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Presentation @ SSN'11 workshop @ ISWC'11
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Copyright 2011 Digital Enterprise Research Institute. All rights reserved.
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Annotating Microblog Posts with Sensor Data for Emergency Reporting
ApplicationsDavid N. Crowley, Alexandre Passant,
John G. Breslin
Electrical & Electronic EngineeringCollege of Engineering and Informatics
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Why Microblogging?
Short format – 140 characters Mobile Web or Mobile Apps available for most
phones/all smartphones (Almost) Real-Time Posts Removes barriers to posting – short/mobile User Growth (Twitter)
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Why Twitter?
100 million active users Growth from 65 to 200 million posts per day in 1
year Available in many languages (11), most countries Information Network/Social Network Twitter APIs Twitter Annotations
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Twitter Annotations
forthcoming initiative by Twitter attach arbitrary metadata to any tweet Low limit to begin then expanding
Going beyond geotemporal annotations “type”:{“attribute”:”value”} “type”:{“title”:”avatar”}
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Twitter Annotations (2)
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Sensors (Smartphones)
Accelerometer Magnetometer
Digital Compass Accelerometer + Magnetometer = Orientation
Gyroscope Microphone Camera Proximity GPS Light
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
SIOC
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
SIOC (2)
Semantically Interlinked Online Communities Represents rich social data using RDF Describes Web-based discussion SIOC Types (sioct) Module
Microblog MicroblogPost
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Combining SIOC & SSN
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Combining SIOC & SSN (2)
Describing post and sensor metadata
Create SIOC Sensors (siocs) Module has_sensor_data
– joins sioct:MicroblogPost to ssn:Observationvalue
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Annotated Microblog Post
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Modelling Mobile Sensors
Activity Walking/Running/Standing Car/Bike (Moving/In Traffic)
Direction Compass – Orientation of device
Noise Levels Location through Wi-fi (without GPS) Light Levels Temperature Pressure
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Scenario
Emergency Situation London Riots Natural Disasters
User can enter “Emergency Mode” in Semantic Microblogging application on mobile Device All sensor metadata available attached to post
– And available to Emergency Teams
User direction (traveling or facing) Recent activity
Noise levels Light levels
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Challenges
Privacy – User data Quality of data
Availability of data Modelling sensors to add context
Sensors of varying type Varying frequency Aggregating/modelling sensor data over time
Data reliability – provenance? – user profiling? Usability – low effort posting of metadata
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Future Work
Survey – to evaluate users’ desire to share sensor data
Build Mobile Semantic Microblogging application
Model sensors (Android devices) Create User Evaluations of application Different scenarios – traffic applications