1,455 research outputs found

    LANDSAT menhaden and thread herring resources investigation, Gulf of Mexico

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    The author has identified the following significant results. The most significant achievements thus far include the successful charting of high probability fishing areas from LANDSAT MSS data and the successful simulation of an operational satellite system to provide tactical information for the commercial harvest of menhaden

    Assessing satisfaction with social care services among black and minority ethnic and white British carers of stroke survivors in England

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    Overall satisfaction levels with social care are usually high but lower levels have been reported among black and minority ethnic (BME) service users in England. Reasons for this are poorly understood. This qualitative study therefore explored satisfaction with services among informal carer participants from five different ethnic groups. Fifty-seven carers (black Caribbean, black African, Asian Indian, Asian Pakistani and white British) were recruited from voluntary sector organisations and a local hospital in England, and took part in semi-structured interviews using cognitive interviewing and the critical incident technique. Interviews took place from summer 2013 to spring 2014. Thematic analysis of the interviews showed that participants often struggled to identify specific ‘incidents’, especially satisfactory ones. When describing satisfactory services, participants talked mostly about specific individuals and relationships. Unsatisfactory experiences centred on services overall. When rating services using cognitive interviewing, explicit comparisons with expectations or experiences with other services were common. Highest satisfaction ratings tended to be justified by positive personal characteristics among practitioners, trust and relationships. Lower level ratings were mostly explained by inconsistency in services, insufficient or poor care. Lowest level ratings were rare. Overall, few differences between ethnic groups were identified, although white British participants rated services higher overall giving more top ratings. White British participants also frequently took a more overall view of services, highlighting some concerns but still giving top ratings, while South Asian carers in particular focused on negative aspects of services. Together these methods provide insight into what participants mean by satisfactory and unsatisfactory services. Cognitive interviewing was more challenging for some BME participants, possibly a reflection of the meaningfulness of the concept of service satisfaction to them. Future research should include comparisons between BME and white participants’ understanding of the most positive parts of satisfaction scales and should focus on dissatisfied participants

    LANDSAT menhaden and thread herring resources investigation

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    The author has identified the following significant results. The relationship between the distribution of menhaden and selected oceanographic parameters (water color, turbidity, and possibly chlorophyll concentrations) was established. Similar relationships for thread herring were not established nor were relationships relating to the abundance of either species. Use of aircraft and LANDSAT remote sensing instruments to measure or infer a set of basic oceanographic parameters was evaluated. Parameters which could be accurately inferred included surface water temperature, salinity, and color. Water turbidity (Secchi disk) was evaluated as marginally inferrable from the LANDSAT MSS data and chlorophyll-a concentrations as less than marginal. These evaluations considered the parameters only as experienced in the two test areas using available sensors and statistical techniques

    Slotted Rotatable Target Assembley and Systematic Error Analysis for a Search for Long Range Spin Dependent Interactions from Exotic Vector Boson Exchange Using Neutron Spin Rotation

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    We discuss the design and construction of a novel target array of nonmagnetic test masses used in a neutron polarimetry measurement made in search for new possible exotic spin dependent neutron–atominteractions of Nature at sub-mm length scales. This target was designed to accept and efficiently transmit a transversely polarized slow neutron beam through a series of long open parallel slots bounded by flat rectangular plates. These openings possessed equal atom density gradients normal to the slots from the flat test masses with dimensions optimized to achieve maximum sensitivity to an exotic spin-dependent interaction from vector boson exchanges with ranges in the mm - ÎŒm regime. The parallel slots were oriented differently in four quadrants that can be rotated about the neutron beam axis in discrete 90°increments using a Geneva drive. The spin rotation signals from the 4 quadrants were measured using a segmented neutron ion chamber to suppress possible systematic errors from stray magnetic fields in the target region. We discuss the per-neutron sensitivity of the target to the exotic interaction, the design constraints, the potential sources of systematic errors which could be present in this design, and our estimate of the achievable sensitivity using this method

    Mental health service user experiences of targeted violence and hostility and help-seeking in the UK: a scoping review

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    The aim of this research scoping review was to assemble an evidence base for the UK on mental health service user experiences and perspectives on mental health-related targeted violence and hostility ('disability hate crime'). It also aims to address some of the gaps in the knowledge on risk management, help-seeking and prevention from the perspectives of those who experienced targeted violence and hostility because of their mental health problems or psychiatric status. Seven key mental health and social care bibliographic databases were searched for relevant UK research studies from 1990 until 2016. Grey literature was identified through online searches. A scoping review charting approach and thematic analysis methodology were used to analyse the studies. In total 13 studies were finally included, over half of which used survey methods. All studies included people with experiences of mental health problems. The studies provide information on: the types of potential hate crime; indicate where incidents take place; give some insight into the victims' relationship with the perpetrators; the location of incidents as well as the psychological, social, financial and physical impacts on the victim; the types of help-seeking behaviours adopted by the victims; a range coping strategies that people with mental health problems adopted in response to experiences of targeted violence or abuse. This scoping review provides a UK-based overview of mental health service user concepts and experiences of mental health-related targeted violence and hostility ('disability hate crime'). It reveals some specific issues relating to mental health and disability hate crime. Further investigation into disability hate crime with a specific focus on mental health is required. This is a UK-based overview, which offers a useful comparator for researchers, practitioners and policy-makers internationally

    A high-field adiabatic fast passage ultracold neutron spin flipper for the UCNA experiment

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    The UCNA collaboration is making a precision measurement of the ÎČ asymmetry (A) in free neutron decay using polarized ultracold neutrons (UCN). A critical component of this experiment is an adiabatic fast passage neutron spin flipper capable of efficient operation in ambient magnetic fields on the order of 1 T. The requirement that it operate in a high field necessitated the construction of a free neutron spin flipper based, for the first time, on a birdcage resonator. The design, construction, and initial testing of this spin flipper prior to its use in the first measurement of A with UCN during the 2007 run cycle of the Los Alamos Neutron Science Center's 800 MeV proton accelerator is detailed. These studies determined the flipping efficiency of the device, averaged over the UCN spectrum present at the location of the spin flipper, to be Ï”(overbar) = 0.9985(4)

    Occupation time limits of inhomogeneous Poisson systems of independent particles

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    We prove functional limits theorems for the occupation time process of a system of particles moving independently in RdR^d according to a symmetric α\alpha-stable L\'evy process, and starting off from an inhomogeneous Poisson point measure with intensity measure ÎŒ(dx)=(1+∣x∣γ)−1dx,Îł>0\mu(dx)=(1+|x|^{\gamma})^{-1}dx,\gamma>0, and other related measures. In contrast to the homogeneous case (Îł=0)(\gamma=0), the system is not in equilibrium and ultimately it vanishes, and there are more different types of occupation time limit processes depending on arrangements of the parameters Îł,d\gamma, d and α\alpha. The case Îł<d<α\gamma<d<\alpha leads to an extension of fractional Brownian motion.Comment: 22 page

    "Keeping Control": a user‐led exploratory study of mental health service user experiences of targeted violence and abuse in the context of adult safeguarding in England

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    The situation for people with mental health problems as a group of disabled people who experience targeted violence and abuse is a complex one. Disabled people, particularly those with mental health problems, are at higher risk of targeted violence and hostility with few effective evidence‐based prevention and protection strategies. Achieving effective safeguarding for adults with mental health problems is characterised by differential attitudes to and understandings of abuse by safeguarding practitioners, as well as systemic issues arising from multi‐agency working. “Keeping Control” was a 16‐month user‐led, co‐produced exploratory qualitative study into service user experiences of targeted violence and abuse that was examined in the context of Care Act 2014 adult safeguarding reforms in England. User‐controlled interviews of mental health service users (N = 23) explored their experiences and concepts of targeted violence and abuse, prevention and protection. Preliminary findings from these interviews were discussed in adult safeguarding and mental health stakeholder and practitioner focus groups (N = 46). The data were also discussed via two facilitated Twitter chats (responses N = 585 and N = 139). Mental health service users’ experiences and concepts of risk from others, vulnerability and neglect can be different to those of practitioners but should be central to adult safeguarding. Histories of trauma, multi‐factorial abuse; living with fear and stigma as well as mental distress; the effects of “psychiatric disqualification” and individual blaming should be addressed in adult safeguarding in mental health. Fragmented responses from services can mean a person becomes “lost in the process”. Staff can feel disempowered, afraid or lacking in confidence to “speak up” for individuals in complex service systems with poor communication and lines of accountability. Adult safeguarding practitioners and stakeholders need to be confident, accessible and respond quickly to service users reporting incidents of targeted violence and abuse particularly in closed environments such as wards or supported housing

    ‘Dignity and respect’: An example of service user leadership and co‐production in mental health research

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    This paper explores the methodological aspects of a user‐led study investigating mental health service user experiences of targeted violence and abuse (often called 'hate crime'). 'Keeping Control' was a 16‐month qualitative study, undertaken in the context of adult safeguarding reforms in England. By collecting data on service user concepts and experiences, the research sought to address a gap in research and practice knowledge relating to targeted violence, abuse and hostility against people with mental health problems. In this paper, we discuss the significance of the design and methodology used for this study, with a particular focus on the interviews with service users. The research was both user‐led and carried out in collaboration with practitioners and academics, a form of research co‐production. Our aim is to inform researchers, practitioners and policymakers about the value of user leadership in co‐productive research with practitioners, particularly for a highly sensitive and potentially distressing topic
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