1 code implementation • 5 Oct 2022 • Buddhika Nettasinghe, Samrat Chatterjee, Ramakrishna Tipireddy, Mahantesh Halappanavar
Conformal prediction is a widely used method to quantify the uncertainty of a classifier under the assumption of exchangeability (e. g., IID data).
no code implementations • 13 Jul 2022 • Buddhika Nettasinghe, Kowe Kadoma, Mor Naaman, Vikram Krishnamurthy
The exact value of exposure to a piece of information is determined by two features: the structure of the underlying social network and the set of people who shared the piece of information.
no code implementations • 27 Sep 2021 • Rui Luo, Buddhika Nettasinghe, Vikram Krishnamurthy
This paper studies detecting anomalous edges in directed graphs that model social networks.
no code implementations • IEEE Transactions on Knowledge and Data Engineering 2019 • Buddhika Nettasinghe, Vikram Krishnamurthy
In this paper, we propose a novel neighborhood expectation polling (NEP) strategy that asks randomly sampled individuals: what is your estimate of the fraction of votes for A?
no code implementations • 1 Aug 2019 • Buddhika Nettasinghe, Vikram Krishnamurthy
Although power-law degree distributions are ubiquitous in nature, the widely used parametric methods for estimating them (e. g. linear regression on double-logarithmic axes, maximum likelihood estimation with uniformly sampled nodes) suffer from the large variance introduced by the lack of data-points from the tail portion of the power-law degree distribution.
Social and Information Networks Data Analysis, Statistics and Probability Physics and Society
1 code implementation • 13 May 2019 • Nazanin Alipourfard, Buddhika Nettasinghe, Andres Abeliuk, Vikram Krishnamurthy, Kristina Lerman
For example, in an online network of a social media platform, the number of people who mention a topic in their posts---i. e., its global popularity---can be dramatically different from how people see it in their social feeds---i. e., its perceived popularity---where the feeds aggregate their friends' posts.
Social and Information Networks Physics and Society