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E-Commerce Current and Emerging E-Commerce multimedia information systems, such as medical database, news archive, broadcast.com, on-line library, etc. • need more interactivity tele-control, such as remote monitoring • can be extended to remote diagnosis, remote vehicle control, etc. • need better multimedia support over Internet on-line banking and purchasing • need interoperability and efficient global transaction processing book stores, computer stores, CD records • current applications does not require sophisticated visualization • consider purchasing cloth,customized furniture, house • need graphical simulation and personalization E-Commerce Current Focus globally interoperable information system among all entities • e.g., defense people will know all their suppliers and the status of the supplies in stock • funded ECRC to educate business to get on line • e.g., medical information system (statistics) • e.g., Dell sends parts order immediately after clients' order research • workflow modeling and automation • security: how to authorize or authenticate these accesses E-Enterprise Extend to E-Enterprise to consider non-commercial applications e.g., intelligent education system -- collect information on web e.g., virtual museum, virtual zoo: allow camera control and multimedia visualization e.g., remote virtual reality training for astronauts remote vehicle control for cargo transportation remote diagnosis for doctors or repair service Our Research Focus Develop MEE enabling technologies Build MEE subsystems, middlewares, standards, design patterns, and tools to facilitate the development of MEE application systems highly customizable highly reliable/available/secure high performance Research Topics Web Server Systems Design MEE server subsystem • availability, load balancing, etc. MEE middleware for QoS assurance • integrated QoS considering admission control and network QoS global transaction processing technology support agent execution -- security issues Integrated Interface virtual strip with stores and officies each store or office can link to multiple sites personal database to guide the information organization/display Integrated MEE User Interface Book Store Cloth Store Office User can build a virtual strip to handle everything in his daily life A store can be linked to several web sites • use agents to go to various store to retrieve information • use wrapping technology to help infor. organization • use personal database to guide the display of the infor. From office, the user can do all his work Repair Services Doctors • contains a file system that can retrieve all user files • the physical files can be anywhere and files migrate when necessary if no conflicts (e.g.,security) • accesses to files in different file systems require virtual display support On-line telephony to talk to others Visualization support for cloth, furniture shops Integrated MEE User Interface Server User Server Integrated Interface A Personal Database Integrated MEE User Interface Information wrapping define a standard framework for structuring any information site • break information to segments, tag the information, and define relationship of the information • potential candidate: XML Personal database define a framework for extracting and storing personal information • historical, user defined, specified on the fly • links, preferences, personal data Information organization define methods for information filtering and selection • e.g., for purchasing a book: filter out entries with price above range, select an entry if multiple are found, etc. Research Projects Information wrapping, retrieving, and organization Personal Database Information organization Xiao-Dong Wang Interface (Virtual Strip) implement a tool (in Java) for construction of virtual city modify netscape to allow invocation of the tool for each block, set up links to web sites and to personal database try to define the framework and entries in the personal database for the implementation of a virtual book store Research Projects File System build a file system (as part of the personal database) the file system stores tuples: (file name, location, software for accessing it, attributes) when a file is accessed, the corresponding software to manipulate the file should be invoked locally or remotely modify netscape to list files in the file system modify netscape to fetch the file when a file is selected, if the access software is not local, then a virtual window should be used to display and manipulate the file migration, replication, caching issues • Kelly Dougherty • the home page cannot migrate due to the fixed reference address MEE Server Subsystem Model Distributed servers clustered locally distributed over WAN Distribution algorithms S C C S C help clients/agents get to the nearest node with the lowest load WWW C S D S S ... 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S MEE Server Subsystem Client sends agent to obtain services (instead of request) agent could go to multiple sites to collect information agent could replicate itself for fault tolerance Server should support agent execution security issues agent migration S C S agent S C Research Projects Implement server subsystem implement a randomized agent/request distribution algorithm implement agent replication implement agent migration integrate the system with netscape and apache Security for agent-based approach authentication and code verification Ajay Sachdev Support web file system implement a middleware that supports file system migration and replication among a give set of servers Global Transaction Processing Processing transactions involving multiple databases interoperability, atomicity Processing transactions on widely distributed systems how to minimize the latency while assuring atomicity Transaction processing on locally distributed systems using a shared storage hierarchy (main memory + disk) reliable shared storage (replicaiton) Transfer $10K from a to b Deposite $10K to b in DB-B + fail Deduct $10K from a in DB-A Research Projects Implement a shared memory subsystem application program define object space • one indexing system for each object space • indexing system is fully replicated on all servers information for all object spaces is stored on all servers objects space attributes • structure, memory/disk, replicated/single-copy, migratable functions • object space definition functions (specify all attributes) • lock/unlock/read/write • execute an entire transaction on the object object replication migration -- decision functions Research Projects Two phase commit protocol implement on top of the shared storage system TCB space in memory, primary-backup replication index/lock space in memory, fully replicated on all servers database on disk, none or RAID replication • periodic updatae RAID scheme (use time stamp to control) Shian-Shing Shiu Global transaction processing transactions involving multiple databases QoS Middleware Integration of network level and system level QoS control Systems Layer Network Layer multimedia server admission control integrated service differentiated service QoS for wireless networks simulation of an algorithm IP routing IP look up simulation to compare the performance of a few IP lookup algorithms Concurrent Control with Virtual Presence Synchronize concurrent accesses group requests and multicast multimedia information Service admission control C C WWW Coordination among remotely controlled units group and multicast common view coordinate to achieve a common goal e.g., tele-controlled vehicles S S D C D D Multimedia Education Systems Algorithm Animation e.g., animate the execution of a tree node deletion implement a tool that supports algorithm animation • • • • map program objects to graphical objects insert action in program to display the program/graphics objects insert interactive buttons for user control insert parameterized speech for algorithm explaination Web Lecture System install the WLS software examine the functions of client server interaction examine the functions of video recording