Support for Concept Hierarchies in DHTs

Abstract

Abstract

Tagging with DHARMA, a DHT-based approach for resource mapping through approximation

“…In [2] an efficient indexing scheme for storing and retrieving concept hierarchies over a fully decentralized system is given, even if folksonomies are not taken into account.…”

“…Some of the most relevant things to know are nodal degree distributions: in particular we extracted the distribution of the cardinalities of T ags(r), Res(t) and N F G (t) sets. Statistics of degrees (mean, standard deviation and max values, 1 http://likir.di.unito.it 2 The dataset has been collected in collaboration with the School of Informatics and Computing, Indiana University at Bloomington, IN, USA. 5.…”

Parallel Olap on Multi/Many-Core and Cloud Platforms

“…HIS was designed for peer-to-peer systems. Asiki et al in [17] presented a similar method that uses concept hierarchies; however, similar to [43], it does not contain a centralized tree structure. In another study by Asiki et al in [18,19], authors improved their previous work and implemented a decentralized concept hierarchy on a grid system.…”

“…In another study by Doka et al [45], an online system was presented that is capable of performing online OLAP operations. Their method is based on concept hierarchies similar to [17,18,19]; however, the method lacks a multi-dimensional data indexing structure such as R-tree. The method tries to integrate the concept hierarchies of different dimensions and use them to store input data.…”