New structural approach for determining load carrying capability of filament wound composite materials

Metal lined boron and graphite composites exhibit high strength and minimum weight, making them superior to aluminum cylindrical shell structures and to steel or aluminum constructed pressure vessels. S glass filament-epoxy resin matrix with aluminum liner is suitable for cryogenic tanks

Statistical Analysis Plan: Low Traffic Neighbourhoods in London: Interrupted time series analysis of sensor count data

This document is a statistical analysis plan for the NIHR-funded study into Low Traffic Neighbourhoods in London. It outlines the methodological approach (including data cleaning, anomaly detection, imputation and statistical analysis) associated with automated sensor data collected as part of the project. It gives particular detail to the interrupted time series method that, dependent on data availability and suitability, should form a significant part of the analysis of sensor data

Conditional operation of a spin qubit

We report coherent operation of a singlet-triplet qubit controlled by the arrangement of two electrons in an adjacent double quantum dot. The system we investigate consists of two pairs of capacitively coupled double quantum dots fabricated by electrostatic gates on the surface of a GaAs heterostructure. We extract the strength of the capacitive coupling between qubit and double quantum dot and show that the present geometry allows fast conditional gate operation, opening pathways to multi-qubit control and implementation of quantum algorithms with spin qubits.Comment: related papers here: http://marcuslab.harvard.ed

A return to strong radio flaring by Circinus X-1 observed with the Karoo Array Telescope test array KAT-7

Circinus X-1 is a bright and highly variable X-ray binary which displays strong and rapid evolution in all wavebands. Radio flaring, associated with the production of a relativistic jet, occurs periodically on a ~17-day timescale. A longer-term envelope modulates the peak radio fluxes in flares, ranging from peaks in excess of a Jansky in the 1970s to an historic low of milliJanskys during the years 1994 to 2007. Here we report first observations of this source with the MeerKAT test array, KAT-7, part of the pathfinder development for the African dish component of the Square Kilometre Array (SKA), demonstrating successful scientific operation for variable and transient sources with the test array. The KAT-7 observations at 1.9 GHz during the period 13 December 2011 to 16 January 2012 reveal in temporal detail the return to the Jansky-level events observed in the 1970s. We compare these data to contemporaneous single-dish measurements at 4.8 and 8.5 GHz with the HartRAO 26-m telescope and X-ray monitoring from MAXI. We discuss whether the overall modulation and recent dramatic brightening is likely to be due to an increase in the power of the jet due to changes in accretion rate or changing Doppler boosting associated with a varying angle to the line of sight.Comment: 7 pages, 5 figures, accepted for publication in MNRAS 14 May 201

Synthesis and characterization of biodegradable lignin nanoparticles with tunable surface properties

Lignin nanoparticles can serve as biodegradable carriers of biocidal actives with minimal environmental footprint. Here we describe the colloidal synthesis and interfacial design of nanoparticles with tunable surface properties using two different lignin precursors, Kraft (Indulin AT) lignin and Organosolv (high-purity lignin). The green synthesis process is based on flash precipitation of dissolved lignin polymer, which enabled the formation of nanoparticles in the size range of 45–250 nm. The size evolution of the two types of lignin particles is fitted on the basis of modified diffusive growth kinetics and mass balance dependencies. The surface properties of the nanoparticles are fine-tuned by coating them with a cationic polyelectrolyte, poly(diallyldimethylammonium chloride). We analyze how the colloidal stability and dispersion properties of these two types of nanoparticles vary as a function of pH and salinities. The data show that the properties of the nanoparticles are governed by the type of lignin used and the presence of polyelectrolyte surface coating. The coating allows the control of the nanoparticles’ surface charge and the extension of their stability into strongly basic regimes, facilitating their potential application at extreme pH conditions

The problematic role of materialistic values in the pursuit of sustainable well-being

Strong materialistic values help to maintain consumer capitalism, but they can have negative consequences for individual well-being, for social equity and for environmental sustainability. In this paper, we add to the existing literature on the adverse consequences of materialistic values by highlighting their negative association with engagement in attitudes and actions that support the achievement of sustainable well-being. To do this, we explore the links between materialistic values and attitudes towards sufficiency (consuming “just enough”) as well as mindfulness (non-judgmental awareness of the present moment) and flow (total immersion in an activity), which have all been linked to increased well-being and more sustainable behaviours. We present results from three correlational studies that examine the association between materialistic values and sufficiency attitudes (Study 1, n = 310), a multi-faceted measure of mindfulness (Study 2, n = 468) and the tendency to experience flow (Study 3, n = 2000). Results show that materialistic values were negatively associated with sufficiency attitudes, mindfulness, and flow experiences. We conclude with practical considerations and suggest next steps for tackling the problematic aspects of materialism and encouraging the development of sustainable well-being

Barriers and facilitators to accessing health and social care services for people living in homeless hostels: a qualitative study of the experiences of hostel staff and residents in UK hostels

INTRODUCTION: The number of people living in homeless hostels in the UK has steadily increased over the past decade. Despite people experiencing homelessness often having considerable health problems and a range of complex needs frequently in association with addictions, the experiences of hostel staff and residents especially in relation to accessing health and social care support have seldom been explored. The aim of this paper is to identify the barriers and facilitators to accessing health and social care services for people living in homeless hostels. DESIGN: Exploratory qualitative baseline data were collected as part of an intervention to facilitate palliative care in-reach into hostels. SETTING/PARTICIPANTS: Interviews were conducted with 33 participants; 18 homeless hostel managers/support staff and 15 people experiencing homelessness, from six homeless hostels in London and Kent. RESULTS: Three themes were identified (1) internal and external service barriers to health and social care access due to stigma, lack of communication and information sharing from services and assumptions around capacity and the role of the hostel, (2) the impact of lack of health and social care support on hostel staff leading to burnout, staff going beyond their job role and continuous support given to residents, (3) potential facilitators to health and social care access such in-reach and support from those who understand this population and hostel staff training. DISCUSSION: Residents have multiple complex needs yet both hostel staff and residents face stigma and barriers accessing support from external services. Positive relationships were described between hostel residents and staff, which can be an essential step in engaging with other services. People experiencing homelessness urgently need better access to person-centred, trauma-informed support ideally via in-reach from people who understand the needs of the population