Thomas Ertl

Personal Homepage
http://www.vis.uni-stuttgart.de/institut/mitarbeiterinnen/thomas-ertl.html
Employer
()
Email
Thomas.Ertl@vis.uni-stuttgart.de

Publication Statistics

Publication period start
1989
Publication period end
2012
Number of co-authors
110

Co-authors
Number of publications with favourite co-authors

Productive Colleagues
Most productive colleagues in number of publications

Publications

Raschke, Michael, Chen, Xuemei, Ertl, Thomas (2012): Parallel scan-path visualization. In: Proceedings of the 2012 Symposium on Eye Tracking Research & Applications , 2012, . pp. 165-168. http://dx.doi.org/10.1145/2168556.2168583

Taras, Christiane, Siemoneit, Oliver, Weißer, N., Rotard, Martin, Ertl, Thomas (2008): Improving the Accessibility of Wikis. In: Miesenberger, Klaus, Klaus, Joachim, Zagler, Wolfgang L., Karshmer, Arthur I. (eds.) ICCHP 2008 - Computers Helping People with Special Needs - 11th International Conference July 9-11, 2008, Linz, Austria. pp. 430-437. http://dx.doi.org/10.1007/978-3-540-70540-6_62

Giereth, Mark, Ertl, Thomas (2008): Design Patterns for Rapid Visualization Prototyping. In: IV 2008 - 12th International Conference on Information Visualisation 8-11 July, 2008, London, UK. pp. 569-574. http://dx.doi.org/10.1109/IV.2008.36

Giereth, Mark, Ertl, Thomas (2008): Visualization Enhanced Semantic Wikis for Patent Information. In: IV 2008 - 12th International Conference on Information Visualisation 8-11 July, 2008, London, UK. pp. 185-190. http://dx.doi.org/10.1109/IV.2008.50

Bidmon, Katrin, Grottel, Sebastian, Bos, Fabian, Pleiss, Jürgen, Ertl, Thomas (2008): Visual Abstractions of Solvent Pathlines near Protein Cavities. In Comput. Graph. Forum, 27 (3) pp. 935-942. http://dx.doi.org/10.1111/j.1467-8659.2008.01227.x

Schafhitzel, Tobias, Vollrath, J. E., Gois, Joao Paulo, Weiskopf, Daniel, Castelo, Antonio, Ertl, Thomas (2008): Topology-Preserving lambda2-based Vortex Core Line Detection for Flow Visualization. In Comput. Graph. Forum, 27 (3) pp. 1023-1030. http://dx.doi.org/10.1111/j.1467-8659.2008.01238.x

Gois, Joao Paulo, Polizelli-Junior, Valdecir, Etiene, Tiago, Tejada, Eduardo, Castelo, Antonio, Nonato, Luis Gustavo, Ertl, Thomas (2008): Twofold adaptive partition of unity implicits. In The Visual Computer, 24 (12) pp. 1013-1023. http://dx.doi.org/10.1007/s00371-008-0297-x

Ertl, Thomas (2008): Interaktive Visualisierung - Wege aus der Datenflut. In: Herczeg, Michael, Kindsmüller, Martin Christof (eds.) Mensch and Computer 2008 7-10 September, 2008, Lübeck, Germany. pp. 3. http://

Eissele, Mike, Kreiser, Matthias, Ertl, Thomas (2008): Context-Controlled Flow Visualization in Augmented Reality. In: Proceedings of the 2008 Conference on Graphics Interface May 28-30, 2008, Windsor, Ontario, Canada. pp. 89-96.

Roßler, Friedemann, Botchen, Ralf P., Ertl, Thomas (2008): Dynamic Shader Generation for GPU-Based Multi-Volume Ray Casting. In IEEE Computer Graphics and Applications, 28 (5) pp. 66-77. http://dx.doi.org/10.1109/MCG.2008.96

Schafhitzel, Tobias, Tejada, Eduardo, Weiskopf, Daniel, Ertl, Thomas (2007): Point-based stream surfaces and path surfaces. In: Proceedings of the 2007 Conference on Graphics Interface , 2007, . pp. 289-296. http://doi.acm.org/10.1145/1268517.1268564

Rotard, Martin, Giereth, Mark, Ertl, Thomas (2007): Semantic lenses: Seamless augmentation of web pages with context information from implicit. In Computers & Graphics, 31 (3) pp. 361-369. http://dx.doi.org/10.1016/j.cag.2007.01.027

Bidmon, Katrin, Reina, Guido, Bos, Fabian, Pleiss, Jürgen, Ertl, Thomas (2007): Time-Based Haptic Analysis of Protein Dynamics. In: WHC 2007 - Second Joint EuroHaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems 22-24 March, 2007, Tsukuba, Japan. pp. 537-542. http://doi.ieeecomputersociety.org/10.1109/WHC.2007.115

Tejada, Eduardo, Gois, Joao Paulo, Nonato, Luis Gustavo, Castelo, Antonio, Ertl, Thomas (2006): Hardware-accelerated Extraction and Rendering of Point Set Surfaces. In: Santos, Beatriz Sousa, Ertl, Thomas, Joy, Kenneth I. (eds.) EuroVis06 Joint Eurographics - IEEE VGTC Symposium on Visualization 8-10 May, 2006, Lisbon, Portugal. pp. 21-28. http://dx.doi.org/10.2312/VisSym/EuroVis06/021-028

Hub, Andreas, Hartter, Tim, Ertl, Thomas (2006): Interactive tracking of movable objects for the blind on the basis of environment models a. In: Eighth Annual ACM Conference on Assistive Technologies , 2006, . pp. 111-118. http://doi.acm.org/10.1145/1168987.1169007

Jang, Yun, Botchen, Ralf P., Lauser, Andreas, Ebert, David S., Gaither, Kelly P., Ertl, Thomas (2006): Enhancing the Interactive Visualization of Procedurally Encoded Multifield Data with Ellip. In Comput. Graph. Forum, 25 (3) pp. 587-596. http://www.eg.org/EG/CGF/volume25/issue3/v25i3pp587-596.pdf

Strengert, Magnus, Klein, Thomas, Botchen, Ralf P., Stegmaier, Simon, Chen, Min, Ertl, Thomas (2006): Spectral volume rendering using GPU-based raycasting. In The Visual Computer, 22 (8) pp. 550-561. http://dx.doi.org/10.1007/s00371-006-0028-0

Reina, Guido, Bidmon, Katrin, Enders, Frank, Hastreiter, Peter, Ertl, Thomas (2006): GPU-Based Hyperstreamlines for Diffusion Tensor Imaging. In: Santos, Beatriz Sousa, Ertl, Thomas, Joy, Kenneth I. (eds.) EuroVis06 Joint Eurographics - IEEE VGTC Symposium on Visualization 8-10 May, 2006, Lisbon, Portugal. pp. 35-42. http://dx.doi.org/10.2312/VisSym/EuroVis06/035-042

Weiler, Manfred, Botchen, Ralf P., Stegmaier, Simon, Ertl, Thomas, Huang, Jingshu, Jang, Yun, Ebert, David S., Gaither, Kelly P. (2005): Hardware-Assisted Feature Analysis and Visualization of Procedurally Encoded Multifield Vo. In IEEE Computer Graphics and Applications, 25 (5) pp. 72-81. http://doi.ieeecomputersociety.org/10.1109/MCG.2005.106

Reina, Guido, Ertl, Thomas (2005): Hardware-Accelerated Glyphs for Mono- and Dipoles in Molecular Dynamics Visualization. In: Brodlie, Ken, Duke, David J., Joy, Kenneth I. (eds.) EuroVis05 Joint Eurographics - IEEE VGTC Symposium on Visualization 1-3 June, 2005, Leeds, United Kingdom. pp. 177-182. http://dx.doi.org/10.2312/VisSym/EuroVis05/177-182

Weiskopf, Daniel, Schafhitzel, Tobias, Ertl, Thomas (2005): Real-Time Advection and Volumetric Illumination for the Visualization of 3D Unsteady Flow. In: Brodlie, Ken, Duke, David J., Joy, Kenneth I. (eds.) EuroVis05 Joint Eurographics - IEEE VGTC Symposium on Visualization 1-3 June, 2005, Leeds, United Kingdom. pp. 13-20. http://dx.doi.org/10.2312/VisSym/EuroVis05/013-020

Rotard, Martin, Weiskopf, Daniel, Ertl, Thomas (2005): A combined introductory course on human-computer interaction and computer graphics. In Computers & Graphics, 29 (2) pp. 267-272. http://dx.doi.org/10.1016/j.cag.2004.12.013

Stegmaier, Simon, Rist, Ulrich, Ertl, Thomas (2005): Opening the Can of Worms: An Exploration Tool for Vortical Flows. In: 16th IEEE Visualization Conference VIS 2005 23-28 October, 2005, Minneapolis, MN, USA. pp. 59. http://doi.ieeecomputersociety.org/10.1109/VIS.2005.74

Weiskopf, Daniel, Borchers, Marc, Ertl, Thomas, Falk, Martin, Fechtig, Oliver, Frank, Regine, Grave, Frank, King, Andreas, Kraus, Ute, Müller, Thomas, Nollert, Hans-Peter, Mendez, Isabel Rica, Ruder, Hanns, Zahn, Corvin, Zatloukal, Michael, Schafhitzel, Tobias, Schär, Sonja (2005): Visualization in the Einstein Year 2005: A Case Study on Explanatory and Illustrative Visu. In: 16th IEEE Visualization Conference VIS 2005 23-28 October, 2005, Minneapolis, MN, USA. pp. 74. http://doi.ieeecomputersociety.org/10.1109/VIS.2005.120

Weiskopf, Daniel, Schramm, Frederik, Erlebacher, Gordon, Ertl, Thomas (2005): Particle and Texture Based Spatiotemporal Visualization of Time-Dependent Vector Fields. In: 16th IEEE Visualization Conference VIS 2005 23-28 October, 2005, Minneapolis, MN, USA. pp. 81. http://doi.ieeecomputersociety.org/10.1109/VIS.2005.75

Klein, Thomas, Strengert, Magnus, Stegmaier, Simon, Ertl, Thomas (2005): Exploiting Frame-to-Frame Coherence for Accelerating High-Quality Volume Raycasting on Gra. In: 16th IEEE Visualization Conference VIS 2005 23-28 October, 2005, Minneapolis, MN, USA. pp. 29. http://doi.ieeecomputersociety.org/10.1109/VIS.2005.32

Rotard, Martin, Knodler, Sven, Ertl, Thomas (2005): A tactile web browser for the visually disabled. In: Proceedings of the Sixteenth ACM Conference on Hypertext , 2005, . pp. 15-22. http://doi.acm.org/10.1145/1083356.1083361

Hub, Andreas, Diepstraten, Joachim, Ertl, Thomas (2004): Design and development of an indoor navigation and object identification system for the bl. In: Sixth Annual ACM Conference on Assistive Technologies , 2004, . pp. 147-152. http://doi.acm.org/10.1145/1028630.1028657

Jang, Yun, Weiler, Manfred, Hopf, Matthias, Huang, Jingshu, Ebert, David S., Gaither, Kelly P., Ertl, Thomas (2004): Interactively Visualizing Procedurally Encoded Scalar Fields. In: Deussen, Oliver, Hansen, Charles D., Keim, Daniel A., Saupe, Dietmar (eds.) VisSym 2004 - Symposium on Visualization May 19-21, 2004, Konstanz, Germany. pp. 35-44,339.

Rose, Dirc, Bidmon, Katrin, Ertl, Thomas (2004): Intuitive and Interactive Modification of Large Finite Element Models. In: VIS 2004 - 15th IEEE Visualization 2004 Conference 10-15 October, 2004, Austin, TX, USA. pp. 361-368. http://csdl.computer.org/comp/proceedings/vis/2004/8788/00/87880361abs.htm

Westenberg, Michel A., Ertl, Thomas (2004): Vector Wavelet Thresholding for Vector Field Denoising. In: VIS 2004 - 15th IEEE Visualization 2004 Conference 10-15 October, 2004, Austin, TX, USA. pp. 25. http://csdl.computer.org/comp/proceedings/vis/2004/8788/00/87880025pabs.htm

Reina, Guido, Ertl, Thomas (2004): Volume Visualization and Visual Queries for Large High-Dimensional Datasets. In: Deussen, Oliver, Hansen, Charles D., Keim, Daniel A., Saupe, Dietmar (eds.) VisSym 2004 - Symposium on Visualization May 19-21, 2004, Konstanz, Germany. pp. 255-260.

Weiskopf, Daniel, Schafhitzel, Tobias, Ertl, Thomas (2004): GPU-Based Nonlinear Ray Tracing. In Comput. Graph. Forum, 23 (3) pp. 625-634. http://diglib.eg.org/EG/CGF/volume23/issue3/v23i3pp625-634_abstract.html

Rotard, Martin, Otte, Kerstin, Ertl, Thomas (2004): Exploring Scalable Vector Graphics for Visually Impaired Users. In: Klaus, Joachim, Miesenberger, Klaus, Zagler, Wolfgang L., Burger, Dominique (eds.) ICCHP 2004 - Computers Helping People with Special Needs - 9th International Conference July 7-9, 2004, Paris, France. pp. 725-730. http://link.springer.de/link/service/series/0558/bibs/3118/31180725.htm

Hopf, Matthias, Luttenberger, Michael, Ertl, Thomas (2004): Hierarchical Splatting of Scattered 4D Data. In IEEE Computer Graphics and Applications, 24 (4) pp. 64-72. http://csdl.computer.org/comp/mags/cg/2004/04/g4064abs.htm

Stegmaier, Simon, Ertl, Thomas (2004): A Graphics Hardware-Based Vortex Detection and Visualization System. In: VIS 2004 - 15th IEEE Visualization 2004 Conference 10-15 October, 2004, Austin, TX, USA. pp. 195-202. http://csdl.computer.org/comp/proceedings/vis/2004/8788/00/87880195abs.htm

Weiler, Manfred, Klein, Thomas, Ertl, Thomas (2004): Direct volume rendering in OpenSG. In Computers & Graphics, 28 (1) pp. 93-98. http://dx.doi.org/10.1016/j.cag.2003.10.009

Weiskopf, Daniel, Ertl, Thomas (2004): A hybrid physical/device-space approach for spatio-temporally coherent interactive texture. In: Graphics Interface 2004 May 17-19, 2004, London, Ontario, Canada. pp. 263-270. http://portal.acm.org/citation.cfm?id=1006058.1006090

Rose, Dirc, Stegmaier, Simon, Reina, Guido, Weiskopf, Daniel, Ertl, Thomas (2003): Non-invasive Adaptation of Black-box User Interfaces. In: Biddle, Robert, Thomas, Bruce H. (eds.) AUIC2003 - User Interfaces 2003 - Fourth Australasian User Interface Conference February, 2003, Adelaide, South Australia. pp. 19-24. http://crpit.com/confpapers/CRPITV18Rose.pdf

Diepstraten, Joachim, Weiskopf, Daniel, Ertl, Thomas (2003): Interactive Cutaway Illustrations. In Comput. Graph. Forum, 22 (3) pp. 523-532. http://diglib.eg.org/EG/CGF/volume22/issue3/cgf_700.html

Rotard, M., Bosse, K., Schweikhardt, W., Ertl, Thomas (2003): Access to Mathematical Expressions in MathML for the Blind. In: Stephanidis, Constantine (eds.) Proceedings of the Tenth International Conference on Human-Computer Interaction June 22-27, 2003, Crete, Greece. pp. 1325-1329.

Hopf, Matthias, Ertl, Thomas (2003): Hierarchical Splatting of Scattered Data. In: Turk, Greg, Wijk, Jarke J. van, II, Robert J. Moorhead (eds.) 14th IEEE Visualization 2003 Conference VIS 2003 19-24 October, 2003, Seattle, WA, USA. pp. 433-440.

Rottger, Stefan, Guthe, Stefan, Weiskopf, Daniel, Ertl, Thomas, Straßer, Wolfgang (2003): Smart Hardware-Accelerated Volume Rendering. In: VisSym 2003 - Symposium on Visualization May 26-28, 2003, Grenoble, France.

Weiler, Manfred, Kraus, Martin, Merz, Markus, Ertl, Thomas (2003): Hardware-Based Ray Casting for Tetrahedral Meshes. In: Turk, Greg, Wijk, Jarke J. van, II, Robert J. Moorhead (eds.) 14th IEEE Visualization 2003 Conference VIS 2003 19-24 October, 2003, Seattle, WA, USA. pp. 333-340.

Weiskopf, Daniel, Erlebacher, Gordon, Ertl, Thomas (2003): A Texture-Based Framework for Spacetime-Coherent Visualization of Time-Dependent Vector Fi. In: Turk, Greg, Wijk, Jarke J. van, II, Robert J. Moorhead (eds.) 14th IEEE Visualization 2003 Conference VIS 2003 19-24 October, 2003, Seattle, WA, USA. pp. 107-114.

Stegmaier, Simon, Rose, Dirc, Ertl, Thomas (2002): A Case Study On The Applications Of A Generic Library For Low-Cost Polychromatic Passive S. In: IEEE Visualization 2002 , 2002, .

Diepstraten, Joachim, Weiskopf, Daniel, Ertl, Thomas (2002): Transparency in Interactive Technical Illustrations. In Comput. Graph. Forum, 21 (3) pp. . http://www.eg.org/EG/CGF/volume21/issue3/abstracts/CGF591.HTML

Weiskopf, Daniel, Engel, Klaus, Ertl, Thomas (2002): Volume Clipping via Per-Fragment Operations in Texture-Based Volume Visualization. In: IEEE Visualization 2002 , 2002, .

Frisch, Norbert, Rose, Dirc, Sommer, Ove, Ertl, Thomas (2002): Visualization and pre-processing of independent finite-element meshes for car crash simula. In The Visual Computer, 18 (4) pp. 236-249. http://dx.doi.org/10.1007/s003710100144

Iserhardt-Bauer, Sabine, Hastreiter, Peter, Ertl, Thomas, Eberhardt, K., Tomandl, Bernd (2001): Case Study: Medical Web Service for the Automatic 3D Documentation for Neuroradiological D. In: Ertl, Thomas, Joy, Kenneth I., Varshney, Amitabh (eds.) IEEE Visualization 2001 October 24-26, 2001, San Diego, CA, USA.

Kraus, Martin, Ertl, Thomas (2001): Cell-Projection of Cyclic Meshes. In: Ertl, Thomas, Joy, Kenneth I., Varshney, Amitabh (eds.) IEEE Visualization 2001 October 24-26, 2001, San Diego, CA, USA.

Weiler, Manfred, Ertl, Thomas (2001): Hardware-Software-Balanced Resampling for the Interactive Visualization of Unstructured Gr. In: Ertl, Thomas, Joy, Kenneth I., Varshney, Amitabh (eds.) IEEE Visualization 2001 October 24-26, 2001, San Diego, CA, USA.

Rottger, Stefan, Kraus, Martin, Ertl, Thomas (2000): Hardware-accelerated volume and isosurface rendering based on cell-projection. In: IEEE Visualization 2000 , 2000, . pp. 109-116. http://doi.acm.org/10.1145/375213.375226

Westermann, Rüdiger, Johnson, Christopher, Ertl, Thomas (2000): A level-set method for flow visualization. In: IEEE Visualization 2000 , 2000, . pp. 147-154. http://doi.acm.org/10.1145/375213.375234

Hastreiter, Peter, Rezk-Salama, Christof, Nimsky, Christopher, Lürig, Christoph, Greiner, Günther, Ertl, Thomas (2000): Registration techniques for the analysis of the brain shift in neurosurgery. In Computers & Graphics, 24 (3) pp. 385-389. http://dx.doi.org/10.1016/S0097-8493(00)00034-0

Engel, Klaus, Ertl, Thomas, Hastreiter, Peter, Tomandl, Bernd, Eberhardt, K. (2000): Combining local and remote visualization techniques for interactive volume rendering in me. In: IEEE Visualization 2000 , 2000, . pp. 449-452. http://doi.acm.org/10.1145/375213.375294

Schulz, Martin, Reck, Frank, Bartelheimer, Wolf, Ertl, Thomas (1999): Interacitve Visualization of Fluid Dynamics Simulations in Locally Refined Cartesian Grids. In: IEEE Visualization 1999 , 1999, . pp. 413-416.

Sommer, Ove, Dietz, Alexander, Westermann, Rüdiger, Ertl, Thomas (1999): An interactive visualization and navigation tool for medical volume data. In Computers & Graphics, 23 (2) pp. 233-244. http://dx.doi.org/10.1016/S0097-8493(99)00033-3

Heidrich, Wolfgang, Westermann, Rüdiger, Seidel, Hans-Peter, Ertl, Thomas (1999): Applications of pixel textures in visualization and realistic image synthesis. In: SI3D 1999 , 1999, . pp. 127-134. http://doi.acm.org/10.1145/300523.300538

Westermann, Rüdiger, Kobbelt, Leif, Ertl, Thomas (1999): Real-time exploration of regular volume data by adaptive reconstruction of isosurfaces. In The Visual Computer, 15 (2) pp. 100-111. http://springerlink.metapress.com/openurl.asp?genre=article&issn=1432-2315&volume=15&issue=2&spage=100

Hopf, Matthias, Ertl, Thomas (1999): Accelerating 3D Convolution Using Graphics Hardware. In: IEEE Visualization 1999 , 1999, . pp. 471-474.

Engel, Klaus D., Westermann, Rüdiger, Ertl, Thomas (1999): Isosurface Extraction Techniques for Web-Based Volume Visualization. In: IEEE Visualization 1999 , 1999, . pp. 139-146.

Rezk-Salama, Christof, Hastreiter, Peter, Teitzel, Christian, Ertl, Thomas (1999): Interacitve Exploration of Volume Line Integral Convolution Based on 3D-Texture Mapping. In: IEEE Visualization 1999 , 1999, . pp. 233-240.

Cai, Wenli, Sakas, Georgios, Grosso, Roberto, Ertl, Thomas (1998): Progressive Iso-Surface Extraction from Hierarchical 3D Meshes. In Comput. Graph. Forum, 17 (3) pp. 125-136.

Lürig, Christoph, Ertl, Thomas (1998): Hierarchical volume analysis and visualization based on morphological operators. In: IEEE Visualization 1998 , 1998, . pp. 335-341. http://doi.acm.org/10.1145/288216.288304

Kuschfeldt, Sven, Holzner, Michael, Sommer, Ove, Ertl, Thomas (1998): Efficient Visualization of Crash-Worthiness Simulations. In IEEE Computer Graphics and Applications, 18 (4) pp. 60-65. http://doi.ieeecomputersociety.org/10.1109/38.689666

Schulz, Martin, Reuding, Thomas, Ertl, Thomas (1998): Analyzing Engineering Simulations in a Virtual Environment. In IEEE Computer Graphics and Applications, 18 (6) pp. 46-52. http://doi.ieeecomputersociety.org/10.1109/38.734979

Westermann, Rüdiger, Ertl, Thomas (1997): A Multiscale Approach to Integrated Volume Segmentation and Rendering. In Comput. Graph. Forum, 16 (3) pp. 117-128.

Westermann, Rüdiger, Ertl, Thomas (1997): The VSBUFFER: visibility ordering of unstructured volume primitives by polygon drawing. In: IEEE Visualization 1997 , 1997, . pp. 35-42. http://doi.acm.org/10.1145/266989.267012

Grosso, Roberto, Lürig, Christoph, Ertl, Thomas (1997): The multilevel finite element method for adaptive mesh optimization and visualization of v. In: IEEE Visualization 1997 , 1997, . pp. 387-394. http://doi.acm.org/10.1145/266989.267107

Kuschfeldt, Sven, Ertl, Thomas, Holzner, Michael (1997): Efficient visualization of physical and structural properties in crash-worthiness simulati. In: IEEE Visualization 1997 , 1997, . pp. 487-490. http://doi.acm.org/10.1145/266989.267128

Ertl, Thomas, Ruder, Hanns, Allrutz, R., Gruber, K., Günther, Michael, Hospach, F., Ruder, Michael, Subke, J., Widmayer, K. (1993): Interactive control of biomechanical animation. In The Visual Computer, 9 (8) pp. 459-465. http://

Ruder, Hanns, Ertl, Thomas, Geyer, F., Herold, H., Kraus, Ute (1989): Line-of-sight integration: A powerful tool for visualization of three-dimensional scalar f. In Computers & Graphics, 13 (2) pp. 223-228. http://dx.doi.org/10.1016/0097-8493(89)90064-2

Ertl, Thomas, Joy, Kenneth I., Varshney, Amitabh (eds.) IEEE Visualization 2001 October 24-26, 2001, San Diego, CA, USA.

Santos, Beatriz Sousa, Ertl, Thomas, Joy, Kenneth I. (eds.) EuroVis06 Joint Eurographics - IEEE VGTC Symposium on Visualization 8-10 May, 2006, Lisbon, Portugal.