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Former Staff

Dr Barry Lowden

Research Interests

Following a number of years work in the field of query language interfaces to relational and logic databases (including Natural Language Processing), my more recent research since 1995, has focussed on the area of semantic query optimisation and rule analysis.

Specific issues addressed include formal rule set generation, representation, analysis, selection and integrity consistency, together with the development of non-exponential query transformation algorithms. Experimental results show significant improvements in reducing query response opening the way to innovative commercial use.

The research can be used in the context of all classes of DB systems including relational and object-oriented and offers distinctive theoretical and experimental insights into the rich and productive area of improving information retrieval from large databases.

Selected Publications

B.G.T. Lowden and J. Robinson, 'Constructing inter-relational rules for semantic query optimisation' DEXA'2002, Toulouse, France, September 2002.

B.G.T. Lowden and J. Robinson, 'Improved information retrieval using semantic transformation', DEXA'2004, Zaragoza, Spain, September 2004.

J. Robinson and B.G.T. Lowden, ‘Distributing the Derivation and Maintenance of Subset Descriptor Rules’, Proc.7th International Conference on Information Systems and Synthesis, Orlando, USA, July 2001.

J. Robinson and B.G.T. Lowden, ‘Utilising multiple computers in database query processing and descriptor rule management’, Proc.DEXA’2001, Munich, Germany, September 2001.

B.G.T. Lowden and J. Robinson, ‘Rule management for semantic query optimisation in a distributed parallel environment’, Proc. 6th International Conference on Information Systems and Synthesis, pp 572-577, Orlando, USA, July 2000.

J. Robinson and B.G.T. Lowden, ‘Extending the use of query results at remote client sites’, pp536- 547, Proc. DEXA’2000, LNCS Springer Verlag, London, UK, September 2000.

B.G.T. Lowden and J. Robinson,’Extended query answering using integrity rules’, Proc. 12th International Symposium on Methodologies for Intelligent Systems, LNCS Springer Verlag, pp256-265, Charlotte, USA, October 2000.

B.G.T. Lowden and J. Robinson, ‘A statistical approach to rule selection in semantic query optimisation’. Proc. 11th International Symposium on Methodologies for Intelligent Systems, LNCS Springer Verlag, pp330-339, Warsaw, June 1999.

B.G.T. Lowden and J. Robinson, ‘A fast method for ensuring the consistency of integrity constraints’, Proc. DEXA’99, LNCS Springer Verlag, LNCS Springer Verlag, Florence, pp406- 415, August 1999.

J. Robinson and B.G.T. Lowden, ‘Semantic optimisation and rule graphs’, Proc. 5th KRDB Workshop, Seattle, WA, 31st May 1998.

J. Robinson and B.G.T. Lowden, ‘Attribute-pair range rules’, Proc. DEXA’98, LNCS Springer Verlag, pp680-691, Vienna, August 1998.

J. Robinson and B.G.T. Lowden, ‘Data analysis for query processing’, Proc. Second International Symposium on Intelligent Data Analysis, London, August, 1997.

A. Sayli and B.G.T. Lowden, ‘A fast transformation method for semantic query optimisation’ Proc. Int. Database Engineering and Applications Symposium, IEEE, Montreal, pp319-326, August 1997.

A. Sayli and B.G.T. Lowden, ‘Ensuring rule consistency in the presence of db updates’, Proc. XII International Symposium on Computer & Information Sciences, Turkey, October 1997.

A. Sayli and B.G.T. Lowden, ‘The use of statistics in semantic query optimisation’, Proc. 13th. Cybernetics and Systems Research (EMCSR’96), pp991-996, Vienna, April 1996.

B.G.T. Lowden and A. Kitsopanidis, ‘Enhancing database retrieval performance using record clustering’, Proc. 5th Hellenic Conference on Informatics, Athens, Greece, December 1995.

 

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