This ontology contains general terms for characteristics that are measured either quantitatively or qualitatively, including physical characteristics, behavioral characteristics, and administrative characteristics.
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Algae Life Stage
The developmental stage of a given algae.
measures how easily electricity flows along a certain path through an electrical element. The SI derived unit for electrical conductance is the siemens
is a measure of a material's ability to conduct an electric current. Units are siemens per meter
Fish Life Stage
The developmental stage of a given fish.
Irradiance, radiant emittance, and radiant exitance are radiometry terms for the power per unit area of electromagnetic radiation at a surface. "Irradiance" is used when the electromagnetic radiation is incident on the surface. "Radiant exitance" or "radiant emittance" is used when the radiation is emerging from the surface. The SI units for all of these quantities are watts per square meter (W/m2) (wikipedia). All of these quantities characterize the total amount of radiation present, at all frequencies. It is also common to consider each frequency in the spectrum separately. When this is done for radiation incident on a surface, it is called spectral irradiance, and has SI units W/m3, or commonly W·m−2·nm−1.
Life Stage
The developmental stage of life of a given organism.
Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction. It describes the amount of light that passes through or is emitted from a particular area, and falls within a given solid angle. The SI unit for luminance is candela per square metre (cd/m2).
Mammal Life Stage
The developmental stage of a given mammal.
Molality amount of substance of solute B in a solution divided by the mass of the solvent: Often favored because measurements of mass are more precise than measurements of volume.
The number of photons striking an area per unit time. This could be probably also be called a PhotonArealDensityRate.
Plant Life Stage
The developmental stage of a given plant.
Radiance and spectral radiance are radiometric measures that describe the amount of light that passes through or is emitted from a particular area, and falls within a given solid angle in a specified direction. They are used to characterize both emission from diffuse sources and reflection from diffuse surfaces. The SI unit of radiance is watts per steradian per square metre (W·sr−1·m−2).