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2,281 results for “laboratories”
A Novel Laboratory Technique for Measuring Grain Size Specific Transport Characteristics of Bed Load Pulses
<p>We present a novel, time-efficient and non-destructive laboratory technique to investigate grain size specific transport characteristics of bed load pulses. The method consists of a through-water, high-resolution image acquisition followed by the application of a supervised color classification algorithm (Gaussian Maximum Likelihood Classification). Quality assessment based on a confusion matrix approach and basic random sampling showed a high classification performance. By statistically analyzing the temporal and spatial color distribution of the experimental reach, characteristic parameters to describe the propagation behavior were determined. The analyzed bed load pulse consisted of five different grain size classes of dyed quartz sand and gravel, each having a unique color. The initial experimental bed was uni-colored and contained the same size fractions as the augmented pulse.</p>
HOUSEFUL - Laboratory AnMBR
<p>Datasets regarding Anaerobic Membrane Bioreactor optimisation and operation at laboratory scale.</p>
Craving money? Evidence from the laboratory and the field
<p>We propose a new model of choice under repeated exposure to gambles. In it, the agent may come to choose a negative expected value, negative skew gamble, due to a behavioral bias that has a neurobiological foundation. We run laboratory experiments as a first step in testing the model and supplement the experimental findings with suggestive evidence from observational data. In the process of doing so, we identify a new asset pricing anomaly. The findings bring novel insights into the motivations underlying investor decisions and the impact of temptation and self-control in contexts of repeated risk-taking. </p>
Processing, Spectroscopic and Laboratory Testing Data from a Medical Grade Hot-Melt Extrusion Process
<p>This dataset contains a collection of raw processing data, spectroscopic data, and laboratory test results of medical-grade polymer extrusion experiments. The data was collected in several experiments conducted in a hot-melt extrusion process. The process involved extruding PLA through a slit die and drawing the extruded strands onto spools to obtain the desired dimensional and mechanical properties. The strands were later knitted to form the final medical implant. Throughout the experiments, the extrusion process and equipment were upgraded and refined. Various operational scenarios were simulated under different nozzle configurations. The experiments start using a single-screw extruder and later progress to a double-screw extruder. Medical Grade PURASORB PLA (PLDLA 96/4) material was used when the hardware upgrades were complete. This dataset contains many variations in experimental conditions. However, enough overlap exists to derive working datasets from this compiled raw data.</p> <p> </p> <p>Two working datasets have been derived from this compiled raw data. Using a double-screw extruder, both working Datasets investigate polymer degradation in the hot-melt extrusion process. Both derived datasets are included in this collection.</p> <p> </p> <p>Two Jupyter notebooks are included in this data collection. The first notebook gives an example of how an initial dataset can be derived from the raw data using data science techniques. The second notebook gives an example of how a final dataset can be created from the initial dataset.</p>
24-hour HYSPLIT-STILT back-trajectories initialized at Storm Peak Laboratory, Colorado from April 1, 2022 to May 1, 2022
<p>This dataset was compiled to accompany the manuscript Lee et al., titled "Elevated Tropospheric Iodine over the Central Continental United States: Is Iodine a Major Oxidant of Atmospheric Mercury?", submitted to AGU Geophysical Research Letters.</p> <p>24-hour HYSPLIT-STILT back trajectories were initialized at Storm Peak Laboratory, Colorado (40.455 degrees North, 106.744 degrees West) every three hours from April 1, 2022 to May 1, 2022 at initial altitudes of 5, 2000, 4000, 6000, 8000, and 10000 meters above ground level. In the model, Storm Peak Laboratory is 2890 meters above sea level (3209.848 meters above sea level in reality). One thousand back trajectories were initialized at each time-altitude pair, then averaged in three dimensions (latitude, longitude, altitude) to generate a single back trajectory for each time-altitude pair.</p> <p>Each file is named using the following convention: "STILT_StormPeakLaboratory_yyyymmdd_HHMMutc.txt", where yyyy is the four-digit year, mm is the two-digit month, dd is the two-digit day, HH is the two-digit hour, and MM is the two-digit minute. The date and time in the filename denote the back-trajectory initialization time (UTC).</p>
Figure 2 in Development and life table parameters of the Phytoseius corniger Wainstein (Acari: Phytoseiidae) feeding on the two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) under laboratory conditions
Figure 2. The age-specific survival rate (lx), and fecundity (mx) of Phytoseius corniger fed on Tetranychus urticae under laboratory conditions (25 ± 2 °C, 55 ± 5% of RH, and 16L: 8D h photoperiod).
Figure 1 in Development and life table parameters of the Phytoseius corniger Wainstein (Acari: Phytoseiidae) feeding on the two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) under laboratory conditions
Figure 1. Age-stage specific survival rate (sjx) of the parent cohort of bisexual Phytoseius corniger fed on Tetranychus urticae under laboratory conditions (25 ± 2 °C, 55 ± 5% of RH, and 16L: 8D h photoperiod). Note: L stands for larva, N1 for protonymph, and N2 for deutonymph, respectively.
Fig. 2. Haplotype network calculated from the E in Molecular assessment of commercial and laboratory stocks of Eisenia spp. (Oligochaeta: Lumbricidae) from South Africa
Fig. 2. Haplotype network calculated from the E. andrei COI haplotypes found in the South African earthworm groups investigated. The size of the circles is proportional to the number of earthworms sharing the same haplotype. The numbers on the branches indicate the positions of mutations on the COI sequences, mv1 represents a median vector (intermediate haplotypes, not found in this study).
Fig. 1 in Molecular assessment of commercial and laboratory stocks of Eisenia spp. (Oligochaeta: Lumbricidae) from South Africa
Fig. 1. Neighbour-joining tree based on the K2P method. Bootstrap support obtained for specific nodes are reported. Genbank accession numbers or BOLD process IDs are provided in brackets for the sequences downloaded from either Genbank or BOLD. Allolobophoridella eiseni and Microscolex phosphoreus were included as outgroups. Asterisk indicates dubious E. andrei sequences from BOLD.
Experimental data from laboratory studies on the generation and evolution of internal tides under various Coriolis parameters
<p>The dataset includes experimental data from laboratory studies on the generation and evolution of internal tides under various Coriolis parameters.</p> <p>"uu" and "uh" are horizontal velocities. (unit: m/s)<br>"vv" and "vh" are vertical velocities. (unit: m/s)<br>"xx" and "yy" are the horizontal and vertical coordinates, respectively. (unit: m)</p> <p>The frequency of internal tide is 0.68 rad/s.<br>The Coriolis parameters are 0, 0.13, 0.17, 0.21, 0.25, 0.29, 0.335, 0.38, 0.42, 0.46, 0.54 rad/s for f00 to f26.<br>The time interval is 0.2s.</p>
Dataset "Comprehensive laboratory constraints on thermal desorption of interstellar ice analogues"
<p>### Dataset Overview ###</p> <p>This dataset contains Temperature-Programmed Desorption data corresponding to the series of experiments described in Table 2 of our accompanying paper "Comprehensive laboratory constraints on thermal desorption of interstellar ice analogues". The focus of these experiments is to explore the thermal desorption of various molecular ice mixtures under specific conditions.</p> <p> </p>
F I G U R E 2 in Assessing the sub-lethal impacts of insecticides on aphid parasitoids through laboratory-based studies
F I G U R E 2 Mummification rate of Aphidius colemani and Aphelinus abdominalis per aphid alive at 5 days after parasitoid introductions. The horizontal black lines represent the mean aphid mummification rate across all replicates, and the blue boxes represent the 95% credible intervals.
F I G U R E 3 in Oviposition by the oriental fruit fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae), on five citrus types in a laboratory
F I G U R E 3 Mean (±1 SE) proportion of time female Bactrocera dorsalis spent on aggression, grooming, oviposition, probing, being inactive, and walking and tasting on (a) damaged and (b) undamaged citrus types and a positive control (Golden Delicious apple). Citrus types investigated were Golden Delicious apple, Delta Valencia orange, Eureka lemon, Glen Ora navel orange, Nadorcott mandarin and Star Ruby grapefruit. Each female was observed for 20 min.
F I G U R E 2 in Oviposition by the oriental fruit fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae), on five citrus types in a laboratory
F I G U R E 2 First-order Markovian analyses showing the probability of transition from one behaviour to another by gravid female Bactrocera dorsalis on (a) damaged and (b) undamaged citrus (all types pooled). Transitions with p ≥ 0.10 are indicated by solid lines, and those with 0.09 ≥ p ≥ 0.03 are indicated by dashed lines. Values in parentheses indicate frequencies of each behaviour observed.
F I G U R E 6 in Assessing the sub-lethal impacts of insecticides on aphid parasitoids through laboratory-based studies
F I G U R E 6 The proportion of female F1 Aphelinus abdominalis and Aphidius colemani adults that emerged from females exposed to insecticides. The horizontal black lines represent the mean emergence rate of females across all replicates, and the blue boxes represent the 95% credible intervals.
F I G U R E 1 in Assessing the sub-lethal impacts of insecticides on aphid parasitoids through laboratory-based studies
F I G U R E 1 Mortality for each parasitoid species following exposure to each treatment after 72 h. The horizontal black lines represent the mean mortality across all replicates, and the blue boxes represent the 95% credible intervals.
F I G U R E 5 in Assessing the sub-lethal impacts of insecticides on aphid parasitoids through laboratory-based studies
F I G U R E 5 Reduction in reproductive capacity estimated for Aphelinus abdominalis and Aphidius colemani following insecticide exposure. The horizontal black lines represent the mean reduced reproductive capacity across all replicates, and the orange boxes represent the 95% credible intervals.
F I G U R E 1 in Oviposition by the oriental fruit fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae), on five citrus types in a laboratory
F I G U R E 1 Non-metric multidimensional scaling (NMDS) ordination plot showing the relative similarity of essential oil composition of different citrus types and degrees of ripeness. Ellipses represent 95% confidence intervals. The treatments tested were degrees of ripeness denoted as Green, Colour Break, Ripe or Over Ripe and were tested on variants Eureka lemon, Nadorcott mandarin, Glen Ora Late navel orange, Delta Valencia orange and Star Ruby grapefruit.
F I G U R E 3 in Assessing the sub-lethal impacts of insecticides on aphid parasitoids through laboratory-based studies
F I G U R E 3 Reduction in parasitism capacity estimated for Aphelinus abdominalis and Aphidius colemani following insecticide exposure. The horizontal black lines represent the mean reduced parasitism capacity across all replicates, and the orange boxes represent the 95% credible intervals.
F I G U R E 4 in Assessing the sub-lethal impacts of insecticides on aphid parasitoids through laboratory-based studies
F I G U R E 4 Emergence rates of F1 Aphelinus abdominalis and Aphidius colemani adults following insecticide exposure. The horizontal black lines represent the mean emergence rates across all replicates, and the blue boxes represent the 95% credible intervals.
ScienceDex guides
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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.