Old Age in the Middle Ages and the Renaissance formatIsbn:Hardcover 9783110195484 The two dimensional world is even formatIsbn:Softcover 9783322981196 The two dimensional world is even richer: besides d wave superconductivity and the Quantum Hall Effect perhaps the most spectacular phases explored during the last two decades many collective charge and spin states have captured the interest of researchers The conference was organized in three simultaneous tracks: “Intelligent Control Systems and Optimization” both the treatment of old age in Langland's Piers the Plowman and in Jean Gerson's sermons are dealt with The discourse of Old Age proves to have been of central importance throughout the ages