DO is a deductive object oriented database developed at the National University of Singapore The system aims to integrate de ductive and object oriented paradigms and use their advantages to over come both the paradigms respective weaknesses DO di ers from con ventional deductive object oriented databases in its key based approach for OIDs pro active approach to resolving inheritance con icts a...

As information systems become more complex and widespread, their quality becomes a more and more important concern in their development. Therefore, requirements for software product quality should be treated in the same way as functional requirements, however it involves additional effort and extra costs. To ensure product quality two basic approaches can be considered: the first based on the e...

Big Data comes with huge challenges. Its volume and velocity makes handling, curating, and analytical processing a costly affair. Even to simply “look at” the data within an a priori defined budget and with a guaranteed interactive response time might be impossible to achieve. Commonly applied scale-out approaches will hit the technology and monetary wall soon, if not done so already. Likewise,...

In this paper we present an authorization mechanism for a relational database. It allows defining the user privileges exact to a table row. To implement that we used the INSTEAD triggers installed on views. This authorization system is an interesting application of such triggers. The user privileges are organized into parameterized roles that can be instantiated and/or inherited by other roles.

Motivated by the need to extract knowledge and value from interconnected data, graph analytics on big data is a very active area of research in both industry and academia. To support graph analytics efficiently a large number of in memory graph libraries, graph processing systems and graph databases have emerged. Projects in each of these categories focus on particular aspects such as static ve...

An ontology database system is a basic relational database management system that models an ontology plus its instances. To reason over the transitive closure of instances in the subsumption hierarchy, an ontology database can either unfold views at query time or propagate assertions using triggers at load time. In this paper, we present a method to embed ontology knowledge into a relational da...

The COMET DBMS (component-based embedded real-time database management system) is an experimental database platform. COMET is intended for resourceconstrained embedded vehicle control-systems. The complexity of modern vehicle control systems is rapidly increasing [1], and so is also the amount of data that needs to be handled and maintained. Thus, a need has emerged for a structured way of hand...

A prototype video database management system, which we call BilVideo, is presented. BilVideo provides an integrated support for queries on spatio-temporal, semantic and low-level features (color, shape, and texture) on video data. BilVideo does not target a specific application, and thus, it can be used to support any application with video data. An example application, news archives search sys...

In this study, a system for monitoring the structural health of bridge deck and predicting various possible damages to this section was designed based on measuring the temperature and humidity with the use of wireless sensor networks, and then it was implemented and investigated. A scaled model of a conventional medium sized bridge (length of 50 meters, height of 10 meters, and with 2 piers) wa...

The most important features of the developed image database system include compressed domain indexing, searching by using scalable features, and progressive image transmission. User interaction is involved at both the search re nement stage and display of the query results. The indexing and searching algorithms are tightly coupled with the underlying image compression algorithm by means the ima...