7,449 research outputs found
Secure services for people with learning disabilities
Section A: A review of qualitative literature exploring people with learning disabilities’ experiences of secure forensic services. Critical appraisal of the 12 included studies is discussed. Thematic synthesis resulted in three analytical themes with eight sub-themes. Analytical themes included ‘it’s not the ideal place to live’, ‘relationships within the unit’ and ‘change’. Implications for clinical practice are considered, including helpful and unhelpful
aspects of secure services as experienced by people with learning disabilities. Recommendations for future research include further exploration of the experience of psychological interventions for people with a learning disability within secure settings.
Section B: A study exploring the process by which psychology is offered within a low secure learning disability service, and resulting willingness to attend psychology. Guided by
constructivist grounded theory methodology, the constructed model identifies four domains:‘context of the offer’, ‘drive to engage patients in psychology’, ‘navigating making the offer’,‘making sense of the offer’. Interactions between these are highlighted. Findings emphasise the challenges of the dual role of staff within a forensic setting and how navigation of this may translate into patient’s receiving a mixed message regarding choice, and resulting willingness
to attend psychology. Implications for further research and clinical practice are discussed
Herschel/HIFI spectroscopy of the intermediate mass protostar NGC7129 FIRS 2
Herschel/HIFI observations of water from the intermediate mass protostar NGC 7129 FIRS 2 provide a powerful diagnostic of the physical
conditions in this star formation environment. Six spectral settings, covering four H_2^(16)O and two H_2^(18)O lines, were observed and all but one
H_2^(18)O line were detected. The four H_2
^(16)O lines discussed here share a similar morphology: a narrower, ≈6km s^(−1), component centered slightly
redward of the systemic velocity of NGC7129 FIRS 2 and a much broader, ≈25 km s^(−1) component centered blueward and likely associated
with powerful outflows. The narrower components are consistent with emission from water arising in the envelope around the intermediate
mass protostar, and the abundance of H_2O is constrained to ≈10^(−7) for the outer envelope. Additionally, the presence of a narrow self-absorption
component for the lowest energy lines is likely due to self-absorption from colder water in the outer envelope. The broader component, where the
H_2O/CO relative abundance is found to be ≈0.2, appears to be tracing the same energetic region that produces strong CO emission at high J
Near infrared spectroscopy for fibre based gas detection
Gas sensing systems based on fibre optic linked near infra red absorption cells are potentially a flexible and effective tool for monitoring accumulations of hazardous and noxious gases in enclosed areas such as tunnels and mines. Additionally the same baseline technology is readily modified to measure concentrations of hydrocarbon fuels - notably but not exclusively methane, and monitoring emissions of greenhouse gases. Furthermore the system can be readily implemented to provide intrinsically safe monitoring over extensive areas at up to ~250 points from a single interrogation unit. In this paper we review our work on fibre coupled gas sensing systems. We outline the basic principles through which repeatable and accurate self calibrating gas measurements may be realised, including the recover of detailed line shapes for non contact temperature and / or pressure measurements in addition to concentration assessments in harsh environments. We also outline our experience in using these systems in extensive networks operating under inhospitable conditions over extended periods extending to several years
Design and testing of a contra-rotating tidal current turbine
A contra-rotating marine current turbine has a number of attractive features: nearzero reactive torque on the support structure, near-zero swirl in the wake, and high relative inter-rotor rotational speeds. Modified blade element modelling theory has been used to design and predict the characteristics of such a turbine, and a model turbine and test rig have been constructed. Tests in a towing tank demonstrated the feasibility of the concept. Power coefficients were high for such a small model and in excellent agreement with predictions, confirming the accuracy of the computational modelling procedures. High-frequency blade loading data were obtained in the course of the experiments. These show the anticipated dynamic components for a contra-rotating machine. Flow visualization of the wake verified the lack of swirl behind the turbine. A larger machine is presently under construction for sea trials
Stellar Winds on the Main-Sequence I: Wind Model
Aims: We develop a method for estimating the properties of stellar winds for
low-mass main-sequence stars between masses of 0.4 and 1.1 solar masses at a
range of distances from the star.
Methods: We use 1D thermal pressure driven hydrodynamic wind models run using
the Versatile Advection Code. Using in situ measurements of the solar wind, we
produce models for the slow and fast components of the solar wind. We consider
two radically different methods for scaling the base temperature of the wind to
other stars: in Model A, we assume that wind temperatures are fundamentally
linked to coronal temperatures, and in Model B, we assume that the sound speed
at the base of the wind is a fixed fraction of the escape velocity. In Paper II
of this series, we use observationally constrained rotational evolution models
to derive wind mass loss rates.
Results: Our model for the solar wind provides an excellent description of
the real solar wind far from the solar surface, but is unrealistic within the
solar corona. We run a grid of 1200 wind models to derive relations for the
wind properties as a function of stellar mass, radius, and wind temperature.
Using these results, we explore how wind properties depend on stellar mass and
rotation.
Conclusions: Based on our two assumptions about the scaling of the wind
temperature, we argue that there is still significant uncertainty in how these
properties should be determined. Resolution of this uncertainty will probably
require both the application of solar wind physics to other stars and detailed
observational constraints on the properties of stellar winds. In the final
section of this paper, we give step by step instructions for how to apply our
results to calculate the stellar wind conditions far from the stellar surface.Comment: 24 pages, 13 figures, 2 tables, Accepted for publication in A&
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