AndreaBozzo/ceres-open-data-index huggingface dataset:
Trojan Detection Software Challenge - nlp-question-answering-aug2023-train

nlp-question-answering-aug2023-trainThis is the train data used to evaluate trojan detection software solutions. This data, generated at NIST, consists of natural language processing (NLP) AIs trained to perform extractive question answering on English text. A known percentage of these trained AI models have been poisoned with a known trigger which induces incorrect behavior. This data will be used to develop software solutions for detecting which trained AI models have been poisoned via embedded triggers.

Tags: trojan-detection-artificial-intelligence-ai-machine-learning-adversarial-machine-learning
Organization: National Institute of Standards and Technology
Data and code for "Predicting the toughness of compatibilized polymer blends"

This code and example files were used to run the self-consistent field theory parameterization in the publication "Predicting the toughness of compatibilized polymer blends" by Robert J. S. Ivancic (OrcID: https://orcid.org/0000-0001-9969-2534, National Institute of Standards and Technology, Material Measurement Laboratory, Division 642, Group 1)  and Debra J. Audus (OrcID: https://orcid.org/0000-0002-5937-7721, National Institute of Standards and Technology, Material Measurement Laboratory, Division 642, Group 1). The data/README.md and code/README.md files describe the code and dataset.Abstract from the publication : Polymer blends can yield superior materials by merging the unique properties of their components. However, these mixtures often phase separate, leading to brittleness. While compatibilizers can toughen these blends, their vast design space makes optimization difficult. Here, we design a model to predict the toughness of compatibilized glassy polymer mixtures. This theory reveals thatcompatibilizers increase blend toughness by creating molecular bridges that stitch the interface together. We validate this theory by directly comparing its predictions to extensive molecular dynamics simulations in which we vary polymer incompatibility, chain stiffness, compatibilizer areal density, and blockiness of copolymer compatibilizers. We then parameterize the model using self-consistent field theory and confirm its ability to make predictions for practical applications through comparison with simulations and experiments. These results suggest the theory can optimize compatibilizer design for industrial glassy polymer blends 	extit{in silico} while providing microscopic insight, allowing for the development of next-generation mixtures.

Tags: compatibilizers, molecular-dynamics, polymer-blends, recycling, toughness
Organization: National Institute of Standards and Technology
Data for "Estimating Uncertainty in Robot Kinematics and Pose Measurements with Expectation-Maximization"

Included here are figures and relevant data for the work "Estimating Uncertainty in Robot Kinematics and Pose Measurements with Expectation-Maximization". We present a method to validate the measurement uncertainty of a metrology instrument without a priori estimates in the context of a kinematic calibration using Expectation-Maximization methods and extend our results to characterize post-calibration pose uncertainty for the manipulator throughout a workspace. This technique permits the robot kinematic model to be fitted simultaneously with a parameterized uncertainty model derived from direct-drive laser tracker kinematics. We demonstrate the performance of this algorithm in a simulated and experimental setting, achieving 6.4um position and 70.8 urad rotation error for kinematic calibration and statistically validating the fitted uncertainty model for points throughout the calibrated workspace.

Tags: hybrid-manipulator, laser-tracker-uncertainty, pose-uncertainty, robot-calibration
Organization: National Institute of Standards and Technology
Data for figures in the AMTA 2023 conference paper titled "NIST Antenna Gain and Polarization Calibration Service Reinstatement"

After a five-year renovation of the National Institute of Standards and Technology (NIST) Boulder, CO, antenna measurement facility, the Antenna On-Axis Gain and Polarization Measurements Service SKU63100S was reinstated with the Bureau International des Poids et Mesures (BIPM). In addition to an overhaul of the antenna facility, the process of reinstatement involved a comprehensive measurement campaign of multiple international check-standard antennas over multiple frequency bands spanning 8 GHz to 110 GHz. Through the measurement campaign, equivalency with 16 National Metrology Institutes (NMIs) and continuity to several decades of antenna gain values was demonstrated. The renovation process, which included implementing new robotic antenna measurement systems, control software, and data processing tools is discussed. Equivalency results and uncertainties are presented and compared to check standard historical values. Data sets included here are for figures 6, 7 and 8 for extrapolation data curves at the center frequencies, 10 GHz, 15 GHz, and 95 GHz.  Data sets for Table 2 show antenna Gain equivalency values and uncertainties for each antenna with serial number for each antenna. Data set for Table 3 shows polarization equivalency values  and uncertainties for each antenna with serial number for each antenna. Table 4 shows uncertainty analysis for gain and polarization equivalency results.

Tags: scattering-parameters-s-parameters-gain-polarization-far-field-pattern-near-field-pattern-anten
Organization: National Institute of Standards and Technology
NOAA/WDS Paleoclimatology - Brubaker - Lake Coeur d'Alene - PIPO - ITRDB ID001

This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Tree Ring. The data include parameters of tree ring with a geographic location of Idaho, United States Of America. The time period coverage is from 238 to -26 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.

Tags: biological records, climate indicators, continent, doc/noaa/nesdis/ncei, earth science, idaho, lake coeur d'alene, land records, latitude 47.63, longitude -116.47, material: null, national centers for environmental information, nesdis, noaa, north america, paleoclimate, paleoclimate indicators, pinus ponderosa douglas ex c. lawson, pipo, ponderosa pine, tree ring, tree rings, tree-ring, u.s. department of commerce, united states of america, western yellow pine, what: age, what: number of samples, what: total ring width, what: tree ring standardized growth index, width
Organization: National Oceanic and Atmospheric Administration, Department of Commerce
Effects of as-built surface with varying number of contour passes on high-cycle fatigue behavior of additively manufactured nickel alloy 718

Abstract (from the manuscript): High cycle fatigue life of laser-powder bed fusion (L-PBF) parts depends on several factors; as-built surfaces, when present, are a particular concern. This work measures as-built L-PBF surfaces with X-ray computed tomography, and uses rotating beam fatigue (RBF) testing to measure high cycle fatigue life. Surfaces with different, but consistent, characteristics are achieved by build in vertical specimens and changing only the number of contour passes. In this way, specimens with three different levels of surface roughness are compared to standard polished specimens. The results from this show that surface roughness increases with decreasing number of contour passes, but the impact on fatigue lifetime is not trivially related.  Electron microscopy and x-ray computed tomography images show multiple initiation points and complex surface topology, but that surface feature depth is not necessarily correlated to failure location. Two primary conclusions are that 1) for the case of as-built surfaces loaded in bending, one contour pass is sufficient to achieve peak as-built performance, and even zero contour passes was not statistically significantly different from two passes; 2) surface feature depth, even when measured using metal-penetrating imaging, is not strongly associated with failure location in our data. When assessing AM surfaces, more factors (e.g., grain orientation) may be required to mechanistically understand the performance implications.This dataset is comprised of four main types of data: 1. Build data, including CAD files and heat treatment logs. 2. Fatigue data, from RBF testing  tabulated in the form of measured stresses and forces, and fatigue lives (cycle counts). 3. Fractography data, in the form of SEM and optical images of failure surfaces after RBF testings. 4. X-ray Computed Tomography data, comprising 3D images, associated image processing codes, and tabulated data describing the surface profiles and deepest surface notches for 6 specimens of particular interest. 

Tags: additive-manufacturing, as-built, laser-powder-bed-fusion, nickel-alloy-718, rotating-beam-fatigue, surface-roughness
Organization: National Institute of Standards and Technology
Who Is That? Perceptual Expertise on Other-Race Face Comparisons, Disguised Face Comparisons, and Face Memory - Analysis Script

The GitHub folder contains the scripts to replicate the analysis corresponding to the paper Who Is That? Perceptual Expertise on Other-Race Face Comparisons, Disguised Face Comparisons, and Face Memory (https://doi.org/10.31234/osf.io/s87na). The data in the paper was collected from forensic facial professionals (examiners and reviewers) and undergraduate students. Participants rated the similarity of faces and chose which faces they memorized. Student data can be obtained by contacting Prof. Alice J. O'Toole at The University of Texas at Dallas; forensic facial professional data can be obtained by contacting Dr. Amy N. Yates at NIST.The file WhoIsThat.Rmd is the code used for figures and analysis in the paper, e.g., the Mann-Whitney tests and violin plots. The resultant output can be seen in the file WhoIsThat.html.

Tags: biometrics, disguised-face-identification, face-identification, face-memory, face-recognition, forensic-facial-examiners, forensic-facial-reviewers, forensics, other-race-face-identification
Organization: National Institute of Standards and Technology
Microstrip and Grounded CPW Calibration Kit Comparison for On-Wafer Transistor Characterization from 220 GHz to 325 GHz

Data published in paper "Microstrip and Grounded CPW Calibration Kit Comparison for On-Wafer Transistor Characterization from 220 GHz to 325 GHz"We investigated the effect of two uncertainty sources, probe placement error and capacitance per unit length variation, on transistor S-parameter measurements calibrated with two different mTRL calibration kits. We propagated these uncertainties onto common-emitter (CE) and common-base (CB) heterojunction-bipolar-transistor (HBT) measurements to show how the calibration kit selection affects the accuracy of the resulting S-parameter transistor measurements and calculated characterization metrics such as K factor and maximum available gain (MAG). The measured data are from Sparameters taken from a Vector Network Analyzer (VNA). We used WR3.4 extender heads connected to a VNA and measured S-parameters from 210 GHz to 325 GHz with a 500 MHz frequency step. The probes were landed manually for each of calibration standard measurements and transistor measurements with an approximate probe landing error of +/- 10 um. Each raw measurement was stored and corrected later in post-processing using the mTRL calibration algorithm in the Microwave Uncertainty Framework (MUF). In this dataset, we also included the capacitance per unit length from a commercial Electromagnetic (EM) solver of the two transmission line cross sections used in the calibration kits. We varied the geometric and material properties of the transmission lines to obtain the histograms.

Tags: calibration, common-base, common-emitter, coplanar-waveguide, hbt, microstrip, on-wafer, uncertainty, wr-3-4
Organization: National Institute of Standards and Technology
NFIMM (NIST Fingerprint Image Metadata Modifier) software written in C++ which updates image (file) metadata information for BMP and PNG compression formats leaving original image file unchanged

NFIMM is a software library written in C++ and runs on all the major computer platforms, for example, linux.  It updates the header metadata for BMP and PNG image files while leaving the image data unchanged.The image and the metadata to be updated is supplied by the NFIMM using-software:- Required  - source image file path or bytes-stream  - source image compression format  - destination image sample rate  - destination image sample rate units- Optional  - source image sample rate and units  - PNG custom text: Description, Author, Creation Time, etc.Note that the destination image compression format is constrained to be the same as the source image and therefore is not a required input parameter.NFIMM inputs the source image from the using-software either as a path to the file or as the contents of a buffer already in memory.  It makes the modified image available to the user in a new buffer or provides a method for the user to save the modified image to disk.NFIMM may be used stand-alone to update an image file when the resolution information is known to be incorrect.NFIMM was developed specifically to support NFIR (NIST Fingerprint Image Resampler) executable.  NFIR requires the target image resolution value to perform the resampling; this resolution value is used to update the image metadata.

Tags: bmp, compression, file-header, format, image-metadata, png, software-library
Organization: National Institute of Standards and Technology
Cutting Force Monitoring Experiment 01

An experiment was set up at the University of Tennessee Knoxville (UTK) to test methods for estimating the cutting forces in real time within machine tools for any spindle speed, force profile, tool type, and cutting conditions. Before cutting, a metrology suite and instrumented tool holder were used to induce magnetic forces during spindle rotation, while on-machine vibrations, magnetic forces, and error motions were measured for various combinations of speeds and forces. A model may then relate the measured accelerations to the forces, such that during cutting, on-machine measured vibrations may be used in the model to estimate the cutting forces in real time. To test this process, the metrology suite and the instrumented tool holder were removed, except that the on-machine accelerometers remained. A dynamometer was then set up on the worktable with a workpiece to independently measure cutting forces during machining. Various cutting passes were performed with different mills while the dynamometer data and accelerometer data were collected. Even though considerable research has been conducted to estimate cutting forces with accelerometers and measured FRFs, one main challenge remains: a method must be created to estimate the cutting forces in real-time for any spindle speed, force profile, tool type, and cutting conditions. This dataset can be used to develop or advance such methods for industrial adoption.

Tags: data-driven-dynamics, diagnostics, dynamics, frequency-response-function, industry-4-0, machine-tool, machining-processes, modeling, monitoring, sensing, smart-manufacturing
Organization: National Institute of Standards and Technology
Data and code for the paper, "Inverse Transform Sampling for Efficient Doppler-Averaged Spectroscopy Simulations"

This dataset represents the results of calculations of atomic absorption spectra for the case of two-color EIT. We compare computation methods, specifically Gaussian sampling, to find that one sampling method converges to smooth transmittance curves in less time than the other. We also include some example scripts which generate and plot the figure data.

Tags: atomic-physics, electric-field, fields-strength, receivers, rydberg-atoms, volts-meter
Organization: National Institute of Standards and Technology
ns-3 ORAN Module

This module for ns-3 implements the classes required to model a network architecture based on the O-RAN Alliance's specifications. These models include a Radio Access Network (RAN) Intelligent Controller (RIC) that is functionally equivalent to O-RAN's Near-Real Time (Near-RT) RIC, and reporting modules that attach to simulation nodes and serve as communication endpoints with the RIC in a similar fashion as the E2 Terminators in O-RAN.

Tags: artificial-intelligence, machine-learning, open-ran, ran-intelligent-controller
Organization: National Institute of Standards and Technology
Raw data used to investigate the use of Wi-Fi signals to monitor human respiratory motion.

Raw data used to investigate the use of Wi-Fi signals to monitor human respiratory motion. Data are from an anatomically correct breathing manikin. These data have been published in "Monitoring Respiratory Motion With Wi-Fi CSI: Characterizing Performance and the BreatheSmart Algorithm," DOI: 10.1109/ACCESS.2022.3230003Each figure from the publication is broken up into its own folder. Within each folder, the raw real/imaginary data from the Wi-Fi channel state information frames can be found. This can be used to recreate the figures from the publication, or to test different processing algorithms of interest to the user.A README file is available within the data set with additional guidance.

Tags: channel-state-information, deep-learning, lstm, mimo-ofdm, respiration-monitoring, respiratory-motion-classification, wi-fi
Organization: National Institute of Standards and Technology
Data Publication: Data from NIST IR "Report on VAMAS Round Robin of ISO 13067: Microbeam Analysis - Electron Backscatter Diffraction - Measurement of Average Grain Size"

This data publication includes electron backscatter diffraction (EBSD) data used to support the development of ISO 13067 "Microbeam Analysis - Electron Backscatter Diffraction - Measurement of Average Grain Size" as part of a Versailles Project on Advanced Materials and Standards (VAMAS) work area. EBSD data was collected on two commercially pure titanium samples. Two different scanning electron microscopes were used, and two staff independently performed measurements of 5 selected areas. The reports, data summaries, and raw data were provided back to the VAMAS work group for evaluation.  Methods, discussion, and data summaries from these data sets are contained in the referenced NIST Internal Report (NIST IR). The referenced National Physical Laboratory (NPL) report is a summary of the round robin.

Tags: ebsd, grain-size, iso, round-robin
Organization: National Institute of Standards and Technology
A Data-Driven Approach to Complex Voxel Predictions in Grayscale Digital Light Processing Additive Manufacturing Using U-nets and Generative Adversarial Networks

Digital light processing (DLP) vat photopolymerization (VP) additive manufacturing (AM) uses patterned UV light to selectively cure a liquid photopolymer into a solid layer. Subsequent layers are printed on to preceding layers to eventually form a desired 3 dimensional (3D) part. This data set characterizes the 3D geometry of a single layer of voxels (volume pixels) printed with photomasks assigned random intensity levels at every pixel. The masks are computer generated, then printed onto a glass cover slide. Geometry of the printed voxels is characterized by laser scanning confocal microscopy. The data were originally curated to train image-to-image U-net machine learning models to predict voxel scale geometry given arbitrary photomasks, as described in the publication "A Data-Driven Approach to Complex Voxel Predictions in Grayscale Digital Light Processing Additive Manufacturing Using U-nets and Generative Adversarial Networks". Data are provided in a raw (native microscope format and photomask image) and processed into aligned mask-print training pairs. A total of 1500 8 pixel × 8 pixel (i.e. 96 000 pixel interactions) training pairs are provided. Jupyter notebooks for various steps in process are also provided.

Tags: 3d-printing, additive-manufacturing, generative-adversarial-network, machine-learning, photopolymer
Organization: National Institute of Standards and Technology
Data for manuscript: Beating thermal noise in a dynamic signal measurement by a nanofabricated cavity-optomechanical sensor.

'Beating thermal noise in a dynamic signal measurement by a nanofabricated cavity-optomechanical sensor', Mingkang Wang, Diego J. Perez-Morelo, Georg Ramer, Georges Pavlidis, Jeffrey J. Schwartz, Liya Yu, Robert Ilic, Andrea Centrone, and Vladimir A. Aksyuk, Science Advances 9, eadf759, 2023.DOI:10.1126/sciadv.adf7595Thermal fluctuations often impose both fundamental and practical measurement limits on high-performance sensors, motivating the development of techniques that bypass the limitations imposed by thermal noise outside cryogenic environments. Here, we theoretically propose and experimentally demonstrate a measurement method that reduces the effective transducer temperature and improves the measurement precision of a dynamic impulse response signal. Thermal noise limited, integrated cavity-optomechanical atomic force microscopy probes are used in a photothermal induced resonance measurement to demonstrate an effective temperature reduction by a factor of ? 25; i.e., from room temperature down as low as ? 12 K, without cryogens. The method improves the experimental measurement precision and throughput by > 2x, approaching the theoretical limit of ? 3.5x improvement for our experimental conditions. The general applicability of this method to dynamic measurements leveraging thermal-noise-limited harmonic transducers will have a broad impact across a variety of measurement platforms and scientific fields.

Tags: cavity-optomechanical-sensing, nanomechanical-resonator, ptir, thermal-noise
Organization: National Institute of Standards and Technology
Simulated X-ray computed tomography (XCT) and ground truth images of cylindrical sample with randomly distributed spherical pores

X-ray computed tomography (XCT) datasets with known ground truth pores were developed using realistic XCT simulation. Non-overlapping spherical pores of varying sizes are randomly distributed in a cylindrical part near surfaces and within the core. Ground truth data, ground truth binary data, and reconstructed data for three different signal-to-noise ratios (SNRs) are provided. The data set can be used for evaluation and comparison of image segmentation/detection algorithms.

Tags: additive-manufacturing, defect, evaluation-metrics, flaw, ground-truth-data, image-segmentation, non-destructive-evaluation, x-ray-computed-tomography
Organization: National Institute of Standards and Technology
Data to accompany the paper entitled "Vapor and Liquid (p-rho-T-x) Measurements of Binary Refrigerant Blends Containing R-134a, R-1234yf, and R-1234ze(E)"

Data to accompany the paper "Vapor and Liquid (p-rho-T-x) Measurements of Binary Refrigerant Blends Containing R-134a, R-1234yf, and R-1234ze(E)" published in Journal of Chemical & Engineering Data. Included are experimental data for two compositions each of three binary refrigerant blends: R 1234yf + R134a, R-134a + R-1234ze(E), and R-1234yf + R-1234ze(E). Both the averaged data, which are presented in Tables 3-8 of the above manuscript, and the full replicate data, which are presented in Tables S1-S6 of the accompanying Supporting Information file, are included. 

Tags: density, hydrofluorocarbons, hydrofluoroolefins, refrigerant-blends
Organization: National Institute of Standards and Technology
NIST Infiltration Correlations for DOE Prototype Commercial Buildings

This workbook accompanies two publications [1] Evaluating Potential Benefits of Air Barriers in Commercial Buildings using NIST Infiltration Correlations in EnergyPlus DOI: 10.1016/j.buildenv.2021.107783 and [2] Implementing NIST Correlations: https://doi.org/10.6028/NIST.TN.2221-upd1

Tags: airflow-modeling, building-envelope-airtightness, commercial-buildings, contam, energy-modeling, energyplus, infiltration
Organization: National Institute of Standards and Technology