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865 results for “beds”
Response of flow and saltating particle characteristics to bed roughness and particle spatial density
<p>The data were used in the paper "Response of flow and saltating particle characteristics to bed roughness and particle spatial density" which was submitted to "Journal of Geophysical Research-Earth Surface". In this paper, the effects of bed roughness and particle spatial density on the bedload transport are investigated by numerical simulations. The distributions of key parameters for saltation, including their changes, are assessed using the PDF curves. It is found that bed roughness is likely composed of particles of equivalent size for fine particles.</p>
Dataset on the dynamics of shallow wakes in gravel-bed floodplains: results of the field experiments on the Tagliamento River, Italy
<p>Shallow wakes in fluvial environments are hydrodynamic structures produced by in-stream obstructions such as boulders, log jams, patches of riparian and aquatic vegetation. Dynamics of wakes affect a range of biotic and abiotic processes including dispersal of aquatic organisms, mixing of pollutants, sediment deposition and therefore geomorphological changes in rivers. Despite their importance, fundamental mechanisms of shallow wakes development are not fully understood due to lack of experimental data collected in natural environments and free of scaling effects compared to laboratory studies. Present dataset provides explicit information on hydrodynamics of shallow wake flows produced by solid and porous instream obstructions. Controlled field experiments with 30 runs were conducted at the side-branch of the gravel-bed Tagliamento River in the North-Eastern Italy in the period from July till October 2019. During the experimental campaign we varied characteristics of the instream obstructions (their diameter, solid volume fraction, submergence and porosity at the leading edge) and approach velocity. Each run included: (1) measurements of mean velocity and turbulence in the longitudinal (25-30 sampling locations) and lateral transects (8-10 transects with 14 sampling locations) of the constructed experimental channel where model obstructions were placed; (2) detailed surveys of the free surface topography; and (3) flow visualizations and recordings of the wakes patterns using a drone. The dataset is intended to be used for understanding fundamental mechanisms of shallow wakes development in natural fluvial environments, examination of scaling effects and verification of numerical models.</p>
Dataset from: Reed bed vegetation structure and plant species diversity depend on management type and the time period since last management by Andersen et al. 2020 Applied Vegetation Science
<p>The dataset behind the paper Reed bed vegetation structure and plant species diversity depend on management type and the time period since last management by Andersen et al. 2020, Applied Vegetation Science, <a href="https://doi.org/10.1111/avsc.12531">https://doi.org/10.1111/avsc.12531</a></p> <p>The data contains information on the vegetation of four reed bed treatments all located within De Østlige Vejler, Denmark:</p> <p>- A 0-year-old harvested reed bed</p> <p>- A 0-year-old cut reed bed (reed stems left behind)</p> <p>- A 3-year-old harvested reed bed</p> <p>- A 25-year-old harvested reed bed</p>
Data from: Empirical and theoretical investigation into the potential impacts of insecticide resistance on the effectiveness of insecticide-treated bed nets
In spite of widespread insecticide resistance in vector mosquitoes throughout Africa, there is limited evidence that long lasting insecticidal bed nets (LLINs) are failing to protect against malaria. Here, we showed that LLIN contact in the course of host-seeking resulted in higher mortality of resistant Anopheles spp. mosquitoes than predicted from standard laboratory exposures with the same net. We also found that sub-lethal contact with an LLIN caused a reduction in blood feeding and subsequent host-seeking success in multiple lines of resistant mosquitoes from the lab and the field. Using a transmission model, we showed that when these LLIN-related lethal and sub-lethal effects were accrued over mosquito lifetimes, they greatly reduced the impact of resistance on malaria transmission potential under conditions of high net coverage. If coverage falls, the epidemiological impact is far more pronounced. Similarly, if the intensity of resistance intensifies, the loss of malaria control increases non-linearly. Our findings help explain why insecticide resistance has not yet led to wide scale failure of LLINs, but reinforce the call for alternative control tools and informed resistance management strategies.
Data from: An experimental study on coflow diffusion combustion in a pellet-packed bed with different bed lengths
In experimental investigations on axial symmetry, over-ventilated CH4/air diffusion combustion in a packed bed is executed to study the height, shape, and stability of the flame. The combustor is a quartz tube packed with alumina pellets in which a cylindrical fuel stream is surrounded by a coflow air nozzle. The results show that the bed length and pellet diameter have a significant influence on the flame properties. In general, the flame above the pellet surface has axial symmetry, and its shape and color are similar to those of a conventional diffusion flame when the bed length is smaller. The color of the flame front varies with the bed length. The changed color indicates an increased flame-front temperature and that the combustion regime above the bed surface may change from non-premixed combustion to partially premixed combustion or even premixed combustion due to the mix and dispersion effect in the packed bed. In addition, multiple flame behaviors, such as an inclined flame front, isolated reaction zone, and oscillatory motion followed by a pulsating sound with a few Hz in a packed bed, are observed experimentally. The possible reasons for these phenomena are discussed.
Data from: Regional difference in sex steroid action on formation of morphological sex differences in the anteroventral periventricular nucleus and principal nucleus of the bed nucleus of the stria terminalis
Sex steroid action is critical to form sexually dimorphic nuclei, although it is not fully understood. We previously reported that masculinization of the principal nucleus of the bed nucleus of the stria terminalis (BNSTp), which is larger and has more neurons in males than in females, involves aromatized testosterone that acts via estrogen receptor-α (ERα), but not estrogen receptor-β (ERβ). Here, we examined sex steroid action on the formation of the anteroventral periventricular nucleus (AVPV) that is larger and has more neurons in females. Morphometrical analysis of transgenic mice lacking aromatase, ERα, or ERβ genes revealed that the volume and neuron number of the male AVPV were significantly increased by deletion of aromatase and ERα genes, but not the ERβ gene. We further examined the AVPV and BNSTp of androgen receptor knockout (ARKO) mice. The volume and neuron number of the male BNSTp were smaller in ARKO mice than those in wild-type mice, while no significant effect of ARKO was found on the AVPV and female BNSTp. We also examined aromatase, ERα, and AR mRNA levels in the AVPV and BNSTp of wild-type and ARKO mice on embryonic day (ED) 18 and postnatal day (PD) 4. AR mRNA in the BNSTp and AVPV of wild-type mice was not expressed on ED18 and emerged on PD4. In the AVPV, the aromatase mRNA level was higher on ED18, although the ERα mRNA level was higher on PD4 without any effect of AR gene deletion. Aromatase and ERα mRNA levels in the male BNSTp were significantly increased on PD4 by AR gene deletion. These results suggest that estradiol signaling via ERα during the perinatal period and testosterone signaling via AR during the postnatal period are required for masculinization of the BNSTp, whereas the former is sufficient to defeminize the AVPV.
Supplementary Information for "Deciphering controls of pore-pressure evolution on sediment bed erosion by debris flows"
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Dataset for continuous dehydrogenation of perhydro benzyltoluene and perhydro dibenzyltoluene in a packed bed vertical tubular reactor
<p>This entry contains data from the continuous dehydrogenation of perhydro benzyltoluene and perhydro dibenzyltoluene in a packed bed vertical tubular reactor.</p><p>Operating conditions for perhydro benzyltoluene (H12-BT): reaction pressure 3, 4, 5 bar(a); heating temperature 290 - 320 °C, feed flow rate 5 - 25 mL/min.</p><p>Operating conditions for perhydro dibenzyltoluene (H18-DBT): reaction pressure 3 bar(a); heating temperature 290 - 320 °C, feed flow rate 5 - 25 mL/min; reaction pressure 1, 2 bar(a); heating temperature 290 - 310 °C, feed flow rate 5 - 25 mL/min.</p><p>Feed flow rates of 5, 10, 15, 20 and 25 mL/min correspond to liquid hourly space velocities (LHSV) of 0.6, 1.3, 1.9, 2,5 and 3.2 1/h.</p><p>The data sets provided contain temperature profiles, mean reaction temperatures, achieved conversions (degree of dehydrogenation, DoD) and mass fractions of evaporated LOHC for both carrier systems.</p><p> </p><p> </p>
Improving predictions of critical shear stress in gravel bed rivers: identifying the onset of sediment transport and quantifying sediment structure: Dataset
<p>This dataset accompanies the paper: Hodge RA, Voepel HE, Yager EM, Leyland J, Johnson JPL, Sear DA, Ahmed S. Improving predictions of critical shear stress in gravel bed rivers: identifying the onset of sediment transport and quantifying sediment structure. In review for Earth Surface Processes and Landforms. </p> <p>These data are from Figure 3 to 6. The aim of this part of the paper was to assess different methods for measuring the grain-scale sediment structure of a gravel-bed river. The approaches used are direct measurements, terrestrial laser scanning, and CT scanning. </p> <p> </p>
MRI data set for "Characterization of shear zones in soft granular beds by means of a novel magnetic resonance imaging technique"
<p>We introduce a new Magnetic Resonance Imaging technique to study the geometry of shear zones of soft, low-frictional and hard, frictional granular materials and their mixtures. Hydrogel spheres serve as the soft, low-frictional material component, while mustard seeds represent rigid, frictional grains. Some of the hydrogel spheres are doped with CuSO4 salt to serve as tracers. A cylindrical split-bottom cell is sheared stepwise and the shear profiles are determined from the differences of tomograms after successive shear steps, using Particle Imaging Velocimetry and Particle Tracking Velocimetry. We find that the shear zone geometry differs considerably between soft grains submersed in water and the same material without the embedding fluid.</p>
BigWig and Bed Files for Chromatin Accessibility
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Bed elevation
<p>Contains temporal bed elevation data.</p>
Tailored deformation behavior of 304L stainless steel through control of the crystallographic texture with Laser-Powder Bed Fusion
<p>Laser-powder bed fusion (L-PBF) has gained significant research interest, not only for its profound advantage of producing near-net shape complex geometries of metallic parts, but also for the possibility of producing tailored microstructures. Recent observations have shown that by adjusting the process parameters it is possible to manipulate the crystallographic texture, through the control of the geometrical features of the melt pool. It is also known that the deformation behavior, namely the transformation induced plasticity or twinning induced plasticity effects, of austenitic stainless steels are dependent on the crystallographic texture. Based on the aforementioned observations, the deformation behavior of austenitic stainless steels processed by L-PBF can be tailored. By adjusting the laser power and the laser scanning speed, tailored crystallographic textures were obtained, along the uniaxial loading direction in 304L stainless steel samples produced by L-PBF. The possibility to engineer the crystallographic textures and thus the deformation behavior, in metastable stainless steels, is demonstrated by performing in situ neutron diffraction and uniaxial tension and compression tests. The influence of the initial and the evolving crystallographic texture on the deformation behavior is demonstrated and elaborated accordingly. The observed asymmetry in the deformation behavior between tension and compression is also discussed in detail.</p>
Text-fig. 5. Anacardiaceae (a–m), Burseraceae (n–q). Scale bars = 1 cm. a–f: Pentoperculum sp. a–c: USNM PAL 772360. a: Lateral view of endocarp, apex up; three germination valves visible, the central clearly displaying the bipartite nature of the valve, reflected light, palladium coated. b: Apical view displaying six locules, with two preserved germination valves at the lower left, reflected light, palladium coated. c: Basal view of the endocarp, the locules suggested by swellings; note point of attachment, micro-CT scan surface rendering. d–f: Pentoperculum sp. USNM PAL 772359, reflected light, palladium coated. d: Lateral view of a probable 6-loculed endocarp, apex up; a single intact germination valve in the center, displaying the central lineation that divides it in two. e: Apical view; two bi-partite germination valves are visible, indicated by arrows to the middle cleavage line of two of the valves. f: Basal view, the locules suggested by the undulations in the margin. g–i: Indet. Spondioideae. USNM PAL 772358, reflected light, palladium coated. g: Lateral view of multi-locular endocarp, apex up. h: Apical view showing finely punctuate surface and peripheral locule cavities. i: Basal view. j–m: Cf. Pleiogynium USNM PAL 772357. j: Lateral view of the multi-locular endocarp, apex up; note intact germination valve on left and exposed locule facing the viewer, micro-CT scan surface rendering. k: Lateral view, rotated about 30° from (j), showing three exposed locules, reflected light, palladium coated; note bipartite locule lining at center. l: Apical view of the multilocular endocarp; the locule with intact germination valve at the upper right, reflected light, palladium coated. Arrows to each locule. m: Basal view showing central point of attachment and prominent radiating ridges aligned with the locules, micro-CT scan surface rendering. n–q: Canarium, USNM PAL 772361. Scale bar = 1 cm. n: Lateral view of endocarp directly facing one germination valve flanked by two strong ridges; apex up; specimen coated in sodium nitrate and photographed by R. A. Scott. o: Lateral view facing one of the three pronounced ridges, flanked to the left and right by two germination valves; apex up. p: Apical view displaying the three strong ridges, arching over the apex and flanking three deep embayments, covered with germination valves. q: Basal view, the three ridges being less pronounced. o–q: Reflected light, palladium coated. in The Early Middle Eocene Wagon Bed Carpoflora Of Central Wyoming, U.S.A.
Text-fig. 5. Anacardiaceae (a–m), Burseraceae (n–q). Scale bars = 1 cm. a–f: Pentoperculum sp. a–c: USNM PAL 772360. a: Lateral view of endocarp, apex up; three germination valves visible, the central clearly displaying the bipartite nature of the valve, reflected light, palladium coated. b: Apical view displaying six locules, with two preserved germination valves at the lower left, reflected light, palladium coated. c: Basal view of the endocarp, the locules suggested by swellings; note point of attachment, micro-CT scan surface rendering. d–f: Pentoperculum sp. USNM PAL 772359, reflected light, palladium coated. d: Lateral view of a probable 6-loculed endocarp, apex up; a single intact germination valve in the center, displaying the central lineation that divides it in two. e: Apical view; two bi-partite germination valves are visible, indicated by arrows to the middle cleavage line of two of the valves. f: Basal view, the locules suggested by the undulations in the margin. g–i: Indet. Spondioideae. USNM PAL 772358, reflected light, palladium coated. g: Lateral view of multi-locular endocarp, apex up. h: Apical view showing finely punctuate surface and peripheral locule cavities. i: Basal view. j–m: Cf. Pleiogynium USNM PAL 772357. j: Lateral view of the multi-locular endocarp, apex up; note intact germination valve on left and exposed locule facing the viewer, micro-CT scan surface rendering. k: Lateral view, rotated about 30° from (j), showing three exposed locules, reflected light, palladium coated; note bipartite locule lining at center. l: Apical view of the multilocular endocarp; the locule with intact germination valve at the upper right, reflected light, palladium coated. Arrows to each locule. m: Basal view showing central point of attachment and prominent radiating ridges aligned with the locules, micro-CT scan surface rendering. n–q: Canarium, USNM PAL 772361. Scale bar = 1 cm. n: Lateral view of endocarp directly facing one germination valve flanked by two strong ridges; apex up; specimen coated in sodium nitrate and photographed by R. A. Scott. o: Lateral view facing one of the three pronounced ridges, flanked to the left and right by two germination valves; apex up. p: Apical view displaying the three strong ridges, arching over the apex and flanking three deep embayments, covered with germination valves. q: Basal view, the three ridges being less pronounced. o–q: Reflected light, palladium coated.
Victorian Bed
A victorian bed from a older game proyect. Source: Objaverse 1.0 / Sketchfab
Figure 9 from: Ng PKL, Jeng M-S (2017) Notes on two crabs (Crustacea, Brachyura, Dynomenidae and Iphiculidae) collected from red coral beds in northern Taiwan, including a new species of Pariphiculus Alcock, 1896. ZooKeys 694: 135-156. https://doi.org/10.3897/zookeys.694.14871
Figure 9 - Pariphiculus stellatus sp. n. A, C, E holotype male (27.7 × 24.5 mm) (ASIZ 75485), Taiwan B female (32.3 × 27.6 mm) (ZRC 2017.185), Philippines F male (24.3 × 21.6 mm) (ZRC 2007.590), Philippines D, G, H female (35.1 × 29.6 mm) (ZRC 2007.590), Philippines. A, B intestinal region and posterior margin of carapace C antennae, antennules and orbit D female thoracic sternum and pleon E, F, H outer view of left chela G outer view of right chela. Abbreviation: stu = suborbital tubercle.
Figure 7 from: Ng PKL, Jeng M-S (2017) Notes on two crabs (Crustacea, Brachyura, Dynomenidae and Iphiculidae) collected from red coral beds in northern Taiwan, including a new species of Pariphiculus Alcock, 1896. ZooKeys 694: 135-156. https://doi.org/10.3897/zookeys.694.14871
Figure 7 - Pariphiculus stellatus sp. n. A, C–E holotype male (27.7 × 24.5 mm) (ASIZ 75485), Taiwan B female (32.3 × 27.6 mm) (ZRC 2017.185), Philippines F male (24.3 × 21.6 mm) (ZRC 2007.590), Philippines G female (35.1 × 29.6 mm) (ZRC 2007.590), Philippines. A, B, F, G overall dorsal view C–E dorsal view of carapace photographed from slightly different angles.
Figure 6 from: Ng PKL, Jeng M-S (2017) Notes on two crabs (Crustacea, Brachyura, Dynomenidae and Iphiculidae) collected from red coral beds in northern Taiwan, including a new species of Pariphiculus Alcock, 1896. ZooKeys 694: 135-156. https://doi.org/10.3897/zookeys.694.14871
Figure 6 - Pariphiculus agariciferus Ihle, 1918. A male (11.9 × 12.1 mm) (ZRC 2009.471), Vanuatu B male (15.8 × 15.0 mm) (ZRC 2017.187), Philippines C, J male (15.5 × 14.4 mm) (ZRC 2012.484), Philippines D male (12.8 × 13.7 mm) (ZRC 2017.186), Philippines E, G female (19.0 × 19.0 mm) (ZRC 2017.186), Philippines F, H female (22.1 × 21.3 mm) (ZRC 2009.288), Philippines I male (11.9 × 12.1 mm) (ZRC 2009.471), Vanuatu. A–F intestinal region and posterior margin of carapace G, H outer view of left chela I, J outer view of right chela.
Figure 5 from: Ng PKL, Jeng M-S (2017) Notes on two crabs (Crustacea, Brachyura, Dynomenidae and Iphiculidae) collected from red coral beds in northern Taiwan, including a new species of Pariphiculus Alcock, 1896. ZooKeys 694: 135-156. https://doi.org/10.3897/zookeys.694.14871
Figure 5 - Pariphiculus agariciferus Ihle, 1918. A, B female (19.8 × 18.9 mm) (ZRC 2017.181), Philippines C male (15.5 × 14.4 mm) (ZRC 2012.484), Philippines D young male (10.2 × 9.6 mm) (ZRC 2009.470), Vanuatu E male (11.9 × 12.1 mm) (ZRC 2009.471), Vanuatu F male (15.8 × 15.0 mm) (ZRC 2017.187), Philippines G, I female (22.1 × 21.3 mm) (ZRC 2009.288), Philippines H female (19.0 × 19.0 mm) (ZRC 2017.186), Philippines. A, B outer view of right third maxilliped C–E male thoracic sternum and pleon E female thoracic sternum and pleon G, H female thoracic sternum and pleon E female thoracic sternum and pleon I right fourth ambulatory leg.
Figure 3 from: Ng PKL, Jeng M-S (2017) Notes on two crabs (Crustacea, Brachyura, Dynomenidae and Iphiculidae) collected from red coral beds in northern Taiwan, including a new species of Pariphiculus Alcock, 1896. ZooKeys 694: 135-156. https://doi.org/10.3897/zookeys.694.14871
Figure 3 - Acanthodromia margarita (Alcock, 1899). A, B male (11.6 × 12.0 mm) (ZRC 2003.668), Philippines C, male (13.5 × 14.2 mm) (ZRC 2004.596), Philippines. A overall dorsal view B, C pleon showing tubercles on somite 4.
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.