4,454 research outputs found
Psychologist's responses to medication concerns
Section A: Presented here, is a systematic review of the literature detailing the experiences of taking psychotropic medication in service users from minoritised ethnic backgrounds with psychosis-related diagnoses. Eleven qualitative studies are discussed and critically appraised. The review synthesises findings under six main categories; medication helping versus negative effects; coercion; âTheyâre quite happy to just hand out pillsâ; surrender versus disengaging; the need for cultural understandings alongside medication; and family support for versus opposition to medication. The review provides some initial evidence which suggests negative experiences of medication (predominant in the papers), although not specific to ethnicity per se, are more likely to be compounded if service users are a member of a minoritised ethnic group. Future research would benefit focusing on the voices of service users from minoritised ethnicities looking directly at this issue and investigating how clinicians might respond to service users who wish to challenge their current treatment.
Section B: Presented here, is a study exploring psychologistsâ experience of responses to concerns about the medication of service users given a psychosis-related diagnoses. Guided by a critical realist grounded theory methodology, the constructed model identified 43 sub-categories organised within six main categories: Observing Coercion; âWalking the Tight Ropeâ; âListenâ or âShut Downâ; Service Users âStuck in the Middleâ; Teams, People and Relationships; Economic Climate and Societal Discourses. Findings highlight some of the dilemmas participants experienced regarding medication and is important in its acknowledgement of how difficult it can be to negotiate these dilemmas. The results indicate the need to improve shared decision making with service users, to offer increased support in the withdrawal of medication, and to help teams feel able to take more positive risks in relation to prescribing
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Layer Formation Studies in Selective Laser Melting of Steel Powders
This paper advances the findings of the selective laser melting (SLM) of tool steel and
stainless steel powders. The distinguishing feature is the melting of single layers in deep powder
beds by a continuous CO2 laser. First, effect of process parameters on the surface roughness for
each material is investigated. Based on these results combined with visual observation of the
solidified tracks, the question is then discussed as how the processability of various type of steels
is changed. The results show that surface morphology of layers is affected strongly by scan
spacing, thereby giving a lower average roughness at reduced scan spacing. The effect of scan
speed is also remarkable. In addition, other roughness parameters such as the peak height and
skewness are found to be useful tools for evaluation of laser melted surfaces.Mechanical Engineerin
Analysis and testing for rotordynamic coefficients of turbulent annular seals with different, directionally homogeneous surface-roughness treatment for rotor and stator elements
A theory is presented, based on a simple modification of Hirs' turbulent lubrication equations, to account for different but directionally-homogeneous surface roughness treatments for the rotor and stator of annular seals. The theoretical results agree with von Pragenau's predictions that a damper seal which uses a smooth rotor and a rough stator yields more net damping than a conventional seal which has the same roughness for both the rotor and stator. Experimental results for four stators confirm that properly-designed roughened stators yield higher net damping values and substantially less leakage than seals with smooth surfaces. The best seal from both damping and leakage viewpoints uses a round-hole-pattern stator. Initial results for this stator suggest that, within limits, seals can be designed to yield specified ratios of stiffness to damping
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Further Developments in Process Mapping and Modelling in Direct Metal Selective Laser Melting
This paper advances previous reported work on the mapping and modelling of single
tracks and layers produced in powder beds of tool steel and stainless steel powders by a CO2
laser. For single tracks it reports on predicted and simulated track masses. It validates the
simulations, including the use of absorption close to 1.0 when cylindrical tracks are formed. It
also reports on melt pool temperature calculations and estimated melt pool dimensions which are
used, in conjunction with bed physical properties, to explain why the single tracks form as either
continuous with a crescent shape cross-section, continuous with an elliptical section,
discontinuously irregularly broken, discontinuously balled or only partially melted as scan
speeds and laser powers change. It then extends its scope, experimentally, to consider effects of
scan spacing on single layer formation.Mechanical Engineerin
Metal alloy resistivity measurements at very low temperatures
High speed, automated system accurately measures to approximately one percent in three minutes. System identifies materials having constant thermal or electric conductivity, predicts new material properties, develops alloys in accordance with desired specifications, and develops nondestructive devices for measuring precipitation hardening
Universal quantum computation by discontinuous quantum walk
Quantum walks are the quantum-mechanical analog of random walks, in which a
quantum `walker' evolves between initial and final states by traversing the
edges of a graph, either in discrete steps from node to node or via continuous
evolution under the Hamiltonian furnished by the adjacency matrix of the graph.
We present a hybrid scheme for universal quantum computation in which a quantum
walker takes discrete steps of continuous evolution. This `discontinuous'
quantum walk employs perfect quantum state transfer between two nodes of
specific subgraphs chosen to implement a universal gate set, thereby ensuring
unitary evolution without requiring the introduction of an ancillary coin
space. The run time is linear in the number of simulated qubits and gates. The
scheme allows multiple runs of the algorithm to be executed almost
simultaneously by starting walkers one timestep apart.Comment: 7 pages, revte
The Viscosity and Thermal Conductivity Coefficients of Dilute Neon, Krypton, and Xenon
Viscosity and thermoconductivity coefficients of dilute neon, krypton, and xeno
Wave Profile for Current Bearing Antiforce Waves
For fluid dynamical analysis of breakdown waves, we employ a one-dimensional, three-component (electrons, ions and neutral particles) fluid model to describe a steady-state, ionizing wave propagating counter to strong electric fields. The electron gas temperature and therefore the electron fluid pressure is assumed to be large enough to sustain the wave motion down the discharge tube. Such waves are referred to as antiforce waves. The complete set of equations describing such waves consists of the equations of conservation of mass, momentum and energy coupled with Poissonâs equation. Inclusion of current behind the wave front alters the set of electron fluid dynamical equations and also the boundary condition on electron temperature. For a range of experimentally observed current values, using the modified boundary condition on electron temperature, we have been able to integrate our modified set of electron fluid dynamical equations through the Debye layer. Our solutions meet the expected boundary conditions at the trailing edge of the wave. We present the wave profile for electric field, electron velocity, electron number density and electron temperature within the Debye layer of the wave
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