Chemical weathering and provenance evolution of Holocene–Recent sediments from the Western Indus Shelf, Northern Arabian Sea inferred from physical and mineralogical properties

We present a multi-proxy mineral record based on X-ray diffraction and diffuse reflectance spectrophotometry analysis for two cores from the western Indus Shelf in order to reconstruct changing weathering intensities, sediment transport, and provenance variations since 13 ka. Core Indus-10 is located northwest of the Indus Canyon and exhibits fluctuations in smectite/(illite + chlorite) ratios that correlate with monsoon intensity. Higher smectite/(illite + chlorite) and lower illite crystallinity, normally associated with stronger weathering, peaked during the Early–Mid Holocene, the period of maximum summer monsoon. Hematite/goethite and magnetic susceptibility do not show clear co-variation, although they both increase at Indus-10 after 10 ka, as the monsoon weakened. At Indus-23, located on a clinoform just west of the canyon, hematite/goethite increased during a period of monsoon strengthening from 10 to 8 ka, consistent with increased seasonality and/or reworking of sediment deposited prior to or during the glacial maximum. After 2 ka terrigenous sediment accumulation rates in both cores increased together with redness and hematite/goethite, which we attribute to widespread cultivation of the floodplain triggering reworking, especially after 200 years ago. Over Holocene timescales sediment composition and mineralogy in two localities on the high-energy shelf were controlled by varying degrees of reworking, as well as climatically modulated chemical weathering

Phase 1 Research Report on the IMPRESS Health 2 (Interreg IVA Channel Programme) Project 4282: Understanding the factors behind the late testing and diagnosis of HIV

This report outlines Phase 1 data from an EU Interreg IVA Channel Programme funded research project (Number 4282) conducted to understand factors behind the late testing and diagnosis of HIV in Kent and Medway (UK). The views of patients or service users (n=37) and health care professionals (n=16) on the barriers to early HIV testing and diagnosis were elicited in a series of semi-structured interviews across three organisations providing HIV testing in Kent and Medway between January and March 2014. A retrospective analysis of all patients diagnosed with HIV between January 2008 and December 2013 (n=242) in those centres was also conducted to identify the proportion of early and late presenters in each organisation and identify any correlating factors which may have impacted upon an individual's likelihood of being diagnosed late (i.e. with a CD4 count <350). Chief among the recommendations for a Phase 2 intervention study were the need for improved education and training of healthcare staff (particularly in primary care) to elicit individual's concerns about HIV risk and address stereotypical ideas that it is a condition which predominantly affects men who have sex with men or particular immigrant populations. The data showed that white heterosexuals, and in particular, white women were at particular risk of having their HIV diagnosed late in the region. The second recommendation for immediate action was the need for a concerted social media and public health campaign aimed at 'atypical' HIV patient groups in order to raise awareness of HIV transmission risk and the benefits of early testing and diagnosis

Tawney and the third way

From the 1920s to the 1950s R. H. Tawney was the most influential socialist thinker in Britain. He articulated an ethical socialism at odds with powerful statist and mechanistic traditions in British socialist thinking. Tawney's work is thus an important antecedent to third way thinking. Tawney's religiously-based critique of the morality of capitalism was combined with a concern for detailed institutional reform, challenging simple dichotomies between public and private ownership. He began a debate about democratizing the enterprise and corporate governance though his efforts fell on stony ground. Conversely, Tawney's moralism informed a whole-hearted condemnation of market forces in tension with both his concern with institutional reform and modern third way thought. Unfortunately, he refused to engage seriously with emergent welfare economics which for many social democrats promised a more nuanced understanding of the limits of market forces. Tawney's legacy is a complex one, whose various elements form a vital part of the intellectual background to current third way thinking

Lagrangian filtered density function for LES-based stochastic modelling of turbulent dispersed flows

The Eulerian-Lagrangian approach based on Large-Eddy Simulation (LES) is one of the most promising and viable numerical tools to study turbulent dispersed flows when the computational cost of Direct Numerical Simulation (DNS) becomes too expensive. The applicability of this approach is however limited if the effects of the Sub-Grid Scales (SGS) of the flow on particle dynamics are neglected. In this paper, we propose to take these effects into account by means of a Lagrangian stochastic SGS model for the equations of particle motion. The model extends to particle-laden flows the velocity-filtered density function method originally developed for reactive flows. The underlying filtered density function is simulated through a Lagrangian Monte Carlo procedure that solves for a set of Stochastic Differential Equations (SDEs) along individual particle trajectories. The resulting model is tested for the reference case of turbulent channel flow, using a hybrid algorithm in which the fluid velocity field is provided by LES and then used to advance the SDEs in time. The model consistency is assessed in the limit of particles with zero inertia, when "duplicate fields" are available from both the Eulerian LES and the Lagrangian tracking. Tests with inertial particles were performed to examine the capability of the model to capture particle preferential concentration and near-wall segregation. Upon comparison with DNS-based statistics, our results show improved accuracy and considerably reduced errors with respect to the case in which no SGS model is used in the equations of particle motion

Governance, community participation and urban regeneration : a new role for third sector partners?

Partnership and participation are terms at the centre of current urban regeneration policy initiatives in the UK. The modernising local government agenda has seen a significant shift towards placing greater emphasis on the role of partnerships, and voluntary and community organisations (VCOs) (often referred to collectively as the third sector) are recognised as a key partner in this process. This research conceptualises the third sector within local governance by examining partnership working as a form of community governance. This involves exposing the power relations that underpin such a form of governance in the context of recent urban regeneration initiatives. The research examines two case studies of on-going exercises in community participation within Local Strategic Partnerships in London, the Haringey Community Empowerment Network and the Enfield Community Empowerment Network, in order to interpret how attempts to incorporate the VCO sector in urban regeneration policy in these two areas has unfolded. Through analysis of the policy implementation process as seen in the experience and judgements of key VCO actors involved, what is discovered is that VCOs are embedded in the process and exercise influence, but this influence is "selective" and "focussed", exerted at different levels in the structures and impacted upon by the capacities of VCOs. Findings also demonstrate that not all VCOs wish to be actively engaged in the same way and that new roles in service delivery for VCOs create operational difficulties for the sector. Local conditions relating to socioeconomic factors and local political subcultures play an important role in determining outcomes, which are in fact highly differentiated in the two adjacent areas. Local political conditions are seen to relate to ongoing "discourses" of local governance in terms of "agonistic" and "good bureaucracy" debates as well as theories of power.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Transcritical flow of a stratified fluid over topography: analysis of the forced Gardner equation

Transcritical flow of a stratified fluid past a broad localised topographic obstacle is studied analytically in the framework of the forced extended Korteweg--de Vries (eKdV), or Gardner, equation. We consider both possible signs for the cubic nonlinear term in the Gardner equation corresponding to different fluid density stratification profiles. We identify the range of the input parameters: the oncoming flow speed (the Froude number) and the topographic amplitude, for which the obstacle supports a stationary localised hydraulic transition from the subcritical flow upstream to the supercritical flow downstream. Such a localised transcritical flow is resolved back into the equilibrium flow state away from the obstacle with the aid of unsteady coherent nonlinear wave structures propagating upstream and downstream. Along with the regular, cnoidal undular bores occurring in the analogous problem for the single-layer flow modeled by the forced KdV equation, the transcritical internal wave flows support a diverse family of upstream and downstream wave structures, including solibores, rarefaction waves, reversed and trigonometric undular bores, which we describe using the recent development of the nonlinear modulation theory for the (unforced) Gardner equation. The predictions of the developed analytic construction are confirmed by direct numerical simulations of the forced Gardner equation for a broad range of input parameters.Comment: 34 pages, 24 figure

Research examples from the Sidney De Haan Research Centre for Arts and Health

The poster represents four major areas of the Centre's work: Singing for wellbeing; Dance and health; Cultural value; and Disseminatio

Thermochronology of the modern Indus River bedload: New insight into the controls on the marine stratigraphic record

The Indus River is the only major drainage in the western Himalaya and delivers a long geological record of continental erosion to the Arabian Sea, which may be deciphered and used to reconstruct orogenic growth if the modern bedload can be related to the mountains. In this study we collected thermochronologic data from river sediment collected near the modern delta. U-Pb ages of zircons spanning 3 Gyr show that only ∼5% of the eroding crust has been generated since India-Asia collision. The Greater Himalaya are the major source of zircons, with additional contributions from the Karakoram and Lesser Himalaya. The 39Ar/40Ar dating of muscovites gives ages that cluster between 10 and 25 Ma, differing from those recorded in the Bengal Fan. Biotite ages are generally younger, ranging 0–15 Ma. Modern average exhumation rates are estimated at ∼0.6 km/m.y. or less, and have slowed progressively since the early Miocene (∼20 Ma), although fission track (FT) dating of apatites may indicate a recent moderate acceleration in rates since the Pliocene (∼1.0 km/m.y.) driven by climate change. The 39Ar/40Ar and FT techniques emphasize the dominance of high topography in controlling the erosional flux to the ocean. Localized regions of tectonically driven, very rapid exhumation (e.g., Nanga Parbat, S. Karakoram metamorphic domes) do not dominate the erosional record