1,892 research outputs found
Exploring Thermal Processing of the Mildly Aqueously Altered Cm2 Eet 96029 Using Sulphide Mineralogy and Carbon Structure [abstract]
No abstract available
Negotiating sexuality and masculinity in school sport: An autoethnography
This autoethnography explores challenging and ethically sensitive issues around sexual orientation, sexual identity and masculinity in the context of school sport. Through storytelling, I aim to show how sometimes ambiguous encounters with heterosexism, homophobia and hegemonic masculinity through sport problematise identity development for young same-sex attracted males. By foregrounding personal embodied experience, I respond to an absence of stories of gay and bisexual experiences among males in physical education and school sport, in an effort to reduce a continuing sense of Otherness and difference regarding same-sex attracted males. I rely on the story itself to express the embodied forms of knowing that inhabit the experiences I describe, and resist a finalising interpretation of the story. Instead, I offer personal reflections on particular theoretical and methodological issues which relate to both the form and content of the story
Reflections on a degree initiative: the UK's Birmingham Royal Ballet dancers enter the University of Birmingham
This paper provides an opportunity to share experiences and perceptions of the first 5 years of a degree programme for professional dancers. A partnership developed in the mid-1990s between the UK's Birmingham Royal Ballet and the University of Birmingham, Westhill (now School of Education), to provide a part-time, post-experience, flexible study programme for full-time Company dancers. This is the first 'company customised' higher education programme to dovetail studies around rehearsal, performance and touring schedules. Methodology is based on a narrative by the author, informed by ongoing internal and external evaluations, in-depth interviews with dancers and Company managers, documentation and secondary sources. Outcomes indicate that the programme has made a positive difference to the Company, to the dancers and to the wider education and dance/arts world
Single-Shot Electron Diffraction using a Cold Atom Electron Source
Cold atom electron sources are a promising alternative to traditional
photocathode sources for use in ultrafast electron diffraction due to greatly
reduced electron temperature at creation, and the potential for a corresponding
increase in brightness. Here we demonstrate single-shot, nanosecond electron
diffraction from monocrystalline gold using cold electron bunches generated in
a cold atom electron source. The diffraction patterns have sufficient signal to
allow registration of multiple single-shot images, generating an averaged image
with significantly higher signal-to-noise ratio than obtained with unregistered
averaging. Reflection high-energy electron diffraction (RHEED) was also
demonstrated, showing that cold atom electron sources may be useful in
resolving nanosecond dynamics of nanometre scale near-surface structures.Comment: This is an author-created, un-copyedited version of an article
published in Journal of Physics B: Atomic, Molecular and Optical Physics. IOP
Publishing Ltd is not responsible for any errors or omissions in this version
of the manuscript or any version derived from it. The Version of Record is
available online at http://dx.doi.org/10.1088/0953-4075/48/21/21400
Selected solid-state behaviour of three di-tert-butyl-substituted N-salicylideneaniline derivatives: temperature-induced phase transitions and chromic behaviour
The synthesis, single-crystal structures and chromic behaviour of three related Schiff bases, namely, (E)-2,4-di-tert-butyl-6-{[(4-fluoroÂphenÂyl)imino]ÂmethÂyl}phenol, C21H26FNO, 1, (E)-2,4-di-tert-butyl-6-{[(4-chloroÂphenÂyl)imino]ÂmethÂyl}phenol, C21H26ClNO, 2, and (E)-6-{[(4-bromoÂphenÂyl)imino]ÂmethÂyl}-2,4-di-tert-butylÂphenol, C21H26BrNO, 3, are reported. Two polymorphs of 1 were obtained, which were found to have different photochromic properties. Schiff bases 2 and 3 were found to be isostructural and underwent a phase transition upon cooling which was attributed to the dynamic disorder in one of the tert-butyl groups resolving at low temperature. All of the structures were found to exist in the enol rather than the keto form based on the CâO(H) and imine C=N bond lengths, and contained an intraÂmolecular OâHâŻN hydrogen bond alongside weaker interÂmolecular CâHâŻO contacts
(E)-4-Bromo-2-[(phenylimino)methyl]phenol: a new polymorph and thermochromism
A new polymorph of (E)-4-bromo-2-[(phenylimino)methyl]phenol, C13H10Br-NO, is reported, together with a low-temperature structure determination of thepreviously published polymorph. Both polymorphs were found to have anintramolecular OâHN hydrogen bond between the phenol OH group andthe imine N atom, forming an S (6) ring. The crystals were observed to havedifferent colours at room temperature, with the previously published polymorphbeing more orange and the new polymorph more yellow. The planarity of themolecule in the two polymorphs was found to be signiïŹcantly different, withdihedral angles () between the two aromatic rings for the previously publishedâorangeâ polymorph of = 1.8 (2)at 120 K, while the new âyellowâ polymorphhad = 45.6 (1)at 150 K. It was also observed that both polymorphs displayedsome degree of thermochromism and upon cooling the âorangeâ polymorphbecame more yellow, while the âyellowâ polymorph became paler upon cooling
'Working outâ identity: distance runners and the management of disrupted identity
This article contributes fresh perspectives to the empirical literature on the sociology of the body, and of leisure and identity, by analysing the impact of long-term injury on the identities of two amateur but serious middle/long-distance runners. Employing a symbolic interactionist framework,and utilising data derived from a collaborative autoethnographic project, it explores the role
of âidentity workâ in providing continuity of identity during the liminality of long-term injury and
rehabilitation, which poses a fundamental challenge to athletic identity. Specifically, the analysis
applies Snow and Andersonâs (1995) and Perinbanayagamâs (2000) theoretical conceptualisations
in order to examine the various forms of identity work undertaken by the injured participants, along
the dimensions of materialistic, associative and vocabularic identifications. Such identity work was
found to be crucial in sustaining a credible sporting identity in the face of disruption to the running
self, and in generating momentum towards the goal of restitution to full running fitness and reengagement
with a cherished form of leisure.
KEYWORDS: identity work, symbolic interactionism, distance running, disrupted identit
Vacancies, disorder-induced smearing of the electronic structure, and its implications for the superconductivity of anti-perovskite MgCNi
The anti-perovskite superconductor MgCNi was studied using
high-resolution x-ray Compton scattering combined with electronic structure
calculations. Compton scattering measurements were used to determine
experimentally a Fermi surface that showed good agreement with that of our
supercell calculations, establishing the presence of the predicted hole and
electron Fermi surface sheets. Our calculations indicate that the Fermi surface
is smeared by the disorder due to the presence of vacancies on the C and Ni
sites, but does not drastically change shape. The 20\% reduction in the Fermi
level density-of-states would lead to a significant () suppression
of the superconducting for pair-forming electron-phonon coupling.
However, we ascribe the observed much smaller reduction at our
composition (compared to the stoichiometric compound) to the suppression of
pair-breaking spin fluctuations.Comment: 11 pages, 3 figure
Zirconiumânitrogen intermolecular frustrated Lewis pairs
A series
of intermolecular transition metal frustrated Lewis pairs (FLPs) based
on zirconocene alkoxide complexes ([Cp2ZrÂ(OMes)]+ 1 or ([Cp*2ZrÂ(OMes)]+ 2) with nitrogen Lewis bases (NEt3, NEtiPr2, pyridine, 2-methylpyridine, 2,6-lutidine) are reported.
The interaction between Zr and N depends on the specific derivatives
used, in general more sterically encumbered pairs leading to a more
frustrated interaction; however, DOSY NMR spectroscopy reveals these
interactions to be dynamic in nature. The pairs undergo typical FLP-type
reactivity with D2, CO2, THF, and PhCCD. The
catalytic dehydrocoupling of Me2NH·BH3 is
also reported. Comparisons can be made with previous work employing
phosphines as Lewis bases suggesting that hardâhard or hardâsoft
acidâbase considerations are of little importance compared
to the more prominent roles of steric bulk and basicity
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