Electric current certain materials when cooled below a characteristic critical temperature. It was discovered by Heike Kamerlingh Onnes on April 8, 1911 in Leiden. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the superconductor as it transitions into the superconducting state. The occurrence of the Meissner effect indicates that superconductivity cannot be understood simply as the idealization of "perfect conductivity" in classical physics. In a semiconductor it is sometimes useful to think of the current as due to the flow
Heike Hennig and other cities. On juries and artistic advisory councils, Heike Hennig makes efforts to support contemporary performing art and music. In 2009, Heike Hennig was invited to teach at the University of British Columbia in Vancouver and Kelowna as well as at Simon Fraser University in Burnaby, Canada as a "Guest Speaker" via film, workshop and lectures. Since 2010, Heike Hennig has taught at the Zurich University of the Arts (ZHdK). Heike Hennig Heike Hennig (born 8 November 1966) is a German dancer, choreographer and director of the opera and dance ensemble "Heike Hennig & Co". Heike Hennig had her