Semantic interoperability is essential when carrying out postgenomic clinical trials where several institutions collaborate, since researchers and developers need to have an integrated view and access to heterogeneous data sources. In this paper we present a solution that uses an ontology based on the HL7 v3 Reference Information Model and a set of R2RML mappings that relate this ontology to an...

The ontologization of non-ontological resources has led to the design of several specific methods, techniques and tools. Among those techniques, we have the Re-engineering Patterns. More specifically, we have the Patterns for re-engineering NORs (PR-NOR) that define a procedure that transforms the NOR terms into ontology representational primitives. Currently, the W3C RDB2RDF Working Group is a...

Redis is a widely used non-relational and in-memory database system. It holds a large amount of information both in memory and file system, which is of great significance to forensic analysis. This paper mainly proposes a forensic analysis method for Redis based on RDB and AOF file. A method of extracting useful information from RDB backup file is proposed based on the data storage mechanism de...

Nowadays, swirling around most businesses is not structure information but semi-structure information, such as spreadsheets, and documents created by an individual or company. However, in spite of success of data management of structure data by using databases, current enterprise information infrastructure is poorly suited for dealing with the continuing, rapid explosion of semi-structure data ...

We carry out extensive computer simulations to study the Lyapunov instability of a two-dimensional hard-disk system in a rectangular box with periodic boundary conditions. The system is large enough to allow the formation of Lyapunov modes parallel to the x-axis of the box. The Oseledec splitting into covariant subspaces of the tangent space is considered by computing the full set of covariant ...

A prerequisite for joining the rapidly growing Semantic Web is to expose data as RDF triples. In the cultural heritage world the data in question is very often a mixture of structured database fields and associated textual documents. Transforming relational database (RDB) content to RDF is not altogether straightforward and the issues are examined as a preliminary to the much more difficult ste...

The Linked Data (LD) initiative fostered the publication of a large number of relational databases in the Linked Open Data (LOD) cloud. A general and flexible way of publishing relational data in RDF format is to create an RDF view of the underlying relational data (RDB-RDF view). An RDB-RDF view can be materialized to improve query performance and data availability. However, an RDB-RDF view mu...