1401 research outputs found
Sort by
Spin-orbit interaction enhancement in permalloy thin films by Pt-doping
No full textRaw data and images used for figures found in "Spin-orbit interaction enhancement in permalloy thin films by Pt-doping". The data files are grouped by technique
Graphene electrodes for adaptive liquid crystal contact lenses
No full textThe unique feature of graphene is that its superlatives cover a whole range of properties: electrical, chemical, mechanical, thermal and others. Each of such special properties earn graphene a place in current or future applications. However, the full potential of this material is realised when a number of its superlatives are used simultaneously in combination, which would allow one to create novel, unique applications, where no other material could be utilised. Here we demonstrate one such application – adaptive contact lenses based on liquid crystals, where simultaneously the high electrical conductivity, transparency, flexibility and elasticity of graphene are being utilised. In our devices graphene is used as a transparent conductive coating on flexible, curved PMMA substrates, which sandwich liquid crystal material. Voltage, applied to the graphene electrode, leads to switching of the planar aligned liquid crystal, changing the refractive index, thus modifying the optical power of the contact lens. Our adaptive lenses provide a +0.7 D change in optical power with an applied voltage of 7.1 V_rms - perfect to correct presbyopia, the age-related condition that limits the near-focus ability of 100% of the population over the age of fifty
Database of third generation Toyota Prius operation over city centre taxi test routes.
Get PDFA third generation Toyota Prius has been tracked over 480 miles of city centre driving in Leeds, UK. The vehicle was equipped with GPS tracking (Racelogic VBOX Lite) and CAN (HEM mini logger) data loggers recording around 40 internal and external vehicle parameters, including vehicle fuel consumption and energy flows through the electrical system. The vehicle was driven multiple times over four test routes designed to represent common taxi driving. A single driver performed all vehicle testing. To study the effect of driving style the driver was instructed to perform multiple runs using a calm (car in eco-mode setting), normal (car in default setting), or aggressive (car in power-mode setting) driving style. Data from both sets of equipment has been time aligned, fused together and supplemented with road gradient calculated in ArcGIS from a digital surface model to provide an accurate calculation of vehicle tractive power demand. The processed and raw data, along with supporting meta information/ texts are available for researchers working on real driving behaviour, hybrid vehicles, the Toyota Prius and taxi operations. The University of Leeds is open to future collaborations to support the creation of new databases using the instrumented hybrid research car
Data associated with 'Three-dimensional Icosahedral Phase Field Quasicrystal'
Get PDFParaview data and related videos for 3D quasicrysta
Dataset associated with 'Influence of hip joint simulator design and mechanics on the wear and creep of metal-on-polyethylene bearings'
No full textThis dataset contains the input and output load and angular displacement data from the hip joint simulators used in this study. The dataset also contains the volumetric wear rates of the polyethylene liners, the output images of the liner surfaces from the coordinate measurement machine and Redlux software, and the liner penetration depths
Dataset associated with ‘Not all feldspars are equal: a survey of ice nucleating properties across the feldspar group of minerals'
No full textMineral dust particles from wind-blown soils are known to act as effective ice nucleating particles in the atmosphere and are thought to play an important role in the glaciation of mixed phase clouds. Recent work suggests that feldspars are the most efficient nucleators of the minerals commonly present in atmospheric mineral dust. However, the feldspar group of minerals is complex, encompassing a range of chemical compositions and crystal structures. To further investigate the ice-nucleating properties of the feldspar group we measured the ice nucleation activities of 15 well-characterised feldspar samples. We show that alkali feldspars, in particular the potassium feldspars, generally nucleate ice more efficiently than feldspars containing significant amounts of calcium in the plagioclase series. We also find that there is variability in ice nucleating ability within these groups. While five out of six potassium-rich feldspars have a similar ice nucleating ability, one potassium rich feldspar sample and one sodium-rich feldspar sample were significantly more active. The hyper-active Na-feldspar was found to lose activity with time suspended in water with a decrease in mean freezing temperature of about 16 °C over 16 months; the mean freezing temperature of the hyper-active K-feldspar decreased by 2 °C over 16 months, whereas the ‘standard’ K-feldspar did not change activity within the uncertainty of the experiment. These results, in combination with a review of the available literature data, are consistent with the previous findings that potassium feldspars are important components of soil dusts for ice nucleation. However, we also show that there is the possibility that some alkali feldspars can have enhanced ice nucleating abilities, which could have implications for prediction of ice nucleating particle concentrations in the atmosphere
Dataset for "The Effect of Collagen Fibril Orientation on the Biphasic Mechanics of Articular Cartilage".
No full textThis dataset contains the diffusion eigenvectors derived from the DT-MRI images of the cartilage sample investigated in this study, the finite element model developed based on the diffusion eigenvectors, and the outputs of the finite element models presented in the paper
Polymer-Directed Assembly of Single Crystal Zinc Oxide/ Magnetite Nanocom-posites under Atmospheric and Hydrothermal Conditions.
No full textWithin the field of crystal growth it is recognized that secondary species can sometimes be occluded within a growing crystal according to the crystallization conditions and pairing of the additive and host crystal. This article takes inspiration from this phenomenon to create multifunctional inorganic nanocomposites with unique structures – inorganic single crystals containing embedded inorganic nanoparticles. Using magnetite (Fe3O4)/ ZnO as a suitable test system, ZnO crystals are precipitated from aqueous solution at 90 oC and atmospheric pressure in the presence of Fe3O4 nanoparticles functionalized with anionic diblock copolymers. Analysis of product nanocomposite crystals using atomic absorption spectroscopy shows that the Fe3O4 nanoparti-cles are embedded within the ZnO single crystal hosts at levels of approximately 10 wt%, while TEM analysis shows that there is no apparent discontinuity between the nanoparticles and host crystal matrix. Importantly, we then demonstrate that this occlu-sion approach can also be employed under hydrothermal conditions at 160 oC, without a loss in occlusion efficiency. This offers an important advance on our previous occlusion studies, which were all conducted at room temperature, and vastly increases the range of target materials that can be generated using our synthesis approach. Finally, measurement of the magnetic properties of these nanocomposites shows that they retain the attractive features of the wide band-gap semiconductor ZnO, while benefit-ing from added magnetism
Dataset associated with 'Effect of interfacial intermixing on Dzyaloshinskii-Moriya interaction in Pt/Co/Pt'
No full textWe study the effect of sputter-deposition conditions, namely substrate temperature and chamber base pressure, upon the interface quality of epitaxial Pt/Co/Pt thin films with perpendicular magnetic anisotropy. Here we define interface quality to be the inverse of the sum in quadrature of roughness and intermixing. We find that samples with the top Co/Pt layers grown at 250 'C exhibit a local maximum in roughness-intermixing and that the interface quality is better for lower or higher deposition temperatures, up to 400 'C, above which the interface quality degrades. Imaging the expansion of magnetic domains in an in-plane field using wide-field Kerr microscopy, we determine the interfacial Dzyaloshinskii-Moriya interaction (DMI) in films in the deposition temperature range 100 'C to 300 'C. The net DMI is linked to the difference in top and bottom Co interface qualities; the net DMI increases as the difference between top and bottom Co interface quality increases. Furthermore, for sufficiently low base pressures, the net DMI increases linearly with the deposition temperature, indicating that fine-tuning of the DMI may be achieved via the deposition conditions
The Cosmic Vision and Telepathic Following of Bruce Haack
No full textFew recently rediscovered pioneers of electronic music are as colorful and unlikely as Bruce Haack (1931-1988)
Bruce Haack was born in a tiny mining community in rural Alberta, Canada, an unlikely time and place to produce a future electro-mystic whose absolutely individual work has destabilized received histories of electronic music. Despite being rejected by the University of Alberta’s music program on the basis of his poor notational skills, he was invited to study with Vincent Persichetti at the Juilliard School. Not surprisingly, on the evidence of his later musical output, Haack found the curriculum at Juilliard restrictive and did not complete his studies. But two consequences of his failed conservatory education would have lasting significance: his relocation from rural Canada to 1950s Manhattan and befriending fellow Juilliard student, pianist Ted Pandel, who became a lifelong promoter of Haack’s odd genius and protector of his fragile personality.
From the beginning of his compositional output Haack pursued his interest in experimental electronic music technologies and ignored established genre boundaries. His work in the late 1950s involved scoring ‘serious’ music for dance and theater productions and writing commodity music for labels like Dot and Coral. His electronic scores – such as Les Etapes from 1955 – freely mixed electronically synthesized sounds (with circuits of his own design) with musique concrète at a time when this was rarely done.
Another persistent trope of electronic music – the visionary inventor/artist reduced to a carnival barker pandering to the public’s on-again/off-again interest in odd and futuristic electronic instruments played itself out in Haack’s TV appearances on “I’ve Got a Secret” and “TheTonight Show” with Johnny Carson playing his Dermatron, an instrument that requires skin-to-skin contact by two people to complete the electronic circuit and produce sound. A major part of Haack’s spotty employment was as a piano accompanist for dance classes. Through this activity he was to meet children’s creative movement teacher Esther Nelson. With Nelson and Pandel, Haack started Dimension Five Records to release albums of the bizarrely original children’s music he developed for Nelson’s movement pedagogy. An early example of an absolutely DIY enterprise, Haack recorded the music in his bedroom studio and even designed many of the memorably bizarre album covers.
In 1968 Haack began working in his own idiom of psychedelic rock, and by 1970, managed to secure a release on Columbia Records of "The Electric Lucifer, perhaps one of the strangest and most accomplished albums intended for a rock listenership to come from a major label.
Mythologies about Haack have filled the void of more systematic research until now. For the past 4 years I have been interviewing Ted Pandel and working through all that remains of Haack’s tapes, correspondance and working notes. As interest in Haack’s life and output continues to rise I intend to prepare the groundwork for future Haack studies. Haack’s musical interests were so varied yet idiosyncratic that researchers from a number of fields will find interest in his mostly unknown output