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1325 results found

Associated dataset for "Compatibilization of immiscible polyolefins with poly(1-butene)-g-polyethylene"

Data provided by  National Institute of Standards and Technology

Raw data for manuscript entitled "Compatibilization of immiscible polyolefins with poly(1-butene)-g-polyethylene." Includes chemical characterization or synthesized compatibilizers (e.g. size exclusion chromatography, nuclear magnetic resonance spectroscopy) and characterization of compatibilized polyolefin blends (e.g. uniaxial tensile elongation, vibrational spectroscopy).

Modified:

Black-box validation of Falcon key generation under numerical instability

Data provided by  National Institute of Standards and Technology

Software used in experiments to demonstrate the ability to validate Falcon (FN-DSA) implementations.

Modified:

Source: https://github.com/usnistgov/falcon-validation

frbca

Data provided by  National Institute of Standards and Technology

`{frbca}` is an R package supporting economic evaluation of functional recovery design for buildings. The goal of frbca is to conduct benefit-cost analysis (BCA) for buildings archetypes designed for functional recovery. The inputs include:

- Expected Annualized Losses (EALs) for (i) a baseline (code-conforming) design and (ii) recovery-based design interventions
- Structural and nonstructural costs for both (i) and (ii)
- A list of analysis parameters, including discount rate, time horizon, and economic analysis parameters such as business income

Modified:

Source: https://github.com/usnistgov/frbca.git

Standardized Approach for Assessing Wireless IoT Devices in Millimeter-Wave Industrial Work-Cell Channels

Data provided by  National Institute of Standards and Technology

In this paper, we present a standardized, repeatable test approach that replicates key features of measured industrial environments in a fully-characterized hybrid test chamber. The hybrid chamber consists of an anechoic chamber along with movable metallic spheres that provide discrete reconfigurable multipath components. The chamber is characterized by a synthetic-aperture system providing a reference measurement that captures the non-idealities of the chamber along with the intended spatial multipath, completing characterization of the test environment.

Modified:

Biospheric CO2 surface flux estimates from the Vegetation Photosynthesis & Respiration Model (VPRM) in the eastern USA and Canada: November 2016 to December 2021

Data provided by  National Institute of Standards and Technology

Monthly zip files from November 2016 to December 2021, with each zip containing
hourly .tif files with gridded CO2 fluxes at 0.02 degree resolution in an eastern
North American domain from 33° to 47° north and 92° to 67° west.

Annual zip files from November 2016 to December 2021, with each zip containing
hourly .tif files with gridded CO2 fluxes at 0.01 degree resolution in an eastern
North American domain from 38.4° to 39.6° north and 77.8° to 76.2° west.

Modified:

A computational framework (CHIPS-TB) for evaluating and comparing tight-binding parameterizations across diverse material systems relevant to semiconductor design, focusing on properties such as electronic bandgaps, band structures, and bulk modulus.

Data provided by  National Institute of Standards and Technology

The chipstb repository is a Python-based automation suite designed to systematically benchmark tight-binding electronic structure models (such as DFTB, TB3PY, and SlaKoNet) against high-accuracy Density Functional Theory (DFT) and experimental reference data. Built upon the JARVIS-Tools infrastructure, the code manages the complete workflow of retrieving crystal structures, executing semi-empirical calculations, and computing statistical error metrics for key properties like bandgaps and bulk moduli.

Modified:

Source: https://github.com/usnistgov/chipstb

Leakage Current Effects with Programmable Josephson Voltage Standards

Data provided by  National Institute of Standards and Technology

This work presents the results of evaluating and measuring the dc leakage effects associated with Programmable Josephson Voltage Standards (PJVS). Two types of leakage error can occur in PJVS systems. The first type involves leakage currents to Earth ground, which can result from the resistance of cable insulation and the bias electronics. The second type is related to the voltage divider effect, caused by potential leakage paths on the precision output leads. Both effects can impact the measurement accuracy of the PJVS and must be monitored regularly.

Modified:

Determination of Safe Intervention Windows for 18650 and 21700 Lithium-Ion Batteries from External Heating: Thermocouple Data

Data provided by  National Institute of Standards and Technology

The dataset contains thermocouple-based surface temperature measurements from two series of lithium-ion battery thermal-abuse experiments. The first series consists of continuous-heating tests, in which external heating was applied until ignition to quantify the time interval between the safety-valve breakage (SVB) event and subsequent ignition. The second series consists of interrupted-heating tests, where heating was deliberately stopped at different times after SVB to evaluate the safe intervention window and characterize delayed-ignition behavior.

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Answer Key for AM Bench AMB2025-01 Challenge Problems: Laser powder bed fusion 3D builds of nickel-based superalloy 625 with variations in feedstock chemistries

Data provided by  National Institute of Standards and Technology

This data publication includes the AM Bench answer key for two AMB2025-01 Challenge Problems that were posed to the AM modeling community:

Modified:

A dataset of synthetic additive manufacturing lack-of-fusion pores generated using a three-dimensional Generative Adversarial Network based on X-ray computed tomography images

Data provided by  National Institute of Standards and Technology

Synthetic additive manufacturing (AM) lack-of-fusion (LOF) pores are generated using a three-dimensional Generative Adversarial Network (3D-GAN) framework. The LOF pores, introduced by varying laser-based powder bed fusion (L-PBF) process parameters, were extracted from segmented X-ray computed tomography (XCT) scans previously published (doi:10.18434/M32162). The extracted pores served as training data for the 3D-GAN model, which was designed to learn and generate the complex morphologies characteristic of real AM pores.

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