Superconductivity a better environmental performance but could also improve public acceptance for expansion of the electric grid. Superconductivity Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic flux fields occurring in certain materials, called superconductors, when cooled below a characteristic critical temperature. It was discovered by Dutch physicist 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 during its transitions into the superconducting state. The
Heike Henkel Heike Henkel Heike Henkel (born Heike Redetzky on 5 May 1964) is a German former athlete competing in high jump. She won the high jump gold medal at the 1992 Summer Olympics in Barcelona. Henkel was born in Kiel, Schleswig-Holstein. Having competed for West Germany at the Olympic Games in 1984 and 1988, she emerged as the world's leading female high jumper of the early 1990s. As well as her Olympic triumph, Henkel won World, World Indoor, European and European Indoor titles. She is one of only two female high jumpers in history to have won all five titles, the