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UWM Multimedia Software Lab

UWM Multimedia Software Lab. Ethan Munson Dept. of EECS UW-Milwaukee. Laboratory Goals. Study and create novel software to support better multimedia authoring and browsing tools Style sheets Software environments using hypermedia Multimedia document analysis

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UWM Multimedia Software Lab

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  1. UWM Multimedia Software Lab Ethan Munson Dept. of EECS UW-Milwaukee

  2. Laboratory Goals • Study and create novel software to support better multimedia authoring and browsing tools • Style sheets • Software environments using hypermedia • Multimedia document analysis • Emphasis on language-based solutions • Document specification languages • Style sheet languages

  3. Laboratory Funding • Grant from NSF CAREER program • supports one PhD, one MS student • Subcontract from Center for Adaptive Data-Driven Information Processing (U. Maryland, Baltimore County) • Supports one undergraduate student • Possibly others • Various equipment and software donations • Sun, Macromedia, Eaton

  4. Laboratory Facilities • Laboratory space: 46 m2, open format • Computing facilities • Sun E250 file server (2 Sparcs, 80 GB RAID, Solaris, AFS) • Sun Ultra 10 (4), SGI Indigo 2 (2), HP 715 (2) • Wintel, G3 Mac • Digital video, camcorder, scanner, printers

  5. Laboratory Entrance

  6. More Pictures

  7. Still More Pictures

  8. Our File Server

  9. Projects • Software Concordance • CADIP research • Web image search • Usability of information visualization • User tolerance for GUI delays

  10. Software Concordance • Goal: Improve software development process with hypermedia services • Building Java source-code editor that supports embedded hyper-links and multimedia • Integrated parsing and version control • Links defined manually • XML for non-source-code documents • Will build analysis and visualization tools

  11. Software Concordance • Current status: building editor using • Fluid program analysis suite (CMU/UWM) • Chimera hypermedia toolkit (Colorado) • Kaomi multimedia authoring toolkit (INRIA/Opera) ?? • Tien Nhut Nguyen (PhD student) • Hypermedia infrastructure • Satish Chandra Gupta (MS student) • Source code editor • Interface with Fluid

  12. Retrieving Web Images • MS thesis by Yelena Tsymbalenko • Use HTML metadata (HTML source) to identify images relevant to one-word text query • no image downloading or processing required • Initial results • High precision for some simple forms of metadata • Structural clues not effective • Possible methodologic problems • Current status: need student

  13. Information Visualization Usability • Many visualization techniques for IR data have been proposed • Stereoscopic Field Analyzer (SFA) is one • requires 3D goggles and 2-hand magnetic tracking controls • Goal: test usability of SFA on realistic data sets • These systems have high “face validity”, but little rigorous testing • Current status: beginning research now • Nicholas Bohne (undergraduate)

  14. User Perception of GUI Latency • Goal: understand how fast a GUI must be to make users happy • Is “as fast as possible” necessary or even correct? • First study instrumented MS Word to control delay • Weak results due to bad methodology • Subject’s words don’t match their survey results • videotape may have been a problem

  15. Current Latency Study • What is minimum delay that a user can perceive for each GUI task (menu, button, typing)? • Common wisdom: 100ms • Initial results: 140-180ms • Scientific issues • Turns out to be difficult to study • Subjects have trouble determining whether delay occurred • Does perceptible delay vary with task? • Some evidence, but methodologic problems make result uncertain

  16. Future Latency Research • Improve experimental technique • Measure full probability distribution • Long, boring testing with small number of subjects • Test more GUI tasks • to try to find task differences • Move to studying user preference, rather than perception

  17. Other topics • Formal models of hypermedia and hypermedia design • Two MS theses, possible collaboration with Brazilian researchers

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