The expansion of the south-western fisheries in late medieval England
摘要:
This article argues that the expansion of marine fishing in south‐western England from the late fourteenth century to the early sixteenth was part of the maritime sector's critical, but unappreciated, contribution to the rising prosperity of the region. Revenues from fishing represented a substantial supplement to the income of the fisher‐farmers who dominated the industry; promoted employment in ancillary industries such as fish curing; improved the seasonal distribution of maritime work; and stimulated capital investment in ships, nets, and other equipment because of the share system that characterized the division of profits within fishing enterprises. In offering what was probably the chief source of employment within the maritime sector, fishing also provided the ‘nursery of seamen’ so prized by the Tudor navy, and built the navigational experience that underpinned later voyages of exploration.
Disclosed is an optical recording medium comprising a recording layer. The recording layer contains: a charge generation material generating an electron and a hole by light irradiation; a charge transport material transporting one of the electron and the hole; a charge trap which traps the transported one of the electron and the hole to separate the electron and the hole; and a non-linear optical material which changes optical properties of the recording layer in accordance with electric field formed by the electron and the hole being separated from each other. The non-linear optical material has an asymmetrical carbon atom and a cyclic group. Or, it is a cyclic-group-containing constituent having: an inversion symmetric pi-electron system; at least one of an electron donating group and an electron accepting group which are bonded to the inversion symmetric &pgr;-electron system; and an asymmetrical carbon atom.