Dynamical capture of the moon by the earth

Numerical integration of equations for dynamic capture of moon by eart

Young carers speak out! Final Report

This report considers the opinions and experiences of children and young people identified as ‘young carers’ in the Cardiff and Vale of Glamorgan regions of South Wales as they relate to the main aims of the Carers Strategies (Wales) Measure 2010

Health and development: knowledge systems and local practice in rural Thailand

The specific framing of health within a development context has implications for constructions of wellness and illness and how people react in times of ill health. In Thailand, recent national HIV/AIDS education-prevention campaigns commonly use top-down relay of public health information. This pattern replicates numerous development projects that aim to bring useful and beneficial knowledge to rural villagers. How villagers integrate this information depends, in part, on previous experiences with development programs in general and public health programs in particular. This paper considers the political economy of medical knowledge and multiple local health strategies in rural Northeast Thailand as a background to the contingent response to public health directives

Analytical approximation for the structure of differentially rotating barotropes

Approximate analytical formula for density distribution in differentially rotating stars is derived. Any barotropic EOS and conservative rotation law can be handled with use of this method for wide range of differential rotation strength. Results are in good qualitative agreement with comparison to the other methods. Some applications are suggested and possible improvements of the formula are discussed.Comment: 10 pages, 13 figures, accepted for publication in Monthly Notice

Objects of conflict: (re) configuring early childhood experiences of gender in the preschool classroom

This qualitative research paper discusses how the material environment of preschool classrooms contributes to early childhood experiences of gender. It applies poststructuralist and posthumanist concepts – primarily Barad’s agential-realism – to analyse ethnographic data extracts drawn from the author’s semi-longitudinal study in a UK nursery. This data focuses on two specific areas of the classroom, the ‘home corner’ and the ‘small world’, and the paper argues that these areas and the objects contained within them can support or challenge/queer gender roles depending on temporal material-discursive conditions. It concludes with specific thinking points for practitioners, arguing that applying these theoretical concepts to explore gender in the early years produces interesting perspectives on how rigid, binary gender roles can be challenged effectively in non-discursive ways within classrooms

Spontaneous Breaking of Rotational Symmetry in Rotating Solitons - a Toy Model of Excited Nucleons with High Angular Momentum

We study the phenomenon of spontaneous breaking of rotational symmetry (SBRS) in the rotating solutions of two types of baby Skyrme models. In the first the domain is a two-sphere and in the other, the Skyrmions are confined to the interior of a unit disk. Numerical full-field results show that when the angular momentum of the Skyrmions increases above a certain critical value, the rotational symmetry of the solutions is broken and the minimal energy configurations become less symmetric. We propose a possible mechanism as to why SBRS is present in the rotating solutions of these models, while it is not observed in the `usual' baby Skyrme model. Our results might be relevant for a qualitative understanding of the non-spherical deformation of excited nucleons with high orbital angular momentum.Comment: RevTex, 9 pages, 9 figures. Added conten

Using ultra-thin parylene films as an organic gate insulator in nanowire field-effect transistors

We report the development of nanowire field-effect transistors featuring an ultra-thin parylene film as a polymer gate insulator. The room temperature, gas-phase deposition of parylene is an attractive alternative to oxide insulators prepared at high temperatures using atomic layer deposition. We discuss our custom-built parylene deposition system, which is designed for reliable and controlled deposition of <100 nm thick parylene films on III-V nanowires standing vertically on a growth substrate or horizontally on a device substrate. The former case gives conformally-coated nanowires, which we used to produce functional $\Omega$-gate and gate-all-around structures. These give sub-threshold swings as low as 140 mV/dec and on/off ratios exceeding $10^3$ at room temperature. For the gate-all-around structure, we developed a novel fabrication strategy that overcomes some of the limitations with previous lateral wrap-gate nanowire transistors. Finally, we show that parylene can be deposited over chemically-treated nanowire surfaces; a feature generally not possible with oxides produced by atomic layer deposition due to the surface `self-cleaning' effect. Our results highlight the potential for parylene as an alternative ultra-thin insulator in nanoscale electronic devices more broadly, with potential applications extending into nanobioelectronics due to parylene's well-established biocompatible properties