University of Houston

About: University of Houston is a education organization based out in Houston, Texas, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 23074 authors who have published 53903 publications receiving 1641968 citations.

Rapid oxygen ion diffusion and surface exchange kinetics in PrBaCo2O5+x with a perovskite related structure and ordered A cations

Abstract: As part of an investigation of new cathode materials for intermediate temperature solid oxide fuel cells, we have investigated particular perovskite oxides with ordered A cations which, in turn, localize the oxygen vacancies into layers. The oxygen exchange kinetics of polycrystalline samples of the oxygen-deficient double perovskite PrBaCo2O5+x (PBCO) have been determined by electrical conductivity relaxation (ECR) and by oxygen-isotope exchange and depth profiling (IEDP). The ECR and IEDP measurements reveal that PBCO has high electronic conductivity and rapid oxygen ion diffusion and surface exchange kinetics. Both techniques demonstrate that the oxygen kinetics in this structure type are significantly faster than in corresponding disordered perovskites.

On the Legitimacy of National High Courts

Abstract: The purpose of this research is to examine theories of diffuse support and institutional legitimacy by testing hypotheses about the interrelationships among the salience of courts, satisfaction with court outputs, and diffuse support for national high courts. Like our predecessors, we are constrained by essentially cross-sectional data; unlike them, we analyze mass attitudes toward high courts in eighteen countries. Because our sample includes many countries with newly formed high courts, our cross-sectional data support several longitudinal inferences, using the age of the judicial institution as an independent variable. We discover that the U.S. Supreme Court is not unique in the esteem in which it is held and, like other courts, it profits from a tendency of people to credit it for pleasing decisions but not to penalize it for displeasing ones. Generally, older courts more successfully link specific and diffuse support, most likely due to satisfying successive, nonoverlapping constituencies.

Superconductivity in the high-Tc Bi-Ca-Sr-Cu-O system - Phase identification

Abstract: Four phases are observed in superconducting Bi-Ca-Sr-Cu-O samples. The superconducting phase, with onset temperature near 120 K, is a 15.4-A-layered compound with composition near Bi2Ca1Sr2Cu2O9 and an A-centered orthorhombic unit subcell 5.41 x 5.44 x 30.78 A. X-ray diffraction and electron microscopy data are consistent with a structure of alternating perovskite and Bi2O2 layers. High-resolution transmission electron microscopy images reveal a b-axis superstructure of 27.2 A, numerous (001) stacking faults, and other defects.