Heterogeneity (disambiguation): Difference between revisions

Revision as of 04:37, 15 February 2007

Latest revision as of 17:29, 24 December 2020

(303 intermediate revisions by more than 100 users not shown)

Line 1:

{{wiktionary|heterogeneity|heterogeneous}}

{{Wiktionary}}

'''[[Heterogeneity]]''' is a diverseness of constituent structure.

'''Heterogeneity''' or '''heterogeneous''' may also refer to:

''Heterogeneous'' ({{IPA2|ˌhɛɾɚə'dʒiniəs}}, also {{IPA|[hɛɾɚo-]}} (American English)) means that something (an object or system) consists of a diverse range of different items. It is the [[antonym]] of ''[[wiktionary:Homogeneous|homogeneous]]'', which means that an object or system consists of many identical items. The term is often used in a [[science|scientific]] (such as a kind of [[catalyst]]), [[mathematics|mathematical]], [[sociology|sociological]] or [[statistics|statistical]] context.

==Data Chemistry analysis==

* [[Heterogeneity (statistics)|Heterogeneity in statistics]]

* [[Heterogeneity in economics]]

* [[Study heterogeneity]], a concept in statistics

* [[Heterogeneous relation]]

==Biology and medicine==

A heterogeneous compound, mixture, reaction or other such object is one that consists of many different items, which are often not easily sorted or separated, though they are clearly distinct.

* [[Heterogeneous condition]]s in medicine are those conditions which have several causes/etiologies

In* [[taxonomy]], aA ''heterogeneous taxon'' is, a [[taxon]] that contains a great variety of individuals or sub-taxa; usually this implies that the taxon is an artificial grouping.

In* genetics[[Genetic heterogeneity refers to]], multiple origins ofcausing athe same disorder in different individuals.

* [[Allelic heterogeneity]], different mutations at the same locus causing the same disorder.

==Chemistry==

A ''heterogeneous mixture'' is a [[mixture]] of two or more [[Chemical compound|compounds]].

In*A chemical[[Homogeneous kinetics,and aheterogeneous ''reactions|heterogeneous reaction'']], isa onereaction in chemical kinetics that takes place at the interface of two or more phases, i.e. between a solid and a gas, a liquid and a gas, or a solid and a liquid.

*A [[heterogeneous catalysis]], one in which the catalyst is in a different phase from the substrate

==Ecology==

In chemical kinetics, a ''heterogeneous reaction'' is one that takes place at the interface of two or more phases, i.e. between a solid and a gas, a liquid and a gas, or a solid and a liquid.

* Heterogeneity in [[landscape ecology]], the measure of how different parts of a landscape are from one another.

==Social and humanComputer science==

* [[Heterogeneous computing]], electronic systems that utilize a variety of different types of computational units

* [[Semantic heterogeneity]], where there are differences in meaning and interpretation across data sources and datasets

* A [[data resource]] with multiple types of formats.

===See also===

*[[Homogeneity and heterogeneity]]

*[[Homogeneity (disambiguation)]]

*[[Degeneracy_(biology)| Degeneracy]]

{{disamb}}

*[[amorphous]]

*[[heterozygous]]

*[[heteroazeotrope]]

*[[homogenization]]

*[[homozygous]]

*[[mesoporous silicates]]

NOW A DAYS EVERYTHING IS A STEREOTYPE

== Statistics ==

In [[meta analysis]] the term refers to the presence of multiple random intercepts in a dataset.In Meta-analysis of clinical studies which involves comparing and quantifying the effects of separate studies, heterogeneity refers to the differences in study populations or in methodologies use to study them that may have the effect of reaching differing conclusions. This is a problem as it calls into question conclusions that are drawn from studies and reduces their comparibility. The following concepts are important in understanding the importance of heterogeneity in meta-analytical research.

'''Clinical Heterogeneity:'''

Heterogeneity resulting from differences in clinical features of a population that is being studied or treated.

'''Methodological Heterogeneity:'''

Heterogeneity resulting from the differential use of study methodology. These may lead to different conclusions in different studies, despite their clinical characteristics being the same.

'''Statistical Heterogeneity:'''

Heterogeneity resulting from either clinical or statistical heterogeneity, which leads to a difference in expected results, more than which can be accounted for by chance.

==Systems==

In the world of enterprise computing, ''heterogeneous data'' is a mix of [[data]] from two or more sources, often of two or more formats, e.g., [[SQL]] and [[XML]].

Distributed systems are called ''heterogeneous'' if they contain many different types of hardware and software.

===See also===

[[Distributed computing]]

==Social and human science==

''Homogeneity'' and ''heterogeneity'' are terms used to describe various aspects of human groups, communities and populations, including cultural, demographic, ethnic and socio-political. In [[Economics]] and [[Social Sciences]], a set of [[wiktionary:agent|agents]] with different properties.

== General ==

In [[taxonomy]], a ''heterogeneous taxon'' is a taxon that contains a great variety of individuals or sub-taxa; usually this implies that the taxon is an artificial grouping.

== Genetics ==

In genetics heterogeneity refers to multiple origins of a disorder.

'''Allelic heterogeneity'''

If a number of different mutations at the same locus (same gene) produce same disorder such disorder is said to manifest'' allelic heterogeneity''

'''Example Disease:'''

Beta-Thalessemia can be caused by a number of different mutations in beta-globin gene.

'''Locus Heterogeneity'''

If mutations at a number of different loci result in a disorder such disorder is said to manifest ''locus heterogeneity''.

'''Example Disease'''

Retinitis Pigmentosa has autosomal dominant, autosomal recessive, and x-linked origins.

[[Category:Physical chemistry]]

[[Category:Disambiguation]]

[[ar:متغاير]]

[[de:Heterogenität (Pädagogik)]]

[[tr:Heterojen]]