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    1401 research outputs found

    Data associated with 'Mechanical deformations of a liquid crystal elastomer at director angles between 0˚ and 90˚: Deducing an empirical model encompassing anisotropic nonlinearity'

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    Despite the wealth of studies reporting mechanical properties of Liquid Crystal Elastomers (LCEs), no theory can currently describe their complete mechanical anisotropy and nonlinearity. Our paper presents the first comprehensive study of mechanical anisotropy in an all-acrylate LCE via tensile tests that simultaneously track liquid crystal director rotation. We then use an empirical approach to gain a deeper insight into the LCE’s mechanical responses at values of strain, up to 1.5, for initial director orientations between 0˚ and 90˚. Using a method analogous to time-temperature superposition, we create master curves for the LCE’s mechanical response and use these to deduce a model that accurately predicts the load curve of the LCE for stresses applied at angles between 15° and 70° relative to the initial liquid crystal director. This LCE has been shown to exhibit auxetic behaviour for deformations perpendicular to the director. Interestingly, our empirical model predicts that the LCE will further demonstrate auxetic behaviour when stressed at angles between 54° and 90° to the director. Our approach could be extended to any LCE, so represents a significant step forward toward models which would aid the further development of LCE theory, and the design and modelling of LCE-based technologies. The data set associated with these studies are included here

    Data to support "Cyclotriveratrylene-tethered trinuclear palladium(II)-NHC com-plexes; reversal of site selectivity in Suzuki-Miyaura reactions"

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    Trinuclear complexes with three palladium N-heterocyclic carbene (NHC) centres tethered onto a host-type cyclotriguaiacylene scaffold, and monomeric analogues were studied by NMR, infrared spectroscopy, mass spectrometry and structures determined by X-ray crystallography. Use of the complexes to catalyse Suzuki Miyaura cross-coupling reactions was investigated

    Dataset for Skin-deep Patterning of Calcite

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    Dataset for Skin-deep Patterning of Calcite. From the data in this file, we show that calcite surface patterning changes with experimental conditions, additive concentrations, time, additive mixtures and additive chemistry. As a model additive, we used a cement protein cp20k, to develop a range of surface patterns such as nanoshoots and arrowheads. From a range of other additives, we were then able to show how many other surface patterning motifs were then accessible. The data includes SEM, Optical, confocal fluorescence, FIB/SEM, and TEM data

    A dataset of dockless bike sharing trips and road network for Nanchang, China

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    The dataset includes the data and scripts in the paper “ Yang Y, Heppenstall A, Turner AGD and Comber A. A spatiotemporal and graph-based analysis of dockless bike sharing patterns to understand urban flows over the last mile. Paper accepted for publication in Computers Environment and Urban Systems (July 2019)”. It contains (1) Road Network and dockless bike trips of 10 weekdays in Nanchang, China (2) Scripts used to produce the result in the paper

    Data supporting the publication 'Microgels as viscosity modifiers influence lubrication performance of continuum'

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    Excel sheet providing the data from all figures in the associated paper

    Data associated with 'The Influence of Kinematic Conditions and Variations in Component Positioning on the Severity of Edge Loading andWear of Ceramic-on-Ceramic Hip Bearings'

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    Data associated with the paper "The Influence of Kinematic Conditions and Variations in Component Positioning on the Severity of Edge Loading and Wear of Ceramic-on-Ceramic Hip Bearings". This dataset contains: - Figure 4. Dynamic separation (mean +/- 95% confidence limits, n = 3) of 36 mm diameter BIOLOX®delta ceramic-on-ceramic bearings under two axes and three axes of rotation conditions with 45 degree and 65 degree cup inclination angle conditions and 1, 2, 3 and 4 mm of medial-lateral translational mismatch conditions. - Figure 5. Load at the rim at separation (mean +/- 95% confidence limits, n = 3)of 36 mm diameter BIOLOX®delta ceramic-on-ceramic bearings under two axes and three axes of rotation conditions at 45 degree and 65 degree cup inclination angles with 1, 2, 3 and 4 mm of medial-lateral translational mismatch. - Figure 6. Severity of edge loading (mean ± 95% confidence limits, n = 3) of 36 mm diameter BIOLOX®delta ceramic-on-ceramic bearings under two axes and three axes of rotation conditions with 45 degree and 65 degree cup inclination angles and 1, 2, 3 and 4 mm of medial-lateral translational mismatch conditions (offset deficiency). - Figure 7. Wear rates (mean ± 95% confidence limits, n = 6) of 36 mm diameter BIOLOX®delta ceramicon-ceramic bearings under two axes and three axes of rotation conditions with 45 degree and 65 degree cup inclination angles and 4 mm of medial-lateral translational mismatch conditions

    Semantic Approach to Model Diversity in a Social Cloud: Presentation Skills Ontology (PreSOn)

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    Datasets associated with the PhD thesis "Semantic Approach to Model Diversity in a Social Cloud". Presentation Skills Ontology (PreSOn)

    Data for the publication ‘A new instrument for time-resolved measurement of HO2 radicals’

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    Time resolved OH and HO2 traces for the reactions of the hydroxyl radical with hydrogen peroxide (H2O2), methanol (CH3OH) and n-butanol (nC4H9OH

    Dataset associated with "Spin-valve Josephson junctions with perpendicular magnetic anisotropy for cryogenic memory"

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    We demonstrate a Josephson junction with a weak link containing two ferromagnets, with perpendicular magnetic anisotropy and independent switching fields in which the critical current can be set by the mutual orientation of the two layers. Such pseudospin-valve Josephson junctions are a candidate cryogenic memory in an all superconducting computational scheme. Here, we use Pt/Co/Pt/CoB/Pt as the weak link of the junction with d_Co = 0.6 nm, d_CoB = 0.3 nm, and d_Pt = 5 nm and obtain a 60% change in the critical current for the two magnetization configurations of the pseudospin-valve. Ferromagnets with perpendicular magnetic anisotropy have advantages over magnetization in-plane systems which have been exclusively considered to this point. The magnetization and magnetic switching of layers in the junction does not affect the in-plane magnetic flux and so the maximum critical current is obtained at close to zero applied magnetic field, and the spin-orbit coupling in our system opens routes to additional device functionality such as spin-orbit torque switching of the barrier state

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