Cluster
Encyclopedia
In science
- Cluster (physics)Cluster (physics)In physics, the term clusters denotes small, multiatom particles. As a rule of thumb, any particle of somewhere between 3 and 3x107 atoms is considered a cluster. Two-atom particles are sometimes considered clusters as well....
, a small group of atoms or molecules - Cluster chemistryCluster chemistryIn chemistry, a cluster is an ensemble of bound atoms intermediate in size between a molecule and a bulk solid. Clusters exist of diverse stoichiometries and nuclearities. For example, carbon and boron atoms form fullerene and borane clusters, respectively. Transition metals and main group...
, an array of bound atoms intermediate in character between a molecule and a solid - Cluster samplingCluster samplingCluster Sampling is a sampling technique used when "natural" groupings are evident in a statistical population. It is often used in marketing research. In this technique, the total population is divided into these groups and a sample of the groups is selected. Then the required information is...
, a sampling technique used when "natural" groupings are evident in a statistical population - Cluster analysis, a technique for statistical data analysis
- Consonant clusterConsonant clusterIn linguistics, a consonant cluster is a group of consonants which have no intervening vowel. In English, for example, the groups and are consonant clusters in the word splits....
, in linguistics
In astrophysics
- Star clusterStar clusterStar clusters or star clouds are groups of stars. Two types of star clusters can be distinguished: globular clusters are tight groups of hundreds of thousands of very old stars which are gravitationally bound, while open clusters, more loosely clustered groups of stars, generally contain less than...
, groups of stars which are gravitationally bound - Galaxy groups and clustersGalaxy groups and clustersGalaxy groups and clusters are the largest known gravitationally bound objects to have arisen thus far in the process of cosmic structure formation. They form the densest part of the large scale structure of the universe...
, large gravitationally-bound objects - Globular clusterGlobular clusterA globular cluster is a spherical collection of stars that orbits a galactic core as a satellite. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes and relatively high stellar densities toward their centers. The name of this category of star cluster is...
, a spherical collection of stars that orbits a galactic core as a satellite - Cluster missionCluster missionCluster II is a space mission of the European Space Agency, with NASA participation, to study the Earth's magnetosphere over the course of an entire solar cycle. The mission is composed of four identical spacecraft flying in a tetrahedral formation...
, a European Space Agency mission to study the magnetosphere
In biology and health sciences
- Cancer clusterCancer clusterCancer cluster is a term used by epidemiologists, statisticians, and public health workers to define an occurrence of a greater-than-expected number of cancer cases within a group of people in a geographic area over a period of time....
, in biomedicine, an occurrence of a greater-than-expected number of cancer cases - Cluster headacheCluster headacheCluster headache, nicknamed "suicide headache", is a neurological disease that involves, as its most prominent feature, an immense degree of pain in the head. Cluster headaches occur periodically: spontaneous remissions interrupt active periods of pain. The cause of the disease is currently unknown...
, a neurological disease that involves an immense degree of pain - Cluster of differentiationCluster of differentiationThe cluster of differentiation is a protocol used for the identification and investigation of cell surface molecules present on white blood cells, providing targets for immunophenotyping of cells...
, protocol used for the identification and investigation of cell surface molecules present on white blood cells. - Winter clusterWinter clusterIn beekeeping, a winter cluster is a well-defined cluster of honey bees that forms inside a beehive when the air temperature dips below 54 to 57 °F . Honey bees are but a few insects that survive the winter as a hive. As the outside air temperature decreases the winter cluster becomes tighter and...
, in beekeeping, a well-defined cluster of honey bees in cold temperatures - Cluster (epidemiology)Cluster (epidemiology)A cluster refers to a grouping of health-related events that are related temporally and in proximity. Typically, when clusters are recognized, they are reported to public health departments in the local area. The 1854 cholera outbreak which occurred in London is a classical example of a cluster...
, a grouping of cases of disease - Genetic cluster, a group of genes (or proteins, or metabolites) whose expression or concentration is similar across a range of conditions
In computing
- Cluster (computing)Cluster (computing)A computer cluster is a group of linked computers, working together closely thus in many respects forming a single computer. The components of a cluster are commonly, but not always, connected to each other through fast local area networks...
, a group of loosely coupled computers that work together closely - Data cluster, a group of disk sectors used in a File Allocation Table
In music
- Tone clusterTone clusterA tone cluster is a musical chord comprising at least three consecutive tones in a scale. Prototypical tone clusters are based on the chromatic scale, and are separated by semitones. For instance, three adjacent piano keys struck simultaneously produce a tone cluster...
, a musical chord comprising at least three consecutive tones in a scale - Cluster (band)Cluster (band)Cluster is a German experimental musical group who influenced the development of contemporary popular electronic and ambient music. They have recorded albums in a wide variety of styles ranging from experimental music to progressive rock, all of which had an avant-garde edge. Cluster has been...
, a German rock band
- Cluster (album)Cluster (album)Cluster is the eponymous first full-length album by German electronic music outfit Cluster. It is also the only album on which Conrad Plank is credited as a member. Cluster was recorded at Star-Studio in Hamburg, Germany in January, 1971...
, the 1971 eponymous album by the band Cluster - "Cluster", a track from the album Ben Bu Sarkiyi Sana YazdimBen Bu Şarkıyı Sana YazdımBen Bu Şarkıyı Sana Yazdım is the first album by Cem Adrian. It was released on February 14, 2005 by Imaj Music.-Track listing:# "Ben Bu Şarkıyı Sana Yazdım" - 5:07# "Aspiration" - 3:11# "Bana Özel" - 5:29...
by Cem Adrian - Cluster OneCluster One"Cluster One", an instrumental, is the first track on Pink Floyd's 1994 album, The Division Bell. It is also the first Pink Floyd song credited to Wright/Gilmour since "Mudmen", from the 1972 album Obscured by Clouds....
, the first track on Pink Floyd's 1994 album The Division Bell
In engineering
- A bicycle cogset, either a freewheel, or cassette
- The instrument cluster of an automobile
Other
- Cluster bombCluster bombA cluster munition is a form of air-dropped or ground-launched explosive weapon that releases or ejects smaller sub-munitions. Commonly, this is a cluster bomb that ejects explosive bomblets that are designed to kill enemy personnel and destroy vehicles...
, air-dropped or ground launched shells - Cluster diagramCluster diagramA Cluster diagram or clustering diagram is a general type of diagram, which represents some kind of cluster. A cluster in general is a group or bunch of several discrete items that are close to each other....
, general type of diagram, which represents some kind of cluster - Clusters School of Digital ArtsClusters School of Digital ArtsClusters College For Media & Design / Clusters School of Digital Arts is one of the largest Film, Visual Effects, Television, Animation and Media Arts institute in India, providing world-class education in all technical aspects of Media and Entertainment Industry...
, an animation and visual effects training school - Business clusterBusiness clusterA business cluster is a geographic concentration of interconnected businesses, suppliers, and associated institutions in a particular field. Clusters are considered to increase the productivity with which companies can compete, nationally and globally. In urban studies, the term agglomeration is used...
, a geographic cluster of competitive businesses - Cluster (novels)Cluster (novels)Cluster is a series of science fiction novels by Piers Anthony. Anthony originally conceived of and wrote the series as a trilogy but later added two additional volumes.-Setting:...
by Piers Anthony - Cluster home, a type of housing development
- CLUSTER Consortium Linking Universities of Science and Technology for Education and Research
- Honey Nut ClustersHoney Nut ClustersHoney Nut Clusters aka CLUSTERS is a breakfast cereal manufactured by General Mills, which refers to the cereal as "crispy wheat & rice flakes with delicious honey nut flavored clusters." The manufacturer also points out on the package that it is a "low fat part of your heart healthy diet". A...
, a breakfast cereal