1401 research outputs found
Sort by
Partial hybridisation of electron-hole states in an InAs/GaSb double quantum well heterostructure dataset
No full textThese files form the open data deposit for the article "Partial hybridisation of electron-hole states in an InAs/GaSb double quantum well heterostructure" by CS Knox, C Morrison, F Herling, DA Ritchie, O Newell, M Myronov, EH Linfield and CH Marrows, published in Semiconductor Science and Technology
Dataset supporting 'Design Considerations for Liquid Crystal Contact lenses'
No full textSubmitted data for the “Design Considerations for Liquid Crystal Contact lenses”, which has been published in “Journal of Physics D - Applied Physics”. All data has been used for the experimental analysis of samples within the publication
Dataset associated with 'Pinning and hysteresis in the field dependent diameter evolution of skyrmions in Pt/Co/Ir superlattice stacks'
No full textWe have imaged Néel skyrmion bubbles in perpendicularly magnetised polycrystalline multilayers patterned into 1 μm diameter dots, using scanning transmission x-ray microscopy. The skyrmion bubbles can be nucleated by the application of an external magnetic field and are stable at zero field with a diameter of 260 nm. Applying an out of plane field that opposes the magnetisation of the skyrmion bubble core moment applies pressure to the bubble and gradually compresses it to a diameter of approximately 100 nm. On removing the field the skyrmion bubble returns to its original diameter via a hysteretic pathway where most of the expansion occurs in a single abrupt step. This contradicts analytical models of homogeneous materials in which the skyrmion compression and expansion are reversible. Micromagnetic simulations incorporating disorder can explain this behaviour using an effective thickness modulation between 10 nm grai
Dataset associated with 'Crystallographic Structure, Intermolecular Packing Energetics, Crystal Morphology and Surface Chemistry of Salmeterol Xinafoate (Form I)'
No full textSingle crystals of salmeterol xinafoate (form I), prepared from slow cooled supersaturated propan-2-ol solutions, crystallize in a triclinic P1¯ symmetry with 2 closely related independent salt pairs within the asymmetric unit, with an approximately double-unit cell volume compared with the previously published crystal structure. Synthonic analysis of the bulk intermolecular packing confirms the similarity in packing energetics between the 2 salt pairs. The strongest synthons, as expected, are dominated by coulombic interactions. Morphologic prediction reveals a plate-like morphology, dominated by the {001}, {010}, and {100} surfaces, consistent with experimentally grown crystals. Although surface chemistry of the slow-growing {001} face comprises large sterically hindering phenyl groups, although weaker coulombic interactions still prevail from the alcohol group present on the phenyl and hydroxymethyl groups. The surface chemistry of the faster growing {010} and {100} faces are dominated by the significantly stronger cation/anion interactions occurring between the carboxylate and protonated secondary ammonium ion groups. The importance of understanding the cohesive and adhesive nature of the crystal surfaces of an active pharmaceutical ingredient, with respect to their interaction with other active pharmaceutical ingredient crystals and how that may affect formulation design, is highlighted
Dataset supporting the publication 'A comparison between electromechanical and pneumatic controlled knee simulators for the investigation of wear of total knee replacements'
Get PDFMore robust pre-clinical experimental wear simulation methods are required in order to simulate a wider range of activities, observed in different patient populations such as younger more active patients, as well as fully meeting and being capable of going well beyond the existing requirements of the relevant international standards. A new six station electromechanically driven simulator (Simulation Solutions, UK) with five fully independently controlled axes of articulation for each station, capable of replicating deep knee bending as well as other adverse conditions, which can be operated in either force or displacement control with improved input kinematic following, has been developed to meet these requirements. This study investigated the wear of a fixed bearing total knee replacement using this electromechanically driven fully independent knee simulator, and compared it to previous data from a predominantly pneumatically controlled simulator in which each station was not fully independently controlled. In addition, the kinematic performance and the repeatability of the simulators have been investigated and compared to the international standard requirements. The wear rates from the electromechanical and pneumatic knee simulators were not significantly different, with wear rates of 2.6 ± 0.9 and 2.7 ± 0.9 [mm3/MC] (mean ± 95% CI, p=0.99) and 5.4 ± 1.4 and 6.7 ± 1.5 [mm3/MC] (mean ± 95% CI, p=0.54) from the electromechanical and pneumatic simulators, under intermediate levels (maximum 5 mm) and high levels (maximum 10 mm) of AP displacements respectively. However, the output kinematic profiles of the control system, which drives the motion of the simulator followed the input kinematic profiles more closely on the electromechanical simulator than the pneumatic simulator. In addition, the electromechanical simulator was capable of following kinematic and loading input cycles within the tolerances of the international standard requirements (ISO 14243-3, 2014). The new generation electromechanical knee simulator with fully independent control has the potential to be used for a much wider range of kinematic conditions, including high-flexion and other severe conditions, due to its improved capability and performance in comparison to the previously used pneumatic controlled simulators
Dataset associated with "Vogel-Fulcher-Tammann Freezing of a Thermally Fluctuating Artificial Spin Ice Probed by X-ray Photon Correlation Spectroscopy"
No full textWe report on the crossover from the thermal to athermal regime of an arti cial spin ice formed from
a square array of magnetic islands whose lateral size, 30 nm 70 nm, is small enough that they are
superparamagnetic at room temperature. We used resonant magnetic soft x-ray photon correlation
spectroscopy (XPCS) as a method to observe the time-time correlations of the
uctuating magnetic
con gurations of spin ice during cooling, which are found to slow abruptly as a freezing temperature
T0 = 178 5 K is approached. This slowing is well-described by a Vogel-Fulcher-Tammann law,
implying that the frozen state is glassy, with the freezing temperature being commensurate with
the strength of magnetostatic interaction energies in the array. The activation temperature, TA =
40 10 K, is much less than that expected from a Stoner-Wohlfarth coherent rotation model. Zero- eld-cooled/ eld-cooled magnetometry reveals a freeing up of
uctuations of states within islands
above this temperature, caused by variation in the local anisotropy axes at the oxidised edges. This Vogel-Fulcher-Tammann behavior implies that the system enters a glassy state on freezing, which is unexpected for a system with a well-defined ground state
Time-resolved fluorescence microscopic data (traces) of individual lipid vesicles with proton transport activity.
No full textThis data is shared by the authors of the published papers shown below. It also contains additional data gathered after the publication of the paper in the Journal of Chemical Society. The dataset contains time-resolved fluorescence microscopic data (traces) of individual lipid vesicles. It is derived from image data in a method detailed in the two publications. The original image data is too large to share conveniently. The shared dataset is intended to be used with the MATLAB code that is also shared by the authors (DOI:10.5518/150). The data structure of the shared data is described in the file 'open_data_script.m'
Dataset supporting Publication “Evaluation of a New Methodology to Simulate Damage and Wear of Polyethylene Hip Replacements Subjected to Edge Loading in Hip Simulator Testing”.
No full textGravimetric wear data for aged PE and XLPE acetabular liners that were tested on a hip simulator under standard and edge loading conditions as part of a protocol development study
Porcine vertebral material model calibration and validation data set.
No full textExperimental data: Raw data from material testing machine, CT data. Computational data: abaqus input files, experimental vs computational stiffness results, file containing model description and morphology results (DA,BV/TV, angle deviation)
Dataset associated with 'Influence of Kinematics on the Wear of a Total Ankle Replacement'
No full textDataset consisting of wear rates and the gait input profile alongside end of test component photo