Sigelman et al (1995), Williams (1990), and Sonenshein (1990) find that whites stereotype African-American candidates as less competent more liberal than white candidates. Yet increasing numbers of African-Americans win election in constituencies. We used a natural experiment, the media boom for Colin Powell presidential bid 1994, to test degree which various race-related attitudes affected sup...

The Clinch and Powell Rivers (Virginia, USA) support diverse mussel assemblages. Extensive coal mining occurs in both watersheds. In large reaches of both rivers, major ion concentrations are elevated and mussels have been extirpated or are declining. We conducted a laboratory study to assess major ion effects on growth and survival of juvenile Villosa iris. Mussels were exposed to pond water a...

A gas kick simulation model for deep-water horizontal well with diesel-based drilling fluid is presented in this paper. This model is mainly based on the mass, momentum, and energy conservation equations. The unique aspect of this model is the fluid-gas coupling and the change of mud properties after the gas influx from the formation. The simulation results show that the gas in an annulus disso...

Hence, there is an eigenstate |ψ〉 = A|φ〉 of H with this same energy eigenvalue. We could equally well have begun with the statement that H|ψ〉 = E|ψ〉 and then found a state of H given by |φ〉 = A†|ψ〉 with the same energy. Note that a Hamiltonian of the two given forms will have only non-negative eigenvalues: 〈ψ|A†A|ψ〉 = ∣∣|Aψ〉∣∣2 ≥ 0. Equality holds only if the state is annihilated by A. Analogou...

The authors would like to express their appreciation to the following people who contributed greatly to this project. Dr. Nathaniel Alpert, Ph.D., and associates of the Physics Research Division, Department of Radiology for the computer aspects of radionuclide imaging. Mr. William H. Shea, Jr., and Mr. Ronald J. Callahan of the Division of Nuclear Medicine, Department of Radiology, and the tech...