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128 results for “Vortex”
3D Taylor-Green vortex Direct Numerical Simulation statistics from Re=1250 to Re=20000
<p>Statistical data for the 3D Taylor Green flow from Re=1250 to Re=20000 obtained with the flow solver <a href="https://www.incompact3d.com/">Incompact3d</a>. </p> <p># ===========================================================================================<br> # When publishing results using this data, the following paper should be cited as the source: <br> # Thibault Dairay, Eric Lamballais, Sylvain Laizet and John Christos Vassilicos<br> # Numerical dissipation vs. subgrid-scale modelling for large eddy simulation<br> # Journal of Computational Physics 337 (2017) 252–274<br> # https://doi.org/10.1016/j.jcp.2017.02.035<br> # ===========================================================================================</p> <p># Column 1 : time t<br> # Column 2 : kinetic energy E_k [=(u^2+v^2+w^2)/2]<br> # Column 3 : dissipation epsilon_t [=-dE_k/dt]<br> # Column 4 : dissipation epsilon [= nu ((du/dx)^2+(du/dy)^2+(du/dz)^2+(dv/dx)^2+(dv/dy)^2+(dv/dz)^2+(dw/dx)^2+(dw/dy)^2+ dw/dz)^2)]<br> # Column 5 : enstrophy Dzeta [=2 nu epsilon]<br> # Column 6 : mean square u^2<br> # Column 7 : mean square v^2<br> # Column 8 : mean square w^2<br> # Column 9 : mean square (du/dx)^2<br> # Column 10 : mean square (du/dy)^2<br> # Column 11 : mean square (du/dz)^2<br> # Column 12 : mean square (dv/dx)^2<br> # Column 13 : mean square (dv/dy)^2<br> # Column 14 : mean square (dv/dz)^2<br> # Column 15 : mean square (dw/dx)^2<br> # Column 16 : mean square (dw/dy)^2<br> # Column 17 : mean square (dw/dz)^2</p>
Optical vortex knots - Mathematica files
<p>The zip-folder contains Wolfram Mathematica files that illustrate the constructions of optical vortex knots as discussed in the article "Complex optical vortex knots". For every knot type of up to 8 crossings there are two Mathematica files, one for each method of construction discussed in the article.</p>
Vortex input file -- Humboldt penguin PVA
<p>Vortex project input file for PVA of Humboldt penguins, completed by workshop participants in Lima, Peru, 2019. Report of the full PHVA and PVA workshop is provided in:</p> <p>McGill, P., A. Baker, R. Lacy, R. Paredes, J. Reyes, J. Rodriguez, A. Tieber, & R. Wallace, (eds.) 2021. Humboldt penguin (Spheniscus humboldti) Population and Habitat Viability Assessment Workshop Final Report. IUCN SSC Conservation Planning Specialist Group, Apple Valley, MN, USA. A PDF of this workshop report can be downloaded at: www.cpsg.org.<br> </p>
Vortex input files -- Lacy et al. Assessing the viability of the Sarasota Bay community of bottlenose dolphins
<p>Vortex PVA input files for analyses presented in Lacy et al. "Assessing the viability of the Sarasota Bay community of bottlenose dolphins", Frontiers in Marine Science. </p>
Vortex Circular Dichroism experiment at IIT
<p>This data set includes the raw data of the Vortex Circular Dichroism experiment carried out at the Istituto Italiano di Tecnologia. The Snapshots.zip file contains the intensity transmission measurements done with a CMOS camera. In order to compare the intensity of the different images, a conversion table is given in data.ods. Data.ods also contains data concerning the measurement of the diameter of the nanoholes used in the experiment. The SEM images used to obtain the diameter of the nanoholes are given in the SEM_nanoholes.zp file.</p>
Time-Resolved Plasmon-Assisted Generation of Arbitrary Optical-Vortex Pulses - Supporting Information for Trajectories
<p>We provide videos of trajectories for a test charge, bound by Lennard-Jones potential. First video, titled "PW Trajectory - Point 2 " refers to the particle under the effect of a plane wave pulse. The other video , titled "Emitter Trajectory - Point 2" refers to the particle affected by an orbital angular momentum carrying pulse.</p> <p>These videos are supplementary materials for the article titled "Time-Resolved Plasmon-Assisted Generation of Arbitrary Optical-Vortex Pulses".</p>
Figures: Vortex model of the aerodynamic wake of airborne wind energy systems
<p>Figures in .pdf, .png and .fig format.</p><p>Figures in .fig format can be opened with MATLAB or other open source programming languages (e.g., Python thought the command scipy.io.loadmat or Octave)</p><p>Figures were updated after: Trevisi, F., Croce, A., and Riboldi, C. E. D.: Corrigendum to "Vortex model of the aerodynamic wake of airborne wind energy systems", published in Wind Energ. Sci., 8, 999–1016, 2023, https://doi.org/10.5194/wes-8-999-2023-corrigendum"</p>
Fish can use coordinated fin motions to recapture their own vortex wake energy
<p>This data repository includes all the fish swimming data and metadata used to investigate how fish can recapture their own wake to improve swimming efficiency. Custom Matlab scripts developed to compute kinematics, pressure fields, and forces are available here.</p> <p><strong>Matlab scripts:</strong> The custom Matlab scripts developed to compute and analyze kinematics, velocimetry, pressure, and force data are in separate folders, including the master script and secondary functions. Pressure calculations from PIV data use the queen2 Matlab package available at ( <a href="http://dabirilab.com/software">http://dabirilab.com/software</a>).</p> <p><strong>Respirometry data (supplementary data): </strong>We provide the oxygen consumption data used in statistical analysis of the COT of each specimen in separate sheets in a single xlsx file. In addition to raw oxygen consumption data, each sheet includes metadata relative to experimental conditions and the magnitude of the relative flow speeds in body length per second tested during steady swimming trials. We also provide the rpm to flow velocity calibration used with our flume. Scaled original pictures of the fish used for respirometry experiments are available in .jpg format and include morphological information such as standard body length (BL) and fork length.</p> <p><strong>PIV data:</strong> High-resolution videos and velocity fields computed using DaVis are sorted by fish specimen and swimming speed. Additional metadata relative to the fish and experimental parameters (i.e., salinity, temperature) are included. Scaled original pictures of the fish used to conduct top-down PIV experiments are available in .jpg format and include morphological information such as standard body length (BL) and fork length.</p>
Magnetic Bloch point and vortex configurations
<p>This dataset is associated to the arxiv publication "Energetics and Dynamics of a stable Bloch point" by Winkler et al., arxiv:2303.10091 (2023). Link: https://arxiv.org/abs/2303.10091</p> <p>The set contains stable Bloch point and vortex configurations in various discretizations, disk shapes and models (Heisenberg or micromagnetic), as well as snapshots of dynamics after shifting the structures out of equilibrium. One jupyter notebook is added to plot the data directly within this repository.</p> <p>The github repsitory to produce this states and to verify the results of the study can be found here: https://github.com/WinklerTB/BP_paper_2023</p> <p>The simulation code (MicMag2) can be found here: https://github.com/WinklerTB/MicMag2</p> <p>Also the ubermag framework was partly used to evaluate the data: https://ubermag.github.io/</p>
Revealing the microscopic mechanism of elementary vortex pinning in superconductors
Open the record for dataset details and reuse information.
Data from: How density dependence, genetic erosion, and the extinction vortex impact evolutionary rescue
Open the record for dataset details and reuse information.
The effect of interactive ozone chemistry on weak and strong stratospheric polar vortex events
<p></p><p>Modeling and observational studies have reported effects of stratospheric ozone extremes on Northern Hemisphere spring climate. Recent work has further suggested that the coupling of ozone chemistry and dynamics amplifies the surface response to midwinter sudden stratospheric warmings (SSWs). Here we study the importance of interactive ozone chemistry in representing the stratospheric polar vortex and Northern Hemisphere winter surface climate variability. We contrast two simulations from the interactive and specified chemistry (and thus ozone) versions of the Whole Atmosphere Community Climate Model, which is designed to isolate the impact of interactive ozone on polar vortex variability. In particular, we analyze the response with and without interactive chemistry to midwinter SSWs, March SSWs, and strong polar vortex events (SPVs). With interactive chemistry, the stratospheric polar vortex is stronger and more SPVs occur, but we find little effect on the frequency of midwinter SSWs. At the surface, interactive chemistry results in a pattern resembling a more negative North Atlantic Oscillation following midwinter SSWs but with little impact on the surface signatures of late winter SSWs and SPVs. These results suggest that including interactive ozone chemistry is important for representing North Atlantic and European winter climate variability. </p><p></p>
Dataset and software for "Experimental observation of vortex rings in a bulk magnet"
<p>The dataset and codes for the manuscript:</p> <p>"Experimental observation of vortex rings in a bulk magnet"</p> <p>Nature Physics (2020)</p> <p>Contains:</p> <p>- Reconstruction of the magnetisation for the three magnetic configurations presented in the paper, in both .mat and .vtk format, for analysis and visualisation with matlab and paraview.</p> <p>- Analysis codes for the calculation of the magnetic vorticity from the magnetisation</p> <p>- Paraview state files for the visualisation and analysis of the configurations.</p>
Interaction between unidirectional quantized vortex rings
<p>All data included in a paper on "Interactions between unidirectional quantized vortex rings". This paper is currently being prepared for submission.</p>
Aerodynamics code used in Wind Energy Science paper "Comparison of a coupled near- and far-wake model with a free-wake vortex code"
<p>This research code has been developed from the start of my PhD as a first step before the HAWC2 implementation of the near wake model.</p> <p>It can be used to make aerodynamic computations of a stiff wind turbine rotor, and it includes</p> <ul> <li>A BEM and far wake model implementation based on the one in HAWC2</li> <li>An attached flow unsteady airfoil aerodynamics model including the modifications described in the WES article</li> <li>Most importantly a near wake model implementation including all major modifications except the recent stand still extension presented at TORQUE 2016</li> </ul> <p>All the data files need to be in a subfolder 'NREL_5MW' located in the same folder as the compiled source code.</p> <p>With the present (hardcoded) settings, the program will simulate the NREL 5 MW reference turbine for 650 seconds, with blade vibrations according to different prescribed mode shapes after steady state is reached. The aerodynamics model is a coupled near and far wake model. The integrated aerodynamic work during 1 period of the different prescribed vibrations will be output in the file 'aerowork.out' .</p> <p>The NREL 5 MW turbine is described in:</p> <p>Jonkman, J., Butterfield, S., Musial,W., and Scott, G.: Definition of a 5-MW Reference Wind Turbine for Offshore System Development, National Renewable Energy Laboratory, 2009.</p>
Allele dataset of western grasswren for use in VORTEX (PVA analysis)
<p>Conservation translocations have become an increasingly popular method to restore or secure vulnerable populations. However, translocations greatly vary in success. The use of population viability analysis (PVA) may increase the likelihood of meeting translocation goals. However, the quality of PVAs to inform translocations is dependent on the availability of ecological data and clear translocation objectives to guide them. Here, we used PVAs to inform the planned conservation translocation of the Western Grasswren (<em>Amytornis textilis textilis</em>) from mainland Shark Bay onto Dirk Hartog Island, Western Australia. A range of translocation scenarios was modelled and scored against success criteria as determined by translocation objectives. Simulations of 20-year outcomes found that a minimum founder population of 112 individuals meets all success criteria. PVA supported sourcing individuals from two subpopulations to maximise genetic diversity. No impact to source populations was detected for the proposed harvest quantities despite conservative estimates of initial source population sizes. Here we demonstrate that creating clear, measurable objectives alongside a PVA lessens ambiguity about which translocation scenarios could be viable. In doing so, we have identified the minimum translocation sizes needed to maintain genetic diversity and population growth, thus increasing the likelihood of translocation success without impacting the source population.</p>
Data for "Impact of Arctic stratospheric polar vortex on the Mediterranean precipitation" by Zhang et al., submitted to JC, 2023.
<p>A detailed description of variables and model setup can be found in "Description of variables and model setup.txt"</p>
Dependence of tropical cyclone weakening rate in response to an imposed moderate environmental vertical wind shear on the warm-core strength and height of the initial vortex
<p>This study investigated the dependence of the early tropical cyclone (TC) weakening rate in response to an imposed moderate environmental vertical wind shear (VWS) on the warm-core strength and height of the TC vortex using idealized numerical simulations. Results show that the weakening of the warm core by upper-level ventilation is the primary factor leading to the early TC weakening in response to an imposed environmental VWS. The upper-level ventilation is dominated by eddy radial advection of the warm-core air. The TC weakening rate is roughly proportional to the warm-core strength and height of the initial TC vortex. The boundary-layer ventilation shows no relationship with the early weakening rate of the TC in response to an imposed moderate VWS. The findings suggest that some previous diverse results regarding the TC weakening in environmental VWS could be partly due to the different warm-core strengths and heights of the initial TC vortex.</p>
The magnetic recording stability of vortex state irregularly shaped natural iron oxides: raw data, processing and micromagnetic modelling results
<p>Magnetic minerals, especially those existing within the vortex domain state, serve as the primary natural archives of ancient magnetic fields. In this investigation, we introduce an innovative method to examine the magnetic stability of remanence-bearing minerals. This method involves integrating <strong>Synchrotron-based Ptychographic X-ray Computed Nano-tomography (PXCT)</strong> <strong>with micromagnetic modelling</strong>. PXCT, a tomographic technique, is a non-destructive resource, which enables its application to valuable (unique) samples. When applied to a microscopic sample of weakly magnetic carbonate rock, PXCT revealed numerous nanoscopic grains of magnetite/maghemite, each exhibiting diverse morphologies, alongside various non-magnetic minerals present in the rock matrix. Subsequently, micromagnetic models were employed to predict the properties of these grains and investigate the potential impacts of irregular morphologies.</p>
Vortex loop dynamics and dynamical quantum phase transitions in 3D fermion matter
<p>Supplemental Material and data corresponding to the article 'Vortex loop dynamics and dynamical quantum phase transitions in 3D fermion matter'.</p> <p>File description:</p> <ul> <li>_sm.pdf - Supplemental Material to the article</li> <li>fig_2_rate.txt - rate function corresponding to Fig. 2</li> <li>fig_3_rate.txt - rate function $\lambda$ corresponding to Fig. 3</li> <li>fig_3_rate_G.txt - rate function $\lambda_G$ corresponding to Fig. 3</li> <li>fig_3a.txt - phase of the Green's function corresponding to Fig. 3a</li> </ul> <p> </p>
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
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.