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5,371 results for “Flow”
Monitoring the Evolution of Asynchrony between Mean Arterial Pressure and Mean Cerebral Blood Flow via Cross-Entropy Methods
<p>Porta A, Gelpi F, Bari V, Cairo B, De Maria B, Panzetti CM, Cornara N, Bertoldo EG, Fiolo V, Callus E, De Vincentiis C, Volpe M, Molfetta R, Pistuddi V, Ranucci M. Monitoring the Evolution of Asynchrony between Mean Arterial Pressure and Mean Cerebral Blood Flow via Cross-Entropy Methods. Entropy (Basel). 2022 Jan 2;24(1):80. doi: 10.3390/e24010080. PMID: 35052106; PMCID: PMC8774596.</p> <p>Abstract</p> <p>Cerebrovascular control is carried out by multiple nonlinear mechanisms imposing a certain degree of coupling between mean arterial pressure (MAP) and mean cerebral blood flow (MCBF). We explored the ability of two nonlinear tools in the information domain, namely cross-approximate entropy (CApEn) and cross-sample entropy (CSampEn), to assess the degree of asynchrony between the spontaneous fluctuations of MAP and MCBF. CApEn and CSampEn were computed as a function of the translation time. The analysis was carried out in 23 subjects undergoing recordings at rest in supine position (REST) and during active standing (STAND), before and after surgical aortic valve replacement (SAVR). We found that at REST the degree of asynchrony raised, and the rate of increase in asynchrony with the translation time decreased after SAVR. These results are likely the consequence of the limited variability of MAP observed after surgery at REST, more than the consequence of a modified cerebrovascular control, given that the observed differences disappeared during STAND. CApEn and CSampEn can be utilized fruitfully in the context of the evaluation of cerebrovascular control via the noninvasive acquisition of the spontaneous MAP and MCBF variability.</p>
In vitro four-dimensional flow magnetic resonance analysis of the effect of pericardial valve design on aortic flow
<p>Tasca G, Sturla F, Jaworek M, Giese D, Menicanti L, Vismara R, Lombardi M, Redaelli A. <em>In vitro</em> four-dimensional flow magnetic resonance analysis of the effect of pericardial valve design on aortic flow. J Med Eng Technol. 2022 Apr;46(3):209-219. doi: 10.1080/03091902.2022.2026505. Epub 2022 Jan 21. PMID: 35060819.</p> <p>Abstract</p> <p>We investigated the effect of the design of bioprosthetic pericardial valves on the downstream fluid flow pattern through four-dimensional flow magnetic resonance imaging (4D Flow). A dedicated <em>in vitro</em> test bench, including a paradigmatic aortic root phantom, was used to compare, under steady flow conditions, three commercially used pericardial bioprostheses (Trifecta<sup>TM</sup>, Carpentier-Edwards PERIMOUNT Magna, Crown PRT®), selecting the two smallest and comparable valve sizes. In-house 4D Flow post-processing provided the downstream flow pattern of velocity, the velocity profile at vena contracta, its effective orifice area (EOA) and the corresponding hydraulic diameter (D<sub>H</sub>). Trifecta reported the lowest peak of velocity for both the tested sizes, with vena contracta position being the most proximal to the free margin of leaflets. Conversely, in both Crown and Magna, jet flow continued to increase its downstream velocity, resulting in a farther position of vena contracta. EOA shape was trilobal for Magna, triangular for Crown and circular for Trifecta, the last one maximising EOA. The percentage of nominal luminal area effectively exploited by the flow was largely above 80% in Trifecta, below 75% in Crown and below 70% in Magna. Hence, the design of pericardial bioprostheses directly impacts on the downstream flow field pattern and its fluid dynamic performance.</p>
Data_Influence of flow and pressure distribution inside a gas diffusion electrode on the performance of a flow-by CO2 electrolyzer
<p>The folder contains the processed data of figures 3, 4, 6, 7, 8, 10, S1 and S2 that appear in:</p> <p>Bert De Mot, Jonas Hereijgers, Miguel Duarte, Tom Breugelmans, Influence of flow and pressure distribution inside a gas diffusion electrode on the performance of a flow-by CO2 electrolyzer, Chemical Engineering Journal, Volume 378, 2019, 122224, ISSN 1385-8947, https://doi.org/10.1016/j.cej.2019.122224.</p>
Data_The bromine mediated electrosynthesis from ethylene to ethylene oxide in continuous flow-through operation
<p>The folder contains the processed data of figures 5, 6, 7, 8, 9, 12, S.1, S.3 and S.4 that appear in:</p> <p>J.Schalck, J. Hereijgers, W. Guffens, T. Breugelmans, The bromine mediated electrosynthesis from ethylene to ethylene oxide in continuous flow-through operation, <a href="https://www.sciencedirect.com/journal/chemical-engineering-journal/vol/446/part/P2">Volume 446, Part 2</a>, 15 October 2022, 136750, https://doi.org/10.1016/j.cej.2022.136750.</p>
Data_Enhanced CO2 electroreduction with metal-nitrogen-doped carbons in a continuous flow reactor
<p>The folder contains the processed data of figures 1, 3, 4, 5, 6, 7, 8, S4, S5, S6, S7, S8, S9, S10, S17 and S18 that appear in:</p> <p>Duarte, M.; Daems, N.; Hereijgers, J.; Arenas-esteban, D.; Bals, S.; Breugelmans, T. Enhanced CO 2 Electroreduction with Metal-Nitrogen-Doped Carbons in a Continuous Flow Reactor. J. CO2 Util. 2021, 50, 101583.</p> <p><a href="https://doi.org/10.1016/j.jcou.2021.101583">https://doi.org/10.1016/j.jcou.2021.101583</a></p>
Data_Nickel-containing N-doped carbon as effective electrocatalysts for the reduction of CO2 to CO in a continuous-flow electrolyzer.
<p>The folder contains the processed data of figures 7, 8, 9, 10, 11, 12, S1, S11, S12, S14 & S15 that appear in:</p> <p>N. Daems, B. De Mot, D. Choukroun, K. Van Daele, C. Li, A. Hubin, S. Bals, J. Hereijgers and T. Breugelmans, Nickel-containing N-doped carbon as effective electrocatalysts for the reduction of CO<sub>2</sub> to CO in a continuous-flow electrolyzer, Sustainable Energy & Fuels, 2020,<strong>4</strong>, 1296-1311</p> <p>The processing method is described in the article (https://doi.org/10.1039/c9se00814d).</p>
Data for the manuscript "Microscopic Description of Basal Stress Generated by Granular Free-surface Flows"
<p>Data and Code for the manuscript "Microscopic Description of Basal Stress Generated by Granular Free-surface Flows"</p> <p>The following documents are necessary for reproducing the DEM case indicated in the main article.</p> <p>LIGGGHTS download insttuctions and operation manual can be found in this web site</p> <p>https://www.cfdem.com/media/DEM/docu/Manual.html<br> </p>
Three-dimensional micro-CT images of UV-frozen flow fronts recorded at different flow regimes
<p>Segmented micro-CT images of flow fronts produced by UV-flow freezing. Front morphologies correspond to capilary-dominated, equilibrated and viscous-dominated flow regimes.</p>
Influence of the target product on the electrochemical reduction of diluted CO2 in a continuous flow cell
<p>The folder contains the processed data of figures 3,4,5,6, SI fig. A.1., SI fig. D.4, SI fig. F.5, SI Fig. I.7, SI Fig. I.8, SI Fig. J.9, SI Fig J.10 that appear in:</p> <p>Van Daele, S., Hintjens, L., Van den Hoek, J., Neukermans, S., Daems, N., Hereijgers, J., & Breugelmans, T. (2022). Influence of the target product on the electrochemical reduction of diluted CO2 in a continuous flow cell. <em>Journal of CO2 Utilization</em>, <em>65</em>, 102210.</p>
Data_ Effects of Structured 3D Electrodes on the Performance of Redox Flow Batteries
<p>The folder contains the processed data of figures 3, 5, 7, 8, 9, S4, S5, S6, S7, S8, S9, S10, S11 and S12 that appear in:</p> <p>R. De Wolf, M. De Rop, and J. Hereijgers, “Effects of Structured 3D Electrodes on the Performance of Redox Flow Batteries,” <em>ChemElectroChem</em>, vol. 202200640, 2022, doi: 10.1002/celc.202200640.</p>
An electrochemical oscillatory flow reactor with pillar array electrodes improving mass transfer in electrosynthesis
<p>The folder contains the processed data of figures 2, 3, 4, 5, 6, & 7 that appear in:</p> <p>Vranckaert, M., Gemoets, H. P. L., Dangreau, R., van Aken, K., Breugelmans, T., & Hereijgers, J. (2022). An electrochemical oscillatory flow reactor with pillar array electrodes improving mass transfer in electrosynthesis. <em>Electrochimica Acta</em>, <em>436</em>(October), 141435</p>
Flow Dataset
Open the record for dataset details and reuse information.
TAX1BP1 deficiency impair initiation of autophagic flow in HK-2 cells through downregulate AMPK-ULK1 pathway
GEO Series GSE260876. Homo sapiens. 6 samples. Type: Expression profiling by high throughput sequencing.
Turbulence Models: Data from Other Experiments: Shock Wave / Turbulent Boundary Layer Flows at High Mach Numbers
Shock Wave / Turbulent Boundary Layer Flows at High Mach Numbers. This web page provides data from experiments that may be useful for the validation of turbulence models. This resource is expected to grow gradually over time. All data herein arepublicly available.
Stability of Spatially Distributed, Intersecting Aircraft Flows Under Sequential Conflict Resolution Schemes
This paper discusses the effect of sequential conflict resolution maneuvers of an infinite aircraft flow through a finite control volume. Aircraft flow models are utilized to simulate traffic flows and determine stability. Pseudo-random flow geometry is considered to determine airspace stability in a more random airspace, where aircraft flows are spread over a given positive width. The use of this aircraft flow model generates a more realistic flow geometry. A set of upper bounds on the maximal aircraft deviation during conflict resolution is derived. Also with this flow geometry it is proven that these bounds are not symmetric, unlike the symmetric bounds derived in previous papers for simpler flow configurations. Stability is preserved under sequential conflict resolution algorithms for all flow geometries discussed in this paper.
Characteristics of Reconnection Sites and Fast Flow Channels in an MHD Simulation: Simulation Results
The simulation outputs are asci files containing out from the MHD simulation mapped to the minimum magnetic field surface in the magnetotail during the March 14,2008 substorms. There is one time in each file and 2161 files each separated by 10s. The results span 6 hours from 0200 to 0800. The results are in GSM coordinates.
Turbulence Models: Data from Other Experiments: Shock Wave / Turbulent Boundary Layer Flows at High Mach Numbers
Shock Wave / Turbulent Boundary Layer Flows at High Mach Numbers. This web page provides data from experiments that may be useful for the validation of turbulence models. This resource is expected to grow gradually over time. All data herein arepublicly available.
Turbulence Models: Data from Other Experiments: Shock Wave / Turbulent Boundary Layer Flows at High Mach Numbers
Shock Wave / Turbulent Boundary Layer Flows at High Mach Numbers. This web page provides data from experiments that may be useful for the validation of turbulence models. This resource is expected to grow gradually over time. All data herein arepublicly available.
APOLLO 17 HEAT FLOW THERMAL CONDUCTIVITY RDR SUBSAMPLED V1.0
This data set comprises a reduced, subsampled set of the data returned from the Apollo 17 Heat Flow Experiment from 12 December 1972 through 31 December 1974. The experiment consisted of two probes placed by the Apollo 17 astronauts in holes drilled in the lunar surface near the Apollo 17 Lunar Surface Experiments Package site to measure the thermal conductivity. The data consist of a set of ten ASCII tables with time, temperature differences, and average temperatures readings measured by the thermocouples in the heat flow probes and probe cables. The data have been restored and reformatted from binary data held on magnetic tapes at the NASA National Space Science Data Center (NSSDC) under NSSDC ID of PSPG-00022 (old NSSDC ID 72-096C-01A).
Aircraft Proximity Maps Based on Data-Driven Flow Modeling
With the forecast increase in air traffic demand over the next decades, it is imperative to develop tools to provide traffic flow managers with the information required to support decision making. In particular, decision-support tools for traffic flow management should aid in limiting controller workload and complexity, while supporting increases in air traffic throughput. While many decision-support tools exist for short-term traffic planning, few have addressed the strategic needs for medium- and long-term planning for time horizons greater than 30 minutes. This paper seeks to address this gap through the introduction of 3D aircraft proximity maps that evaluate the future probability of presence of at least one or two aircraft at any given point of the airspace. Three types of proximity maps are presented: presence maps that indicate the local density of traffic; conflict maps that determine locations and probabilities of potential conflicts; and outliers maps that evaluate the probability of conflict due to aircraft not belonging to dominant traffic patterns. These maps provide traffic flow managers with information relating to the complexity and difficulty of managing an airspace. The intended purpose of the maps is to anticipate how aircraft flows will interact, and how outliers impact the dominant traffic flow for a given time period. This formulation is able to predict which "critical" regions may be subject to conflicts between aircraft, thereby requiring careful monitoring. These probabilities are computed using a generative aircraft flow model. Time-varying flow characteristics, such as geometrical configuration, speed, and probability density function of aircraft spatial distribution within the flow, are determined from archived Enhanced Traffic Management System data, using a tailored clustering algorithm. Aircraft not belonging to flows are identified as outliers.
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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.