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2,118 results for “Metal”
forging metal anvil simple model
"An anvil is a metalworking tool consisting of a large block of metal (usually forged or cast steel), with a flattened top surface, upon which another object is struck (or "worked")." - wikipedia Source: Objaverse 1.0 / Sketchfab
Supporting data for: A linear response, DFT+U study of trends in the oxygen evolution activity of transition metal rutile dioxides
<p>This directory contains all of the finished calculations required for fully analysis of the paper "A linear response, DFT+U study of trends in the oxygen evolution activity of transition metal rutile dioxides" by Zhongnan Xu, Jan Rossmeisl, and John R Kitchin. To use this repository, download the supporting information file and run the scripts present in either 'supporting-information.pdf' or 'supporting-information.org'.</p> <p>The is the release of the supporting data before the first submission to the first journal.</p>
Globular Cluster Abundances from High-Resolution, Integrated-Light Spectroscopy. II. Expanding the Metallicity Range for Old Clusters and Updated Analysis Techniques
<p>Data from:</p> <p> Globular Cluster Abundances from High-Resolution, Integrated-Light Spectroscopy.<br> II. Expanding the Metallicity Range for Old Clusters and Updated Analysis Techniques (Astrophysical Journal)</p> <p> J. E. Colucci, R. A. Bernstein, A. McWilliam, Observatories of the Carnegie Institution for Science</p> <p>This repository contains reduced globular cluster integrated light echelle spectra in IRAF readable format. <br> NOTE: Spectra are *not* flux calibrated or doppler corrected. Sky/Background emission and absorption lines <br> are present. See reference paper for data reduction details.</p> <p>For each globular cluster:<br> <br> 1. *Approximately* normalized spectra are found in files ending with "ils_normalized.fits." The echelle<br> blaze function normalization was performed with an order by order fit to spectra of a reference G-type star.</p> <p> 2. Unnormalized spectra are found in files ending with "ils.fits." These spectra are not flux calibrated so do not<br> use the count values in each order for science purposes. </p> <p><br> Spectra for the globular clusters NGC 104, NGC 362, NGC 2808, NGC 6093, NGC 6397, NGC 6752 were <br> taken with the DuPont telescope. A reference star spectrum associated with the DuPont data is included : hr914_std.fits</p> <p>Spectra for the globular clusters NGC 6388, NGC 6440, NGC 6441, NGC 6528, NGC 6553 were taken with the <br> MIKE spectrograph on Magellan Clay. A reference star spectrum associated with this data is included: ltt9239_std.fits</p> <p>Spectra for the globular cluster Fornax 3 was taken with the MIKE spectrograph on Magellan Clay on a different run. <br> A reference star spectrum associated with this data is included: hd033771_std.fits</p> <p>This research was supported by an NSF Astronomy and Astrophysics Postdoctoral Fellowship under award AST-1302710.</p>
Empirical Stellar Templates Associated with "An Empirical Template Library of Stellar Spectra for a Wide Range of Spectral Classes, Luminosity Classes, and Metallicities Using SDSS BOSS Spectra"
<p>This is the dataset of empirical stellar templates associated with the publication "An Empirical Template Library of Stellar Spectra for a Wide Range of Spectral Classes, Luminosity Classes, and Metallicities Using SDSS BOSS Spectra", which has been accepted for publication in the Astrophysical Journal Supplements. </p>
Synthesis of Ti3AuC2, Ti3Au2C2 and Ti3IrC2 by noble-metal substitution reaction in Ti3SiC2 for high-temperature-stable ohmic contacts to SiC
<p>Repository data for paper "Synthesis of Ti<sub>3</sub>AuC<sub>2</sub>, Ti<sub>3</sub>Au<sub>2</sub>C<sub>2</sub> and Ti<sub>3</sub>IrC<sub>2</sub> by noble-metal substitution reaction in Ti<sub>3</sub>SiC<sub>2</sub> for high-temperature-stable ohmic contacts to SiC".</p> <p>Detailed information:</p> <p>Data from calculations include relaxed structures, electronic band-structure (selected compounds), electronic density of states and crystal overlap Hamilton population (selected compounds). In addition, spin-orbit coupling used for selected compounds. Data fro each compound are found in separate zip files. Scripts used to extract data are found in tools.zip.</p> <p>EDX-mapping:<br> Fig1d.xlsx</p> <p>XRD data:<br> Fig1h.xlsx, Fig2g.xlsx, FigS3.xlsx, FigS7a.xlsx</p> <p>I/V-measurements:<br> Fig4c.xlsx, FigS7b.xlsx, FigS13.xlsx</p> <p>Electrical resistance:<br> FigS5.xlsx, FigS14.xlsx</p>
Role of Dzyaloshinskii-Moriya interaction for magnetism in transition-metal chains at Pt step edges
<p>PDF images (incorporated data in the pdf files)</p>
The Sonora Substellar Atmosphere Models. IV. Elf Owl: Atmospheric Mixing and Chemical Disequilibrium with Varying Metallicity and C/O Ratios (Y- type Models)
<ul> <li><strong>Overview of V2: "The Sonora Substellar Atmosphere Models. V: A Correction to the Disequilibrium Abundance of CO2 for Sonora Elf Owl"</strong></li> </ul> <p> Version 2 of the Sonora Elf Owl Models updates the CO2 and PH3 abundances and spectra. As described in the Wogan et al. (2024) research note (URL OF NOTE GOES HERE), Version 1 of the models did not apply the CO2 quench approximation properly resulting in predicted CO2 abundances that were too small by several orders of magintude in some cases. Version 2 fixes this mistake, updating CO2 abundances and the emission spectra to reflect the new CO2 abundances. Version 2 also removes all spectra contributions of PH3 because Version 1 consistently contained too much PH3 absorption when compared to JWST data (Veiler et al. 2024, <a href="http://doi.org/10.3847/1538-4357/ad6759" target="_blank" rel="noopener noreferrer">http://doi.org/10.3847/1538-4357/ad6759</a>).</p> <ul> <li><strong>Overview of V1</strong></li> </ul> <p> The Sonora Elf Owl Models is a successor to the <a href="../records/5063476#:~:text=This%20particular%20set%20of%20model,g%20are%200.25%20or%200.5.">Sonora Bobcat</a> and <a href="../records/4450269">Sonora Cholla</a> models. The Sonora Elf Owl model grid includes cloud-free radiative-convective equilibrium model atmospheres with vertical mixing induced disequilibrium chemistry with sub-solar to super-solar atmospheric metallicities and Carbon-to-Oxygen ratio. The atmospheric models have been computed using the open-source radiative-convective equilibrium model <a href="https://natashabatalha.github.io/picaso/">PICASO</a>. The parameters included within this grid are effective temperature (<strong><em>Teff</em></strong>), gravity (<strong><em>log(g)</em></strong>), vertical eddy diffusion coefficient (<strong><em>log(Kzz)</em></strong>), atmospheric metallicity (<strong><em>[M/H]</em></strong>), and Carbon-to-Oxygen ratio (<strong><em>C/O</em></strong>).</p> <p>The ranges and increments of these parameters are described in the published paper.<br><br></p> <ul> <li><strong>Three grids available on three links</strong></li> </ul> <p><strong> The model grid has been presented using three Zenodo repositories. This repository has all the models between Teff of 275 to 550 K (applicable to Y-type objects). The models for Teff between 575 to 1200 K (applicable for T- type objects) are available in the Zenodo DOI :- <a href="../records/10385821">https://zenodo.org/records/10385821</a>. The models for Teff between 1300 to 2400 K (applicable for L- type objects) are available in the Zenodo DOI :- <a href="../records/10385987">https://zenodo.org/records/10385987</a>.</strong></p> <p> </p> <ul> <li><strong> File types and how to use them</strong></li> </ul> <p> The models have been presented in the Xarray format so that all the atmospheric properties including the T(P) profile, atmospheric chemistry, and thermal emission spectra can be accessed within the same files. A python based Jupyter notebook named "Reading and plotting Elf Owl Models.ipynb" has been also supplied which demonstrates how to open and use these files.</p> <ul> <li> <strong>Spectra</strong></li> </ul> <p> The emission spectra for each atmospheric model has been computed between 0.6 to 15 microns. The reported flux is in the units of erg/s/cm<sup>2</sup>/cm. Note that these fluxes need to be multiplied with R<sup>2</sup>/D<sup>2</sup> before comparing them with the typically observed flux of brown dwarfs/exoplanets. R is the radius of the object, and D is the distance here.</p> <div> </div> <div> <ul> <li><strong>Note on CH4</strong></li> </ul> </div> <p> As stated in <a href="https://ui.adsabs.harvard.edu/abs/2023ApJ...942...71M/abstract">Mukherjee et al. 2023 </a>our CH4 opacity is derived using the <a href="https://iopscience.iop.org/article/10.3847/1538-4365/ab7a1a">Hargreaves et al. 2020</a> HITEMP line list and computed using the HAPI code (<a href="https://www.sciencedirect.com/science/article/abs/pii/S0022407315302466">Kochanov et al. 2016</a>). HAPI automatically pre-weights the isotopologues according to earth abundances that are listed on the HITRAN website (<a href="https://hitran.org/lbl/2?6=on" target="_blank" rel="noopener noreferrer">see here for CH4</a>). Therefore, users should note that there will be minor features of CH3D included in the models. Given the general absence of deuterated molecules in brown dwarfs (Teff>~300) we will include a second posting of models which includes the Elf Owl grid with <strong>only</strong> the major CH4 isotopologue (12C-H4).</p> <div> <ul> <li><strong>Note on PH3</strong></li> </ul> </div> <p> PH3 abundance is treated separately from the general disequilibrium scheme. This is because of the current non-detection of PH3 in many brown dwarf atmospheres (see citations in paper). The current PH3 treatment uses the chemical equilibrium treatment described in Visscher et al. However, after publishing this grid and using the model for analysis of high precision JWST data, we noticed that even the simple chemical equilibrium treatment which reduces the abundance, introduces a noticeable PH3 feature. Therefore in our v2 of this model grid we will further diminish the abundance.</p>
The Data For Inside-Out versus Upside-Down: The Origin and Evolution of Metallicity Radial Gradients in FIRE Simulations of Milky Way-mass Galaxies and the Essential Role of Gas Mixing
<p>The files titled Graf et al. 2024b store the x-axis and y-axis values for each line in each figure. The files which end in .py are the scripts which produced the data in the figures.</p> <p>This data abides by CC-BY.</p>
Hydrogen Transport Between Layers of Transition Metal-Dichalcogenides
<p><strong>Abstract</strong></p><p>Hydrogen is a crucial source of green energy and has been extensively studied for its potential usage in fuel cells. The advent of two-dimensional crystals (2DCs) has taken hydrogen research to new heights, enabling it to tunnel through layers of 2DCs or be transported within voids between the layers, as demonstrated in recent experiments by Geim's group. In this study, we investigate how the composition and stacking of transition-metal dichalcogenide (TMDC) layers influence the transport and self-diffusion coefficients (D) of hydrogen atoms using well-tempered metadynamics simulations. Our findings show that modifying either the transition metal or the chalcogen atoms significantly affects the free energy barriers (∆F) and, consequently, the self-diffusion of hydrogen atoms between the 2DC layers. In the H^h_h polytype (2H stacking), MoSe2 exhibits the lowest ∆F, while WS2 has the highest, resulting in the largest D for the former system. Additionally, hydrogen atoms inside the R^M_h (or 3R) polytype encounter more than twice lower energy barriers and, thus, much higher diffusivity compared to those within the most stable H^h_h stacking. These findings are particularly significant when investigating twisted layers or homo- or heterostructures, as different stacking areas may dominate over others, potentially leading to directional transport and interesting materials for ion or atom sieving.</p><p>https://doi.org/10.48550/arXiv.2308.03418</p><p> </p><p><strong>Overview</strong></p><p>This repository contains calculation files, optimized structures, plots, and Excel files for studies of H diffusion within vdW crystals. A general guide is written here and also in the README.txt file. The repository classifies based on material type and each material has a specific README.txt file that contains more detailed information. Calculation towards self-diffusion coefficients for each step of each material follows:<br> </p><ol><li>Cell optimization of the pristine material: To optimize lattice constants and structural parameters.</li><li>Single H atom site tests. To find a favorable H location within vdW crystals to initialize dynamic calculations.</li><li>Molecular dynamics. Pre-optimization of thermal equilibrium before performing metadynamics calculations.</li><li>Well-tempered Metadynamics simulations: to get a free-energy surface and ultimately; to get a ∆F to calculate D.</li><li>The final FES is plotted, and the calculation of the self-diffusion coefficients is noted down in the Excel file.</li></ol><p> </p><p><strong>Acknowledgment</strong></p><p>This research was supported by the Deutsche Forschungsgemeinschaft (projects GRK 2721/1 and SFB 1415). The authors acknowledge the high-performance computing center of ZIH Dresden, the Leipzig University Computing Centre, and the Paderborn Center for Parallel Computing (PC2 ) for computational resources. The authors thank Prof. Thomas Heine for fruitful discussions.</p>
Dataset: The Mononuclear Metal-Binding Site of Mo-Nitrogenase Is Not Required for activity
<p>Dataset for publication: <a href="https://doi.org/10.1021/jacsau.3c00567">https://doi.org/10.1021/jacsau.3c00567</a> </p>
Data from: Reactive high-spin iron(IV)-oxo sites through dioxygen activation in a metal–organic framework
<p>In nature, nonheme iron-containing enzymes use dioxygen to generate high-spin iron(IV)=O species for a variety of oxygenation reactions. Although scientists have long sought to mimic this reactivity, the enzyme-like activation of dioxygen to form high-spin iron(IV)=O species remains an unrealized goal in synthetic chemistry. Here, we report a metal–organic framework featuring iron(II) sites with a local structure similar to that in α-ketoglutarate-dependent dioxygenases. The framework reacts with dioxygen at low temperatures to form high-spin iron(IV)=O species that are characterized using in situ diffuse reflectance infrared Fourier transform, in situ and variable-field Mössbauer, Fe Kβ x-ray emission, and nuclear resonance vibrational spectroscopies. In the presence of dioxygen, the framework is competent for catalytic oxygenation of cyclohexane and the stoichiometric conversion of ethane to ethanol.</p>
Solid-state $^{13}$C-NMR spectroscopic determination of sidechain mobilities in zirconium-based metal-organic frameworks
<p>This Dataset contains the raw data contained in the figures of our journal article in <i>Magnetic Resonance</i>: <a href="https://doi.org/10.5194/mr-2023-13">https://doi.org/10.5194/mr-2023-13</a>.</p>
Data for "Predicting the charge density response in metal electrodes"
<p>Dataset associated with the manuscript "Predicting the charge density response in metal electrodes", as published in https://journals.aps.org/prmaterials/abstract/10.1103/PhysRevMaterials.7.125403.</p>
π-Conjugated Metal Free Porphyrin as Organic Cathode for Aluminum Batteries
<p>A metal-free porphyrin (TDPP) with a diphenylamino-Phenyl group is proposed as an electrode for aluminum-based batteries. The electrochemical performance is explored thoroughly. The extended porphyrin conjugated structure by the diphenylamino-phenyl groups shows a reversible capacity of 83 mAh.g-1 at 1 A. g-1 after 200 cycles and good cycling stability.</p>
Digital research data from: Evaluation of a pH- and time-dependent model for the sorption of heavy metal cations by poultry litter-derived biochar
<p>This is digital research data corresponding to a published manuscript, Evaluation of a pH- and time-dependent model for the sorption of heavy metal cations by poultry litter-derived biochar. Chemosphere (2024), 347, 140688. https://doi.org/10.1016/j.chemosphere.2023.140688. </p> <p>Common isotherm and kinetic models cannot describe the pH-dependent sorption of heavy metal cations by biochar. In this paper, we evaluated a pH-dependent, equilibrium/kinetic model for describing the sorption of cadmium (Cd), copper (Cu), nickel (Ni), lead (Pb), and zinc (Zn) by poultry litter-derived biochar (PLB). We performed sorption experiments across a range of solution pH, initial metal concentration, and reaction time. </p>
Remediation of Metal Oxide Nanotoxicity with A Functional Amyloid
<p>The molecular dynamics simulations on the binding of metal ions with the beta-lactoglobulin (bLg) amyloid fibrils.</p>
Metal battery lamp
Origin: Germany Producer: Friemann & Wolf GmbH Date: 1925 Height: 30.5 cm Diameter: 10.5 com Around 1930, batteries started developing. The petrol lamp was being replaced by battery lamps. They also kept using petrol lamps for the mine gas measurements, but the battery lamp were both safer and created more light. This mine lamp consists of an upper part and a part. In the upper part is the fitting with reflector and light that is protected by a protective glass. The battery is located in the round metal housing - the battery pot - at the bottom of the lamp. Creator: Ruqin Hu Source: Objaverse 1.0 / Sketchfab
Metal Strip for a Surface of Rotation
* It was designed at the mathematical institute of the technical high school in Munich, under the direction of Professor Alexander Brill. This curved brass surface is one of them. It has a constant radius of curvature and fits around model. * Модель имеет изогнутую латунную часть, которая имеет постоянный радиус кривизны и облегает модель. * *(метка Р33)* Source: Objaverse 1.0 / Sketchfab
Simple Medieval Rusty Metal Barrel Low Poly Free
**Simple Medieval Rusty Metal Barrel - Low Poly - Free** Low Poly Metal Barrel from the Medieval Period. PBR Textured in Substance Painter Metalness Workflow used Nice Asset to import into your project/scene Low poly model. Modelled in Blender 2.79 Please note if you are using **EEVEE**: You may need to go into the Render Properties Tab - Performance - **Enable High Quality Normals** This is a **.blend** file Thanks for your interest & support! **MagicCGIStudios** Source: Objaverse 1.0 / Sketchfab
Herschel Speculum metal blank for primary mirror
Model created for manufacturer to reproduce the blank speculum mirror used within the William Herschel 7ft replica telescope. Instead of glass, the mirrors are made from speculum metal which is an mixture of two thirds copper and one third tin. 4 blanks are to be reproduced for the William Herschel Society and ground and polished to a reflective surface. Source: Objaverse 1.0 / Sketchfab
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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.