Cosmic ray intensity and the tilt of the neutral sheet

Recent publications have related long-term variations in cosmic ray intensity at the Earth with long term variations in the tilt of the neutral sheet in the inner heliosphere. The tilt of the neutral sheet from 1971 to 1974 is compared with the cosmic ray intensity at Earth, recorded by the Mt. Washington neutron monitor. The remarkable large decreases in cosmic ray intensity which occurred in 1973 and 1974 correlate well with excursions in the tilt of the neutral sheet which occurred earlier during these same two years

Green walking groups: A mixed-methods review of the mental health outcomes for adults with mental health problems

INTRODUCTION: Evidence suggests group walking in natural environments is more beneficial to the general population’s mental health than walking indoors, in urban environments, and alone. Such ‘green walking groups’ have been suggested as an occupational therapy intervention that could be suitable for adults with mental health problems. However, there have been no reviews of the mental health outcomes of participating in green walking groups for this population. METHOD: A mixed-methods literature review was conducted. A range of databases was systematically searched electronically. Papers that met pre-defined inclusion criteria were selected, critically appraised, and qualitative and quantitative data were extracted. Thematic analysis was used to identify key qualitative outcomes. FINDINGS: Six papers were included and eight mental health outcomes identified. The evidence suggests participants can experience connections with other people, connections with nature, and a sense of freedom. There is some limited evidence to support improvements to mood, self-esteem, reflection on life tasks, and symptoms of depression, with mixed evidence for experiencing a sense of achievement. CONCLUSION: This review can be used to build the evidence base for the link between occupation and mental health, and inform the clinical decision-making of occupational therapists, who are well-placed to design and implement green walking groups

Speckle techniques for determining stresses in moving objects

Laser speckle interferometry is a relatively new experimental technique which shows promise of alleviating many difficult problems in experimental mechanics. The method utilizes simple high-resolution photographs of the surface which is illuminated by coherent light. The result is a real-time or permanently stored whole-field record of interference fringes which yields a map of displacements in the object. In this thesis, the time-average theory using the Fourier transform is developed to present the application of this technique to measurement of in-plane displacement induced by the vibration of an object

Creep analysis of fuel plates for the Advanced Neutron Source

The reactor for the planned Advanced Neutron Source will use closely spaced arrays of fuel plates. The plates are thin and will have a core containing enriched uranium silicide fuel clad in aluminum. The heat load caused by the nuclear reactions within the fuel plates will be removed by flowing high-velocity heavy water through narrow channels between the plates. However, the plates will still be at elevated temperatures while in service, and the potential for excessive plate deformation because of creep must be considered. An analysis to include creep for deformation and stresses because of temperature over a given time span has been performed and is reported herein

Dynamic pressure approach to analysis of reactor fuel plate stability

The dynamic pressure model can conveniently be used to evaluate the critical stress regions as a function of flow velocity. For some of the preliminary advanced neutron source reactor plate designs this could be very significant since the flow velocity could be limited by peak stresses in the plates more than by deflection or stability. The dynamic pressure results predicts the differential pressure across a plate as a function of flow velocity. The pressure differential can then be used to find the deflection and/or stress of the plate using traditional plate analyses. Instability would occur when plates are touching at mid-channel such that rapid oscillations of pressure can occur. The technique is conservative and gives a design limit for the plate. This model is one of several methods being used in the design of the ANS fuel elements. 10 refs., 4 figs

Community occupational therapy for people with dementia and their family carers: A national survey of United Kingdom occupational therapy practice

Introduction: A national survey was conducted with United Kingdom (UK) occupational therapists to scope occupational therapy service provision for people with dementia and their family carers in the community. / Method: This was an online questionnaire with topics on occupational therapists’ roles, service provision, referral, assistive technology and assessment tools. Recruitment was through direct invitation, and promotion via occupational therapy networks, websites and newsletters. / Results: A total of 197 responded. Occupational therapy referrals most commonly came from the multidisciplinary team. Over half primarily undertook profession-specific work, with occupational therapy assessments the most common profession-specific task. Two-thirds of referrals for initial assessments were for people with mild-to-moderate dementia. A median of 2.5 hours for assessment/intervention was spent for each person with dementia. Almost two-thirds used the Model of Human Occupation Screening Tool. Most could prescribe personal activities of daily living equipment and Telecare, with few able to prescribe equipment for reminiscence or leisure. / Conclusion: This national survey increases knowledge of UK community occupational therapy practice and service provision for people with dementia and their family carers. It informs occupational therapists about national trends within this practice area, and development of the community occupational therapy intervention (COTiD-UK) as part of the Valuing Active Life in Dementia research programme

Enablers and challenges to occupational therapists’ research engagement: A qualitative study

Introduction: To develop occupational therapy’s evidence base and improve its clinical outcomes, occupational therapists must increase their research involvement. Barriers to research consumption and leadership are well documented, but those relating to delivering research interventions, less so. Yet, interventions need to be researched within practice to demonstrate their clinical effectiveness. This study aims to improve understanding of challenges and enablers experienced by occupational therapists who deliver interventions within research programmes. Method: Twenty-eight occupational therapists who participated in the Valuing Active Life in Dementia (VALID) research programme reported their experiences in five focus groups. Data were analysed thematically to identify key and subthemes. Results: Occupational therapists reported that overwhelming paperwork, use of videos, recruitment and introducing a new intervention challenged their research involvement, whereas support, protected time and a positive attitude enabled it. The impact of these challenges and enablers varied between therapists and organisations. Conclusion: Challenges and enablers to research involvement can be identified but must be addressed within individual and organisational contexts. Multifaceted collective action to minimise challenges and maximise enablers can facilitate clinicians’ involvement in research. Using this approach should enable occupational therapists to increase their research involvement, thus demonstrating the clinical effectiveness of their interventions

Measuring fidelity of delivery of the Community Occupational Therapy in Dementia-UK intervention

BACKGROUND: Interpreting data about intervention effectiveness requires an understanding of which intervention components were delivered and whether they were delivered as planned (fidelity of delivery). These studies aimed to develop a reliable measure for assessing fidelity of delivery of the Community Occupational Therapy in Dementia-UK intervention (COTiD-UK) (Study 1) and measure fidelity of delivery of COTiD-UK across sessions, sites and occupational therapists (Study 2). METHODS: The studies used a longitudinal observational design nested within a multi-site randomised controlled trial. Where practicable, all intervention sessions were audio-recorded. Fidelity checklists and coding guidelines were developed, piloted and refined until good agreement was achieved between two coders. Ten percent of sessions were purposively sampled from 12 sites and 31 occupational therapists. Transcripts were coded using checklists developed in Study 1; 10% of sets of intervention session transcripts were double coded to ensure that agreement was maintained. Percentages of components that were delivered were calculated for each session, site and occupational therapist. RESULTS: A reliable measure of fidelity of delivery for COTiD-UK was developed after several rounds of piloting and amendments. COTiD-UK was delivered with moderate fidelity across all six sessions (range: 52.4-75.5%). The mean range of fidelity varied across sites (26.7-91.2%) and occupational therapists (26.7-94.1%). CONCLUSIONS: A reliable, systematic method for measuring fidelity of delivery of COTiD-UK was developed and applied, and can be adapted for use in similar interventions. As COTiD-UK was delivered with moderate fidelity, there is a reasonable degree of confidence that intervention effects were attributable to COTiD-UK

North-South Distribution of Solar Flares during Cycle 23

In this paper, we investigate the spatial distribution of solar flares in the northern and southern hemisphere of the Sun that occurred during the period 1996 to 2003. This period of investigation includes the ascending phase, the maximum and part of descending phase of solar cycle 23. It is revealed that the flare activity during this cycle is low compared to previous solar cycle, indicating the violation of Gnevyshev-Ohl rule. The distribution of flares with respect to heliographic latitudes shows a significant asymmetry between northern and southern hemisphere which is maximum during the minimum phase of the solar cycle. The present study indicates that the activity dominates the northern hemisphere in general during the rising phase of the cycle (1997-2000). The dominance of northern hemisphere is shifted towards the southern hemisphere after the solar maximum in 2000 and remained there in the successive years. Although the annual variations in the asymmetry time series during cycle 23 are quite different from cycle 22, they are comparable to cycle 21.Comment: 6 pages, 2 figures, 1 table; Accepted for the publication in the proceedings of international solar workshop held at ARIES, Nainital, India on "Transient Phenomena on the Sun and Interplanetary Medium" in a special issue of "Journal of Astrophysics and Astronomy (JAA)