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Data Central
Data provided by National Telecommunications and Information Administration
Home to NTIA data and analysis on computer and Internet use in the United States. Since November 1994, NTIA has periodically sponsored data collections on Internet use and the devices Americans use to go online as a supplement to the Census Bureau’s annual Current Population Survey (CPS); analyzed the data; and reported the findings. In recent years, NTIA has also linked to the raw datasets on the Census Bureau website.
Tags: blog,census,cps,data central,
Modified: 2024-02-22
Views: 0
NIST Atomic Spectra Database - SRD 78
Data provided by National Institute of Standards and Technology
This database provides access and search capability for NIST critically evaluated data on atomic energy levels, wavelengths, and transition probabilities that are reasonably up-to-date. The Atomic Spectroscopy Data Center has carried out these critical compilations. The Data Center is located in the Physical Measurement Laboratory at the National Institute of Standards and Technology (NIST).
Tags: cesium,chlorine,chromium,cobalt,columbium,copernicium,copper,curium,darmstadtium,database,deuterium,doubly-charged,dubnium,dysprosium,einsteinium,element,energy levels,erbium,europium,fermium,flerovium,fluorine,francium,gadolinium,gallium,germanium,gold,ground states,hafnium,hassium,helium,holmium,hydrogen,indium,iodine,ionization potentials,ionization-energies,ionization-limits,ionized-atoms,iridium,iron,mendelevium,mercury,molybdenum,multiply-charged,neodymium,neon,neptunium,neutral,nickel,niobium,nitrogen,nobelium,osmium,oxygen,palladium,phosphorus,platinum,plutonium,polonium,potassium,praseodymium,promethium,protactinium,quadruply-charged,radium,rhenium,rhodium,roentgenium,rubidium,ruthenium,rutherfordium,samarium,scandium,seaborgium,selenium,silicium,silicon,silver,singly-charged,sodium,spectra,spectral lines,spectroscopy,spectrum,strontium,sulfur,sulphur,tantalum,technetium,tellurium,terbium,thallium,thorium,thulium,tin,titanium,transition probabilities,triply-charged,tritium,tungsten,ununbium,ununhexium,ununoctium,ununpentium,ununquadium,ununseptium,ununtrium,unununium,uranium,vanadium,wavelengths,xenon,ytterbium,yttrium,zinc,zirconium,krypton,kurchatovium,lawrencium,lanthanum,lead,lithium,livermorium,lutetium,magnesium,manganese,meitnerium,Atomic,Atomic Spectroscopy,Radon,actinium,aluminium,aluminum,americium,antimony,argon,arsenic,astatine,atom,atomic physics,atomic property,atomic-ions,barium,berkelium,beryllium,bismuth,bohrium,boron,bromine,cadmium,calcium,californium,carbon,cerium,
Modified: 2024-02-22
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SRM 1632d Trace Elements in Coal (Bituminous)
Data provided by National Institute of Standards and Technology
Standard Reference Material 1632d Trace Elements in Coal (Bituminous) - This Standard Reference Material (SRM) is intended primarily for use in the evaluation of techniques used in the analysis of coals and materials of a similar matrix. A unit of SRM 1632d consists of 50 g of bituminous coal that was ground to pass a 250 µm (60 mesh) sieve, homogenized, bottled under an argon atmosphere, and sealed in an aluminized bag. This data is public in the Certificate of Analysis for this material.
Tags: SRM,Standard Reference Material,coal,sulfur,mercury,chlorine,trace elements,Energy,
Modified: 2024-02-22
Views: 0
SRM 1633c Trace Elements in Coal Fly Ash
Data provided by National Institute of Standards and Technology
SRM 1633c Trace Elements in Coal Fly Ash - This Standard Reference Material (SRM) is intended for use in the evaluation of analytical methods for the determination of constituent elements in coal fly ash or materials of a similar matrix. SRM 1633c is a bituminous coal fly ash that was sieved through a nominal sieve opening of 74 µm (200 mesh) and then blended to assure homogeneity. A unit of SRM 1633c consists of 75 g of powdered material. This data is public in the Certificate of Analysis for this material.
Tags: SRM,Standard Reference Material,coal fly ash,sulfur,mercury,chlorine,trace elements,Energy,
Modified: 2024-02-22
Views: 0
SRM 1635a Trace Elements in Coal (Subbituminous)
Data provided by National Institute of Standards and Technology
SRM 1635a Trace Elements in Coal (Subbituminous) - This Standard Reference Material (SRM) is intended primarily for the evaluation of techniques used in the analysis of coals and materials of a similar matrix. A unit of SRM 1635a consists of 50 g of subbituminous coal that was ground to pass a 250 µm (60 mesh) sieve, homogenized, bottled under an argon atmosphere, and sealed in an aluminized bag. This data is public in the Certificate of Analysis for this material.
Tags: SRM,Standard Reference Material,coal,sulfur,mercury,chlorine,trace elements,Energy,
Modified: 2024-02-22
Views: 0
SRM 2682c Subbituminous Coal (Nominal Mass Fraction 0.5 % Sulfur)
Data provided by National Institute of Standards and Technology
Standard Reference Material 2682c Subbituminous Coal (Nominal Mass Fraction 0.5 % Sulfur) - This Standard Reference Material (SRM) is intended primarily for use in the evaluation of techniques used in the analysis of coals and materials of a similar matrix. A unit of SRM 2682c consists of 50 g of subbituminous coal that was ground to pass a 250 µm (60 mesh) sieve, homogenized, packaged in an amber glass bottle under an argon atmosphere, and then sealed in an aluminized bag. This data is public in the Certificate of Analysis for this material.
Tags: SRM,Standard Reference Material,coal,sulfur,mercury,chlorine,Energy,
Modified: 2024-02-22
Views: 0
SRM 2683c Bituminous Coal (Nominal Mass Fraction 2 % Sulfur)
Data provided by National Institute of Standards and Technology
SRM 2683c Bituminous Coal (Nominal Mass Fraction 2 % Sulfur) - This Standard Reference Material (SRM) is intended primarily for use in the evaluation of techniques employed in the determination of sulfur, mercury, and chlorine in coal and materials of a similar matrix. A unit of SRM 2683c consists of 50 g of bituminous coal ground to pass a 250 µm (60 mesh) sieve, homogenized, packaged in an amber glass bottle under an argon atmosphere, and sealed in an aluminized bag. This data is public in the Certificate of Analysis for this material.
Tags: SRM,Standard Reference Material,coal,sulfur,mercury,chlorine,Energy,
Modified: 2024-02-22
Views: 0
SRM 2684c Bituminous Coal (Nominal Mass Fraction 3 % Sulfur)
Data provided by National Institute of Standards and Technology
Standard Reference Material 2684c Bituminous Coal (Nominal Mass Fraction 3 % Sulfur) - This Standard Reference Material (SRM) is intended primarily for use in the evaluation of techniques used in the analysis of coals and materials of a similar matrix. A unit of SRM 2684c consists of 50 g of bituminous coal that was ground to pass a 212 µm (70 mesh) sieve, homogenized, packaged in an amber glass bottle under an argon atmosphere, and then sealed in an aluminized bag. This data is public in the Certificate of Analysis for this material.
Tags: SRM,Standard Reference Material,coal,sulfur,mercury,chlorine,Energy,
Modified: 2024-02-22
Views: 0
SRM 2685c Bituminous Coal (Nominal Mass Fraction 5 % Sulfur)
Data provided by National Institute of Standards and Technology
This Standard Reference Material (SRM) is intended primarily for use in the evaluation of techniques used in the analysis of coals and materials of a similar matrix. A unit of SRM 2685c consists of 50 g of bituminous coal ground to pass a 250 ?m (60 mesh) sieve, homogenized, and packaged in an amber glass bottle under an argon atmosphere, and sealed in an aluminized bag.
Tags: SRM,Standard Reference Material,coal,sulfur,mercury,chlorine,Energy,
Modified: 2024-02-22
Views: 0
SRM 2692c Bituminous Coal (Nominal Mass Fraction 1 % Sulfur)
Data provided by National Institute of Standards and Technology
SRM 2692c Bituminous Coal (Nominal Mass Fraction 1 % Sulfur) - This Standard Reference Material (SRM) is intended primarily for use in the evaluation of techniques employed in the determination of sulfur, mercury, chlorine, and ash content in coal and materials of a similar matrix. A unit of SRM 2692c consists of 50 g of bituminous coal ground to pass a 250 µm (60 mesh) sieve, homogenized, and packaged in an amber glass bottle. This data is public in the Certificate of Analysis for this material.
Tags: SRM,Standard Reference Material,coal,sulfur,mercury,chlorine,Energy,
Modified: 2024-02-22
Views: 0