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44 results for “Flicker”
Dataset for "Flickering of the Vela pulsar during its 2016 glitch"
<p>Dataset for the paper "Flickering of the Vela pulsar during its 2016 glitch". These files contain the summary statistics for each individual pulse around the glitch (kb_database_2016-12-12.h5) and during a period away from the glitch (kb_database_2016-09-18.h5). We additionally provide two scripts and a matplotlib stylefile to recreate Figures 1a and 1b from the publication.</p>
Posterior PDF samples for flicker model parameters
<p>h5py files containing posterior PDF samples of the flicker-logg-rho_star relations described in the associated paper (submitted).</p>
Updated posterior PDF samples for flicker model parameters
<p>Updated posterior PDF samples for for the model parameters of the flicker-logg-rho_star relations. </p>
Single-flicker online SSVEP BCI datset
<p>The zip archive contains EEG data from a newly developed brain-computer interface paradigm. The method is described in [1], and the dataset has been recorded for the application described in [2]. The two folders in the archive contain data from the training (offline) session and from the online session.</p> <p>Training data: Each subject has two training sessions. The .xdf files were generated by the Lab Streaming Layer (https://github.com/sccn/labstreaminglayer) from EEG data that were recorded using a BioSemi 32 channel amplifier. The files name after (subject_number)_(session_num).xdf. Each file includes 200 trials (50 trials for each direction).</p> <p>Online data: Each file contains data from one round of the game. The file name pattern is (subject_num)_(repeat_num) _(ramdon_background_num).mat. The Matlab data structure contains the following fields:<br> data. fsample: sampling rate (512 Hz)<br> data.trial: EEG signals for each step<br> data.time: time series of EEG signals for each step<br> data.class: classifier output for each step</p> <p>[1] Maye A, Zhang D, Engel AK (2017) "<a href="https://ieeexplore.ieee.org/abstract/document/7911330">Utilizing Retinotopic Mapping for a Multi-Target SSVEP BCI With a Single Flicker Frequency</a>", IEEE Transactions on Neural Systems and Rehabilitation Engineering, vol. 25, no. 7, pp. 1026-1036, July 2017, doi: 10.1109/TNSRE.2017.2666479.</p> <p>[2] Chen J, Zhang D, Engel AK, Gong Q, Maye A (2017) "<a href="https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0178385">Application of a single-flicker online SSVEP BCI</a>" for spatial navigation", PLoS ONE, 12(5): e0178385. <a href="https://doi.org/10.1371/journal.pone.0178385">https://doi.org/10.1371/journal.pone.0178385</a></p>
iGluSnFR wide-field imaging responses to 2-72 Hz flicker
Open the record for dataset details and reuse information.
Flickering Lights
This 3D representation is based on the The Curious Unicorn concept artwork. https://www.thecuriousunicorn.com/ Source: Objaverse 1.0 / Sketchfab
Effects of Sensory Flicker and Electrical Flicker Stimulation
ClinicalTrials.gov study NCT04188834. IPD Sharing: YES. Countries: 1. Publications: 1.
Study on Gamma Sensory Flicker for Insomnia
ClinicalTrials.gov study NCT06322524. IPD Sharing: UNDECIDED. Countries: 1. Publications: 5.
Photopic flicker optoretinography captures the light-driven length modulation of photoreceptors during phototransduction
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Mitigating flicker noise in high-precision photometry. I - Characterization of the noise structure, impact on the inferred transit parameters, and predictions for CHEOPS observations
<p>This repository contains the publicly available artificial exoplanet transit light curves that has been generated in HMI observations.</p> <p>Descriptions of the data are encapsulated in the READme.dat file. For further details, please report to Sec. 3 of the paper (arXiV link: <a href="https://arxiv.org/abs/2003.07707">https://arxiv.org/abs/2003.07707</a>).</p> <p>If you find these synthetic data useful in your own research please cite the Sulis. et al., (2020) paper.</p> <p> </p> <p> </p> <p> </p> <p> </p>
Data from: Condition-dependent expression of carotenoid- and melanin-based plumage colour of northern flicker nestlings revealed by manipulation of brood size
Carotenoid-based colouration in feathers is widely accepted to be a reliable signal of the health of an individual, but the condition-dependence of melanin-based plumage ornaments has been highly debated. Using broods that were manipulated in size, we tested whether nutritional stress during rearing affected the carotenoid pigmentation in secondary feathers and the size, shape, and symmetry of melanin spots on breast plumage of northern flicker Colaptes auratus nestlings. Two measures of carotenoid colour (chroma and brightness) of secondary flight feathers did not vary according to brood size treatment, but in a larger dataset from the population, carotenoid chroma was positively associated with nestling mass. Nestlings from experimentally enlarged broods had smaller melanin spots than those from reduced broods, which is some of the first experimental evidence that melanin ornament size in growing nestlings is condition-dependent. However, the shape and symmetry of the melanin breast spots was not associated with nestling mass. Sexual dimorphism was apparent in both types of pigmentation and future studies should investigate whether there are any trade-offs for nestlings between investing in carotenoid colouration and melanisation and whether trade-offs differ between the sexes.
Data from: Flickers of speciation? Sympatric color morphs of the arc-eye hawkfish, Paracirrhites arcatus, reveal key elements of divergence-with-gene-flow
One of the primary challenges of evolutionary research is to identify ecological factors that favor reproductive isolation. Therefore, studying partially isolated taxa has the potential to provide novel insight into the mechanisms of evolutionary divergence. Our study utilizes an adaptive color polymorphism in the arc-eye hawkfish (Paracirrhites arcatus) to explore the evolution of reproductive barriers in the absence of geographic isolation. Dark and light morphs are ecologically partitioned into basaltic and coral microhabitats a few meters apart. To test whether ecological barriers have reduced gene flow among dark and light phenotypes, we evaluated genetic variation at 30 microsatellite loci and a nuclear exon (Mc1r) associated with melanistic coloration. We report low, but significant microsatellite differentiation among color morphs and stronger divergence in the coding region of Mc1r indicating signatures of selection. Critically, we observed greater genetic divergence between color morphs on the same reefs than between the same morphs in different geographic locations. We hypothesize that adaptation to the contrasting microhabitats is overriding gene flow and is responsible for the partial reproductive isolation observed between sympatric color morphs. Combined with complementary studies of hawkfish ecology and behavior, these genetic results indicate an ecological barrier to gene flow initiated by habitat selection and enhanced by assortative mating. Hence the arc-eye hawkfish fulfill theoretical expectations for the earliest phase of speciation-with-gene-flow.
Revisiting a classic hybrid zone: movement of the northern flicker hybrid zone in contemporary times
<p><span><span><span><span><span><span><span><span><span><span><span>Natural hybrid zones have provided important insights into the evolutionary process, and their geographic dynamics over time can help to disentangle the underlying biological processes that maintain them. Here, we leverage replicated sampling of an identical transect across the hybrid zone between yellow-shafted and red-shafted flickers in the Great Plains to assess its stability over ~60 years (1955-1957 to 2016-2018). We identify a ~73 km westward shift in the hybrid zone center towards the range of the red-shafted flicker, but find no associated changes in width over our sampling period. In fact, the hybrid zone remains remarkably narrow, suggesting some kind of selective pressure maintains the zone. By comparing to previous work in the same geographic region, it appears likely that the movement in the hybrid zone has occurred in the years since the early 1980s. This recent movement may be related to changes in climate or land management practices that have allowed asymmetric westward movement of yellow-shafted flickers into the Great Plains.</span></span></span></span></span></span></span></span></span></span></span></p>
EEG raw data from a flickering checkerboard stimulation
<p>Database composed of 8 participants (aged between 21 and 44 years) EEG datasets.</p> <p>Stimuli presented dich-optically (60 Hz refresh rate and 1920x1080 pixel resolution). Monochromatic visual stimulation, alternating between two patterns: <em>off</em> and <em>on</em>. Off<em> -</em> presentation of a homogeneous gray screen (luminance set at half of its dynamic range). On - checkerboard inverting at 20 Hz, superimposed on a gray homogeneous background. </p> <p>The files are *.mat datasets with raw EEG signal (1000 Hz sampling rate).</p> <p>Each trial comprehends a stimulation sequence of approximately 3 minutes.</p> <p>Legend:<br> 'VLEOGD' = vertical left electrooculogram down<br> 'VLEOGU' = vertical left electrooculogram up <br> 'HLEOG' = horizontal left electrooculogram <br> 'HREOG' = horizontal right electrooculogram <br> 'LumSens' = photodiode<br> 'RIndEMG' = right Index finger electromyogram</p>
Data and Codes used in the study: Flickering Gamma-Ray Flashes, the Missing Link between Gamma Glows and TGFs
<p>Description is given in the uploaded pdf document: Data_codes_description.pdf</p>
Datasets for reproducing the results in "True random number generators with flicker noise: stochastic model, min-entropy calculation and online test"
<p>Datasets for reproducing the results in "True random number generators with flicker noise: stochastic model, min-entropy calculation and online test"</p> <p>Includes scripts for generating raw results, postprocessing scripts, as well as scripts/notebooks for generating plots for the manuscript</p>
Data from: A flicker of hope: genomic data distinguish Northern Flicker taxa despite low levels of divergence
Next-generation sequencing technologies are increasingly being employed to explore patterns of genomic variation in avian taxa previously characterized using morphology and/or traditional genetic markers. The hybridization dynamics of the Northern Flicker complex have received considerable attention, primarily due to the conspicuous plumage differences among these birds and the geographically extensive hybrid zone between the Red-shafted (Colaptes auratus cafer) and Yellow-shafted (Colaptes auratus auratus) flickers in the Great Plains region of North America. However, no traditional molecular techniques have been able to differentiate these 2 morphologically well-defined taxa from one another, or conclusively from the closely related Gilded Flicker (Colaptes chrysoides). Here, we use a next-generation sequencing approach to assess the genetic diversity and evolutionary history of these 3 taxa. We confirm the overall low levels of differentiation found using traditional molecular markers, but are able to distinguish between the 3 taxa for the first time, using a dataset of thousands of SNP loci distributed across the genome. Through demographic modeling and phylogenetic reconstructions, we find that Red-shafted and Yellow-shafted flickers are likely sister taxa, and that their divergence from the Gilded Flicker was comparatively older. The low level of divergence and lack of fixed differences in our dataset between Red-shafted and Yellow-shafted flickers, in particular, suggests whole-genome re-sequencing may be necessary to assess the dynamics of their hybridization and identify the genetic basis of their striking differences in plumage.
Measurement of Total Retinal Blood Flow During Flicker Stimulation in Healthy Subjects
ClinicalTrials.gov study NCT02531399. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Study of Stimulus Parameters in Flicker Electroretinogram (ERG)
ClinicalTrials.gov study NCT02466607. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Feasibility of Critical Flicker Frequency Procedure for the Diagnosis of Minimal Encephalopathy
ClinicalTrials.gov study NCT01080144. IPD Sharing: Not stated. Countries: 1. Publications: 1.
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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.