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3 giorni fa · Sonar ( sound navigation and ranging or sonic navigation and ranging) [2] is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances ( ranging ), communicate with or detect objects on or under the surface of the water, such as other vessels. [3]
3 giorni fa · Photon - Wikipedia. A photon (from Ancient Greek φῶς, φωτός (phôs, phōtós) 'light') is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force.
3 giorni fa · It’s no secret that dogs can learn to associate certain words with specific behaviors, such as “sit” and “stay.” Now, new research published last week in the journal Current Biology ...
3 giorni fa · The Korean Wave or Hallyu ( Korean : 한류; Hanja : 韓流; RR : Hallyu; lit. Flow/Wave of Korea; listen ⓘ) is a cultural phenomenon in which the global popularity of South Korean popular culture has dramatically risen since the 1990s.
1 giorno fa · Researchers at AMOLF, in collaboration with partners from Germany, Switzerland, and Austria, have realized a new type of metamaterial through which sound waves flow in an unprecedented fashion. It ...
13 ore fa · Share This. Thanks in advance for spreading the word! “Wheels to Waves” is a new feature-length video that follows a group of new and old friends on a 600-kilometer journey around Indonesia’s alluring Lombok Island, experiencing the picturesque island’s challenging terrain, stunning beaches, and unique culture.
2 giorni fa · Alfvén Waves at Mars. The solar wind upstream of Mars's bow shock can be described in terms of Alfvénic turbulence, with an incompressible energy cascade rate of 10−17 J m −3 s −1 at magnetohydrodynamics (MHD) scales. The solar wind has more Alfvén waves propagating outwards from the Sun (than inwards) and a median Alfvén ratio of ∼ ...