811 research outputs found
Inflaton Particles in Reheating
In many theories of reheating starting from the classical spatially
homogeneous inflaton field, its accompanying inhomogeneous part (which arises
from primordial quantum fluctuations) is treated as a first order perturbation.
We examine some consequences of treating it non-perturbatively in a model where
a first order treatment is invalid. In particular we consider effects on the
long-wavelength curvature parameter relevant to the cosmic microwave background
fluctuations.Comment: 14 pages, 4 figures;code corrected,figures and some conclusions
change
Critical media literacy approaches to violence prevention: A research note
Sexual violence is a global phenomenon needing sustainable interventions. The article extends findings from media literacy scholars by exploring ways that critical media literacy (CML) pedagogies can be used to teach affirmative consent education for the purposes of violence prevention. The article is not a curriculum blue-print, as the pedagogies are still being piloted for adolescents in Ontario. However, the rationales for bridging consent education and critical media literacy apply transnationally. Engaging educators and students with critical analysis of media and creative media production is key to transformative learning about consent, within and beyond the classroom. The article ends by outlining methods that will be used to test the hypothesis that a CML approach rooted in social justice frameworks and best practices in violence prevention will improve the way affirmative consent is taught to adolescents
Human response to vibration in residential environments (NANR209), executive summary
The aim of the Defra-funded project NANR209 ‘Human response to vibration in residential environments’ was to develop exposure-response relationships for vibration experienced in residential environments from sources outside of the residents’ control. The project was performed at the University of Salford between January 2008 and March 2011. The final report was published on the Defra website on 6th September 2012.
The NANR209 Final Report consists of the following documents:
• Executive summary
• Final project report
• Technical report 1: Measurement of vibration exposure
• Technical report 2: Measurement of response
• Technical report 3: Calculation of vibration exposure
• Technical report 4: Measurement and calculation of noise exposure
• Technical report 5: Analysis of the social survey findings
• Technical report 6: Determination of exposure-response relationships
This document is the Executive summary
An Exact Calculation of the Energy Density of Cosmological Gravitational Waves
In this paper we calculate the Bogoliubov coefficients and the energy density
of the stochastic gravitational wave background for a universe that undergoes
inflation followed by radiation domination and matter domination, using a
formalism that gives the Bogoliubov coefficients as continous functions of
time. By making a reasonable assumption for the equation of state during
reheating, we obtain in a natural way the expected high frequency cutoff in the
spectral energy density.Comment: 12 pages+5 figures, uuencoded file,DF/IST-2.9
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