The dystonias are movement disorders in which sustained muscle contractions cause twisting and repetitive movements or abnormal postures. The movements, which are involuntary and sometimes painful, may affect a single muscle; a group of muscles such as those in the arms, legs, or neck; or the entire body.
Definition of Data Clustering. Data Clustering is the classification of a data set into a group of numbers, where members of each group surround a particular number.efinition of Data Clustering. Data Clustering is the classification of a data set into a group of numbers, where members of each group surround a particular number.
July 14, 2006 by. A cluster is a collection of commodity components to provide scalability and availability at a low cost. With this in mind, it is possible to create a database cluster for high-end enterprise applications by storing and processing information on commodity nodes. The architecture for a clustered database is distinguished by how data responsibilities are shared among compute nodes.