Roof Nesting Oystercatchers

Breeding and Foraging Ecology of American Oystercatchers in the Cape Romain Region, South Carolina

The majority of American Oystercatchers (Haematopus palliatus) in South Carolina make their nests on narrow, elevated mounds of oyster shells deposited naturally along the edges of bays by storms or formed artificially by boat wakes along the Atlantic Intracoastal Waterway (AICW). I compared reproductive success of American Oystercatchers nesting along the AICW with those nesting on naturally f...

Roof Rats

Retractable roof structures

j This paper presents a new concept for retractable roof structures. The new structures consist of a foldable lattice of beams connected by cylindrical joints, to which covering panels or membranes are attached. These structures fold towards their perimeter and there is practically no limit to their shape. Solutions to the key problems that have to be solved in the course of the kinematic desig...

Generalized roof duality

The roof dual bound for quadratic unconstrained binary optimization is the basis for several methods for efficiently computing the solution to many hard combinatorial problems. It works by constructing the tightest possible lower-bounding submodular function, and instead of minimizing the original objective function, the relaxation is minimized. However, for higher-order problems the technique ...

Herring Gulls Nesting in Artificial Goose-nesting Structures

Herring gull (Larus argentatus) nesting in artificial goose-nesting structures was documented at the Winous Point Shooting Club, Port Clinton, Ohio, 1974—78. Gulls and Canada geese (Branta canadensis) nested in 14—28% and 12—23% of the structures, respectively. Gulls nesting in the structures did not influence goose nesting. Clutch sizes and egg-laying dates were synchronous with other local po...