Arild JansenAFIN & IfI , UiO /: [email protected]22.08.03/ 1 INF5210 Informasjon Infrastructures About the course » Lectures » 2 Mandatory deliveries – 26.9 and 24.10 – Articles to be presented – Themes for group work » The formation of groups » Final exam (Essay) 14.11 – 5.12 Introduction to Information Infrastructure theories Brief overview of II in Norwegian public sector
INF5210 Informasjon Infrastructures. About the course Lectures 2 Mandatory deliveries 26.9 and 24.10 Articles to be presented Themes for group work The formation of groups Final exam (Essay) 14.11 – 5.12 Introduction to Information Infrastructure theories - PowerPoint PPT Presentation
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Issues : Why infrastructures - some different perspectives A brief overview of the course What is an infrastructure - 1 The economics of infrastructures Infrastructures in Norwegian public sector # public
infrastructures
Background literature:» Hanseth, Ole:
http://www.ifi.uio.no/~oleha/Publications/ib_ISR_3rd_resubm2.html Ciborra et al: From Control to drift, kap. 2,4 and 5
Issues : Why infrastructures - some different perspectives A brief overview of the course What is an infrastructure - 1 The economics of infrastructures Infrastructures in Norwegian public sector # public
infrastructures
Background literature:» Hanseth, Ole:
http://www.ifi.uio.no/~oleha/Publications/ib_ISR_3rd_resubm2.html Ciborra et al: From Control to drift, kap. 2,
A substructure or underlying foundation; esp., the basic installations and facilities on which the continuance and growth of a community, state, etc. depends as roads, schools, power plants, transportation and communication systems, etc."
Information systems – the traditional approach:» One main purpose (solve one specific task)» Limited (homogeneous) user group » Assumes (often) centralised control by one
organisation or group» Standards are either neglected or taken as granted» Specific birth day and day of death
– Installed base are neglected
» Need not be always available (down time is acceptable or even desirable)
Star and Ruhleder (1996): Steps to an ecology of knowledge)
Embeddedness Transparency Reach of scope Learned as part of membership Links with conventions of practice Embodiments of standards Built on an installed base Becomes visible upon breakdown
Is universal design possible and desirable Examples: OSI-protocols (X.25, X.400), EDIFACT,
SAP, electronic patient-journal » Top-down development, » Uniform and standardized network on all levels» The goal is the perfect solution including most
facilities» ’Closed world» Centralized control » Monolithic organization
The idea of packet switching and datagrams (Kleinrock) » Distributed, digital and redundancy (Baran)» IMPs : how to avoid n*(n-1)/2 (Kahn) » Symmetric protocols (NCP, SMTP. FTP….)
Open Architecture Networking » TCP/IP and black boxes: routers/gateways (Cerf, Kahn)» Open network of independent network and No global
control » Best offer service – transmit and retransmit » End-to-End responsibilities for error check, flow control » Domain Name System
Incorporation of TCP/IP in Unix BSD WWW: URL, HTTP and HTML
» Det nasjonale helsenettet bygges opp gjennom regionale helsenett i de 5 helseregionene. ... http://www2.telemed.no/telemed_i_bruk/tjenester/helsenett.html