Several semantic web-based applications (e.g., ecommerce, e-government and e-health applications) require temporal versioning of ontology instances, in order to represent, store and retrieve time-varying ontologies. However, commercial systems do not provide any support for creating and updating temporal ontologies. In this paper, we propose a prototype system, named Temporal OWL 2 Web Ontology...

ISF is a visual formalism for creating custom notations for high-level software design. In this paper we describe the formal semantics of ISF in Datalog. The semantics provides useful insight on how deduc-tive database technology can be used to generate tools to support our custom notations.

ARCHEOGUIDE (Augmented Reality-based Cultural Heritage On-site GUIDE) is an IST project, funded by the EU, aiming at providing a personalized Virtual Reality guide and tour assistant to archaeological site visitors and a multimedia repository and information system for archaeologists and site curators. The system provides monument reconstructions, ancient life simulation, and database tools for...

The Protein Data Bank (PDB; http://www.pdb.org/) continues to be actively involved in various aspects of the informatics of structural genomics projects--developing and maintaining the Target Registration Database (TargetDB), organizing data dictionaries that will define the specification for the exchange and deposition of data with the structural genomics centers and creating software tools to...

The MammoGrid project aims to deliver a prototype which enables the effective collaboration between radiologists using grid, service-orientation and database solutions. The grid technologies and service-based database management solution provide the platform for integrating diverse and distributed resources, creating what is called a 'virtual organisation'. The MammoGrid Virtual Organisation fa...

A typical Internet map-server application allows only retrieval of maps and maprelated data. We have been developing web-based GIS/database (WebGD) applications that allow users to insert, query, update, and delete geographical features and the data associated with them from standard Web browsers. The code shared by these applications is organized as the WebGD framework. We have also built a We...

This paper discusses the implementation of imrestaurant(), a MATLAB function for feature-based restaurant logo recognition. The algorithm works by first applying SIFT to a logo database and then creating a hierarchical vocabulary tree using K-means clustering. The input to the algorithm is a photograph of an image logo, which is first filtered to reduce noise. Then SIFT is applied to the input ...

Peer-to-Peer Database Management Systems (PDBMS) are still in the beginning of their evolution. They rise up p2p technology to exploit the power of available distributed database management technologies. The proposed PDBMS will be completely autonomous and any notions of centralization as central server or creating a cost-based global schema will be absent. In this paper a number of potential r...

We describe a relational database semantic re-engineering technology and the tools that are available for its implementation. The semantic re-engineering technological process starts with creatinga conceptual data ontology together with its annotations for database schema and user interface mappings. The database schema mappings are implemented in RDB2OWL and D2RQ server thus creating a SPARQL-...