Walied Othman "If we knew what it was we were doing, it would not be called research, would it?" (Albert Einstein) PhD CAIS Nanyang Technological University, Singapore

Office: N4-B3c-14 Tel: N/A E-mail: walied.othman ad ntu.edu.sg

• Area of research: database theory | logic | constraint databases | spatio-temporal databases | GIS
• Publications on DBLP, citations on Google Scholar.
• My resume.
• Papers: (Not all links are not operational, email me for a copy)
  • Trajectory Databases: Data Models, Uncertainty and Complete Query Languages. (JCSS 2010, Vol. 76, Issue 7, pp 538-560)
  • Modeling uncertainty of moving objects on road networks via space-time prisms (IJGIS 2009, Vol. 23, Issue 9, pp 1095-1117)
  • An analytic solution to the alibi query in the space-time prism model for moving object data (IJGIS, Vol. 25, Issue 2, pp 293-322)
  • Anchor uncertainty and space-time prisms on road networks (IJGIS 2010, Vol. 24, Issue 8, pp 1223-1248)
  • Analytical methods for error propagation in planar space-time prisms (JGS 2011, Vol. 13, Issue 4, pp 327-354)
• PhD Thesis:
  • Uncertainty management in trajectory databases
• Software (Mathematica, download extra needed library here):
  • Computing the Alibi Query
  • Visualizing space-time prisms on Road Networks
  • Visualizing space-time prisms and their intersections on Road Networks
  • Visualizing space-time prisms with uncertain anchors and their fractions on Road Networks
  • Visualizing errors in prism-prism intersections
  • Visualizing kinetic space-time prisms

• CAIS @ NTU
• Spatial Databases @ Hasselt University

• leisure coding
• rockclimbing

• IFGI - Institute for Geoinformatics @ University of Muenster
• Database Systems @ University of California, Santa Cruz