1,315 research outputs found
Separated laminar boundary layers
Classical boundary layer theory is inadequate to deal with the problem of flow separation owing to its underlying assumption that the boundary layer has an insignificant effect on the external stream. This difficulty is resolved by a theory which includes interaction with the external flow. This theory is described from the viewpoint of the asymptotic triple deck structure. Several triple deck studies are reviewed with emphasis on results of interest in aeronautical applications
On Volumes of Permutation Polytopes
This paper focuses on determining the volumes of permutation polytopes
associated to cyclic groups, dihedral groups, groups of automorphisms of tree
graphs, and Frobenius groups. We do this through the use of triangulations and
the calculation of Ehrhart polynomials. We also present results on the theta
body hierarchy of various permutation polytopes.Comment: 19 pages, 1 figur
A QM/MM equation-of-motion coupled-cluster approach for predicting semiconductor color-center structure and emission frequencies
Valence excitation spectra are computed for all deep-center silicon-vacancy
defect types in 3C, 4H, and 6H silicon carbide (SiC) and comparisons are made
with literature photoluminescence measurements. Nuclear geometries surrounding
the defect centers are optimized within a Gaussian basis-set framework using
many-body perturbation theory or density functional theory (DFT) methods, with
computational expenses minimized by a QM/MM technique called SIMOMM. Vertical
excitation energies are subsequently obtained by applying excitation-energy,
electron-attached, and ionized equation-of-motion coupled-cluster (EOMCC)
methods, where appropriate, as well as time-dependent (TD) DFT, to small models
including only a few atoms adjacent to the defect center. We consider the
relative quality of various EOMCC and TD-DFT methods for (i) energy-ordering
potential ground states differing incrementally in charge and multiplicity,
(ii) accurately reproducing experimentally measured photoluminescence peaks,
and (iii) energy-ordering defects of different types occurring within a given
polytype. The extensibility of this approach to transition-metal defects is
also tested by applying it to silicon-substitutional chromium defects in SiC
and comparing with measurements. It is demonstrated that, when used in
conjunction with SIMOMM-optimized geometries, EOMCC-based methods can provide a
reliable prediction of the ground-state charge and multiplicity, while also
giving a quantitative description of the photoluminescence spectra, accurate to
within 0.1 eV of measurement in all cases considered.Comment: 13 pages, 4 figures, 6 tables, 5 equations, 100 reference
A Holistic Approach to Promote Sleep for People Emerging from Homelessness: A Good Night’s Rest in Your Nest Sleep Toolkit
Background: Sleep deprivation has been linked to chronic health issues, decreased physical and cognitive functioning, and overall decreased quality of life, which limits the ability to engage in desired tasks and occupations (Gonzalez & Tyminski, 2020). Obtaining restful sleep serves as a foundation for optimal cognitive and physical functioning during daily tasks, roles, and activities (AOTA, 2017). Individuals who have experienced homelessness consistently demonstrate higher rates of sleep inadequacies compared to the general public, highlighting the need for service providers to address the quality of sleep participation for this population (Gonzalez & Tyminski, 2020).
Purpose
• Promote sleep participation for individuals emerging from homelessness • Supply occupational therapy practitioners and other service providers with evidence-based and model-driven materials
• Incorporated into client’s daily routines, habits, and environments.
• Assist clients in establishing healthy bedtime routines, make environmental modifications, and enhance the mind-body-spirit connection
Methods:
• A thorough literature review was completed to determine current interventions approaches, programming types, the role of occupational therapy, and barriers to sleep participation for individuals emerging from homelessness.
• Literature revealed a significant need interventions to promote sleep for individuals emerging from homelessnesshttps://commons.und.edu/frank-low-posters/1001/thumbnail.jp
Gott bin ich, kein Mann. Beiträge zur Hermeneutik der biblischen Gottesrede. [Reseña]
Reseña de Ilona RIEDEL-SPANGENBERGER y Erich
ZENGER (eds.), Gott bin ich, kein Mann.
Beiträge zur Hermeneutik der biblischen
Gottesrede, Verlag Ferdinand Schöningh,
Paderborn-München-Wien-Zürich
2006, 454 pp., 16 x 24, ISBN 3-
506-71385-X
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