Meeting Minutes (08/31/2009)

• COMMENTs about current visualization result
• The videos of both color mapping schemes (linear and log) can be placed side by side for comparison. This will provided the user with the ability to identify which color mapping is suitable for which time step. Probably linear mapping is more appropriate for a range of time steps and log mapping is suitable for the rest.
  
• The color mapping can only consider the scalar inside the limited range, eg, 95% of the scalar range, since the scalar distribution should be closed to Gaussian distribution.
• Currently, the rendering of the cross section is more effective to them than the volume rendering of the entire toroid.
  
• NEXT STEPS: the next variables/objectives to visualize:
• The particle, which is in the 6 dimension (3D for location + 2D for velocity + 1D for time)
• To visualize the trajectory of each individual particle
• To visualize its correlation of the particle motion with Eddy.This is actually an interesting visualization problem since the the eddy (4D: 3D space + 1D time) and the particle (6D) are in different dimensions. How to see the correlation between 2 variables coming from two spaces with different dimensions? Will it be more approachable if the two variables are reduced to the same dimensions?
  
• Ion Heat Flux, which is indirectly related to the particle motion since the heat flux carries the particles.
• They are interested to look at the heat flux for a fixed cross section over time. Time constitutes the third dimension of the hypothetical volume where the cross-section itself is 2D.
  
• The correlation between the heat flux and the eddy.
• Create iso-surface of heat flux over time and calculate the related quantities (e.g. the internal volume and the moving direction)
• TO DO
• Create a blog to share information, feedback, and comments
  
• Study references
  
• The measurement of quantitative information of iso-surfaces (eg. Contour spectrum)
• Multivariate analysis and visualization
  
• QUESTIONS
1. What's the index of heat flux? So far we only know that phi is the first variable.
2. Where to get the particles data? Is it included in the data we already have?
3. Which variable's isosurface and which iso-value should be looked for?
4. Which cross sections are more important?