Convergence acceleration of the doubly periodic Green's function for the analysis of thin wire arrays

A method is proposed to accelerate the evaluation of the Green's function of an infinite double periodic array of thin wire antennas. The method is based on the expansion of the Green's function into series corresponding to the propagating and evanescent waves and the use of Poisson and Kummer transformations enhanced with the analytic summation of the slowly convergent asymptotic terms. Unlike existing techniques the procedure reported here provides uniform convergence regardless of the geometrical parameters of the problem or plane wave excitation wavelength. In addition, it is numerically stable and does not require numerical integration or internal tuning parameters, since all necessary series are directly calculated in terms of analytical functions. This means that for nonlinear problem scenarios that the algorithm can be deployed without run time intervention or recursive adjustment within a harmonic balance engine. Numerical examples are provided to illustrate the efficiency and accuracy of the developed approach as compared with the Ewald method for which these classes of problems requires run time splitting parameter adaptation.

An audit of assessment and reporting by Approved Social Workers (ASWs)

This paper examines the routine practice of Approved Social Workers (ASWs) in adult mental health services in Northern Ireland. It begins with a review of existing literature on the ASW role before describing how a retrospective audit, using a mixed methods approach, was used to collect data on eighty-four assessments carried out to determine whether compulsory admission to hospital was needed. Respondents were also asked to consider how such assessments might be affected by proposed changes to the law in this field. The key findings highlighted a number of areas of practice that may be improved. There were inconsistencies in how the assessments were recorded and an uneven distribution of workloads across ASWs. Some problems were identified with interagency working and, in a quarter of the assessments, the ASW reported having felt afraid or at risk. The authors make a number of recommendations, which include: the use of a standard reporting procedure; that organisations should consider how to deliver a more even distribution of ASW workload; that protocols should be developed that ensure that ASWs are not left alone in potentially risky situations; and that joint assessments with General Practitioners should be required, rather than just recommended.

Coercion in the Community: A Situated Approach to the Examination of Ethical Challenges for Mental Health Social Workers

Increasingly, mental health social workers in the United Kingdom and elsewhere in the world are employing coercive interventions with clients. This paper explores this trend in the context of community-based settings, using national and international research literature on this subject. It begins with a discussion about the complex, contested nature of ideas on coercion. The authors then explore debates about how coercion is perceived and applied in practice. They choose two forms of coercion*/informal types of leverage, and the legally mandated use of Community Treatment Orders*/to highlight the range of ethical problems and dilemmas that confront practitioners in this field. The authors conclude by developing a tentative, explanatory model to explain how and why mental health social workers should consider a more holistic, situated approach to help deal with ethical concerns about the use of coercion.

Decision making by senior social workers at point of first referral

In the United Kingdom there has been difficulty in implementing the family support provisions contained in the 1989 Children Act, largely because of continued emphasis on child protection activity by local authorities. There is an observable international tendency for child-care referrals to receive investigative response, resulting in families being traumatized and children's needs left unmet. There has been a lack of research into how child-care referrals are initially categorized by senior social workers. This paper reports on research undertaken in two Health and Social Services Trusts within Northern Ireland to ascertain if it might be possible to treat more initial referrals as 'child-care problem enquiries' as opposed to 'child protection investigations'. Results demonstrate that, while such potential may exist, a preoccupation with the management of risk could lead to the development of child-care problems receiving quasi-child protection responses. Consequently, changes in initial decision making may not have the full intended effects in terms of the organizational release of resources for family support or a lessening of the traumatic impact upon families.

Relationships matter: The problems and prospects for social workers' relationships with young children in care

One of the key lessons learnt in the UK from the Laming Inquiry into the death of Victoria Climbié was the importance of social workers developing consistent and long-term relationships with young children in whose lives they are involved. This issue is now informing policy developments, including the proposed Social Work Practices which, based on a similar model to General Practitioner practices, aim to provide a lead professional to act as a parental figure and an advocate for every child in care. This paper begins by confirming the importance of developing relationships between social workers and young children, but questions the ability of the new policy developments to facilitate these. Drawing upon data from research involving interviews with social workers, the paper outlines the factors which hinder social workers' relationships with young children and argues that while the new proposals address some of the more surface structural and organizational factors, they do not address the deeper factors regarding attitudes, values and emotional competence which are crucial if social workers are to successfully build relationships with young children in care.

Risks to home care workers: Professional perspectives

Care at home is fundamental to community care policy, but the simultaneous growth of health and safety regulation has implications for home care services because of the duty of employers towards home care workers. This grounded theory study set in Northern Ireland used data from 19 focus groups and nine semi-structured interviews with a range of health and social services professionals and managers to explore perspectives on planning long term care for older people. Home care workers faced a wide range of hazards in the homes of clients, who themselves were faced with adapting their living habits due to their changing health and care needs and 'risks.' Creative approaches were used to ensure the health and safety of home care workers and simultaneously to meet the choices of clients. Staff experienced feelings of conflict when they judged it necessary to impose their way of providing home care and thus impose their values on clients to create a safe working environment. There was variation between and within organizations in terms of the staff focus on client needs or on their employer responsibility towards home care workers. The planning of home care services must take account of both the choices of clients and the hazards facing home care staff.

Deciding to Detain: The Use of Compulsory Mental Health Law by Social Workers

Critical commentary

Best of the old alongside the new: training for part-time youth workers

Set against the dearth of published research into the effectiveness of youth leadership training programmes, the present study describes how a comprehensive evaluation model was utilised to evaluate one such programme in Northern Ireland over a 3-year period. The training welds together a traditional curriculum approach and a competence-based methodology to provide an integrated experience for the part-time youth worker participants (n = 128). Self-completion questionnaires and follow-up interviews with a random sample of these youth workers and their supervisors were used to collect data. Outcomes suggest that the synthesis of these two training strategies is not only effective in meeting the learning needs of youth workers, but also leads to identifiable improvements in the range and quality of youth work programmes available to young people

Monitoring of Corrosion in Structural Reinforcing Bars: performance comparison using in-situ fibre optic and electric wire strain gauge systems

Abstract This work addresses the problems of effective in situ measurement of the initiation or the rate of steel corrosion in reinforced concrete structures through the use of optical fiber sensor systems. By undertaking a series of tests over prolonged periods, coupled with acceleration of corrosion, the performance of fiber Bragg grating-based sensor systems attached to high-tensile steel reinforcement bars (ldquorebarsrdquo), and cast into concrete blocks was determined, and the results compared with those from conventional strain gauges where appropriate. The results show the benefits in the use of optical fiber networks under these circumstances and their ability to deliver data when conventional sensors failed.

Local, European and global: An exploration of migration patterns of social workers into Ireland

Whilst the project to increase workforce mobility is part of a common labour force policy across the European Union, for some social workers, it has also been coupled with an aspiration to develop a pan-European identity within the profession (Lorenz, 1994, 2000; Frost, 2008). In this article, taking the island of Ireland as an example, we examine empirical data on the movement of social workers in recent years, both within Ireland and inward from outside the island, and consider the challenges and opportunities this has presented for the profession, also drawing on the British experience. From this analysis, some tentative conclusions are drawn about what is happening, what is possible and what is desirable in balancing aspirations for increased mobility within the European Union and a pan-European social work identity against the needs and interests of local, European and global communities.