Author Publications

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Number of items: 24.


Graaff, Victor de and Pfoser, Dieter and Keulen, Maurice van and By, Rolf A. de (2015) Spatiotemporal behavior profiling: a treasure hunt case study. In: Web and Wireless Geographical Information Systems, W2GIS 2015, 21-22 May 2015, Grenoble, France (pp. pp. 143-158).

Graaff, Victor de and Venis, Anne van de and Keulen, Maurice van and By, Rolf A. de (2015) Generic knowledge-based analysis of social media for recommendations. In: 2nd Workshop on New Trends in Content-Based Recommender Systems, CBRecSys 2015, 20 September 2015, Vienna, Austria.


Graaff, Victor de and By, Rolf A. de and Keulen, Maurice van and Flokstra, Jan (2013) Point of interest to region of interest conversion. In: 21st ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, SIGSPATIAL GIS 2013, 5-8 November 2013, Orlando, FL, USA.

Ivanova, I. and Morales, J.M. and By, R.A. de and Beshe, T.S. and Gebresilassie, M.A. (2013) Searching for spatial data resources by fitness for use. Journal of spatial science, 58 (1). 15 - 28. ISSN 1449-8596

Kagoyire, C. and By, R.A. de (2013) Resource - constrained agriculture in developing countries and were Geo-ICT can help. In: H. Onsrud & A. Rajabifard (Eds.), Spatial enablement in support of economic development and poverty reduction. GSDI Association Press, Needham, 191 - 206. ISBN 9780985244422

Keulen, Maurice van and Graaff, Victor de and Zhu, Zhemin and By, Rolf de and Wombacher, Andreas and Flokstra, Jan (2013) //Rondje Zilverling: COMMIT/TimeTrails. I/O Vivat, 28 (4). pp. 16-17. ISSN 1389-0468


Graaff, Victor de and Keulen, Maurice van and By, Rolf de (2012) Semantic enrichment of GPS trajectories. In: Dutch-Belgian Database Day, DBDBD 2012, 21 November 2012, Brussels, Belgium.

Graaff, Victor de and Keulen, Maurice van and By, Rolf A. de (2012) Towards Geosocial Recommender Systems. In: 4th International Workshop on Web Intelligence & Communities, WI&C 2012, 16 April 2012, Lyon, France.

Singh, G. and By, R.A. de and Ivanova, I. (2012) Concepts, Compass and Computation: Models for Directional Part-Whole Relationships. In: 12th International Conference on Computational Science and Its Applications – ICCSA 2012, Salvador de Bahia, Brazil, June 18-21, 2012, June 18-21, 2012 (pp. 286 - 301).


Meratnia, Nirvana and By, Rolf A. de (2003) Trajectory Representation in Location-Based Services: Problems and Solution. In: Fourth International Conference on Web Information Systems Engineering Workshops, WISEW, 13 December 2003 , Rome, Italy (pp. pp. 18-24).


Meratnia, N. and By, R.A. de (2002) Aggregation and comparison of trajectories. In: Proceedings of the 10th ACM international symposium on Advances in geographic information systems, 8-9 Nov 2002, McLean, Virginia, USA (pp. pp. 49-54).

Meratnia, N. and Kainz, W. and By, R.A. de (2002) Spatio-temporal Methods to Reduce Data Uncertainty in Restricted Movement on a Road Network. In: Proceedings of the 10th International Symposium on Spatial Data Handling, 9-12 Jul 2002, Ottawa, Canada (pp. pp. 391-402).


Faase, F.J. and Even, S.J. and By, R.A. de and Apers, P.M.G. (1998) Integrating organisational and transactional aspects of cooperative activities. In: Proceedings 6th Workshop on Database Programming Languages (DBPL 1997), 18-20 Aug 1997, Estes Park, Colorado, USA (pp. pp. 336-354).


Steenhagen, H.J. and By, R.A. de and Blanken, H.M. (1996) Translating OSQL-Queries into Efficient Set Expressions. In: Proceedings of the 5th International Conference on Extending Database Technology (EDBT), 25-29 Mar 1996, Avignon, France (pp. pp. 183-197).


By, Rolf A. de and Even, Susan J. and Verkoulen, Peter A.C. (1995) Functionally Specified Distributed Transactions in Co-operative Scenarios. In: Fifth International Workshop on Research Issues in Data Engineering, Distributed Object Management,RIDE-DOM, 6-7 March 1995, Taipei, Taiwan (pp. pp. 116-121).

Keulen, M. van and Skowronek, J. and Apers, P.M.G. and Balsters, H. and Blanken, H.M. and By, R.A. de and Flokstra, J. (1995) A Framework for Representation, Validation and Implementation of Database Application Semantics. [Report]


Grefen, Paul W.P.J. and By, Rolf A. de (1994) A multi-set extended relational algebra: a formal approach to a practical issue. In: 10th International Conference on Data Engineering, ICDE 1994, 14-18 Feb 1994, Houston, TX, USA (pp. pp. 80-88).

Grefen, Paul W.P.J. and By, Rolf A. de and Apers, Peter M.G. (1994) Integrity Control in Advanced Database Systems. IEEE Bulletin on Data Engineering, 17 (2). pp. 9-13. ISSN 0743-9717

Holsheimer, Marcel and By, Rolf A. de and Ait-Kaci, Hassan (1994) A Database Interface for Complex Objects. In: 11th International Conference on Logic Programming, ICLP 1994, 13-18 June 1994, Santa Margherita Ligure, Italy (pp. pp. 437-455).

Steenhagen, H.J. and Apers, P.M.G. and Blanken, H.M. and By, R.A. de (1994) From Nested-Loop to Join Queries in OODB. In: Proceedings of 20th International Conference on Very Large Data Bases (VLDB 1994), 12-15 Sep 1994, Santiago de Chile, Chile (pp. pp. 618-629).


Apers, P.M.G. and Balsters, H. and Blanken, H.M. and By, R.A. de and Houtsma, M.A.W. and Verkoulen, P.A.C. and Wilschut, A.N. (1993) Database research at the University of Twente. SIGMOD record, 22 (4). pp. 87-91. ISSN 0163-5808

Balsters, H. and By, R.A. de and Zicari, R. (1993) Typed Sets as a Basis for Object-Oriented Database Schemas. In: Proceedings of the 7th European Conference on Object-Oriented Programming (ECOOP 1993), 26-30 July 1993, Kaiserslautern, Germany (pp. pp. 161-184).

Holsheimer, Marcel and By, Rolf A. de and Ait-Kaci, Hassan (1993) A Database Interface for Complex Objects. [Report]


By, Rolf de and Wieringa, Roel (1991) Dynamic specification of temporal semantics of conceptual models : guest editorial. Data & Knowledge Engineering, 6 (6). p. 449. ISSN 0169-023X

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