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986 results for “exchange”
Agreement of multiple night- and daytime filtering approaches of eddy covariance-derived net ecosystem CO2 exchange over a mountain forest. Reproducible workflow.
<p>Datasets and python scripts to reproduce results from the publication <em>Agreement of multiple night- and daytime filtering approaches of eddy covariance-derived net ecosystem CO2 exchange over a mountain forest.</em></p> <p>See README.txt for a description of the single files.</p>
Six years of high-resolution monitoring data of 40 borehole heat exchangers
<p>This dataset provides six years of monitoring data of the ground heat exchanger that supplies heat and cold to the E.ON Energy Research Center located in Aachen, Germany. The data belong to the following publication:</p> <blockquote> <p>Heim, E., Stoffel, P., Müller, D., & Klitzsch, N. (2024). <em>Six years of high-resolution monitoring data of 40 borehole heat exchangers</em>. Scientific Data, 11(1), 1334. <a href="https://doi.org/10.1038/s41597-024-04241-9" rel="nofollow">https://doi.org/10.1038/s41597-024-04241-9</a></p> </blockquote> <p>The ground heat exchanger consists of 40 double-U-loop borehole heat exchangers (BHE), that are arranged in three subfields. Each subfield is connected to an underground vault, in which sensors for the inlet fluid temperature, the outlet fluid temperature and the volume flow of each BHE are placed. The sensors record data in 30-second intervals. Coherent data is provided from July 1, 2018 to June 30, 2024 in two time resolutions and processing levels:</p> <ul> <li><strong>Raw data</strong>: The raw data in its initial resolution, aligned to coherent 30-second timestamps.</li> <li><strong>Prepared data</strong>: The raw data was resampled to 5 minute intervals using the weighted mean, with the volume flow as weight. Moreover, data periods that are not representative of the thermal exchange process in the BHE were masked (e.g., no-flow periods).</li> </ul> <p>Both raw and prepared data are provided as .csv files for each month individually. Temperature measurements are given in °C, the volume flow rate in l/min. </p> <p>In addition, a <strong>supporting file</strong> indicating the BHE locations is provided. It also contains the length of the horizontal connecting pipes going from the underground vaults (where the sensors are placed) to the BHE heads. </p> <p><strong>Code </strong>explaining how to open and work with the data is provided in a separate github repository:<strong> </strong><a href="https://github.com/elimh/ERC_BHEfield_Data_Code">https://github.com/elimh/ERC_BHEfield_Data_Code</a></p>
Tendencia de topics y comunidades activas en Stack Exchange
<p>La plataforma Stack Exchange tiene diferentes foros de diversos temas. En estos dataset los que se busca es recorger las tendencias de los topics y, así, poder evaluar la actividad de las comunidades dentro de este sitio web. Esto nos permite una visión general sobre qué tecnologías y categorías generan más interacción en la plataforma. </p>
Model output of the Simple Biosphere Model, version 4 (SiB4) used in "Evaluation of carbonyl sulfide biosphere exchange in the Simple Biosphere Model (SiB4)"
<p>Model output of the Simple Biosphere Model, version 4 (SiB4) used in "Evaluation of carbonyl sulfide biosphere exchange in the Simple Biosphere Model (SiB4)". The dataset includes COS ecosystem, vegetation and soil fluxes, as well as CO2 exchange fluxes. COS soil fluxes are calculated through the Ogee et al. (2016) soil model, and COS mole fractions vary spatially and temporally. The site-specific files provide SiB4 output only for the plant functional type that is represented by this site. The plant functional type is included in the file name. Datasets include 3 hourly output between 2000-2020 for site simulations, and monthly output between 2000-2020 for global simulations (at 0.5x0.5 degrees). The SiB4 model code is available online: https://gitlab.com/kdhaynes/sib4_corral</p>
THE EFFECT OF CURRENT RATIO, RETURN ON EQUITY, AND DEBT TO EQUITY RATIO ON STOCK RETURNS ON THE INDONESIA STOCK EXCHANGE
<p>This research examined the effect of the Current Ratio, Return on Equity, and Debt to Equity Ratio on Stock Returns in Kompas 100 Companies Listed on the Indonesia Stock Exchange in the 2015-2019 period. The sampling technique used in this study was purposive sampling. The samples obtained were 30 companies from 100 companies. The type of data used in this research is secondary data, and the method of analysis uses multiple linear regression analysis. Based on the data analysis done, the variable Return on Equity has a positive and significant effect on stock returns. The Current Ratio has a negative and insignificant effect on stock returns, and the Debt to Equity Ratio has a negative and insignificant effect on stock returns. The current ratio, return on equity, and debt to equity ratio simultaneously does not affect stock returns.</p>
High Oxygen Exchange Activity of Pristine La0.6Sr0.4FeO3–δ Films and Its Degradation - Dataset
<p>LSF thin film electrodes on YSZ substrates were characterized by electrochemical impedance spectrocopy inside the pulsed laser deposition chamber and in ex-situ emasurement setups. Inside the deposition chamber (in-situ) these electrodes revealed drastically lower polarization resistances. Exposure to several potential degradation sources inside the chamber showed this to be a rather robust effect. A detaield description is available in: https://doi.org/10.1149/1945-7111/abac2b</p> <p>This dataset includes the measured impedance spectra. The directory structure represents the order in which the se spectra appear in the publication. Several spectra are discussed in the context of several effects (e.g pO2 dependency and time dependency). In such cases, they are (redundantly) included in both relevant subdirectories.</p>
16S processed data and shell processing scripts for "Epithelial-myeloid exchange of MHCII constrains immunity and microbiota composition"
<p>Main repo for MHCII on IECs 16S processing code.</p>
List of exchange rate of andorra
<p>The dataset contains the monetary rates of the currencies per any given month admitted by the Government of Andorra.</p>
Combined heat exchanger reactors for conducting simultaneous endothermic and exothermic reactions
<p><strong>Combined heat exchanger reactors for conducting simultaneous endothermic and exothermic reactions</strong></p> <p>Junjie Chen</p> <p>Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com</p> <p> </p> <p>It has been described a process to generate a hydrogen rich gas by generating a catalytic film which is composed of layers of different catalysts. It is proposed that steam reforming of a hydrocarbon be performed by one layer and the energy for this process be supplied by a hydrocarbon oxidative process being promoted in the subsequent layer. Various hybrids of this theme are proposed. However, as the heat is supplied by an autothermal reaction, oxygen must be supplied along with the fuel stream. As well as the oxygen, associated nitrogen is present. This nitrogen acts to absorb process energy which lowers the thermal efficiency of the process as well as diluting the desired product, hydrogen. The presence of the nitrogen increases the load on downstream partial oxidation units which act to oxidize carbon monoxide to carbon dioxide. The nitrogen also reduces the streams suitability for use in fuel cells. Therefore, a reactor which can supply sufficient energy to an endothermic reaction without mixing the streams is needed. It has been described a method where parallel and discrete channels can be formed by stacking suitable plates to form a structure. The plates are then bonded together using brazing, welding or diffusion bonding techniques. It is also claimed that cast ceramic plates can be used with a suitable sealing mechanism. Catalyst can be adhered onto the wall and energy supplied or removed via conduction between subsequent channels. However, the design does not allow for catalyst replenishment nor precious metal recovery. Therefore, a reactor which affords an easy and cheap method for catalyst replacement and replenishment is required.</p> <p>Streamwise distance (meters), Heat flux (watts per square meter)</p> <p>0 28543.2</p> <p>0.00025 147840</p> <p>0.0005 130560</p> <p>0.00075 136832</p> <p>0.001 76061.5</p> <p>0.00125 4012.44</p> <p>0.0015 6787.19</p> <p>0.00175 9091.13</p> <p>0.002 70670.9</p> <p>0.00225 107776</p> <p>0.0025 78720</p> <p>0.00275 75904</p> <p>0.003 39811.2</p> <p>0.00325 1654.75</p> <p>0.0035 2917.25</p> <p>0.00375 4164.75</p> <p>0.004 50131</p> <p>0.00425 77568</p> <p>0.0045 55552</p> <p>0.00475 53248</p> <p>0.005 27844.7</p> <p>0.00525 1018.19</p> <p>0.0055 1766.44</p> <p>0.00575 2553.25</p> <p>0.006 36808.2</p> <p>0.00625 58240</p> <p>0.0065 43264</p> <p>0.00675 43136</p> <p>0.007 23029</p> <p>0.00725 728.5</p> <p>0.0075 1212.56</p> <p>0.00775 1734.25</p> <p>0.008 27885.2</p> <p>0.00825 45056</p> <p>0.0085 34944</p> <p>0.00875 37120</p> <p>0.009 20554</p> <p>0.00925 566.687</p> <p>0.0095 893.187</p> <p>0.00975 1261.12</p> <p>0.01 22236.7</p> <p>0.01025 36992</p> <p>0.0105 30464</p> <p>0.01075 33920</p> <p>0.011 19118</p> <p>0.01125 463.125</p> <p>0.0115 683.938</p> <p>0.01175 966.625</p> <p>0.012 18747.8</p> <p>0.01225 31872</p> <p>0.0125 27136</p> <p>0.01275 31232</p> <p>0.013 17946</p> <p>0.01325 392.437</p> <p>0.0135 547.312</p> <p>0.01375 772.062</p> <p>0.014 16463.2</p> <p>0.01425 28544</p> <p>0.0145 25088</p> <p>0.01475 29568</p> <p>0.015 17164.1</p> <p>0.01525 343.563</p> <p>0.0155 452.563</p> <p>0.01575 637.126</p> <p>0.016 14980</p> <p>0.01625 26240</p> <p>0.0165 23296</p> <p>0.01675 27776</p> <p>0.017 16257.6</p> <p>0.01725 307.437</p> <p>0.0175 385.437</p> <p>0.01775 541.563</p> <p>0.018 13518</p> <p>0.01825 24064</p> <p>0.0185 21888</p> <p>0.01875 26240</p> <p>0.019 15353.1</p> <p>0.01925 280.813</p> <p>0.0195 340.375</p> <p>0.01975 476.688</p> <p>0.02 12456</p> <p>0.02025 22144</p> <p>0.0205 20352</p> <p>0.02075 24832</p> <p>0.021 14579.9</p> <p>0.02125 263.812</p> <p>0.0215 312.5</p> <p>0.02175 433.625</p> <p>0.022 11277.1</p> <p>0.02225 20480</p> <p>0.0225 19072</p> <p>0.02275 23296</p> <p>0.023 13807.9</p> <p>0.02325 251.563</p> <p>0.0235 294.875</p> <p>0.02375 404.437</p> <p>0.024 10105.3</p> <p>0.02425 18432</p> <p>0.0245 17152</p> <p>0.02475 20864</p> <p>0.025 12394.4</p> <p>0.02525 236.813</p> <p>0.0255 276.937</p> <p>0.02575 375.75</p> <p>0.026 8677.24</p> <p>0.02625 15744</p> <p>0.0265 14592</p> <p>0.02675 17792</p> <p>0.027 10592.6</p> <p>0.02725 213.125</p> <p>0.0275 249.625</p> <p>0.02775 335.938</p> <p>0.028 7370.84</p> <p>0.02825 13184</p> <p>0.0285 11648</p> <p>0.02875 13312</p> <p>0.029 7754.35</p> <p>0.02925 167.812</p> <p>0.0295 212.062</p> <p>0.02975 190.063</p> <p>0.03 25.6936</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p>
Dataset supporting publication: "Development and Validation of Analytical Solutions for Earth Basket (Spiral) Heat Exchangers"
<p>Dataset supporting publication: “Development and Validation of Analytical Solutions for Earth Basket (Spiral) Heat Exchangers” (publication available for download:<a href="https://zenodo.org/record/7274096#.Y2JpLnbMJPY">GEOFIT Zenodo</a>).</p> <p>This paper presents an analytical solution and its validation for earth basket (vertical spiral) ground heat<br> exchangers. The model, based on the well known Finite Line Source Equation, accounts for the heat exchanger pipe diameter and seasonally varying near surface temperature. For computational efficiency the standard approach of using G-functions has been implemented as well. The analytical model is validated based on laboratory experiments and extensive CFD analysis.</p>
Isotopic evidence for increased carbon and nitrogen exchanges between peatland plants and their symbiotic microbes with rising atmospheric CO2 concentrations since 15000 cal. yr BP
<p>Whether nitrogen (N) availability will limit plant growth and removal of atmospheric CO<sub>2</sub> this century is controversial. Studies have suggested that N could progressively limit plant growth, as trees and soils accumulate N in slowly cycling biomass pools in response to increases in carbon sequestration. However, a question remains over the longer-term (decadal to century) feedbacks between climate, CO<sub>2</sub> and plant N uptake. The symbiosis between plants and microbes can help plants with mycorrhizal N uptake or biological N2 fixation – the pathway through which N can be rapidly brought into ecosystems and thereby partially or completely alleviate N limitation on plant productivity. Here we present results for plant N isotope composition (δ<sup>15</sup>N) in a peat core that dates to 15000 cal. yr BP to ascertain ecosystem-level N cycling responses to rising atmospheric CO<sub>2</sub> concentrations in the past. We found that an increase in atmospheric CO<sub>2</sub> concentration happened with a decrease in δ<sup>15</sup>N values of both <em>Sphagnum</em> moss and Ericaceae over this time period when constrained for climatic factors. A modern experiment demonstrated that δ<sup>15</sup>N of <em>Sphagnum</em> mosses decreased with increasing N2 fixation rates. These findings suggested that N2 fixation in <em>Sphagnum</em> moss by symbiosis with cyanobacteria and N uptake in Ericaceae by symbiosis with mycorrhizal fungi both likely increased with rising atmospheric CO<sub>2</sub> concentrations, highlighting a longer-term feedback mechanism whereby N constraints on terrestrial carbon storage can be overcome. </p>
Two Multilingual Students in Tandem Language Exchange
<p>Data from research on two multilingual students in a languahe tandem course: two interviews, two final reflections and two tandem learning diaries.</p>
Exploring Soil Exchangeable Cations and Auditing the Potential of Phoenix dactylifera and Mangifera indica in CO2 Sequestration into Soil Biomass in a Naturally Occurring Tree Patches Using Infrared Gas Analyzer
<p><em>Soil Exchangeable Cations (EC) were audited, and the potential of economic trees in atmospheric CO2 sequestration into soil biomass was investigated. . The experiment indicated that economic trees are perfect for CO2 sequestration. </em></p>
Strong lateral exchange coupling and current-induced switching in single-layer ferrimagnetic films with patterned compensation temperature
<p>Open data for "Strong lateral exchange coupling and current-induced switching in single-layer ferrimagnetic films with patterned compensation temperature"</p>
Investigating the Point of View of Project Management Practitioners on Technical Debt - A Study on Stack Exchange
<p>Investigating the Point of View of Project Management Practitioners on Technical Debt - A Study on Stack Exchange.</p> <p>Journal of Software Engineering Research and Development (JSERD) 2023.</p> <p> </p>
Single stage exchange for PJI of the hip
<p>This video illustrates our surgical technique for single stage exchange for periprosthetic joint infection of the hip.</p>
Sunda-Sahul floristic exchange and pathways into the Southwest Pacific: New insights from wet tropical forest trees
<p><strong>Aim</strong> Recent investigations on the floristic exchange between Southeast Asia and Australia have shown a clear dispersal directionality bias (West to East) of wet-adapted plant taxa. However, dispersal routes and directions of wet forest taxa into the South Pacific remain insufficiently known. We here aimed to establish the most likely routes and directions of plant dispersal into the Southwest Pacific islands.</p> <p><strong>Location</strong> Southeast Asia, East Asia, Australia, Southwest Pacific.</p> <p><strong>Taxon</strong> <em>Dysoxylum</em> s.l. (Meliaceae). This includes <em>Dysoxylum</em> s.s., <em>Didymocheton</em>, <em>Epicharis</em>, <em>Goniocheton</em>, <em>Pseudocarapa</em> and <em>Prasoxylon</em>.</p> <p><strong>Method</strong> We sampled 75% of the species diversity in <em>Dysoxylum</em> s.l., covering the entire distribution range, all genera and major lineages. Phylogenetic relationships of 149 accessions were reconstructed using Bayesian Evolutionary Analysis and two internal constraints. The dispersal–extinction–cladogenesis variant, founder-event speciation (DEC+J), was used for reconstructing the biogeographic history, and 100 BSMs were simulated.</p> <p><strong>Results</strong> <em>Dysoxylum</em> s.l. originated and firstly diversified in the western part of its current distribution range (incl. Indochina) during the Miocene to Pliocene, followed by an overall eastern range expansion towards Malesia, Australia and the Southwest Pacific in the Pliocene.</p> <p><strong>Main</strong> <strong>conclusions</strong> The south-eastward expansion of lineages into Wallacea and Australia is in temporal agreement with the convergence of the Asian and Australian tectonic plates since the Miocene. Long-distance dispersal is the main mechanism that led to the current distribution. Two dispersal pathways into the Southwest Pacific are identified, (1) through New Guinea and the Solomon Islands to Fiji, and (2) from New Zealand to Fiji. For both routes, Fiji was an important secondary source area for dispersal into the Southwest Pacific.</p>
Resources for "Disaggregating the carbon exchange of degrading permafrost peatlands using Bayesian deep learning"
<p>This dataset contains all predictors, fluxes, and footprint weights used and described in our manuscript.</p>
La and Mn-doped cobalt spinel oxygen evolution catalyst for proton exchange membrane electrolysis
<p>Finding electrocatalysts using earth-abundant materials as a replacement to iridium for oxygen-evolution reaction (OER) in proton exchange membrane water electrolyzer (PEMWE) represents a critical step in reducing the cost for green hydrogen production. We report here a nanofibrous cobalt spinel catalyst co-doped with lanthanum and manganese prepared from zeolitic imidazolate framework embedded in electrospun polymer fiber. The catalyst demonstrated a low overpotential of 353 millivolts at 10 milliamperes per square centimeter and a low degradation for OER over 360 hours in acidic electrolyte. PEMWE containing this catalyst at anode demonstrated a current density of 2000 milliamperes per square centimeter at 2.47 volts (Nafion® 115 membrane) or 4000 milliamperes per square centimeter at 3.00 volt (Nafion® 212 membrane), and low degradation in accelerated-stress-test. High-resolution electronic microscopy and operando X-ray absorption spectroscopy, combined with computational modeling, revealed the different functions of lanthanum, manganese, and cobalt in enabling enhanced activity, conductivity and acidic tolerance within the OER operating window.</p>
Basis Set Exchange - Formatted Basis Sets
<p>This dataset contains all the basis sets in the Basis Set Exchange in all the available formats</p>
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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.