Stokes (RANS) code, accurate acoustic predictions hinge on accurate aerodynamic predictions. This is why acoustic source modeling and turbulence modeling, together with the development of advanced measurement systems, are the leading areas of research in jet noise prediction at NASA Glenn. RANS-based jet noise prediction schemes based on Lilley’s Acoustic Analogy offer relatively quick answers compared to those from alternative methods like Large-Eddy Simulations (LES) or Direct Numerical Simulation (DNS). The JeNo jet nois
The Perfect Liberal
Now that the triumphalism of the post–Cold War era is dying, what can replace it?
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