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
Heike Shamisen Heike Shamisen The heike shamisen (Japanese: ), is a Japanese musical instrument, member of the shamisen family. Like its other counterparts, the heike shamisen has three strings, a slender neck, a body taut with skin, and it is plucked with a plectrum called a bachi. What is peculiar about the heike shamisen is that it is made particularly for the use in one song, called Heike Ondo, which is a folk song from Shimonoseki, Yamaguchi Prefecture, Japan. As the song calls for a higher range of notes, the heike shamisen is constructed with a shorter neck than conventional shamisen. It