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601 results found

Code to accompany "Superancillary Equations for the Multiparameter Equations of State in REFPROP 10.0"

Data provided by  National Institute of Standards and Technology

This record includes the C++ files used to generate superancillary equations (sets of Chebyshev expansions for the co-existing thermodynamic data) for the multiparameter EOS included in NIST REFPROP 10.0. The calculations in C++ are done in extended precision and the Chebyshev expansions are stored in double precision. The python scripts are used to post-process the generated sets of Chebyshev expansions.

Tags: Chebyshev expansions,function approximation,equations of state,phase equilibria,

Modified: 2025-04-06

3D shape and size data for 10084 and 14163 lunar regolith particles

Data provided by  National Institute of Standards and Technology

This database contains 3D shape and size data for 10084 (Apollo 11) and 14163 (Apollo 14) real lunar regolith particles, along with STL files for the approximately 14,000 particles studied via X-ray micro-CT and X-ray nano-CT. The database also contains similar information for the lunar regolith simulant JSC-1A but for over 100,000 particles. There are also images for all 10084 and 14163 particles examined by SEM, which are different particles out of the same material.

Tags: lunar regolith,Apollo 11,Apollo 14,10084,14163,shape,size,X-ray micro computed tomography,light scattering,projected area,size distribution,shape distribution,NASA,

Modified: 2025-04-06

Code for qDIC-based Strain Localization Analysis with Wavelets (Q-SLAW)

Data provided by  National Institute of Standards and Technology

This dataset is an archival version of an algorithm implementation for strain localization analysis in digital image correlation data. The original application is to detect the occurrence of localization (i.e., collective buckling, hotspots, etc.) in uniaxial stress testing of polymer foams instrumented with 2D digital image correlation. The full-field strain maps are processed with a Marr wavelet and regions of excess strain are identified.

Tags: Digital Image Correlation,strain localization,compaction band,Foam,

Modified: 2025-04-06

Code for "An atomic boson sampler"

Data provided by  National Institute of Standards and Technology

This package is a collection of scripts and methods for analyzing data from the Kaufman lab's experiment for boson sampling using atoms, tunneling in their optical lattice.Please read the paper [arXiv:2307.06936](https://doi.org/10.48550/arXiv.2307.06936) for context.The data included in the subdirectory ``Boson sampling data/`` consists of shots of the experiment, where the atoms are prepared in a particular pattern,then the atoms are allowed to tunnel, then the atom number parity is measured on each site.From this data, we estim

Tags: quantum,BosonSampling,

Modified: 2025-04-06

Using Open-Path Dual-Comb Spectroscopy to Monitor Methane Emissions from Simulated Grazing Cattle

Data provided by  National Institute of Standards and Technology

Data published in the paper "Using Open-Path Dual-Comb Spectroscopy to Monitor Methane Emissions from Simulated Grazing Cattle". A controlled methane release experiment was performed to determine if dual comb spectroscopy (DCS) can detect methane concentration enhancements above the atmospheric background produced by a typical herd of beef cattle in an extensive grazing system. Open-path DCS was used to measure downwind and upwind methane concentrations from ten point-sources of methane simulating cattle.

Tags: agriculture,atmospheric measurements,

Modified: 2025-04-06

Differential Measurements of an AC Source with a Josephson Arbitrary Waveform Synthesizer

Data provided by  National Institute of Standards and Technology

The abstract of the paper [1] is:This paper describes differential sampling measurements of an ac source and a Josephson arbitrary waveform synthesizer (JAWS).A new iterative approach for aligning the phases of the JAWS and the source waveforms was implemented to minimize the differential voltage at the digitizer.

Tags: Josephson arrays,Measurement techniques,standards,superconducting integrated circuits,voltage measurement,

Modified: 2025-04-06

Data for Filtering Organized 3D Point Clouds for Bin Picking Applications

Data provided by  National Institute of Standards and Technology

Contains scans of a bin filled with different parts ( screws, nuts, rods, spheres, sprockets). For each part type, RGB image and organized 3D point cloud obtained with structured light sensor are provided. In addition, unorganized 3D point cloud representing an empty bin and a small Matlab script to read the files is also provided. 3D data contain a lot of outliers and the data were used to demonstrate a new filtering technique.

Tags: 3D point cloud,stochastic outlier removal,filtering 3D data for bin picking,

Modified: 2025-04-06

Markerless Body Tracking System Results for Industrial Exoskeletons

Data provided by  National Institute of Standards and Technology

Red, Green, and Blue (RGB) and depth markerless body tracking systems were applied for industrial exoskeletons. The original images and their body tracking results are described in this data set. The data set describes the body tracking result changes by exoskeletons, industrial task poses, and camera viewpoints. A full-body exoskeleton, an upper-body exoskeleton, and an exosuit are used in the test. Stand, bend forward, squat, and crouch are defined as industrial poses with stretching arms forward, forward-up, up, forward-down, or down.

Tags: Exoskeleton,body tracking,RGD-Depth,

Modified: 2025-04-06

Standard Reference Material (SRM) 3290 Dry Cat Food Data

Data provided by  National Institute of Standards and Technology

This data comprises the information that was used to assign values, the assigned values themselves, and the associated uncertainties. Certificate date 20 May 2024.

Tags: cat food,pet food,nutrition,proximates,fatty acids,vitamins,elements,amino acids,

Modified: 2025-04-06

Dataset demonstrating feasibility of two-ladder sensing approach

Data provided by  National Institute of Standards and Technology

Datasets included in manuscript on simultaneous two-ladder sensing, titled "Independent Rydberg Atom Sensing using a Dual-Ladder Scheme" to be submitted to Applied Physics Letters. The data for figure 1 contains experimental EIT traces for both ladders, and figure 2 contains the data for false-color plots showing the polarization-specific response of each ladder.

Tags: Rydberg atoms,atomic physics,receivers,fields strength,electric field,volts/meter,

Modified: 2025-04-06