1. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s Niels Pinkwart, Christian Schäfer and H. Ulrich Hoppe Research Group COLLIDE Institute for Computer Science and Interactive Systems Gerhard Mercator University Duisburg, Germany

2. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Interests of COLLIDE in the Research Area Ubiquitous computing in educational settings ”Computer-integrated classroom“ Interactive-constructive environments (”collaborative mind tools“) Intelligent integration strategies for applications on mobile devices (from ”front end“ to ”standalone app“)

3. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Specific Conditions for Applications on Mobile Devices Different I/O facilities Restrictions in memory size and processing power Limited communication options (infrared, wireless lan)  Problems with synchronisation and replication of applications, ”lightweight“ integration strategies needed

4. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany ”Lightweight“ Integration Strategies Partial data Restricted view Reduced processing functionality Replication strategy dependent on use case / device Model View Controller

5. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Replication Parameters Communication Type (basic, advanced) (active, passive) Connection Type (snapshot, transaction, merge) Rep. Object Type (model, view, controller) (full, partial) Application Type (standalone,..., front end) (generic, specific)

6. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Replication Parameters Communication Type (basic, advanced) (active, passive) Connection Type (snapshot, transaction, merge) Rep. Object Type (model, view, controller) (full, partial) Application Type (standalone,..., front end) (generic, specific)

7. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Replication Parameters Communication Type (basic, advanced) (active, passive) Connection Type (snapshot, transaction, merge) Rep. Object Type (model, view, controller) (full, partial) Application Type (standalone,..., front end) (generic, specific)

8. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Replication Parameters Communication Type (basic, advanced) (active, passive) Connection Type (snapshot, transaction, merge) Rep. Object Type (model, view, controller) (full, partial) Application Type (standalone,..., front end) (generic, specific)

9. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Replication Parameters – Examples NetMeetingChat (server based) Rep. ObjectView (full)Model (partial to full) ConnectionTransaction based CommunicationBasicAdvanced (passive) Application”Windows-replicated“, generic Standalone application, specific

10. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Cool Modes (Collaborative Open Learning and Modeling System) Shared workspace environment based on visual languages, focus on: Discussion and collaborative modeling support The possibility of mixing different types of visual languages or representations with handwriting and media integration Underlying communication mechanism ”MatchMaker TNG“ flexibly supports collaboration MatchMaker replication characteristics: offers full and partial transaction based replication of models, advanced and active

11. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Lightweight Mobile Extensions of Cool Modes Technical Information: Compaq iPAQ H3630 SavaJe Operating System Java 1.3.1 WLAN Connection MatchMaker TNG used for integration of applications on mobile devices – Client runs on the mobile devices

12. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Lightweight Mobile Extensions of Cool Modes CoolCom Principle: Free-hand annotations in the handwriting layer of a workspace (one per device), all the other layers (graph,...) are transmitted as images from the main application regularly. Thus independent of palettes and potentially of cooperating tool. Lightweight in sense of: local view, partial data (only handwriting strokes), no modeling functionalities Use Case: e.g. in classroom or lectures (private annotations and comments on results on the electronic whiteboard, shareable)

13. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Lightweight Mobile Extensions of Cool Modes CoolCom --- SCREENSHOT COOLCOM ---

14. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Lightweight Mobile Extensions of Cool Modes Cool Modes ME Principle: Usage of the Cool Modes palettes. Only nodes and edges, no further objects on the palettes are supported – reduced number of palettes with respect to the memory. Thus dependent of Cool Modes (yet a standalone tool). Lightweight in sense of: local view, restricted functionality (some palettes need more memory or processing power) Use Case: e.g. for ”outdoor“ experiments and modeling of the results ”in place“ with later-on transfer of the data to the PC environment

15. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Lightweight Mobile Extensions of Cool Modes Cool Modes ME

16. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Replication Parameters of the Cool Modes Extensions CoolComCool Modes ME Rep. ObjectView (partial) and Model (partial) Model (full) ConnectionTransaction basedTransaction based or Snapshot CommunicationAdvanced (mixed active and passive) Advanced (active) Application ”Mobile add-on“, generic, possible but not reasonable as standalone application Standalone application with cooperation support, specific to Cool Modes

17. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA‘s August 2002 Växjö, Sweden Niels Pinkwart University of Duisburg, Germany Questions? pinkwart@collide.info http://www.collide.info