Skip to main content

Research Repository

Advanced Search

All Outputs (201)

Dynamical systems applied to cosmology: dark energy and modified gravity (2018)
Journal Article
Bahamonde, S., Böhmer, C. G., Carloni, S., Copeland, E. J., Fang, W., & Tamanini, N. (2018). Dynamical systems applied to cosmology: dark energy and modified gravity. Physics Reports, 775-777, 1-122. https://doi.org/10.1016/j.physrep.2018.09.001

The Nobel Prize winning confirmation in 1998 of the accelerated expansion of our Universe put into sharp focus the need of a consistent theoretical model to explain the origin of this acceleration. As a result over the past two decades there has been... Read More about Dynamical systems applied to cosmology: dark energy and modified gravity.

Ultra-high-field arterial spin labeling MRI for non-contrast assessment of cortical lesion perfusion in multiple sclerosis (2018)
Journal Article
Drury, R. J., Falah, Y., Gowland, P. A., Evangelou, N., Bright, M. G., & Francis, S. T. (2019). Ultra-high-field arterial spin labeling MRI for non-contrast assessment of cortical lesion perfusion in multiple sclerosis. European Radiology, 29(4), 2027–2033. https://doi.org/10.1007/s00330-018-5707-5

Objectives Assess the feasibility of using an optimised ultra-high-field high-spatial-resolution low-distortion ASL MRI acquisition to measure focal haemodynamic pathology in cortical lesions (CLs) in Multiple Sclerosis (MS). Methods Twelve... Read More about Ultra-high-field arterial spin labeling MRI for non-contrast assessment of cortical lesion perfusion in multiple sclerosis.

Ultra-high-field arterial spin labelling MRI for non-contrast assessment of cortical lesion perfusion in multiple sclerosis (2018)
Journal Article
Dury, R. J., Falah, Y., Gowland, P. A., Evangelou, N., Bright, M. G., & Francis, S. T. (2019). Ultra-high-field arterial spin labelling MRI for non-contrast assessment of cortical lesion perfusion in multiple sclerosis. European Radiology, 29(4), 2027-2033. https://doi.org/10.1007/s00330-018-5707-5

© 2018, The Author(s). Objectives: To assess the feasibility of using an optimised ultra-high-field high-spatial-resolution low-distortion arterial spin labelling (ASL) MRI acquisition to measure focal haemodynamic pathology in cortical lesions (CLs)... Read More about Ultra-high-field arterial spin labelling MRI for non-contrast assessment of cortical lesion perfusion in multiple sclerosis.

A high electron mobility phonotransistor (2018)
Journal Article
Poyser, C. L., Li, L. H., Campion, R. P., Akimov, A. V., Linfield, E. H., Davies, A. G., …Kent, A. J. (2018). A high electron mobility phonotransistor. Communications Physics, 1, 1-7. https://doi.org/10.1038/s42005-018-0059-7

Acoustoelectric devices convert acoustic energy to electrical energy and vice versa. Devices working at much higher acoustic frequencies than those currently available have potential scientific and technological applications, e.g.: as detectors in ph... Read More about A high electron mobility phonotransistor.

Boltzmann equations for preheating (2018)
Journal Article
Emond, W. T., Millington, P., & Saffin, P. M. (2018). Boltzmann equations for preheating. Journal of Cosmology and Astroparticle Physics, 2018(09), doi:10.1088/1475-7516/2018/09/041

We derive quantum Boltzmann equations for preheating by means of the density matrix formalism, which account for both the non-adiabatic particle production and the leading collisional processes between the produced particles. In so doing, we illustra... Read More about Boltzmann equations for preheating.

MRI assessment of altered dynamic changes in liver haemodynamics following a meal challenge in compensated cirrhosis (2018)
Journal Article
Cox, E. F., Palaniyappan, N., Aithal, G. P., Guha, I. N., & Francis, S. T. (2018). MRI assessment of altered dynamic changes in liver haemodynamics following a meal challenge in compensated cirrhosis. European Radiology Experimental, 2, Article 26. https://doi.org/10.1186/s41747-018-0056-3

Background: To use magnetic resonance imaging (MRI) to dynamically assess postprandial changes in hepatic and collateral blood flow, liver perfusion and oxygenation in healthy participants and patients with liver disease with compensated cirrhosis (C... Read More about MRI assessment of altered dynamic changes in liver haemodynamics following a meal challenge in compensated cirrhosis.

Worldline sphaleron for thermal Schwinger pair production (2018)
Journal Article
Gould, O., Rajantie, A., & Xie, C. (2018). Worldline sphaleron for thermal Schwinger pair production. Physical Review D, 98(5), 056022. https://doi.org/10.1103/physrevd.98.056022

With increasing temperatures, Schwinger pair production changes from a quantum tunneling to a classical, thermal process, determined by a worldline sphaleron. We show this and calculate the corresponding rate of pair production for both spinor and sc... Read More about Worldline sphaleron for thermal Schwinger pair production.

Optical measurement of contact forces using frustrated total internal reflection (2018)
Journal Article
Sharp, J. S., Poole, S. F., & Kleiman, B. W. (2018). Optical measurement of contact forces using frustrated total internal reflection. Physical Review Applied, 10(3), Article 034051. https://doi.org/10.1103/physrevapplied.10.034051

A simple device based on the principle of frustrated total internal reflection is used to image the regions of contact between rubber objects and a large-area perspex waveguide. Measurements of the intensity of light scattered at the interface are fo... Read More about Optical measurement of contact forces using frustrated total internal reflection.

Unified Thermodynamic Uncertainty Relations in Linear Response (2018)
Journal Article
Macieszczak, K., Brandner, K., & Garrahan, J. P. (2018). Unified Thermodynamic Uncertainty Relations in Linear Response. Physical Review Letters, 121(13), https://doi.org/10.1103/physrevlett.121.130601

Thermodynamic uncertainty relations (TURs) are recently established relations between the relative uncertainty of time-integrated currents and entropy production in non-equilibrium systems. For small perturbations away from equilibrium, linear respon... Read More about Unified Thermodynamic Uncertainty Relations in Linear Response.

A magnified view of circumnuclear star formation and feedback around an active galactic nucleus at z = 2.6 (2018)
Journal Article
Geach, J. E., Ivison, R. J., Dye, S., & Oteo, I. (2018). A magnified view of circumnuclear star formation and feedback around an active galactic nucleus at z = 2.6. Astrophysical Journal Letters, 866(1), 1-7. https://doi.org/10.3847/2041-8213/aae375

We present Atacama Large Millimeter/submillimeter Array observations of an intrinsically radio-bright (L 1.4 GHz = (1.7 ± 0.1) × 1025 W Hz−1) and infrared luminous (L IR ≈ 1013 L ⊙) galaxy at z = 2.6. The infrared-to-radio luminosity ratio, q = 1.8,... Read More about A magnified view of circumnuclear star formation and feedback around an active galactic nucleus at z = 2.6.

SDSS-IV MaNGA: the formation sequence of S0 galaxies (2018)
Journal Article
Fraser-McKelvie, A., Aragon-Salamanca, A., Merrifield, M., Tabor, M., Bernardi, M., Drory, N., …Argudo-Fernandez, M. (2018). SDSS-IV MaNGA: the formation sequence of S0 galaxies. Monthly Notices of the Royal Astronomical Society, 481(4), 5580-5591. https://doi.org/10.1093/mnras/sty2563

Gas stripping of spiral galaxies or mergers are thought to be the formation mechanisms of lenticular galaxies. In order to determine the conditions in which each scenario dominates, we derive stellar populations of both the bulge and disk regions of... Read More about SDSS-IV MaNGA: the formation sequence of S0 galaxies.

Color gradients reflect an inside-out growth in early-type galaxies of the cluster MACS (2018)
Journal Article
Marian, V., Ziegler, B., Kuchner, U., & Verdugo, M. (2018). Color gradients reflect an inside-out growth in early-type galaxies of the cluster MACS. Astronomy and Astrophysics, 617, Article A34. https://doi.org/10.1051/0004-6361/201832750

Aims. Color gradients of galaxies are a powerful tool to resolve the variations of stellar populations within galaxies. We use this approach to explore the evolution of early-type galaxies in the core of the massive galaxy cluster MACS J1206.2-0847 a... Read More about Color gradients reflect an inside-out growth in early-type galaxies of the cluster MACS.

Cine MRI assessment of motility in the unprepared small bowel in the fasting and fed state: beyond the breath-hold (2018)
Journal Article
Hoad, C., Marciani, L., Spiller, R., Gowland, P., & Moran, G. (2019). Cine MRI assessment of motility in the unprepared small bowel in the fasting and fed state: beyond the breath-hold. Neurogastroenterology and Motility, 31(1), e13466. https://doi.org/10.1111/nmo.13466

Background The symptoms of functional bowel disorders are common in postprandial but investigations are generally undertaken in the fasted state using invasive procedures. MRI provides a noninvasive tool to study the gastrointestinal tract in an u... Read More about Cine MRI assessment of motility in the unprepared small bowel in the fasting and fed state: beyond the breath-hold.

Collisions of cosmic strings with chiral currents (2018)
Journal Article
Rybak, I., Avgoustidis, A., & Martins, C. (2018). Collisions of cosmic strings with chiral currents. Physical Review D, 98(6), Article 15. https://doi.org/10.1103/physrevd.98.063519

We present an analytic study of cosmic superconducting chiral string collisions in Minkowski space, applying the kinematic constraints that arise from the relevant generalization of the Nambu-Goto action. In particular, we revisit the solution for ch... Read More about Collisions of cosmic strings with chiral currents.

Gastric motor and sensory function in health assessed by magnetic resonance imaging: Establishment of reference intervals for the Nottingham test meal in healthy subjects (2018)
Journal Article
Parker, H., Hoad, C. L., Tucker, E., Costigan, C., Marciani, L., Gowland, P., & Fox, M. (2018). Gastric motor and sensory function in health assessed by magnetic resonance imaging: Establishment of reference intervals for the Nottingham test meal in healthy subjects. Neurogastroenterology and Motility, 30(12), Article e13463. https://doi.org/10.1111/nmo.13463

Background: Current investigations of gastric emptying rarely identify the cause of symptoms or provide a definitive diagnosis in patients with dyspepsia. This study assessed gastric function by magnetic resonance imaging (MRI) using the modular "Not... Read More about Gastric motor and sensory function in health assessed by magnetic resonance imaging: Establishment of reference intervals for the Nottingham test meal in healthy subjects.

Predicting residential building age from map data (2018)
Journal Article
Rosser, J., Boyd, D., Long, G., Zakhary, S., Mao, Y., & Robinson, D. (2019). Predicting residential building age from map data. Computers, Environment and Urban Systems, 73, 56-67. https://doi.org/10.1016/j.compenvurbsys.2018.08.004

The age of a building influences its form and fabric composition and this in turn is critical to inferring its energy performance. However, often this data is unknown. In this paper, we present a methodology to automatically identify the construction... Read More about Predicting residential building age from map data.

Holographic optical trapping Raman micro-spectroscopy for non-invasive measurement and manipulation of live cells (2018)
Journal Article
Sinjab, F., Awuah, D., Gibson, G., Padgett, M., Ghaemmaghami, A. M., & Notingher, I. (2018). Holographic optical trapping Raman micro-spectroscopy for non-invasive measurement and manipulation of live cells. Optics Express, 26(19), 25211-25225. https://doi.org/10.1364/oe.26.025211

We present a new approach for combining holographic optical tweezers with confocal Raman spectroscopy. Multiple laser foci, generated using a liquid-crystal spatial light modulator, are individually used for both optical trapping and excitation of sp... Read More about Holographic optical trapping Raman micro-spectroscopy for non-invasive measurement and manipulation of live cells.

Stellar kinematics from the symmetron fifth force in the Milky Way disk (2018)
Journal Article
O’Hare, C. A., & Burrage, C. (2018). Stellar kinematics from the symmetron fifth force in the Milky Way disk. Physical Review D, 98(6), Article 064019. https://doi.org/10.1103/PhysRevD.98.064019

It has been shown that the presence of nonminimally coupled scalar fields giving rise to a fifth force can noticeably alter dynamics on galactic scales. Such a fifth force must be screened in the Solar System but if unscreened it can have similar obs... Read More about Stellar kinematics from the symmetron fifth force in the Milky Way disk.

Galaxy structure in the ultraviolet: the dependence of morphological parameters on rest-frame wavelength (2018)
Journal Article
Mager, V. A., Conselice, C. J., Seibert, M., Gusbar, C., Katona, A. P., Villari, J. M., …Windhorst, R. A. (2018). Galaxy structure in the ultraviolet: the dependence of morphological parameters on rest-frame wavelength. Astrophysical Journal, 864(2), Article 123. https://doi.org/10.3847/1538-4357/aad59e

Evolutionary studies that compare galaxy structure as a function of redshift are complicated by the fact that any particular galaxy's appearance depends in part on the rest-frame wavelength of the observation. This leads to the necessity for a "morph... Read More about Galaxy structure in the ultraviolet: the dependence of morphological parameters on rest-frame wavelength.

A terahertz-driven non-equilibrium phase transition in a room temperature atomic vapour (2018)
Journal Article
Wade, C., Marcuzzi, M., Levi, E., Kondo, J., Lesanovsky, I., Adams, C., & Weatherill, K. (2018). A terahertz-driven non-equilibrium phase transition in a room temperature atomic vapour. Nature Communications, 9, 1-7. https://doi.org/10.1038/s41467-018-05597-4

There are few demonstrated examples of phase transitions that may be driven directly by terahertz frequency electric fields, and those that are known require field strengths exceeding 1 MV cm?1. Here we report a non-equilibrium phase transition drive... Read More about A terahertz-driven non-equilibrium phase transition in a room temperature atomic vapour.