Critics spotlight a $170 billion ‘mystery money monster’ from higher-than-expected costs in areas like hospitals, arguing government spending fuels price pressures despite strong private demand also playing a role.
Happy 65 Years: NASA’s Johnson Space Center Then and Now
Sixty-five years ago, a bold vision took root in Houston: a NASA center dedicated to human spaceflight. Since its founding, NASA’s Johnson Space Center has helped lead the nation’s human spaceflight program, supporting missions from Project Mercury through Artemis. Today, Johnson serves as NASA’s Center of Excellence for Human Spaceflight, and its workforce is helping […]
TB 26-09 Measured Hammer-Tap Inputs
For more information, contact Joel W. Sills, Langley Research Center, joel.w.sills@nasa.gov. Download the PDF version An instrumented hammer test does not require an idealized single half-sine waveform. When the complete force and response are measured accurately, crest ripples and separated contacts remain known inputs. Force shape changes excitation, but does not inherently invalidate the record. […]