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20 results for “mechanical resonance”
Integration of High-Tc Superconductors with High-Q-Factor Oxide Mechanical Resonators (Dataset)
<p>Micro-mechanical resonators are building blocks of a variety of applications in basic science and consumer electronics. This device technology is mainly based on well-established and reproducible silicon-based fabrication processes with outstanding performances in term of mechanical <em>Q</em>-factor and sensitivity to external perturbations. Broadening the functionalities of micro-electro-mechanical systems (MEMS) by the integration of functional materials is a key step for both applied and fundamental science. However, combining functional materials with silicon-based devices is challenging. An alternative approach is directly fabricating MEMS based on compounds inherently showing non-trivial functional properties, such as transition metal oxides. Here, a full-oxide approach is reported, where a high-Tc superconductor YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub> (YBCO) is integrated with high <em>Q</em>-factor micro-bridge resonators made of single-crystal LaAlO<sub>3</sub> (LAO) thin films. LAO resonators are tensile strained, with a stress of about 350 MPa, show a <em>Q</em>-factor above 200k, and have low roughness. YBCO overlayers are grown ex situ by pulsed laser deposition and YBCO/LAO bridges show zero resistance below 78 K and mechanical properties similar to those of bare LAO resonators. These results open new possibilities toward the development of advanced transducers, such as bolometers or magnetic field detectors, as well as experiments in solid state physics, material science, and quantum opto-mechanics.</p>
Thickness dependence of the mechanical properties of piezoelectric high-Q_m nanomechanical resonators made from aluminium nitride
<p>Data used for figures in "Thickness dependence of the mechanical properties of piezoelectric high-Q_m nanomechanical resonators made from aluminium nitride" Anastasiia Ciers et.al <a href="https://doi.org/10.1088/2633-4356/ad9b64">Materials for Quantum Technology <strong>4</strong>, 046301 (2024)</a>; <a href="https://doi.org/10.48550/arXiv.2410.03944">arXiv:2410.03944 [cond-mat.mes-hall] (2024)</a></p>
Reverberant Magnetic Resonance Elastographic Using a single Mechanical Driver
<p>Reverberant elastography provides fast and robust estimates of shear modulus. However, reverberant elastography uses multiple mechanical drivers, hampering clinical utility. In this work, we hypothesize that a single mechanical driver can generate reverberant shear fields in constrained organs such as the brain. To corroborate this hypothesis, we imaged the brain of a healthy volunteer; and two constrained phantoms containing spherical inclusions with diameters ranging from 4-18 mm. As a secondary goal, we assessed the feasibility of recovering shear modulus from a single component of the reverberant wave field. Viable reverberant and subzone elastograms were produced only when obtained at 50 and 100 Hz in phantoms. Different levels of reverberance were exhibited in different displacement components (70-82% for phantoms and 87-93% for the clinical case); however, wavefields obtained when imaging at 50 Hz and 100 Hz were not significantly different (p>0.05). Errors incurred in reverberant elastograms varied from 5% to 65% when imaging at 50 Hz and 2% to 55% when imaging at 100 Hz. Errors incurred in subzone elastograms ranged from 4% to 18% at 50 Hz and 5% and 50% at 100 Hz. The contrast-to-noise ratio of reverberant elastograms ranged from 20 dB to 44 dB compared to 25 dB to 31 dB in subzone elastograms. The accuracy of the elastograms acquired from the phantom containing internal shear wave reflectors did not differ noticeably. The global brain stiffness estimated from reverberant and subzone elastograms was 2.36 ± 0.95 kPa and 2.5 ± 1.1 kPa, respectively, when imaging at 50 Hz, and 2.56 ± 0.828 kPa and 2.89 ± 1.3 kPa respectively, when imaging at 70 Hz. The phantom study revealed that performance varied depending on the component of displacement used to compute reverberant elastograms; however, the clinical study demonstrated similar performance of reverberant and subzone elastograms</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>
Data from: Active-feedback quantum control of an integrated, low-frequency mechanical resonator
<p>Source data for Figures.</p>
Synchronization mechanism within the blind zone of the differential resonant accelerometer
Open the record for dataset details and reuse information.
Data for "Coherent phonon dynamics in spatially-separated graphene mechanical resonators"
<p>Data for "Coherent phonon dynamics in spatially-separated graphene mechanical resonators"</p>
Mode coupling bi-stability and spectral broadening in buckled carbon nanotube mechanical resonators
<p>Data availability for the Figures of the manuscript.</p>
Mechanically Tunable Lattice-Plasmon Resonances by Templated Self-Assembled Superlattices for Multi- Wavelength Surface-Enhanced Raman Spectroscopy
<p>Related publication: Charconnet, M; Kuttner, C; Plou, J; Garcia-Pomar, JL; Mihi, A; Liz-Marzan, LM; Seifert, A. Mechanically Tunable Lattice-Plasmon Resonances by Templated Self-Assembled Superlattices for Multi-Wavelength Surface-Enhanced Raman Spectroscopy. <em>Small Methods</em> 2021, 2100453. 10.1002/smtd.202100453</p>
Data and Code for Needle Tracking and Temperature Sensing with Miniature Magneto-Mechanical Resonators
<p>This zip-file contains experimental data and processing routines related to the manuscript</p> <p>"Miniature Magneto-Mechanical Resonators for Wireless Tracking and Sensing" by Bernhard Gleich, Ingo Schmale, Tim Nielsen, and Jürgen Rahmer*.</p> <p>Philips Research; Roentgenstrasse 24-26, 22335 Hamburg, Germany</p> <p>*Corresponding author. Email: juergen.rahmer@philips.com</p>
Characterization of Changes in Ventricular Mechanics in Response to Lexiscan Stress Using Tagged Cine Cardiac Magnetic Resonance Imaging
ClinicalTrials.gov study NCT02115308. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Intima Versus Adventitia Drug Delivery to Elucidate Mechanisms of Restenosis: Magnetic Resonance Imaging
ClinicalTrials.gov study NCT02807779. IPD Sharing: NO. Countries: 1. Publications: 0.
Molecular absorption and evolution mechanisms of PM2.5 brown carbon revealed by electrospray ionization -Fourier-transform ion cyclotron resonance mass spectrometry during a severe winter pollution episode in Xi'an, China
<p>42 PM<sub>2<em>.</em>5</sub> samples were collected during a severe pollution episode in January 2017 over Xi’an, China for a comprehensive non-target and full scanning of Brown carbon molecules and their absorption properties using electrospray ionization–Fourier-transform ion cyclotron resonance mass spectrometry(FTICRMS). Here are the data sets of FTICRMS intensity, formula, organic carbon (OC) and absorption at 365nm of the 42 samples.</p>
Coupling microwave photons to a mechanical resonator using quantum interference
<p>This contains the data and processing scripts used for the figures of the manuscript "Coupling microwave photons to a mechanical resonator using quantum interference"</p>
EXercise Cardiac Magnetic Resonance Assessment of Left Atrial Mechanics Following Ablation
ClinicalTrials.gov study NCT06212791. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Risk Assessment and Mechanism Analysis of Intracranial Multiple Aneurysm Instability Based on High-resolution Magnetic Resonance, Imaging Histology and Hemodynamics
ClinicalTrials.gov study NCT06539767. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Assessing Motor Neuron Disease Mechanisms by Threshold Tracking Transcranial Magnetic Stimulation and Magnetic Resonance Spectroscopy
ClinicalTrials.gov study NCT03664206. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
Mechanism and Dosimetry Exploration in TES Magnetic Resonance Current Mapping Methods
ClinicalTrials.gov study NCT03772210. IPD Sharing: YES. Countries: 1. Publications: 0.
To Study the Mechanisms of Acupuncture Through Functional Magnetic Resonance Imaging and Peripheral Neurosensory Testing
ClinicalTrials.gov study NCT00521547. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Multimodal Magnetic Resonance Imaging Study on the Neural Mechanisms of Remission in Children With ADHD
ClinicalTrials.gov study NCT05229627. IPD Sharing: UNDECIDED. Countries: 0. Publications: 0.
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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.