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488 results for “Ceramics”

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zenodo52/100

Dataset of "A Monte Carlo Approach for Simulating Electrical Conductivity in Highly Porous Ceramic Composites: Impact of Internal Structure"

<p>3D structure of lanthanum strontium manganite and yttria-stabilized zirconia composites is predicted based on conductivity measurements using Monte Carlo 3D equivalent circuit network approach. Validation experimental impedance spectra; scanning electron micrographs; cross sections of model simulation or prediction (MSP).</p>

opencc-by-4.0Mar 2024View details →
edi52/100

Oyster recruitment to standardized ceramic tiles on the Virginia Coast in 2018, 2019, and 2021

This dataset contains measurements of Eastern oyster (Crassostrea virginica) recruitment to standardized ceramic tiles deployed across intertidal oyster reef sites in the Virginia Coast Reserve. Recruitment is defined as the number of macroscopic oyster recruits (less than or equal to 25 mm shell height) per square centimeter of tile surface, capturing settlement and early post-settlement survival. Data were collected in 2018, 2019, and 2021 across 9-16 reef sites per year, including both natural and restored reefs. The dataset supports research on spatial and environmental drivers of oyster recruitment and has been validated against natural reef substrate data for comparability.

openCustomMay 2025View details →
zenodo48/100

Nanostructured La0.75Sr0.25Cr0.5Mn0.5O3–Ce0.8Sm0.2O2 Heterointerfaces as All-Ceramic Functional Layers for Solid Oxide Fuel Cell Applications

<p>Dataset for article &quot;Nanostructured La<sub>0.75</sub>Sr<sub>0.25</sub>Cr<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>3</sub>&ndash;Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>2</sub>&nbsp;Heterointerfaces as All-Ceramic Functional Layers for Solid Oxide Fuel Cell Applications&quot; published in <em>ACS Appl. Mater. Interfaces</em> 2022.</p> <p>The data includes:</p> <ul> <li>Schematic on the nanostructures fabricated for the work (Figure 1)</li> <li>Top view AFM images of&nbsp;the nanostructures studied (Figure 3)</li> <li>TEM-EDX images of&nbsp;the nanostructures studied (Figure 4)</li> <li>ASTAR analysis of the nanostructures studied (Figure 5)</li> <li>X-Ray Diffraction data of thin films with composition:&nbsp;La<sub>0.75</sub>Sr<sub>0.25</sub>Cr<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>3</sub>&nbsp;(LSCrMn),&nbsp;Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>2</sub>&nbsp;(SDC), and two La<sub>0.75</sub>Sr<sub>0.25</sub>Cr<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>3</sub>&ndash;Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>2&nbsp;</sub>(LSCrMn-SDC) nanostructures&nbsp;-bilayer (BL) and nanocomposite (NC)-</li> <li>Electrochemical Impedance Spectroscopy raw data for LSCrMn, SDC and LSCrMn-SDC thin films measured under air and wet hydrogen atmospheres at different temperatures (630-750 &ordm;C)</li> <li>Arrhenius analysis of the area specific resistance (ASR) of the films under air and hydrogen atmospheres</li> <li>In-plane conductivity evolution with temperature data measured under air and 5% hydrogen atmospheres of the two LSCrMn-SDC nanostructures</li> <li>ASR evolution with time measured for over 400 h at 780 &ordm;C</li> </ul>

opencc-by-4.0Sep 2022View details →
zenodo48/100

The Archaeological Ceramics from Mahurjhari: the Fabric Groups

<p>A descriptive and illustrated list of the fabric groups identified and defined during the analysis of archaeological ceramics in the excavated assmeblage from the site at Mahurjhari, excavated by the Deccan College, Pune 2000-2003.</p>

opencc-by-4.0Nov 2019View details →
zenodo48/100

The Archaeological Ceramics from Mahurjhari: Pottery Classes by Stratigraphic Layers

<p>This spreadsheet contains the quantities of each pottery class in each stratigraphic layer of each excavated trench at Mahurjhari, India. The data is arranged according to the excavated trenches. For each trench, the number of sherds and the MNI count are presented.</p>

opencc-by-4.0Nov 2019View details →
zenodo48/100

The Archaeological Ceramics from Mahurjhari: Vessel Forms by Stratigraphic Layer

<p>This spreadsheet contains the quantities of each type of vessel form found in each stratigraphic layer of each excavated trench at Mahurjhari, India. The data is arranged according to the excavated trenches. For each trench, the combined MNI count and number of bases are presented.</p> <p>&nbsp;</p>

opencc-by-4.0Nov 2019View details →
zenodo48/100

Archaeological Ceramics from Mahurjhari: the Vessel Forms

<p>A descriptive and illustrated list of the vessel forms identified and defined during the analysis of archaeological ceramics in the excavated assemblage from the site at Mahurjhari, excavated by the Deccan College, Pune 2000-2003.</p>

opencc-by-4.0Nov 2019View details →
edi48/100

MCR LTER: Coral Reef Resilience: Short-term Accumulation of Algal Biomass on Unglazed Ceramic Tiles from July 2010-August 2011

Caged tiles were placed at various sites to measure short-term algal accumulation in the absence of grazing by fishes or large invertebrates. These data document biomass of algae that accumulated on unglazed ceramic tiles (2.5 cm X 2.5 cm) placed inside cages (mesh size = 2.5 cm x 2.5 cm) at various sites around the island of Moorea for a period of 3 to 4 weeks. Three separate experiments were conducted (one during July-August 2010 and two in July-August 2011). In the first experiment (2010_Production), we measured the accumulation of algae after 24 days at two different depths on the forereef (10 and 17 m), and within the lagoon at four different distances from the reef crest (approximately 25, 100, 400, and 700 m). In the second experiment (2011_Production_Summary), we measured the accumulation of algae after 24 or 25 days at six forereef sites (LTER 1, Resilience 2, LTER 3, LTER 4, LTER 5, LTER 6). In this experiment, tiles were placed adjacent to the fish transects (see knb-lter-mcr.6) at a depth of 12 m. In the final experiment (Production_Time_Series), we measured the accumulation of algae on tiles at three day intervals over a period of 31 days. This experiment was conducted at Resilience 2. This material is based upon work supported by the U.S. National Science Foundation under Grant No. OCE 16-37396 (and earlier awards) as well as a generous gift from the Gordon and Betty Moore Foundation. Research was completed under permits issued by the French Polynesian Government (Délégation à la Recherche) and the Haut-commissariat de la République en Polynésie Francaise (DTRT) (Protocole d'Accueil 2005-2018). This work represents a contribution of the Moorea Coral Reef (MCR) LTER Site.

openCC (other)May 2012View details →
zenodo44/100

Archaeological Ceramics from Vidarbha: The Vessel Forms

<p>A descriptive and illustrated list of the vessel forms identified and defined during the analysis of archaeological ceramics collected during archaeological surveys of Vidarbha in 2016.</p>

opencc-by-4.0Jul 2020View details →
zenodo44/100

Water Body Checklists 2019: Ceram Sea Species List

Species checklists created using effechecka and modified polygons from IHO. The polygons were reduced in resolution.<p></p>List of species collected from the Ceram Sea using effechecka and a modified polygon from the International Hydrographic Association. A filter was applied (based on data from WoRMS) to remove all non-marine taxa.

opencc-by-4.0Aug 2024View details →
zenodo44/100

MicroCT slices of reproductions of Minoan ceramic cups

<p>MicroCT data have been acquired at the Multidisciplinary Laboratory of the Abdus Salam International Centre for Theoretical Physics. The microCT scans were carried out by using a sealed X-ray source (Hamamatsu L8121&ndash;03) with a focal spot size of 5 &mu;m and a flat panel detector (Hamamatsu C7942SK-25; pixel size of 50&mu;m) according to the following parameters: 110kV, 90&mu;A, exposure time/projection of 2 s, 1440 projections of the samples over 360&deg;. The X-ray beam was filtered by a 0.01 mm-thick copper absorber. The final slices were reconstructed using the commercial software DigiXCT (Digisens) in 32-bit format at an isotropic voxel size of 40 &mu;m. The uploaded slices have been converted in 8-bit format.</p>

opencc-by-sa-4.0Jul 2024View details →
zenodo44/100

Water Body Checklists: Ceram Sea Species List

Species checklists created using effechecka and modified polygons from IHO. The polygons were reduced in resolution.<p></p>List of species collected from the Ceram Sea using effechecka and a modified polygon from the International Hydrographic Association. A filter was applied (based on data from WoRMS) to remove all non-marine taxa.

opencc-zeroAug 2024View details →
zenodo44/100

Set of images published in publication "Cleaning strategies for 3D-printed porous scaffolds used for bone regeneration fabricated via ceramic vat photopolymerization"

<p>Figures of publication "Cleaning strategies for 3D-printed porous scaffolds used for bone regeneration fabricated via ceramic vat photopolymerization".</p> <p><a title="Persistent link using digital object identifier" href="https://doi.org/10.1016/j.ceramint.2024.10.160" target="_blank" rel="noreferrer noopener"><span><span>https://doi.org/10.1016/j.ceramint.2024.10.160</span></span></a></p>

opencc-by-4.0Oct 2024View details →
zenodo44/100

Broad luminescence generated by IR laser excitation from CsPbBr3:Yb3+ perovskite ceramics

<p><strong>Abstract</strong></p> <p>This paper demonstrates the generation of broadband emission in the visible and infrared ranges induced by a concentrated beam of infrared radiation from CsPbBr3 ceramics doped with Yb3+ ions. The sample was obtained by the conventional solid-state reaction method, and XRD measurements confirmed the phase purity of the material crystallizing in the orthorhombic system. Spectroscopic measurements required further sample preparation in the form of ceramics using a high-pressure press. The research showed that as the excitation power increases, the emission intensity does not increase linearly from the beginning of the experiment. Irradiation of the material results in the accumulation of the delivered energy. Absorption of a sufficient number of photons triggers avalanche emission. It was found that the most intense luminescence is produced in a vacuum. Changes in conductivity were also observed, where the excitation was able to lower the resistivity of the material and it was highly dependent on the excitation power. The mechanism responsible for the generation of the observed phenomenon involving intervalence charge transfer (IVCT) transitions has been postulated.</p>

opencc-by-4.0Jun 2023View details →
zenodo40/100

Weight data for ceramic finds from the Byzantine Quarter in Gortys, Crete

<p>This dataset consists of one table in CSV format.</p> <p>Each record corresponds to a single ceramic sherd for which weight in grams was measured and recorded together with the stratigraphical context of provenance and a broad category label. All contexts are from the excavation in the Byzantine Quarter near the temple of Apollo Pythios in Gortys, Crete, and are dated to the Late Roman and Early Byzantine period (4th-8th century).</p> <p>A total of 25 contexts is included in the dataset, recorded in the years 2012-2014 during fieldwork seasons.</p> <p>Column descriptions:</p> <ul> <li>Weight: weight in grams, recorded with a common electronic kitchen scale capable of measuring 7000&plusmn;1 g and a minimum of 2 g;</li> <li>Category: a generic label describing the category of ceramic find ‒ most should be self-explaining apart from &ldquo;Sovradipinta&rdquo;, a semi-fine painted ware locally produced in Gortys, basically identical to the plain wares. For some records the &ldquo;Category&rdquo; field is empty (for reasons of time constraints in the fieldwork season) and should be treated as NA;</li> <li>Context: a numeric identifier for the stratigraphic context of provenance.</li> <li>Measured by: initials of operator who performed the weighing (Stefano Costa, Elisa Triolo, Enrico Zanini, Andrea Bellotti);</li> <li>Notes: notes.</li> </ul>

opencc-zeroAug 2014View details →
zenodo40/100

Data of the publication: Nuclear spin coherence properties of 151Eu3+ and 153Eu3+ in a Y2O3 transparent ceramic by J. Karlsson et al.

<p>Data corresponding to the figures of the publication "Nuclear spin coherence properties of 151Eu3+ and 153Eu3+ in a Y2O3 transparent ceramic" by J. Karlsson et al., (https://doi.org/10.1088/1361-648X/aa529a). A text file describes data in each compressed folder, please refer to the caption in the publication for more details. </p>

opencc-by-4.0Apr 2017View details →
zenodo40/100

Metal on Ceramic Friction Surfacing Data for Printing Electronics

<p>This repository is for data for an upcoming paper that presents work using micro friction surfacing for applying in-situ maskless metallizations and robust seed layers for electroless plating on demand to substrates like, aluminum oxide, aluminum nitride, and as fired LTCC, for fabrication of next generation power module and other high reliability electronic substrates.&nbsp;</p> <p>An adjoining youtube playlist, with unique video identifiers that correspond to data in the provided excel data sheets,&nbsp; of all raw video footage of the friction surfacing process can be found <a title="Metal on Ceramic Friction Surfacing playlist" href="https://youtube.com/playlist?list=PLxlbqMdRe6OVbtT3ehHzCJgsyfsY8-2mJ&amp;si=QhrZ0YftJCpKQ3uq" target="_blank" rel="noopener">here:</a><br><br></p> <p>New generation power modules provide compact form factors while achieving multi kilovolt drive potentials at kiloamp currents.[1] However, their typical packaging and substrate metallization methods, such as thick film, direct bond copper, and active metal braze, limits attachment options and other manufacturing process requirements while incurring large processing costs and extended lead times for researchers and industry.[2]&ndash;[5] High speed micro friction surfacing allows for directly writing pure metal conductors and integrated passives, onto common insulating high reliability electronics substrates, supports additional layers of metallization and provides direct device interconnect before or after die fabrication and bonding, without bulk thermal annealing and without damaging the underlying substrate. Thus, making the next generation of power devices more tenable at the prototype level, and with further process refinements, at industrial scale.[6]&ndash;[13] This work highlights the importance of rapid and flexible prototyping for next generation power modules and high reliability electronics, and how finding new ways to use existing tooling can enhance fabrication options and potentially shore up semiconductor prototyping supply chain stability</p> <h2>1. Introduction</h2> <p>Current generation power modules and high-reliability electronics require rapid and flexible prototyping, but current fabrication methods using thin and thick film, ultrasonic soldering, direct oxide bonding and active metal brazing, have limitations due to exotic interface metallization, atmosphere control, and thermal cycling requirements during fabrication and deployment [2], [3], [5]. These limitations particularly apply to silicon carbide devices, where typical wire bondable aluminum, active metal brazed gold-titanium and direct bond copper substrate metallization schemes incur large fabrication costs and lead times while inhibiting rework of as fabricated substrates due to deep vacuum/ high temperature requirements and a substantial need for skilled manual labor [14], [15].&nbsp;</p> <p>In this work, High Speed Micro-Friction Surfacing(HSMFS) is used to metallize substrates of aluminum oxide, aluminum nitride, and as fired LTCC, with millimetric to sub-millimeter, traces made of, copper, and gold. HSMFS enables relatively automated, single step fabrication of single layer electronic circuits with bond strengths that exceed thin and thick film methods and ultrasonic soldering, at a cost and lead time 20-50X less, without need for skilled labor. HSMFS is a downscaled extension of a broader class of methods known as "friction surfacing" wherein a rod or powder of a material to be coated onto a substrate, is stirred by rotating a tool, or "mechtrode" against the substrate, trapping the material to be deposited between the mechtrode and substrate surfaces.[1]&ndash;[3] The mechtrode can be either a wire of material that is consumed as deposition proceeds, or a non-consumable tool made of a hard material that resists wear during deposition. Heat is generated due to friction between mechtrode and substrate, and forging pressure is applied from a CNC motion platform. The combination of heat from friction, mechano-chemical activation, and forging pressure induced plastic deformation results in the shearing, viscoplastic flow and chemical and mechanical bonding of material from the mechtrode to the substrate being coated.&nbsp;</p> <p>While there have been previous examples of friction surfacing metals onto ceramic substrates[4], [5], none have been used in electronics applications, and no characterization of relevant electro-thermal properties and endurance has been carried out. Additionally, the typically centimeter or larger deposit size scale of the mechtrode and consequently large supporting machinery in previous work has meant that the technique would be unsuitable for fabricating modern electronics. This large mechtrode scale results in excessive, evolved heat at the interface and thus high probability of heat shock damage to ceramic materials. Further, the relatively low mechtrode rotational speeds used in most prior works, results in very high forging pressures (hundreds of MPa), which typically far exceed the fracture toughness of common ceramic substrates. We have overcome these limitations and managed to obtain near bulk metallic electronic properties in as deposited track widths as small as 0.5mm, and metallization thicknesses from nanometers to 10's of microns on frangible substrates without damaging the substrate or compromising its electro-thermo-mechanical endurance.&nbsp;</p> <h2>2. Materials and Methods</h2> <p>&nbsp;</p> <h2>2.1 Materials and tools</h2> <p>For this study the raw materials used to produce the printed prototype as fired circuits were provided by Tommy's Watch and Jewelry via Stuller Precious Metals, (1.6mm copper, #43-6421:100000:T and 0.6mm gold wire, #WIRE:9698:P) and The University of Arkansas High Density Electronics Center (HiDEC), (Dupont 1mm thick 951 LTCC, Stellar Industries 0.5mm thick 99% aluminum nitride, and 0.5mm thick 96% alumina ceramics).&nbsp;</p> <p>The process parameters for printing tracks of copper and gold on the three substrates of interest were explored using a genmitsu 1610 minimill with a Dremel "multipro" 30,000 RPM rotary tool as it's spindle, and a 26 gauge 1070 spring steel sheet covering the mill bed between the aluminum t-slotbed and the ceramic substrate being printed on, purchased on amazon. Each substrated was held in place with a set of binder clips to keep it firmly in position nad flat against the spring steel sheet during deposition.&nbsp; Each deposition process was recorded in thermal video(Flir-T300) (courtesy of Dr. Darin Nutter) with a microscope camera(Opti-Tekscope OT-HD) and in real time macro video (Nikon D750). Subsequent profilometry (Dektak3030) electrical resistance (Fluke 77), current handling testing, taklife and ACS723 current sensor, and Flir-T300 camera (courtesy of Dr. Darin Nutter), and film strength (Kapton pull tests) measurements were performed with tooling available at HiDEC.&nbsp;<br>Temperature data were extraced via optical character recognition using the script here:<br>https://github.com/mahydraal/OCRDataExtractor<br>it deploys tesseract OCR and relatively simple python script with tkinter to provide a graphical user interface to select a region of a video, scrub it for noise, convert it to black and white, and then read character data from the user selected region.&nbsp;</p> <h2>2.2 Determination of printing parameters</h2> <p>Metals, copper and gold, were deposited on substrates of 96% alumina, 99% aluminum nitride(Al-N) and fired 951 LTCC, from wires of 1.6mm and 0.6mm OD respectively, via high speed micro friction surfacing (HSMFS). Spindle RPM was set open-loop constant to 30K RPM, and surface feed velocity was varied between 15, 45 and 75 mm/minute at a constant ratio of X-Z feed distance of 80 to approximate a constant normal force at the stall torque of the Z axis motor of the motion frame in open loop mode. Each surface feed velocity set point was tested 3 times for each metal substrate combination. &nbsp;Each metal and substrate combination were cleaned with 90% IPA and 90% Acetone and Di rinsed then blown dry with nitrogen before deposition.</p> <p>Friction surfacing is a solid-state joining process that involves rubbing two surfaces together at high speeds under pressure, creating a bond between the two surfaces without melting them, stereotypically shown in figure. The process can be used to join similar or dissimilar metals and alloys, metals and ceramics, and organics, and is particularly useful for joining materials with high melting points, such as titanium and nickel-based alloys without obtaining fusion and melting temperatures and without protective atmosphere. This process generates significant waste heat from friction and plastic deformation, which is useful for monitoring and controlling deposition consistency, thus real time thermographic videos during each test were collected using a FLIR T-300 thermal camera, and optical character recognition on it's display to obtain insight into the deposition temperature trends at the substrate-feedstock interface and better tune the surface feed-velocity at constant RPM to obtain electronic continuity in the as deposited metallic tracks on each ceramic substrate type. Real time macro videography was performed on each test to provide post-facto analysis and record any anomalies that would not be representative of typical performance.&nbsp;</p> <p>An appropriate spindle speed for deposition must be selected as well as appropriate vertical and linear feeds and speeds for the mini mill in micro friction surfacing.&nbsp; This is generally due to the need for a specific surface energy threshold associated with frictional heating and mechanical surface activation to be obtained between the feedstock and the substrate. This surface energy must exceed the free energy of reaction for diffusion and bonding to occur between the atoms of the substrate and those of the feedstock. A list of energies of formation for various transition metal carbides and oxides, necessary for bonding of metals to carbide and nitride sub-states by friction surfacing is shown.&nbsp;</p> <p>In short, by controlling spindle speed surface feed rate, and providing a constant down force by constant Z-X feed rate ratio on the minimill, it is possible to set a constant rate of heat evolved at the friction interface between the feedstock and substrate. If this heat evolved exceeds the heat of formation of a bonding compound of interest for long enough, the reaction of interest can proceed and a tenacious bond between metal and substrate can form. The details of accurately modeling heat evolved in friction surfacing, given the details of a specific deposition system and feed stock geometry are elucidated well elsewhere, [29], [30] so we will not go into them here. The primary point being that one can approximate appropriate deposition parameters for almost any material combination, knowing the free energy of formation of an appropriate bonding phase, and or the pressure-temperature phase diagram for the material pair of interest.</p> <h2>2.3 Characterization and measurement of test films</h2> <p>Bond strength of the HSMFS deposited films of copper and gold were tested initially by simple kapton tape pull testing, thereby assigning a minimum failure stress on film bond strengths. Temperature trends recorded during the deposition via thermography were correlated with resultant film resistivities and average height profiles and cycling performance for each set of parameters, each metal and each substrate; the most consistent and robust parametrization results were used in subsequent experiments to fabricate basic current carrying tracks with a mix of soldered and wire bonded terminals to demonstrate feasibility of HSMFS for rapid prototyping of electronics.&nbsp;</p> <h3>2.3.1 Electrical resistivity extraction and profilometry</h3> <p>Each material deposition was followed by profilometry (Dektak3030) at 3 points along each track, averaging the resultant maximum heights to determine film thickness and calculate sheet resistivity from resistance measurements on the multimeter(Fluke 77).</p> <h3>2.3.2 Maximum ampacity testing</h3> <p>Each printed specimen was terminated with copper tape, and soldered/wire bonded respectively. A taklife DC benchtop power supply was used to supply DC 31 volt power at up to 11 amps of current. An Arduino and high current shunt resistor current sensor measured the current flowing through the printed track, and acted to provide automatic control of current ramp up time. The current through the printed track was stepped up by the Arduino in steps of 25 milliamps every 60 seconds to provide time for thermal equilibration and avoid substrate fracture. This process continued until the track failed due to shorting, thermal breakdown, or electromigration failure.&nbsp;</p>

opengpl-3.0-or-laterDec 2023View details →
zenodo40/100

Mock Ceramics Dataset

<p>This is an adaptation of SQLite and CSV files from the&nbsp;Portal Project Teaching Database, and of&nbsp;&#39;portal_data_joined.csv&#39; created by Marco Chiapello.&nbsp;The data has been modified with mock values to represent data about ceramics, for use in a Data Carpentry course to teach R to Archaeologists. The data is not real and may not make sense!</p> <p><strong>Portal Project Teaching Database</strong></p> <p>Ernest, Morgan; Brown, James; Valone, Thomas; White, Ethan P. (2018): Portal Project Teaching Database. figshare. Dataset. https://doi.org/10.6084/m9.figshare.1314459.v10</p> <p><strong>portal_data_joined.csv</strong></p> <p>Chiapello, Marco (2020): Datasets. figshare. Dataset. https://doi.org/10.6084/m9.figshare.8336996.v1</p> <p>&nbsp;</p>

opencc-by-4.0Apr 2022View details →
zenodo40/100

Dataset of measurements of BT-11BS ceramics

<p>Data files for the manuscript "Optical and electrical performance of translucent BaTiO3-BaSnO3 ceramics"&nbsp;</p> <p>Measured data for manuscript figures and tables - more detailed information in README.txt file in the core folder.</p>

opencc-by-4.0Jan 2024View details →
zenodo40/100

pXRF analysis of medieval and modern ceramics from Erbray (France)

<p>This dataset contains analyses of 60 ceramic samples from Les Landelles (Erbray, Loire-Atlantique, France). The chemical composition of the samples was obtained by portable X-ray fluorescence spectrometry (pXRF).</p> <p><strong>Method</strong></p> <p>The outer surfaces of all the samples were mechanically removed prior to analysis.</p> <p>The samples were heated to 950&deg;C for one hour after 24h drying at 50&deg;C, weighted for LOI calculation and ground in a tungsten carbide mortar. Measurements were made on pelletized powders.</p> <p>Measurements were carried out on powders placed in sample holders, through a Mylar film.</p> <p>A Vanta VCR C-series portable X-ray fluorescence spectrometer (Olympus) was used on a laboratory bench with a beam diameter of 10 mm. The spectrometer is equipped with a 4W, 40kV max, 200 &micro;A max X-ray tube (Rh anode) and a silicon drift detector (SDD). For each analysis, the instrument was operated alternately at low energy (10 keV) for 90 s to quantify light elements and at high energy (40 keV) for 90 s to quantify heavy elements. No vacuum or helium flow was used. Analytical repeatability, accuracy and precision were checked using an in-house obsidian standard.</p> <p>Using the GeoChem internal calibration, 15 elements were quantified: Al, Si, K, Ca, Ti, Cr, Mn, Fe, Ni, Cu, Zn, Rb, Sr, Zr, Pb.</p> <p>The files beamspectra.csv and chemistry.csv are the export files as produced by the instrument.</p> <p>The file erbray.csv contains all chemical compositions (only chemical elements for which measurements are considered reliable are retained), with the following columns:</p> <ul> <li><em>sample</em>: sample reference.</li> <li><em>laboratory</em>: analysis laboratory.</li> <li><em>date</em>: date of the analysis.</li> <li><em>group</em>: technical group.</li> <li><em>material</em>: type of material.</li> <li><em>stratigraphy</em>: stratigraphic unit.</li> <li><em>comments</em>: extra information.</li> <li><em>LOI</em>: loss on ignition (percent).</li> <li><em>Al, Si, K, Ca, Ti, Cr, Fe, Rb, Sr, Zr, Pb</em>: amounts and corresponding uncertainties (ppm).</li> </ul>

opencc-by-4.0Jun 2024View details →

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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.

allen-brain-atlas
neuroscienceopenDocumentation, web resources, and API references are available online.
Last verified 2026-04-30Open record

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.

abode-home-cage
behavioral-neuroscienceopenThe DataShare record exposes download links for annotations, documentation, license text, and the zipped per-snippet data directory.
Last verified 2026-04-30Open record

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.

dandi-nwb
electrophysiologyopenPublished Dandiset metadata and archive endpoints are available through the production DANDI API.
Last verified 2026-04-30Open record

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.

ibl
behavioral-neuroscienceopenPublic sessions can be searched and loaded from the IBL public data server through ONE.
Last verified 2026-04-29Open record

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.

openneuro
neuroscienceopenPublished datasets are available on demand over the internet.
Last verified 2026-04-29Open record