{tag=2007 Nobel Prize in Physics}
{title2=1988}
{wiki}

\Video[https://www.youtube.com/watch?v=1vSQ9u1SP2M]
{title=Introduction to Spintronics by Aurélien Manchon (2020) <giant magnetoresistance> section}
{description=
Describes how <giant magnetoresistance> was used in <magnetoresistive disk heads> in the 90's providing a huge improvement in <disk storage> density over the pre-existing <inductive sensors>

More comments at: <video Introduction to Spintronics by Aurélien Manchon (2020)>.
}
{start=461}


Giant magnetoresistance

{wiki}

A fancy name for <astronomy> ;-)


Astrophysics

Strava

Comedy troupe

{wiki}

\Image[https://upload.wikimedia.org/wikipedia/commons/thumb/2/20/Compulsive_hoarding_Apartment.jpg/300px-Compulsive_hoarding_Apartment.jpg]


Compulsive hoarding

* https://www.quora.com/How-is-a-voice-transmitted-from-one-phone-to-another
* https://www.quora.com/How-many-wires-does-a-telephone-use/answer/Peter-Yardley-1
  > Basic analogue phones connected to the public exchange use two wires mainly arranged as a twisted pair to reduce noise. The voice signal is differential (the voltage in one wire equal and opposite to the other) biased above ground by 48V. Using a twisted pair reduces induced noise because the noise signal will induce an equal voltage in each wire and because the signal is transmitted as the difference the effect of the induced noise will be dramatically reduced.

\Video[https://www.youtube.com/watch?v=8bwLjU90puA]
{title=Phone Intercom by Make (2014)}
{description=This video illustrates will the incredible simplicity of the connection of a telephone system. Compare that to the relative complexity of <wireless> communication, which requires <modulation>.}

\Video[https://www.youtube.com/watch?v=JPau8xDE3pk]
{title=Making a Microphone Work with an Oscilloscope by Environmental Radiation LLC (2012)}
{description=Not the most detailed setup, but good.}


How the telephone works

Mathematics YouTube channel

Musical instrument

Music education

{wiki=Synthesizer\#Sound_synthesis}

Technique to make cool sound instruments mathematically, either with electronic hardware components, or with a <software synthesizer>.

Good tutorials:
* <Csound FLOSS manual>

Best known techniques:
* <additive synthesis>
* <subtractive synthesis>


Sound synthesis

{wiki}

\Image[https://upload.wikimedia.org/wikipedia/commons/thumb/7/75/US_postage_stamps_on_album_pages.jpg/800px-US_postage_stamps_on_album_pages.jpg]


Stamp collecting

Title track

Board game

{wiki}

Nice result on <Lebesgue measurable> required for uniqueness.


Cauchy's functional equation

Chocolate

Etymology

Figure of speech

Game classification

Hand game

{tag=Good}
{wiki}

See also: <having more than one natural language is bad for the world>.


Ciro Santilli @cirosantilli 37