Assessing the economic importance of commercial fisheries in the Mid-Atlantic region: a user\u27s guide to the Mid-Atlantic input/output model

The Mid-Atlantic input/output (I/O) model is designed to estimate the economic impacts associated with the harvesting of fish1 by commercial fishermen whose landings occur in a six-state region stretching from New York to North Carolina. These impacts are expressed in terms of employment (annual average jobs—both full and part-time jobs), labor income, and output (sales by U.S. businesses). In addition to generating estimates of economic impacts for the Mid-Atlantic region, the model estimates these impacts for 12 subregions within this region. The subregions are defined by counties within the six-state Mid-Atlantic region. Individual states have from one to three subregions. All subregions are contained within individual states; no subregion crosses state boundaries. Economic impacts are also estimated for 14 gear types. These gear-types account for all commercially landed fish in the Mid-Atlantic region

NACA Advanced Restricted Reports

Report presenting comparisons between the approximate substitute single-stringer method of shear-lag analysis and the exact solutions, which indicate that for beams of practical proportions the approximate method yields a value for the maximum root stress that exceeds the value obtained by use of the exact solution by less than 10 percent

NACA Technical Notes

Report presenting a recurrence formula for the stress analysis of reinforced circular cylinders loaded in the planes of their rings. Deformations of rings and sheet are considered in the analysis

NACA Technical Notes

Report presenting charts with coefficients for the stress analysis of a reinforced circular cylinder. They allow for the rapid determination of sheer flows and direct stresses in the sheet of a cylinder as well as the shear forces, axial forces, and bending moments in the rings. Separate charts are also given for three basic ring loadings

NACA Advanced Restricted Reports

Report presenting several methods of computing bending moments in helicopter rotor blades in the plane of flapping, and the results of a numerical example analyzed by four different methods are compared. The effect of computed bending moments of the tip-loss correction introduced by Wheatley is also considered