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89 results for “Experimental mechanics”
Data from: The variation of grain size distribution in rock granular material in seepage process considering the mechanical-hydrological-chemical coupling effect: An experimental research
<p>As a common solid waste in geotechnical engineering, rock granular material should be properly treated and recycled. Rock granular material often coexists with water when it is used as the filling material in geotechnical engineering. Water flowing in rock granular materials is a complex progress with the mechanical-hydrological-chemical (MHC) coupling effect, i. e. the water scours in the gaps and spaces in the rock granular material structure, produces chemical reactions with rock grains, rock grains squeeze each other under the water pressure and compression leading re-breakage and producing secondary rock grains, the fine rock grains are migrated with water and rushed out. In this process, rock grain size distribution (GSD) changes, it affects the physical and mechanical characteristics of the rock granular materials, and even influences the seepage stability of the rock granular materials. To study the variation of GSD in the rock granular material considering the MHC coupling effect after the seepage process, seepage experiments of rock grain samples are carried out and analyzed in this paper. The result is expected to have a positive impact on further studies of the properties of the rock granular material.</p>
Data from: Effects of fleas on nest success of Arctic barnacle geese: experimentally testing the mechanism
Parasites have detrimental effects on their hosts' fitness. Therefore, behavioural adaptations have evolved to avoid parasites or, when an individual is already in contact with a parasite, prevent or minimize infections. Such anti-parasite behaviours can be very effective, but can also be costly for the host. Specifically, ectoparasites can elicit strong host anti-parasite behaviours and interactions between fleas (Siphonaptera) and their hosts are one of the best studied. In altricial bird species, nest fleas can negatively affect both parent and offspring fitness components. However, knowledge on the effects of fleas on precocial bird species is scarce. Research on geese in the Canadian Arctic indicated that fleas have a negative impact on reproductive success. One possible hypothesis is that fleas may affect female incubation behaviour. Breeding females with many fleas in their nest may increase the frequency and/or duration of incubation breaks and could even totally desert their nest. The aim of our study was to 1) determine if a similar negative relationship existed between flea abundance and reproductive success in our study colony of Arctic breeding barnacle geese Branta leucopsis and 2) experimentally quantify if such effects could be explained by a negative effect of nest fleas on female behaviour. We compared host anti-parasite and incubation behaviour between experimentally flea-reduced and control nests using wildlife cameras and temperature loggers. We found that flea abundance was negatively associated with hatching success. We found little experimental support, however, for changes in behaviour of the breeding female as a possible mechanism to explain this effect.
Figure 2 in Retraction to "Protocatechuic acid attenuates cerebral aneurysm formation and progression by inhibiting TNF-alpha/Nrf-2/NF-kB-mediated inflammatory mechanisms in experimental rats".
Figure 2: Lateral (above), dorsal (below, left) and ventral (below, right) views of the skull and labial view of the mandible (middle) of a male CtenomYS dorSaliS (FMNH 54391) from Colonia Fernheim, Boquerón, Paraguay. Scale = 5 mm.
Figure 3 in Retraction to "Protocatechuic acid attenuates cerebral aneurysm formation and progression by inhibiting TNF-alpha/Nrf-2/NF-kB-mediated inflammatory mechanisms in experimental rats".
Figure 3: Map of Paraguay and surroundings, showing the newly documented localities for CtenomYS dorSaliS (1 – Paraguay: Boqueron; Colonia Fernheim, 16 km W Filadelfia; and 2 – Paraguay: Boqueron; Colonia Mennonita, Orloff). Localities discussed by Contreras and Roig (1992) as possible type localities of this species include: 3 – Misión Inglesa, Waikhtlatingmalyalwa and 4 – a point between Las Juntas and Fortín Page. The dotted line corresponds to the limit between Bolivia and Paraguay according to the Treaty of Benítez-Ichazo (23th November 1894). The suggested distribution for this species proposed by Bidau (2015) is indicated in light blue (??). Landscape cover represents the ecoregions according to Olson et al. (2001).
Figure 1 in Retraction to "Protocatechuic acid attenuates cerebral aneurysm formation and progression by inhibiting TNF-alpha/Nrf-2/NF-kB-mediated inflammatory mechanisms in experimental rats".
Figure 1: Dorsal, ventral and lateral view of the skin of a female of CtenomYS dorSaliS (FMNH 54396) from Colonia Fernheim, Boquerón, Paraguay.
Figure 5 in Retraction to "Protocatechuic acid attenuates cerebral aneurysm formation and progression by inhibiting TNF-alpha/Nrf-2/NF-kB-mediated inflammatory mechanisms in experimental rats".
Figure 5: Pairwise distance values for divergence within the genus CtenomYS, including interspecific (range 0.029–0.077, with an average of 0.046) and intraspecific (range = 0–0.049, with an average of 0.008) ranges and values for divergence within C. dorSaliS and between C. dorSaliS and various other members of the genus.
Figure 4 in Retraction to "Protocatechuic acid attenuates cerebral aneurysm formation and progression by inhibiting TNF-alpha/Nrf-2/NF-kB-mediated inflammatory mechanisms in experimental rats".
Figure 4: Garli tree inferred from the maximum likelihood (ML) analysis of the 1140 bp Cytb dataset, partitioned by first, second and third codon position, under the GTR + G4 + I model for the three codon positions of sequence evolution. Node values represent Garli1000 bootstrap replicate percentages (BPs).
Data Set: The influence of roughness on experimental fault mechanical behaviour and associated microseismicity
<p>This is the data set used to create the figures for the submitted manuscript, The influence of roughness on experimental fault mechanical behaviour and associated microseismicity. Submitted July 2022 to the Journal of Geophysical Research: Solid Earth. Article DOI: 10.1029/2022JB025113</p>
Shear resistance variations in experimentally sheared mudstone granules: a possible shear-thinning and thixotropic mechanism
<p>The dataset contains the experimental data used in the paper.</p>
Data from: Experimental evidence supports the ability of spotted lanternfly to hitchhike on vehicle exteriors as a mechanism for anthropogenic dispersal
<p>This data is a companion to this paper: </p> <p>Johanna E Elsensohn, Scott Wolford, Amy Tabb, Tracy Leskey, “Experimental evidence supports the ability of spotted lanternfly to hitchhike on vehicle exteriors as a mechanism for anthropogenic dispersal,” 2024, Royal Society Open Science 11:240493. <a href="https://doi.org/10.1098/rsos.240493">doi:10.1098/rsos.240493</a>. </p> <p><br><strong>Manually-measured data</strong></p> <p>Experiments are detailed in the paper and data is contained in the table in this data release. Details of the data are available in the paper; we also summarize and define acronyms contained in the table here.</p> <p>Stage: insect life cycle stage. Values are 1<sup>st</sup>, 2<sup>nd</sup>, 3<sup>rd</sup>, 4<sup>th</sup> instars, early adult, and late adult.</p> <p>Location: location on the vehicle where the insect was placed for the experiment. Values, and their USA equivalents:</p> <p>- bonnet = hood.</p> <p>- nose wing = side panel.</p> <p>- scuttle panel = cowl panel.</p> <p>- wiper blade = wiper.</p> <p>- windscreen = windshield.</p> <p>Acclim.: means that the insect was allowed an acclimation period. 1 = yes there was an acclimation period, 0 = no there was not an acclimation period.</p> <p>Max RPM reached (0/1) : the insect remained attached to the vehicle at the maximum revolutions per minute (RPM) of the blower fan, 1850 RPM, equivalent to wind speed output was 100 ± 5 km/h 60cm from the housing exhaust. </p> <p>Max RPM reached: the maximum revolutions per minute (RPM) of the blower fan at which time the insect was detached from the vehicle.</p> <p>Windspeed (ft/min): conversion of insect detachment RPM (column 7) to feet/minute.</p> <p>Windspeed (KPH): conversion of insect detachment RPM (column 7) to windspeed in kilometers/hour.</p> <p>Body size: values are null (.), small (s), and (large). The body size is only assessed for the adult life stages; all instar stages have null. The adult is considered ‘small’ if the lateral yellow area on the insect’s underside was concave or flat and less than 2 mm wide. The insect was labelled ‘large’ if the lateral yellow area was ≥ 2 mm wide and convex.</p> <p>Sex (m/f): sex (male, female) was determined for the adult stages only. All of the instar stages have the value null (.).</p>
Experimental data for "The developmental mechanics of divergent buckling patterns in the chick gut"
<p>Experimental geometric, modulus, and differential growth raw data, measurments, and MATLAB codes from "The developmental mechanics of divergent buckling patterns<br>in the chick gut":</p> <p>Tissue buckling is an increasingly appreciated mode of morphogenesis in the embryo,<br>but it is often unclear how geometric and material parameters are molecularly determined<br>in native developmental contexts to generate diverse functional patterns. Here,<br>we study the link between differential mechanical properties and the morphogenesis<br>of distinct anteroposterior compartments in the intestinal tract—the esophagus, small<br>intestine, and large intestine. These regions originate from a simple, common tube<br>but adopt unique forms. Using measured data from the developing chick gut coupled<br>with a minimal theory and simulations of differential growth, we investigate divergent<br>lumen morphologies along the entire early gut and demonstrate that spatiotemporal<br>geometries, moduli, and growth rates control the segment-specific patterns of mucosal<br>buckling. Primary buckling into wrinkles, folds, and creases along the gut, as well<br>as secondary buckling phenomena, including period-doubling in the foregut and<br>multiscale creasing-wrinkling in the hindgut, are captured and well explained by<br>mechanical models. This study advances our existing knowledge of how identity leads to<br>form in these regions, laying the foundation for future work uncovering the relationship<br>between molecules and mechanics in gut morphological regionalization.</p>
Dataset for "Evolutionary Dynamics and Mechanisms of Chain-style Landslide Dam Failure Hazard: Insights from Experimental Field Research"
<p>Yang et al. (2024) Dataset for "Evolutionary Dynamics and Mechanisms of Chain-style Landslide Dam Failure Hazard: Insights from Experimental Field Research", Journal of Geophysical Research-Earth Surface.</p> <p>The data that support the findings of this study are available on request from the corresponding author upon reasonable request.</p>
Experimental data used in the article entitled "Exploring microstructure refinement and deformation mechanisms in severely deformed LPBF AlSi10Mg alloy"
Open the record for dataset details and reuse information.
Experimental and Simulation data for the molecular mechanism of temperature-dependent phase separation of HSF1
<p>1. lmp_datatfile</p> <p>The documents contain the LAMMPS input datafiles of initial configuration used to run all simulations, including single chain, trimer(LZ1-3-RD), and RD systems.</p> <p>2.Experimental data.</p> <p>The documents contain original ucsf data</p>
Input data for "Characterisation of the mechanism of Bile Salt Hydrolase substrate specificity by experimental and computational analyses"
<p>Topologies, coordinates, input and analysis scripts for Amber20 simulations performed in "Characterisation of the mechanism of Bile Salt Hydrolase substrate specificity by experimental and computational analyses", Structure, 2023</p>
mulTi-Arm Therapeutic Study in Pre-ICu Patients Admitted With Covid-19 - Experimental Drugs and Mechanisms
ClinicalTrials.gov study NCT04393246. IPD Sharing: NO. Countries: 1. Publications: 3.
Mechanisms of Acupuncture Analgesia on Experimental Dental Pain - A Psychophysical Study (Phase1)
ClinicalTrials.gov study NCT02589418. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Effects of GABA-a-Agonists on Pain Mechanisms: An Experimental Study in Healthy Volunteers
ClinicalTrials.gov study NCT01011036. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Data from: Effects of fleas on nest success of Arctic barnacle geese: experimentally testing the mechanism
Open the record for dataset details and reuse information.
Data from: The variation of grain size distribution in rock granular material in seepage process considering the mechanical-hydrological-chemical coupling effect: An experimental research
Open the record for dataset details and reuse information.
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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.