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Regional analysis has been accepted as a subdiscipline of economics. The signal importance and outlines of the discipline were perhaps most clearly stated in a survey by Meyer in 1965: He asserted that the most characteristic feature of regional analysis was its pragmatic origin. Regional analytic models seem to have grown out of needs to understand and analyze regional problems, despite significant conceptual and data problems. Conceptually, all classical economic theory is involved. In addition, more modern dimensions of location and equilibrium of multiple economies must be confronted. Data problems are magnified by the spatial dimension, since the accounting series implied for most aggregate analysis is available only on a national basis. (This abstract was borrowed from another version of this item.) more...

All samples processed from February 1973 through January 1974 at the Illinois State Geological Survey Radiocarbon Dating Laboratory are reported here. The benzene liquid scintillation technique was used. Laboratory procedures used were the same as those previously reported by Coleman (1973, 1974). more...

The corrosion behavior of 2A02 Al alloy under 4 mg/cm2 NaCl deposition at different temperatures (from 30 to 80 °C) has been studied. This corrosion behavior was researched using mass-gain, scanning electron microscopy-SEM, laser scanning confocal microscopy-LSCM, X-ray photoelectron spectroscopy-XPS and other techniques. The results showed and revealed that the corrosion was maximal at 60 °C after 200 h of exposure. The increase of temperature not only affected the solubility of oxygen gas in the thin film, but also promoted the transport of ions (such as Cl−), and the formation of protective AlO(OH), which further affects the corrosion speed. more...