1,090 research outputs found

    Striking the right balance and supporting social aspirations: how agency and choice play out in a recovery-oriented mental health service

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    Introduction There has been an increasing drive for a transformation of the mental health system towards recovery orientation, with research identifying a series of key recovery principles. It has been argued that these principles remain rhetoric rather than routine practice, and it remains unclear how these are operationalised and promoted within inpatient settings. Aim To address the knowledge gap of how staff and service-users enact recovery principles during the daily workings of an inpatient mental health service. Method Twenty-one interviews were conducted with staff and service-users at a recovery-oriented inpatient service in the United Kingdom. Data was analysed using framework analysis. Findings Analysis of research interview data identified three subcategories grouped under the category of choice. These categories were: a delicate balancing act, acceptability of choices, and social issues impacting choice. Discussion Staff were uncertain of their role in promoting choice, resulting in service-users feeling unsupported in their recovery. Staff had to adopt a titrated approach to social inclusion, to protect service-users from discrimination and rejection. Implications Mental health professionals need to take a more proactive role in enabling service-users to realise their social aspirations, as well as managing any adverse impacts of stigma and discrimination

    Expressiveness Results for Timed Modal Mu-Calculi

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    This paper establishes relative expressiveness results for several modal mu-calculi interpreted over timed automata. These mu-calculi combine modalities for expressing passage of (real) time with a general framework for defining formulas recursively; several variants have been proposed in the literature. We show that one logic, which we call Lν,μrelL^{rel}_{\nu,\mu}, is strictly more expressive than the other mu-calculi considered. It is also more expressive than the temporal logic TCTL, while the other mu-calculi are incomparable with TCTL in the setting of general timed automata

    Nathan Sauer Interview 2019

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    This is an interview with Nathan Sauer, Classroom and University Technology and Support at Western Oregon University. He discusses how he came to work for Western Oregon University, and what his day-to-day duties are. He discusses how his job has evolved over the years, and what his goals are for his continued service. Mr. Sauer has a unique and worthwhile point of view on the University

    Hiding Resources that Can Fail

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    In earlier work, we presented a process algebra, PACSR, that uses resource failures to capture probabilistic behavior in reactive systems. In this paper, we explore the effects of resource failures in the situation where resources may be hidden from the environment. For this purpose, we introduce a subset of PACSR, called PACSR-lite, that allows us to isolate the issues surrounding resource hiding, and we provide a sound and complete axiomatization of strong bisimulation for this fragment

    Movement of palladium nanoparticles in hollow graphitised nanofibres: the role of migration and coalescence in nanocatalyst sintering during the Suzuki–Miyaura reaction

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    The evolution of individual palladium nanoparticle (PdNP) catalysts, in graphitised nanofibres (GNF), in the liquid-phase Suzuki-Miyaura (SM) reaction has been appraised. The combination of identical location-transmission electron microscopy (IL-TEM) and a nano test tube approach allowed spatiotemporal continuity of observations at single nanopartcile level, revealing that migration and coalescence is the most significant pathway to coarsening of the nanocatalyst, rather than Ostwald ripening. IL-TEM gave unprecedented levels of detail regarding the movement of PdNP on carbon surfaces at the nanoscale, including size-dependent migration and directional movement, opening horizons for optimisation of future catalysts through surface morphology design

    Formation of hollow carbon nanoshells from thiol stabilised silver nanoparticles via heat treatment

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    Uniform, less 10 nm sized, hollow carbon nano-shells (HCNS) have been prepared via a single-step, thermal treatment of alkanethiol stabilised Ag nanoparticles (TS-AgNP). Direct evidence for the formation of spherical HCNS from TS-AgNP is provided by in situ MEMS heating on Si3N4 supports within a TEM, and ex situ thermal processing of TS-AgNP on carbon nanotube supports. A mechanism is proposed for the thermally driven, templated formation of HCNS from the TS-AgNP stabilising layer, with Ag catalysing the graphitisation of carbon in advance of thermally induced AgNP template removal. This facile processing route provides for excellent size control of the HCNS product via appropriate AgNP template selection. However, a rapid rate of heating was found to be crucial for the formation of well-defined HCNS, whilst a slow heating rate gave a much more disrupted product, comprising predominantly lacy carbon with decreased levels of graphitic ordering, reflecting a competition between the thermal transformation of the TS-layer and the rate of removal of the AgNP template

    Molybdenum dioxide in carbon nanoreactors as a catalytic nanosponge for the efficient desulfurization of liquid fuels

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    The principle of a “catalytic nanosponge” that combines the catalysis of organosulfur oxidation and sequestration of the products from reaction mixtures is demonstrated. Group VI metal oxide nanoparticles (CrOx, MoOx, WOx) are embedded within hollow graphitized carbon nanofibers (GNFs), which act as nanoscale reaction vessels for oxidation reactions used in the decontamination of fuel. When immersed in a model liquid alkane fuel contaminated with organosulfur compounds (benzothiophene, dibenzothiophene, dimethyldibenzothiophene), it is found that MoO2@GNF nanoreactors, comprising 30 nm molybdenum dioxide nanoparticles grown within the channel of GNFs, show superior abilities toward oxidative desulfurization (ODS), affording over 98% sulfur removal at only 5.9 mol% catalyst loading. The role of the carbon nanoreactor in MoO2@GNF is to enhance the activity and stability of catalytic centers over at least 5 cycles. Surprisingly, the nanotube cavity can selectively absorb and remove the ODS products (sulfoxides and sulfones) from several model fuel systems. This effect is related to an adsorptive desulfurization (ADS) mechanism, which in combination with ODS within the same material, yields a “catalytic nanosponge” MoO2@GNF. This innovative ODS and ADS synergistic functionality negates the need for a solvent extraction step in fuel desulfurization and produces ultralow sulfur fuel

    Steric and electronic control of 1,3-dipolar cycloaddition reactions in carbon nanotube nanoreactors

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    The use of single-walled carbon nanotubes as effective nanoreactors for preparative bimolecular reactions has been demonstrated for the first time. We show that the extreme spatial confinement of guest reactant molecules inside host carbon nanotubes increases the regioselectivity for 1,4-triazole in thermally initiated azide–alkyne cycloaddition reactions. Through comparison of the internal dimensions of the nanotube and the steric bulk of the reactants, we demonstrate that the formation of the more linear 1,4-regioisomer can be enhanced by up to 55% depending on the extent of spatial restrictions imposed within the nanoreactors. Furthermore, through systematic variation of the substituents in the para-position of the alkyne reactants, we reveal the unexpected influence of the reactants’ electronic properties on the regioselectivity of reactions within nanoreactors, which act to either oppose or promote the preferential formation of the 1,4-regioisomer induced by steric effects, reflecting the unique ability of carbon nanotubes to stabilize the dipole moment of confined reactants. Thus, we show that the observed regioselectivity of azide–alkyne cycloaddition reactions confined within carbon nanotube nanoreactors reflects a subtle interplay between both steric and electronic factors
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