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3,576 results for “strain”
Ultrafast dark-field X-ray microscopy to image strain wave propagation
<p>This dataset includes DF-XRM data obtained at an X-FEL source.<br> The sample is a diamond single crystal with a strain wave propagating through the center, which is imaged in a stroboscopic fashion.<br> This data originated the LCLS, see <a href="https://arxiv.org/abs/2211.01042">arXiv:2211.01042</a> for a description of the experiment.<br> Run 538 contains a time series with 1 ns between each step, run 540 contains a time series with 72 ns steps (one full period) while run 536 contains a rocking curve.</p> <p>Each run is divided into hdf5 files with 2000 shots each. Each hdf5 file has then been zipped using the BZIP2 algorithm to reduce the overall size.</p> <p>Each run contains header information with the status of the X-FEL beam and the laser (the laser excites the strain wave). The shots where the X-FEL beam is off should be used to subtract the detector background. Run 536 additionally contains motor positions for the goniometer.</p> <p>Please note: for run 538 and 540 there are ~120 shots at each position. However, the timing tool is unreliable, giving a ±1 ns error, and to analyze this data the correct time of each shot must be first identified. This can be done by looking at the position of the strain wave.<br> <br> Using python, the data may be unziped, opened, and visualized in the following way:</p> <pre><code class="language-python">import zipfile import numpy as np import h5py #unzip with zipfile.ZipFile(f'538_0.zip', 'r') as zip_ref: zip_ref.extractall('') with h5py.File(f'538_0.hdf5', 'r') as f: # print contents of file for key in f.keys(): print(key, f[key].shape, f[key].dtype) # approximate the detector background mask = np.array(f[b'lightStatus_xray']) == 0 Images_DF_Xray_OFF = np.array(f['images_dark_field_arm'][mask,:,:]) df_noise = np.median(Images_DF_Xray_OFF, axis = 0) # extract desired frames ims = np.array(f['images_dark_field_arm'][120*1:120*2]) im = np.average(ims, axis = 0) # plot the detector background and the average of the selected frames import matplotlib.pyplot as plt fig, axes = plt.subplots(1,2, figsize = (4, 12), dpi = 300) axes[0].imshow(df_noise, vmin = np.percentile(df_noise,1), vmax = np.percentile(df_noise,99)) axes[1].imshow(im-df_noise, vmin = np.percentile(im-df_noise,1), vmax = np.percentile(im-df_noise,99))</code></pre> <p> </p>
Dataset for: The role of hydrides and precipitates on the strain localisation behaviour in a zirconium alloy
<p><strong>This is the dataset used in the following publication: </strong></p> <p> </p> <p>R. Thomas, D. Lunt, M.D. Atkinson, J. Quinta da Fonseca, M. Preuss, P. Honniball, P. Frankel, The role of hydrides and precipitates on the strain localisation behaviour in a zirconium alloy, Acta Materialia, 2023, 119327, ISSN 1359-6454, https://doi.org/10.1016/j.actamat.2023.119327.</p> <p><strong>Contained in this dataset are:</strong></p> <p>A Jupyter notebook which uses the open-source DefDAP Python package (https://github.com/MechMicroMan/DefDAP) to open enclosed HRDIC, EBSD and image data for hydrides Zircaloy-4 deformed to ~3% strain, along the rolling direction.</p> <p>Please use the 'master' version of DefDAP: <a href="https://github.com/MechMicroMan/DefDAP/tree/51074e158b0131c69358ddf7eee319e41cf582ca">https://github.com/MechMicroMan/DefDAP/tree/51074e158b0131c69358ddf7eee319e41cf582ca</a></p> <p><strong>Publication abstract:</strong></p> <p>In service, zirconium alloys undergo aqueous corrosion and hydrogen is absorbed, which can lead to the formation of hydrides. Hydrides, as well as the precipitates in zirconium alloys, affect the mechanical performance, though their contribution to plasticity is not yet understood. This study uses a combination of high-resolution digital image correlation and electron backscatter diffraction to quantify the strain partitioning between the different phases. Following uniaxial tensile deformation, it was found that the average strain within the δ-ZrH and Zr(Fe,Cr)2 was lower than in the α-Zr. Shear bands in the α-Zr matrix were observed to interact with small and medium sized hydride in multiple ways, such as terminating at the interface, cracking and shear around the interface or causing plastic slip in the hydride. Large hydrides showed a particularly detrimental effect on deformation behaviour, with large strain localisations and cracking observed at interfaces, which are typically precursors to failure. In contrast, the Zr(Fe,Cr)2precipitates remained undeformed and forced the expected metal-matrix lattice rotation. The importance of these observations in context of fuel cladding integrity is discussed.</p>
Hourly maximum bending strains for 108 trees on Barro Colorado Island, Panama
<p>Hourly maximum bending strain time-series data for 108 trees on Barro Colorado Island. Measured at 1.3 m above ground level. Data available from March - June 2022. These hourly summaries were created from raw strain data using the R scripts provided.</p>
Global Effects of a Probiotic Strain on Lactating Women
ClinicalTrials.gov study NCT01124448. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Left Atrial Strain and Cryptogenic Stroke
ClinicalTrials.gov study NCT07224178. IPD Sharing: YES. Countries: 1. Publications: 10.
Efficacy of B7A BSIgG Against E. Coli Strain B7A Challenge
ClinicalTrials.gov study NCT03040687. IPD Sharing: UNDECIDED. Countries: 1. Publications: 3.
Evaluate Effectiveness of Epiduo® Gel in Reducing Antibiotic Sensitive & Resistant Strains of Propionibacterium (P)Acnes
ClinicalTrials.gov study NCT00907101. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Modulation Of Airway Reactivity With Chronic Mechanical Strain
ClinicalTrials.gov study NCT02396849. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Human Challenge Model Refinement With Enterotoxigenic Escherichia Coli Strain B7A
ClinicalTrials.gov study NCT02773446. IPD Sharing: YES. Countries: 1. Publications: 9.
Evaluation of Myocardial Function by Global Longitudinal Strain (GLS) Measurement in 2D Echocardiography of Patients With Fibromyalgia
ClinicalTrials.gov study NCT07150455. IPD Sharing: NO. Countries: 1. Publications: 17.
Dose-Finding Study of Lyophilized Shigella Sonnei 53G Challenge Strain
ClinicalTrials.gov study NCT02816346. IPD Sharing: NO. Countries: 1. Publications: 1.
Effects of Multi-strain Bacillus Spore Probiotics on Growth, Digestive Function, and Gut Microbiota in Cesarean-Delivered Neonates
ClinicalTrials.gov study NCT07320287. IPD Sharing: YES. Countries: 1. Publications: 7.
Immune-modulatory Effect of Probiotic Strain on Grass Pollen Allergic Individuals
ClinicalTrials.gov study NCT01660698. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Assessment of the Effect of Botulinum Toxin in Extensor Digitorum Brevis Via Strain Gauge and Nerve Conduction Studies
ClinicalTrials.gov study NCT00822523. IPD Sharing: NO. Countries: 1. Publications: 2.
A Study to Explore the Existence of Horizontal Transmission of the RIX4414 Vaccine Strain Between Twins Within a Family.
ClinicalTrials.gov study NCT00396630. IPD Sharing: YES. Countries: 1. Publications: 1.
Strain-elastography in Endometrial Cancer
ClinicalTrials.gov study NCT06623916. IPD Sharing: NO. Countries: 1. Publications: 1.
Carvedilol for the Prevention of Anthracycline/Anti-HER2 Therapy Associated Cardiotoxicity Among Women With HER2-Positive Breast Cancer Using Myocardial Strain Imaging for Early Risk Stratification
ClinicalTrials.gov study NCT02177175. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Data from: Bighorn sheep show similar in-host responses to the same pathogen strain in two contrasting environments
Open the record for dataset details and reuse information.
RNA sequencing data for polyphenic and monophenic Manduca sexta strains
Open the record for dataset details and reuse information.
RNA-seq of green hydra strains' ( Hydra viridissima) response to the removal or exchange of symbionts
Open the record for dataset details and reuse information.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
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DANDI Archive for NWB datasets
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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.