Examination of 4He droplets and droplets containing impurities at zero Kelvin using a density functional approach

Abstract Detailed in this manuscript is a methodology to model ground state properties of 4He droplets at zero pressure and zero Kelvin using a density functional theory of liquid helium. The density functional approach examined here consists of two noted functionals from the literature and corresponding mean field definitions. A mean field and trial density are defined for each system and optimized to self-consistency using a matrix diagonalization technique. Initial calculations of planar slabs are performed and demonstrate reasonable agreement with experiment and with prior studies using density functional theory. Quantum properties of droplets and droplets containing atomic dopants are calculated. Three different He-dopant potentials are examined to test the limits of the functional methods. For each impurity interaction, an average of 12 atoms were found to reside in the first solvation shell with an atomic dopant placed at the droplet center. Maximum densities in the first solvation shell reached those of solid helium as predicted by DF methods

Home Management in Practice

Hospitality is a great part of making a home. Entertaining guests is the homemaker\u27s opportunity to dramatize her chosen career, and to share the fine qualities of this home she has created with others

Investing in the Civic Economy: Social Capital and Choice Neighborhoods

Concentrated poverty in inner-city neighborhoods in the United States generates social disorganization and isolation, limiting residents’ access to opportunities for upward mobility. Place-based concentration effects can be detrimental to individual health outcomes and overall community health. Communities require assets and resources across multiple types of capital, and in particular social capital, in order to foster a thriving civic economy. The purpose of this research was to provide a foundation through the study of social capital for pursuing strategic actions to foster a thriving civic economy for residents in a low-wealth neighborhood in Shreveport, Louisiana, that was also the focus of a Choice Neighborhoods planning initiative. A community-engaged research approach was used to examine relationships between neighborhood revitalization planning, resident engagement, social capital, collaboration and openness to transformation in this mixed-methods study. This examination included cognitive and structured social capital constructs on the following five dimensions: trust, reciprocal relationships, social cohesion, social ties and civic engagement. Results of this research suggest empowerment, collaboration and civic engagement are critical building blocks for trust, social capital and community transformation. Additionally, relative social class effects in low wealth communities may exist, whereas people with the fewest resources may be more likely to experience a sense of institutional disengagement and a higher degree of powerlessness, which should be further examined. Further, it is recommended that policymakers and practitioners continue to improve processes to develop social capital and build trust, foster collaborative conditions, and invest in strategies to facilitate meaningful resident engagement in community change efforts in order to build healthy communities

The popular ballad and oral tradition

I begin with a representative quotation from volume 2 of the Papers of Francis James Child because it offers an ideal avenue into the study of the popular ballad and some of the premises of that study: "These two ballads and a fragment of a third were repeated from memory by my grandmother, who is over ninety years old. She learned them orally and has no recollection of their being printed" (II:229). Such a formulation suggests that popular ballads to be authentic and true are held in memory, are unpublished, are learned orally; they are possessions of the past and we get glimpses of that past largely through the memories of the old. It is an easy move from these assertions to suggest that the ballads belong, certainly originated, in the past, in an oral society, homogeneous and small; what we now have is but a pale reflection of their original glory; their time is past.Not