scratchpad是个好东西之May20：493 review - Collaborative Systems and Social

493 final review - Collaborative Systems and Social Computing

CSCW: computer supported cooperative work = groupware = collaborative systems

social computing: larger-scale systems and use of social network data for collaboration, coordination, social activity

Collaboration

types of systems:

Computer-Mediated Communication

Information access

Collaborative Workspaces

collective memory

Misc (workflow, process and coordination, software engineering)

Computer-Mediated Communication

•  Text-based spaces •  Shared media spaces •  Scientific collaboratories •  Large-scale social spaces •  Large-scale multimedia spaces •  Games

Collaborative Workspaces

1. meeting support (group (decision) support system, media spaces)
2. collaborative info spaces 存放信息资源
3. info visualization
4. versioning

Social requirements in collaborative technologies 

Technical issues in distributed and collaborative systems

❑  Session management (working solutions) 

❑  Data storage and replication (working solutions) 

❑  Concurrency control (understanding of the problem) 

❑  Access control, roles 

❑  Notification, awareness, and privacy

❑  Higher level tools

1.         difference between distributed and collaborative systems 

❑  Resource sharing

❑  Openness 

❑  Concurrency 

❑  Scalability         

❑  Fault tolerance 

❑  Transparency

1.         kinds of distributed transparency

1. access (local/remote), location (where), replication复制, concurrency, failure

2.         new technical mechanisms

1. standard retrieval
2. collaborative filtering aka recommender systems: 社交检索retrieve信息

1. technical prob: sparse data, cold start

3. reputation systems: determine trust levels socially (rate, web of trust, bayesian network(pagerank))