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Q11 Answers

• I really like the visualizations that show protein structure, interesting example for usage of 3D. are there any new improved methods addressing protein visualization?  

• maybe I did miss some stuff but I am not that impressed by some of the genome browsers / viewers (e.g. GenomeView ). they might already be older but then why include them into this task view?  

• does this Orchestral stuff really work? is sound considered a valid auxiliary tool for visualization?  

• As this stuff is already several years old: Are there visualization requirements for different non-vis journals? Similarily to choosing best practice methods in statistical methology? I am really amazed by the quality given the "age" of these methods. They are already several years old. (Why) Is there no adaption of these techniques by various journals?  

• is the mapping to a globe in 3D space considered good practice? I am not sure whether in this glimmer video everything was in 2D or not, but it also did an awesome job.  
  I could imagine that using the 3D space the positioning of the tree branches becomes easier (more degrees of freedom), so it's mainly because of that, but I am still curios whether there are other reasons  

• I understand the functionality of the magic lense for 2D. How could a magic lense work in 3D?  

• How can one decide the size and the shape of the magic lense and is this dependent on the data?  

• Can you superimpose multiple layers and would this be effective?  

• In the video "tj.present.avi", while presenting a small tree, I've found it a little bit hard to understand, which color what kind of information stands for.  

• In "h3.mp4": she says that drawing all the nodes creates a messy picture and this visualization's using only a subset of nodes. What's the best way to figure out how many subsets should the visualization contain in order to keep it readable?  

• In "2002 spacetree": the video shows 2 kinds of representations, a tree visualization and a hyperbolic one. But even if in the tree visualization the single nodes can be extended, doesn't have this one limitations in scalability against the hyperbolic one?  

• How efficient is the Space Tree? 

• Is there ever a reason to have a hyperbolic browser to be in 3D space instead of 2D space or is it just because back then 3D was "in"?  

• Why would one use a hyperbolic browser to browse the web? Is this just an arbitrary example? It seems very impractical, because it displays all linked sites as children of a node and some websites (like wikipedia) have thousands of outgoing links.  

• The linked view in Tree Juxtaposer [min 1:45] is only partially linked, because manipulating the space of one tree manipulates the space of the other tree less, why is this?  

• How does the color coding in Tree Juxtaposer work? They say its based on the distance to the root, but it does not seem like that at all, since everything seems to have the same grayscale value with some nodes randomly being brighter than the rest.  

• In the Video about the H3Viewer and the TreeJuxtaposer, there is mentioning of the rendering Algorithms involved to assure a smooth and optimized rendering process. Is this still the case with modern Visualitation techniques? How strong is the connection between Computer Science disciplines like Parallel Computing(CUDA and so on)? What Visualisation techniques are pushing the boundaries of rendering today? 

• Seeing those visualisations of trees, I was reminded of some more general questions I have. I really liked the H3 Viewer and how it visualises nodes, but it is 3D and 3D is having a bad stigma. We say that the trend now is that 2D visualisations are better and easier to understand than 3D ones and we have multiple examples to show that. However my question is: Are 3D vis worse in themselves or are they bad because we interact with them through a 2D screen at the moment? Do you think the bad opinion we have on 3D visualisations would change if we had a 3D hologram in front of our eyes that would enable us all kinds of direct interactions? And even if the answer is still no, is it a matter of badness of the 3D visualisation still, or is it a matter of getting used to/adapting to a new technology?