Benvenuti in queste pagine dedicate a scienza ed arte. Amelia Carolina Sparavigna

Thursday, July 19, 2012

Do dolphins think nonlinearly? - physicsworld.com

Do dolphins think nonlinearly? - physicsworld.com
"Unlike solid objects such as the sea floor or fish – which reflect acoustic signals linearly, as straight-forward echoes – bubbles reflect nonlinearly. This means that acoustic echoes from bubbles contain harmonic frequencies in addition to the fundamental frequencies of the outgoing signal – producing a "clutter" that is incredibly confusing to sonar. And to make matters worse, bubbles are extremely efficient at reflecting sound."

Tuesday, July 3, 2012


Higgs Bosons Rumors: Hopes that Cern scientists have found the Higgs Boson were strengthened yesterday when rival American researchers announced their strongest evidence yet of its existence.

Sunday, July 1, 2012

Huge and old crater in Groenlandia

Descubren cráter del asteroide más antiguo y grande en Groenlandia
"Un cráter de 100 kilómetros de ancho fue descubierto en Groenlandia y corresponde al impacto más antiguo y del asteroide más grande que se conoce hasta ahora, asegura un artículo publicado en la revista Earth and Planetary Science Letters."