39 Works

Elucidation of the helical spin structure of FeAs

Tom Lancaster, R. Schoonmaker, S.H. Lee, C.-H. Du, P. Steadman, J. Strempfer, Kh. A. Ziq, S.J. Clark, P.D. Hatton & T. Frawley
We present the results of resonant x-ray scattering measurements and electronic structure calculations on the monoarsenide FeAs. We elucidate details of the magnetic structure, showing the ratio of ellipticity of the spin helix is larger than previously thought, at 2.58(3), and reveal both a right-handed chirality and an out-of-plane component of the magnetic moments in the spin helix. We find that electronic structure calculations and analysis of the spin-orbit interaction are able to qualitatively account...

Field imaging near to the surface of terahertz reflective optics using a vector network analyzer

Maryam Hajji
Dataset contains S-parameter measurements recorded with Vector Network Analyser Agilent N5224A. Data are stored as a Matlab v5 (*.mat) file. Complex values of the measured S-parameter are stored in a 101x101x11 (X*Y*Z) matrix.

Supporting data: Mechanism for the uniaxial strain dependence of the critical current in practical REBCO tapes

Kozo Osamura, Shutaro Machiya & Damian Hampshire
Abstract form paper: In order to elucidate the effect of uniaxial strain on the critical current of practical REBCO tapes (REBa2Cu3O7−d , RE = Y and Gd) fabricated by Superpower and SuNAM, two types of critical current measurements were carried out. In the first, the tape sample was attached directly to a universal testing machine and pulled under a tensile load. In the second, the tape was soldered to a Cu–Be springboard and then attached...

Durham RCUK [Green] Open Access Data Year 3 (Aug2015-Jul2016)

Sarah Hyland & James Bisset
Data listing all articles and conference papers published by a Durham author acknowledging RCUK funding between August 2015 and July 2016, which met the RCUK Open Access policy requirements via the Green OA route.

iGIMP: An implicit generalised interpolation material point method for large deformations (figure data)

T.J. Charlton, W.M. Coombs & C.E. Augarde
The Material Point Method (MPM) uses a combined Eulerian-Lagrangian approach to solve problems involving large deformations. A problem domain is discretised as material points which are advected on a background grid. Problems are encountered with the original MPM when material points cross between grid cells, and this has been tackled by the development of the Generalised Interpolation MPM, where material points' domains of influence extend beyond the currently occupied grid cell. In this paper, the...

UKGN IPSA simulation - Location Awareness in Multi-Agent Control of Distributed Energy Resources - Hutchinson - 2017.zip

Harriet Hutchinson
This zip contains the set of steady-stage voltages for the UK Generic Network, extended for future growth and including embedded generation, simulated using IPSA+ and scripted using Python 2.

(C6F6)n- and (C6F6)I- Study Complete Dataset

Joshua Rogers & Cate Anstoter
The primary electron attachment process in electron driven chemistry represents one of the most fundamental chemical transformations with wide-ranging importance in science and technology. However, the mechanistic detail of the seemingly simple reaction of an electron and a neutral to form an anion remains poorly understood, particularly at very low electron energies. Here, time-resolved photoelectron imaging was used to probe the electron attachment process to a non-polar molecule using time-resolved methods. An initially populated diffuse...

Data and Software for Degiacomi et al, Structure, 2017

Matteo T. Degiacomi, Justin L. P. Benesch, Carla Schmidt & Andrew J. Baldwin
Data and Software supporting Degiacomi et al study about a new method and associated software, DynamXL, that accommodates intrinsic protein dynamics in the modelling of cross-linking data. This approach substantially reduces error rates, leading to higher confidence in structure assessment and improved protein-protein docking.

Dataset and Software for "On the critical Casimir interaction between anisotropic inclusions on a membrane"

Jorge Benet, Fabien Paillusson & Halim Kusumaatmaja
Abstract from article: Using a lattice model and a versatile thermodynamic integration scheme, we study the critical Casimir interactions between inclusions embedded in a two-dimensional critical binary mixtures. For single-domain inclusions we demonstrate that the interactions are very long range, and their magnitudes strongly depend on the affinity of the inclusions with the species in the binary mixtures, ranging from repulsive when two inclusions have opposing affinities to attractive when they have the same affinities....

Fast native-MATLAB stiffness assembly for SIPG linear elasticity

R. Bird, W.M. Coombs & S. Giani
When written in MATLAB the finite element method (FEM) can be implemented quickly and with significantly fewer lines, when compared to compiled code. MATLAB is also an attractive environment for generating bespoke routines for scientific computation as it contains a library of easily accessible inbuilt functions, effective debugging tools and a simple syntax for generating scripts. However, there is a general view that MATLAB is too inefficient for the analysis of large problems. Here this...

Durham RCUK Open Access Data Year 4 (Apr2016-Mar2017)

James Bisset, Sarah Hyland & Frederick W. F. Foulds
NOTE: In early 2017, RCUK changed their 'compliance reporting' year to match their 'financial reporting' year, so that both reflected the period April 1st to March 31st each year. This means that part of this Year 4 data will overlap with the previous year 3 compliance data.

Probing interactions of thermal Sr Rydberg atoms using simultaneous optical and ion detection - Supporting Data

Ryan K. Hanley, Alistair D. Bounds, Paul Huillery, Niamh C. Keegan, Riccardo Faoro, Elizabeth M. Bridge, Kevin J. Weatherill & Matthew P.A. Jones
We demonstrate a method for probing interaction effects in a thermal beam of strontium atoms using simultaneous measurements of Rydberg EIT and spontaneously created ions or electrons. We present a Doppler-averaged optical Bloch equation model that reproduces the optical signals and allows us to connect the optical coherences and the populations. We use this to determine that the spontaneous ionization process in our system occurs due to collisions between Rydberg and ground state atoms in...

Data for Interspecies thermalization in an ultracold mixture of Cs and Yb in an optical trap

Alex Guttridge, Stephen Hopkins, Stefan Kemp, Matthew Frye, Jeremy Hutson & Simon Cornish
Data files used in "Interspecies thermalization in an ultracold mixture of Cs and Yb in an optical trap". For more information refer to the README.txt file included in data zip file.

Durham RCUK [Green] Open Access Data Year 4 (Apr2016-Mar2017)

Frederick W F Foulds
NOTE: In early 2017, RCUK changed their 'compliance reporting' year to match their 'financial reporting' year, so that both reflected the period April 1st to March 31st each year. This means that part of this Year 4 data will overlap with the previous year 3 compliance data.

Exchange constants in molecule-based magnets derived from density functional methods

Tom Lancaster, Stewart Clark & Iori Thomas
Cu(pyz)(NO3)2 is a quasi-one-dimensional molecular antiferromagnet that exhibits three-dimensional long-range magnetic order below T N = 110 mK due to the presence of weak interchain exchange couplings. Here, we compare calculations of the three largest exchange coupling constants in this system using two techniques based on plane-wave basis-set density functional theory: (i) a dimer fragment approach and (ii) an approach using periodic boundary conditions. The calculated values of the large intrachain coupling constant are found...

Data for the paper: GMP polyamine hybrid hydrogels-enhanced gel strength probed by z-spectroscopy

Juan A. Aguilar Malavia, Raquel Belda Vidal, Jonathan W. Steed, Gareth A. Morris & Enrique Garcia-España
The self-assembling tendencies of guanosine-5’-monophosphate (GMP) can be drastically increased using polyamines, with potential applications in the production of biocompatible smart materials, as well as for the design of anti-tumoral drugs based on G-quadruplex tabilization. Results from scanning electron microscopy (SEM), wide angle X-ray scattering (WAXS), rheology and nuclear magnetic resonance (NMR) z-spectroscopy studies are presented.

SIPG fracture data supporting: A quasi-static discontinuous Galerkin configurational force fracture propagation method for brittle materials [IJNME (2017)]

R.E. Bird, W.M. Coombs & S. Giani
Abstract from paper: This paper presents a framework for r-adaptive quasi-static configurational force (CF) brittle crack propagation, cast within a discontinuous Galerkin (DG) symmetric interior penalty (SIPG) finite element scheme. Cracks are propagated in discrete steps, with a staggered algorithm, along element interfaces which align themselves with the predicted crack propagation direction. The key novelty of the work is the exploitation of the DG face stiffness terms existing along element interfaces to propagate a crack...

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