Christian Andreas Doppler was an Austrian physicist and mathematician whose 1842 description of what we now call the Doppler Effect fundamentally changed the understanding of wave phenomena. His insight—that the observed frequency of a wave depends on the relative motion between the source and the observer—forms a cornerstone of modern physics, astronomy, and engineering.
Continue reading “Remembering Christian Doppler (1803–1853): The Physicist Behind the Doppler Effect”
In 1921, U.S. Army Brigadier General William “Billy” Mitchell demonstrated what many considered unthinkable at the time: aircraft could sink battleships. Under his direction, Army-Air Service bombers successfully destroyed decommissioned warships — including the former German battleship Ostfriesland and the U.S. Alabama — during highly publicized bombing trials, proving that aerial bombs posed a genuine threat even to heavily armored capital ships.
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This post has been updated with a statement from Fincantieri
The Navy is walking away from the Constellation-class frigate program to focus on new classes of warships the service can build faster, Secretary of the Navy John Phelan announced Tuesday on social media.
Continue reading “Navy Cancels Constellation-class Frigate Program, Considering New Small Surface Combatants”
Trump administration job cuts worsen U.S. vulnerabilities to China and other cyber-adversaries.
Opinion
Lauryn Williams is deputy director and senior fellow in the Strategic Technologies Program at the Center for Strategic and International Studies.
Continue reading “The cyberattacks are coming. Will anyone be there to stop them?”
Most Americans are aware of the era of lawlessness in this country that began with the passage of the Eighteenth Amendment to the Constitution in 1919, making Prohibition the law of the land. By 1924, five years after the beginning of the “Great Experiment,” defiance of the Prohibition laws had grown to such an extent that Congress appropriated $13,853,980 just to expand the U.S. Coast Guard’s enforcement capabilities.
Continue reading “Radio New York: The First Civilian Intercept Station?”
Station HYPO 