University of Reading

About: University of Reading is a education organization based out in Reading, United Kingdom. It is known for research contribution in the topics: Population & Climate change. The organization has 18728 authors who have published 46707 publications receiving 1758671 citations. The organization is also known as: University College, Reading.

High-Strength, Healable, Supramolecular Polymer Nanocomposites

Abstract: A supramolecular polymer blend, formed via π–π interactions between a π-electron rich pyrenyl end-capped oligomer and a chain-folding oligomer containing pairs of π-electron poor naphthalene-diimide (NDI) units, has been reinforced with cellulose nanocrystals (CNCs) to afford a healable nanocomposite material. Nanocomposites with varying weight percentage of CNCs (from 1.25 to 20.0 wt %) within the healable supramolecular polymeric matrix have been prepared via solvent casting followed by compression molding, and their mechanical properties and healing behavior have been evaluated. It is found that homogeneously dispersed films can be formed with CNCs at less than 10 wt %. Above 10 wt % CNC heterogeneous nanocomposites were obtained. All the nanocomposites formed could be rehealed upon exposure to elevated temperatures although, for the homogeneous films, it was found that the healing rate was reduced with increasing CNC content. The best combination of healing efficiency and mechanical properties was obt...

Price Discovery in American and British Property Markets

Abstract: This paper examines the securitized (public) and unsecuritized (private) commercial property markets in the United States and the United Kingdom for evidence of price discovery. Appraisal-based returns are corrected for smoothing, without presupposing the true returns to be uncorrelated or unpredictable across time. Real Estate Investment Trusts (REITs) and property company returns are corrected for leverage. We find evidence that price discovery occurs in the securitized market structure in both countries, and that this price information does not fully transmit to the unsecuritized markets for a year or more. In Britain, the unsecuritized market appears to be more closely and immediately linked to the securitized market than is the case in the U.S.

The modified mild-slope equation

Abstract: A modified version of the mild-slope equation is derived and its predictions of wave scattering by two-dimensional topography compared with those of other equations and with experimental data. In particular, the modified mild-slope equation is shown to be capable of describing known scattering properties of singly and doubly periodic ripple beds, for which the mild-slope equation fails. The new equation compares favourably with other models of scattering which improve on the mild-slope equation, in that it is widely applicable and computationally cheap.

Orbital evolution and migration of giant planets: modeling extrasolar planets

Abstract: Giant planets in circumstellar disks can migrate inward from their initial (formation) positions. Radial migration is caused by inward torques between the planet and the disk, by outward torques between the planet and the spinning star, and by outward torques due to Roche lobe overflow and consequent mass loss from the planet. We present self-consistent numerical considerations of the problem of migrating giant planets. Summing torques on planets for various physical parameters, we find that Jupiter-mass planets can stably arrive and survive at small heliocentric distances, thus reproducing observed properties of some of the recently discovered extrasolar planets. Inward migration timescales can be approximately equal to or less than disk lifetimes and star spindown timescales. Therefore, the range of fates of massive planets is broad and generally comprises three classes: (I) planets that migrate inward too rapidly and lose all their mass; (II) planets that migrate inward, lose some but not all of their mass, and survive in very small orbits; and (III) planets that do not lose any mass. Some planets in class III do not migrate very far from their formation locations. Our results show that there is a wide range of possible fates for Jupiter-mass planets for both final heliocentric distance and final mass.