Reflecting on the 'international group working experience': a study of two MBA programmes

This study explores students' experiences of group working in an internationalising MBA context using the research perspectives of postcolonialism (Spivak 1993, Prasad 2003) and critical management education (Reynolds 1997, 1999, Currie and Knights 2003). Data are drawn from interviews with 30 full-time MBA students at two leading UK business schools. Students' perceived gains from the international group-working experience and areas of concern, such as practices of exclusion and domination that occur in the group-working process and a reluctance to talk about and reflect on their group-work experiences, are identified. By comparing international group-working experiences at the two case-study institutions helpful practices concerning organisation of group-work and induction are identified. The paper considers ways in which group work could be made more inclusive and how students can make the most of being in an international environment. Recommendations are made for future course design, including more induction focusing on modes of participation and cultural differences, specific induction to group working including the examination of language and behaviours and the use of critical dialogue and debriefing in making sense of the experience. The paper concludes that assumptions around the benefits of group working need re-visiting within the international context and training is needed of students and staff alike on how to make group work a more beneficial and enjoyable experience for all concerned

Assessing the contribution of Centaur impacts to ice giant luminosities

Voyager 2 observations revealed that the internal luminosity of Neptune is an order of magnitude higher than that of Uranus. If the two planets have similar interior structures and cooling histories, the luminosity of Neptune can only be explained by invoking some energy source beyond gravitational contraction. This paper investigates whether Centaur impacts could provide the energy necessary to produce the luminosity of Neptune. The major findings are (1) that impacts on both Uranus and Neptune are too infrequent to provide luminosities of order the observed value for Neptune, even for optimistic impact-rate estimates, and (2) that Uranus and Neptune rarely have significantly different impact-generated luminosities at any given time. Uranus and Neptune most likely have structural differences that force them to cool and contract at different rates.Comment: 19 pages, including 4 figures. Accepted for publication in Icaru

Nursing education and regulation: international profiles and perspectives

This review of nurse education and regulation in selected OECD countries forms part of ongoing work on contemporary nursing careers and working lives, based at the National Nursing Research Unit, King’s College London. The review was commissioned by the Department of Health to inform their work in considering the UK’s position in relation to the Bologna declaration and changes that may emanate from the implementation of Modernising Nursing Careers (DH 2006). While much of the information in the review was obtained from publications and websites, we also contacted key personnel in most of the countries included for an up-to-date review of developments in their country and would like to thank them all for providing this information

Detection of Low Mass-ratio Stellar Binary Systems

O- and B-type stars are often found in binary systems, but the low binary mass-ratio regime is relatively unexplored due to observational difficulties. Binary systems with low mass-ratios may have formed through fragmentation of the circumstellar disk rather than molecular cloud core fragmen- tation. We describe a new technique sensitive to G- and K-type companions to early B stars, a mass-ratio of roughly 0.1, using high-resolution, high signal-to-noise spectra. We apply this technique to a sample of archived VLT/CRIRES observations of nearby B-stars in the CO bandhead near 2300 nm. While there are no unambiguous binary detections in our sample, we identify HIP 92855 and HIP 26713 as binary candidates warranting follow-up observations. We use our non-detections to determine upper limits to the frequency of FGK stars orbiting early B-type primaries.Comment: 13 pages, 7 figures Accepted to the Astrophysical Journa

A Correlation Between the Eclipse Depths of Kepler Gas Giant Candidates and the Metallicities of their Parent Stars

Previous studies of the interior structure of transiting exoplanets have shown that the heavy element content of gas giants increases with host star metallicity. Since metal-poor planets are less dense and have larger radii than metal-rich planets of the same mass, one might expect that metal-poor stars host a higher proportion of gas giants with large radii than metal-rich stars. Here I present evidence for a negative correlation at the 2.3-sigma level between eclipse depth and stellar metallicity in the Kepler gas giant candidates. Based on Kendall's tau statistics, the probability that eclipse depth depends on star metallicity is 0.981. The correlation is consistent with planets orbiting low-metallicity stars being, on average, larger in comparison with their host stars than planets orbiting metal-rich stars. Furthermore, since metal-rich stars have smaller radii than metal-poor stars of the same mass and age, a uniform population of planets should show a rise in median eclipse depth with [M/H]. The fact that I find the opposite trend indicates that substantial changes in gas giant interior structure must accompany increasing [M/H]. I investigate whether the known scarcity of giant planets orbiting low-mass stars could masquerade as an eclipse depth-metallicity correlation, given the degeneracy between metallicity and temperature for cool stars in the Kepler Input Catalog. While the eclise depth-metallicity correlation is not yet on firm statistical footing and will require spectroscopic [Fe/H] measurements for validation, it is an intriguing window into how the interior structure of planets and even the planet formation mechanism may be changing with Galactic chemical evolution.Comment: Accepted for publication in the Astrophysical Journal. 13 pages total, including 6 text pages, 5 figures and 2 table

Brexiting CMS

Brexit could be seen as the largest popular rebellion against the power elites in the UK modern history. It is also part of a larger phenomenon – the resurgence of nationalism and right-wing politics within Europe, the United States and beyond. Bringing in its wake the worrying manifestations of racism, xenophobia and anti-intellectualism, Brexit and its consequences should be a core concern for Critical Management Studies academics in helping to shape post-Brexit societies, organisations and workplaces, and in fighting and challenging the sinister forces that permeate them. In this paper, we consider how CMS can rise to the challenges and possibilities of this ‘phenomenon-in-the-making’. We reflect on the intellectual tools available to CMS researchers and the ways in which they may be suited to this task. In particular, we explore how the key positions of anti-performativity, critical performativity, political performativity, and public CMS can be used as a starting point for thinking about the potential relevance of CMS in Brexit and post-Brexit contexts. Our intention is to encourage CMS-ers to contribute positively to the post-Brexit world in academic as well as personal capacities. For this, we argue that a new public CMS is needed, which would 1) be guided by the premise that we have no greater and no lesser right than anyone else to shape the world, 2) entail as much critical reflexivity in relation to our unintended performativities as our intended ones, and 3) be underpinned by marginalism as a critical political project

Photophoresis boosts giant planet formation

In the core accretion model of giant planet formation, a solid protoplanetary core begins to accrete gas directly from the nebula when its mass reaches about 5 earth masses. The protoplanet has at most a few million years to reach runaway gas accretion, as young stars lose their gas disks after 10 million years at the latest. Yet gas accretion also brings small dust grains entrained in the gas into the planetary atmosphere. Dust accretion creates an optically thick protoplanetary atmosphere that cannot efficiently radiate away the kinetic energy deposited by incoming planetesimals. A dust-rich atmosphere severely slows down atmospheric cooling, contraction, and inflow of new gas, in contradiction to the observed timescales of planet formation. Here we show that photophoresis is a strong mechanism for pushing dust out of the planetary atmosphere due to the momentum exchange between gas and dust grains. The thermal radiation from the heated inner atmosphere and core is sufficient to levitate dust grains and to push them outward. Photophoresis can significantly accelerate the formation of giant planets.Comment: accepted in Astronomy and Astrophysics, 201

Correcting For Telluric Absorption: Methods, Case Studies, And Release Of The TelFit Code

Ground-based astronomical spectra are contaminated by the Earth's atmosphere to varying degrees in all spectral regions. We present a Python code that can accurately fit a model to the telluric absorption spectrum present in astronomical data, with residuals of similar to 3%-5% of the continuum for moderately strong lines. We demonstrate the quality of the correction by fitting the telluric spectrum in a nearly featureless A0V star, HIP 20264, as well as to a series of dwarf M star spectra near the 819 nm sodium doublet. We directly compare the results to an empirical telluric correction of HIP 20264 and find that our model-fitting procedure is at least as good and sometimes more accurate. The telluric correction code, which we make freely available to the astronomical community, can be used as a replacement for telluric standard star observations for many purposes.UT Austin Hutchinson fellowshipUniversity of TexasAstronom