All Outputs (2183)

Solving the puzzle of subhalo spins (2015)
Journal Article
Wang, Y., Lin, W., Pearce, F. R., Lux, H., Muldrew, S. I., & Onions, J. (2015). Solving the puzzle of subhalo spins. Astrophysical Journal, 801(2), Article 93. https://doi.org/10.1088/0004-637X/801/2/93

Investigating the spin parameter distribution of subhalos in two high-resolution isolated halo simulations, recent work by Onions et al. suggested that typical subhalo spins are consistently lower than the spin distribution found for field halos. To... Read More about Solving the puzzle of subhalo spins.

Sequestration of vacuum energy and the end of the universe (2015)
Journal Article
Kaloper, N., & Padilla, A. (2015). Sequestration of vacuum energy and the end of the universe. Physical Review Letters, 114(10), https://doi.org/10.1103/PhysRevLett.114.101302

Recently, we proposed a mechanism for sequestering the standard model vacuum energy that predicts that the Universe will collapse. Here we present a simple mechanism for bringing about this collapse, employing a scalar field whose potential is linear... Read More about Sequestration of vacuum energy and the end of the universe.

7 Tesla fMRI reveals systematic functional organization for binocular disparity in dorsal visual cortex (2015)
Journal Article
Sánchez-Panchuelo, R. M., Goncalves, N. R., Schluppeck, D., Ban, H., Sanchez-Panchuelo, R., Welchman, A. E., & Francis, S. T. (2015). 7 Tesla fMRI reveals systematic functional organization for binocular disparity in dorsal visual cortex. Journal of Neuroscience, 35(7), 3056-3072. https://doi.org/10.1523/JNEUROSCI.3047-14.2015

© 2015 the authors. The binocular disparity between the views of the world registered by the left and right eyes provides a powerful signal about the depth structure of the environment. Despite increasing knowledge of the cortical areas that process... Read More about 7 Tesla fMRI reveals systematic functional organization for binocular disparity in dorsal visual cortex.

Effects of white matter microstructure on phase and susceptibility maps (2015)
Journal Article
Wharton, S., & Bowtell, R. W. (in press). Effects of white matter microstructure on phase and susceptibility maps. Magnetic Resonance in Medicine, 173(3), https://doi.org/10.1002/mrm.25189

Purpose: To investigate the effects on quantitative susceptibility mapping (QSM) and susceptibility tensor imaging (STI) of the frequency variation produced by the microstructure of white matter (WM).

Methods: The frequency offsets in a WM tissue... Read More about Effects of white matter microstructure on phase and susceptibility maps.

Scaling behavior near jamming in random sequential adsorption (2015)
Journal Article
Purves, B., Reeve, L., Wattis, J. A., & Mao, Y. (2015). Scaling behavior near jamming in random sequential adsorption. Physical Review E, 91(2), Article 022118. https://doi.org/10.1103/PhysRevE.91.022118

For the Random Sequential Adsorption model, we introduce the ‘availability’ as a new variable corresponding to the number of available locations in which an adsorbate can be accommodated. We investigate the relation of the availability to the coverag... Read More about Scaling behavior near jamming in random sequential adsorption.

Supramolecular nesting of cyclic polymers (2015)
Journal Article
Kondratuk, D. V., Perdigão, L. M., Esmail, A. M., O'Shea, J. N., Beton, P. H., & Anderson, H. L. (2015). Supramolecular nesting of cyclic polymers. Nature Chemistry, 7(4), 317-322. https://doi.org/10.1038/nchem.2182

Advances in template-directed synthesis make it possible to create artificial molecules with protein-like dimensions, directly from simple components. These synthetic macromolecules have a proclivity for self-organization that is reminiscent of biopo... Read More about Supramolecular nesting of cyclic polymers.

Unitarity and the Vainshtein mechanism (2015)
Journal Article
Kaloper, N., Padilla, A., Saffin, P. M., & Stefanyszyn, D. (2015). Unitarity and the Vainshtein mechanism. Physical Review D, 91(4), https://doi.org/10.1103/PhysRevD.91.045017

We investigate low energy limits of massive gauge theories that feature the Vainshtein mechanism, focussing on the effects of the UV modes that are integrated out. It turns out that the Goldstone sectors are significantly influenced by the effects fr... Read More about Unitarity and the Vainshtein mechanism.

Simulated structure and imaging of NTCDI on Si(1 1 1)-7 × 7 : a combined STM, NC-AFM and DFT study (2015)
Journal Article
Jarvis, S. P., Sweetman, A., Lekkas, I., Champness, N. R., Kantorovich, L., & Moriarty, P. (2015). Simulated structure and imaging of NTCDI on Si(1 1 1)-7 × 7 : a combined STM, NC-AFM and DFT study. Journal of Physics: Condensed Matter, 27(5), Article 054004. https://doi.org/10.1088/0953-8984/27/5/054004

The adsorption of naphthalene tetracarboxylic diimide (NTCDI) on Si(1 1 1)-7 × 7 is investigated through a combination of scanning tunnelling microscopy (STM), noncontact atomic force microscopy (NC-AFM) and density functional theory (DFT) calculatio... Read More about Simulated structure and imaging of NTCDI on Si(1 1 1)-7 × 7 : a combined STM, NC-AFM and DFT study.

Optical spin-transfer-torque-driven domain-wall motion in a ferromagnetic semiconductor (2015)
Journal Article
Ramsay, A., Roy, P., Haigh, J., Otxoa, R., Irvine, A., Janda, T., …Wunderlich, J. (2015). Optical spin-transfer-torque-driven domain-wall motion in a ferromagnetic semiconductor. Physical Review Letters, 114(6), Article 067202. https://doi.org/10.1103/PhysRevLett.114.067202

We demonstrate optical manipulation of the position of a domain wall in a dilute magnetic semiconductor,GaMnAsP. Two main contributions are identified. First, photocarrier spin exerts a spin-transfer torque on the magnetization via the exchange inter... Read More about Optical spin-transfer-torque-driven domain-wall motion in a ferromagnetic semiconductor.

Explaining the proton radius puzzle with disformal scalars (2015)
Journal Article
Brax, P., & Burrage, C. (2015). Explaining the proton radius puzzle with disformal scalars. Physical Review D, D91(4), Article 043515. https://doi.org/10.1103/PhysRevD.91.043515

We analyze the consequences of a disformal interaction between a massless scalar and matter particles in the context of atomic physics. We focus on the displacement of the atomic energy levels that it induces, and in particular the change in the Lamb... Read More about Explaining the proton radius puzzle with disformal scalars.

Multipole moments in scalar-tensor theory of gravity (2015)
Journal Article
Pappas, G., & Sotiriou, T. P. (2015). Multipole moments in scalar-tensor theory of gravity. Physical Review D - Particles, Fields, Gravitation and Cosmology, 91, 1-12. https://doi.org/10.1103/PhysRevD.91.044011

Stationary, asymptotically flat spacetimes in general relativity can be characterized by their multipole moments. The moments have proved to be very useful tools for extracting information about the spacetime from various observables and, more recent... Read More about Multipole moments in scalar-tensor theory of gravity.

Coherent phonon optics in a chip with an electrically controlled active device (2015)
Journal Article

Phonon optics concerns operations with high-frequency acoustic waves in solid media in a similar way to how traditional optics operates with the light beams (i.e. photons). Phonon optics experiments with coherent terahertz and sub-terahertz phonons p... Read More about Coherent phonon optics in a chip with an electrically controlled active device.

Far-infrared observations of an unbiased sample of gamma-ray burst host galaxies (2015)
Journal Article
Kohn, S., Micha owski, M., Bourne, N., Baes, M., Fritz, J., Cooray, A., de Looze, I., De Zotti, G., Dannerbauer, H., Dunne, L., Dye, S., Eales, S., Furlanetto, C., Gonzalez-Nuevo, J., Ibar, E., Ivison, R., Maddox, S., Scott, D., Smith, D., Smith, M., …Valiante, E. (2015). Far-infrared observations of an unbiased sample of gamma-ray burst host galaxies. Monthly Notices of the Royal Astronomical Society, 448(2), https://doi.org/10.1093/mnras/stv088

Gamma-ray bursts (GRBs) are the most energetic phenomena in the Universe; believed to result from the collapse and subsequent explosion of massive stars. Even though it has profound consequences for our understanding of their nature and selection bia... Read More about Far-infrared observations of an unbiased sample of gamma-ray burst host galaxies.

Visualizing the 'invisible' (2015)
Journal Article
Moriarty, P. (2015). Visualizing the 'invisible'. Leonardo, 48(1), https://doi.org/10.1162/LEON_a_00897

The ability of scientists to image and manipulate matter at the (sub)atomic scale is a result of stunning advances in microscopy. Foremost amongst these was the invention of the scanning probe microscope, which, despite its classification as a micros... Read More about Visualizing the 'invisible'.

IGM constraints from the SDSS-III/BOSS DR9 Lyα forest transmission probability distribution function (2015)
Journal Article
Lee, K. G., Lee, K.-G., Hennawi, J., Spergel, D. N., Weinberg, D. H., Hogg, D. W., …Yeche, C. (2015). IGM constraints from the SDSS-III/BOSS DR9 Lyα forest transmission probability distribution function. Astrophysical Journal, 799(2), 196. https://doi.org/10.1088/0004-637X/799/2/196

© 2015. The American Astronomical Society. All rights reserved. The Lyα forest transmission probability distribution function (PDF) is an established probe of the intergalactic medium (IGM) astrophysics, especially the temperature-density relationshi... Read More about IGM constraints from the SDSS-III/BOSS DR9 Lyα forest transmission probability distribution function.

Evidence of patchy hydrogen reionization from an extreme Lyα trough below redshift six (2015)
Journal Article
Becker, G. D., Bolton, J. S., Madau, P., Pettini, M., Ryan-Weber, E. V., & Venemans, B. P. (2015). Evidence of patchy hydrogen reionization from an extreme Lyα trough below redshift six. Monthly Notices of the Royal Astronomical Society, 447(4), 3402-3419. https://doi.org/10.1093/mnras/stu2646

© 2015 The Authors. We report the discovery of an extremely long (~110 Mpc h -1 ) and dark (τ eff ≳ 7) Lyα trough extending down to z ≃ 5.5 towards the z em ≃ 6.0 quasar ULAS J0148+0600. We use these new data in combination with Lya forest measureme... Read More about Evidence of patchy hydrogen reionization from an extreme Lyα trough below redshift six.

Modification of perpendicular magnetic anisotropy and domain wall velocity in Pt/Co/Pt by voltage-induced strain (2015)
Journal Article
Shepley, P., Rushforth, A., Wang, M., Burnell, G., & Moore, T. (2015). Modification of perpendicular magnetic anisotropy and domain wall velocity in Pt/Co/Pt by voltage-induced strain. Scientific Reports, 5, Article 7921. https://doi.org/10.1038/srep07921

The perpendicular magnetic anisotropy Keff, magnetization reversal, and field-driven domain wall velocity in the creep regime are modified in Pt/Co(0.85–1.0 nm)/Pt thin films by strain applied via piezoelectric transducers. Keff, measured by the extr... Read More about Modification of perpendicular magnetic anisotropy and domain wall velocity in Pt/Co/Pt by voltage-induced strain.

3D ToF-SIMS Imaging of Polymer Multilayer Films Using Argon Cluster Sputter Depth Profiling (2015)
Journal Article
Bailey, J., Havelund, R., Shard, A. G., Gilmore, I. S., Alexander, M. R., Sharp, J. S., & Scurr, D. J. (2015). 3D ToF-SIMS Imaging of Polymer Multilayer Films Using Argon Cluster Sputter Depth Profiling. ACS Applied Materials and Interfaces, 7(4), 2654-2659. https://doi.org/10.1021/am507663v

ToF-SIMS imaging with argon cluster sputter depth profiling has provided detailed insight into the three-dimensional (3D) chemical composition of a series of polymer multilayer structures. Depths of more than 15 μm were profiled in these samples whil... Read More about 3D ToF-SIMS Imaging of Polymer Multilayer Films Using Argon Cluster Sputter Depth Profiling.

The SCUBA-2 cosmology legacy survey: ALMA resolves the rest-frame far-infrared emission of sub-millemeter galaxies (2015)
Journal Article
Simpson, J. M., Smail, I., Swinbank, A. M., Almaini, O., Blain, A. W., Bremer, M. N., …van der Werf, P. P. (2015). The SCUBA-2 cosmology legacy survey: ALMA resolves the rest-frame far-infrared emission of sub-millemeter galaxies. Astrophysical Journal, 799(1), 81. https://doi.org/10.1088/0004-637x/799/1/81

We present high-resolution (0’’.3) Atacama Large Millimeter Array 870 μm imaging of 52 sub-millimeter galaxies (SMGs) in the Ultra Deep Survey field to investigate the size and morphology of the sub-millimeter (sub-mm) emission on 2–10 kpc scales. We... Read More about The SCUBA-2 cosmology legacy survey: ALMA resolves the rest-frame far-infrared emission of sub-millemeter galaxies.

The effect of isocapnic hyperoxia on neurophysiology as measured with MRI and MEG (2015)
Journal Article
Croal, P. L., Hall, E. L., Driver, I. D., Brookes, M. J., Gowland, P. A., & Francis, S. T. (2015). The effect of isocapnic hyperoxia on neurophysiology as measured with MRI and MEG. NeuroImage, 105, https://doi.org/10.1016/j.neuroimage.2014.10.036

The physiological effect of hyperoxia has been poorly characterised, with studies reporting conflicting results on the role of hyperoxia as a vasoconstrictor. It is not clear whether hyperoxia is the primary contributor to vasoconstriction or whether... Read More about The effect of isocapnic hyperoxia on neurophysiology as measured with MRI and MEG.