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DATAMAN Project: Towards a Mosaic-Like Location-Dependant
[sic] Information Service for Mobile Clients
Arup Acharya, Tomasz Imielinski, B.R. Badrinath, Rutgers WINLAB
Map-centric approach: a web page defines a service with specific
temporal and spatial scope,
implemented as cgi-bin scripts that get the user's current location from
- Temporal and spatial scope of page data is attached to page
- Resource-adaptive links: page has associated set of rsrc
requirements necessary for client to retrieve it. This isn't
really resource adaptivity, IMHO -- if client doesn't have the
required resources, it loses.
- Narrowcast: seems like broadcast to the client, but request is
intelligently routed to the one appropriate server (based on
location, time, etc. info). Ncast is proposed as a network
- Delta publication: send only the changes since last accessed.
Very similar to Schilit et al. Customizing Mobile Apps, but
less general. Narrowcast idea is interesting, but no mention of how to
- Resource annotations are not adaptive, but limiting.
- Is research general enough to support non-map-centric apps (eg
- No description of how to actually do narrowcast, and only a weak
argument that it is needed (as opposed to, say, replication or
querying a nameserver instead of putting new stuff in the network
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