Don’t mention this around the Christmas table: Brexit, inequality and the demographic divide

A great deal of research has already been conducted on why the UK voted to leave the EU and which groups of voters were most likely to back leave and remain. Danny Dorling, Ben Stuart and Joshua Stubbs present a comprehensive analysis of the vote, writing that although there is generally a stark age divide amongst voters concerning the European Union, the same can also potentially be said for divides in the spread and centralisation of wealth across the UK

Tests of the Accelerating Universe with Near-Infrared Observations of a High-Redshift Type Ia Supernova

We have measured the rest-frame B,V, and I-band light curves of a high-redshift type Ia supernova (SN Ia), SN 1999Q (z=0.46), using HST and ground-based near-infrared detectors. A goal of this study is the measurement of the color excess, E_{B-I}, which is a sensitive indicator of interstellar or intergalactic dust which could affect recent cosmological measurements from high-redshift SNe Ia. Our observations disfavor a 30% opacity of SN Ia visual light by dust as an alternative to an accelerating Universe. This statement applies to both Galactic-type dust (rejected at the 3.4 sigma confidence level) and greyer dust (grain size > 0.1 microns; rejected at the 2.3 to 2.6 sigma confidence level) as proposed by Aguirre (1999). The rest-frame $I$-band light cur ve shows the secondary maximum a month after B maximum typical of nearby SNe Ia of normal luminosi ty, providing no indication of evolution as a function of redshift out to z~0.5. A n expanded set of similar observations could improve the constraints on any contribution of extragalactic dust to the dimming of high-redshift SNe Ia.Comment: Accepted to the Astrophysical Journal, 12 pages, 2 figure

Upper atmospheres and ionospheres of planets and satellites

The upper atmospheres of the planets and their satellites are more directly exposed to sunlight and solar wind particles than the surface or the deeper atmospheric layers. At the altitudes where the associated energy is deposited, the atmospheres may become ionized and are referred to as ionospheres. The details of the photon and particle interactions with the upper atmosphere depend strongly on whether the object has anintrinsic magnetic field that may channel the precipitating particles into the atmosphere or drive the atmospheric gas out to space. Important implications of these interactions include atmospheric loss over diverse timescales, photochemistry and the formation of aerosols, which affect the evolution, composition and remote sensing of the planets (satellites). The upper atmosphere connects the planet (satellite) bulk composition to the near-planet (-satellite) environment. Understanding the relevant physics and chemistry provides insight to the past and future conditions of these objects, which is critical for understanding their evolution. This chapter introduces the basic concepts of upper atmospheres and ionospheres in our solar system, and discusses aspects of their neutral and ion composition, wind dynamics and energy budget. This knowledge is key to putting in context the observations of upper atmospheres and haze on exoplanets, and to devise a theory that explains exoplanet demographics.Comment: Invited Revie

Ultrafast charge dynamics in trap-free and surface-trapping colloidal quantum dots

Ultrafast transient absorption spectroscopy is used to study subnanosecond charge dynamics in CdTe colloidal quantum dots. After treatment with chloride ions, these can become free of surface traps that produce nonradiative recombination. A comparison between these dots and the same dots before treatment enables new insights into the effect of surface trapping on ultrafast charge dynamics. The surface traps typically increase the rate of electron cooling by 70% and introduce a recombination pathway that depopulates the conduction band minimum of single excitons on a subnanosecond timescale, regardless of whether the sample is stirred or flowed. It is also shown that surface trapping significantly reduces the peak bleach obtained for a particular pump fluence, which has important implications for the interpretation of transient absorption data, including the estimation of absorption cross‐sections and multiple exciton generation yields

Racism, anti-racist practice and social work: articulating the teaching and learning experiences of Black social workers

In the mid 1990s a Black practice teacher programme was established in Manchester and Merseyside with the primary aim to increase the number of Black practice teachers in social work organisations, and in turn provide a supportive and encouraging learning environment for Black student social workers whilst on placement. In the north‐west of England research has been undertaken, to establish the quality of the practice teaching and student learning taking place with Black practice teachers and students. This paper is an exploration of the ideas generated within the placement process that particularly focused on the discourse of racism and ant‐racist practice. Black students and practice teachers explain their understanding of racism and anti‐racist practice within social work. From the research, the paper will critique some of the ideas concerning anti‐racism. In particular, it will question whether anti‐racist social work practice needs to be re‐evaluated in the light of a context with new migrants, asylum seekers and refugees. It will concluded, by arguing that whilst the terms anti‐racism, Black and Minority Ethnic have resonance as a form of political strategic essentialism, it is important to develop more positive representations in the future

Overview of Phobos/Deimos Regolith Ion Sample Mission (PRISM) Concept

Far more definitive information on composition is required to resolve the question of origin for the Martian moons Phobos and Deimos. Current infrared spectra of the objects are inconclusive due to the lack of strong diagnostic features.Definitive compositional measurements of Phobos could be obtained using in-situ X-ray, gamma-ray, or neutronspectroscopy or collecting and returning samples to Earth for analysis. We have proposed, in lieu of those methods, toderive Phobos and Deimos compositional data from secondary ion mass spectrometry (SIMS) measurements by calibratingthe instrument to elemental abundance measurements made for known samples in the laboratory. We describe thePhobos/Deimos Regolith Ion Sample Mission (PRISM) concept here. PRISM utilizes a high-resolution TOF plasma composition analyzer to make SIMS measurements by observing the sputtered species from various locations of the moons' surfaces. In general, the SIMS technique and ion mass spectrometers complement and expand quadrupole mass spectrometer measurements by collecting ions that have been energized to higher energies, 50-100 eV, and making measurements at very low densities and pressures. Furthermore, because the TOF technique accepts all masses all the time,it obtains continuous measurements and does not require stepping through masses. The instrument would draw less than10 W and weigh less than 5 kg. The spacecraft, nominally a radiation-hardened 12U CubeSat, would use a low-thrust SolarElectric Propulsion system to send it on a two-year journey to Mars, where it would co-orbit with Deimos and then Phobo

Nonlinear Integer Programming

Research efforts of the past fifty years have led to a development of linear integer programming as a mature discipline of mathematical optimization. Such a level of maturity has not been reached when one considers nonlinear systems subject to integrality requirements for the variables. This chapter is dedicated to this topic. The primary goal is a study of a simple version of general nonlinear integer problems, where all constraints are still linear. Our focus is on the computational complexity of the problem, which varies significantly with the type of nonlinear objective function in combination with the underlying combinatorial structure. Numerous boundary cases of complexity emerge, which sometimes surprisingly lead even to polynomial time algorithms. We also cover recent successful approaches for more general classes of problems. Though no positive theoretical efficiency results are available, nor are they likely to ever be available, these seem to be the currently most successful and interesting approaches for solving practical problems. It is our belief that the study of algorithms motivated by theoretical considerations and those motivated by our desire to solve practical instances should and do inform one another. So it is with this viewpoint that we present the subject, and it is in this direction that we hope to spark further research.Comment: 57 pages. To appear in: M. J\"unger, T. Liebling, D. Naddef, G. Nemhauser, W. Pulleyblank, G. Reinelt, G. Rinaldi, and L. Wolsey (eds.), 50 Years of Integer Programming 1958--2008: The Early Years and State-of-the-Art Surveys, Springer-Verlag, 2009, ISBN 354068274

“You like to be in control of your own destiny to a degree, don't you?”: conscientious autonomy and planning for future care with dementia

Background: We explored people with dementia and their family carers’ experiences of future care planning, guided by Kukla's model of conscientious autonomy. This relational autonomy concept focuses on the alignment of self-managed health-care practices with people’s authentic goals and values. It involves people adopting recommended practices for their own authentic reasons, questioning them where necessary, and being supported by the health and care system to understand their rationale and implement them effectively. Methods: In-depth interviews were conducted with 16 people recently diagnosed with dementia and 31 family carers, purposively and selectively sampled from a large research cohort on the basis of their 'conscientiousness,' using the indicator of already having had informal family conversations about future care. Data were analysed thematically using NVivo software and methods informed by interpretive grounded theory. Findings: Participants sought to feel secure by following recommended practices, manage uncertainty, avoid crises, share burdens within families, and avoid poor end-of-life experiences. However, support was often lacking. Many were unable to speak with specialists and described limited conversations with GPs, leaving them with unaddressed questions. Some described feelings of abandonment. Disease progression was commonly poorly explained, with some participants later encountering information they found confronting. Carers who continued researching the condition felt responsible but under-resourced for discussing disease progression with their relative and believed this should be undertaken by a professional. Formal processes - e.g. Lasting Power of Attorney (LPAs), advance care planning, Do Not Attempt Cardio-Pulmonary Resuscitation (DNACPR) could prompt informal discussions but gaining an overview was difficult, with confusion about how they would be utilised, what information to include and apparent overlap between processes. Misunderstandings about medical and end-of-life decision-making were commonplace. Conclusion: If even those who are most conscientious about planning for future care struggle to access adequate support, others likely face greater challenges. Clearer communication, at an individual and public level, about disease progression, the practical challenges of medical and end-of-life decision-making, and palliative care options is urgently needed. Early group education sessions and communication strategies that engage with existing lay concepts and public discourse are likely to be helpful. Formal care planning processes should be clearer, more streamlined, and better aligned with the practical goals of people with dementia and their family carers

Does exceptional preservation distort our view of disparity in the fossil record?

The effect of missing data on the distances of dinosaur taxa from the morphospace origin. Linear regressions between a taxon’s percentage missing data and its Pythagorean distance from the origin of PCO space on the first two PCO axes. PCO was performed with and without negative eigenvalue correction on raw, Generalised Euclidean (GED), Gower Coefficient (GOW) and Maximum Observable Rescaled (MAX) distance matrices generated from the cladistic matrix of Nesbitt and Ezcurra [42]

Analysis and simulation of the gearshift methodology for a novel two-speed transmission system for electric powertrains with a central motor

Electric vehicle powertrains traditionally consist of a central electric motor drive, a single-speed transmission and a differential. This electric powertrain layout, for use in either fully electric vehicles or through-the-road parallel hybrid electric vehicles, will be extensively adopted in the next few years, despite the ongoing research in electric vehicles with individually controlled motors. However, current research suggests that electric powertrains with a central electric motor drive can still be widely improved. For example, the installation of a seamless multiple-speed transmission instead of a single-speed transmission can cause an increase in the vehicle performance, together with an enhancement in the overall efficiency of the electric powertrain. These novel transmission systems for electric powertrains require a specific design, in order to be efficient, compact, easy and robust to control and cheap to manufacture. This article presents the mechanical layout and the control system of a novel two-speed transmission system designed by the present authors, with particular focus on the achievement of optimal gearshift dynamics. The torque characteristics of typical electric motor drives require a different actuation of the seamless gearshifts, in comparison with the equivalent operation for a dual-clutch transmission within a powertrain driven by an internal combustion engine. </jats:p