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750 results for “coherence”
Data and code for article "Mid-infrared frequency comb via coherent dispersive wave generation in silicon nitride nano-photonic waveguides"
<p>This dataset contains the data presented in the figures of the article "Mid-infrared frequency comb via coherent dispersive wave generation in silicon nitride nano-photonic waveguides" (doi:10.1038/s41566-018-0144-1).</p> <p>The raw data in figures (curved plots) is packaged as an independent OriginLab project file (.opj). </p> <p>The layout of the design of the silicon nitride nano-photonic waveguide is presented. Fabrication process card (shown as a diagram) is provided as well.</p> <p>The source code for simulations presented in the article is also presented.</p>
Data for "The hydrodynamic response of the sediment-water interface to coherent turbulent motions"
<p>The data provided can be used to reproduce the figures presented in the manuscript titled "The hydrodynamic response of the sediment-water interface to coherent turbulent motions" submitted to Geophysical Research Letters.</p>
CoHERE Work Package 1 Museum Visitor Survey Interviews
<p>The CoHERE project seeks to identify, understand and valorise European heritages, engaging with their <strong>socio-political and cultural significance </strong>and their potential for developing <strong>communitarian identities</strong>. CoHERE addresses an intensifying EU Crisis through a study of relations between identities and representations and performances of history. </p> <p>The data was produced as part of CoHERE Work Package 1 - Productions and omissions of European heritage. This provides a critical foundation for CoHERE as a whole, interrogating different meanings of heritage, historical constructions and representations of Europe, formative histories for European identities that are neglected or hidden because of political circumstances, and non-official heritage.</p> <p>The interviews were carried out at selected museums, heritage sites and heritage events across Europe. The interview schedule posed questions about heritage consumption, identity, Europe and their experience of the site/event where the interview took place. Interviews have been transcribed and de-identified.</p>
Statistical Identification of Coherent and Incoherent Random Lasing from Carbon Dots
<p><span>Here we demonstrate RL emission at ~565 nm from green emitting CDs (gCDs), and we use the emitted light as a light source for speckle-free microscopy of biological tissues and microparticles. The emission of the CD-based RL is thoroughly studied as a function of experimental conditions, and well-established mathematical tools in the field are used to perform a detailed statistical study of the lasing output. The CD-based RL displays ultra-narrow (~ 0.70 nm) emission lines over a comparatively broader (~10 nm) background. These two emissions are due to, so-called, coherent and incoherent RL. Their relative weight can be controlled by an appropriate choice of experimental conditions, allowing to tune the characteristics of RL light. The results demonstrate the potential of gCDs as a viable alternative to environmental unfriendly, scarce, or chemically unstable nanomaterials as gain media for RL with customizable emissions.</span></p>
Dataset for the manuscript "Self-Supervised Coherence-Based Denoising on Cryoseismological Distributed Acoustic Sensing Data"
<p>The dataset contains cryoseismological data recorded in July 2020 on the Rhonegletscher, Switzerland, collected using both Distributed Acoustic Sensing and seismometers.<br>This dataset provides the necessary data to reproduce the results presented in the paper “Self-Supervised Coherence-Based Denoising on Cryoseismological Distributed Acoustic Sensing Data.” The corresponding code is available on GitHub, and the paper can be accessed via Authorea.</p> <p> </p> <p>Abstract: </p> <p>One major challenge in cryoseismology is that signals of interest are often buried within the high noise level emitted by a multitude of environmental processes. Events of interest potentially stay unnoticed and remain unanalyzed, particularly because conventional sensors cannot monitor an entire glacier. However, with Distributed Acoustic Sensing (DAS), we can observe seismicity over multiple kilometers. DAS systems turn common fiber-optic cables into seismic arrays that measure strain rate data, enabling researchers to acquire seismic data in hard-to-access areas with high spatial and temporal resolution. We deployed a DAS system on Rhonegletscher, Switzerland, using a 9 km long fiberoptic cable that covered the entire glacier, from its accumulation to its ablation zone, recording seismicity for one month. The highly active and dynamic cryospheric environ ment, in combination with poor coupling, resulted in DAS data characterized by a low Signal-to-Noise Ratio (SNR) compared to classical point sensors. Our objective is to ef fectively denoise this dataset.<br>We use a self-supervised J -invariant U-net autoencoder capable of separating incoherent environmental noise from temporally and spatially coherent signals of interest (e.g., stick-slip or crevasse signals). The method shows enhanced inter-channel coherence, increased SNR, and significantly improved visibility of the icequakes. Further, we compare different training data types varying in recording position, wavefield component, and waveform diversity. Our approach has the potential to enhance the detection capabilities of events of interest in cryoseismological DAS data, hence to improve the understanding of processes within Alpine glaciers.</p>
A candidate coherent radio flash following a neutron star merger
<p>This is a reproduction file for the paper ``A candidate coherent radio flash following a neutron star merger``. The sources of the raw data are provided, the link to the calibration and imaging pipeline used, and the scripts required to reproduce the results.</p>
Atchafalaya UAVSAR interferograms, coherence files and 3-class masks
<p>The dataset contains,</p> <ol> <li>UAVSAR interferograms and coherence files generated with SAR data acquired over Atchafalaya basin in coastal Louisiana, USA.</li> <li>Three class (wetland, open water, intermittent flow) maps generated using interferometric coherence for high (rising-to-high) and low (ebbing-to-low) tide conditions.</li> </ol>
Fig. 4 in Molecular phylogenetics of Phyllanthus sensu lato (Phyllanthaceae): Towards coherent monophyletic taxa
Fig. 4. Bayesian majority-rule consensus tree of the full combined nuclear (ITS, PHYC) and chloroplast (accD-psaI, matK, trnS-trnG) datasets for Phyllanthus and related genera; posterior probabilities (PP) are displayed at the nodes; infrageneric classification follows Bouman & al. (2018a); subgenera are given above colored clades, sections to the right. Outgroups and some ingroup genera are collapsed (see full tree in suppl. Fig. S10). Manuscript names of new undescribed species are indicated with an asterisk.
Fig. 3 in Molecular phylogenetics of Phyllanthus sensu lato (Phyllanthaceae): Towards coherent monophyletic taxa
Fig. 3. Molecular phylogenetic relationships of tribe Phyllantheae, simplified from Fig. 4 showing genera and subgenera. Colouring of clades follows Fig. 4, and paraphyly is highlighted with a red-white triangle (). Several morphological characters and character states are shown: B, branching non-phyllanthoid (), sub-phyllanthoid () or phyllanthoid (); D, disc present (), absent () or when both variations occur in the clade (); A, androphore filaments free (), fused () or when both are present (), whorled stamens (); F, fruit capsules (), berries (), or when both are present (); S, average stamens number.
Fig. 2 in Molecular phylogenetics of Phyllanthus sensu lato (Phyllanthaceae): Towards coherent monophyletic taxa
Fig. 2. Schematic design for the marker PHYC (A), accD-psaI (B) and trnS-trnG (C) spacer with newly designed primers indicated by arrowheads. Number behind primer names indicates approximate nucleotide position within the marker including insertions in the matrix. PHYC figure adapted from Samuel & al. (2005).
Fig. 1 in Molecular phylogenetics of Phyllanthus sensu lato (Phyllanthaceae): Towards coherent monophyletic taxa
Fig. 1. Major characters of Phyllanthus and the related genera Breynia and Glochidion. A, Habit of the herbaceous P. tenellus (P. subg. Tenellanthus); B, Habit of P. watsonii (P. subg. Eriococcus); C, Habit and fruits of P. emblica (P. subg. Emblica); D, Non-phyllanthoid branching in P. myrtellus; note the leaves subtending lateral branches (P. subg. Macraea); E, Sub-phyllanthoid branching in a young plant of P. glaucus, lateral branches are deciduous (P. subg. Kirganelia); F, Phyllanthoid branching and phylloclades in P. arbucula (P. subg. Xylophylla); G, Young capsules of P. myrtellus (P. subg. Macraea); H, Dehisced capsule of P. juglandifolius (P. subg. Xylophylla); I, Berries on a specialized leafless branchlet of P. microcarpus (P. subg. Kirganelia); J, Capsules of G. eriocarpum with orange arillate seeds exposed in some (Glochidion); K, Staminate flowers of P. pulcher (P. subg. Eriococcus); L, Pistillate flowers of P. pulcher (P. subg. Eriococcus); M, Flowers of P. mimosoides (P. subg. Xylophylla); N, Flowers of P. arbuscula (P. subg. Xylophylla); O, Staminate flower of P. cf. poilanei (P. subg. Phyllanthodendron); P, Pistillate flower of B. androgyna (Breynia). — Photos: A, C–G, I–M & O by R.W. Bouman; B © R.-Y. Yu; H by J.S. Strijk; N © M.S. Nuraliev.
Density maps of seismic localization with a low phase coherence at 13 Hz on Argentière glacier
<p>This dataset is associated with the paper:</p> <p>----------</p> <p><strong>Dynamic imaging of glacier structures at high-resolution using source localization: a dense seismic array experiment.</strong></p> <p> </p> <p><em>Ugo Nanni<sup>1,*</sup>, Philippe Roux<sup>2</sup>, Florent Gimbert<sup>1</sup> and Albanne Lecointre<sup>2</sup></em></p> <p> </p> <p><em><sup>1</sup> IGE, Univ. Grenoble Alpes, CNRS, IRD, Grenoble, France</em></p> <p><em><sup>2</sup> ISTerre, Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, Grenoble, France</em></p> <p><em>---------</em></p> <p>It contains 32 maps of seismic localization associated with low phase coherence and frequency of 13 Hz, and represents the events originating from transverse crevasses (see details in the paper).</p> <p>An image of the glacier is also provided to compare the localization to the glacier structure.</p> <p>Dataset is in .mat format</p> <p> </p>
Uptime data for 'Coherent fiber links operated for years: effect of missing data'
<p>Data of the total uptime of the comparison between two clocks, used in figure 13, in the article "Coherent fiber links operated for years: effect of missing data", doi: 10.1088/1681-7575/ac938e,.</p>
Text-fig. 17. Scanning electron microscope (SEM) images of fruits of Serialis communis (a) and Serialis crassitesta (b); Catefica locality, Portugal. a) Oblique lateral view of fruit showing three laterally coherent seeds from which the fruit wall has been almost completely lost showing the prominent micropylar region; b) Oblique lateral view of fruit containing three or four laterally coherent seeds with their micropylar regions oriented to the left. Specimens, Catefica MM92-P0167 (a), Catefica MM92-P0169 (b). Scale bars = 300 Μm (a, b). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 17. Scanning electron microscope (SEM) images of fruits of Serialis communis (a) and Serialis crassitesta (b); Catefica locality, Portugal. a) Oblique lateral view of fruit showing three laterally coherent seeds from which the fruit wall has been almost completely lost showing the prominent micropylar region; b) Oblique lateral view of fruit containing three or four laterally coherent seeds with their micropylar regions oriented to the left. Specimens, Catefica MM92-P0167 (a), Catefica MM92-P0169 (b). Scale bars = 300 Μm (a, b).
Data for: Quantifying Quantum Coherence in Polariton Condensates
<p>Data for the publication C. Lüders, M. Pukrop, E. Rozas, C. Schneider, S. Höfling, J. Sperling, S. Schumacher, and M. Aßmann, Quantifying Quantum Coherence in Polariton Condensates, PRX Quantum, 2(3), 030320 (2021).</p> <p>We theoretically and experimentally investigate quantum features of an interacting light-matter system from a multidisciplinary perspective, combining approaches from semiconductor physics, quantum optics, and quantum-information science. To this end, we quantify the amount of quantum coherence that results from the quantum superposition of Fock states, constituting a measure of the resourcefulness of the produced state for modern quantum protocols. This notion of quantum coherence from quantum-information theory is distinct from other quantifiers of nonclassicality that have previously been applied to condensed-matter systems. As an archetypal example of a hybrid light-matter interface, we study a polariton condensate and implement a numerical model to predict its properties. Our simulation is confirmed by our proof-of-concept experiment in which we measure and analyze the phase-space distributions of the emitted light. Specifically, we drive a polariton microcavity across the condensation threshold and observe the transition from an incoherent thermal state to a coherent state in the emission, thus confirming the buildup of quantum coherence in the condensate itself.</p> <p>You can use 7-zip for extracting the .7z file. (https://www.7-zip.org/)</p> <p>Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – SFB-Geschäftszeichen TRR142/3-2022 – Projektnummer 231447078, Project A04. A grant for computing time at the Paderborn Center for Parallel Computing (PC<sup>2</sup>) is gratefully acknowledged.</p>
Data for: Tracking quantum coherence in polariton condensates with time-resolved tomography
<p>Data for publication C. Lüders, M. Pukrop, F. Barkhausen, E. Rozas, C. Schneider, S. Höfling, J. Sperling, S. Schumacher, and M. Aßmann, Tracking quantum coherence in polariton condensates with time-resolved tomography, submitted. arXiv preprint arXiv:2209.07129 (2022)</p> <p>Long-term quantum coherence constitutes one of the main challenges when engineering quantum devices. However, easily accessible means to quantify complex decoherence mechanisms are not readily available, nor are sufficiently stable systems. We harness novel phase-space methods - expressed through non-Gaussian convolutions of highly singular Glauber-Sudarshan quasiprobabilities - to dynamically monitor quantum coherence in polariton condensates with significantly enhanced coherence times. Via intensity- and time-resolved reconstructions of such phase-space functions from homodyne detection data, we probe the systems's resourcefulness for quantum information processing up to the nanosecond regime. Our experimental findings are confirmed through numerical simulations for which we develop an approach that renders established algorithms compatible with our methodology. In contrast to commonly applied phase-space functions, our distributions can be directly sampled from measured data, including uncertainties, and yield a simple operational measure of quantum coherence via the distribution's variance in phase. Therefore, we present a broadly applicable framework and a platform to explore time-dependent quantum phenomena and resources.</p> <p>Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – SFB-Geschäftszeichen TRR142/3-2022 – Projektnummer 231447078, Projects A04 and C10. A grant for computing time at the Paderborn Center for Parallel Computing (PC<sup>2</sup>) is gratefully acknowledged.</p> <p> </p> <p> </p> <p>You can use 7-zip for extracting the .7z file. (https://www.7-zip.org/)</p>
Automatic Choroid Vascularity Index Calculation in Optical Coherence Tomography Images with Low Contrast Sclerocho-roidal Junction Using Deep Learning
<p>This project aims to calculate Choroid Vascularity Index (CVI) in optical coherenece tomography (OCT) images, using loss modified U-Net. The method is detailed in "Automatic Choroid Vascularity Index Calculation in Optical Coherence Tomography Images low contrast sclerochoroidal junction Using Deep Learning". The dataset consists of Enhanced-depth imaging optical coherence tomography images from two patient groups.</p> <p>• First dataset is including Raster OCT B-scans from patients with diabetic retinopathy.</p> <p>• Second dataset is including EDI-HD OCT B-scans from patients with pachychoroid spectrum.</p>
Measurements of nearshore waves through coherent arrays of free-drifting wave buoys
<p>Surface gravity wave breaking occurs along coastlines in complex spatial and temporal patterns that significantly impact erosion, scalar transport, and flooding. Numerical models are used to predict these processes, but many models lack sufficient evaluation with observations during storm events. To fill the need for more nearshore wave measurements during extreme conditions, we deployed coherent arrays of small-scale, free-drifting wave buoys named microSWIFTs. The result is a large dataset covering a range of conditions. The microSWIFT is a small wave buoy with a GPS module, and Inertial Measurement Unit (IMU) used to directly measure the buoy's global position, horizontal velocities, rotation rates, accelerations, and heading. We use an Attitude and Heading Reference System (AHRS), 9 degrees-of-freedom Kalman filter to rotate the measured accelerations from the reference frame of the buoy to the Earth reference frame. We then use the corrected accelerations to compute the vertical velocity and sea surface elevation. The measurements were collected over a 27-day field experiment in October 2021 at the US Army Corps of Engineers Field Research Facility in Duck, NC. The microSWIFTs were deployed as a series of coherent arrays. They all sampled simultaneously with a common time reference, leading to a robust spatial and temporal dataset during each deployment. We evaluate wave spectral energy density estimates from individual microSWIFTs by comparing them with a nearby acoustic waves and currents (AWAC) sensor. We also compare significant wave height estimates from the coherent arrays with the nearby AWAC estimates. A zero crossing algorithm is applied to each buoy time series of sea surface elevation to extract realizations of measured surface gravity waves, yielding 116,307 wave realizations throughout the experiment. These measurements spanned offshore significant wave heights ranging from 0.5 meters to 3 meters and peak wave periods ranging from 5 to 15 seconds over the entire experiment. </p>
Data and code associated with the paper 'Measurement-induced collective vibrational quantum coherence under spontaneous Raman scattering in a liquid'
<p>Data and code associated with the following paper <a href="https://doi.org/10.1038/s41467-023-38483-9">V. Vento, S. Tarrago-Velez et al., Nat. Commun. (2023)</a></p> <p>A thorough explanation of the experiment performed is available there.</p> <p>The name of each sub-folder and file in <strong>CS2_data_code.zip</strong> indicates the corresponding figure number ("FIG #") and the type of content ("Data", "Analysis" or "Model").</p> <p> </p>
The Role Of The Intraoperative Optical Coherence Tomography For Vitreoretinal Surgery In A Real-Life Setting
<p>Intraoperative coherence tomography represents a useful tool for managing several eye surgical challenges. Indeed, it provides surgeons with a previously unreachable source of information. The use of OCT revolutionized the diagnosis and treatment of vitreoretinal diseases and is currently an indispensable tool in this field. In this paper, we report our experience using Intraoperative coherence tomography in dealing with vitreoretinal diseases in a real-life setting.</p> <p> </p> <p> </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.