12,212 research outputs found

    Achieving an "enlightened" publications policy at the University of Glasgow

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    The University of Glasgow has led the way in open access developments since 2001. This article charts the progress of open access at Glasgow through the development of the DAEDALUS Project in 2002 to the launch of the University's repository, Enlighten. Key factors leading to the recent announcement of a mandate for the deposit of research publications are discussed, including the impact of the Research Assessment Exercise and the need for a central publications database at Glasgow

    Measurements of CP violation in B mixing through BJ/ψXB \to J/\psi X decays at LHCb

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    B mesons provide an ideal laboratory for measurements of CP violation and searches for CP violation beyond the Standard Model. Recent measurements of the mixing phases of the Bs0B_s^0 and B0B^0 mesons, ϕs\phi_s and sin2β\sin2\beta, using decays to J/ψXJ/\psi X final states are presented. In view of future improved measurements, a good understanding of pollution from sub-leading penguin topologies in these decays is needed. Those can be probed using suppressed decays like Bs0J/ψKS0B_s^0 \to J/\psi K_S^0 and Bs0J/ψK0B_s^0 \to J/\psi \overline{K}^{*0}. Recent results using these decay modes are presented.Comment: Proceedings for EPS-HEP 2015. Updated introductio

    Implementing electronic theses at the University of Glasgow: Cultural challenges

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    Many UK university libraries are actively engaged in the process of introducing electronic theses to their institutions. This article describes the strategies that have been adopted by staff at Glasgow University Library in trying to implement electronic theses and the challenge that have been faced. The article concludes that a number of lessons have been learned from the experience and presents further strategies that have subsequently been developed. External developments, which may help speed up the transition to electronic theses, are also detailed

    Organizing Dark Matter: W.A.G.E. as Alternative Worker Organization

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    Since its founding in 2008, W.A.G.E. (Working Artists and the Greater Economy) has worked to reform the economic habits of US art institutions and of the artists upon whose cultural work these institutions are dependent. Inside a decade, W.A.G.E. went from a small grassroots collective to an internationally recognized, yet lean, organization, which not only advocates for labour standards in the nonprofit art sector, but also develops practical tools to begin the work of doing better by equality in the art world. This chapter positions W.A.G.E. as an example of what Immanuel Ness terms “new forms of worker organization.” Informed by W.A.G.E.-authored texts, media coverage of W.A.G.E., and interviews with the group’s core organizer and programmer, the chapter surveys W.A.G.E.’s strategies for organizing “dark matter,” a concept that Gregory Sholette has repurposed from physics as a metaphor for the majority of artists and activities that populate the art world and uphold and subsidize its most visible and commercially successful figures. W.A.G.E. is explored in five registers: its practice of parrhesia, algorithm of fairness, strategy of certification, post-horizontalist form of organization, and platformization of labour politics. While W.A.G.E. has been tackling dilemmas specific to the nonprofit arts, its strategies hold wider relevance to confronting the challenge of organizing workers who are outside of an employment relationship, who lack access to unions, and for whom the opportunity to be self-expressive or the promise of exposure may be regarded as compensation enough

    Draft budget 2013/14: higher education

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    Simultaneously constraining the astrophysics of reionisation and the epoch of heating with 21CMMC

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    The cosmic 21 cm signal is set to revolutionise our understanding of the early Universe, allowing us to probe the 3D temperature and ionisation structure of the intergalactic medium (IGM). It will open a window onto the unseen first galaxies, showing us how their UV and X-ray photons drove the cosmic milestones of the epoch of reionisation (EoR) and epoch of heating (EoH). To facilitate parameter inference from the 21 cm signal, we previously developed 21CMMC: a Monte Carlo Markov Chain sampler of 3D EoR simulations. Here we extend 21CMMC to include simultaneous modelling of the EoH, resulting in a complete Bayesian inference framework for the astrophysics dominating the observable epochs of the cosmic 21 cm signal. We demonstrate that second generation interferometers, the Hydrogen Epoch of Reionisation Array (HERA) and Square Kilometre Array (SKA) will be able to constrain ionising and X-ray source properties of the first galaxies with a fractional precision of order 1\sim1-10 per cent (1σ\sigma). The ionisation history of the Universe can be constrained to within a few percent. Using our extended framework, we quantify the bias in EoR parameter recovery incurred by the common simplification of a saturated spin temperature in the IGM. Depending on the extent of overlap between the EoR and EoH, the recovered astrophysical parameters can be biased by 310σ\sim3-10\sigma.Comment: 20 pages, 10 figures, 4 tables. Accepted to MNRAS (matches online version). Movies showing the imprint of the astrophysical parameters on the 21cm signal can be found at http://homepage.sns.it/mesinger/21CMMC.htm

    Moped and motor scooter licensing and training: current approaches and future challenges

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    Unlike some European countries, there have been few motor scooters and mopeds on Australian roads and licensing and training of these riders has received little attention. However, recent increases in the sales of scooters (many of which are officially mopeds) have stimulated interest in how these vehicles can be best managed in Australia. This paper reviews local and international approaches to moped and motor scooter licensing and training, and seeks to assess their relevance to the current Australian situation. A number of challenges to developing a coherent licensing and training system are identified and discussed: lack of information regarding moped and motor scooter safety and about the safety outcomes of current licensing and training systems, the absence of official definitions of scooters worldwide, the significant growth in this market, whether different licensing and training requirements should apply to tourists, and the status of similar vehicles

    Constraints on reionisation from the z=7.5 QSO ULASJ1342+0928

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    The recent detection of ULASJ1342+0928, a bright QSO at z=7.54z=7.54, provides a powerful probe of the ionisation state of the intervening intergalactic medium, potentially allowing us to set strong constraints on the epoch of reionisation (EoR). Here we quantify the presence of Lyα\alpha damping wing absorption from the EoR in the spectrum of ULASJ1342+0928. Our Bayesian framework simultaneously accounts for uncertainties on: (i) the intrinsic QSO emission (obtained from reconstructing the Lyα\alpha profile from a covariance matrix of emission lines) and (ii) the distribution of HII regions during reionisation (obtained from three different 1.63^3 Gpc3^3 simulations spanning the range of plausible EoR morphologies). Our analysis is complementary to that in the discovery paper (Ba\~nados et al.) and the accompanying method paper (Davies et al.) as it focuses solely on the damping wing imprint redward of Lyα\alpha (1218<λ<12301218 < \lambda < 1230\AA), and uses a different methodology for (i) and (ii). We recover weak evidence for damping wing absorption. Our intermediate EoR model yields a volume-weighted neutral hydrogen fraction at z=7.5z=7.5 of xˉHI=0.21+0.170.19\bar{x}_{\rm HI} = 0.21\substack{+0.17 \\ -0.19} (68 per cent). The constraints depend weakly on the EoR morphology. Our limits are lower than those presented previously, though they are consistent at ~1-1.5σ\sigma. We attribute this difference to: (i) a lower amplitude intrinsic Lyα\alpha profile obtained from our reconstruction pipeline, driven by correlations with other high-ionisation lines in the spectrum which are relatively weak; and (ii) only considering transmission redward of Lyα\alpha when computing the likelihood, which reduces the available constraining power but makes the results less model-dependent. Our results are consistent with previous estimates of the EoR history, and support the picture of a moderately extended EoR.Comment: 7 pages, 3 figures. Submitted to MNRAS, comments welcom
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