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8 results for “vortex dynamics”
Coherent vortex dynamics in a strongly-interacting superfluid on a silicon chip: Experimental and simulation data sets
<p>This data set collates the experimental and simulation data for the research paper "Coherent vortex dynamics in a strongly-interacting superfluid on a silicon chip".</p>
Vortex input files -- Ashe et al., "Minding the data-gap trap: predicting the dynamics of abundant dolphin species under uncertainty"
<p>Vortex input file used for analyses presented in:<br> "Minding the data-gap trap: predicting the dynamics of abundant dolphin species under uncertainty", <br> by Erin Ashe, Rob Williams, Christopher Clark, Christine Erbe, Leah Gerber, Ailsa Hall, Philip Hammond, Robert C. Lacy, Randall Reeves, & Nicole Vollmer<br> </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>
Vortex dynamics induced by scanning SQUID susceptometry
<p>We measured the local magnetic response of a niobium thin film by applying a millitesla-scale AC magnetic field using a micron-scale field coil and detecting the response with a micron-scale pickup loop in a scanning superconducting quantum interference device (SQUID) susceptometry measurement. Near the film's critical temperature, we observed a step-like nonlinear and dissipative magnetic response due to the dynamics of a small number of vortex-antivortex pairs induced in the film by the local applied AC field. We modeled the dynamics of the measurement using a combined two-dimensional London-Maxwell and time-dependent Ginzburg-Landau approach, allowing us to construct a detailed real-space picture of the vortex motion causing the observed dissipative response. This work pushes scanning SQUID susceptometry of two-dimensional superconductors beyond the regime of linear response and lays the foundation for microscopic studies of vortex dynamics and pinning in superconducting devices and more exotic materials systems.</p>
Fitacf data for "Ionospheric Flow Vortex Induced by the Sudden Decrease in the Solar Wind Dynamic Pressure"
<p>This is the SuperDARN dataset in fitacf format (2.5) from the Hankasalmi radar. The data is used in the publication: Jin, Y., Moen, J. I., Spicher, A., Liu, J., Clausen, L. B. N., & Miloch, W. J. (2023). Ionospheric flow vortex induced by the sudden decrease in the solar wind dynamic pressure. Journal of Geophysical Research: Space Physics, 128, e2023JA031690. https://doi.org/10.1029/2023JA031690</p>
Scaling the extinction vortex: Body size as a predictor of population dynamics close to extinction events
<ol> <li class="Body">Mutual reinforcement between abiotic and biotic factors can drive small populations into a catastrophic downward spiral to extinction – a process known as the 'extinction vortex.' However, empirical studies investigating extinction dynamics in relation to species' traits have been lacking.</li> <li class="Body">We assembled a database of 35 vertebrate populations monitored to extirpation over a period of at least ten years, represented by 32 different species, including 25 birds, five mammals and two reptiles. We supplemented these population time series with species-specific mean adult body size to investigate whether this key intrinsic trait affects the dynamics of populations declining towards extinction.</li> <li class="Body">We performed three analyses to quantify the effects of adult body size on three characteristics of population dynamics: time to extinction, population growth rate, and residual variability in population growth rate.</li> <li class="Body">Our results provide support for the existence of extinction vortex dynamics in extirpated populations. We show that populations typically decline non-linearly to extinction, while both the rate of population decline, and variability in population growth rate increase as extinction is approached. Our results also suggest that smaller-bodied species are particularly prone to the extinction vortex, with larger increases in rates of population decline and population growth rate variability when compared to larger-bodied species.</li> <li class="Body">Our results reaffirm and extend our understanding of extinction dynamics in real-life extirpated populations. In particular, we suggest that smaller-bodied species may be at greater risk of rapid collapse to extinction than larger-bodied species, and thus management of smaller-bodied species should focus on maintaining higher population abundances as a priority. </li> </ol>
Scaling the extinction vortex: Body size as a predictor of population dynamics close to extinction events
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Supplemental videos for submission "Dynamical mechanisms of vortex pinning in pure superfluid systems"
<p>Supplemental videos for submission "Dynamical mechanisms of vortex pinning in pure superfluid systems". A description for each of the videos can be found in the supplementary text of our submission.</p>
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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.