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126526 results found

Volume Fraction and Temperature Measurements of 30 cm Acetone, Ethanol, Methanol, Pool Fires

Data provided by  National Institute of Standards and Technology

This dataset documents a series of time-averaged gas species measurements made along the centerline of methanol, ethanol, and acetone pool fires steadily burning in a quiescent environment. All gas species measurements are obtained using a Gas Chromatograph/ Mass Spectrometer System (GC/MS). Measurements were made at different heights along the centerline of the fire and repeated at least twice for each location. Gas species volume fractions were determined via the GC/MS using predetermined calibration factors.

Tags: Acetone,Ethanol,Gas species measurements,Methanol,Liquid Pool fires

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Public Sector: Public Sector Surveys

Data provided by  United States Census Bureau

The Public Sector Annual Surveys and Census of Governments identifies the scope and nature of the nation's state and local government sector; provides official counts of U.S. governments and authoritative benchmark figures of public finance and public employment.

Tags: census

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Source: http://api.census.gov/data/timeseries/govs

Residential Heat Pump Fault Detection and Diagnosis Research Data

Data provided by  National Institute of Standards and Technology

Work by Purdue and NIST has shown that different system types behave differently when exposed to the same type of fault at the same intensity; therefore, a better understanding of fault effects on the performance of different systems is needed. The data referenced here contains measurements of the fault-free and fault performance of two different heat pumps; a 14 SEER heat pump and a 16 SEER air-conditioner.

Tags: Fault detection and diagnosis data,heat pump data,air-conditioner data,cooling mode data

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Source: https://doi.org/10.18434/M32132

A Study of Timing Constraints and SAS Overload of SAS-CBSD Protocol in the CBRS Band

Data provided by  National Institute of Standards and Technology

This research work studied the effect of timing constraint and overloading of Spectrum Access System (SAS) on the SAS-CBSD protocol. Specifically, it studies how Heartbeat and Grant Request fail as number of CBSDs served by a SAS becomes large for a given service rate. It also looks at the time taken by CBSDs to vacate a channel (on which an incumbent has appeared) at different Heartbeat Interval. These study results are captured in the following files.

Tags: 3.5 GHz; CBRS; SAS-CBSD protocol,Heartbeat Interval;

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Source code for labbench 0.20 release

Data provided by  National Institute of Standards and Technology

This is the source code package for the labbench python module, version 0.20, which is its first public release. The purpose of labbench is to streamline and organize complicated laboratory automation tasks that involve large-scale benchtop automation, concurrency, and/or data management. It is built around a system of wrappers that facilitate robust, concise exception handling, type checking, API conventions, and synchronized device connection through python context blocks.

Tags: Laboratory automation

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Aged and unaged PBIA-based copolymer testing for soft body armor applications

Data provided by  National Institute of Standards and Technology

Traditionally, soft body armor has been made from materials such as poly(p-phenylene terephthalamide) (PPTA) and ultra-high molar mass polyethylene (UHMMPE). However, to diversify the fiber choices in the United States body armor market, copolymer fibers based on the combination of 5-amino-2-(p-aminophenyl) benzimidazole (PBIA) and PPTA were introduced. Little is known regarding the long-term stability of PBIA fibers, but as condensation polymers, they have potential sensitivity to moisture and humidity.

Tags: 5-amino-2-(p-aminophenyl) benzimidazole,PBIA,PPTA,body armor,single fiber tensile testing,ballistic materials,aramid fibers,environmental degradation,strength,mechanical testing,hydrothermal ageing

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Evaluating Uncertainty of Microwave Calibration Models from Regression Residuals

Data provided by  National Institute of Standards and Technology

The data used to generate the graphs in figures 1-9 of the paper "Evaluating Uncertainty of Microwave Calibrations from Regression Residuals".The full citation is D. F. Williams, B. F. Jamroz, J. D. Rezac and R. D. Jones, "Evaluating Uncertainty of Microwave Calibration Models With Regression Residuals," in IEEE Transactions on Microwave Theory and Techniques, vol. 68, no. 6, pp. 2454-2467, June 2020, doi: 10.1109/TMTT.2020.2983358.The files are named as follows: 1.

Tags: Confidence intervals,coupling corrections,on-wafer measurement,prediction intervals.

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NIST nanocalorimeter calibration virtual instruments

Data provided by  National Institute of Standards and Technology

These software are used to control an instrument that makes measurements and calculates calibration coefficients for NIST nanocalorimeters. Please cite the related paper "Practical Guide to the Design, Fabrication and Calibration of NIST Nanocalorimeters" by Feng Yi, Michael D. Grapes, and David A. LaVan in the Journal of Research of the National Institute of Standards and Technology, Volume 124 (in press).

Tags: nanocalorimeter,nanocalorimetry,calibration,software,virtual instrument

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Source: https://doi.org/10.18434/M32117

American Community Survey: 1-Year Estimates: Data Profiles 1-Year

Data provided by  United States Census Bureau

The American Community Survey (ACS) is an ongoing survey that provides data every year -- giving communities the current information they need to plan investments and services. The ACS covers a broad range of topics about social, economic, demographic, and housing characteristics of the U.S. population. Much of the ACS data provided on the Census Bureau's Web site are available separately by age group, race, Hispanic origin, and sex.

Tags: census

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Source: http://api.census.gov/data/2005/acs/acs1/profile

American Community Survey: 1-Year Estimates: Data Profiles 1-Year

Data provided by  United States Census Bureau

The American Community Survey (ACS) is an ongoing survey that provides data every year -- giving communities the current information they need to plan investments and services. The ACS covers a broad range of topics about social, economic, demographic, and housing characteristics of the U.S. population. Much of the ACS data provided on the Census Bureau's Web site are available separately by age group, race, Hispanic origin, and sex.

Tags: census

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Source: http://api.census.gov/data/2006/acs/acs1/profile