Presentation @ SSN'11 workshop @ ISWC'11

1. Digital Enterprise Research Institute www.deri.ie
Annotating Microblog Posts with
Sensor Data for Emergency
Reporting Applications
David N. Crowley, Alexandre Passant,
John G. Breslin
Electrical & Electronic Engineering
Copyright 2011 Digital Enterprise Research Institute. All rights reserved.
College of Engineering and Informatics
Enabling Networked Knowledge

2. Why Microblogging?
Digital Enterprise Research Institute www.deri.ie
 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)
Enabling Networked Knowledge

3. Why Twitter?
Digital Enterprise Research Institute www.deri.ie
 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
Enabling Networked Knowledge

4. Twitter Annotations
Digital Enterprise Research Institute www.deri.ie
 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”}
Enabling Networked Knowledge

5. Twitter Annotations (2)
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge

6. Sensors (Smartphones)
Digital Enterprise Research Institute www.deri.ie
 Accelerometer
 Magnetometer
 Digital Compass
 Accelerometer + Magnetometer = Orientation
 Gyroscope
 Microphone
 Camera
 Proximity
 GPS
 Light
Enabling Networked Knowledge

7. SIOC
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge

8. SIOC (2)
Digital Enterprise Research Institute www.deri.ie
 Semantically Interlinked Online Communities
 Represents rich social data using RDF
 Describes Web-based discussion
 SIOC Types (sioct) Module
 Microblog
 MicroblogPost
Enabling Networked Knowledge

9. Combining SIOC & SSN
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge

10. Combining SIOC & SSN (2)
Digital Enterprise Research Institute www.deri.ie
 Describing post and sensor metadata
 Create SIOC Sensors (siocs) Module
 has_sensor_data
– joins sioct:MicroblogPost to ssn:Observationvalue
Enabling Networked Knowledge

11. Annotated Microblog Post
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge

12. Modelling Mobile Sensors
Digital Enterprise Research Institute www.deri.ie
 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
Enabling Networked Knowledge

13. Scenario
Digital Enterprise Research Institute www.deri.ie
 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
Enabling Networked Knowledge

14. Challenges
Digital Enterprise Research Institute www.deri.ie
 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
Enabling Networked Knowledge

15. Future Work
Digital Enterprise Research Institute www.deri.ie
 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
Enabling Networked Knowledge