XML is gradually employed as a standard of data exchange in web environment since its inception in the 90s until present. It serves as a data exchange between systems and other applications. Meanwhile the data volume has grown substantially in the web and thus effective methods of storing and retrieving these data is essential. One recommended way is physically or virtually fragments the large ...

Vicariance hypotheses of Gondwanan fragmentation have been the prevailing explanation for the distributions of plant and animal taxa in the Southern Hemisphere since the widespread acceptance of plate tectonics in the late, 1960s (Bauer, 1993; Sanmartı́n & Ronquist, 2004). Recently, several molecular studies comparing the timing of cladogenic and vicariant Conservation Biology Graduate Program, ...

The purpose of this work is to describe a duality between a fragmentation associated to certain Dirichlet distributions and a natural random coagulation. The dual fragmentation and coalescent chains arising in this setting appear in the description of the genealogy of Yule processes.