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193 results for “dislocation”
Supplementary material for "Song et al., Modelling Simul. Mater. Sci. Eng., 2021: Data-mining of dislocation microstructures: concepts for coarse-graining of internal energies"
<p>This zip archive contains supplementary material in the form of datasets and jupyter notebooks that are used in the following publication:</p> <ul> <li>authors: Hengxu Song, Nina Gunkelmann, Giacomo Po, and Stefan Sandfeld</li> <li>journal: Modelling Simul. Mater. Sci. Eng.</li> <li>year: 2021</li> <li>title: Data-mining of dislocation microstructures: concepts for coarse-graining of internal energies</li> </ul>
Tailoring noncollinear magnetism by misfit dislocation lines
<p>Data for the publication:</p> <p>"The large epitaxial stress induced by the misfit between a triple atomic layer Fe film and an Ir(111) substrate<br> is relieved by the formation of a dense dislocation line network. Spin-polarized scanning tunneling microscopy<br> investigations show that the strain is locally varying within the Fe film and that this variation affects the magnetic<br> state of the system. Two types of dislocation line regions can be distinguished and both exhibit spin spirals<br> with strain-dependent periods (ranging from 3 to 10 nm). Using a simple micromagnetic model, we attribute the<br> changes of the period of the spin spirals to variations of the effective exchange coupling in the magnetic film.<br> This assumption is supported by the observed dependence of the saturation magnetic field on the period of the<br> zero-field spin spiral. Moreover, magnetic skyrmions appear in an external magnetic field only in one type of<br> dislocation line area, which we impute to the different pinning properties of the dislocation lines."</p>
Dataset for article - Dislocation dynamics in Ni: Parameterising dislocation trajectories from atomistic simulations
<p>Data supporting findings in "Dislocation dynamics in Ni: Parameterising dislocation trajectories from atomistic simulations". In this work, 8 identical Molecular Dynamics (MD) simulations of edge dislocations in pure Nickel were run and analysed, where dislocation positions were extracted and each dislocation is tracked for further analysis. Each simulation only differs in the random seed used for setting the initial atom velocities. Files needed to reproduce a specific simulation can be found in the directories provided in <em>data.zip</em>:</p> <ul> <li>fr_18430</li> <li>fr_27743</li> <li>fr_44345</li> <li>fr_46165</li> <li>fr_54382</li> <li>fr_54992</li> <li>fr_97181</li> <li>fr_98232</li> </ul> <p>The random seed needed to set the initial velocities of the atoms are set in the LAMMPS script. The log files generated by LAMMPS are provided for the different stages of a given simulation in the <em>LAMMPS_logs</em> sub-directories. The corresponding output files from the OVITO DXA are also included in the sub-directory <em>Ni_disloc_const</em>. The files <em>disloc_data_*.ca</em> contain the raw output from the OVITO DXA and can be opened directly in OVITO. The <em>disloc_data_*.txt </em>files contain information extracted from the OVITO DXA in a format that can be read in and processed by the dislocation tracking code (<a href="https://github.com/geraldineanis/DislocCode/tree/v1.0.0">https://github.com/geraldineanis/DislocCode/tree/v1.0.0</a>). The wildcard character "*" is replaced with the simulation timestep. In each directory, the dislocation position vs. time data is included as a text file<em> </em>named<em> </em><em>perfect_pos_<seed>.txt</em>. The Mishin 2004 EAM interatomic potential file <em>NiAl_Mishin_2004.eam.alloy</em> used to generate the data is also provided.</p> <p>Additional simulations were carried out at a range of applied shear stresses (20 MPa - 50 MPa). Files needed to reproduce theses simulations are provided in <em>data_stress.zip </em>and follow the same format described above.</p> <p>The data provided here was generated with the <code>LAMMPS/29Sep2021-kokkos</code><em> </em>module on the SULIS Tier 2 HPC platform, which has been built with the OpenMP backend of the <code>kokkos</code> package and uses the <code>foss-2021b</code> toolchain (<a href="https://docs.easybuild.io/common-toolchains/">https://docs.easybuild.io/common-toolchains/</a>). For further information, please refer to <a href="https://sulis-hpc.github.io/appnotes/lammps.html">https://sulis-hpc.github.io/appnotes/lammps.html</a>.</p> <p>For more details on the calculations, please refer to the publication (in preparation). Please refer to the GitHub repository at <a href="https://github.com/geraldineanis/DislocCode/tree/v1.0.0">https://github.com/geraldineanis/DislocCode/tree/v1.0.0</a> for the analysis tools developed and for detailed instructuctions for their use.</p>
Research data supporting "4D Electron Tomography of Dislocations Undergoing Electron Irradiation"
<p>All TEM micrographs and electron diffraction patterns for tomography</p>
Research data supporting for Application of electron tomography of dislocations in beam-sensitive quartz to the determination of strain components
<p>This archives contains all the raw data (micrographs) supporting the publication</p>
Experimental data related to publication: "Dislocation Avalanches: Earthquakes on the MicronScale"
<p>Each .tar file corresponds to a single micropillar compression experiment. The nomenclature of the uploaded dia_<strong>{dia}</strong>_v_<strong>{v}</strong>_p_<strong>{p}</strong>.tar files is the following:</p> <ul> <li>{dia}: The diameter of the micropillar in µm</li> <li>{v}: The compression platen velocity in µm / s</li> <li>{p}: Unique identifier of the micropillar for a given diameter and compression platen velocity</li> </ul> <p>The tar files have the following content:</p> <ul> <li>A tar.gz file which contains the raw Acoustic Emission (AE) data in a compressed file format. Uncompressing it results in one or multiple wav files. In case of multiple ones the covered time range is included at the end of the file name like: 300to800 means the time interval from the compression experiment between 300 s and 800 s. The units of the AE measurement data is 0.1 mV and the sampling rate is 25 MHz.</li> <li>The raw data from the nanoindenter (time, force, displacement, etc.) is located in the file with .dat extension.</li> </ul>
Instance Segmentation of Dislocations in TEM Images
<p>This is the dataset and software for the IEEE publication <em>Instance Segmentation of Dislocations in TEM Images </em>to be published in 2023.</p>
From Electron Tomography of Dislocations to Field Dislocation Mechanics: application to olivine
<p>Aligned and numerically filtered tilt-series of the PoEM9 specimen (double-tilt sample-holder + weak-beam dark-field conditions + precession angle = 0.1°+ objective aperture = 20 micron):</p> <p>Tilted-series 1: Projection angles from -48° to 52° every 2° (from image 01.tif to 51.tif)</p> <p>Tilted-series 5: Projection angles from -56° to 50° every 2° (from image 01.tif to 54.tif)</p>
Physical link between effective viscosity and electrical resistivity for dislocation creep in upper mantle and its application in Northwest Xinjiang, China
<p>Cross-section of electrical resistivity extracted from the preferred 3-D resistivity model from Liu (2022)</p> <p>Format: X (Km), Z (Km), rho (ohm-m), T (K)</p> <p>Notes: Temperature(T) extracted from Sun et al., 2022, available at https://doi.org/10.5281/zenodo.6459746</p> <p> (lat, lon) of the ends of the profile: (,40.71,79.8300), -->, (,46.84,86.0700)</p>
Data from: Revisiting Volterra defects: Geometrical relation between edge dislocations and wedge disclinations
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Data from: Biot-Savart law in the geometrical theory of dislocations
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Data from: Geometrical frustration in nonlinear mechanics of screw dislocation
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Dislocation Mobilities in BCC and B2 Metals as Determined from Atomistic Simulations
<p>Data regarding the velocity of dislocations subjected to different stresses at temperatures determined by molecular dynamics simulations in a tar file.</p> <p>The simulation setup and main results are presented in<br> Setup_and_resulting_plots.pdf</p> <p>The folder RESULTS contains the results for edge dislocations in the folder EDGE-DISLOCATION and the results of screw dislocations in the folder SCREW-DISLOCATION</p> <p>Two types of resulting data are provided in RESULTS:<br> - Steady state velocities (6th column, unit Angstrom/ps) as function of shear stress (2nd column, unit MPa) and temperature (1st column, unit Kelvin),<br> these are named: v_tau_T*.dat<br> - Dislocation position (2nd column, unit Angstrom) as function of time (1st column, unit ps) for different dislocations, stress and temperature,<br> these are named: x_t_T*K_tau*MPa_*.dat</p> <p># Studied Materials/crystal structures<br> Fe/bcc<br> W/bcc<br> NiAl/B2</p> <p># Studied potentials:<br> Fe_Chiesa : https://www.ctcms.nist.gov/potentials/entry/2011--Chiesa-S-Derlet-P-M-Dudarev-S-L-Swygenhoven-H-V--Fe-33/<br> Fe_Mendelev_II: https://www.ctcms.nist.gov/potentials/entry/2003--Mendelev-M-I-Han-S-Srolovitz-D-J-et-al--Fe-2/<br> W_Wang : https://www.ctcms.nist.gov/potentials/entry/2013--Wang-J-Zhou-Y-L-Li-M-Hou-Q--W/<br> NiAl_Pun : https://www.ctcms.nist.gov/potentials/entry/2009--Purja-Pun-G-P-Mishin-Y--Ni-Al/</p> <p># Studied dislocations / Potential / Temparature<br> perfect edge dislocation / Fe_Chiesa / 30K<br> perfect edge dislocation / Fe_Chiesa / 300K<br> perfect edge dislocation / Fe_Mendelev_II / 30K<br> perfect edge dislocation / Fe_Mendelev_II / 300K<br> perfect edge dislocation / W_Wang / 30K<br> perfect edge dislocation / W_Wang / 300K<br> perfect edge dislocation / NiAl_Pun / 30K<br> perfect edge dislocation / NiAl_Pun / 300K<br> perfect screw dislocation / NiAl_Pun / 30K</p> <p>The files necessary to reproduce the results in the folder SIMULATION-FILES and described there.</p>
Micromechanics of Void Nucleation and Early Growth at Incoherent Precipitates: Lattice-trapped and Dislocation-mediated Delamination Modes
<p>This repository contains raw data analyzed in the referenced manuscript published in Crystals (<a href="https://doi.org/10.3390/cryst11010045">10.3390/cryst11010045</a>). See the included README file for detailed information on the contents.</p>
Polymorphic structure of a-type screw dislocation cores in alpha-Ti
<p class="p1">The dislocation core structure has a significant role in determining the dominant slip plane and the magnitude of the Peierls stress for a dislocation. An important challenge when studying dislocation cores is to determine the stable and metastable core morphologies, and then relate these structures to the dynamics of the dislocations. This study introduces a method for identifying core structures that are metastable at zero temperature. Application of this method to ⟨a⟩-type screw dislocations in α-Ti (as described using an empirical potential) reveals a multitude of (meta-)stable non-planar cores. </p> <p>This dataset contains the LAMMPS files for all the (meta-)stable morphologies of screw dislocation cores in α-Ti as described by Hennig's MEAM potential identified in this study. We identified stable core configurations for an ⟨a⟩-type screw dislocation under a compressive non-Schmid stress of 0, 250, 500, 750, and 1000 MPa applied in the [1-100] direction.</p>
Data from "Crossed-state bowing and the strength of binary dislocation junctions"
<p>Contains data and analysis files used in the journal publication:</p> <p>Duan I. and Sills R. B., Crossed-state bowing and the strength of binary dislocation junctions, J. Mech. Phys. Sol., Vol. 190, 105696, 2024.</p> <p><a title="Persistent link using digital object identifier" href="https://doi.org/10.1016/j.jmps.2024.105696" target="_blank" rel="noreferrer noopener"><span>https://doi.org/10.1016/j.jmps.2024.105696</span></a></p>
Critical Resolved Shear Stresses for Dislocation Motion in FeCrNi with and without voids.
<p>Simulation results, Atomistic Simulations of Dislocation-Void Interactions in Concentrated Solid Solution Alloys, Published in MDPI Metals</p>
INDividualised EXercise for Kneecap Dislocations
ClinicalTrials.gov study NCT03798483. IPD Sharing: YES. Countries: 1. Publications: 1.
Late Dislocation of Intraocular Lens (IOL) Following Cataract Surgery: an Evaluation of Two Different Surgical Methods
ClinicalTrials.gov study NCT01784926. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Multicenter Trial of Proximal Femoral Guided Growth in Children With CP and Hips at Risk of Dislocation (GGSH-MC)
ClinicalTrials.gov study NCT06956729. IPD Sharing: YES. Countries: 1. Publications: 27.
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.