30,985,226 research outputs found

    New fusion rules and \cR-matrices for SL(N)qSL(N)_q at roots of unity

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    We derive fusion rules for the composition of qq-deformed classical representations (arising in tensor products of the fundamental representation) with semi-periodic representations of SL(N)qSL(N)_q at roots of unity. We obtain full reducibility into semi-periodic representations. On the other hand, heterogeneous \cR-matrices which intertwine tensor products of periodic or semi-periodic representations with qq-deformed classical representations are given. These \cR-matrices satisfy all the possible Yang Baxter equations with one another and, when they exist, with the \cR-matrices intertwining homogeneous tensor products of periodic or semi-periodic representations. This compatibility between these two kinds of representations has never been used in physical models.Comment: 12 page

    And then there were four: a study of UK market concentration - causes, consequences and the scope for market adjustment

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    While concentration measures are a good indicator of market structure, the link with competitiveness is more complex than often assumed. In particular, the modern theory of industrial organisation makes no clear statement regarding the impact of concentration on competition - the focus of this paper is concentration and no inferences are made about competitive aspects of the market. The extent and nature of concentration within the UK listed company audit market as at April, 2002 and, pro forma, after the collapse of Andersen is documented and analysed in detail (by firm, market segment and industry sector). The largest four firms held 90 per cent of the market (based on audit fees) in 2002, rising to 96 per cent with the demise of Andersen. A single firm, Pricewaterhouse-Coopers, held 70 per cent or more of the share of six out of 38 industry sectors, with a share of 50 per cent up to 70 per cent in a further seven sectors. The provision of non-audit services (NAS) by incumbent auditors is also considered. As at April 2002, the average ratio of non-audit fees (paid to auditor) to audit fees was 208 per cent, and exceeded 300 per cent in seven sectors. It is likely, however, that disposals by firms of their management consultancy and outsource firms, combined with the impact of the Smith Report on audit committees will serve to reduce these ratios. Another finding is that audit firms with expertise in a particular sector appeared to earn significantly higher nonaudit fees from their audit clients in that sector. The paper thus provides a solid empirical basis for debate. The subsequent discussion considers the implications for companies and audit firms of the high level of concentration in the current regulatory climate, where no direct regulatory intervention is planned

    Effectiveness of Seasonal Malaria Chemoprevention in children under 10 years of age in Senegal: a stepped-wedge cluster-randomized trial

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    This study was done to determine the effectiveness of Seasonal Malaria Chemoprevention in Senegalese children up to 10 years of age using a stepped-wedge design. Outcomes included mortality, malaria cases treated as outpatients, severe malaria, and the prevalence of parasitaemia and anaemia, and adverse drug reactions. 54 health posts were randomized. 9 started implementation of SMC in 2008, 18 in 2009, and a further 18 in 2010, with 9 remaining as controls. In the first year of implementation SMC was delivered to children aged 3-59 months, the age range was then extended for the latter two years of the study to include children up to 10 years of age

    An online survey of adults with cystic fibrosis: accessing and using life expectancy information

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    A spreadsheet containing a subset of the original data from all respondents (n=85) from an online questionnaire entitled "Online survey to gain understanding of what people with cystic fibrosis aged 16+ would like to learn about their life expectancy and other outcomes". The survey was conducted in July 2016. Responses to all multiple choice questions are included. Free text responses have been removed in accordance with information provided to the respondents. Ages have been categorised. The data do not contain any identifying information

    Mortality predictor score in hospitalised patients HIV-associated TB in Africa dataset

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    This dataset contains details of hospital patients with HIV-associated tuberculosis in sub-Saharan Africa from the STAMP clinical trial. It was generated to derive predictor score for mortality including urine lipoarabinomannan detection. Variables include: age, sex, weight, living status, number of day in follow-up, ART treatment, WHO danger sign, Haemoglobin level, ability to walk, and urine LAM positivity

    inSCALE Baseline Cross-Sectional Survey Uganda

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    A data collection containing information on 6,501 children under 5 years of age in West Uganda. Data was collected during May - August 2011 as part of a baseline survey prior to implementation of the inSCALE c-RCT in the site. Dataset variables cover socioeconomic and demographic characteristics of households, symptoms of the most recent illness episode for the children during the two weeks preceding the survey, care seeking behaviour, treatments received and details of all self-reported out-of-pocket costs associated with care seeking for the episode of illness. Three datasets are made available: [1] The ‘inSCALE_baseline’ master table covers 1 child per row, and [2] a ‘inSCALE_long_baseline’ table with 1 illness condition per row (if child had more than one illness defined, one row is created for each illness) (5057 - only sick children included hence lower total), and [3] 'inSCALE_baseline_extra_cost' table containing additional data on household direct and indirect costs of care seeking collected in the baseline survey

    IDEAS project - Data Informed Platform for Health feasibility study in Uttar Pradesh

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    The IDEAS project sought to improve the health and survival of mothers and babies through generating evidence to inform policy and practice. This data collection contains topic guides and other research tools used to assess the feasibility of introducing a Data Informed Platform for Health (DIPH), in order to bring together key data from the public and private health sector on inputs and processes that may influence maternal and newborn health. The DIPH was intended to promote the use of local data for decision-making and priority setting at local health administration level, and for programme appraisal and comparison at regional and zonal level

    Delivering the English immunisation programme – survey response dataset

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    An anonymised dataset containing results of an online survey completed by 278 health practitioners in 2016. The online survey sought to assess how the national immunisation programme (specifically Section 7a immunisation programmes) was being delivered across different regions of England. The dataset contains variables on the respondent’s professional background, individual and organisational responsibility for immunisation, levels of co-operation between partner organisations to manage and deliver the immunisation programme, and what is being done to monitor and improve the performance of immunisation services (e.g. quality and uptake).The survey forms part of a long-term analysis of how the national immunisation programme is managed and delivered in the post-April 2013 health system. It is was conducted by the ‘Health Protection Research Unit (HPRU) in Immunisation’, which includes researchers from the London School of Hygiene & Tropical Medicine (LSHTM) and Public Health England. The unit is funded by the National Institute of Health Research

    Friendship Bench trial: lay worker training in problem-solving therapy to reduce symptoms of common mental disorders

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    The Friendship Bench trial is a cluster-randomised trial of the effect of problem-solving therapy training for lay workers on symptoms of common mental disorders among clinic attenders in Harare, Zimbabwe. This dataset enables replication of analysis for a paper on suicidal ideation, but has undergone anonymisation process to protect study participants. 12 primary care clinics in Harare were randomised 1:1 to intervention or control. In each clinic, 24 participants were enrolled who were: visiting the clinic (either for their own health needs or accompanying someone else); aged 18 or over; living locally; and screened positive for common mental disorder symptoms. Outcomes were measured after 6 months. 86% of participants were women, 42% were HIV positive and 91% completed follow-up
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