Search results

For sufferers of dementia and their carers, there are many questions to be answered; not only about what the long term will bring, but also simply how to cope with the unfolding of everyday living. In our first article, Graham Stokes looks at some of the practicalities of coping with the illness and offers useful tips and advice that will hopefully provide some reassurance and pointers for managing day‐to‐day tasks more easily.

The purpose of this paper is to extend the penalty concept to treat partial slip, free surface, contact and related boundary conditions in viscous flow simulation.

The penalty partial‐slip formulation is analysed and related to the classical Navier slip condition. The same penalty scheme also allows partial penetration through a boundary, hence the implementation of porous wall boundaries. The finite element method is used for investigating and interpreting penalty approaches to boundary conditions.

The generalised penalty approach is verified by means of a novel variant of the circular‐Couette flow problem, having partial slip on one of the cylindrical boundaries, for which an analytic solution is derived. Further verificationis provided by consideration of viscous flow over a sphere with partial slip on the surface, and comparison of numerical and classical solutions. Numerical studies illustrate the versatility of the approach.

The penalty approach is applied to some different boundaries: partial slip and partial penetration with no/full slip/penetration as limiting cases; free surface; space‐ and time‐varying boundary conditions which allow progressive contact over time. Application is made to curved and inclined boundaries. Sensitivity of flow to penalty parameters is an avenue for continued research, as is application of the penalty approach for non‐Newtonian flows.

This is the first work to show the relation between penalty formulation of boundary conditions and physical boundary conditions. It provides a method that overcomes past difficulties in implementing partial slip on boundaries of general shape, and which handles progressive contact. It also provides useful benchmark problems for future studies.

Trauma-focussed cognitive-behaviour therapy (TF-CBT) is the most effective treatment for post-traumatic stress disorder (PTSD). Individuals who present with complex PTSD are among the most complex and challenging patients seen by intellectual disability psychology and psychiatry services. The purpose of this paper is to study TF-CBT intervention for people with intellectual disabilities and complex PTSD.

Three groups of adults with intellectual disabilities (ID) presenting with complex PTSD (n=3, n=5 and n=4) were treated using a 12-week manualised intervention adapted from a procedure routinely used in adult mental health services. Participants completed the Impact of Event Scale as adapted for people with intellectual disabilities (IES-ID) before and after the intervention, and interviews conducted to ascertain their experiences of the group were analysed using interpretative phenomenological analysis (IPA).

The ten participants who completed the intervention showed a 27 per cent decrease in median Impact of Event Scale Intellectual Disabilities scores, equivalent to a medium effect size (d=0.50). Five themes were identified from the interviews: being listened to; it is nice to know you are not the only one; being in a group can be stressful; the importance of feeling safe; achieving and maintaining change. Participants also provided constructive feedback to promote improvements to the manual.

A feasibility study followed by methodologically robust clinical trials is now needed to establish the effectiveness of the intervention and its utility in clinical practice.

This small study has confirmed the potential of TF-CBT as an intervention for extremely vulnerable individuals with ID who present with complex PTSD.

The findings indicate that a group intervention is both feasible for and acceptable to adults with ID.

To date, no study has investigated the effectiveness and feasibility of a TF-CBT group intervention for adults with mild ID.

Erratically before World War II and consistently thereafter data exist which support comparative study of standards of provision in most British public libraries. If we accept the assumption that those libraries provide best for their readers that spend most on their service the same data identify unmistakably librarians who would be regarded as successful by their contemporaries. At Rugby F. G. B. Hutchings was a pioneer. What was his achievement at Leeds?

The purpose of this paper is to present the method of lines (MOL) solution of the stimulated Brillouin scattering (SBS) equations (a system of three first-order hyperbolic partial differential equations (PDEs)), describing the three-wave interaction resulting from a coupling between light and acoustic waves. The system has complex numbers and boundary values.

System of three first-order hyperbolic PDEs are first transformed and then spatially discretized. Superbee flux limiter is proposed to offset numerical damping and dispersion, brought on by the low order approximation of spatial derivatives in the PDEs. In order to increase computational efficiency, the structured structure of the PDE Jacobian matrix is identified and a sparse integration algorithm option of the ordinary differential equation (ODE) solvers is used. The flux limiter based on higher order approximations eliminates numerical oscillation. Examples are presented, and the performance of the Matlab ODE solvers is evaluated by comparison.

This type of solution provides a rapid means of investigating SBS as a tool in fiber optic sensing.

To the best of the authors' knowledge, MOL solution is proposed for the first time for the modeling of three-wave interaction in a SBS-based fiber optic sensor.

The purpose of this paper is the theoretical presentation of tensorial formulation with surface mobility forces and numerical verification of Reynolds thermal transpiration law in a contemporary experiment with nanoflow.

The velocity profiles in a single microchannel are calculated by solving the momentum equations and using thermal transpiration force as the boundary conditions. The mass flow rate and pressure of unstationary thermal transpiration modeling of the benchmark experiment has been achieved by the implementation of the thermal transpiration mobility force closure for the thermal momentum accommodation coefficient.

An original and easy-to-implement method has been developed to numerically prove that at the final equilibrium, i.e. zero-flow state, there is a connection between the Poiseuille flow in the center of channel and counter thermal transpiration flow on the surface. The numerical implementation of the Reynolds model of thermal transpiration has been performed, and its usefulness for the description of the benchmark experiment has been verified.

The simplified procedure requires the measurement or assumption of the helium-glass slip length.

The procedure can be very useful in the design of micro-electro-mechanical systems and nano-electro-mechanical systems, especially for accommodation pumping.

The paper discussed possible constitutive equations in the transpiration shell-like layer. The new approach can be helpful for modeling phenomena occurring at a fluid–solid phase interface at the micro- and nanoscales.