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986 results for “exchange”
The role of OCO-3 XCO2 retrievals in estimating global terrestrial net ecosystem exchanges
<p>1.<strong>Exp_OCO3.zip </strong> includes regional posterior carbon fluxes from the assimilation using OCO-3 observations.</p> <p>2.<strong>Exp_OCO2.zip </strong> includes regional posterior carbon fluxes from the assimilation using OCO-2 observations.</p> <p>3.<strong>Exp_OCO3&2.zip </strong> includes regional posterior carbon fluxes from the joint assimilation using OCO-3 and OCO-2 observations together.</p> <p>4.<strong>posterior.fluxes.Exp_OCO3.nc </strong>includes information on the spatial distribution of annual as well as monthly posterior carbon fluxes from the assimilation using OCO-3 observations during August 2019 to December 2022.</p> <p>5.<strong>posterior.fluxes.Exp_OCO2.nc </strong>includes information on the spatial distribution of annual as well as monthly posterior carbon fluxes from the assimilation using OCO-2 observations during August 2019 to December 2022.</p> <p>6.<strong>posterior.fluxes.Exp_OCO3&2.nc </strong>includes information on the spatial distribution of annual as well as monthly posterior carbon fluxes from the joint assimilation using OCO-3 and OCO-2 observations together during August 2019 to December 2022.</p> <p>7.<strong>evaluation_result.txt</strong> includes the results of the evaluation of posterior carbon fluxes using independent CO2 observations from 66 surface flask sites.</p> <p> </p> <p> </p> <p> </p>
Data set related to the manuscript "Investigating the effect of particle size distribution and complex exchange dynamics on NMR spectra of ions diffusing in disordered porous carbons through a mesoscopic model"
<p>Graphical files in the agr format for all the figures in the manuscript entitled "Investigating the effect of particle size distribution and complex exchange dynamics on NMR spectra of ions diffusing in disordered porous carbons through a mesoscopic model". XYZ files giving the particles and bulk positions in the lattices are also provided.</p>
Data for the article "Stabilizing perpendicular magnetic anisotropy with strong exchange bias in PtMn/Co by magneto-ionics"
<p>Dataset for the article:</p> <p>B. Bednarz et al., “Stabilizing perpendicular magnetic anisotropy with strong exchange bias in PtMn/Co by magneto-ionics,” <em>Appl. Phys. Lett.</em> 124, 232403 (2024).</p> <div> <div><a href="https://doi.org/10.1063/5.0213731" target="_blank" rel="noopener">https://doi.org/10.1063/5.0213731</a></div> </div>
Assessing exchange-correlation functionals for heterogeneous catalysis of nitrogen species: VASP input and output
<p>This contains all VASP data used in the paper titled "Assessing exchange-correlation functionals for heterogeneous catalysis of nitrogen species".</p> <p>Please read README.md file for the description of each file.</p> <p>Author list: Honghui Kim, Neung-Kyung Yu, Nianhan Tian, and Andrew J. Medford*<br>arxiv:<a href="https://arxiv.org/abs/2403.14482"> https://arxiv.org/abs/2403.14482</a></p>
Data from: Leaf morphological traits show greater responses to changes in climate than leaf physiological traits and gas exchange variables
<p>Adaptation to changing conditions is one of the strategies plants use to survive climate change. Here, we ask whether plants' leaf morphological and physiological traits/gas exchange variables have changed in response to recent, anthropogenic climate change. We grew seedlings from resurrected historic seeds from <em>ex-situ </em>seed banks and paired modern seeds in a common-garden experiment. Species pairs were collected from regions that had undergone differing levels of climate change using an emerging framework – Climate Contrast Resurrection Ecology, allowing us to hypothesise that regions with greater changes in climate (including temperature, precipitation, climate variability and climatic extremes) there would be greater trait responses in leaf morphology and physiology over time. Our found that in regions where there were greater changes in climate, there were greater changes in average leaf area, leaf margin complexity, leaf thickness and leaf intrinsic water use efficiency. Changes in leaf roundness, photosynthetic rate, stomatal density and the leaf economic strategy of our species were not correlated with changes in the climate. Our results show that leaves do have the ability to respond to changes in climate, however, there are greater inherited responses in morphological leaf traits than in physiological traits/variables, and greater responses to extreme measures of climate than gradual changes in climatic means. It is vital for accurate predictions of species' responses to impending climate change to ensure that future climate change ecology studies utilise knowledge about the difference in both leaf trait and gas exchange responses, and the climate variables that they respond to.</p>
Seasonal precipitation distribution determines ecosystem CO₂ and H₂O exchange by regulating spring soil water-salt dynamics in a brackish wetland
<p>The intensification of the global hydrological cycle is anticipated to increase the variability of precipitation patterns. Brackish wetlands respond to changes in precipitation patterns by regulating the absorption and release of CO<sub>2</sub> and H<sub>2</sub>O to maintain the stability of ecosystem functions. However, there is limited understanding of how the inter-seasonal precipitation distribution affects ecosystem CO<sub>2</sub> and H<sub>2</sub>O exchange compared to annual precipitation totals. Here, we conducted four consecutive years of field experiments in a brackish wetland, manipulating the proportion of precipitation across different seasons while maintaining a constant annual precipitation total. We utilized five inter-seasonal precipitation distribution proportions (+73%, +56%, control (CK), -56%, and -73%) to examine the effects of seasonal precipitation distribution (SPD) on ecosystem CO<sub>2</sub> and H<sub>2</sub>O exchange. Our findings revealed that the ecosystem CO<sub>2</sub> and H<sub>2</sub>O fluxes showed a trend of decreasing with the decrease of spring precipitation distribution. Among them, the annual net ecosystem CO<sub>2 </sub>exchange (NEE), evapotranspiration (ET), carbon use efficiency (CUE), and water use efficiency (WUE) were shown to be more sensitive to decrease in spring precipitation distribution and increase in summer and autumn precipitation distribution. This negative asymmetric response pattern suggests that annual ecosystem CO<sub>2</sub> and H<sub>2</sub>O exchange is primarily governed by seasonal precipitation variability, with spring soil water-salt dynamics identified as the key driver. Therefore, this association can be explained by the fact that drought of the early growth stage exacerbates soil salinization and inhibits vegetation colonization and growth, thereby greatly impairing the annual CO<sub>2</sub>-H<sub>2</sub>O exchange capacity of brackish wetlands. Our results emphasized that the spring's extreme precipitation-induced soil water-salt conditions will greatly influence CO<sub>2</sub> and H<sub>2</sub>O exchange in brackish wetlands in the future. These findings are crucial for improving predictions of the carbon sequestration and water-holding capacity of brackish wetlands.</p>
Dataset for Interannual and seasonal variability of the air-sea CO2 exchange at Utö in the coastal region of the Baltic Sea
<p>Uto Atmospheric and Marine Research Station<br>Finnish Meteorological Institute and Finnish Environment Institute</p> <p>Data Jan 2017 - Dec 2021</p> <p> </p> <p>Data used in:<br>Honkanen, M., Aurela, M., Hatakka, J., Haraguchi, L., <br>Kielosto, S., Mäkelä, T., Seppälä, J., Siiriä, S.-M., <br>Stenbäck, K., Tuovinen, J.-P., Ylöstalo, P., and Laakso, L.: <br>Interannual and seasonal variability of the air-sea CO2 exchange at Utö in the coastal region of the Baltic Sea, <br>EGUsphere [preprint], https://doi.org/10.5194/egusphere-2024-628, 2024.</p> <p> </p> <p>This research has been supported by the Research Council of Finland project SEASINK (Evolving carbon sinks and sources in coastal<br>seas – will ecosystem response temper or aggravate climate change? project nos. 317297 and 317298), and the JERICO-NEXT and JERICO-S3 projects which have received funding from the European Union Horizon 2020 Research and Innovation Program under grant agreement nos. 654410 and 871153, respectively.</p>
EAHE-D: a Dataset for Modeling and Performance Evaluation of Earth to Air Heat Exchangers
<p><strong>The dataset is available in its original form, allowing users to perform data preprocessing according to their specific needs. Additionally, we offer a processed version of the dataset, which can be used to further investigate the effectiveness of EAHE deployment in buildings and its integration with other passive and active systems, aiming to enhance energy efficiency while maintaining occupant comfort.</strong></p>
Integrating diffusion dialysis for sustainable acid recovery from ion exchange regeneration stages: Characterization of metal and non-metal ions migration
<p>Seawater mining presents a potential option for recovering the European Union’s Critical Raw Materials (CRMs), but direct extraction from seawater is challenging due to their low concentrations, as most of them are Trace Elements (TEs) (at levels of mg/L or μg/L). Saltworks <em>bitterns </em>(ultraconcentrated brines resulting from the sea salt production process) offer an alternative solution, naturally concentrated up to 40 times more than seawater. These bitterns can be further processed with chelating Ion Exchange (IX) sorbents to selectively extract TEs. However, this process requires an acidic elution stage with strong acids, followed by neutralization, to recover TEs through precipitation, demanding extensive chemicals consumption. Diffusion Dialysis (DD) could be used to recover the excess acid without external reagents, using an acid-resistant Anion Exchange Membrane (AEM). This study evaluates DD through batch and once-through tests for acid recovery from simulated IX eluate generated in the elution stage of TEs (B, Ga, Ge, Co, Sr) recovery from saltworks bitterns.<br>Batch tests achieved high recoveries for HCl (45–50 %) and H2SO4 (30–37 %), being the theoretical maximum attainable recovery equal to 50 %. B and Ge only partially permeated through the membrane (82 % rejection) by a diffusion mechanism in their neutral form (H3BO3(aq), H4GeO4(aq)). Ga, Co and Sr, in cationic form, were highly rejected (>96 %). Permeability followed the order Ga < Sr < Co ≪ Ge < B, due to the relevant charge and size. HCl permeability correlated linearly with concentration, while H2SO4 was inversely proportional. Once-through tests showed higher acid (74 % HCl, 62 % H2SO4) and oxoacid (66 % H3BO3(aq), 52 % H4GeO4(aq)) recovery at a low specific flow rate, or apparent flux, (0.38 L/(m^2⋅h)) due to increased residence time. Water to acid flow rate ratios did not affect species transport when an excess of water was guaranteed. Conversely, an influence was observed when the ratio was below 1, with a minimum at 0.18, where a very low passage of species was observed due to the reduced dilution volume of the dialysate solution (water). A 1D transport model, incorporating the solutes permeabilities determined experimentally, effectively described the system performance, especially for HCl and B, albeit slightly overestimating the other TEs’ transport.</p>
Data output for: Climate change stimulated agricultural innovation and exchange across Asia, in review.
<p>The GitHub repository for this project does not contain the output<br> generated by the script—3.2 GB of compressed data. All output data is<br> available as this Zenodo archive.</p> <p>The `vignettes/` directory contains all data generated by the<br> `guedesbocinsky2018.Rmd` RMarkdown vignette:</p> <p> - `data/raw_data` contains data downloaded from web sources for this<br> analysis<br> - `data/derived_data/` contains tables of the raw site chronometric<br> data without locational information, and the modeled chronometric<br> probability and niche information for each site.<br> - `data/derived_data/models/` contains R data objects describing the<br> Kriging interpolation models across the study area<br> - `data/derived_data/recons/` contains NetCDF format raster bricks of<br> the model output (i.e., the reconstructed crop niches)<br> - `figures/` contains all figures output by the script, including<br> videos of how each crop niche changes over time<br> - `figures/site_densities/` contains figures of the estimated<br> chronometric probability density for each site in our database<br> - `submission/` contains all of the figures, tables, movies, and<br> supplemental datasets included with d’Alpoim Guedes and Bocinsky<br> (2018)</p>
Data for "STOCK EXCHANGE LISTING INDUCES SOPHISTICATION OF CAPITAL BUDGETING"
<p>This data support the following research: This article compares capital budgeting techniques employed in listed and unlisted companies in Brazil. We surveyed the Chief Financial Officers (CFOs) of 398 listed companies and 300 large unlisted companies, and based on 91 respondents, the results suggest that the CFOs of listed companies tend to use less simplistic methods more often, for example: NPV and CAPM, and that CFOs of unlisted companies are less likely to estimate the cost of equity, despite being large companies. These findings indicate that stock exchange listing may require greater sophistication of the capital budgeting process.</p>
Raw diffraction images of H+/Ca2+ exchanger CAX (phasing data by Hg-MAD)
<p>Diffraction images of mercury-bound H<sup>+</sup>/Ca<sup>2+</sup> exchanger from <em>Archaeoglobus fulgidus</em>. This phase information was used for a PDB entry <a href="https://www.rcsb.org/structure/4KPP">4KPP</a> (<a href="http://science.sciencemag.org/content/341/6142/168">Nishizawa et al. 2013</a>). All data were collected from loop-harvested crystals on BL32XU, SPring-8 at wavelengths of 1.00000 Å (peak), 1.00930 Å (edge), or 1.01300 Å (low remote) using the MX225HE CCD detector.</p> <p>From a mercury-derivatised crystal, helical (360°/crystal, 1°/frame) datasets were collected using 5×1 μm<sup>2</sup> beam. The crystal belonged to space group <em>P</em>2<sub>1</sub> with unit cell parameter a~64, b~98, c~72 Å, β~99°.</p>
Numerical model code, input files and output data for publication "Rapid mixing and exchange of deep-ocean waters in an abyssal boundary current"
<p>Contains numerical model data (code, input files, selected output, matlab diagnostic routines) to supplement publication ``Rapid mixing and exchange of deep-ocean waters in an abyssal boundary current'', by Naveiro Garabato and co-authors. All numerical model data, including any errors, is the responsibility of Sonya Legg. This data set will allow reproduction of simulations, and reproduction of diagnostics shown in plots in the above-referenced paper.</p>
High performance cation exchange membranes synthesized via in-situ emulsion polymerization without organic solvents and corrosive acids
<p>Dataset supporting journal publication:</p> <p><strong>Abstract:</strong> The synthesis of cation exchange membranes (CEMs) usually involves using organic solvents and/or sulfonation process. In this study, green and scalable synthesis of high performance CEMs is achieved without organic solvents and sulfonation. The synthesis is carried out via in-situ polymerization of lithium styrene sulfonate in porous support. Different preparation procedures are developed and optimized. Functional sulfonate groups were successfully loaded onto and into the membrane support, as verified by FTIR. Besides, water plays an important role during membrane synthesis. By reducing the amount of water used, the ratio of functional polymers to membrane support in the synthesized CEMs is increased. Therefore, the synthesized CEMs show increased ion exchange capacity (IEC). This is significant because it means that high IEC can be achieved without introducing cation exchange resins to the membranes. Finally, the synthesized membranes demonstrate high desalination performance. This new methodology may shed new light on preparing CEMs in an efficient and eco-friendly way.</p>
The dynamics of bi-directional exchange flows: implication for morphodynamic change within estuaries and sea straits
<p>Environmental and geophysical flows, including dense bottom gravity currents in the ocean and buoyancy-driven exchange flows in marginal seas,<br> are strongly controlled by topographic features.<br> These are known to exert significant influence on both internal mixing and secondary circulations generated by these flows.<br> In such cases, uni-directional or bi-directional exchange flows develop when horizontal density differences<br> and/or pressure gradients are present between adjacent water bodies connected by a submerged channel.<br> The flow dynamics of the dense lower layer depend primarily on the volumetric flux and channel cross-sectional shape,<br> while the stratified interfacial flow mixing characteristics, leading to fluid entrainment/detrainment,<br> are also dependent on the buoyancy flux and motion within the upper (lower density) water mass.<br> For submerged channels that are relatively wide compared to the internal Rossby radius of deformation,<br> Earth rotation effects introduce geostrophic adjustment of these internal fluid motions,<br> which can suppress turbulent mixing generated at the interface and result in the development of Ekman layers that induce secondary,<br> cross-channel circulations, even within straight channels.<br> Moreover, recent studies of dense, gravity currents generated in rotating and non-rotating systems,<br> respectively, indicated that the V-shaped channel topography had a strong influence on both flow distribution<br> and associated interfacial mixing characteristics along the channel.<br> However, such topographic controls on the interfacial mixing and secondary circulations generated by bi-directional exchange flows<br> are not yet fully understood and remain to be investigated thoroughly in the laboratory.<br> Also the effect of mobile bed for bi-directional exchange flows generated in deformable channels along with the physical interactions<br> between the lower dense water flow and the erodible bed sediments<br> will have a strong influence in (re-)shaping the overall channel bed topography (i.e. bed morphodynamics).<br> Consequently, the resulting temporal changes in cross-sectional channel bathymetry (i.e. through erosion and deposition processes)<br> would also be expected to have associated feedbacks on transverse asymmetries in the bi-directional exchange flow structure,<br> as well as on the internal flow stability.</p>
Charge Exchange Cross sections for He+, Ne+, Ar+, Kr+ on N2 from 0.3 - 5.0 keV
<p>Energy resolved absolute charge exchange cross sections for He+, Ne+, Ar+, Kr+ incident on N2 from 0.3 - 5.0 keV.</p>
Data Supporting "Air-Sea Momentum Exchange with Explicit Wind-Wave-Current Coupling and Effects on Hurricane Structure and Impacts"
<p>This dataset produced the figures for the Air-Sea Momentum Exchange with Explicit Wind-Wave-Current Coupling and Effects on Hurricane Structure and Impacts Manusrcipt.</p>
Research data for the paper: Adsorption Desalination and Cation Exchange of NaCl and CaCl2-water solutions in LTA zeolites
<p>Adsorption isotherms data of water in LTA zeolites (LTA_Si, NaLTA, CaLTA and NaCaLTA) with 0 Salt, 7 molecs/uc NaCl, 21 molecs/uc NaCl, 7 molecs/uc CaCl2, 21 molecs/uc CaCl2.</p> <p>Water adsorption data in MFI zeolite for force field validation</p> <p>Raw data of Radial Distribution Functions (RDFs) in NaLTA (LTA4A), NaCaLTA (LTA5A), CaLTA (LTACa), distances between structure (Oa), extra framework cations (NaCAT, CaCAT), salt cation (Na, Ca), and water (Ospce)</p> <p> </p>
Analysis of Determining the Location of Public Electric Battery Exchange Stations (SPBKLU) using The Buffer Method in The Geographical Information System (GIS) in The Central Jakarta Region (Case Study of PT. XYZ)
<p>Figure 1. The Existing Station Map in the Central Jakarta Area</p> <p><strong><span>Figure 2.</span></strong><span> The Suitability of Battery Replacement Station Location and Closeness to Alfamart Supermarket </span></p> <p><strong><span>Figure 3.</span></strong><span> The Suitability of Battery Replacement Station Location and Closeness to District Office </span></p> <p><strong><span>Figure 4.</span></strong><span> The Suitability of Battery Replacement Station Location in the Central Jakarta Area</span></p> <p><span>Data (The Variable Weight & The Variable Criteria)</span></p>
Tau accelerates tubulin exchange in the microtubule lattice
<p>This dataset contains the data and source code for Figures 1-4 and and the source code for Supplementary Figures S5-S10 from the following publication: </p> <div> <p>Tau accelerates tubulin exchange in the microtubule lattice</p> </div> <div>by</div> <div> </div> <div>Subham Biswas, Rahul Grover, Cordula Reuther, Chetan S. Poojari, M. Reza Shaebani, Mona Grünewald, Amir Zablotsky, Jochen S. Hub, Stefan Diez, Karin John, Laura Schaedel</div> <div> </div> <div>doi: https://doi.org/10.1101/2024.10.05.616777</div>
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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.