This article develops an enhanced UHPC-grout shear connection for steel-concrete composite bridges with precast decks. The primary improvement is the use of ultra-high performance concrete (UHPC) as grout. To validate constructability and mechanical new connection, two series experimental tests (including grouting push-out tests) were conducted. Results from show that both pressure method self-...

Lippert, T., K. Schilling and N. Petkov, Quark propagator on the Connection Machine, Parallel Computing 18 (1992) 1291-1299. The computation of the fermion propagator in lattice Quantum Chromodynamics requires the solution of a large system of linear equations. We discuss and compare the structure, implementation and performance of two linear equation solvers, the Jacobi algorithm and the Conju...

According to the composite-stimulus control model (Weiss, 1969, 1972b), an individual discriminative stimulus (S(D)) is composed of that S(D)'s on-state plus the off-states of all other relevant S(D)s. The present experiment investigated the reversibility of composite-stimulus control. Separate groups of rats were trained to lever-press for food whenever a tone or a light S(D) was present. For ...