2,052 research outputs found
Rapid Field-Cycling MRI using Fast Spin-Echo
The author acknowledges funding from the EPSRC through the Centre for Doctoral Training in Integrated Magnetic Resonance.Non peer reviewedPublisher PD
Coping with a childhood brain tumour: A qualitative analysis of parents’ experiences
Pre-existing research on the stress reactions of caregivers of children with brain tumours was reviewed. Four overarching stress reactions were notably present for parents: burden from adjusting to changes in routine, burnout from fatigue and emotional exhaustion, residual stress from diagnosis and treatment, and future-oriented uncertainty. There is evidence to suggest that psychosocial implications for parents are a concern and that they require support from professionals long into the survival period. As part of the empirical research, ten parents of paediatric brain tumour survivors were retrospectively interviewed about their experiences of coping from diagnosis through to the survival period. Interviews were transcribed and four domains were devised from a thematic analysis: Focusing on the here-and-now in which parents concerned themselves with taking one day at a time rather than thinking about what may arise later; Overcoming helplessness reflected the desire to provide care-giving duties; Different needs met across the system included emotional bonding with other parents on the ward, whilst wanting family to offer respite; Finding a new normal featured in the survival period when parents reflected on new values for the family. Coping mechanisms were seen as a process, changing dependant on the time period. The literature review and empirical study are rounded off by a critical appraisal of the research process, which focuses on the clinical utility of working qualitatively with a paediatric brain tumour population, a discussion of homogeneity versus heterogeneity when sampling, and an appraisal of thematic analysis
Deuteron-equivalent and phase-equivalent interactions within light nuclei
Background: Phase-equivalent transformations (PETs) are well-known in quantum
scattering and inverse scattering theory. PETs do not affect scattering phase
shifts and bound state energies of two-body system but are conventionally
supposed to modify two-body bound state observables such as the rms radius and
electromagnetic moments. Purpose: In order to preserve all bound state
observables, we propose a new particular case of PETs, a deuteron-equivalent
transformation (DET-PET), which leaves unchanged not only scattering phase
shifts and bound state (deuteron) binding energy but also the bound state wave
function. Methods: The construction of DET-PET is discussed; equations defining
the simplest DET-PETs are derived. We apply these simplest DET-PETs to the
JISP16 interaction and use the transformed interactions in
calculations of H and He binding energies in the No-core Full
Configuration (NCFC) approach based on extrapolations of the No-core Shell
Model (NCSM) basis space results to the infinite basis space. Results: We
demonstrate the DET-PET modification of the scattering wave functions and
study the DET-PET manifestation in the binding energies of H and He
nuclei and their correlation (Tjon line). Conclusions: It is shown that some
DET-PETs generate modifications of the central component while the others
modify the tensor component of the interaction. DET-PETs are able to
modify significantly the scattering wave functions and hence the off-shell
properties of the interaction. DET-PETs give rise to significant changes
in the binding energies of H (in the range of approximately 1.5 MeV) and
He (in the range of more than 9 MeV) and are able to modify the correlation
patterns of binding energies of these nuclei
Simple algorithm for the correction of MRI image artefacts due to random phase fluctuations
Grant support: This work was supported by EPSRC [grant numbers EP/E036775/1, EP/K020293/1] and received funding from the European Union's Horizon 2020 research and innovation programme [grant agreement No 668119, project “IDentIFY”]Peer reviewedPublisher PD
Phase structures of strong coupling lattice QCD with overlap fermions at finite temperature and chemical potential
We perform the first study of lattice QCD with overlap fermions at finite
temperature and chemical potential . We start from the Taylor expanded
overlap fermion action, and derive in the strong coupling limit the effective
free energy by mean field approximation. On the () plane and in the
chiral limit, there is a tricritical point, separating the second order chiral
phase transition line at small and large , and first order chiral
phase transition line at large and small
Fast field-cycling NMR of cartilage : a way toward molecular imaging
Peer reviewedPublisher PD
Accelerated Field-Cycling MRI using Keyhole Imaging
Abstract 614Peer reviewedPublisher PD
Rapid Fast Field-Cycling Imaging using the Keyhole Technique
Peer reviewedPublisher PD
Detection of tissue remodelling by Fast Field-Cycling methods
Abstract 57Peer reviewedPublisher PD
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