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Cluster headache, a neurological disease that involves an immense degree of pain; Cluster of differentiation, protocol used for the identification and investigation of cell surface molecules present on white blood cells; Winter cluster, in beekeeping, a well-defined cluster of honey bees in cold temperatures
A disease cluster is an unusually large aggregation of a relatively uncommon disease (medical condition) or event within a particular geographical location or period. [1] Recognition of a cluster depends on its size being greater than would be expected by chance . [ 1 ]
Computer cluster, the technique of linking many computers together to act like a single computer; Data cluster, an allocation of contiguous storage in databases and file systems; Cluster analysis, the statistical task of grouping a set of objects in such a way that objects in the same group are placed closer together (such as the k-means ...
The cluster /mx/ is also rare, but occurs in Russian words such as мха (/mxa/). Consonant clusters at the ends of syllables are less common but follow the same principles. Clusters are more likely to begin with a liquid, approximant, or nasal and end with a fricative, affricate, or stop, such as in English "world" /wə(ɹ)ld/.
Cluster analysis or clustering is the task of grouping a set of objects in such a way that objects in the same group (called a cluster) are more similar (in some specific sense defined by the analyst) to each other than to those in other groups
If the data have three clusters, the 2-dimensional plane spanned by three cluster centroids is the best 2-D projection. This plane is also defined by the first two PCA dimensions. Well-separated clusters are effectively modelled by ball-shaped clusters and thus discovered by k-means. Non-ball-shaped clusters are hard to separate when they are ...
A wide range of methods have been developed to assess the structure of human populations with the use of genetic data. Early studies of within and between-group genetic variation used physical phenotypes and blood groups, with modern genetic studies using genetic markers such as Alu sequences, short tandem repeat polymorphisms, and single nucleotide polymorphisms (SNPs), among others. [11]
In demographics, clustering is the gathering of various populations based on ethnicity, economics, or religion.. In countries that hold equality important, clustering occurs between groups because of polarizing factors such as religion, wealth or ethnocentrism.