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865 results for “beds”
Basal force fluctuations and granular rheology: Linking macroscopic descriptions of granular flows to bed forces with implications for monitoring signals
<p>Herein lies user defined functions, submission scripts, and intitial particle data necessary to build a discrete element solver (using MFiX-DEM version 21.1.1: https://mfix.netl.doe.gov/products/mfix/) and run a monodisperse pure granular flow with 5mm beads in a shear cell configuration. Contained within this dataset are particle velocity and force data for the entire collection of particles ('VELOCITY<em>'* </em>and 'FORCES*.DAT', respectively). This dataset also contains particle-force data recorded at the bottom force plate, writen at 10 kHz. Two MATLAB scripts are included for post processing the force plate data. </p>
Seasonal particle responses to near-bed shear stress in a shallow, wave- and current-driven environment
<p>Novel analysis of in-situ acoustic and optical data collected in a shallow, wave- and current-driven environment enabled determination of: (1) particle characteristics that were most affected by near-bed physical forcing over seasonal scales, and (2) characteristic shear stress, t<sub>char</sub>, at which the rate of change to particle characteristics was most pronounced. Near-bed forcing and particle responses varied by season. Results indicated that moderate t<sub>char</sub> values of 0.125 Pa drove changes in particle composition during summer. In winter, particle concentration effects were most affected at t<sub>char</sub> of 0.05 Pa, suggesting dominance of fluff layer resuspension. Changes to particle size were most relevant during a biologically productive springtime period, with initiation of particle disaggregation occurring most commonly at t<sub>char</sub> of 0.25 Pa. These results suggest that it may be more important to parameterize t<sub>char</sub>, as opposed to critical shear stress for erosion, for sediment transport models.</p>
Data related to "Near-bed sediment transport during offshore bar migration in large-scale experiments"
<p>Abstract: </p> <p>This paper presents novel insights into hydrodynamics and sediment fluxes in large-scale laboratory experiments with bi-chromatic wave groups on a relatively steep initial slope (1:15). An Acoustic Concentration and Velocity Profiler provided detailed information of velocity and sand concentration near the bed from shoaling up to the outer breaking zone including suspended sediment and sheet flow transport. The morphological evolution was characterized by offshore migration of the outer breaker bar. Decomposition of the total net transport revealed a balance of onshore-directed, short wave-related and offshore-directed, current-related net transport. The short wave-related transport mainly occurred as bedload over small vertical extents. It was linked to characteristic intrawave sheet flow layer expansions during short wave crests. The current-related transport rate featured lower maximum flux magnitudes but occurred over larger vertical extents. As a result, it was larger than the short wave-related transport rate in all but one cross-shore position, driving the bar's offshore migration. Net flux magnitudes of the infragravity component were comparatively low but played a non-negligible role for total net transport rate in certain cross-shore positions. Net infragravity flux profiles sometimes featured opposing directions over the vertical. The fluxes were linked to a standing infragravity wave pattern and to the correlation of the short wave envelope, controlling suspension, with the infragravity wave velocity.</p> <p>About the data:</p> <p>The data on beach profile (from mechanical profiler), velocity (from ACVP and ADV), sand concentration (from ACVP and OBS) and water surface elevation (from RWG, AWG and PT) measurements is given in .mat (MATLAB) files.</p> <p>The folder “Beach Profiles” contains the measurements from the mechanical profiler before and after each test. To save time, only the morphologically active section of the profiles was measured. Additionally, the folder contains the initial profiles at the start of a sequence (after application of the benchmark waves). Here the full profile was measured.</p> <p>The structure “MobFrame” contains the absolute cross-shore position of the mobile frame (from which detailed measurements were taken) in the considered tests.</p> <p>The folder “ACVP” contains structures with ensemble-averaged velocity and concentration measurements in vertical reference to the undisturbed bed level or a few bins below it (zeta0-coordinate system) sampled at 50.5051Hz. For better interpretation of the measurements, it also features the ensemble-averaged intrawave instantaneous erosion depth (bed elevation) and the upper limit of the sheet flow layer.</p> <p>The folder “ADV” contains structures with the ensemble-averaged ADV data of each test sampled at 100Hz. Apart from the velocity components of each ADV it contains the vertical elevation of each ADV with respect to the ACVP transceiver. The ADV measurements were not subject to the same vertical referencing procedure that was described in the paper for the near-bed ACVP measurements and a more or less constant distance to the bed was assumed.</p> <p>The folder “OBS” contains structures with the ensemble-averaged OBS data of each test sampled at 40Hz. Apart from the concentration measurements it contains the vertical elevation of the OBSs with respect to the ACVP transceiver.</p> <p>The folder “ETA” contains structures with the ensemble-averaged water surface elevation measurements in many different absolute cross-shore locations in the flume sampled at 40Hz.</p> <p>For visualizing the near-bed concentration data, which may not be as trivial as visualizing the rest of the data, an example of MATLAB code is given:</p> <p>%S=ACVP_xx; %to choose which ACVP file you want to look into<br> con=S.c;<br> con(con<1)=1; %to cater for the cells where the logarithm is not defined<br> xphase=linspace(0,1,length(S.solbed)).*ones(size(S.c,2),size(S.c,1));<br> figure; hold on; box on; <br> [C,h]=contourf(xphase,S.z,log10(transpose(con)),[0:0.1:3]); <br> cbh=colorbar; caxis([0 3]); <br> set(h,'edgecolor','none'); <br> tt=get(cbh,'Title'); set(tt,'String','$^{10}log(c)$ $[kg/m^3]$','Interpreter','Latex');<br> plot(xphase(1,:),S.solbed,'k','Linewidth',1.5);<br> plot(xphase(1,:),S.solflo,'r','Linewidth',1.5);<br> xlabel('$t/T_r$','Interpreter','Latex')<br> ylabel('$\zeta_0$ $[m]$','Interpreter','Latex')<br> set(gca,'Fontsize',18)</p> <p> </p> <p> </p>
FIGURE. Taphonomic process corresponding to the abundance of different kinds of plant remains in the three layers of "vegetational Pompeii" tuff bed. Single, double and triple repeated icons in different layers indicate rare, moderate and frequent occurrence respectively. Note that the thickness of the tuff bed is scaled but that of the two coal beds is neglected. in Discovery of coprolites in an Early Permian fern mesophyll
FIGURE. Taphonomic process corresponding to the abundance of different kinds of plant remains in the three layers of "vegetational Pompeii" tuff bed. Single, double and triple repeated icons in different layers indicate rare, moderate and frequent occurrence respectively. Note that the thickness of the tuff bed is scaled but that of the two coal beds is neglected.
ROADMAP bed files binning by bedtools
<p>Roadmap ChIP-Seq data </p>
Data related to "Near-bed sediment transport processes during onshore bar migration in large-scale experiments. Comparison with offshore bar migration."
<p>Abstract:</p> <p>This paper presents novel insights into nearshore sediment transport processes during bar migration on the basis of large-scale laboratory experiments with bichromatic wave groups on a relatively steep initial beach slope (1:15). Insights are based on detailed measurements of velocity and sand concentration near the bed from shoaling up to the outer breaking zone including suspended sediment and sheet flow transport. The analysis focuses on onshore migration under an accretive wave condition but comparison to an erosive condition highlights important differences. Decomposition shows that total net transport mainly results from a balance of short wave-related, bedload net onshore transport and current-related, suspended net offshore transport. When comparing the accretive to the more energetic erosive condition, the balance shifts towards net onshore transport, and onshore migration, because the short wave-related transport does not decrease as much as the current-related transport. This is related to the effects of skewness and asymmetry combined with larger sediment entrainment and undertow magnitude under the erosive condition. Net transports from streaming in the wave boundary layer and from infragravity waves are noticeable but only play a subordinate role. Identified priorities for numerical model development include parametrization of wave nonlinearity effects and better description of wave breaking and its influences on sediment suspension. The present data, unique in their combination of high measurement detail with fully-evolving accretive beach profiles, help to improve numerical modeling of long-term morphological evolution.</p> <p>About the data:</p> <p>The folder “Beach Profiles” contains the measurements from the mechanical profiler before and after each test. To save time, only the morphologically active section of the profiles was measured. Additionally, the folder contains the initial profiles at the start of each sequence (after application of the benchmark waves). Here the full profile was measured.</p> <p>The structure “MobFrame” contains the absolute cross-shore position of the mobile frame (from which detailed measurements were taken) in the considered tests.</p> <p>The folder “ACVP” contains structures with ensemble-averaged velocity and concentration measurements in vertical reference to the undisturbed bed level or a few bins below it (zeta<sub>0</sub>-coordinate system as described in the paper). For better interpretation of the measurements, it also features the ensemble-averaged intrawave instantaneous bed elevation (erosion depth) and the upper limit of the sheet flow layer.</p> <p>The folder “ADV” contains structures with the ensemble-averaged ADV data of each test. Apart from the velocity components of each ADV they contain the vertical elevation of each ADV with respect to the ACVP transceiver. The ADV measurements were not subject to the same vertical referencing procedure that was described in the paper for the near-bed ACVP measurements.</p> <p>The folder “OBS” contains structures with the ensemble-averaged OBS data of each test. Apart from the concentration measurements in each OBS sensor they contain the vertical elevation of each OBS with respect to the ACVP transceiver.</p> <p>The folder “ETA” contains structures with the ensemble-averaged surface elevation data of each test (from different instruments as described in the paper). The location of each instrument is given in absolute cross-shore coordinates x.</p> <p> </p> <p>For visualizing the near-bed concentration data, which may not be as trivial as visualizing the rest of the data, an example of MATLAB code is given:</p> <p>%S=ACVP_xx; %to choose which ACVP file you want to look into</p> <p>con=S.c;</p> <p>con(con<1)=1; %to cater for the cells where the logarithm is not defined</p> <p>xphase=linspace(0,1,length(S.solbed)).*ones(size(S.c,2),size(S.c,1));</p> <p>figure; hold on; box on;</p> <p>[C,h]=contourf(xphase,S.z,log10(transpose(con)),[0:0.1:3]);</p> <p>cbh=colorbar; caxis([0 3]);</p> <p>set(h,'edgecolor','none');</p> <p>tt=get(cbh,'Title'); set(tt,'String','$log_{10}(c)$ $[kg/m^3]$','Interpreter','Latex');</p> <p>plot(xphase(1,:),S.solbed,'k','Linewidth',1.5);</p> <p>plot(xphase(1,:),S.solflo,'r','Linewidth',1.5);</p> <p>xlabel('$t/T_r$','Interpreter','Latex')</p> <p>ylabel('$\zeta_0$ $[m]$','Interpreter','Latex')</p> <p>set(gca,'Fontsize',18)</p>
FIGURE 1 in A peculiar new genus of Scytinopteridae (Hemiptera, Cicadomorpha) from the Permian-Triassic boundary beds of Mongolia
FIGURE 1. Beloscyta edi gen. et sp. nov., A–F, Holotype tegmen, A–D, SEM (BSE), E, Photograph, A, D, E, Part (images flipped), B, C, Counterpart. A, E, Whole tegmen. B, Base. C, Surface sculpture. D, Apex. F, Venation. G, Paratype (photograph). Scale bars = 1 mm (A, E–G), 0.4 mm (B), 0.2 mm (C, D).
Data used in paper "The sensitivity of tidal channel systems under the influences of initial bed conditions, vegetation, and tidal asymmetry".
<p>Data used in paper "The sensitivity of tidal channel systems under the influences of initial bed conditions, vegetation, and tidal asymmetry".</p>
Funeral bed applique, Tarraco (Tarragona, Spain)
Decorative funeral bed applique from the site of Tarraco (Tarragona, Spain), dated between the 2nd and 3rd centuries AD. Decorative applique of burial owl, of bone, figured with the representation of the god Pan, hollow inside and cylindrical surface. Photos completely processed in Reality Capture. The project was done with the support of the National Archaeological Museum of Tarragona and the Agència Catalana del Patrimoni Cultural. Catalog No. MNAT 46506. Museu Nacional Arqueològic de Tarragona (2019): Tarraco: Exposición de síntesis. Generalitat de Catalunya Publicacions. Source: Objaverse 1.0 / Sketchfab
Bed
Bed for a cell in a Sheriff's office. Source: Objaverse 1.0 / Sketchfab
Osiris Death Bed from Abydos
The god Osiris lying on his death and resurection bed. Discovered by Amélineau in the late 19th century in the tomb of First Dynasty Pharaoh Djer in the royal cemetery at Abydos known as Umm el-Qa'ab. This tomb while originally dated to the First Dynasty, later becomes attributed as the tomb of Osiris. It has been suggested that the sculpture was added to the tomb in the late Middle Kingdom / Second Intermediate Period. The artifact is of black basalt and represents the god Osiris mummified and wearing the White Crown of Upper Egypt, lying upon a lion headed bed. At the head and feet Osiris is protected by four falcons representing his son Horus and perched bove him is the goddess Isis depicted as a Kite. Photographed when the artifact was in the exhibit "Egypt's Sunken Cities" at the Minneapolis Institute of Art, November 10, 2018. Created using 125, 18 MP photographs (Canon EOS Rebel T5i) and Agisoft's Photoscan 1.4.3. Source: Objaverse 1.0 / Sketchfab
Petrified Tree: Florissant Fossil Beds (1/365)
Scan challenge Day 1/365 Petrified Tree: Florissant Fossil Beds Location: 38.91821707612003, -105.28437377227714 Created with Polycam Photo Mode (Cloud) + iPhone 12 w/ DJI OM3 Source: Objaverse 1.0 / Sketchfab
Bunk bed
Bunk bed Maya_subtance Source: Objaverse 1.0 / Sketchfab
Data for "Nanoparticle reinforced medium entropy CoCrFeNi produced by laser powder bed fusion: Microstructure evolution"
<p>Nanoparticle-reinforced metallic composites produced via laser powder bed fusion (LPBF) offer an economically feasible approach for obtaining high-strength near-net shaped critical components in automotive and aviation industries. This study investigates the equiatomic medium entropy alloy (MEA) CoCrFeNi manufactured by LPBF, incorporating two types of reinforcing particles, titanium nitride (TiN) and titanium oxide (TiO2), with varying sizes and volume concentrations. In this paper, we focus on analyzing the microstructure and texture evolution of all alloys, alongside examining the dissolution, precipitation and phase transitioning of the particles. TiN nanoparticles dissolve in the melt pool and uniformly precipitate as TiO2, forming novel core-shell nanoparticles resistant to coarsening. </p> <p>Here we share the STEM raw data files that were used in the analysis. We also share a general image analysis routine that used python based modules to measure the particle sizes and their volume fraction.</p> <p>In brief, we used the following steps for several images of each sample:<br>(a) Threshold the equalized grayscale image to create a binary image.<br>(b) Calculate the area fraction of the cleaned binary image.<br>(c) Detect contours in the binary image.<br>(d) Extract properties of circles from the contours, such as scaled diameter, and area.<br>(e) Draw circles on the original image using the detected contours.</p> <p><br>For TiN/5/800 samples containing multiple square-shaped particles, we assess the area of these squares and subsequently determine the diameter of a circle possessing an equivalent area.</p> <p>We also share the the raw file and the jupyter notebook for the 4DSTEM experiment conducted on the core-shell nanoparticle.</p>
Dataset: The bed and board services of crinoids to their associated fauna: a case study from the Great Reef of Toliara, SW Madagascar
<p><span>This is the datasets of Carbon and Nitrogen stable isotopes values of several crinoid species and their symbionts collected in the Great Reef of Toliara (SW Madagascar). These values have been submitted in the following manuscript:</span></p> <p><span>"The bed and board services of crinoids to their associated fauna: a case study from the Great Reef of Toliara, SW Madagascar" </span></p> <p><span>submitted in the journal "Community Ecology"</span></p>
S-LDSC bed files for CT-FM-SNP model (Kim et al., 2024, in prep)
Open the record for dataset details and reuse information.
Discrete-continuum numerical simulations of saltation over a rigid, bumpy bed
<p><span><span><span>The data provided here were obtained from discrete-continuum numerical simulations of saltation over a rigid, bumpy bed. The details of the simulation</span></span><span><span>s</span></span><span><span> are reported in the article entitled “</span></span><span><span><strong>Collisionless kinetic theory for saltation over a rigid, bumpy bed” </strong></span></span><span><span>by D. Berzi, A. Valance and J.T. Jenkins published in 2024 in the Journal of Fluid Mechanics.</span></span></span></p>
FIGURE 1 in Two new species of the genus Daptonema Cobb, 1920 (Nematoda: Xyalidae) found in an intertidal seagrass bed on the coast of the Andaman Sea, Thailand, with reference to the taxonomic status of the genus Trichotheristus Wieser, 1956
FIGURE 1. Daptonema chonispiculum sp. n. Male (Holotype ICHUM 5323; left side view): A) Entire body. B) Anterior region. C) Head region. D) Posterior region. E) Spicules and gubernaculum. Female (Allotype ICHUM 5324; left side view): F) Entire body. G) Vulval region. H) Posterior region. Bar scales: A, F, 100 µm; B, D, H, 40 µm; C, E, 10µm; G, 40 µm.
FIGURE 3 in Two new species of the genus Daptonema Cobb, 1920 (Nematoda: Xyalidae) found in an intertidal seagrass bed on the coast of the Andaman Sea, Thailand, with reference to the taxonomic status of the genus Trichotheristus Wieser, 1956
FIGURE 3. Daptonema phuketense sp. n. Male (Holotype ICHUM 5330, left side view): A) Copulatory apparatus and caudal glands. B) Caudal glands. Female (Paratype KUMF-T0016; left dorso-lateral view): C) Caudal glands. Bar scales: A, C, 20 µm; B, 10 µm. Arrows indicate the third caudal gland.
text-fig. 6. Skull reconstructions of representatives of Cretaceous OTUs in left lateral view, a, abelisaurid Camotaurus sastrei, Late Cretaceous (Campanian), Gorro Frigio Formation, Argentina; based on Bonaparte et al. (1990) and MACN CH 894. b, composite skull of a generalized baryonychid; mainly based on Suchomimus tenerensis (MNN GDF 501, 503-506) and Irritator challenged (SMNS 58022), with some elements reconstructed after Baryonyx walkeri (BMNH R 9951). c, carcharodontosaurid Carcharodontosaurus sahariens, Late Cretaceous (Cenomanian), Kem Kem beds, Morocco; based on Sereno et al. (1996) and SGM-Din 1, unpreserved elements shaded. D, dromaeosaurid Velociraptor mongoliensis, Late Cretaceous (Campanian), Djadokhta Formation, Mongolia; based on Barsbold (1983), Barsbold and Osmólska (1999), and AMNH 6515. e, ornithomimosaur Dromiceiomimus brevitertius, Late Cretaceous (Maastrichtian), Horseshoe Canyon Formation, Alberta, Canada; redrawn from Russell (1972). F, oviraptorosaur Oviraptor philoceratops, Late Cretaceous (Campanian), Djadokhta Formation, Mongolia; redrawn from Barsbold et al. (1990). G, therizinosauroid Erlikosaurus andrewsi, Late Cretaceous (Cenomanian- Turonian), Baynshiren Svita, Mongolia; based on Clark et al. (1994). H, tyrannosaurid Gorgosaurus libratus, Late Cretaceous (Campanian), Judith River Formation, Alberta, Canada, redrawn from Molnar et al. (1990). Abbreviations as in Text-figures 4 and 5, and: acc. op., accessory opening of unknown function in the premaxilla of Oviraptor (Barsbold et al. 1990); amf, anterior maxillary foramen; pn, pneumatic openings. Scale bars represent 50 mm (d-g) and 100 mm (a-c, h). in The interrelationships and evolution of basal theropod dinosaurs
text-fig. 6. Skull reconstructions of representatives of Cretaceous OTUs in left lateral view, a, abelisaurid Camotaurus sastrei, Late Cretaceous (Campanian), Gorro Frigio Formation, Argentina; based on Bonaparte et al. (1990) and MACN CH 894. b, composite skull of a generalized baryonychid; mainly based on Suchomimus tenerensis (MNN GDF 501, 503-506) and Irritator challenged (SMNS 58022), with some elements reconstructed after Baryonyx walkeri (BMNH R 9951). c, carcharodontosaurid Carcharodontosaurus sahariens, Late Cretaceous (Cenomanian), Kem Kem beds, Morocco; based on Sereno et al. (1996) and SGM-Din 1, unpreserved elements shaded. D, dromaeosaurid Velociraptor mongoliensis, Late Cretaceous (Campanian), Djadokhta Formation, Mongolia; based on Barsbold (1983), Barsbold and Osmólska (1999), and AMNH 6515. e, ornithomimosaur Dromiceiomimus brevitertius, Late Cretaceous (Maastrichtian), Horseshoe Canyon Formation, Alberta, Canada; redrawn from Russell (1972). F, oviraptorosaur Oviraptor philoceratops, Late Cretaceous (Campanian), Djadokhta Formation, Mongolia; redrawn from Barsbold et al. (1990). G, therizinosauroid Erlikosaurus andrewsi, Late Cretaceous (Cenomanian- Turonian), Baynshiren Svita, Mongolia; based on Clark et al. (1994). H, tyrannosaurid Gorgosaurus libratus, Late Cretaceous (Campanian), Judith River Formation, Alberta, Canada, redrawn from Molnar et al. (1990). Abbreviations as in Text-figures 4 and 5, and: acc. op., accessory opening of unknown function in the premaxilla of Oviraptor (Barsbold et al. 1990); amf, anterior maxillary foramen; pn, pneumatic openings. Scale bars represent 50 mm (d-g) and 100 mm (a-c, h).
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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.