Oxidation corrosion resistant superalloys and coatings

An article of manufacture having improved high temperature oxidation and corrosion resistance comprising: (a) a superalloy substrate containing a carbide reinforcing phase, and (b) a coating consisting of chromium, aluminum, carbon, at least one element selected from iron, cobalt or nickel, and optionally an element selected from yttrium or the rare earth elements

Oxidation corrosion resistant superalloys and coatings

An article of manufacture having improved high temperature oxidation and corrosion resistance comprising: (a) a superalloy substrate containing a carbide reinforcing phase, and (b) a coating consisting of chromium, aluminum, carbon, at least one element selected from iron, cobalt or nickel, and optionally an element selected from yttrium or the rare earth elements

Prison Inmate Marriages: A Survey and a Proposal

This comment explores one facet of the issue of inmate civil rights: the right to marry. An analysis will be made of the current situation nationwide with particular emphasis on Virginia, including proposed guidelines for Virginia\u27s Department of Corrections that reflect the current national trend with regard to inmate marriages

Charting Racial Formations in the New U.S. South: Reflections on North Carolina’s Latino, African-American, and Afro-Latino Relations

The term “New South” has been used for over a hundred years to describe and categorize the Southern U.S. The desire to continually reinvent the South suggests that the current transformations of the region’s economy, demographics, and politics are not radical reconfigurations of a monolithic and unchanging landscape, but rather are the latest articulations of a complex and continually evolving region. Change in the South, however, is not a neutral, uncontested process. The South’s meaning is now being challenged in ways that have not been witnessed before. Multiethnic diversity has been identified as one of the key emerging features of the region, particularly in job-laden metropolitan areas. In North Carolina and other Southern States, migration streams are channeling Latinos into areas with relatively large Black populations, and in geographically defined social/political spaces that have been historically discussed in binary terms of Black and White. This essay is a preliminary exploration of these processes of contested change in North Carolina, examining the stakes involved, the processes that have unfurled, and the histories/legacies produced by these interactions that are rapidly becoming prominent features in the American social landscape

BMQ

BMQ: Boston Medical Quarterly was published from 1950-1966 by the Boston University School of Medicine and the Massachusetts Memorial Hospitals

Accretion of Planetary Material onto Host Stars

Accretion of planetary material onto host stars may occur throughout a star's life. Especially prone to accretion, extrasolar planets in short-period orbits, while relatively rare, constitute a significant fraction of the known population, and these planets are subject to dynamical and atmospheric influences that can drive significant mass loss. Theoretical models frame expectations regarding the rates and extent of this planetary accretion. For instance, tidal interactions between planets and stars may drive complete orbital decay during the main sequence. Many planets that survive their stars' main sequence lifetime will still be engulfed when the host stars become red giant stars. There is some observational evidence supporting these predictions, such as a dearth of close-in planets around fast stellar rotators, which is consistent with tidal spin-up and planet accretion. There remains no clear chemical evidence for pollution of the atmospheres of main sequence or red giant stars by planetary materials, but a wealth of evidence points to active accretion by white dwarfs. In this article, we review the current understanding of accretion of planetary material, from the pre- to the post-main sequence and beyond. The review begins with the astrophysical framework for that process and then considers accretion during various phases of a host star's life, during which the details of accretion vary, and the observational evidence for accretion during these phases.Comment: 18 pages, 5 figures (with some redacted), invited revie