Lokasjons- og kontekstbaserte tjenester - Department of Computer ...
Lokasjons- og kontekstbaserte tjenester - Department of Computer ...
Lokasjons- og kontekstbaserte tjenester - Department of Computer ...
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INNHOLD v<br />
Innhold<br />
Forord i<br />
Sammendrag ii<br />
Summary iii<br />
Innholdsliste vii<br />
Figuroversikt viii<br />
Tabelloversikt ix<br />
1 Innledning 1<br />
1.1 Problembeskrivelse . . . . . . . . . . . . . . . . . . . . . . . . . . 1<br />
1.1.1 M˚al for oppgaven . . . . . . . . . . . . . . . . . . . . . . . 2<br />
1.1.2 Oppgaveformulering . . . . . . . . . . . . . . . . . . . . . 2<br />
1.2 Scenario . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3<br />
1.3 Oppgavens struktur . . . . . . . . . . . . . . . . . . . . . . . . . . 4<br />
2 State <strong>of</strong> the art 5<br />
2.1 Generelle systemer . . . . . . . . . . . . . . . . . . . . . . . . . . 5<br />
2.1.1 <strong>Lokasjons</strong>systemer . . . . . . . . . . . . . . . . . . . . . . 6<br />
2.1.2 Informasjonssystemer . . . . . . . . . . . . . . . . . . . . . 8<br />
2.2 Viktige strukturer . . . . . . . . . . . . . . . . . . . . . . . . . . . 10<br />
2.2.1 Hierarkisk organisert data . . . . . . . . . . . . . . . . . . 11<br />
2.2.2 Tre-lags modellen . . . . . . . . . . . . . . . . . . . . . . . 11<br />
2.2.3 Metadata . . . . . . . . . . . . . . . . . . . . . . . . . . . 12<br />
2.2.4 Gazetteers . . . . . . . . . . . . . . . . . . . . . . . . . . . 13<br />
2.2.5 Bayesian Network . . . . . . . . . . . . . . . . . . . . . . . 13<br />
2.3 Kontekstavhengige systemer . . . . . . . . . . . . . . . . . . . . . 14<br />
2.3.1 Nibble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15<br />
2.3.2 RADAR . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16<br />
2.3.3 Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16<br />
2.3.4 Wireless Campus LBS . . . . . . . . . . . . . . . . . . . . 17<br />
2.3.5 Grimstad Museum . . . . . . . . . . . . . . . . . . . . . . 18<br />
2.3.6 AROUND . . . . . . . . . . . . . . . . . . . . . . . . . . . 19<br />
2.3.7 Oppsummering kontekstavhengige systemer . . . . . . . . 20<br />
2.4 Andre forhold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20<br />
2.4.1 <strong>Lokasjons</strong>-sporing <strong>og</strong> posisjon-oppmerksomhet . . . . . . . 21<br />
2.4.2 Service baserte systemer . . . . . . . . . . . . . . . . . . . 21<br />
2.4.3 Screen scraping . . . . . . . . . . . . . . . . . . . . . . . . 21<br />
2.5 Oppsummering state <strong>of</strong> the art . . . . . . . . . . . . . . . . . . . 22<br />
3 Mitt system 23<br />
3.1 Det ideelle systemet . . . . . . . . . . . . . . . . . . . . . . . . . . 23