Cold water aquifer storage

A working prototype system is described in which water is pumped from an aquifer at 70 F in the winter time, chilled to a temperature of less than 50 F, injected into a ground-water aquifer, stored for a period of several months, pumped back to the surface in the summer time. A total of 8.1 million gallons of chilled water at an average temperature of 48 F were injected. This was followed by a storage period of 100 days. The recovery cycle was completed a year later with a total of 8.1 million gallons recovered. Approximately 20 percent of the chill energy was recovered

Story in health and social care

This paper offers a brief consideration of how narrative, in the form of people‟s own stories, potentially figures in health and social care provision as part of the impulse towards patient-centred care. The rise of the epistemological legitimacy of patients‟ stories is sketched here. The paper draws upon relevant literature and original writing to consider the ways in which stories can mislead as well as illuminate the process of making individual treatment care plans

Gauss Sums and Quantum Mechanics

By adapting Feynman's sum over paths method to a quantum mechanical system whose phase space is a torus, a new proof of the Landsberg-Schaar identity for quadratic Gauss sums is given. In contrast to existing non-elementary proofs, which use infinite sums and a limiting process or contour integration, only finite sums are involved. The toroidal nature of the classical phase space leads to discrete position and momentum, and hence discrete time. The corresponding `path integrals' are finite sums whose normalisations are derived and which are shown to intertwine cyclicity and discreteness to give a finite version of Kelvin's method of images.Comment: 14 pages, LaTe

Interface states in junctions of two semiconductors with intersecting dispersion curves

A novel type of shallow interface state in junctions of two semiconductors without band inversion is identified within the envelope function approximation, using the two-band model. It occurs in abrupt junctions when the interband velocity matrix elements of the two semiconductors differ and the bulk dispersion curves intersect. The in-plane dispersion of the interface state is found to be confined to a finite range of momenta centered around the point of intersection. These states turn out to exist also in graded junctions, with essentially the same properties as in the abrupt case.Comment: 1 figur

Using Palliative Care Needs Rounds in the UK for care home staff and residents: an implementation science study

Background: Care home residents often lack access to end-of-life care from specialist palliative care providers. Palliative Care Needs Rounds, developed and tested in Australia, is a novel approach to addressing this. Objective: To co-design and implement a scalable UK model of Needs Rounds. Design: A pragmatic implementation study using the integrated Promoting Action on Research Implementation in Health Services framework. Setting: Implementation was conducted in six case study sites (England, n = 4, and Scotland, n = 2) encompassing specialist palliative care service working with three to six care homes each. Participants: Phase 1: interviews (n = 28 care home staff, specialist palliative care staff, relatives, primary care, acute care and allied health practitioners) and four workshops (n = 43 care home staff, clinicians and managers from specialist palliative care teams and patient and public involvement and engagement representatives). Phase 2: interviews (n = 58 care home and specialist palliative care staff); family questionnaire (n = 13 relatives); staff questionnaire (n = 171 care home staff); quality of death/dying questionnaire (n = 81); patient and public involvement and engagement evaluation interviews (n = 11); fidelity assessment (n = 14 Needs Rounds recordings). Interventions: (1) Monthly hour-long discussions of residents\u27 physical, psychosocial and spiritual needs, alongside case-based learning, (2) clinical work and (3) relative/multidisciplinary team meetings. Main outcome measures: A programme theory describing what works for whom under what circumstances with UK Needs Rounds. Secondary outcomes focus on health service use and cost effectiveness, quality of death and dying, care home staff confidence and capability, and the use of patient and public involvement and engagement. Data sources: Semistructured interviews and workshops with key stakeholders from the six sites; capability of adopting a palliative approach, quality of death and dying index, and Canadian Health Care Evaluation Project Lite questionnaires; recordings of Needs Rounds; care home data on resident demographics/health service use; assessments and interventions triggered by Needs Rounds; semistructured interviews with academic and patient and public involvement and engagement members. Results: The programme theory: while care home staff experience workforce challenges such as high turnover, variable skills and confidence, Needs Rounds can provide care home and specialist palliative care staff the opportunity to collaborate during a protected time, to plan for residents\u27 last months of life. Needs Rounds build care home staff confidence and can strengthen relationships and trust, while harnessing services\u27 complementary expertise. Needs Rounds strengthen understandings of dying, symptom management, advance/anticipatory care planning and communication. This can improve resident care, enabling residents to be cared for and die in their preferred place, and may benefit relatives by increasing their confidence in care quality. Limitations: COVID-19 restricted intervention and data collection. Due to an insufficient sample size, it was not possible to conduct a cost-benefit analysis of Needs Rounds or calculate the treatment effect or family perceptions of care. Conclusions: Our work suggests that Needs Rounds can improve the quality of life and death for care home residents, by enhancing staff skills and confidence, including symptom management, communications with general practitioners and relatives, and strengthen relationships between care home and specialist palliative care staff. Future work: Conduct analysis of costs-benefits and treatment effects. Engagement with commissioners and policy-makers could examine integration of Needs Rounds into care homes and primary care across the UK to ensure equitable access to specialist care. Study registration: This study is registered as ISRCTN15863801. Funding: This award was funded by the National Institute for Health and Care Research (NIHR) Health and Social Care Delivery Research programme (NIHR award ref: NIHR128799) and is published in full in Health and Social Care Delivery Research; Vol. 12, No. 19. See the NIHR Funding and Awards website for further award information.Care home residents often lack access to end-of-life care from hospice teams and so may experience distressing symptoms at end of life if care home staff cannot fully meet their needs. We examined how an approach which worked well in Australia called ‘Palliative Care Needs Rounds’ (or ‘Needs Rounds’) could be used in the United Kingdom. We interviewed 28 people (care home staff, hospice staff and other National Health Service/social care professionals in the community) about their understanding of the United Kingdom setting, what might help trigger change and what results they would want. We discussed these interviews at online workshops with 43 people, where we started to develop a theory of ‘what would work, for whom, under what circumstances’ and determine what United Kingdom Needs Rounds would look like. Six specialist palliative care services, each partnered with three to six local care homes, used Needs Rounds for a year. We collected information on care home residents, staff experiences of using Needs Rounds, relatives’ perceptions of care quality, staff views of residents’ quality of death, and on their ability to provide a palliative approach to residents. We found that Needs Rounds can provide care home staff and specialist palliative care staff the opportunity to work together during a protected time, to plan for residents’ last months of life. Needs Rounds build care home staff confidence and can strengthen relationships and trust, while using each services’ expertise. Needs Rounds strengthen understandings of dying, symptom management, advance/anticipatory care planning and communication between care home staff, families, specialist palliative care staff and primary care. This improves the quality of resident care, enabling residents to be cared for and die in their preferred place, and also benefits relatives by increasing their confidence in care quality

Is worsening renal function an ominous prognostic sign in patients with acute heart failure? The role of congestion and its interaction with renal function.

BACKGROUND: Worsening renal function (WRF), traditionally defined as an increase in serum creatinine levels ≥0.3 mg/dL, is a frequent finding in patients with acute heart failure (AHF) and has been associated with poorer outcomes in some but not all studies. We hypothesized that these discrepancies may be caused by the interaction between WRF and congestion in AHF patients. METHODS AND RESULTS: We measured serum creatinine levels on a daily basis during the hospitalization and assessed the persistence of signs of congestion at discharge in 599 consecutive patients admitted at our institute for AHF. They had a postdischarge mortality and mortality or AHF readmission rates of 13% and 43%, respectively, after 1 year. Patients were subdivided into 4 groups according to the development or not of WRF and the persistence of ≥1 sign of congestion at discharge. Patients with WRF and no congestion had similar outcomes compared with those with no WRF and no congestion, whereas the risk of death or of death or AHF readmission was increased in the patients with persistent congestion alone and in those with both WRF and congestion (hazard ratio, 5.35; 95% confidence interval, 3.0-9.55 at univariable analysis; hazard ratio, 2.44; 95% confidence interval, 1.24-4.18 at multivariable analysis for mortality; hazard ratio, 2.14; 95% confidence interval, 1.39-3.3 at univariable analysis; and hazard ratio, 1.39; 95% confidence interval, 0.88-2.2 at multivariable analysis for mortality and rehospitalizations). CONCLUSIONS: WRF alone, when detected using serial serum creatinine measurements, is not an independent determinant of outcomes in patients with AHF. It has an additive prognostic value when it occurs in patients with persistent signs of congestion

RXTE Observations of 1A 1744-361: Correlated Spectral and Timing Behavior

We analyze Rossi X-ray Timing Explorer (RXTE) Proportional Counter Array (PCA) data of the transient low mass X-ray binary (LMXB) system 1A 1744-361. We explore the X-ray intensity and spectral evolution of the source, perform timing analysis, and find that 1A 1744-361 shows `atoll' behavior during the outbursts. The color-color diagram indicates that this LMXB was observed in a low intensity spectrally hard (low-hard) state and in a high intensity `banana' state. The low-hard state shows a horizontal pattern in the color-color diagram, and the previously reported `dipper QPO' appears only during this state. We also perform energy spectral analyses, and report the first detection of broad iron emission line and iron absorption edge from 1A 1744-361.Comment: 20 pages, 4 tables, 4 figures, accepted for publication in Ap