Concentration and purification of entanglement for qubit systems with ancillary cavity fields

We propose schemes for entanglement concentration and purification for qubit systems encoded in flying atomic pairs. We use a cavity-quantum electrodynamics setting as the paradigmatic scenario within which our proposals can be implemented. Maximally entangled pure states of qubits can be produced as a result of our protocols. In particular, the concentration protocol yields Bell states with the largest achievable theoretical probability while the purification scheme produces arbitrarily pure Bell states. The requirements for the implementation of these protocols are modest, within the state of the art, and we address all necessary steps in two specific set-ups based on experimentally mature microwave technology.Comment: 10 pages, 6 figure

Hearing the grass grow. Emotional and epistemological challenges of practice-near research

This paper discusses the concept of practice-near research in terms of the emotional and epistemological challenges that arise from the researcher coming 'near' enough to other people for psychological processes to ensue. These may give rise in the researcher to confusion, anxiety and doubt about who is who and what is what; but also to the possibility of real emotional and relational depth in the research process. Using illustrations from three social work doctoral research projects undertaken by students at the Tavistock Clinic and the University of East London the paper examines four themes that seem to the author to be central to meaningful practice-near research undertaken in a spirit of true emotional and epistemological open-mindedness: the smell of the real; losing our minds; the inevitability of personal change; and the discovery of complex particulars

A new array for the study of ultra high energy gamma-ray sources

The design and operation of a 32 x 1 10 to the 15th power sq m array of scintillation detectors for the detection of 10 to the 15th power eV cosmic rays is described with an expected angular resolution of 1 deg, thus improving the present signal/background ratio for gamma ray sources. Data are recorded on a hybrid CAMAC, an in-house system which uses a laser and Pockel-Cell arrangement to routinely calibrate the timing stability of the detectors

13_2_30: experiences, perceptions and expectations of retail employment for Generation Y

Purpose This paper examines Generation Y, potential graduate entrants to UK retailing, in respect of their job experiences, career perceptions and initial employment expectations. Design, methodology, approach Utilising qualitative research methods, an exploratory study was undertaken with 33 students (all of whom fell into the category of Generation Y) from two UK universities. Findings The study found that many of the propositions contained within the Generation Y literature were reflected among participants in relation to their future career and lifestyle aspirations. This points to the need for retailers to carefully manage graduate expectations and experiences to ensure commitment to the sector. Research Limitations/implications Being an exploratory study, the results are not genralisable to the wider population. The findings frame a future longitudinal study on the retail careers of Generation Y graduates as they move from the anticipation to the encounter stage of their career development. This will seek to further explore the implications of Generation Y values, including those relating to diversity and equality which were not raised as an issue in this preliminary study. Originality/Value The findings of this research contribute to our knowledge of the career aspirations of Generation Y. It indicates to retailers some of the future recruitment and HR practices they might adopt to meet the needs of this generation of employees

Students' Views of Retail Employment - key findings from Generation Ys

Purpose: the aim of this article is to highlight some preliminary findings regarding students’ perceptions of retail employment. It concentrates on those students who belong to Generation Y, those born between 1977 and 1994. Methodology: the research instrument consisted of a questionnaire survey administered to business studies students at two Scottish universities – Glasgow Caledonian University and Stirling University. This article reports on responses to 340 of these questionnaires – those students who already have some experience of retail employment, mainly as their part-time employment experiences while studying for their degree. Findings: retail employment experience is common with the majority of students. Their expectations for future retail employment after graduation is to enjoy their work, while they are also concerned with fairness, equality and tolerance from their future employment. Practical implications: the results are of benefit to retail employers’ as preliminary indications of how they can attract potential graduate entrants into the sector. They provide some areas that retail companies should be addressing in their recruitment literature. These factors include future career opportunities including opportunities for self development, training and development, as well as pay and job security. Other factors that are also important to highlight are responsibility and challenging work opportunities and the maintenance of a good work-life balance. Originality/value: this is an under-researched topic in the area of retail employment and Generation Y

Can self-report questionnaires create illness cognitions in middle-aged men?

Objective: To examine the effect of questionnaire context on self-reported illness cognition. Design: A single-item measure of the perceived impact of lower urinary tract symptoms (LUTS) was embedded twice in a questionnaire battery completed by community-dwelling middle-aged males (N = 1,790). The impact measure was placed in two distinct questionnaire contexts; at the end of a general somatic symptoms questionnaire, and following an illness-specific symptoms questionnaire. The order of the two questionnaire contexts was counter-balanced in a random sub-sample. Main Outcome Measures: An established single-item measure of the perceived impact of LUTS. Results: Concordance between the two single-item measures was moderate. Scores on a single-item measure of impact were significantly lower when assessed immediately following the completion of a LUTS-specific questionnaire than when assessed following the completion of a general symptoms questionnaire. There was no evidence of order effects. The observed effect was moderated by the severity of LUTS such that the difference in perceived impact scores between contexts (where general symptoms context > illness-specific context) increased as urinary symptoms increased. Conclusion: Questionnaire context systematically influenced responses on self-report measures of illness impact. The magnitude of the context effect was largest in the highest quintile of LUTS severity, a difference of >0.5 on a scale with a range of 3. These findings may have implications for situations where patient reported outcome measures are used to evaluate healthcare interventions or inform treatment decisions

On Love-type waves in a finitely deformed magnetoelastic layered half-space

In this paper, the propagation of Love-type waves in a homogeneously and finitely deformed layered half-space of an incompressible non-conducting magnetoelastic material in the presence of an initial uniform magnetic field is analyzed. The equations and boundary conditions governing linearized incremental motions superimposed on an underlying deformation and magnetic field for a magnetoelastic material are summarized and then specialized to a form appropriate for the study of Love-type waves in a layered half-space. The wave propagation problem is then analyzed for different directions of the initial magnetic field for two different magnetoelastic energy functions, which are generalizations of the standard neo-Hookean and Mooney–Rivlin elasticity models. The resulting wave speed characteristics in general depend significantly on the initial magnetic field as well as on the initial finite deformation, and the results are illustrated graphically for different combinations of these parameters. In the absence of a layer, shear horizontal surface waves do not exist in a purely elastic material, but the presence of a magnetic field normal to the sagittal plane makes such waves possible, these being analogous to Bleustein–Gulyaev waves in piezoelectric materials. Such waves are discussed briefly at the end of the paper