2,111 research outputs found
King Tutankhamun: Bringing Egyptian Culture to America
A review of the impact of three different tours of artifacts from the burial chamber of King Tutankhamun on American culture and knowledge of ancient Egypt
Objectification theory predicts college women’s attitudes toward cosmetic surgery
This study investigated cosmetic surgery attitudes
within the framework of objectification theory. One hundred
predominantlyWhite, British undergraduate women completed
self-report measures of impression management, global selfesteem,
interpersonal sexual objectification, self-surveillance,
body shame, and three components of cosmetic surgery
attitudes. As expected, each of the objectification theory
variables predicted greater consideration of having cosmetic
surgery in the future. Also, as expected, sexual objectification
and body shame uniquely predicted socialmotives for cosmetic
surgery, whereas self-surveillance uniquely predicted intrapersonal
motives for cosmetic surgery. These findings suggest that
women’s acceptance of cosmetic surgery as a way to
manipulate physical appearance can be partially explained by
the degree to which they view themselves through the lenses of
sexual and self-objectification
Spontaneous Octahedral Tilting in the Cubic Inorganic Caesium Halide Perovskites CsSnX and CsPbX (X = F, Cl, Br, I)
The local crystal structures of many perovskite-structured materials deviate
from the average space group symmetry. We demonstrate, from lattice-dynamics
calculations based on quantum chemical force constants, that all the
caesium-lead and caesium-tin halide perovskites exhibit vibrational
instabilities associated with octahedral titling in their high-temperature
cubic phase. Anharmonic double-well potentials are found for zone-boundary
phonon modes in all compounds with barriers ranging from 108 to 512 meV. The
well depth is correlated with the tolerance factor and the chemistry of the
composition, but is not proportional to the imaginary harmonic phonon
frequency. We provide quantitative insights into the thermodynamic driving
forces and distinguish between dynamic and static disorder based on the
potential-energy landscape. A positive band gap deformation (spectral
blueshift) accompanies the structural distortion, with implications for
understanding the performance of these materials in applications areas
including solar cells and light-emitting diodes
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