activity (Meaning of)

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Activity
[UML] An activity in Unified Modeling Language (UML) is a major task that must take place in order to fulfill an operation contract. Activities can be represented in activity diagrams An activity can represent: Activities can be decomposed into subactivities, until at the bottom where we fin...
Found op http://en.wikipedia.org/wiki/Activity_(UML)
Activity
[software engineering] == See also == ...
Found op http://en.wikipedia.org/wiki/Activity_(software_engineering)
Activity
Activity may mean: The special spelling Activiti may mean: == See also == ...
Found op http://en.wikipedia.org/wiki/Activity
Activity
In effect means:- 'how much Radioactive material' - in terms of rate of transformations where 1 Becquerel (Bq) =1 transformation per second.
Found op http://www.ionactive.co.uk/glossary.html
activity
[n] - (chemistry) the capacity of a substance to take part in a chemical reaction 2. [n] - any specific activity
Found op http://www.webdictionary.co.uk/definition.php?query=activity
Activity
Attribute of an amount of a radionuclide. It is used to describe the rate at which transformations occur in it. Unit: becquerel, symbol: Bq. 1 Bq = 1 transformation per second.
Found op http://www.encyclo.co.uk/local/20474
Activity
The activity of a sample of radioactive material is the number of disintegrations per second taking place in that particular sample. The SI unit of activity is the becquerel (Bq)
Found op http://www.users.zetnet.co.uk/computing/MainPage/SecDepts/Physics/Resources
Activity
The rate at which a collection of radioactive nuclei decay. One curie corresponds to 3.7x10¹⁰ decays per second. See also: Curie, Radioactive Decay.
Found op http://www.diracdelta.co.uk/science/source/a/c/activity/source.html
Activity
The number of disintegrations per unit time inside a radioactive source. Expressed in becquerels
Found op http://www.encyclo.co.uk/local/20725
activity
(a) An effective concentration used in thermodynamic calculations in place of the actual concentration to allow equations developed for ideal solutions to be used to treat real solutions.
Found op http://antoine.frostburg.edu/chem/senese/101/glossary/a.shtml
activity
Activity (a) is a thermodynamic function used in place of concentration in equilibrium constants for reactions involving nonideal gases and solutions. For the species i activity is defined as a = f Ã— c where ai is the activity of the species i, ci is its molar concentration, and fi is a dimensio...
Found op http://www.ktf-split.hr/periodni/en/abc/a.html
activity
A measure of the chemical potential of a substance, where chemical potential is not equal to concentration, that allows mathematical relations equivalent to those for ideal systems to be used to correlate changes in an experimentally measured quantity with changes in chemical potential.
Found op http://www.encyclo.co.uk/local/20742

Activity
Ac·tiv'i·ty noun ; plural Activities [ Confer French activité , Late Latin activitas .] The state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force; as, an increasing variet...
Found op http://www.encyclo.co.uk/webster/A/24
activity
1. The state of being active, the ability to produce some effect, the extent of some function or action. ... 2. <chemistry> A thermodynamic quantity that represents the effective concentration of a solute in a nonideal solution, if concentrations are replaced by activities, the equations for e...
Found op http://www.mondofacto.com/facts/dictionary?activity
activity
noun any specific behavior; `they avoided all recreational activity`
Found op http://wordnetweb.princeton.edu/perl/webwn?s=activity
activity
(ak-tiv´ĭ-te) the quality or process of exerting energy or of accomplishing an effect. a thermodynamic quantity that represents the effective concentration of a solute in a non-ideal solution. Symbol a. the number of disintegrations per unit of a radioactive material. Symbol A. t...
Found op http://www.encyclo.co.uk/local/21001
Activity
• (n.) The state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force; as, an increasing variety of human activities.
Found op http://thinkexist.com/dictionary/meaning/activity/
activity
(from the article `liquid`) ...concentration of a substance may not be an accurate measure of its effectiveness, because of physical and chemical interactions, in which case an ...
Found op http://www.britannica.com/eb/a-z/a/14
activity
in radioactive-decay processes, the number of disintegrations per second, or the number of unstable atomic nuclei that decay per second in a given ... [1 related articles]
Found op http://www.britannica.com/eb/a-z/a/14
activity
1. the state of being active; the ability to produce some effect; the extent of some function or action. 2. a thermodynamic quantity that represents the effective concentration of a solute in a nonideal solution; if concentrations are replaced by activities, the equations for equilibrium constants, ...
Found op http://users.ugent.be/~rvdstich/eugloss/DIC/dictio02.html
activity
activity 1. The state of being active. 2. Energetic action or movement; liveliness. 3. A specified pursuit in which a person partakes; such as, an educational process or procedure intended to stimulate learning through actual experience. 4. The intensity of a radioactive source. 5. The ability t...
Found op http://www.wordinfo.info/words/index/info/view_unit/52/
Activity
[chemistry] In chemical thermodynamics, activity (symbol a) is a measure of the “effective concentration” of a species in a mixture, meaning that the species` chemical potential depends on the activity of a real solution in the same way that it would depend on concentration for an ideal ...
Found op http://en.wikipedia.org/wiki/Activity_(chemistry)
activity
1. radiation resulting from radioactive decay...
  Found op
2. activity
  A measure of the chemical potential of a substance, where chemical potential is not equal to concentration, that allows mathematical relations equivalent to those for ideal systems to be used to correlate changes in an experimentally measured quantity with changes in chemical potential
  Found op http://www.encyclo.co.uk/local/21115
3. activity
  quotient, for an amount of radionuclide in a particular energy state at a given time, of dN by dt, where dN is the expectation value of the number of spontaneous nuclear transitions from this energy state in the time interval of duration dt: NOTE - This quantity is expressed in becquerels (Bq).
  Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=393-14-12
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