activity

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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 ?
Relate New Activities to Previous Student Experience One of the best ways to add interest to a classroom activity is to integrate local content.
DoDAF operational views are supposed to focus on activities and functions, not on organizations.
This policy was later confirmed in a court decision, even though the taxpayer was ultimately subject to corporation business tax because its activities exceeded mere delivery; see Chester A.
Balance activities might include family vacations, special events, and outdoor leisure activities such as sailing, camping, and fishing.
The next step in the process was to discuss different themes and activities which would be planned for the semester.
19) Researchers used the theory to counter the "rape supportive culture" belief and show that not all women have the same risk of sexual assault based on their repetitious activities.
6) These patterns can be exhibited through large-muscle movement activities such as marching, walking, swinging arms, running, clapping and tapping.
However, we also need to examine how the physical inactivity industries market their products to adults and children through advertisements for televisions, DVDs, video games, movies, and other sedentary activities.
If MSB activities are identified, CPAs must inform their clients of federal requirements for registration, reporting and compliance programs.
The domestic manufacturers' deduction permits a phased-in deduction of a specified percentage of a business's "qualified production activities income" or its taxable income, whichever is lower.
Insurance Sales Activities and Consumer Protection in Sales of Insurance.
Career development activities by professional school counselors at the elementary, middle, and high school levels can help students with mental retardation make meaningful career choices as adults.

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