Aggregation may refer to:
Business and economics
*
Aggregation problem
An ''aggregate'' in economics is a summary measure. It replaces a vector that is composed of many real numbers by a single real number, or a scalar. Consequently there occur various problems that are inherent in the formulations that use aggregate ...
(economics)
* Purchasing aggregation, the joining of multiple purchasers in a
group purchasing organization to increase their buying power
*
Community Choice Aggregation
Community Choice Aggregation (CCA), also known as Community Choice Energy, municipal aggregation, governmental aggregation, electricity aggregation, and community aggregation, is an alternative to the investor owned utility energy supply system in ...
, the joining of geographically contiguous communities to bypass a conventional energy utility monopoly and seek a greener energy service
Computer science and telecommunication
*
Aggregate function, a type of function in data processing
* Aggregation, a form of
object composition in object-oriented programming
*
Link aggregation
In computer networking, link aggregation is the combining ( aggregating) of multiple network connections in parallel by any of several methods, in order to increase throughput beyond what a single connection could sustain, to provide redundan ...
, using multiple Ethernet network cables/ports in parallel to increase link speed
*
Packet aggregation
{{Use mdy dates, date = March 2019
In a packet-based communications network, packet aggregation is the process of joining multiple packets together into a single transmission unit, in order to reduce the overhead associated with each transmissi ...
, joining multiple data packets for transmission as a single unit to increase network efficiency
* Route aggregation, the process of forming a
supernet
A supernetwork, or supernet, is an Internet Protocol (IP) network that is formed by aggregation of multiple networks (or subnets) into a larger network. The new routing prefix for the aggregate network represents the constituent networks in a s ...
in computer networking
* Aggregation, a process by which Australian country television markets were combined in the late 1980s and 1990s; see
Regional television in Australia
Natural sciences and statistics
*
Aggregation (ethology)
{{unreferenced, date=July 2013
In ethology, an aggregation is any form of gathering of organisms and the process of coming together. In some forms groups of unrelated species might form, in which interaction between members of the aggregation migh ...
, any gathering of organisms
* Aggregation of soil granules to form
soil structure
*
Particle aggregation, direct mutual attraction between particles (atoms or molecules) via van der Waals forces or chemical bonding
* The accumulation of
platelets to the site of a wound to form a platelet plug or a thrombus
*
Flocculation
Flocculation, in the field of chemistry, is a process by which colloidal particles come out of suspension to sediment under the form of floc or flake, either spontaneously or due to the addition of a clarifying agent. The action differs from pr ...
, a process where a solute comes out of solution in the form of floccules or flakes
*
Overdispersion
In statistics, overdispersion is the presence of greater variability (statistical dispersion) in a data set than would be expected based on a given statistical model.
A common task in applied statistics is choosing a parametric model to fit a giv ...
or statistical aggregation, where the variance of a distribution is higher than which we expect.
*
Aggregation pheromone
*
Protein aggregation
In molecular biology, protein aggregation is a phenomenon in which intrinsically-disordered or mis-folded proteins aggregate (i.e., accumulate and clump together) either intra- or extracellularly. Protein aggregates have been implicated in a wi ...
, the aggregation of mis-folded proteins
Other uses
*
Aggregation (linguistics)
In linguistics, aggregation is a subtask of natural language generation, which involves merging syntactic constituents (such as sentences and phrases) together. Sometimes aggregation can be done at a conceptual level.
Examples
A simple exampl ...
, a merging of syntactic constituents
*
''Aggregation'' (magazine), a 2010–2012 Canadian online magazine
See also
*
Aggregate (disambiguation)
Aggregate or aggregates may refer to:
Computing and mathematics
* collection of objects that are bound together by a root entity, otherwise known as an aggregate root. The aggregate root guarantees the consistency of changes being made within the ...
*
Aggregator (disambiguation) Aggregator may refer to:
*Job ads aggregator, a website that aggregates job ads from various job boards, multiposter sites, as well as from direct employers and recruiting agencies
*News aggregator, software or a website that aggregates news from va ...
, a web site or computer software that aggregates syndicated web content
*
Agrégation
In France, the ''agrégation'' () is a competitive examination for civil service in the French public education system. Candidates for the examination, or ''agrégatifs'', become ''agrégés'' once they are admitted to the position of ''professe ...
, in French-speaking countries, higher-level competitive examinations for teachers and professors
*
:Aggregation-based digital libraries, digital libraries that are primarily based on aggregation or harvesting of other digital libraries or repositories
*
Composition (disambiguation)
{{disambiguation