He went on to establish a new video duplication operation, advertised in TV Guide and created the direct-mail Video Club of America.
While such local rearrangements undoubtedly occur in genome evolution, the duplication distance model focuses on identifying the duplicate operations that account for the construction of repeated patterns within duplication blocks by aggregating substrings of other duplication blocks over large genomic distances.
The maximum parsimony DAG represents a scenario in which all 391 duplication blocks could have been constructed in a sequence of 17 431 total duplicate operations.
Definition 7. The duplication-deletion distance from a source string x to a target string y is the cost of a minimum sequence of duplicate operations from x and deletion operations, in any order, that generates y.
Lemma 3. Given a source string x, a target string y, If the cost of duplication is 1 per duplicate operation, and the cost of deletion is 1 per delete operation, then (x, y ) = d x, y ).
"It has its advantages and disadvantages," Mr. Dermody said of the consolidation, calling it largely unnecessary but adding that it could eliminate some duplications in operations, such as the need for two human resources and accounting departments.
The duplication-inversion-deletion distance from a source string x to a target string y is the cost of a minimum sequence of duplicate and duplicate-invert operations from x and deletion operations, in any order, that generates y.
The second focus is to analyze regions with duplications under 'local' operations like tandem duplications (Chaudhuri et al., 2006; Lajoie et al., 2007, for example).
Still, a combination of Rio Tinto and Billiton would face even more duplication, with overlapping operations in aluminum and copper, although eliminating redundancies in those areas would increase cost savings, allowing Rio Tinto to outbid rivals, analysts said.
