Superconductivity and carbon nanotubes, are Type I, while almost all impure and compound superconductors are Type II. Conversely, a spinning superconductor generates a magnetic field, precisely aligned with the spin axis. The effect, the London moment, was put to good use in Gravity Probe B. This experiment measured the magnetic fields of four superconducting gyroscopes to determine their spin axes. This was critical to the experiment since it is one of the few ways to accurately determine the spin axis of an otherwise featureless sphere. Superconductivity was discovered on April 8, 1911 by Heike Kamerlingh Onnes, who was studying the resistance
What We Did quietest albums in Michael Gira’s catalog." What We Did What We Did is a collaborative studio album by Swans frontman Michael Gira and Windsor for the Derby member Dan Matz. It was released on November 13, 2001 through Gira's Young God Records label. "What We Did" has a considerably more pop-oriented and accessible sound, compared to Gira's other solo works. The majority of the lyrics on the album was written by Matz. Allmusic critic Thom Jurek described the album as "a finely wrought album of relayed styles and layered textures enfolding one another into a music that could have only