@inproceedings{17161d93d2b7434f8cb89196d4d7f0b5,
title = "Towards Time-sensitive Truth Discovery in Social Sensing Applications",
abstract = "This paper develops a new principled framework for exploiting time-sensitive information to improve the truth discovery accuracy in social sensing applications. This work is motivated by the emergence of social sensing as a new paradigm of collecting observations about the physical environment from humans or devices on their behalf. These observations maybe true or false, and hence are viewed as binary claims. A fundamental problem in social sensing applications lies in ascertaining the correctness of claims and the reliability of data sources. We refer to this problem as truth discovery. Time is a critical dimension that needs to be carefully exploited in the truth discovery solutions. In this paper, we develop a new time-sensitive truth discovery scheme that explicitly incorporates the source responsiveness and the claim lifespan into a rigorous analytical framework. The new truth discovery scheme solves a maximum likelihood estimation problem to determine both the claim correctness and the source reliability. We compare our time-sensitive scheme with the state-of-the-art baselines through an extensive simulation study and a real world case study. The evaluation results showed that our new scheme outperforms all compared baselines and significantly improves the truth discovery accuracy in social sensing applications.",
keywords = "Claim Lifespan, Expectation Maximization, Maximum Likelihood Estimation, Social Sensing, Source Responsiveness, Time-sensitive, Truth Discovery",
author = "Chao Huang and Dong Wang and Nitesh Chawla",
note = "This material is based upon work supported by the National Science Foundation under Grant No. IIS-1447795.; 12th IEEE International Conference on Mobile Ad Hoc and Sensor Systems, MASS 2015 ; Conference date: 19-10-2015 Through 22-10-2015",
year = "2015",
month = dec,
day = "28",
doi = "10.1109/MASS.2015.39",
language = "English (US)",
series = "Proceedings - 2015 IEEE 12th International Conference on Mobile Ad Hoc and Sensor Systems, MASS 2015",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "154--162",
booktitle = "Proceedings - 2015 IEEE 12th International Conference on Mobile Ad Hoc and Sensor Systems, MASS 2015",
address = "United States",
}