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638 results for “thinning”
Data from: Phenolics lie at the center of functional versatility in the responses of two phytochemically diverse tropical trees to canopy thinning
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Serial thin section movie of every third section from the DTC to the distal extensions of Sh1 in a young adult hermaphrodite posterior gonad arm
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Synthesis of Bi2S3 thin films based on pulse-plating bismuth nanocrystallines and its photoelectrochemical properties
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Supplemental information for "Creating thin magnetic layers at the surface of 2 Sb2Te3 topological insulators using a low-energy chromium ion beam"
<p>A test upload of the data repository to Zenodo</p>
Single-layer graphene on epitaxial FeRh thin films_experimental dataset
<p>This file contains the raw unprocessed experimental data for the results published in Uhlíř et al., Single-layer graphene on epitaxial FeRh thin films, Applied Surface Science, Volume 514, June 2020, 145923. </p>
Wildfire behaviour data for an experimental crown fire in thinned boreal black spruce, Alberta, Canada, 2019-05-11
<p>Data describing an experimental forest fire in Wabasca, Alberta, Canada in May 2019. The fire is described in detail in the paper: "Recent Crown Thinning in a Boreal Black Spruce Forest Does Not Reduce Spread Rate nor Total Fuel Consumption: Results from an Experimental Crown Fire in Alberta, Canada" https://doi.org/10.3390/fire3030028</p>
Figure 3 from: Pykälä J, Kantelinen A, Myllys L (2020) Taxonomy of Verrucaria species characterised by large spores, perithecia leaving pits in the rock and a pale thin thallus in Finland. MycoKeys 72: 43-92. https://doi.org/10.3897/mycokeys.72.56223
Figure 3 Schematic drawings of sections of perithecia of the study species A involucrellum apical B involucrellum covering half of the exciple C involucrellum reaching the exciple base level D involucrellum enveloping the exciple.
Figure 1 from: Pykälä J, Kantelinen A, Myllys L (2020) Taxonomy of Verrucaria species characterised by large spores, perithecia leaving pits in the rock and a pale thin thallus in Finland. MycoKeys 72: 43-92. https://doi.org/10.3897/mycokeys.72.56223
Figure 1 Phylogenetic relationships of Verrucaria with large spores, perithecia leaving pits in the rock and pale thin thallus belonging to the Thelidium group. A Maximum Likelihood phylogram obtained from the RAxML analysis is based on the ITS dataset. Bootstrap values (> 50%) are shown at nodes. The node leading to the ingroup is shortened and is in reality three times longer.
Figure 2 from: Pykälä J, Kantelinen A, Myllys L (2020) Taxonomy of Verrucaria species characterised by large spores, perithecia leaving pits in the rock and a pale thin thallus in Finland. MycoKeys 72: 43-92. https://doi.org/10.3897/mycokeys.72.56223
Figure 2 Habitus of the new Verrucaria species AV. bifurcata (holotype) BV. cavernarum (holotype) CV. difficilis (holotype) DV. fuscozonata (holotype) EV. kuusamoensis (holotype) FV. subdevergens (holotype) GV. vacillans (holotype). Scale bars: 1 mm (A–D), 0.5 mm (E–G).
Data set for "Logic-in-Memory Based on an Atomically Thin Semiconductor"
<p>Curves related to device characteristics from the paper "Logic-in-Memory Based on an Atomically Thin Semiconductor", Nature 2020, doi:10.1038/s41586-020-2861-0</p>
Inland limits to diffusion of thinning along Greenland Ice Sheet outlet glaciers
<p>This dataset contains limits to the inland diffusion of terminus-initiated thinning along 141 Greenland Ice Sheet outlet glaciers. The data is separated in 187 files and each file contains data for an individual outlet glacier or a branch of an outlet glacier. Shapefiles and NetCDF files are provided with data for 6 primary flowlines, and up to 18 iterated flowlines, spanning the width of each glacier. The iterated flowlines are used to find the furthest inland thinning limits (see the associated publication for more details). Files are named <em>glacierXXXX </em>where <em>XXXX </em>is the identifier for an individual glacier or branch. Identifiers that begin with a letter ('a', 'b', 'c', or 'd') represent a separate branch of an outlet glacier. Shapefiles filenames have an additional <em>_iterNN </em>suffix, where <em>NN</em> identifies the iteration number of that set of flowlines.</p> <p>The shapefiles contain multiple features, each of which is one flowline. Each flowline has a "flowline" attribute, a two-digit identifier that corresponds to the same identifier in the NetCDF files. The NetCDF files contains glacier geometry, dynamic thinning, Peclet number, and identified knickpoints, extracted and calculated along the primary and iterated flowlines. The flowlines in the NetCDF files have a regular 50-meter spacing between nodes, whereas the flowlines in the shapefiles have a coarser and irregular spacing.</p> <p>More information on how the flowlines were derived and how data was extracted and calculated is in the associated publication (Felikson et al., 2020), with a DOI to be provided. Example code that can be used to read and plot the data can be obtained at http://doi.org/10.5281/zenodo.4284715.</p>
Data from: Density-dependent energy use contributes to the self-thinning relationship of cohorts
In resource-limited populations, an increase in average body size can occur only with a decline in abundance. This is known as self-thinning, and the decline in abundance in food-limited populations is considered proportional to the scaling of metabolism with body mass. This popular hypothesis may be inaccurate, because self-thinning populations can also experience density-dependent competition, which could alter their energy use beyond the predictions of metabolic scaling. This study tested whether density-dependent competition has an energetic role in self-thinning, by manipulating the abundance of the fish Macquaria novemaculeata and tank size to partition the effects of competition from metabolic scaling. We found that self-thinning can be density dependent and that changes in intraspecific competition may be more influential than metabolic scaling on self-thinning relationships. The energetic mechanism we propose is that density-dependent competition causes variation in the allocation of energy to growth, which alters the energetic efficiency of self-thinning cohorts. The implication is that food-limited cohorts and populations with competitive strategies that encourage fast-growing individuals will have less body mass at equilibrium and higher mortality rates. This finding sheds light on the processes structuring populations and can be used to explain inconsistencies in the mass-abundance scaling of assemblages and communities (the energetic-equivalence rule).
Data from: The thermoelectric properties of Au nanoparticle-incorporated Al-doped mesoporous ZnO thin films
Mesoporous Al-doped ZnO thin films incorporated with gold nanoparticles (Au NPs) were synthesized using a sol-gel and evaporation-induced self-assembly process. In this work, the complementary effects of Au NP incorporation and Al doping on the mesoporous ZnO thin films' thermoelectric properties were analyzed. The incorporated Au NPs induced an increase in electrical conductivity but a detriment in the pore arrangement of the mesoporous ZnO thin film, which was accompanied by a decrease in porosity. However, the addition of the Al dopant minimized the pore structural collapse because of the inhibition of the grain growth in the ZnO skeletal structure, resulting in an enhancement of the pore arrangement and porosity. When the Au NPs and Al dopant were added at the same time, the degradation in the pore structure was minimized and the electrical conductivity was effectively increased but the absolute value of the Seebeck coefficient was decreased. However, as a result, the thermoelectric power factor was increased by 2.4 times compared to the pristine mesoporous ZnO thin film. It was found that co-introducing the Au NPs and Al doping to the mesoporous ZnO structure was effective in preserving the pore structure and increasing the electric conductivity, thereby enhancing the thermoelectric property of the mesoporous ZnO thin film.
Data from: Photocatalytic activity of graphene oxide–TiO2 thin films sensitized by natural dyes extracted from Bactris guineensis
This study synthesized and characterized composites of graphene oxide and TiO2 (GO-TiO2). GO-TiO2 thin films were deposited using the Doctor Blade technique. Subsequently, the thin films were sensitized with a natural dye extracted from a Colombian source (Bactris guineensis). Thermogravimetric analysis, X-ray diffraction, Raman spectroscopy, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and diffuse reflectance measurements were used for physicochemical characterization. All the samples were polycrystalline in nature, and the diffraction signals corresponded to the TiO2 anatase crystalline phase. Raman spectroscopy and FT-IR verified the synthesis of composite thin films, and the SEM analysis confirmed the TiO2 films morphological modification after the process of GO incorporation and sensitization. XPS results suggested a possibility of appearance of Titanium (III) through the formation of oxygen vacancies (Ov). Furthermore, the optical results indicated that the presence of the natural sensitizer and GO improved the optical properties of TiO2 in the visible range. Finally, the photocatalytic degradation of Methylene Blue (MB) was studied under visible irradiation in aqueous solution, and pseudo-first order model was used to obtain kinetic information about photocatalytic degradation. These results indicated that the presence of GO has an important synergistic effect in conjunction with the natural sensitizer, reaching a photocatalytic yield of 33%.
Data from: Topological, chemical, and electro-optical characteristics of riboflavin-doped artificial and natural DNA thin films
DNA is considered as a useful building bio-material, and it serves as an efficient template to align functionalized nanomaterials. Riboflavin (RF)-doped synthetic double-crossover DNA (DX-DNA) lattices and natural salmon DNA (SDNA) thin films are constructed using substrate assisted growth and drop-casting methods, respectively, and their topological, chemical, and electro-optical characteristics were evaluated. The critical doping concentration of RF ([RF]C, ~5 mM) at given concentrations of DX-DNA and SDNA were obtained by observing the phase transition (from crystalline to amorphous structures) of DX-DNA and precipitation of SDNA in solution above [RF]C. [RF]C are verified by analyzing the atomic force microscopy images for DX-DNA and current, absorbance, and photoluminescence for SDNA. We study the physical characteristics of RF-embedded SDNA thin films, which are the Fourier transform infrared (FTIR) spectrum to understand the interaction between the RF and DNA molecules, current to evaluate the conductance, absorption to understand the RF binding to the DNA, and photoluminescence (PL) to analyze the energy transfer between the RF and DNA. The current and UV absorbance band of SDNA thin films decrease up to [RF]C followed by an increase above [RF]C. In contrast, the PL intensity illustrates the reverse trend, as compared to the current and UV absorbance behavior as a function of the varying [RF]. Due to the intense PL characteristic of RF, the DNA lattices and thin films with RF might offer immense potential to develop efficient bio-sensors and useful bio-photonic devices.
Data from: Facilitation among plants can accelerate density-dependent mortality and steepen self-thinning lines in stressful environments
The speed and slope of plant self-thinning are all affected by plant-plant interactions across environmental gradients. Possible mechanisms driving the self-thinning dynamics include the relative strength of root vs. shoot competition, and the interplay between competition and facilitation. Although these mechanisms often act in concert, their relative importance has not yet been fully explored. We used both a one-layer and a two-layer zone-of-influence (ZOI) model to examine how competition and facilitation drive self-thinning across stress gradients. As a development of the traditional ZOI model, the two-layer version explicitly models shoot and root growth and neighbor interactions, and thus the overall size-symmetry of competition is regulated by the relative strength of root vs. shoot competition. One-layer model simulations revealed that increasingly asymmetric competition accelerated thinning, and steepened (slope ranged from about -1 to -4/3) and lowered self-thinning lines. Stress slowed down density-dependent mortality considerably when competition was not completely symmetric. Stress significantly decreased the self-thinning intercept, while facilitation simply counteracted stress effects. Both stress and facilitation showed little effect on the slope. In the two-layer model, both stress and facilitation affected mortality in the same way as in the one-layer version when competition was not completely symmetric. Different from the one-layer model, the two-layer version showed that the effects of stress and facilitation on the self-thinning slope were mediated by the asymmetry of competition. As stress increased, the overall asymmetry of competition shifted from asymmetric to symmetric due to increased relative strength of root competition. High stress thus dramatically flattened self-thinning lines, whereas the inclusion of facilitation counteracted stress and led to steeper self-thinning lines. Our two-layer model is based on the current knowledge of plant-plant interactions, and better represents ecological realities. It can help elaborate experiments for testing the role of competition and facilitation in driving plant population dynamics.
FIGURE 7. A. Tritubular duct cuticular perimeter thin, B in Rhizoecus colombiensis Ramos & Caballero, a new species of hypogeal mealybug (Hemiptera: Coccomorpha: Rhizoecidae) and a key to the species of Rhizoecus from Colombia
FIGURE 7. A. Tritubular duct cuticular perimeter thin, B. Tubules of tritubular duct thick.
Quantum Dots Array on Ultra-Thin SOI Nanowires with Ferromagnetic Cobalt Barrier Gates for Enhanced Spin Qubit Control
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Tracking Decomposition Layer Formation in Thin-Film Si Electrodes via Thermogalvanic Profiles
<p>This dataset contains the raw data for the publication "Tracking Decomposition Layer Formation in Thin-Film Si Electrodes via Thermogalvanic Profiles" by Hubrechtsen et al, published in Small Methods. The upload includes all data for the original figures presented in the main paper and the supporting information, organized in labelled folders containing raw data and the corresponding figure. </p>
Bandgap Pressure Coefficient of a CH3NH3PbI3 Thin Film Perovskite
<p>This work shows experimental and theoretical studies of the pressure-induced evolution of the electronic structure of the orthogonal phase (OP) of MAPbI3. We have shown that the bandgap of the MAPbI3 in OP can be tuned in a broader range of pressure (≲3.5 GPa) when compared to the tetragonal phase (TP), in which a red-shift of PL peak is observed only up to ∼0.3 GPa. Such behavior results from the better stability of the crystal lattice against octahedral distortions in the low-temperature regime due to the reduced phonon contribution and different Pb−I bond geometry. We found the pressure coefficient of the OP to be negative and dependent on the temperature. A negative deformation potential results from the antibonding character of the bottom of the conduction band and the top of the valence band, while dependence on the temperature can be explained by changes in the unit cell volume and geometry as the atomic configuration approaches the temperature-induced phase transition as well as phonon contribution. On the whole, our results advance the understanding of the behavior of the low-temperature MAPbI3 phase under extreme conditions and show that hydrostatic pressure allows fine-tuning of structural and optical properties, resulting in the possibility of realizing materials with the desired properties for technological applications.</p>
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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.