Unexpected results in asymptotically free quantum field theories

We study the behavior of asymptotically free (AF) spin and gauge models when their continuous symmetry group is replaced by different discrete non-Abelian subgroups. Precise numerical results with relative errors down to O(0.1%) suggest that the models with large subgroups are in the universality class of the underlying original models. We argue that such a scenario is consistent with the known properties of AF theories. The small statistical errors allow a detailed investigation of the cut-off effects also. At least up to correlation lengths ~300 they follow effectively an O(a) rather than the expected O(a^2) form both in the O(3) and in the dodecahedron model.Comment: 16 pages, 7 figures, some omissions corrected, a reference adde

Master Constraint Operator in Loop Quantum Gravity

We introduce a master constraint operator $\hat{\mathbf{M}}$ densely defined in the diffeomorphism invariant Hilbert space in loop quantum gravity, which corresponds classically to the master constraint in the programme. It is shown that $\hat{\mathbf{M}}$ is positive and symmetric, and hence has its Friedrichs self-adjoint extension. The same conclusion is tenable for an alternative master operator $\hat{\mathbf{M'}}$, whose quadratic form coincides with the one proposed by Thiemann. So the master constraint programme for loop quantum gravity can be carried out in principle by employing either of the two operators.Comment: 11 pages, significant modification in section 2, accepted for publication in Phys. Lett.

The design, delivery and impact of a Tier 1 Dementia Awareness training package delivered in the Thames Valley Region in England, UK

Objectives: As part of Health Education England’s (HEE) response to the 2014 Mandate, Health Education England Thames Valley (HEETV) commissioned four universities to undertake a multi-phase project. The University of West London, Oxford Brookes University, University of Bedfordshire and University of Northampton became partners in the Dementia Academic Action Group (DAAG). Phase 1 of the project consisted of a Scoping Review, reported through a poster at the 2016 ADI. This poster will focus on Phase 2 (design and delivery of the training package) and Phase 3 (evaluation of the impact of training). The DAAG has developed evidence based and quality assured training package based on recognised National UK standards such as Skills for Health Dementia Training Standards (2015). It has also been validated by the Alzheimer Society as meeting the standards for Dementia Friend’s training, and participants are eligible to register as a Dementia Friend on completion of the training. The package is mostly delivered in a 2 hour session, but can also be taken through 8 separate units of learning. A total of 1471 people attended the standard 2 hour training, delivered through 84 different sessions in 34 different venues across the region. Attendees represented a wide range of professionals, from porters, cooks and cleaners to nurses, pharmacists, therapists and doctors. Some sessions were uni- professional but, most had a professionally mixed audience. The number of trainees per session varied from 3 to 112. Subsequent to the training, quantitative and qualitative data was collected through evaluation questionnaires, combined with follow up online questionnaires and individual face to face or telephone interviews 6 weeks after the event. Over 85% of respondents to the follow up questionnaires and interviews reported improved skills, attitudes and confidence in working with people with dementia following the training. 70.2% indicated that they had been able to transfer some of what they had learned in the training to practice. Sustainability was ensured through the development of a trainers guide and ‘train the trainers’ events. The Tier 1 dementia awareness training package is now available for free from the Health Education England website, and it’s ongoing use is subject to continuing evaluation

reading At University a Guide For Student

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Absence of temporal ordering of apoptotic features in heat-shock treated leukemia and lymphoma cell lines

Apoptosis is a genetically defined response to physiological stimuli that results in cellular suicide. Features common to apoptotic cells include chromatin condensation, oligonucleosomal DNA fragmentation, membrane blebbing, nuclear destruction, and late loss of ability to exclude vital dyes. These characteristics contrast markedly from pathological necrosis, in which membrane integrity loss is demonstrated early, and other features of apoptosis, which allow a non-inflammatory removal of dead and dying cells, are absent. Using heat shock-induced apoptosis as a model for examining stress response in cells, we undertook to categorize a variety of human leukemias and lymphomas with regard to their response to heat shock. We were also interested in determining whether a common temporal order was followed in cells dying by apoptosis. In addition, based on our previous results, we investigated whether increasing heat load resulted in increased apoptosis, with particular interest in relatively resistant cell lines, or whether the mode of death changed from apoptosis to necrosis.</jats:p