Paul T. Callaghan

Learn More
Liaison mental health care has been an emerging specialism of mental health nursing in the UK since the early 1990s. Studies have so far looked only briefly at service user evaluation. A qualitative study involving 47 interviews with service user and professional stakeholders was undertaken to determine what is important to stakeholders in a liaison mental(More)
This paper reports the results of a literature review examining the effects of exercise on mental health and well-being. Throughout history many societies, ancient and modern, have used exercise as a means of preventing disease, and promoting health and well-being. There is evidence that exercise is beneficial for mental health; it reduces anxiety,(More)
In pulsed-gradient spin-echo NMR, one measures the dis-of rotational dipolar auto-correlation spectral density via the ''probe'' of the spin relaxation times, where T 1 samples at placement of nuclear spins over the time interval, D, between two gradient pulses, of duration d and amplitude g, positions v 0 and 2v 0 , while T 1r samples at v 1 and 2v 1. The(More)
The long time tail of molecular velocity correlation in a con"ned #uid: observation by modulated gradient spin-echo NMR Abstract In addition to the fast correlation for local stochastic motion the molecular velocity correlation function in a #uid enclosed within the pore boundaries features a slow long time tail decay [1,2]. This article presents a study by(More)
Two different multidimensional pulsed field gradient sequences are compared which have the purpose of correlating spin displacements in different time intervals with each other. The simplest possible sequence, three-pulse SERPENT, measures displacements in two interleaved time intervals, while in VEXSY, consisting of two independent pairs of gradient pulses(More)
Liaison mental health services (LMHS) developed originally to address the mental health needs of people with physical illnesses in general hospitals and more recently to work also with people with mental health problems presenting at non-mental health services. The purpose of the present paper was to review empirical research on the structure, process and(More)
The use of the pulsed gradient spin-echo sequence in NMR microscopy enables the measurement of molecular translational motion and simultaneous construction of velocity and self-diffusion images, a technique that has been termed dynamic NMR microscopy. In this method the PGSE contrast gradient is stepped in a fourth dimension (q space) and so is inherently(More)
We demonstrate the first two-dimensional correlation NMR (COSY) spectra obtained at ultra low frequencies (ULF) using the Earth's magnetic field. Using a specially developed spectrometer with multiple audio-frequency pulses under controlled pulse phase, we observe magnetisation transfer arising from heteronuclear J-couplings in trifluoroethanol and(More)
The Earth's magnetic field, though weak, is appealing for NMR applications because it is highly homogeneous, globally available and free. However, the practicality of Earth's field NMR (EFNMR) has long been limited by the need to perform experiments in outdoor locations where the local field homogeneity is not disrupted by ferrous or magnetic objects and(More)
Diffusion exchange of dextran with molecular weights 4.4 and 77 kDa through polyelectrolyte multilayer (PEM) hollow capsules consisting of four bilayers of polystyrene sulfonate/polydiallyldimethylammonium chloride has been investigated using two-dimensional nuclear-magnetic-resonance methods: diffusion-diffusion exchange spectroscopy (DEXSY) and(More)