University of Warwick

About: University of Warwick is a education organization based out in Coventry, Warwickshire, United Kingdom. It is known for research contribution in the topics: Population & White dwarf. The organization has 26212 authors who have published 77127 publications receiving 2666552 citations. The organization is also known as: Warwick University & The University of Warwick.

The mechanisms for pattern completion and pattern separation in the hippocampus

Abstract: The mechanisms for pattern completion and pattern separation are described in the context of a theory of hippocampal function in which the hippocampal CA3 system operates as a single attractor or autoassociation network to enable rapid, one-trial, associations between any spatial location (place in rodents, or spatial view in primates) and an object or reward, and to provide for completion of the whole memory during recall from any part. The factors important in the pattern completion in CA3 together with a large number of independent memories stored in CA3 include a sparse distributed representation which is enhanced by the graded firing rates of CA3 neurons, representations that are independent due to the randomizing effect of the mossy fibers, heterosynaptic long-term depression as well as long-term potentiation in the recurrent collateral synapses, and diluted connectivity to minimize the number of multiple synapses between any pair of CA3 neurons which otherwise distort the basins of attraction. Recall of information from CA3 is implemented by the entorhinal cortex perforant path synapses to CA3 cells, which in acting as a pattern associator allow some pattern generalization. Pattern separation is performed in the dentate granule cells using competitive learning to convert grid-like entorhinal cortex firing to place-like fields. Pattern separation in CA3, which is important for completion of any one of the stored patterns from a fragment, is provided for by the randomizing effect of the mossy fiber synapses to which neurogenesis may contribute, by the large number of dentate granule cells each with a sparse representation, and by the sparse independent representations in CA3. Recall to the neocortex is achieved by a reverse hierarchical series of pattern association networks implemented by the hippocampo-cortical backprojections, each one of which performs some pattern generalization, to retrieve a complete pattern of cortical firing in higher-order cortical areas.

Swift and NuSTAR observations of GW170817: Detection of a blue kilonova.

Abstract: With the first direct detection of merging black holes in 2015, the era of gravitational wave (GW) astrophysics began. A complete picture of compact object mergers, however, requires the detection of an electromagnetic (EM) counterpart. We report ultraviolet (UV) and x-ray observations by Swift and the Nuclear Spectroscopic Telescope Array of the EM counterpart of the binary neutron star merger GW170817. The bright, rapidly fading UV emission indicates a high mass (≈0.03 solar masses) wind-driven outflow with moderate electron fraction (Ye ≈ 0.27). Combined with the x-ray limits, we favor an observer viewing angle of ≈30° away from the orbital rotation axis, which avoids both obscuration from the heaviest elements in the orbital plane and a direct view of any ultrarelativistic, highly collimated ejecta (a γ-ray burst afterglow).

Critical success factors of TQM implementation in Hong Kong industries

Abstract: Total quality management (TQM) is an integrative management philosophy aimed at continuously improving the performance of products, processes and services to achieve and exceed customer expectations. This paper provides an empirical study on the identification of the critical success factors (CSFs) of TQM implementation in Hong Kong industries. Through a thorough and detailed analysis of the literature, 11 success factors with 72 elements were identified to develop a questionnaire. These items were empirically tested by data collected from 32 companies in Hong Kong. A factor analysis was carried out that identified seven CSFs with 38 elements of the implementation of TQM. These factors were shown to be reliable and valid and offer new insights into the understanding of TQM success factors in Hong Kong industries.

Theorising class, health and lifestyles: can Bourdieu help us?

Abstract: What is the relationship between class, health and life-styles, and to what extent does health-related knowledge influence subsequent behaviour? These issues have been a source of considerable debate for medical sociologists and others concerned with promoting ‘healthier’ life-styles over the years. Yet despite a wealth of empirical material, there has been little attempt to theorise this relationship between class, health and lifestyles and the associated issues of structure and agency, accounts and action it raises. This paper attempts to rectify this lacuna through a critical discussion of the work of Pierre Bourdieu, and its relevance to the class, health and life-styles debate. In particular, attention is paid to Bourdieu's analysis of the logic of practice, his concepts of habitus and bodily hexis, and the search for social distinction in the construction of (health-related) life-styles. The paper concludes with a critical commentary on these issues and the relative merits of Bourdieu's analysis for the sociology of health and illness. It is argued that despite certain limitations regarding issues of agency and ‘choice’, Bourdieu's analysis does indeed shed important light on the health and lifestyles debate, and that further bridge-building exercises of this nature between mainstream theory and the sociology of health and illness are both necessary and fruitful.

The effects of stress on surgical performance

Abstract: Background Although the general literature on stress and performance is extensive, little is known about specific effects of stress in surgical practice. This qualitative study explored key surgical stressors, their impact on performance, and coping strategies used by surgeons. Methods Individual in-depth semistructured interviews with surgeons were analyzed by 2 researchers independently. Key themes were discussed within the research team. Results Sixteen interviews were performed, including interviews with consultants (n = 9) and surgeons in training (n = 7). A wide range of intraoperative stressors was identified. Although stress had both positive and negative effects, undue levels of stress impaired judgment, decision making, and communication. Although junior surgeons showed uncertainty about their ability to cope, senior surgeons had developed sophisticated strategies for controlling each situation. Conclusions Although stress poses significant risks, coping strategies are not taught explicitly during surgical training. This article presents a framework for categorizing surgical stress and suggests key elements for effective coping strategies.