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1,938 results for “Resonance”
Meridional composite pulses for low-field magnetic resonance
<p>We discuss procedures for error-tolerant spin control in environments that permit transient, large-angle reorientation of magnetic bias field. Short sequences of non-resonant magnetic field pulses in a laboratory-frame meridional plane are derived. These are shown to have band-pass excitation properties comparable to established amplitude-modulated, resonant pulses used in high, static-field magnetic resonance. Using these meridional pulses, we demonstrate robust z inversion in proton (<sup>1</sup>H) nuclear magnetic resonance near Earth’s field.</p>
Real-time magnetic resonance imaging to study orthostatic intolerance mechanisms in human beings: Proof of concept
<p>This dataset was acquired at DLR, Cologne, Germany. The study complied with the Declaration of Helsinki, and was approved by the local ethics committee. All subjects gave written informed consent.</p> <p> </p> <p><strong>Data acquisition</strong><br> <em>MRI data</em></p> <p>All MR images were acquired on a Siemens 3T mMR Biograph using cardiac, spine and head coils. The scanning protocol consisted of the following sequences.</p> <ul> <li><strong>MPI70_SA20_FOV320_16X6MM_33MS</strong>: cardiac real-time MRI of the short axis (TR=2.56 ms; TE=1.62 ms; FA= 10°; 1.6x1.6 mm; 6 mm slice thickness; 20 slices; FoV320x320 mm; radial spokes 13)</li> <li><strong>MPI70_TP_PCMV100_FOV320_15X6MM_33MS</strong>: blood flow real-time MRI of the pulmonary trunk (TR=3.33 ms; TE=2.24 ms; FA= 10°; 1.5x1.5 mm; 6 mm slice thickness; FoV=320x320 mm; VENC=100 cm/s; radial spokes 5)</li> <li><strong>MPI70_PCMV100_FOV192_075X6MM_80MS:</strong> blood flow real-time MRI of the middle cerebral artery (TR=4.44 ms; TE=3.10 ms; FA= 12°; 0.75x0.75 mm; 6 mm slice thickness; FoV=192x192 mm; VENC=100 cm/s; radial spokes 9)</li> </ul> <p> </p> <p>Cinematic real-time MRI of the short axis view and blood flow measurements of the pulmonary trunk and in the left and right middle cerebral artery were acquired at baseline and during -30mmHg LBNP.</p> <p> </p> <p>Video files:</p> <p><a href="https://zenodo.org/record/7066642/files/Series_040_mpi70_SA20_FOV320_16x6mm_33ms_Slice_14.wmv?download=1">https://zenodo.org/record/7066642/files/Series_040_mpi70_SA20_FOV320_16x6mm_33ms_Slice_14.wmv?download=1</a></p> <p><a href="https://zenodo.org/record/7066642/files/Series_103_mpi70_SA20_FOV320_16x6mm_33ms_Slice_14.wmv?download=1">https://zenodo.org/record/7066642/files/Series_103_mpi70_SA20_FOV320_16x6mm_33ms_Slice_14.wmv?download=1</a></p> <p> </p> <p> </p>
Virtual cohort of fetal cases with suspected coarctation of the aorta from fetal three-dimensional magnetic resonance images
<p>The present dataset is a supplementary dataset to the paper: Hermida, U., van Poppel, M.P.M., Lloyd, D.F.A. <em>et al.</em> Learning the Hidden Signature of Fetal Arch Anatomy: a Three-Dimensional Shape Analysis in Suspected Coarctation of the Aorta. <em>J. of Cardiovasc. Trans. Res.</em> (2022). https://doi.org/10.1007/s12265-022-10335-9</p> <p><strong>Dataset Description: </strong></p> <p>We present a database of fetal great arch anatomical models derived from a statistical shape model (SSM) of fetuses with suspected coarctation of the aorta (CoA). The dataset consists of 1000 meshes including the fetal ascending aorta, arterial duct and descending aorta. For each synthetic case, the corresponding PCA coefficients for the 10 first PCA modes, as well as their CoA risk score, are shared. PCA scores are provided both as raw scores and Z-scores. </p> <p>To build the SSM, a dataset of 112 motion-corrected 3D fetal cardiovascular magnetic resonance (CMR) images and their corresponding segmentations from cases with suspected CoA was used. Data included confirmed CoA cases as well as false positive (FP) cases. Centerlines were extracted and aligned to build the SSM of the fetal great arches. </p> <p><strong>Source of funding</strong></p> <p>This work was supported by the Wellcome Trust IEH Award [102431] (iFIND project), by core funding from the Wellcome/EPSRC Centre for Medical Engineering [WT203148/Z/16/Z] and by the Rosetrees Trust [A2725]. The research was funded by the National Institute for Health Research (NIHR) Biomedical Research Centre based at Guy’s and St Thomas’ NHS Foundation Trust and King’s College London and supported by the NIHR Clinical Research Facility. The views expressed are those of the author(s) and not necessarily those of the NHS, the NIHR or the Department of Health. D.F.A. Lloyd acknowledges support from the Rothschild Foundation (2020/2017). P. Lamata holds a Wellcome Trust Senior Research Fellowship (209450/Z/17/Z).</p>
Beyond the exponential horn: a bush-cricket with ear-canals which function as coupled resonators
<p>Bush-crickets have dual-input, tympanal ears located in the tibia of their forelegs. The sound will, first of all, reach the external sides of the tympana, before arriving to the internal sides through the bush-cricket ear-canal, the acoustic trachea (AT), with a phase lapse and pressure gain. It has been shown that for many bush-crickets, the AT has an exponential horn-shaped morphology and function, producing a significant pressure gain above a certain cut-off frequency. However, the underlying mechanism of different AT designs remains elusive. In this study, we demonstrate that the AT of the duetting bush-cricket <em>Pterodichopetala</em> <em>cieloi</em> function as coupled resonators, producing sound pressure gains at the sex-specific conspecific calling song frequency, and attenuating the remainder – a functioning mechanism significantly different than an exponential horn. Furthermore, it is demonstrated that despite the sexual dimorphism between the <em>P</em>. <em>cieloi</em> AT, both male and female AT have a similar biophysical mechanism. The analysis was carried out using an interdisciplinary approach, where micro-computed tomography was used for the morphological properties of the <em>P</em>. <em>cieloi</em> AT, and a finite-element analysis was applied on the precise tracheal geometry to further justify the experimental results and to go beyond experimental limitations.</p>
Data accompanying "Petabit per second data transmission using a chip-scale microcomb ring resonator source"
<p>Data for reproducing the figures from the article: <strong>Petabit per second data transmission using a chip-scale microcomb ring resonator source. </strong></p>
Discontinuous Galerkin time-domain method for the computation of electromagnetic resonant modes
<p>Data generated for the paper "The application of a high-order discontinuous Galerkin time-domain method for the computation of electromagnetic resonant modes" published in Applied Mathematical Modelling. It includes:</p> <ul> <li>Meshes</li> <li>Time domain signals</li> <li>Spectra</li> <li>Figures</li> </ul>
Supplementary Data for "New Constraints on Gliese 876 - Exemplar of Mean-Motion Resonance"
<p>This repository contains supplementary material to the paper<br> Millholland, S., Laughlin, G., Teske, J., et al. "New Constraints on Gliese 876 - Exemplar of Mean-Motion Resonance." 2018, AJ, in press</p> <p>The file, "posterior_samples.csv", contains DE-MCMC posterior parameter samples for the four-planet coplanar radial velocity fit, which is described in Section 4 and summarized in Table 4 of the paper. The epoch of fit is 2450602.09311 BJD. <br> To fit within file size limitations, the posterior samples were thinned by uniqueness. The columns of the files are provided below. For the planet parameters, the columns are in orbital period order (i.e. planets "d", "c", "b", "e"). </p> <p>0-3 Periods (days) <br> 4-7 Semi-major axes (AU) <br> 8-11 RV semi-amplitudes (m/s) <br> 12-15 Masses (Earth masses) <br> 16-19 Eccentricities <br> 20-23 Arguments of periastron (degrees) <br> 24-27 Mean anomalies (degrees) <br> 28-31 Arg. of peri. plus mean anom. (degrees) <br> 32-35 e cos(arg. peri.)<br> 36-39 e sin(arg. peri.)<br> 40-43 Longitude of the ascending node (degrees) <br> 44-47 Inclination (degrees) <br> 48-53 RV zero-point offsets (m/s) <br> 54-59 Sigma jitter terms (m/s) <br> 60 h (m/s) <br> 61 w <br> 62 logP_rot (log days) <br> 63 Lambda (days) <br> 64 log-likelihood </p> <p>Feel free to direct questions or comments to sarah [dot] millholland [at] yale [dot] edu.</p>
New Constraints on Gliese 876 - Exemplar of Mean-Motion Resonance: Supplementary Data
<p>Gliese 876 - Posterior Samples from RV Fit</p> <p>This respository contains supplementary material to the paper <br> Millholland, S., Laughlin, G., Teske, J., et al. <em>New Constraints on Gliese 876 - Exemplar of Mean-Motion Resonance. </em>2018, AJ, in press</p> <p>The file "posterior_samples_4pl_fit.csv" contains DE-MCMC posterior parameter samples for the four-planet coplanar radial velocity fit, which is described in Section 4 and summarized in Table 4 of the paper. The epoch of fit is 2450602.09311 BJD. <br> To fit within file size limitations, the posterior samples were thinned by uniqueness. The columns of the files are provided below. For the planet parameters, the columns are in orbital period order (i.e. planets "d", "c", "b", "e").</p> <p>0-3 Periods (days) <br> 4-7 Semi-major axes (AU) <br> 8-11 Masses (Earth masses) <br> 12-15 Eccentricities <br> 16-19 Arguments of periastron (degrees) <br> 20-23 Mean anomalies (degrees) <br> 24-27 Arg. of peri. plus mean anom. (degrees) <br> 28 Inclination (degrees) <br> 29-34 RV zero-point offsets (m/s) <br> 35-40 Sigma jitter terms (m/s) <br> 41 h (m/s) <br> 42 w <br> 45 logP_rot (log days) <br> 46 Lambda (days) <br> 47 log-likelihood </p> <p>Feel free to direct questions or comments to sarah [dot] millholland [at] yale [dot] edu.</p>
Modular Torso Motion Phantom for Magnetic Resonance Imaging (MRI)
<p>This data set contains CAD models, code and information for the construction of a <span>Modular Torso Motion Phantom for Magnetic Resonance Imaging (MRI).<span><br></span></span></p>
Water Solvent Reorganization upon Ultrafast Resonant Stimulated X‑ray Raman Excitation of a Metalloporphyrin Dimer
<p><strong>Abstract</strong></p> <p>We propose an X-ray Raman pump - X-ray diffraction probe scheme to follow solvation dynamics upon charge migration in a solute molecule. The X-ray Raman pump selectively prepares a valence electronic wavepacket in the solute, while the probe provides information on the entire molecular ensemble. A combination of Molecular Dynamics (MD) and <em>ab initio</em> quantum chemistry simulations is applied to a Zn-Ni porphyrin dimer in water. Using time-resolved X-ray diffraction and pair distribution functions, solvation shell dynamics are extracted.</p> <p><strong>Datasets for the plots</strong></p> <p>data_rdf: Contains RDF data in netcdf4 (readable by xarray) and averaged CSV files.</p> <p>data_sfac: Contains scattering data in netcdf4 (readable by xarray) and averaged CSV files.</p> <p>data_ener: Contains CP2K energy file data for all reference and production runs.</p> <p>data_cdf: Contains csv data files for cumulative distribution function.</p> <p>data_sdf: Contains the cubes files for spatial distribution function.</p> <p>python_codes: Contains python code snippets for recreating figures from the above datasets.</p>
Dataset for Non-resonant Anomaly Detection with Background Extrapolation
<p>These are the datasets used in the journal version of the Non-resonant Anomaly Detection with Background Extrapolation paper. The datasets are simulated using MadGraph5 aMC@NLO, Pythia 8.310, and Delphes. There are 0.2M signal events of semi-visible jets in five sets of parameters (invisible-ratio, Z' mass) = { (1/3, 4 TeV), (1/3, 2 TeV), (1/3, 3 TeV), (0, 4 TeV), (2/3, 4 TeV) }, 18.6M background events of SM QCD jets (including background, ideal AD background, and simulated background) for training, and 21.4M background events for testing. The detailed breakdown of number of events after selections in different regions is listed in Table1 of the paper. The input parameter cards used for generating background and signal events are also included.</p>
Data and models to accompany "Turgor pressure affects transverse stiffness and resonant frequencies of buzz-pollinated poricidal anthers"
<p>Data sets and models to accompany the paper "Turgor pressure affects transverse stiffness and resonant frequencies of buzz-pollinated poricidal anthers". </p>
Combining Dipole and Loop Coil Elements for 7 T Magnetic Resonance Studies of the Human Calf Muscle - Dataset
<p>Data necessray to reprodice and to verify the results of the publication "Combining Dipoles and Loops for High SNR and Parallel Imaging Performance in Human Calf Muscle Studies at 7 T".</p>
High-power in-phase and anti-phase mode emission from linear arrays of resonant-tunneling-diode oscillators in the 0.4-to-0.8-THz frequency range - data
<p>Experimental and simulation data from the paper "High-power in-phase and anti-phase mode emission from linear arrays of resonant-tunneling-diode oscillators in the 0.4-to-0.8-THz frequency range".</p>
Surface Plasmon Resonance Biosensor with Anti-Crossing Modulation Readout
Open the record for dataset details and reuse information.
Resonant Scattering of Sub-keV Electrons by Beam-driven Electron Cyclotron Harmonic Waves
<p>Data repository for ``Resonant Scattering of Sub-keV Electrons by Beam-driven Electron Cyclotron Harmonic Waves''. This repository contains raytracing results of beam-driven ECH waves and loss-cone-driven ECH waves calculated from HOTRAY ray-tracing program.</p>
Research Data - Magnetic Field Controlled Surface Localization of Spin-Wave Ferromagnetic Resonance Modes in 3D Nanostructures
<p>Source data from micromagnetic simulations performed in COMSOL Multiphysics software and Python codes for data post-processing utilized in the paper "Magnetic Field Controlled Surface Localization of Spin-Wave Ferromagnetic Resonance Modes in 3D Nanostructures."</p> <p>The files from Comsol (.mph) are without simulation solutions due to their large size - please contact me if needed.</p>
Screening compounds of interest against USP5 Zf-UBD with a surface plasmon resonance assay
<p>The determination of binding affinities of compounds of interest against USP5 zinc finger ubiquitin binding domain (Zf-UBD) with a surface plasmon resonance (SPR) assay. </p>
Automatic registration of magnetic resonance and optoacoustic tomography
<p>optoacoustic / photoacoustic tomography - magnetic resonance imaging registration dataset.</p> <p>1. phantom with fiducial marker inserts</p> <p>2. ex vivo mouse brain</p> <p>3. in vivo mouse brain </p> <p>4. RegOA registration application </p>
Rawdata of a bibliometric analysis of liver fibrosis magnetic resonance imaging research from 1998 to 2017
<p>The details of all literature downloaded from WoSCC as plain-text files including the full records.</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.