AndreaBozzo/ceres-open-data-index huggingface dataset:
Dataset for Radio-Frequency Fingerprinting Millimeter-Wave Commercial Off-the-Shelf Cellular User Equipment

This data is associated with the manuscript titled Radio-Frequency Fingerprinting Millimeter-Wave Commercial Off-the-Shelf Cellular User Equipment. The abstract of this manuscript is: We present a measurement test bed and algorithm for non-destructive, millimeter wave over-the-air fingerprinting of commercial off-the-shelf cellular user equipment (UE) at the model level. This test bed has been configured to repeatably collect radiated fields from UEs in a 5G mmWave scenario. We evaluate the performance of a classification algorithm that uses linear discriminant analysis on two types of measured waveforms from cellular user equipment under test. One of the waveforms is the user equipment transmitted symbol constellation vector, which is complex-valued. The classification algorithm uses the symbol constellation waveforms collected from the UEs to generate a unique fingerprint of the test UE. The other waveform is the filtered uplink spectrum waveform from the UEs. We evaluate the performance of our test bed and algorithm by analyzing the temporal stability of the data sets for the purposes of fingerprinting and quantifying the classification performance of the test bed and algorithm.

Tags: metrology-for-wireless-systems-milimeter-wave-wireless-device-modulated-signals-over-the-air-wi
Organization: National Institute of Standards and Technology
Life Cycle Assessment Models for Construction Materials

This dataset is a set of life cycle assessment (LCA) models for select construction materials that have been developed by the Applied Economics Office of the Engineering Laboratory.  An LCA model consists of two components: an inventory and a dataset(s). An inventory compiles and quantifies environmentally relevant flows: products, materials (including waste and emissions), or energy as defined in ISO 14040. Datasets contain environmentally relevant information of the process producing or treating the related flow. Datasets are commonly referred to as "processes" or "process models" in LCA literature.The models published here are "bridged" (i.e., call on) to publicly available life cycle inventory (LCI) databases available on the Federal LCA Commons (USLCI and eLCI databases). These models are built in openLCA, a free, public LCA modeling software tool. Users can download the ZIP file and upload directly into openLCA to use the models. The models are examples and provide a template (i.e., starting point) for structuring an LCA model for the specific product. The inventory should not be considered representative for an entire industry.

Tags: life-cycle-assessment-construction-materials-cement-concrete-gypsum-sustainability-representati
Organization: National Institute of Standards and Technology
Long term drift of the baseline-corrected, Voltage to Frequency conversion factor, observed in a Commercial-Off-the-Shelf Voltage-Controlled Crystal Oscillator.

Two column data of baseline-corrected sensitivity-drift (in units of PPM) of a Commercial-Off-the-Shelf VC/OCXO with respect to time (in units of years). The dataset spans about 0.7 years. Two spreadsheets are included in the workbook. The spreadsheet titled "Raw Data w. gaps 'as-collected'" contains the raw drift data, without any gap-filling. This shows the aging of a VC/OCXO's baseline-corrected sensitivity to constant input voltage. Text entries of "gap" in these numeric data arrays denote breaks in the data collection process attributable to other demands on the facility. The spreadsheet titled "Gap-filled data set" is needed for performing Allan variance analysis. Gaps in the data were mitigated by employing the technique outlined in D. A. Howe, C. Champagne and N. Schlossberger, "A Total Imputation Algorithm that Fills Gaps in Time Series Measurements for ADEV and Phase Noise Characterizations of Power-law Noise Models," 2022 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS), Paris, France, 2022, pp. 1-2, doi: 10.1109/EFTF/IFCS54560.2022.9850921.

Tags: component-aging, quartz-crystal-oscillator, vc-ocxo, vcxo, voltage-metrology, voltage-reference, voltage-reference-aging, voltage-reference-drift, voltage-reference-validation
Organization: National Institute of Standards and Technology
Compressive Stress-Strain Curves for Wrought and AM Precipitation-Hardenable Stainless Steel at Dynamic Strain Rates at Room Temperature and with Rapid Heating and at Low Strain Rates at Room Temperature

This dataset contains compressive stress-strain data (strain, stress and strain rate curves and initial temperatures) for compression experiments performed on wrought and AM 17-4 precipitation-hardenable stainless steel (PH SS) using the NIST Kolsky Bar apparatus [1] and a servohydraulic test machine. The wrought data are obtained for three standard heat treatment conditions, including solutionized, H900 and H1150. Additional data are obtained for additional heat treatment times and temperatures to obtain precipitation kinetics information. The data are used to develop a plasticity model for wrought 17-4 PH SS. The experimental methods, data, material characterization and plasticity model are described in [2].[1] https://www.nist.gov/mml/materials-science-and-engineering-division/mechanical-performance-group/kolsky-bar-facility[2] Mates, S.P., Habib, S., Zuback, J. et al. On the Dynamic Mechanical Behavior of Wrought and AM 17-4 Precipitation-Hardenable Stainless Steels Under Rapid Heating. J. dynamic behavior mater. 10, 316–337 (2024). https://doi.org/10.1007/s40870-024-00413-1

Tags: advanced-manufacturing, experiments, high-heating-rate, high-strain-rate, machining, mechanical-properties, metals, modeling, simulations
Organization: National Institute of Standards and Technology
A Fully Registered In-Situ and Ex-Situ Dataset for Metal Powder Bed Fusion Additive Manufacturing: Data Processing, Feature Extraction, Registration, and Uncertainties

This document details the data registration process for the previously published datasets from Additive Manufacturing Metrology Testbed (AMMT) parts, "Overhang Part X4," generated at the National Institute of Standards and Technology (NIST). The two datasets —one for process monitoring and the other for XCT inspection—covering four overhang parts, along with their descriptions were published in 2020. The published data have been well-received by the community, advancing the understanding of laser powder bed fusion additive manufacturing (AM). In the last four years, the NIST team encountered numerous questions regarding the published datasets, as the raw data were not easily interpretable for mining process-structure relationships. To support a wider range of research efforts across multiple disciplines, the NIST team conducted additional data analysis, resulting in a fully registered and well-documented dataset for publication. This document provides a detailed overview of the data processing pipeline and the multi-modal data registration techniques employed, including preprocessing, feature extraction, and data alignment. The final registered dataset consists solely of numerical values, fully aligned with the machine coordinate system. Key features of the registered data include process parameters, laser power, in-situ melt pool characteristics, in-situ layerwise optical intensity, and ex-situ XCT voxel values. Additionally, this document provides uncertainty analysis for each feature to help users better select data for their applications and evaluate their results. It can also serve as a framework for processing similar datasets collected on the same testbed in future research.

Tags: additive-manufacturing-data-management-data-registration-feature-extraction-uncertainty-quantif
Organization: National Institute of Standards and Technology
Trojan Detection Software Challenge - Leftovers

This collection of AI models consists of the trained yet unreleased models constructed for the TrojAI program. These models were not required for the published round they come from for some reason. Some were simply extras, others did not meet the release criteria for accuracy or trojan attack success rate, or other reasons. These models should not be considered high quality. They might be poorly trained and unfit for their stated purpose. Examine the metadata released with each model to determine whether you can leverage it.

Tags: trojan-detection-artificial-intelligence-ai-machine-learning-adversarial-machine-learning
Organization: National Institute of Standards and Technology
Data associated with "Differential chirped-pulse dual-comb spectroscopy for complex line shape fitting the R(6) manifold of the 2ν3 band of methane" published in the Journal of Quantitative Spectroscopy & Radiative Transfer 340: 109454 (2025).

Data associated with "Differential chirped-pulse dual-comb spectroscopy for complex line shape fitting the R(6) manifold of the 2ν3 band of methane" published in the Journal of Quantitative Spectroscopy & Radiative Transfer 340: 109454 (2025).

Tags: dual-comb, electro-optic-combs, hartmann-tran, magnitude, phase
Organization: National Institute of Standards and Technology
Data for manuscript entitled "Compact dual comb time-transfer and ranging for future space-based distributed sensing"

Data for the figures in the manuscript entitled "Compact dual comb time-transfer and ranging for future space-based distributed sensing" published in Applied Optics.  Abstract: We describe a general design for a compact frequency comb-based optical time transfer and ranging node with volume of 14 L, mass of 10 kg, and power consumption of 46 W. We assess the residual noise from the comb-based system by making both ranging and time transfer measurements using these compact nodes over a 4.4 km free-space testbed. We demonstrate that this node design has the potential to support sub-femtosecond clock comparisons and sub-micron range measurements at averaging intervals of one second with a mean received power of 20 nW. This is more than sufficient to support future space-based distributed coherent sensing at observing frequencies beyond 1 THz. Fig4a: Time-of-flight measurements from node 1 and node 2. Fig 4b: The difference in measured time of flight between nodes.Fig5: Clock offset measurements between node 1 and 2 based on the 1 m fiber reference arm and 4.4 km link time offset data. Fig6: Timing jitter PSD for one-way time-of-flight, clock offsets, and time-of-flight difference measurements. Fig7: Time deviation for time-of-flight difference and clock offset measurements.

Tags: free-space-optical-ranging, free-space-optical-time-transfer, optical-frequency-comb, optical-ranging, optical-time-transfer
Organization: National Institute of Standards and Technology
Phase-shift Data for Fully Quantum Calculations of Thermophysical Properties for Noble Gases

This data deposit contains JSON files of phase-shift data and related quantities for pair interactions using state-of-the-art pair potentials for helium (isotopes of mass 3 and 4 and their cross interaction), neon (all six interactions among isotopes with masses 20, 21, and 22), and argon (the dominant isotope of mass 40).  A Python program is supplied to compute the second virial coefficient B(T), its first two temperature derivatives, and the second acoustic virial coefficient for any of these pair interactions at temperatures up to 1500 K. The lower temperature limit is 0.01 K for helium, 1 K for neon, and 10 K for argon.  Another program is supplied to calculate these quantities for neon of natural isotopic composition.This work is described in a paper: G. Garberoglio and A.H. Harvey, "Avoiding Interpolation Errors for Computed Second Virial Coefficients of Noble Gases", Metrologia, in preparation (2025).The code and data files are also maintained at this Github site:https://github.com/gioGarbe/TAPPS

Tags: acoustic-virial-coefficients, argon, helium, neon, phase-shifts, second-virial-coefficient, thermodynamics
Organization: National Institute of Standards and Technology
Enhanced Gain Extrapolation

We present an overview on a recently developedtechnique for performing antenna gain measurements with gainextrapolation that uses significantly fewer data points and atshorter distances than traditional gain extrapolation. This enhancedtechnique purposely incorporates third-order mutualcoupling between antennas, which can be thought of as a usefulhomodyne signal, rather than an unwanted degradation of theantenna-to-antenna coupling signal as has been the historicallyaccepted viewpoint. From Wacker’s fundamental extrapolationequations, we give the development of the third-order signalwhich underpins this technique. From the third-order signal theframing of gain extrapolation can be approached as a measureof interference fringes, as opposed to a by-rote curve fittingproblem, and thus provides ways of specifying the numberof required data points and measurement distances so as toreduce both significantly from the traditional gain extrapolationapproach. The truncation order of the full signal expansion,as it relates to the conditioning of the problem, is presentedin light of the behavior of the design matrix that defines thegain extrapolation scenario and the orders of scattering, thusleading to fewer required samples. Along with considerations ofthe matrix conditioning, guidelines are presented from the thirdordersignal and interference fringes for sampling criteria andsampling accuracy criteria. These aid in choices of measurementsystem accuracy and precision requirements based on knownvalues of the operating frequency, wavelength, and antennadimensions. Bounds for gain uncertainty based on these samplingcriteria are also given. Results comparing NIST reference antennameasurements made with the traditional gain extrapolationand enhanced gain extrapolation technique are presented. It isshown that the enhanced technique can produce gain values inagreement and within uncertainties of the traditional techniquefor the reference antennas.

Tags: antenna-gain, antenna-measurements, gain, gain-extrapolation, gain-measurements, sparse-measurements
Organization: National Institute of Standards and Technology
Observations of carbon dioxide (CO2), methane (CH4), and carbon monoxide (CO) mole fractions from the Los Angeles Megacity Carbon Project

Updated April 2025. Here we provide hourly observations of carbon dioxide (CO2), methane (CH4), and carbon monoxide (CO) mole fractions in dry  air from tower- and rooftop-based sites in the Los Angeles Megacity Carbon Project network. Each *.tgz (tar/gzip) archive contains data files  for a given site location, named by its 3-letter code. To extract *.tgz files on a unix platform, use "tar -xvzf <filename>". Data files with in the <site>-1-hr-CSV.tgz archives are comma delimited (CSV) 1-hour averages; data files within the <site>_1-hr-NC.tgz archives are 1-hour averages in NetCDF format; data files within the <site>-1-min-CSV.tgz are CSV files with 1-minute averages (there is no NetCDF version for 1-minute data). Site locations, heights, and other information are in a separate ascii (CSV) file (LAM_sites.csv), and also within each data file  (for the 1-hour averages files). We encourage the use of the locations within the hourly data files, as some locations may have changed during the site lifetime and have duplicate entries in the site file. Data in this archive is for January 1 2015-January 31 2025. ASCII Readme files (1Readme_v20250425.txt and 1Readme_1minfiles_v20250425.txt) contain data details; Updates_v20250425.pdf includes additional information on updates since the previous data version. Note about calibrations: CO2 data are reported on the NOAA/WMO X2019 calibration scale. CH4 data are reported on the NOAA/WMO X2004A calibration scale; CO data, where available, are reported on the NOAA/WMO X2014 scale. Note that previous archive s of this data reported CO2 on the X2007 scale. This data is being freely distributed for research, academic and related non-commercial purposes consistent with NIST's mandate to further the science and the promulgation of appropriate standards. Current update: April 25, 2025.

Tags: carbon-dioxide, emissions-inventory, ghg-measurements, greenhouse-gases, urban-emissions-modeling
Organization: National Institute of Standards and Technology
TREC 1993 Routing dataset

In TREC the routing task is represented by using known topics and known relevant documents for those topics, but new data for testing. The participants are given a set of known (or training) topics, along with a set of documents, including known relevant documents for those topics. The topics consist of natural language text describing a user's information need. The topics are used to create a set of queries (the actual input to the retrieval system) which are then used against the training documents.

Tags: trec-video-trecvid
Organization: National Institute of Standards and Technology
AM Bench 2018 measurement results data: optical microscopy of laser-scanned single tracks on nickel Alloy 625 plates (AMB2018-02)

The following optical micrograph data files are provided in support of the AM Bench 2018 modeling challenges associated with bare plate single track laser scans performed on the NIST Additive Manufacturing Metrology Testbed. These measurements were used in the AMB2018-02 set of challenges associated with track melt pool geometry (CHAL-AMB2018-02-MP). Description of the associated measurements and modeling challenges are provided on the AMB2018-02 challenge description webpage (<https://www.nist.gov/ambench/amb2018-02-description>).

Tags: am-bench, benchmark, laser-melt-pool, lpbf, pbf-lb
Organization: National Institute of Standards and Technology
"Construction of Amorphous Structure Models via Relaxation of Random Arrangements of Molecules" dataset.

Dataset and workflow for the Construction of Amorphous Structure Models via Relaxation of Random Arrangements of Molecules. This is associated with manuscript "Construction of Amorphous Structure Models via Relaxation of Random Arrangements of Molecules" by Jarod Worden, Eric Cockayne, and Kevin F. Garrity. The primary investigated systems are silicon, SiO2, HfO2, ZrCu, and Al2O3.

Tags: amorphous-structures, chips, density-functional-theory
Organization: National Institute of Standards and Technology
Data associated with "Frequency-doubled chirped-pulse dual-comb generation in the near-UV: Combined vs separated beam investigations of Rb atoms near 420 nm" accepted for publication in Scientific Reports (2025).

Data associated with "Frequency-doubled chirped-pulse dual-comb generation in the near-UV: Combined vs separated beam investigations of Rb atoms near 420 nm" accepted for publication in Scientific Reports (2025).

Tags: chirped-pulse, dual-electro-optic-comb, nitrogen-dioxide-detection, rubidium-atom-sensing, ultraviolet-combs
Organization: National Institute of Standards and Technology
Detection Limits for SEM Image Segmentation

The dataset consists of six collections of SEM images, three trained U-net AI models, and CSV files with image quality metrics and trained AI model accuracy metrics. Each SEM image collection contains images augmented with Poisson noise and contrast.This work was performed with funding from the CHIPS Metrology Program, part of CHIPS for America, National Institute of Standards and Technology, U.S. Department of Commerce.

Tags: ai-model, detection-limits, dimensional-metrology, scanning-electron-microscopy, sem
Organization: National Institute of Standards and Technology
Data associated with "Population-resolved measurement of an avoided crossing of light-dressed states"

Data associated with the publication entitled: "Population-resolved measurement of an avoided crossing of light-dressed states."A two-level system coupled by a coherent field is a ubiquitous system in atomic and molecular physics. In the rotating wave approximation, the light-dressed states are well described by a simple 2x2 Hamiltonian which can be easily solved analytically and is thus used in quantum mechanics education and as a basis for intuition for more complicated systems. The solution to the Hamiltonian is an avoided crossing between the light-dressed ground and excited states. In experiments, the avoided crossing is probed spectroscopically, meaning only the energies, or eigenvalues of the Hamiltonian, are measured. Here, we present a measurement of the avoided crossing which also resolves population, thus indicating the amplitude coefficients of the eigenvectors of the Hamiltonian. We perform the measurement in Rydberg states of cold rubidium atoms, resolving the energies spectroscopically with our pump lasers and the populations of each state using selective field ionization.

Tags: autler-townes, avoided-crossing, cold-atoms, rubidium, rydberg
Organization: National Institute of Standards and Technology
Experimental data, refined configurations, and other necessary input to RMCProfile used in structural refinements reported in the paper "Emergent topological polarization textures in relaxor ferroelectrics" by M. Eremenko, V. Krayzman, S. Gorfman, A. Bosak, H. Y. Playford, P. A. Chater, B. Ravel, W. J. Laws, F. Ye, A. Minelli, B.-X. Wang, Z-G. Ye, M. G. Tucker, I. Levin.

This zip file contains  experimental data, refined configurations, and other necessary input to RMCProfile used in structural refinements reported in the paper "Emergent topological polarization textures in relaxor ferroelectrics" by M. Eremenko, V. Krayzman, S. Gorfman, A. Bosak, H. Y. Playford, P. A. Chater, B. Ravel, W. J. Laws, F. Ye, A. Minelli, B.-X. Wang, Z-G. Ye, M. G. Tucker, I. Levin.

Tags: advanced-materials
Organization: National Institute of Standards and Technology