We have investigated the depinning process of magnetic flux vortices in twinned crystals of YBa₂Cu₃O₇₋δ in intermediate applied magnetic fields parallel to the crystallographic c axis through precise resistivity measurements before and after fast-neutron irradiation. Of particular interest for each field is the power-law dependence of the electric field on...
This qualitative study examined organizational change including the
necessary steps that a large school district took in planning and implementing a
reform effort. This project told a story of one school district's experience.
The study covered a five year period from 1990 to 1995 in the 30,000 student
Salem-Keizer School...