U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Breadcrumb

  1. Home

Dataset Search

Search results

1044 results found

Maxwell-Bloch Equations for Two-Level System

Data provided by  National Institute of Standards and Technology

The Maxwell-Bloch equations for a two-level system are solved in a particular case. The example follows that of P. Siddons, "Light propagation through atomic vapours," Journal of Physics B: Atomic, Molecular, and Optical Physics 47, 093001 (2014). In the reference, the optical intensity, population of the upper state and coherence are given for light with a carrier frequency which is on resonance. Here, the same example is worked, but the result is given at intermediate times as well as at the entrance and exit faces as in the example.

Tags: Quantum Optics ; Quantum Memory ; Theory ; Simulation ; Maxwell-Bloch Equations ; Two-Level System,

Modified: 2024-02-22

Views: 0

Data Publication: Metallurgical Analysis and Conservation of Turbine Blades from Recovered Apollo F-1 Engines

Data provided by  National Institute of Standards and Technology

This data set includes data and metadata about a metallurgical analysis and conservation of turbine blades from a recovered F-1 engine from the Apollo 16 Saturn V rocket. This data set includes:  images of the as recovered turbine blades, cross sections of the recovered turbine blades after vacuum impregnation, x-ray fluorescence (XRF) and energy dispersive spectroscopy (EDS) measurements of the recovered turbine blades.

Tags: Space Program; Superalloy; Turbine; marine corrosion; metallography,

Modified: 2024-02-22

Views: 0

Data to accompany "Low Electron Beam Energy X-ray Microanalysis: The Adventure Continues!"

Data provided by  National Institute of Standards and Technology

EDS spectra measured at E0 = 5 keV for 75 materials are provided along with the standards used for quantification with the NIST DTSA-II software for electron-excited X-ray microanalysis with energy dispersive spectrometry.The data sets are organized according to the analytical instrument platform used, and an EDS detector configuration appropriate to each EDS spectrometer is provided .

Tags: SEM-EDS,SEM,EDS,scanning electron microscopy,energy dispersive x-ray spectrometry,X-ray spectrometry,silicon-drift detector,SDD,low beam energy,low keV,

Modified: 2024-02-22

Views: 0

Electric field inhomogeneity

Data provided by  National Institute of Standards and Technology

Measurement of the effect of electric field inhomogeneity on electromagnetically induced transparency in a waveguide-based cesium atomic vapor cell. Used for the figure for the Photonics West 2023 manuscript.

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

Modified: 2024-02-22

Views: 0

Hot-wire anemometer gas speed measurements in a commercial laser powder bed fusion machine

Data provided by  National Institute of Standards and Technology

Gas speed measurements using hot-wire anemometers (HWA) on a commercial laser powder bed fusion (LBPF) machine were recorded as a function of position (X, Y, Z) and nozzle type (standard and grid).

Tags: additive manufacturing,gas flow,anemometer,machine qualification,

Modified: 2024-02-22

Views: 0

Data to Support the Development of Rapid GC-MS Methods for Seized Drug Analysis

Data provided by  National Institute of Standards and Technology

This dataset contains raw datafiles that support the development of rapid gas chromatography mass spectrometry (GC-MS) methods for seized drug analysis. Files are provided in the native ".D" format collected from an Agilent GC-MS system. Files can be opened using Agilent proprietary software or freely available software such as AMDIS (which can be downloaded at chemdata.nist.gov). Included here is data of seized drug mixtures and adjudicated case samples that were analyzed as part of the method development process for rapid GC-MS.

Tags: forensics,Seized Drug,GC-MS,

Modified: 2024-02-22

Views: 0

Historic test velocity data used for chronograph/light screen system uncertainty analysis.

Data provided by  National Institute of Standards and Technology

Projectile velocity data, from tests using the National Institute of Justice (NIJ) body armor standard (NIJ-0101.06) test threats, collected over a numbers of years at the NIST ballistics laboratory, that was used to assess the uncertainty associated with a chronograph/light screen system.

Tags: Ballistics,velocity measurement,

Modified: 2024-02-22

Views: 0

Sequence-based allelic variations and frequencies for 22 autosomal STR loci in the Lebanese population - Supplementary material

Data provided by  National Institute of Standards and Technology

This data repository is meant to provide the supplementary files, tables, and figures included in the peer-reviewed research article entitled: "Sequence-based allelic variations and frequencies for 22 autosomal STR Loci in the Lebanese population".

Tags: Lebanon,Lebanese population,Next Generation Sequencing,Autosomal STR loci,Sequence variations,Population STRUCTURE,PowerSeq 46GY,

Modified: 2024-02-22

Views: 0

Correlation-Matrix Approaches for Testing Wireless Devices in Reverberation Chambers

Data provided by  National Institute of Standards and Technology

The data correspond to the paper Practical Correlation-Matrix Approaches for Standardized Testing of Wireless Devices in Reverberation Chambers. Abstract: We extend the autocorrelation-based approaches currently used in standards to full correlation matrix-based approaches in order to identify correlation between both spatially adjacent and non-adjacent samples in reverberation-chamber measurements. We employ a scalar metric that allows users to identify the number of effectively uncorrelated samples in new types of stirring sequences.

Tags: cellular device measurements; metrology for wireless systems; millimeter-wave metrology; millimeter-wave wireless device; mobile communications; modulated signals; over-the-air measurements; reverberation chamber; uncertainty; wireless systems,

Modified: 2024-02-22

Views: 0

Supporting Info for Synergistic Fire Resistance of Nanobrick Wall Coated 3D Printed Photopolymer Lattices

Data provided by  National Institute of Standards and Technology

Videos and .stl files from Synergistic Fire Resistance of Nanobrick Wall Coated 3D Printed Photopolymer Lattices.The videos are from the fire tests of 3D printed photopolymer parts, from which time series still images were acquired. In these tests, printed parts (with or without a nanocoating) are subjected to direct blowtorch exposure until part failure (defined as when the part shatters). Most videos include time after torch removal while the part continues to burn.The .stl files are the files used to 3D print the parts studied in this work.

Tags: Fire protection,layer-by-layer,additive manufacturing,

Modified: 2024-02-22

Views: 0