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1,880 results for “Dimensionality”
Directional ballistic transport in the two-dimensional metal PdCoO2
<p>In an idealized infinite crystal, the material properties are constrained by the symmetries of its unit cell. However, the point-group symmetry is broken by the sample shape of any finite crystal, but this is commonly unobservable in macroscopic metals. To sense the shape-induced symmetry lowering in such metals, long-lived bulk states originating from an anisotropic Fermi surface are needed. Here we show how a strongly facetted Fermi surface and the long quasiparticle mean free path present in microstructures of PdCoO<sub>2</sub> yield an in-plane resistivity anisotropy that is forbidden by symmetry on an infinite hexagonal lattice. We fabricate bar-shaped transport devices narrower than the mean free path from single crystals using focused ion beam milling, such that the ballistic charge carriers at low temperatures frequently collide with both of the side walls that define the channel. Two symmetry-forbidden transport signatures appear: the in-plane resistivity anisotropy exceeds a factor of 2, and a transverse voltage appears in zero magnetic field. Using ballistic Monte Carlo simulations and a numerical solution of the Boltzmann equation, we robustly identify the orientation of the narrow channel as the source of symmetry breaking.</p>
Data cubes corresponding to the article "Three-dimensional Structure of the Corona during WHPI Campaign Rotations CR-2219 and CR-2223"
<p>CONTENTS of REPOSITORY:</p> <p>The shared data corresponds to 3D tomographic reconstructions and 3D MHD simulations of the solar corona and solar wind of WHPI targets CR-2219 and CR-2223. Each 3D cube of data is specified in a uniform spherical grid, as described in the IDL codes that allow reading the cubes into memory. The specific shared products are: </p> <p>3D Tomographic reconstructions:<br> * DEMT: Electron density (Ne) and temperature (Te) in the height range 1.02-1.25 Rsun (based on AIA images).<br> * WL-SRT: Electron density (Ne) in the height range 2.5-6.0 Rsun (based on LASCO-C2 data). </p> <p>3D MHD steady-state simulations using the AWSoM model:<br> * Electron density (Ne) and temperature (Te).<br> * Magnetic field components (Br, Bth, Bph).<br> * Radial component of the solar wind velocity (Vr).</p> <p>INSTRUCTIONS: The IDL script included contains comments describing how to read into memory the data.<br> </p>
Multi-dimensional hydrodynamic simulations of stellar objects
<p>Supplementary material for the ArbeitsgruppenInspirationsMesse event</p>
Reproducibility data for tables in "A machine learning approach to portfolio pricing and risk management for high dimensional problems"
<p>This dataset contains all the information necessary for reproducing the tables in the paper "A machine learning approach to portfolio pricing and risk management for high dimensional problems".</p> <p>The raw benchmark data can be found in the Zenodo dataset "Benchmark and training data for replicating financial and insurance examples" (https://zenodo.org/record/3837381). To the extend necessary, only summary data from that dataset is used in this dataset.</p> <p>The dataset includes a jupyter notebook file that explains what the different files contain, and provides sample code to analyze the information and reproduce the tables.</p>
Data for "The foundational role of cognitive resources in cross-dimensional interference of time on space"
Open the record for dataset details and reuse information.
DATA_Scaling of mixing in three-dimensional rotating Rayleigh-Taylor turbulence
<p>Data for Scaling of mixing in three-dimensional rotating Rayleigh-Taylor turbulence</p>
Comparison of dimensional reduction methods in Raman spectral data of mouse uterus and placenta tissues
Open the record for dataset details and reuse information.
Data for "Spatial scales of rising-tone chorus in a dipole magnetic field: two-dimensional particle-in-cell simulation"
<p>The GCPIC simulation output data and the corresponding data analysis code.</p>
Codes inside shells of low-dimensional integer lattices.
<p>Let <em>S(n,t,k)</em> be the maximum size of a code containing only vectors of the <em>k</em>th shell of the <em>n</em>-dimensional integer lattice such that the inner product between distinct vectors does not exceed <em>t</em>. The file A.pdf contains examples of codes leading to lower bounds for <em>S(n,t,k)</em>, one example for the each lower bound. By <em>(n,k,t,N)</em> we denote a code containing <em>N</em> vectors of the <em>k</em>th shell of the <em>n</em>-dimensional integer lattice such that the inner product between any two different vectors is at most <em>t</em>. The following format to describe example codes is used:</p> <p>— If a code is constructed using a signed permutation group, then a list containing generators of the corresponding group <em>G</em> is given first followed by a list containing used block system and <em>G</em>-orbits forming the code. Each orbit is represented by a list containing orbit representative and an orbit size (in that order). Finally, a code may also contain explicitly added vectors. In this case corresponding list contains two items: a number of explicitly added vectors and an another list containing the vectors.</p> <p>— If a permutation group is used, then the format stays the same except the list containing block system is not present.</p> <p>— Some codes are constructed by scaling spherical codes obtained by <em>Y_n</em> constructions described in [1]. If one part of an example code is constructed by using a signed permutation group, then <em>Y_n</em>-constructed part also utilizes the same block system to describe components of codevectors.</p> <p>— Notation <em>W(n,w)</em> is used to denote a weighing matrix of order <em>n</em> and weight <em>w</em> used to map vectors of a <em>(n,k,t,N)</em>-code into <em>kw</em>th shell of <em>n</em>-dimensional integer lattice to produce a <em>(n,kw,tw,N)</em>-code.</p> <p>The file B.pdf lists some examples of large spherical codes containing vectors from multiple shells. To obtain spherical codes scale given vectors appropiately. If only parameters of a code are given without the construction, then this code is one of the examples given in A.pdf.</p> <p>[1] Ericsson, T.; Zinoviev, V.: Codes on Euclidean Spheres. Elsevier, Amsterdam, 2001.</p>
Three-dimensional FFA-W3 static airfoil data over 360-degree angles of attack
<p>The uploaded files contain data for pressure, viscous and moment forces for 160 flow-through times generated for seven FFA-W3 airfoils between 21% and 50% thickness, and flat plate for 59 angles of attack between -180 and 180 degrees and Reynolds number of 10Million. Results of flow past a right circular cylinder has also been uploaded. The data can be used to extract polars, amplitude of load oscillations, and vortex shedding frequencies.</p>
Model input data, simulation output data and processed data presented in "Modelling the three-dimensional, diagnostic anisotropy field of an ice rise"
Open the record for dataset details and reuse information.
Data set for Two- to three-dimensional crossover in a dense electron liquid in silicon
<p>Data set for Two- to three-dimensional crossover in a dense electron liquid in silicon paper</p>
Supplementary material 8 from: Ichiishi W, Shimada S, Motobayashi T, Abe H (2019) Completely engaged three-dimensional mandibular gear-like structures in the adult horned beetles: reconsideration of bark-carving behaviors (Coleoptera, Scarabaeidae, Dynastinae). ZooKeys 813: 89-110. https://doi.org/10.3897/zookeys.813.29236
: Data type: Movie
Supplementary material 9 from: Ichiishi W, Shimada S, Motobayashi T, Abe H (2019) Completely engaged three-dimensional mandibular gear-like structures in the adult horned beetles: reconsideration of bark-carving behaviors (Coleoptera, Scarabaeidae, Dynastinae). ZooKeys 813: 89-110. https://doi.org/10.3897/zookeys.813.29236
: Data type: Figure
Supplementary material 7 from: Ichiishi W, Shimada S, Motobayashi T, Abe H (2019) Completely engaged three-dimensional mandibular gear-like structures in the adult horned beetles: reconsideration of bark-carving behaviors (Coleoptera, Scarabaeidae, Dynastinae). ZooKeys 813: 89-110. https://doi.org/10.3897/zookeys.813.29236
: Data type: Movie
Supplementary material 5 from: Ichiishi W, Shimada S, Motobayashi T, Abe H (2019) Completely engaged three-dimensional mandibular gear-like structures in the adult horned beetles: reconsideration of bark-carving behaviors (Coleoptera, Scarabaeidae, Dynastinae). ZooKeys 813: 89-110. https://doi.org/10.3897/zookeys.813.29236
: Data type: Figure
Supplementary material 6 from: Ichiishi W, Shimada S, Motobayashi T, Abe H (2019) Completely engaged three-dimensional mandibular gear-like structures in the adult horned beetles: reconsideration of bark-carving behaviors (Coleoptera, Scarabaeidae, Dynastinae). ZooKeys 813: 89-110. https://doi.org/10.3897/zookeys.813.29236
: Data type: Table
Supplementary material 4 from: Ichiishi W, Shimada S, Motobayashi T, Abe H (2019) Completely engaged three-dimensional mandibular gear-like structures in the adult horned beetles: reconsideration of bark-carving behaviors (Coleoptera, Scarabaeidae, Dynastinae). ZooKeys 813: 89-110. https://doi.org/10.3897/zookeys.813.29236
: Data type: Measurement
Supplementary material 3 from: Ichiishi W, Shimada S, Motobayashi T, Abe H (2019) Completely engaged three-dimensional mandibular gear-like structures in the adult horned beetles: reconsideration of bark-carving behaviors (Coleoptera, Scarabaeidae, Dynastinae). ZooKeys 813: 89-110. https://doi.org/10.3897/zookeys.813.29236
: Data type: Movie
Supplementary material 2 from: Ichiishi W, Shimada S, Motobayashi T, Abe H (2019) Completely engaged three-dimensional mandibular gear-like structures in the adult horned beetles: reconsideration of bark-carving behaviors (Coleoptera, Scarabaeidae, Dynastinae). ZooKeys 813: 89-110. https://doi.org/10.3897/zookeys.813.29236
: Data type: Movie
ScienceDex guides
Understand access before you commit
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.