CS 575Spring 20102010-05-15

K.V. Bapa Rao

Outline

• Administrative• Review of previous class• Student Presentations• Licklider’s papers• RDF Overview• General Discussion• Summary• Agenda for next meeting

Administrative

Student Presentations

• Hanish Patel: Psychological • Pratyush Mishra: Robotics• Jwalant Desai: Social Networking• Niteen Borge: Accessibility/ Handicapped

REMINDER: A [flexible] structure for our study

• ‘Human issues’ is all-encompassing• Many interlocking dimensions• Human roles vis-à-vis the computer

– User– Inventor / researcher– Visionary– Content creator– Hacker– Criminal– Business person– Wealth generator– …

• Human-computer coupling– Symbiosis, tool, …

A [flexible] structure for our study (contd)

• Domains of human activity– Education, Entertainment, Play, Family, Reproduction, Art ,Wealth generation,

Government, consumption, religion, philosophy, …• Values

– Many values depend on role, domain, …– Absolute values?– Creativity, aesthetics, access, opportunity, freedom, spirituality, rationality,

peace, brotherhood, prosperity, …• Vision, potentials, realities

– Babbage’s Analytical Engine, Bush’s Memex, …• Pragmatics

– Is it possible? How to get there?– Techniques, Design, Technology,

• Scaling and emergent phenomena– Will a whole new thing emerge if huge numbers of humans interact with

computers in a certain way? How do we understand that ‘thing’?• Other aspects, dimensions?

Engelbart: Two-domain system

• H-LAM/T

JCR Licklider: Human-computer symbiosis

• Issues– Speed mismatch– System requirements (hardware, memory, …)– Organizational mismatch: Memory organization

(Information structuring and retrieval)– Language mismatch• What versus how

– I/O mismatch• Voice, mobile, touch, …

Computer as communication device

• “In a few years, men will be able to communicate more effectively through a machine than face to face”

• What is communication?– Two tape recorders exchanging data– Two humans having a meeting– Collaborative Modeling

Licklider Contd--Economics

• Models are complex• Simplification is risky and dangerous– Oversimplification– Premature simplification

• Communicating models is expensive– Cost of not doing it?

Licklider Contd

• Computer as switch vs. interactor• Distributed intellectual resources– ‘critical creative mass’

• Vision of internet– Store-and-forward technology

• Economics: billing models

Vision of internet

• Node• Mediator for online life: OLIVER• Social groups• Better for individual• Better for society

A Concrete Example: Overview of RDF

• http://www.w3schools.com/rdf/rdf_intro.asp

Summary

• Licklider thought through some of the issues of the human-computer interface modeled by Engelbart, at one extreme (symbiosis)– Impedance mismatch

• RDF is a concrete example of the merger of communication and semantics for data (ref to Berners-Lee)

• Licklider’s vision of internet was based on a rich concept of communication

Led to TCP/IP

Agenda for next week