Improving the efficiency of public transport systems is a critical problem. In order to help implement strategies for improving efficiency, public transport managers and researchers need access to an upto-date information system that fully describes these strategies including data on their quantitative benefits. This research outlines a proposal for developing such a database and how it might b...

In some research analysis organizations, effort is duplicated when disseminating raw information to multiple research groups. Although the various groups work on different problems, many times, the initial raw information used is the same. A solution to this problem is creating a centralized process for storing and disseminating common information using database technologies. In this paper, the...

The Third Manifesto (TTM) presents the principles of a relational database language that is free of deficiencies and ambiguities of SQL. There are database management systems that are created according to TTM. Developers need tools that support the development of databases by using these database management systems. UML is a widely used visual modeling language. It provides built-in extension m...

Database federation enables biological researchers to utilize resources more effectively, creating an environment in which the researcher can query multiple data sources without spending time learning new query mechanisms or issuing redundant queries which need to be integrated. Several mechanisms exist to federate databases. The ENQUire system is a network database federation system which uses...

An open-source database containing metrology data for X-ray mirrors is presented. It makes available metrology data (mirror heights and slopes profiles) that can be used with simulation tools for calculating the effects of optical surface errors in the performances of an optical instrument, such as a synchrotron beamline. A typical case is the degradation of the intensity profile at the focal p...

Software maintainability is a very important quality attribute. Its prediction for relational database-driven software applications can help organizations improve the maintainability of these applications. The research presented herein adopts a survey-based approach where a survey was conducted with 40 software professionals aimed at identifying and ranking the important maintainability predict...

ODE is a database system and environment based on the object paradigm. It offers one integrated data model for both database and general purpose manipulation. The database is defined, queried, and manipulated in the database programming language O++, an extension of C++. O++ uses the C++ object definition facility, called the class, to provide data encapsulation and multiple inheritance. O++ ex...

This paper presents the design of an autonomic, resource-aware distributed database which enables data to be backed up and shared without complex manual administration. The database, H2O, is designed to make use of unused resources on workstation machines. Creating and maintaining highly-available, replicated database systems can be difficult for untrained users, and costly for IT departments. ...

In an earlier study a Semantic Content Based Image Retrieval system was developed. The system requires a Visual Object Process Diagram VOPD to be created for each image in the database and for the query. This is a major drawback since it requires the user and database manager to be acquainted with the rules and structures of the VOPD. This is not trivial and in fact troublesome to the naive use...

In this paper we investigate the capabilities and shortcomings of UML 2 in the field of executable modelling, with special focus on database applications. As envisioned in the MDA initiative, this sets the challenges like achieving platform-independence of the base model, complete specification of behaviour in an adequate way and making the model an unambiguous and suitable input for model comp...