Aggregation may refer to:
Business and economics
*
Aggregation problem (economics)
* Purchasing aggregation, the joining of multiple purchasers in a
group purchasing organization
In the United States, a group purchasing organization (GPO) is an entity that is created to leverage the purchasing power of a group of businesses to obtain discounts from vendors based on the collective buying power of the GPO members.
Many GPO ...
to increase their buying power
*
Community Choice Aggregation, 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
In database management, an aggregate function or aggregation function is a function where multiple values are processed together to form a single summary statistic.
Common aggregate functions include:
* Average (i.e., arithmetic mean)
* Count ...
, a type of function in data processing
* Aggregation, a form of
object composition in object-oriented programming
*
Link aggregation, using multiple Ethernet network cables/ports in parallel to increase link speed
*
Packet aggregation, joining multiple data packets for transmission as a single unit to increase network efficiency
* Route aggregation, the process of forming a
supernet 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), any gathering of organisms
* Aggregation of soil granules to form
soil structure
In geotechnical engineering, soil structure describes the arrangement of the solid parts of the soil and of the Pore space in soil, pore space located between them. It is determined by how individual soil granules clump, bind together, and Soil a ...
*
Particle aggregation
Particle agglomeration refers to the formation of assemblages in a suspension (chemistry), suspension and represents a mechanism leading to the functional destabilization of colloidal systems. During this process, particles dispersed in the liquid ...
, direct mutual attraction between particles (atoms or molecules) via van der Waals forces or chemical bonding
* The accumulation of
platelet
Platelets or thrombocytes () are a part of blood whose function (along with the coagulation#Coagulation factors, coagulation factors) is to react to bleeding from blood vessel injury by clumping to form a thrombus, blood clot. Platelets have no ...
s to the site of a wound to form a platelet plug or a thrombus
*
Flocculation
In colloidal chemistry, flocculation is a process by which colloidal particles come out of Suspension (chemistry), suspension to sediment in the form of floc or flake, either spontaneously or due to the addition of a clarifying agent. The actio ...
, a process where a solute comes out of solution in the form of floccules or flakes
*
Overdispersion 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 proteins, intrinsically-disordered or mis-folded proteins aggregate (i.e., accumulate and clump together) either intra- or extracellularly. Protein aggre ...
, the aggregation of mis-folded proteins
Other uses
*
Aggregation (linguistics), 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
* Aggregate (data warehouse), a part of the dimensional model that is used to speed up query time by summarizing tables
* Aggregate analysis, a technique used in amortized analysis i ...
*
Aggregator (disambiguation), a web site or computer software that aggregates syndicated web content
*
Agrégation
In France, the () is the most competitive and prestigious examination for civil service in the French public education
A state school, public school, or government school is a primary school, primary or secondary school that educates all stu ...
, 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