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ABSTRACT The particle size distributions (PSDs) of particulate matter (PM) in the downwind plume from simulated sources of a cotton gin were analyzed to determine the impact of PM settling [...]

This article extends understanding of the underground city and the workings of the urban backstage through a critical analysis of water infrastructure maintenance and repair. It is based on analysis of ethnographic work undertaken with water maintenance operatives on-site at 11 water infrastructure repair jobs between 2015 and 2016 in Bristol, England. In this article, we argue that water infrastructure maintenance and repair constitutes an important but largely unrecognised form of care work. We extend existing conceptual work by arguing that nonhumans can be vital participants within practices of care. [ABSTRACT FROM AUTHOR]

This paper studies three sites or 'landscapes of care' in Leeds, Bristol and London where water and associated built and natural environments are used to co-construct and facilitate forms of social and environmental care. Our research narrates the ways in which blue spaces are cultivated for the production of particular forms of caring bodies and sensibilities. Interpreting care as both a doing (caring for) and emotion (caring about), we draw attention to the diverse practices and distributed nature of care in these environments. Our paper has three main insights. First, we draw attention to the role of water as both a material and site of care. Second, we identify a range of more-than-human benefits associated with blue spaces and how these emerge via collaborative, non-linear and reciprocal forms of care. Third, we argue that by understanding how care works in everyday social practice, new forms of ecological care and pro-environmental ways of living with the world can emerge. [ABSTRACT FROM AUTHOR]

Existing measurements of the collision-induced rototranslational absorption spectra of gaseous mixtures of methane with helium, hydrogen, or nitrogen are compared to theoretical calculations, based on refined multipole-induced and dispersion force-induced dipole moments of the interacting molecular pairs CH4–He, CH4–H2, and CH4–N2. In each case the measured absorption exceeds the calculations substantially at most frequencies. We present the excess absorption spectra, that is the difference of the measured and the calculated profiles, of these supramolecular CH4–X systems at various gas temperatures. The excess absorption spectra of CH4–X pairs differ significantly for each choice of the collision partner X, but show common features (spectral intensities and shape) at frequencies from roughly 200 to 500 cm-1. These excess spectra seem to defy modeling in terms of ad hoc exchange force–induced dipole components attempted earlier. We suggest that besides the dipole components induced by polarization in the electric molecular multipole fields and their gradients, and by exchange and dispersion forces, other dipole induction mechanisms exist in CH4–X complexes that presumably are related to collisional distortion of the CH4 molecular frame.© 2005 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Existing measurements of the collision-induced rototranslational absorption spectra of gaseous mixtures of methane with helium, hydrogen, or nitrogen are compared to theoretical calculations, based on refined multipole-induced and dispersion force-induced dipole moments of the interacting molecular pairs CH4–He, CH4–H2, and CH4–N2. In each case the measured absorption exceeds the calculations substantially at most frequencies. We present the excess absorption spectra, that is the difference of the measured and the calculated profiles, of these supramolecular CH4–X systems at various gas temperatures. The excess absorption spectra of CH4–X pairs differ significantly for each choice of the collision partner X, but show common features (spectral intensities and shape) at frequencies from roughly 200 to 500 cm-1. These excess spectra seem to defy modeling in terms of ad hoc exchange force–induced dipole components attempted earlier. We suggest that besides the dipole components induced by polarization in the electric molecular multipole fields and their gradients, and by exchange and dispersion forces, other dipole induction mechanisms exist in CH4–X complexes that presumably are related to collisional distortion of the CH4 molecular frame.© 2005 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Quantum line shape calculations of the rototranslational enhancement spectra of nitrogen-methane gaseous mixtures are reported. The calculations are based on a recent theoretical dipole function for interacting N2 and CH4 molecules, which accounts for the long-range induction mechanisms: multipolar inductions and dispersion force-induced dipoles. Multipolar induction alone was often found to approximate the actual dipole surfaces of pairs of interacting linear molecules reasonably well. However, in the case of the N2-CH4 pair, the absorption spectra calculated with such a dipole function still show a substantial intensity defect at the high frequencies (>250 cm-1) when compared to existing measurements at temperatures from 126 to 297 K, much as was previously reported. © 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR]