Search Results for author: Shubhranshu Shekhar

Found 7 papers, 4 papers with code

NetEffect: Discovery and Exploitation of Generalized Network Effects

1 code implementation31 Dec 2022 Meng-Chieh Lee, Shubhranshu Shekhar, Jaemin Yoo, Christos Faloutsos

Given a large graph with few node labels, how can we (a) identify whether there is generalized network-effects (GNE) or not, (b) estimate GNE to explain the interrelations among node classes, and (c) exploit GNE efficiently to improve the performance on downstream tasks?

Graph Mining Node Classification

Unsupervised Machine Learning for Explainable Health Care Fraud Detection

no code implementations5 Nov 2022 Shubhranshu Shekhar, Jetson Leder-Luis, Leman Akoglu

The US federal government spends more than a trillion dollars per year on health care, largely provided by private third parties and reimbursed by the government.

Fraud Detection

Less is More: SlimG for Accurate, Robust, and Interpretable Graph Mining

1 code implementation8 Oct 2022 Jaemin Yoo, Meng-Chieh Lee, Shubhranshu Shekhar, Christos Faloutsos

Graph neural networks (GNNs) have succeeded in many graph mining tasks, but their generalizability to various graph scenarios is limited due to the difficulty of training, hyperparameter tuning, and the selection of a model itself.

Graph Mining Node Classification

Benefit-aware Early Prediction of Health Outcomes on Multivariate EEG Time Series

no code implementations11 Nov 2021 Shubhranshu Shekhar, Dhivya Eswaran, Bryan Hooi, Jonathan Elmer, Christos Faloutsos, Leman Akoglu

Given a cardiac-arrest patient being monitored in the ICU (intensive care unit) for brain activity, how can we predict their health outcomes as early as possible?

Decision Making EEG +2

gen2Out: Detecting and Ranking Generalized Anomalies

1 code implementation6 Sep 2021 Meng-Chieh Lee, Shubhranshu Shekhar, Christos Faloutsos, T. Noah Hutson, Leon Iasemidis

Our main contribution is the gen2Out algorithm, that has the following desirable properties: (a) Principled and Sound anomaly scoring that obeys the axioms for detectors, (b) Doubly-general in that it detects, as well as ranks generalized anomaly -- both point- and group-anomalies, (c) Scalable, it is fast and scalable, linear on input size.

Anomaly Detection EEG

FairOD: Fairness-aware Outlier Detection

1 code implementation5 Dec 2020 Shubhranshu Shekhar, Neil Shah, Leman Akoglu

Fairness and Outlier Detection (OD) are closely related, as it is exactly the goal of OD to spot rare, minority samples in a given population.

Fairness Outlier Detection

Incorporating Privileged Information to Unsupervised Anomaly Detection

no code implementations6 May 2018 Shubhranshu Shekhar, Leman Akoglu

We introduce a new unsupervised anomaly detection ensemble called SPI which can harness privileged information - data available only for training examples but not for (future) test examples.

Unsupervised Anomaly Detection

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