About

I am a Ph.D. student at Delft University of Technology. I am in the Data Visualization group, which is a sub-group of the Computer Graphics and CAD/CAM group in the Mediamatics department in the Faculty of Electrical Engineering, Mathematics and Computer Science (EWI). My advisor is Professor Frits Post. Michal Koutek also supervises me. I also work closely with Gerwin de Haan. I collaborate with Thijs Heus and Professor Harm Jonker from TNW. I've also supervised Dylan Dussel.

I started my Ph.D. project in August of 2004. My research focuses on visualization of large, time-dependent data sets in virtual reality. Specifically, I am working with the results of Large Eddy Simulations (LES) of fairweather cumulus clouds. My project is a joint project with the Faculty of TNW (Applied Sciences), which is responsible for the simulations.

I am also interested in routing and control algorithms for digital microfluidic systems (DMFS). I collaborate with Professor Srinivas Akella from RPI on this subject.

Project

My project is entitled "Visualization of Cumulus Clouds in Virtual Reality". It is a joint project between the faculty of Electrical Engineering, Mathematics, and Computer Science (EWI) and the Faculty of Applied Sciences (TNW). The two Ph.D. students involved are myself and Thijs Heus, under the advisement of Frits Post and Harm Jonker, respectively. Michal Koutek also has a supervisory role in the project. Funding for the project has been provided by the Royal Dutch Meteorological Institute.

The project description is as follows:

Accurate numerical simulation of cumulus clouds is a highly challenging topic in atmospheric research. Large-Eddy Simulations (LES) can help to resolve important research questions on cloud dynamics, cloud mixing phenomena, and precipitation. In order to fully exploit the richness of the huge 3D time evolving data sets obtained from LES, advanced data exploration and visualization tools are crucial. Virtual reality (VR) environments offer excellent opportunities. Preliminary tests on a virtual workbench have shown the feasibility of visualizing an evolving 3D cumulus cloud field, allowing interactive examination and virtual experimentation.

In this multidisciplinary project we will further develop these ideas, and aim at development of a generic tool for interactive analysis of atmospheric simulation data. This includes the design of virtual environments for large time-varying data sets, for visualization of cloud morphology, atmospheric motion patterns, and a number of volumetric data quantities. A range of interactive techniques and scenarios will be developed to support this. Special attention will be given to facilities for comparative data visualization, the extraction of features and temporal events, and for testing specific hypotheses about the data.

Publications

2004

• A Design Tool For Specifying Implicit Algebraic Blend Surfaces
  

  E. J. Griffith. A design tool for specifying implicit algebraic blend surfaces. Master's thesis, Rensselaer Polytechnic Institute, July 2004.
  Web Page  •  BibTeX  •  Abstract  •  PDF

2005

• Coordinating Multiple Droplets in Planar Array Digital Microfluidic Systems
  

  E. J. Griffith and S. Akella. Coordinating multiple droplets in planar array digital microfluidics systems. In M. Erdmann, D. Hsu, M. Overmars, and F. van der Stappen, editors, Algorithmic Foundations of Robotics VI, pages 219-234, 2005.
  Web Page  •  BibTeX  •  Abstract  •  PDF
  E. J. Griffith and S. Akella. Coordinating multiple droplets in planar array digital microfluidic systems. International Journal of Robotics Research, 24(11):933-949, November 2005.
  Web Page  •  BibTeX  •  Abstract  •  PDF

• Feature Tracking in VR for Cumulus Cloud Life-Cycle Studies
  

  E. J. Griffith, F. H. Post, M. Koutek, T. Heus, and H. J. J. Jonker. Feature tracking in VR for cumulus cloud life-cycle studies. In E. Kjems and R. Blach, editors, Virtual Environments 2005, pages 121-128, 2005.
  Web Page  •  BibTeX  •  Abstract  •  PDF

2006

• Performance Characterization of a Reconfigurable Planar-Array Digital Microfluidic System
  

  Eric J. Griffith, Srinivas Akella, and Mark K. Goldberg. Performance characterization of a reconfigurable planar array digital microfluidic system. IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 25(2):340-352, February 2006.
  Web Page  •  BibTeX  •  Abstract  •  PDF

• Hybrid Interfaces in VEs: Intent and Interaction
  

  G. de Haan, E. J. Griffith, M. Koutek and F. H. Post. Hybrid Interaces in VEs: Intent and Interaction. In R. Hubbold and M. Lin, editors, Virtual Environments 2006, pages 109-118, 2006.
  Web Page  •  BibTeX  •  Abstract  •  PDF

• A Reprocessing Tool for Quantitative Data Analysis in a Virtual Environment
  

  E. J. Griffith, M. Koutek, F. H. Post, T. Heus, and H. J. J. Jonker. A Reprocessing Tool for Quantitative Data Analysis in a Virtual Environment. In M. Slater and Y. Kitamura, editors, Proc. ACM VRST 2006, pages 212-215, 2006.
  Web Page  •  BibTeX  •  Abstract  •  PDF

• Lifecycle analysis of Cumulus Clouds using a 3D Virtual Reality Environment
  

  T. Heus, and H. J. J. Jonker, E. J. Griffith, and F. H. Post. Lifecycle analysis of Cumulus Clouds using a 3D Virtual Reality Environment. In The 17th symposium on Boundary-Layers and Turbulence, 22-25 May 2006. Extended Abstract.
  Web Page  •  BibTeX  •  Abstract  •  PDF

2007

• Fast Normal Vector Compression with Bounded Error
  

  Eric J. Griffith, Michal Koutek and Frits H. Post. Fast Normal Vector Compression with Bounded Error. In A. Belyaev and M. Garland, editors, Proc. Geometry Processing 2007, pages 263-272, 2007.
  Web Page  •  BibTeX  •  Abstract  •  PDF

• PDRIVE: The Projector-based, Desktop, Reach-In Virtual Environment
  

  Gerwin de Haan, Eric J. Griffith, Michal Koutek and Frits H. Post. PDRIVE: The Projector-based, Desktop, Reach-In Virtual Environment. In B. Fröhlich, R. Blach and R. van Liere, editors, Virtual Environments 2007, pages 9-16, 2007.
  Web Page  •  BibTeX  •  Abstract  •  PDF

2008

• Using the Wii Balance Board^TM as a Low-Cost VR Interaction Device
  

  Gerwin de Haan, Eric J. Griffith and Frits H. Post. Using the Wii Balance BoardTM as a Low-Cost VR Interaction Device. Poster presentation at ACM VRST 2008, October 27-29, Bordeaux, France.
  Web Page  •  BibTeX  •  Abstract  •  PDF

Links

These are useful or relevant links I've collected.

• TU Delft Links:
  • Virtual Reality Lab
  • Data Visualization Group
  • Computer Graphics Group
  • Mediamatics Department
  • EWI Faculty
• Group links:
  • Current Projects
  • People
  • Publications
• Useful links:
  • BibTeX entry help
  • Google Scholar
  • ACM Portal
  • IEEE Xplore
  • TU Delft Library

Miscellaneous

• Random Password Generator
  

  I'm not very good at thinking up secure passwords so I wrote this simple CGI program to generate them for me. It uses /dev/random as its source of random numbers to help ensure that the passwords cannot easily be guessed.

• Frequently Encountered English Errors
  

  This is a list I have begun collecting of commonly made mistakes in written or spoken English that I have encountered. I plan to update this list with more examples over time.

• Wii Balance Board^TM Library
  

  This is a small library that Gerwin and I put together to use the Balance Board as a general input device. Since we mostly work with VR, the library is more targeted at VR applications, but there is also a OpenGL demo application.

Contact