{disambiguate=programming language}
{c}
{wiki}

Ubuntu 23.04 install:
``
sudo apt install rbase
``

<Hello world>:
``
R -e 'print("hello world")'
``

Install  a package, e.g. <Bookdown>:
``
sudo R -e 'install.packages("bookdown")'
``


R (programming language)

{disambiguate=electronics}

= Wafer
{synonym}


Wafer

Wafer (electronics)

Ethology

Writing

Taipei

Brighton

Celestron

Cutout

Cutout (espionage)

{c}
{tag=Metric space}
{wiki}

= Euclidean
{synonym}

<\R^n> with extra structure added to make it into a <metric space>.


Euclidean space

European Union

John Le Carré

{c}
{tag=Physical Review Letters}
{title2=1963}
{title2=Observation of the Josephson effect}

Paper by <Philip W. Anderson> and <John M. Rowell> that first (?) experimentally observed the <Josephson effect>.

<Closed access academic journals are evil>[Paywalled] by the <American Physical Society> as of 2023 at: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.10.230

<DOI>: https://doi.org/10.1103/PhysRevLett.10.230

TODO understand the graphs in detail.

They used <tin>-oxide-<lead> tunnel at 1.5 K. TODO oxide of what? Why two different metals? They say that both films are 200 nm thick, so maybe it is:
``
   -----+------+------+-----
...  Sn | SnO2 | PbO2 | Pb  ...
   -----+------+------------
          100nm 100nm
``

A reconstruction of their circuit in <Ciro's ASCII art circuit diagram notation> TODO:
``
DC---R_10---X---G
``

There are not details of the physical construction of course. <Reproducibility> lol.

\Image[https://raw.githubusercontent.com/cirosantilli/media/master/probable-observation-of-the-josephson-superconducting-tunneling-effect/1.png]
{title=Figure 1 of <Probable observation of the Josephson superconducting tunneling effect>}
{description=TODO what do the dotted lines mean?}

\Image[https://raw.githubusercontent.com/cirosantilli/media/master/probable-observation-of-the-josephson-superconducting-tunneling-effect/1.png]
{title=Figure 2 of <Probable observation of the Josephson superconducting tunneling effect>}


Probable observation of the Josephson superconducting tunneling effect

{wiki}

The opposite of <quasiparticle>, see notaby: <quasiparticles vs elementary particles>.


Ciro Santilli @cirosantilli 37