activity

(redirected from activity gross income)
Also found in: Dictionary, Thesaurus, Medical, Legal, Financial.

activity

1. the number of disintegrations of a radioactive substance in a given unit of time, usually expressed in curies or disintegrations per second
2. 
a. the capacity of a substance to undergo chemical change
b. the effective concentration of a substance in a chemical system. The absolute activity of a substance B, λB, is defined as exp (μBRT) where μB is the chemical potential

activity

[‚ak′tiv·əd·ē]
(computer science)
The use or modification of information contained in a file.
(nuclear physics)
The intensity of a radioactive source. Also known as radioactivity.
(physical chemistry)
A thermodynamic function that correlates changes in the chemical potential with changes in experimentally measurable quantities, such as concentrations or partial pressures, through relations formally equivalent to those for ideal systems.
(systems engineering)
The representation in a PERT or critical-path-method network of a task that takes up both time and resources and whose performance is necessary for the system to move from one event to the next.

activity

In CPM terminology, a task or item of work that must be performed in order to complete a project.
References in periodicals archive ?
An amount of the taxpayer's gross income from each significant participation passive activity for the taxable year equal to a ratable portion of the taxpayer's net passive income from such activity for the taxable year shall be treated as not from a passive activity if the taxpayer's passive activity gross income from all significant participation passive activities for the taxable year .
If the rules apply, the passive activity gross income and passive activity deductions from the activity are determined under the following rules: (1) the applicable percentage of the taxpayer's share for the taxable year of each item of the lending entity's self-charged interest income is treated as passive activity gross income from the activity; (2) the "applicable percentage" of the taxpayer's share for the taxable year of each deduction for interest expense that is properly allocable to the lending entity's self-charged interest income is treated as a passive activity deduction from the activity.