Highly Active W2C-Based Composites for the HER in Alkaline Solution: the Role of Surface Oxide Species

The hydrogen evolution reaction (HER) is a crucial electrochemical process for the proposed hydrogen economy since it has the potential to provide pure hydrogen for fuel cells. Nowadays, hydrogen electroproduction is considerably expensive, so promoting the development of new non-noble catalysts for the cathode of alkaline electrolyzers appears as a suitable way to reduce the costs of this technology. In this sense, a series of tungsten-based carbide materials have been synthesized by the urea-glass route as candidates to improve the HER in alkaline media. Moreover, two different pyridinium-based ionic liquids were employed to modify the surface of the carbide grains and control the amount and nature of their surface species. The main results indicate that the catalyst surface composition is modified in the hybrid materials, which are then distinguished by the appearance of tungsten suboxide structures. This implies the action of ionic liquids as reducing agents. Consequently, differential electrochemical mass spectrometry (DEMS) is used to precisely determine the onset potentials and rate-determining steps (RDS) for the HER in alkaline media. Remarkably, the modified surfaces show high catalytic performance (overpotentials between 45 and 60 mV) and RDS changes from Heyrovsky-Volmer to Heyrovsky as the surface oxide structures get reduced. H2O molecule reduction is then faster at tungsten suboxide, which allows the formation of the adsorbed hydrogen at the surface, boosting the catalytic activity and the kinetics of the alkaline HER.

Moving into new housing designed for people with disability: preliminary evaluation of outcomes

PURPOSE

To assess the change in individual outcomes for people with disability and complex needs after moving into newly built, individualised apartments in the community.

METHODS

People with disability (neurological disorder or cerebral palsy) and complex needs (n = 15, aged 18-65 years) completed quantitative self-report measures over two time-points (pre-move and 6-24 months post-move). Pre-move living arrangements included group homes, residential aged care, private rentals, and living with parents. Post-move living arrangements were individualised apartments built for people with disability. Health, wellbeing, community integration, and support needs were compared across pre- and post-move timepoints.

RESULTS

Paired sample t-tests showed significant improvements consistent with large effects in wellbeing (p = 0.031, Eta²=0.29) and community integration (p = 0.008, Eta²=0.41), particularly home integration, and a trend towards improved health (p = 0.077, Eta²=0.21). A Wilcoxon signed rank test demonstrated a trend towards reduced support needs (z= -1.941, p = 0.052) consistent with a medium effect (r = 0.35) and an average decrease of 2.4 support hours per participant per day.

CONCLUSIONS

Well-located housing with appropriate design, technology and support provision makes a positive contribution to wellbeing, community integration, and health for people with complex disability. Implications for rehabilitationPeople with disability who move into individualised apartments experience significant positive change in health, wellbeing, and participation.Findings highlight the benefits of housing that foster independence and enable personal choice and control.Evidence suggests that investment in appropriately designed and well-located housing has positive outcomes for people with disability.Evidence collected within this outcome framework has the potential to ensure models of housing and support that are responsive to the diverse and changing needs of people with disability.

Do young people with neurological conditions in residential aged care use hospitals differently than those in the community? Evidence from Victorian hospital data, 2014-2017

This study describes the duration and reasons for hospitalisation for three cohorts of younger adults with neurological conditions who either used residential aged care (RAC) or lived in the community. Hospitalisations as a clinical event indicate conditions for which younger people in RAC may need support as they move into community-based housing. Data describing 3 years of hospitalisations in Victorian public hospitals and emergency departments were used. The neurological conditions occurring among the three cohorts include (1) Cerebral Vascular Accident (CVA), (2) Traumatic Brain Injury (TBI) and (3) Multiple Sclerosis (MS). Frequency of hospitalisation, length of stay and leading causes of potentially preventable hospitalisations were examined. Two hundred and fifty-two (2.7%) of 9333 patients hospitalised for these neurological conditions subsequently used RAC. Hospitalisations were more frequent for those using RAC compared to those living in the community for cohorts with CVA and TBI (6.26 vs. 2.65 events per person-year for CVA and 4.34 vs. 1.88 for TBI) while hospitalisations were more frequent among those in the community compared to those using RAC for the cohort living with MS (3.62 vs. 5.35 per person-year). However, for all the cohorts, the average length of acute hospital stays was longer among RAC users than among those in the community (19.6 vs. 6.2 days for CVA, 15.5 vs. 4.5 for TBI and 12.2 vs. 7.0 for MS). Leading causes for hospitalisation were complex comorbidities and changes in health status (such as seizures, ulcers, dehydration and cellulitis). Efforts should be made to design supports and proactively manage health needs leading to these hospitalisations.

Escitalopram administration, relearning, and neuroplastic effects: A diffusion tensor imaging study in healthy individuals

BACKGROUND

Neuroplastic processes are influenced by serotonergic agents, which reportedly alter white matter microstructure in humans in conjunction with learning. The goal of this double-blind, placebo-controlled imaging study was to investigate the neuroplastic properties of escitalopram and cognitive training on white matter plasticity during (re)learning as a model for antidepressant treatment and environmental factors.

METHODS

Seventy-one healthy individuals (age=25.6 ± 5.0, 43 females) underwent three diffusion magnetic resonance imaging scans: at baseline, after 3 weeks of associative learning (emotional/non-emotional content), and after relearning shuffled associations for an additional 3 weeks. During the relearning phase, participants received a daily dose of 10 mg escitalopram or placebo orally. Fractional anisotropy (FA), and mean (MD), axial (AD), and radial diffusivity (RD) were calculated within the FMRIB software library and analyzed using tract-based spatial statistics.

RESULTS

In a three-way repeated-measures marginal model with sandwich estimator standard errors, we found no significant effects of escitalopram and content on AD, FA, MD, and RD during both learning and relearning periods (p_FDR>0.05). When testing for escitalopram or content effects separately, we also demonstrated no significant findings (p_FDR>0.05) for any of the diffusion tensor imaging metrics.

LIMITATIONS

The intensity of the study interventions might have been too brief to induce detectable white matter changes.

DISCUSSION

Previous studies examining the effects of SSRIs on white matter tracts in humans have yielded inconclusive outcomes. Our results indicate that relearning under escitalopram does not affect the white matter microstructures in healthy individuals when administered for 3 weeks.

Incidence of Drug-Induced Delirium During Treatment With Antidepressants or Antipsychotics: A Drug Surveillance Report of German-Speaking Countries Between 1993 and 2016

OBJECTIVES

Successful treatment of delirium depends on the detection of the reversible contributors. Drugs with delirogenic properties are the most prevalent reversible cause of delirium.

METHODS

This observational study is based on data from Arzneimittelsicherheit in der Psychiatrie, a multicenter drug surveillance program in German-speaking countries recording severe adverse drug reactions (ADRs) in psychiatric inpatients. The present study analyzes drug-induced delirium (DID) during treatment with antidepressants and antipsychotics.

RESULTS

A total of 436 565 psychiatric inpatients were treated with antidepressants and/or antipsychotics during the observation period from 1993 to 2016 in the participating 110 hospitals. Overall, 254 cases (0.06% of all patients treated with antidepressants and/or antipsychotics) of DID were detected. Implicated either in combination or alone (multiple drugs were implicated in 70.1% of DID), clomipramine (0.24%), amitriptyline (0.21%), and clozapine (0.18%) showed the highest incidence rates of DID. When implicated alone (98 cases overall), clozapine (0.11%) followed by amitriptyline (0.05%) were most likely causally associated with the occurrence of DID. Drugs with strong antimuscarinic properties generally exhibited higher risk of DID.

CONCLUSIONS

With an incidence rate of <0.1%, the use of antidepressants and antipsychotics was rarely associated with DID within the Arzneimittelsicherheit in der Psychiatrie program. Tricyclic antidepressants and clozapine were the most commonly implicated psychotropic drugs. These data support the specific role of antimuscarinic properties in DID.

Coexpression of Gene Transcripts with Monoamine Oxidase A Quantified by Human In Vivo Positron Emission Tomography

The monoamine oxidase A (MAO-A) is integral to monoamine metabolism and is thus relevant to the pathophysiology of various neuropsychiatric disorders; however, associated gene-enzyme relations are not well understood. This study aimed to unveil genes coexpressed with MAO-A. Therefore, 18 179 mRNA expression maps (based on the Allen Human Brain Atlas) were correlated with the cerebral distribution volume (VT) of MAO-A assessed in 36 healthy subjects (mean age ± standard deviation: 32.9 ± 8.8 years, 18 female) using [11C]harmine positron emission tomography scans. Coexpression analysis was based on Spearman's ρ, over-representation tests on Fisher's exact test with false discovery rate (FDR) correction. The analysis revealed 35 genes in cortex (including B-cell translocation gene family, member 3, implicated in neuroinflammation) and 247 genes in subcortex (including kallikrein-related peptidase 10, implicated in Alzheimer's disease). Significantly over-represented Gene Ontology terms included "neuron development", "neuron differentiation", and "cell-cell signaling" as well as "axon" and "neuron projection". In vivo MAO-A enzyme distribution and MAOA expression did not correlate in cortical areas (ρ = 0.08) while correlation was found in subcortical areas (ρ = 0.52), suggesting influences of region-specific post-transcriptional and -translational modifications. The herein reported information could contribute to guide future genetic studies, deepen the understanding of associated pathomechanisms and assist in the pursuit of novel therapeutic targets.

Neuroplastic effects of a selective serotonin reuptake inhibitor in relearning and retrieval

Animal studies using selective serotonin reuptake inhibitors (SSRIs) and learning paradigms have demonstrated that serotonin is important for flexibility in executive functions and learning. SSRIs might facilitate relearning through neuroplastic processes and thus exert their clinical effects in psychiatric diseases where cognitive functioning is affected. However, translation of these mechanisms to humans is missing. In this randomized placebo-controlled trial, we assessed functional brain activation during learning and memory retrieval in healthy volunteers performing associative learning tasks aiming to translate facilitated relearning by SSRIs.

To this extent, seventy-six participants underwent three MRI scanning sessions: (1) at baseline, (2) after three weeks of daily associative learning and subsequent retrieval (face-matching or Chinese character–noun matching) and (3) after three weeks of relearning under escitalopram (10 mg/day) or placebo. Associative learning and retrieval tasks were performed during each functional MRI (fMRI) session. Statistical modeling was done using a repeated-measures ANOVA, to test for content-by-treatment-by-time interaction effects.

During the learning task, a significant substance-by-time interaction was found in the right insula showing a greater deactivation in the SSRI cohort after 21 days of relearning compared to the learning phase. In the retrieval task, there was a significant content-by-time interaction in the left angular gyrus (AG) with an increased activation in face-matching compared to Chinese-character matching for both learning and relearning phases. A further substance-by-time interaction was found in task performance after 21 days of relearning, indicating a greater decrease of performance in the placebo group.

Our findings that escitalopram modulate insula activation demonstrates successful translation of relearning as a mechanism of SSRIs in human. Furthermore, we show that the left AG is an active component of correct memory retrieval, which coincides with previous literature. We extend the function of this region by demonstrating its activation is not only stimulus dependent but also time constrained. Finally, we were able to show that escitalopram aids in relearning, irrespective of content.

Factors that influence the quality of paid support for adults with acquired neurological disability: scoping review and thematic synthesis

PURPOSE

Theoretically, individualised funding schemes empower people with disability (PWD) to choose high quality support services in line with their needs and preferences. Given the importance of support, the aim of this scoping review was to understand the factors that influence the quality of paid disability support for adults with acquired neurological disability.

METHODS

A comprehensive scoping review of the published literature from 2009-2019 was conducted on five databases: Medline, CINAHL, Embase, PsycINFO and Scopus.

RESULTS

Of the 3391 records retrieved, 16 qualitative articles were eligible for review. Thematic synthesis of the findings revealed six key interrelated themes: (1) choice and control, (2) individualised support, (3) disability support worker (DSW) qualities, (4) DSW competence, (5) PWD - DSW relationship, and (6) accessing consistent support. The themes depict factors influencing the quality of paid disability support from the perspective of PWD, close others and DSWs.

CONCLUSIONS

Although the evidence base is sparse, the factors identified were in line with international rights legislation and policy ideals. The findings can provide insights to PWD hiring and managing support, and facilitate the delivery of quality disability support. Further research is required to understand the interactions between the factors and how to optimise support in practice.Implications for rehabilitationThe quality of paid disability support is determined by a multitude of interrelated factors influenced by the disability support worker's qualities and competencies, the interaction between the person with disability and the disability support worker, as well as external contextual factors.Optimising choice and control for adults with acquired neurological disability and providing individualised support should be a significant focus for disability support workers.Training modules for disability support workers can be informed by five of the identified themes: (1) choice and control, (2) individualised support, (3) DSW qualities, (4) DSW competence and (5) the relationship between PWD and DSWs.

A scoping review to explore the experiences and outcomes of younger people with disabilities in residential aged care facilities

OBJECTIVE

In Australia, over 6,000 adults younger than 65 have been inappropriately placed in nursing homes designed to accommodate older adults. The primary aim of this review was to map the literature on the experiences and outcomes of young people with disability who are placed in aged care.

METHODS

A scoping review of the published literature from 2009-2018 was conducted using Embase, Medline, PsycINFO and Scopus.

RESULTS

Eleven articles were identified (7 qualitative, 3 mixed methods, 1 quantitative). Results demonstrated the inability of aged care facilities to meet the basic human needs of young people (e.g., privacy, physical, sexual, social, nutritional, emotional need) and highlighted the lack of choice young people with disability have in regards to rehabilitation and housing. There was limited data relating to the trajectory and support needs of young people placed in aged care facilities.

CONCLUSIONS

This review highlights the negative outcomes young people experience while living in aged care. Future research should investigate the trajectory and support needs of young people in aged care facilities. Systemic changes are required to meet the needs of young people with complex needs at risk of admission to aged care including timely rehabilitation and housing and support options.

Smart home and communication technology for people with disability: a scoping review

PURPOSE

The links between disability, activity limitation and participation restriction are well established. Recent and continued advancement of technology, particularly smart home and communication technologies, presents new ways in which some of the limitations and restrictions experienced by people with disabilities can be overcome. The aim of this scoping review was to explore the impact of smart home and communication technology on the outcomes of people with disabilities and complex needs.

METHOD

This review involved systematic searching of four databases, hand searches and data extraction. Eligibility criteria included [1] participant outcomes of [2] technology used within the home [3] among adults with a disability and complex needs.

RESULTS

Of the 2400 studies identified, 21 met our inclusion criteria. Studies were characterized by significant diversity in relation to disability and type of technology. Overall, technology appeared to improve independence, participation and quality of life among people with a disability and complex needs. Despite this, ethical considerations were raised given the vulnerability of this population, including potential risks through social participation and privacy concerns of using monitoring technology.

CONCLUSIONS

Smart home and communication technology can improve outcomes for people living with disabilities and complex needs. However, a number of factors impact the successful implementation of technology, including personalization, flexibility and ongoing support to the person with a disability and their close others. Future research should utilize high-quality study designs and established measures of important outcomes for this group.IMPLICATIONS FOR REHABILITATIONThere is a broad range of smart home and communication technology devices and systems available that may support the independence and participation of people with disabilities and complex needs; however, high-quality evidence documenting the impact of technology is lacking.Soft-technology supports, including assessment, training and evaluation of technology implementation, may play just as important a role in shaping outcomes as the technology itself.Systematic research is required to ensure there is quality evidence to inform investment in both technologies, and the soft-technology supports that promote its successful use.

The outcomes of individualized housing for people with disability and complex needs: a scoping review

PURPOSE

Worldwide, disability systems are moving away from congregated living towards individualized models of housing. Individualized housing aims to provide choice regarding living arrangements and the option to live in houses in the community, just like people without disability. The purpose of this scoping review was to determine what is currently known about outcomes associated with individualized housing for adults with disability and complex needs.

METHODS

Five databases were systematically searched to find studies that reported on outcomes associated with individualized housing for adults (aged 18-65 years) with disability and complex needs.

RESULTS

Individualized housing was positively associated with human rights (i.e., self-determination, choice and autonomy) outcomes. Individualized housing also demonstrated favourable outcomes in regards to domestic tasks, social relationships, challenging behaviour and mood. However, outcomes regarding adaptive behaviour, self-care, scheduled activities and safety showed no difference, or less favourable results, when compared to group homes.

CONCLUSIONS

The literature indicates that individualized housing has favourable outcomes for people with disability, particularly for human rights. Quality formal and informal supports were identified as important for positive outcomes in individualized housing. Future research should use clear and consistent terminology and longitudinal research methods to investigate individualized housing outcomes for people with disability.Implications for rehabilitationIndividualized housing models can foster self-determination, choice and autonomy for adults with disability and complex needs.Having alignment between paid and informal support is important for positive outcomes of individualized housing arrangements.A more substantial evidence base regarding individualized housing outcomes, in particular long-term outcomes, and outcomes for people with an acquired disability, is required.

Association of Protein Distribution and Gene Expression Revealed by PET and Post-Mortem Quantification in the Serotonergic System of the Human Brain

Regional differences in posttranscriptional mechanisms may influence in vivo protein densities. The association of positron emission tomography (PET) imaging data from 112 healthy controls and gene expression values from the Allen Human Brain Atlas, based on post-mortem brains, was investigated for key serotonergic proteins. PET binding values and gene expression intensities were correlated for the main inhibitory (5-HT1A) and excitatory (5-HT2A) serotonin receptor, the serotonin transporter (SERT) as well as monoamine oxidase-A (MAO-A), using Spearman's correlation coefficients (rs) in a voxel-wise and region-wise analysis. Correlations indicated a strong linear relationship between gene and protein expression for both the 5-HT1A (voxel-wise rs = 0.71; region-wise rs = 0.93) and the 5-HT2A receptor (rs = 0.66; 0.75), but only a weak association for MAO-A (rs = 0.26; 0.66) and no clear correlation for SERT (rs = 0.17; 0.29). Additionally, region-wise correlations were performed using mRNA expression from the HBT, yielding comparable results (5-HT1Ars = 0.82; 5-HT2Ars = 0.88; MAO-A rs = 0.50; SERT rs = -0.01). The SERT and MAO-A appear to be regulated in a region-specific manner across the whole brain. In contrast, the serotonin-1A and -2A receptors are presumably targeted by common posttranscriptional processes similar in all brain areas suggesting the applicability of mRNA expression as surrogate parameter for density of these proteins.

Prevention of seasonal affective disorder in daily clinical practice: results of a survey in German-speaking countries

BACKGROUND

Seasonal affective disorder (SAD) is a seasonally recurrent type of major depression. This predictable aspect makes it promising for preventive treatment. However, evidence for the efficacy and harm of preventive treatment of SAD is scarce, as are recommendations from clinical practice guidelines. The aim of this study was to assess the current use of preventive treatment of SAD in clinical practice in German-speaking countries for the first time.

METHODS

We conducted a postal and web-based survey sent to the heads of all psychiatric institutions listed in the inventory "Deutsches Krankenhaus Adressbuch, 2015" that contains all psychiatric hospitals in Germany, Austria, and Switzerland.

RESULTS

One hundred institutions (out of 533 institutions, 19%), which treated in total more than 3100 SAD patients in the years 2014/2015, responded. Of those, 81 reported recommending preventive treatment to patients with a history of SAD. There was no consensus on the optimal starting point for preventive treatment. Most of the institutions that implemented prevention of SAD, recommended lifestyle changes (85%), antidepressants (84%), psychotherapy (73%), and light therapy (72%) to their patients. The situation was similar in northern and southern regions.

CONCLUSIONS

Most hospitals recommended the use of preventive treatment to SAD patients, although evidence on efficacy and harm is limited. A wide variety of interventions were recommended, although guidelines only include recommendations for acute treatment. To assist psychiatrists and patients in future decision making, controlled studies on preventive treatment for SAD that compare different interventions with one another are needed.

Revisiting adult neurogenesis and the role of erythropoietin for neuronal and oligodendroglial differentiation in the hippocampus

Recombinant human erythropoietin (EPO) improves cognitive performance in neuropsychiatric diseases ranging from schizophrenia and multiple sclerosis to major depression and bipolar disease. This consistent EPO effect on cognition is independent of its role in hematopoiesis. The cellular mechanisms of action in brain, however, have remained unclear. Here we studied healthy young mice and observed that 3-week EPO administration was associated with an increased number of pyramidal neurons and oligodendrocytes in the hippocampus of ~20%. Under constant cognitive challenge, neuron numbers remained elevated until >6 months of age. Surprisingly, this increase occurred in absence of altered cell proliferation or apoptosis. After feeding a ¹⁵N-leucine diet, we used nanoscopic secondary ion mass spectrometry, and found that in EPO-treated mice, an equivalent number of neurons was defined by elevated ¹⁵N-leucine incorporation. In EPO-treated NG2-Cre-ERT2 mice, we confirmed enhanced differentiation of preexisting oligodendrocyte precursors in the absence of elevated DNA synthesis. A corresponding analysis of the neuronal lineage awaits the identification of suitable neuronal markers. In cultured neurospheres, EPO reduced Sox9 and stimulated miR124, associated with advanced neuronal differentiation. We are discussing a resulting working model in which EPO drives the differentiation of non-dividing precursors in both (NG2+) oligodendroglial and neuronal lineages. As endogenous EPO expression is induced by brain injury, such a mechanism of adult neurogenesis may be relevant for central nervous system regeneration.

The Community Integration Questionnaire - Revised: Australian normative data and measurement of electronic social networking

BACKGROUND/AIM

Consideration of the relationship between meaningful participation, health and wellbeing underpins occupational therapy intervention, and drives measurement of community integration following acquired brain injury (ABI). However, utility of community integration measures has been limited to date by lack of normative data against which to compare outcomes, and none examine the growing use of electronic social networking (ESN) for social participation. This research had four aims: (i) develop and pilot items assessing ESN to add to the Community Integration Questionnaire, producing the Community Integration Questionnaire-Revised (CIQ-R); (ii) examine factor structure of the CIQ-R; (iii) collect Australian CIQ-R normative data; and (iv) assess test-retest reliability of the revised measure.

METHODS

SETTING

Australia.

PARTICIPANTS

A convenience sample of adults without ABI (N = 124) was used to develop and pilot ESN items. A representative general population sample of adults without ABI aged 18-64 years (N = 1973) was recruited to gather normative CIQ-R data.

DESIGN

Cross-sectional survey.

MAIN MEASURES

Demographic items and the CIQ-R.

RESULTS

The CIQ-R demonstrated acceptable psychometric properties, with minor modification to the original scoring based on the factor analyses provided. Large representative general population CIQ-R normative data have been established, detailing contribution of a range of independent demographic variables to community integration.

CONCLUSION

The addition of electronic social networking items to the CIQ-R offers a contemporary method of assessing community integration following ABI. Normative CIQ-R data enhance the understanding of community integration in the general population, allowing occupational therapists and other clinicians to make more meaningful comparisons between groups.

Epidemiology and socioeconomic impact of seasonal affective disorder in Austria

BACKGROUND

Seasonal affective disorder (SAD) is a subtype of recurrent depressive or bipolar disorder that is characterized by regular onset and remission of affective episodes at the same time of the year. The aim of the present study was to provide epidemiological data and data on the socioeconomic impact of SAD in the general population of Austria.

METHODS

We conducted a computer-assisted telephone interview in 910 randomly selected subjects (577 females and 333 males) using the Seasonal Health Questionnaire (SHQ), the Seasonal Pattern Assessment Questionnaire (SPAQ), and the Sheehan Disability Scale (SDS). Telephone numbers were randomly drawn from all Austrian telephone books and transformed using the random last digits method. The last birthday method was employed to choose the target person for the interviews.

RESULTS

Out of our subjects, 2.5% fulfilled criteria for the seasonal pattern specifier according to DSM-5 and 2.4% (95% CI=1.4-3.5%) were diagnosed with SAD. When applying the ICD-10 criteria 1.9% (95% CI=0.9-2.8%) fulfilled SAD diagnostic criteria. The prevalence of fall-winter depression according to the Kasper-Rosenthal criteria was determined to be 3.5%. The criteria was fulfilled by 15.1% for subsyndromal SAD (s-SAD). We did not find any statistically significant gender differences in prevalence rates. When using the DSM-5 as a gold standard for the diagnosis of SAD, diagnosis derived from the SPAQ yielded a sensitivity of 31.8% and a specificity of 97.2%. Subjects with SAD had significantly higher scores on the SDS and higher rates of sick leave and days with reduced productivity than healthy subjects.

CONCLUSIONS

Prevalence estimates for SAD with the SHQ are lower than with the SPAQ. Our data are indicative of the substantial burden of disease and the socioeconomic impact of SAD. This epidemiological data shows a lack of gender differences in SAD prevalence. The higher rates of females in clinical SAD samples might, at least in part, be explained by lower help seeking behaviour in males.

Experimental Study of Spectral Properties of a Frenkel-Kontorova System

We report on microwave emission from linear parallel arrays of underdamped Josephson junctions, which are described by the Frenkel-Kontorova (FK) model. Electromagnetic radiation is detected from the arrays when biased on current singularities (steps) appearing at voltages V(n)=Φ(0)(nc̅/L), where Φ(0)=2.07×10(-15)  Wb is the magnetic flux quantum, and c̅, L, and n are, respectively, the speed of light in the transmission line embedding the array, L its physical length, and n an integer. The radiation, detected at fundamental frequency c̅/2L when biased on different singularities, indicates shuttling of bunched 2π kinks (magnetic flux quanta). Resonance of flux-quanta motion with the small-amplitude oscillations induced in the arrays gives rise to fine structures in the radiation spectrum, which are interpreted on the basis of the FK model describing the resonance. The impact of our results on design and performances of new digital circuit families is discussed.

Cation stoichiometry and electrical transport properties of the NdGaO3/(0 0 1)SrTiO3 interface

The interface formed between two wide band-gap insulators, NdGaO3 and SrTiO3 renders metallic behavior, similar to the LaAlO3/SrTiO3 interface. The interface conductivity depends strongly upon oxygen pressure during growth of the NdGaO3 film and subsequent annealing in oxygen. The conductivity of a (10 uc) NdGaO3/SrTiO3 film, pulsed laser deposited at low (pO2 = 10(-4) mbar) oxygen pressure, vanishes after annealing at 600 °C in oxygen atmosphere. For a similar interface formed at high oxygen pressure (pO2 = 0.3 mbar), the metallic conductivity remains also after post annealing. Medium energy ion spectroscopy (MEIS) in random (non-channeling) direction showed that a substantial part of Ga is missing in films deposited at low pressure, while optimal stoichiometry is approached in films deposited at high pressure. Aligned (channeling) MEIS likewise show that the Ga/Nd ratio approaches the stoichiometric value as the pressure is increased from 10(-4) to 0.3 mbar. This is interpreted as due to gallium desorption from a growing film at high temperature and low oxygen pressure while the re-evaporation of gallium is considerably suppressed at higher pressure. We discuss the possible role of stoichiometry on electrical transport properties.

Global decrease of serotonin-1A receptor binding after electroconvulsive therapy in major depression measured by PET

Electroconvulsive therapy (ECT) is a potent therapy in severe treatment-refractory depression. Although commonly applied in psychiatric clinical routine since decades, the exact neurobiological mechanism regarding its efficacy remains unclear. Results from preclinical and clinical studies emphasize a crucial involvement of the serotonin-1A receptor (5-HT(1A)) in the mode of action of antidepressant treatment. This includes associations between treatment response and changes in 5-HT(1A) function and density by antidepressants. Further, alterations of the 5-HT(1A) receptor are consistently reported in depression. To elucidate the effect of ECT on 5-HT(1A) receptor binding, 12 subjects with severe treatment-resistant major depression underwent three positron emission tomography (PET) measurements using the highly selective radioligand [carbonyl-(11)C]WAY100635, twice before (test-retest variability) and once after 10.08±2.35 ECT sessions. Ten patients (~83%) were responders to ECT. The voxel-wise comparison of the 5-HT(1A) receptor binding (BP(ND)) before and after ECT revealed a widespread reduction in cortical and subcortical regions (P<0.05 corrected), except for the occipital cortex and the cerebellum. Strongest reductions were found in regions consistently reported to be altered in major depression and involved in emotion regulation, such as the subgenual part of the anterior cingulate cortex (-27.5%), the orbitofrontal cortex (-30.1%), the amygdala (-31.8%), the hippocampus (-30.6%) and the insula (-28.9%). No significant change was found in the raphe nuclei. There was no significant difference in receptor binding in any region comparing the first two PET scans conducted before ECT. This PET study proposes a global involvement of the postsynaptic 5-HT(1A) receptor binding in the effect of ECT.

Twenty years of the grey partridge population in the LAJTA Project (Western Hungary)

The Lajta Project covers 3,065 ha. Within this area crop cultivation is dominant. Fields are separated from each other by forest belts and tree rows, extending altogether over roughly 120 ha. This habitat structure characterized by cultivation of 12–15 field crops sustained partridge population with densities of 1.75 birds/km2 (1991). The Project started in 1991/1992 and aimed to increase the carrying capacity for grey partridge and other small game species living in the area. A full–time gamekeeper was employed and habitat improvements were initiated. Four years later, the breeding population increased to 10.1 birds/km2. Besides increased numbers of nesting pairs, the number of reared chicks also increased, from 5.1–11.2 individuals/km2 in 1990 to 27.3–38.4 individuals/km2 in 1994. However, field sizes did not change significantly. Although the lengths of field margins increased by approximately 25 % (from 82 m/ha to 115 m/ha) under the influence of habitat management, they still reached only half those found in the countries of Central Europe where private ownership of land properties is dominant. After the privatisation of fields in 1995 as part of the political change in Hungary —affecting approximately 50 % of the project area— the possibilities of habitat improvement decreased, and the technological pressure on large–scale farming area increased. Following these processes the grey partridge population again decreased to 1.43 birds/km2 in 1997. As a result of the new management strategy applied in the project since 1996 we observed a slow increase in the breeding population, which stabilized at around 5 birds/km2, between 2007 and 2009. The August density increased in the same period from 4.5 birds/km2 to 13–17 birds/km2. During the two decades in which this research was conducted, chick mortality and winter mortality were extremely high. The key factors influencing grey partridge population dynamics in our study area seem to be clutch and chick losses and winter mortality. To determine the relationship between environmental factors and the grey partridge population parameters, principal component analysis (PCA) was used. August grey partridge density was positively associated with ecotone density and bags of red fox and avian predators (magpie and hooded crow). The density of grey partridge in spring and August also correlated with feral dog bag and feral cat bag. Habitat parameters showed a positive correlation with the density of grey partridge both in spring and in August. The levels of abundance of feral dog and feral cat populations also correlated negatively with winter losses.

Electrical and structural properties of ABO3/SrTiO3 interfaces

Electrical transport and microstructure of interfaces between nm-thick films of various perovskite oxides grown by pulsed laser deposition (PLD) on TiO2- terminated SrTiO3 (STO) substrates are compared. LaAlO3/STO and KTaO3/STO interfaces become quasi-2DEG after a critical film thickness of 4 unit cell layers. The conductivity survives long anneals in oxygen atmosphere. LaMnO3/STO interfaces remain insulating for all film thicknesses and NdGaO3/STO interfaces are conducting but the conductivity is eliminated after oxygen annealing. Medium-energy ion spectroscopy and scanning transmission electron microscopy detect cationic intermixing within several atomic layers from the interface in all studied interfaces. Our results indicate that the electrical reconstruction in the polar oxide interfaces is a complex combination of different mechanisms, and oxygen vacancies play an important role.

Long-Term Accommodation and Support for People With Higher Levels of Challenging Behaviour

The purpose of the present article is to describe the issues associated with providing lifelong accommodation and support to people with severe brain injury, neurobehavioural disability, and overt challenging behaviours. In particular, the article focuses on two groups of people within an Australian context: (a) those who live in community settings but whose behaviour is not adequately managed even by specialist outreach behaviour management services, and (b) those who are confined to aged care residential facilities and who show challenging behaviour. These groups bring to the fore different lifelong behaviour management issues. At present, if community-based clients seriously offend or have an adequate psychiatric diagnosis, they may be placed in heavily secured psychiatric units or prison. Otherwise, by default, they will reside in less restrictive options such as family homes and shared supported accommodation. We will argue that the current service system lacks the ability to apply appropriate structure and control to many clients with serious challenging behaviours, and propose that specialised facilities would make an important addition to the service system. Conversely, young clients confined to residential aged care facilities live in impoverished environments that often contribute to challenging behaviour that can be enormously disruptive, distressing, and unsafe. We will review the recent Australian State and Federal Government initiative aimed at transitioning some young people out of nursing homes, and we raise considerations for future service development. There are many individuals with the potential to make significant gains in a tightly structured setting before returning to the community, while others will manage well with long-term placement in a setting designed for residents with neurobehavioural disability. Case studies and service data are used to support these arguments, and key elements of accommodation and rehabilitation models for those in need of long-term neurobehavioural support are described.

People Under 50 With Acquired Brain Injury Living in Residential Aged Care

Objectives:The aim of this article is to describe the characteristics, needs and preferences of people under 50 with an acquired brain injury (ABI) living in residential aged care in Victoria and examine implications for service development.Participants:Sixty-one people under 50 with an ABI living in residential aged care in the state of Victoria.Measures:Care and Needs Scale, Community Integration Questionnaire, Overt Behaviour Scale, Health of the Nation Outcome Scale — ABI Version, Role Checklist, Resident Choice Scale.Results:The younger people with ABI in this study were a diverse group with a complex range of health and support needs that were not being adequately met within residential aged care. Many people (44%) required the highest level of support, indicating they could not be left alone while 26% could be left for part of the day and overnight. Most people (81%) and their support networks indicated they would like to explore moving out from residential aged care into community accommodation settings.Conclusions:This article provides clear direction for the development of services to meet the care needs of this group, to enable them to participate in the life of the community and to pursue a lifestyle of choice.

Community Integration Following Severe Traumatic Brain Injury: Outcomes and Best Practice

Community integration is often cited as the ultimate aim of rehabilitation. However, outcome studies show that following severe traumatic brain injury (TBI), many people do not return to valued life roles or reach previous levels of integration within their community. More recent research, in association with extensive clinical experience, reveals significant variability in outcomes within this group. Although some people return to productive activity and maintain a network of family and friends, others lead lives characterised by boredom and loneliness. This paper has two aims. The first is to examine TBI community integration outcome literature and selected theoretical models. The second is to describe a Community Approach to Participation (CAP), an individualised and collaborative model of community-based practice, which endeavours to address the poor outcomes identified following TBI. The CAP will be illustrated in the detailed case study of Sarah.

Comparison of People With ABI Living in Two Accommodation Settings: Shared Supported Accommodation and Residential Aged Care

Background:People with severe acquired brain injury (ABI) often require high and ongoing levels of paid support, which is sometimes provided within a shared supported accommodation service (SSA). In Victoria there are more than 140 people with severe ABI living in shared supported accommodation services who have a similar level of disability as young people with ABI in residential aged care (RAC).Objectives:The aims of this article are twofold: (1) to describe the characteristics, support needs and level of community inclusion of people with an ABI living in shared SSA in Victoria and (2) to compare the characteristics, support needs, social contact, community integration and leisure participation of this group with a group of people with ABI under 50 years old living in RAC reported in a previous study.Participants:Information was obtained from SSA managers on 128 residents with an ABI, aged under 60 years, who were living in shared supported accommodation.Measures:Questionnaires were used to obtain information about the characteristics, support needs and occupational participation of participants. Support needs were measured utilising the Care and Needs Scale (CANS).Method:Questionnaires were sent to and completed by SSA managers.Results:Of the 39 SSA managers contacted, 32 provided information about the characteristics of 128 residents with ABI living in their facilities. While 72% of SSA residents accessed the community almost everyday or more often, 40% of this sample received a visit from a friend less often than once per year. Results of the CANS indicated that the SSA group required a similar level of support to the comparison group of people with ABI living in RAC, but went outside, participated in community based leisure activities, and visited friends significantly more often. There was no significant difference between the two groups in the frequency of visits to the facility from relatives or friends.Conclusion:Although the relationship between client outcomes and accommodation is a complex one, this study suggests that the type of accommodation and support has a significant impact on the frequency of community participation experienced people with ABI and high care needs.

The Community Approach to Participation: Outcomes Following Acquired Brain Injury Intervention

Objective: To investigate the participation outcomes of individuals with severe acquired brain injury (ABI) who were provided with up to 12 months of intervention based on the Community Approach to Participation (CAP). Method: A case series study design was undertaken with a total of 85 participants from two private practices specialising in community-based, CAP rehabilitation for people with severe ABI. Inclusion criteria were the person had sustained an acquired brain injury, was aged over 18 years and had received up to 12 consecutive months of CAP input from one of the two practices within a three-year period between January 2004 and January 2007. Twenty-six of the 85 participants were an average of 343 days post injury (Early group) and 59 of the participants were an average of 10.2 years post injury (Late group). They were living in a range of community environments and residential facilities. Initial participants were identified for the study in January 2005. Data were gathered using the Functional Independence Measure (FIM™), Community Integration Questionnaire (CIQ), and Role Checklist (RC Part 1) at two time points: prior to intervention (baseline), and after a 12-month period or at discharge (TI). Within the intervention period, all participants received a customised community occupational therapy (OT) rehabilitation program based on the key principles of the CAP. Intervention focused on participation goals of the individual, and development of the associated skills that underpinned valued role performance. Results: Participants each received an average of 51.01 hours of CAP OT during the 12-month period of intervention. Considerable improvement was seen in functional independence, community integration, and role participation after intervention in both the Early and Late groups. A statistically significant increase in FIM™ and CIQ total scores was found for all participants from Baseline to T1. The number of roles in which participants engaged increased on average by almost one role per participant following intervention, from a mean of 3.06 to 3.99. Increased participation in volunteer, home maintainer, participant in organisations and hobbyist roles were most common. Conclusion: Increased functional independence, community integration, and participation in both the Early and Late groups over a 12 month period demonstrates the potential for improved participation outcomes for people with complex needs following ABI, even many years post injury.

Long-Term Outcome Following Traumatic Brain Injury

Objectives: To investigate care needs, functional outcome, role participation and community integration approximately nine years following severe brain injury. To gain an understanding of the ongoing cost of care and support needs for this group. Participants: 13 individuals who had sustained an extremely severe traumatic brain injury (TBI), between 8 and 9 years previously participated in the study. These individuals were the remaining participants of a larger sample of consecutive admissions between 1996 and 1998 at Ivanhoe Manor Rehabilitation Hospital. Measures: Structured Interview, Functional Independence Measure, Community Integration Questionnaire, Care and Needs Scale and Role Checklist. Results: The majority of the participants were reported to have high support needs, with 6 participants (46%) requiring 24-hour support. Four participants were reported to able to be left alone for between a few hours per day to almost all week. Three participants reported that they were completely independent. The participant's characteristics are described in terms of functional independence, community integration and role participation. Overall care needs appear to have remained relatively stable between 2 and 9 years postinjury. However, there was a shift in the proportion of paid and gratuitous care over time, with a decrease in paid care and increased gratuitous care noted from the 2-year to long-term follow-up time points. Conclusions: Severe TBI has a long term influence on life roles, care needs and functional independence. The current study suggests that high care needs do not necessarily preclude participants from leading active lives and participating in valued life roles. The importance of social support in facilitating participation in activity and the potential issues for caregiver burden, given the increase in gratuitous care over time, should be acknowledged and further research in this area is recommended.

Changes in Care and Support Needs Following Community-Based Intervention for Individuals With Acquired Brain Injury

Objective:To examine the care and support and participation outcomes for individuals with severe Acquired Brain Injury (ABI) provided with three consecutive years of Community Approach to Participation (CAP) intervention.Method:A case series study design was undertaken with a total of 43 participants from two private occupational therapy practices specialising in community-based, CAP rehabilitation for people with severe ABI. Data were collected at four time points: January 2004 (Baseline), January 2005 (T1), January 2006 (T2), and January 2007 (T3) and included rating on the Care and Needs Scale (CANS); number of hours of paid and gratuitous weekly support; FIM™ and Community Integration Questionnaire scores; and number of current life roles (as recorded on Part 1 of the Role Checklist). Participants were an average of 6.73 years post injury and were living in a range of community environments and residential facilities.Results:There was considerable change in participants' CANS rating across the intervention period, with statistically significant decreases occurring from Baseline to T1 and T1 to T2. Ninety-five per cent of participants received some level of weekly paid support throughout the intervention period, with the amount varying considerably. Paid care decreased by an average of 10.78 hours per week from 85.85 hours per week at Baseline to 75.06 at T3. Although not statistically significant, this equated to an average cost saving of AU$324.84 per participant per week by the end of CAP intervention. There was an overall mean reduction of 4.96 hours of gratuitous care per week per participant over the intervention period, which was statistically significant. Increases in functional independence, community integration, and role participation were also found. On the FIM™, statistically significant improvement occurred between Baseline and T1 and on the CIQ between Baseline and T1 and T1 and T2. Significant increase on the Role Checklist occurred between Baseline and T1 and between T2 and T3. The number of life roles in which participants engaged increased by an average of 1.65 roles by the end of the intervention period. A reduction in care and support needs (measured by the CANS) was significantly associated with: (1) a reduction in total care hours, (2) and an increase in functional independence on the FIM™, and (3) an increase in community integration on the CIQ.Conclusion:With a long term approach and contextualised intervention targeted at skill development in the areas that underpin personally valued participation, increased role performance and community integration can be achieved by people with severe ABI, even many years post injury. This increased capacity has been found to be associated with a reduction in care and support needs, including paid and gratuitous care hours, over time.

Optimized transport properties of LaAlO₃/SrTiO₃ heterointerfaces by variation of pulsed laser fluence

We show the influence of pulsed laser deposition fluence on the transport properties of the LaAlO(3)/SrTiO(3) (LAO/STO) heterointerface. Structural characterization by x-ray diffraction and medium energy ion spectrometry enables us to deduce that the electronic behaviour is extremely sensitive to the stoichiometry of the LAO layer as well as the structural quality of the STO surface. An optimum balance of these two quantities is demonstrated for an intermediate laser fluence.

Moving from aged care facilities to community-based accommodation: outcomes and environmental factors

OBJECTIVE

Nearly 3500 people under 60 years of age are living in residential aged care in Australia, a situation which is generally recognized as incompatible with optimum quality of life. The objective of the current study is to explore the transition experiences of young people with acquired brain injury who have lived in aged care facilities and moved into community-based settings.

RESEARCH DESIGN

Grounded theory, qualitative design.

METHODS AND PROCEDURES

Semi-structured interviews were conducted with seven individuals with very severe ABI, seven family caregivers and two disability support workers. Each interview was recorded and transcribed verbatim.

RESULTS

Participants identified a range of positive outcomes that resulted from the transition from aged care settings to community living environments including increased independence in everyday activities, improved well-being and a greater degree of social inclusion. Participants also identified environmental factors that they deemed as crucial to facilitating positive outcomes.

CONCLUSIONS

People with very severe ABI have the potential to increase their level of independence in community-based accommodation settings; a potential that is not fostered in most aged care environments. The findings inform the outcome variables and environmental factors that should be measured in studies of transition from aged care to the community.

JS02-01 - Psychiatric intensive care

Psychiatric disorders per se or treatment resistance can cause life-threatening conditions. More than 25 years have passed since the term “psychiatric intensive care unit” (PICU) was introduced in the United Kingdom. This system is comprised of security units for psychiatric patients with suicidal or violent behaviour, providing a locked environment with more resources regarding personnel and care. The PICU concept at the Department of Psychiatry and Psychotherapy in Vienna, Austria, represents a progress towards optimal care of patients with serious psychiatric illnesses who also have critical somatic illnesses. One third of the patients are transferred from inpatient facilities of medical departments such as internal medicine, emergency medicine, trauma surgery or anesthesiology. Our PICU is dedicated to somatically, critically ill patients who have psychiatric symptoms (e.g., agition, aggression, impulsivity, delusions, catatonia, confusion, reduced consciousness, impaired self-reliance) complicating recovery from their critical, somatic condition. Generally, the dosages for antipsychotics are not higher than those at normal psychiatric wards. Benzodiazepine dosages of about 30mg diazepam equivalents per day are frequently used. In the years 2008 and 2009, 10% of all patients at the Viennese PICU were treated with electroconvulsive therapy. Delirium requires immediate therapy of underlying intracerebral pathologies, extracerebral illnesses or toxic features. Involuntary commitment, physical restraints and urinary catheterization were applied in approximately 50% of the patients, nasogastric tube or central venous catheter in 20%. In every case, intensive care nursing, monitoring of vital functions and specific experience at the interface between psychiatry and somatic medicine are required.

Intensive care in psychiatry

Psychiatric intensive care is supposed to offer treatment and to hold patients with psychiatric illness, if they pose a threat to themselves or to others. Besides treating the underlying psychiatric diagnoses, it is also necessary to take care of severe somatic comorbidity, which is often impeded by patients' limited ability to cooperate. Treatment often requires the administration of sedative medication and occasionally the use of medical restraints. Involuntary commitment, involuntary treatment and the usage of physical restraints is regulated by national mental health laws. Medical professionals working in the field of psychiatric intensive care must have expert knowledge in the fields of psychopharmacology and intensive care medicine. Treatment concepts should be aimed to provide optimized care for psychiatric inpatients in a potentially life-threatening phase of their illness. This article outlines current clinical practice at the psychiatric intensive care unit of the Medical University of Vienna (Austria). Furthermore, we present diagnoses, diagnostic procedures and specific treatments of a sample of 100 consecutive inpatients treated in the years 2008 and 2009 at this ward.