10. HumansSensors - Large-scale Social Sensing(with Humans...

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1 Large-scale Social Sensing (with Humans as Sensors) Tarek Abdelzaher Dept. of Computer Science University of Illinois at Urbana Champaign Poll Results Winner: “MagnifiSense: Inferring Device Interaction using Wrist-Worn Passive Magneto-Inductive Sensors” (Prepared by: Kashev Dalmia, Ryan Freedman, and Terence Nip) 4.13
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2 Poll Results “RunBuddy: A Smartphone System for Running Rhythm Monitoring” (Prepared by: Ashutosh Dhekne) 3.97 Poll Results “The Potential and Challenges of Inferring Thermal Comfort at Home Using Commodity Sensors” (Prepared by: Chien-Ying Chen, Rohan Tabish, and Jongdeog Lee) 3.93
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3 Poll Results “Evaluating Tooth Brushing Performance with Smartphone Data” (Prepared by: Syeda Persia Aziz and Shegufta Bakht Ahsan) 3.86 Poll Results “When Attention is not Scarce; Detecting Boredom from Mobile Phone Usage” (Prepared by: Bilge Acun, Zhangxiaowen Gong, and Mengjia Yan) 3.85
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4 Poll Results “Tracking Motion Context of Railway Passengers by Fusion of Low- Power Sensors in Mobile Devices” (Prepared by: Xiaoming Chen, Hathfi B. Hakim, and Piyush Shrivastava) 3.81 Poll Results “ZapDroid : Managing Infrequently Used Applications on Smartphones” (Prepared by: Tejala Thippeswamy and Madhushree Sreenivasa) 3.38
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5 Earthquake Shakes Twitter Users Using Humans as Sensors: Assumption: Each Twitter user is regarded as a sensor. A sensor detects a target event and makes a report probabilistically Assumption: Each tweet is associated with a time and location, which is a set of latitude and longitude Earthquake Shakes Twitter Users Using Humans as Sensors:
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6 Event Detection: The Classifier Not all occurrences of a keyword (e.g., “earthquake” or “shaking” is about an ongoing event: I am afraid of earthquakes Shaking hands with boss How to solve this? (How to classify occurrences that constitute “sensing” of an ongoing event from others?) Event Detection: A Probabilistic Model Spikes in occurrence of related keywords help detect corresponding events: Earthquake-related keywords Typhoon-related keywords When a user detects an event at time 0, the time to make a tweet follows and exponential distribution.
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  • Fall '15
  • TarekAbdelzaher
  • Computer Science, Maximum likelihood, Estimation theory, Hurricane Sandy, Expectation Maximization

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