Leman Akoglu

Orcid: 0000-0003-3026-5731

According to our database1, Leman Akoglu authored at least 152 papers between 2008 and 2024.

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Bibliography

2024
Uncertainty-aware Human Mobility Modeling and Anomaly Detection.
CoRR, 2024

Zero-shot Outlier Detection via Prior-data Fitted Networks: Model Selection Bygone!
CoRR, 2024

Outlier Detection Bias Busted: Understanding Sources of Algorithmic Bias through Data-centric Factors.
CoRR, 2024

End-To-End Self-tuning Self-supervised Time Series Anomaly Detection.
CoRR, 2024

On the Detection of Reviewer-Author Collusion Rings From Paper Bidding.
CoRR, 2024

Improving and Unifying Discrete&Continuous-time Discrete Denoising Diffusion.
CoRR, 2024

Pard: Permutation-Invariant Autoregressive Diffusion for Graph Generation.
CoRR, 2024

Descriptive Kernel Convolution Network with Improved Random Walk Kernel.
Proceedings of the ACM on Web Conference 2024, 2024

Fast Unsupervised Deep Outlier Model Selection with Hypernetworks.
Proceedings of the 30th ACM SIGKDD Conference on Knowledge Discovery and Data Mining, 2024

Machine Learning in Finance.
Proceedings of the 30th ACM SIGKDD Conference on Knowledge Discovery and Data Mining, 2024

2023
A Comprehensive Survey on Graph Anomaly Detection With Deep Learning.
IEEE Trans. Knowl. Data Eng., December, 2023

Density of states for fast embedding node-attributed graphs.
Knowl. Inf. Syst., June, 2023

On Using Classification Datasets to Evaluate Graph Outlier Detection: Peculiar Observations and New Insights.
Big Data, June, 2023

Benefit-aware early prediction of health outcomes on multivariate EEG time series.
J. Biomed. Informatics, March, 2023

Detecting Anomalous Graphs in Labeled Multi-Graph Databases.
ACM Trans. Knowl. Discov. Data, February, 2023

Data Augmentation is a Hyperparameter: Cherry-picked Self-Supervision for Unsupervised Anomaly Detection is Creating the Illusion of Success.
Trans. Mach. Learn. Res., 2023

The Need for Unsupervised Outlier Model Selection: A Review and Evaluation of Internal Evaluation Strategies.
SIGKDD Explor., 2023

Deep Anomaly Analytics: Advancing the Frontier of Anomaly Detection.
IEEE Intell. Syst., 2023

Heterophily and Graph Neural Networks: Past, Present and Future.
IEEE Data Eng. Bull., 2023

End-to-End Augmentation Hyperparameter Tuning for Self-Supervised Anomaly Detection.
CoRR, 2023

From Explanation to Action: An End-to-End Human-in-the-loop Framework for Anomaly Reasoning and Management.
CoRR, 2023

DSV: An Alignment Validation Loss for Self-supervised Outlier Model Selection.
Proceedings of the Machine Learning and Knowledge Discovery in Databases: Research Track, 2023

19th International Workshop on Mining and Learning with Graphs (MLG).
Proceedings of the 29th ACM SIGKDD Conference on Knowledge Discovery and Data Mining, 2023

KDD Workshop on Machine Learning in Finance.
Proceedings of the 29th ACM SIGKDD Conference on Knowledge Discovery and Data Mining, 2023

From Detection to Action: a Human-in-the-loop Toolkit for Anomaly Reasoning and Management.
Proceedings of the 4th ACM International Conference on AI in Finance, 2023

ADAMM: Anomaly Detection of Attributed Multi-graphs with Metadata: A Unified Neural Network Approach.
Proceedings of the IEEE International Conference on Big Data, 2023

Self-Supervision for Tackling Unsupervised Anomaly Detection: Pitfalls and Opportunities.
Proceedings of the IEEE International Conference on Big Data, 2023

2022
ACM WSDM 2022 report.
SIGWEB Newsl., 2022

Unsupervised Machine Learning for Explainable Medicare Fraud Detection.
CoRR, 2022

Graph Anomaly Detection with Unsupervised GNNs.
CoRR, 2022

A Practical, Progressively-Expressive GNN.
CoRR, 2022

Towards Unsupervised HPO for Outlier Detection.
CoRR, 2022

Understanding the Effect of Data Augmentation in Self-supervised Anomaly Detection.
CoRR, 2022

Summarizing Labeled Multi-graphs.
Proceedings of the Machine Learning and Knowledge Discovery in Databases, 2022

A Practical, Progressively-Expressive GNN.
Proceedings of the Advances in Neural Information Processing Systems 35: Annual Conference on Neural Information Processing Systems 2022, 2022

Dual-discriminative Graph Neural Network for Imbalanced Graph-level Anomaly Detection.
Proceedings of the Advances in Neural Information Processing Systems 35: Annual Conference on Neural Information Processing Systems 2022, 2022

Hyperparameter Sensitivity in Deep Outlier Detection: Analysis and a Scalable Hyper-Ensemble Solution.
Proceedings of the Advances in Neural Information Processing Systems 35: Annual Conference on Neural Information Processing Systems 2022, 2022

Sparx: Distributed Outlier Detection at Scale.
Proceedings of the KDD '22: The 28th ACM SIGKDD Conference on Knowledge Discovery and Data Mining, Washington, DC, USA, August 14, 2022

KDD Workshop on Machine Learning in Finance.
Proceedings of the KDD '22: The 28th ACM SIGKDD Conference on Knowledge Discovery and Data Mining, Washington, DC, USA, August 14, 2022

From Stars to Subgraphs: Uplifting Any GNN with Local Structure Awareness.
Proceedings of the Tenth International Conference on Learning Representations, 2022

D.MCA: Outlier Detection with Explicit Micro-Cluster Assignments.
Proceedings of the IEEE International Conference on Data Mining, 2022

Toward Unsupervised Outlier Model Selection.
Proceedings of the IEEE International Conference on Data Mining, 2022

2021
C-AllOut: Catching & Calling Outliers by Type.
CoRR, 2021

Detecting Changed-Hands Online Review Accounts.
CoRR, 2021

A Large-scale Study on Unsupervised Outlier Model Selection: Do Internal Strategies Suffice?
CoRR, 2021

Automatic Unsupervised Outlier Model Selection.
Proceedings of the Advances in Neural Information Processing Systems 34: Annual Conference on Neural Information Processing Systems 2021, 2021

SUOD: Accelerating Large-Scale Unsupervised Heterogeneous Outlier Detection.
Proceedings of the Fourth Conference on Machine Learning and Systems, 2021

Machine Learning in Finance.
Proceedings of the KDD '21: The 27th ACM SIGKDD Conference on Knowledge Discovery and Data Mining, 2021

ODD: Outlier Detection and Description.
Proceedings of the KDD '21: The 27th ACM SIGKDD Conference on Knowledge Discovery and Data Mining, 2021

Fast Attributed Graph Embedding via Density of States.
Proceedings of the IEEE International Conference on Data Mining, 2021

Anomaly Mining: Past, Present and Future.
Proceedings of the CIKM '21: The 30th ACM International Conference on Information and Knowledge Management, Virtual Event, Queensland, Australia, November 1, 2021

GAWD: graph anomaly detection in weighted directed graph databases.
Proceedings of the ASONAM '21: International Conference on Advances in Social Networks Analysis and Mining, Virtual Event, The Netherlands, November 8, 2021

FairOD: Fairness-aware Outlier Detection.
Proceedings of the AIES '21: AAAI/ACM Conference on AI, 2021

2020
End-to-End Continual Rare-Class Recognition with Emerging Novel Subclasses.
ACM Trans. Knowl. Discov. Data, 2020

Anomaly Detection in Large Labeled Multi-Graph Databases.
CoRR, 2020

Automating Outlier Detection via Meta-Learning.
CoRR, 2020

Connecting Graph Convolutional Networks and Graph-Regularized PCA.
CoRR, 2020

Generalizing Graph Neural Networks Beyond Homophily.
CoRR, 2020

SUOD: A Scalable Unsupervised Outlier Detection Framework.
CoRR, 2020

Beyond Homophily in Graph Neural Networks: Current Limitations and Effective Designs.
Proceedings of the Advances in Neural Information Processing Systems 33: Annual Conference on Neural Information Processing Systems 2020, 2020

PairNorm: Tackling Oversmoothing in GNNs.
Proceedings of the 8th International Conference on Learning Representations, 2020

AutoAudit: Mining Accounting and Time-Evolving Graphs.
Proceedings of the 2020 IEEE International Conference on Big Data (IEEE BigData 2020), 2020

2019
Coverage-based Outlier Explanation.
CoRR, 2019

ContraVis: Contrastive and Visual Topic Modeling for Comparing Document Collections.
Proceedings of the World Wide Web Conference, 2019

Learning On-the-Job to Re-rank Anomalies from Top-1 Feedback.
Proceedings of the 2019 SIAM International Conference on Data Mining, 2019

Bot Detection: Will Focusing on Recall Cause Overall Performance Deterioration?
Proceedings of the Social, Cultural, and Behavioral Modeling, 2019

Continual Rare-Class Recognition with Emerging Novel Subclasses.
Proceedings of the Machine Learning and Knowledge Discovery in Databases, 2019

Statistical Analysis of Nearest Neighbor Methods for Anomaly Detection.
Proceedings of the Advances in Neural Information Processing Systems 32: Annual Conference on Neural Information Processing Systems 2019, 2019

BuScope: Fusing Individual & Aggregated Mobility Behavior for.
Proceedings of the 17th Annual International Conference on Mobile Systems, 2019

2018
Discovering Communities and Anomalies in Attributed Graphs: Interactive Visual Exploration and Summarization.
ACM Trans. Knowl. Discov. Data, 2018

Explaining anomalies in groups with characterizing subspace rules.
Data Min. Knowl. Discov., 2018

Incorporating Privileged Information to Unsupervised Anomaly Detection.
Proceedings of the Machine Learning and Knowledge Discovery in Databases, 2018

ConOut: Contextual Outlier Detection with Multiple Contexts: Application to Ad Fraud.
Proceedings of the Machine Learning and Knowledge Discovery in Databases, 2018

Beyond Outlier Detection: LookOut for Pictorial Explanation.
Proceedings of the Machine Learning and Knowledge Discovery in Databases, 2018

Robust Semi-Supervised Learning on Multiple Networks with Noise.
Proceedings of the Advances in Knowledge Discovery and Data Mining, 2018

xStream: Outlier Detection in Feature-Evolving Data Streams.
Proceedings of the 24th ACM SIGKDD International Conference on Knowledge Discovery & Data Mining, 2018

A Quest for Structure: Jointly Learning the Graph Structure and Semi-Supervised Classification.
Proceedings of the 27th ACM International Conference on Information and Knowledge Management, 2018

ChangeDAR: Online Localized Change Detection for Sensor Data on a Graph.
Proceedings of the 27th ACM International Conference on Information and Knowledge Management, 2018

A Lens into Employee Peer Reviews Via Sentiment-Aspect Modeling.
Proceedings of the IEEE/ACM 2018 International Conference on Advances in Social Networks Analysis and Mining, 2018

2017
GOTCHA! Network-Based Fraud Detection for Social Security Fraud.
Manag. Sci., 2017

Automatic Detection of Online Recruitment Frauds: Characteristics, Methods, and a Public Dataset.
Future Internet, 2017

LookOut on Time-Evolving Graphs: Succinctly Explaining Anomalies from Any Detector.
CoRR, 2017

X-PACS: eXPlaining Anomalies by Characterizing Subspaces.
CoRR, 2017

Fast, Warped Graph Embedding: Unifying Framework and One-Click Algorithm.
CoRR, 2017

Ties That Bind: Characterizing Classes by Attributes and Social Ties.
Proceedings of the 26th International Conference on World Wide Web Companion, 2017

Ranking in Heterogeneous Networks with Geo-Location Information.
Proceedings of the 2017 SIAM International Conference on Data Mining, 2017

A Domain-Agnostic Approach to Spam-URL Detection via Redirects.
Proceedings of the Advances in Knowledge Discovery and Data Mining, 2017

RUSH!: Targeted Time-limited Coupons via Purchase Forecasts.
Proceedings of the 23rd ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, Halifax, NS, Canada, August 13, 2017

Online Detection of Anomalous Heterogeneous Graphs with Streaming Edges.
Proceedings of the 2017 IEEE International Conference on Data Mining Workshops, 2017

2016
EIC Editorial.
IEEE Trans. Knowl. Data Eng., 2016

Less is More: Building Selective Anomaly Ensembles.
ACM Trans. Knowl. Discov. Data, 2016

Optimizing network robustness by edge rewiring: a general framework.
Data Min. Knowl. Discov., 2016

Fast Memory-efficient Anomaly Detection in Streaming Heterogeneous Graphs.
CoRR, 2016

The Politics of Routing: Investigating the Relationship between AS Connectivity and Internet Freedom.
Proceedings of the 6th USENIX Workshop on Free and Open Communications on the Internet, 2016

Collective Opinion Spam Detection using Active Inference.
Proceedings of the 2016 SIAM International Conference on Data Mining, 2016

Scalable Anomaly Ranking of Attributed Neighborhoods.
Proceedings of the 2016 SIAM International Conference on Data Mining, 2016

BIRDNEST: Bayesian Inference for Ratings-Fraud Detection.
Proceedings of the 2016 SIAM International Conference on Data Mining, 2016

Fast Memory-efficient Anomaly Detection in Streaming Heterogeneous Graphs.
Proceedings of the 22nd ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, 2016

Temporal Opinion Spam Detection by Multivariate Indicative Signals.
Proceedings of the Tenth International Conference on Web and Social Media, 2016

EdgeCentric: Anomaly Detection in Edge-Attributed Networks.
Proceedings of the IEEE International Conference on Data Mining Workshops, 2016

Sequential Ensemble Learning for Outlier Detection: A Bias-Variance Perspective.
Proceedings of the IEEE 16th International Conference on Data Mining, 2016

ACM DAVA'16: 2nd International Workshop on DAta mining meets Visual Analytics at Big Data Era.
Proceedings of the 25th ACM International Conference on Information and Knowledge Management, 2016

2015
Effects of tag usage on question response time - Analysis and prediction in StackOverflow.
Soc. Netw. Anal. Min., 2015

Detecting high-quality posts in community question answering sites.
Inf. Sci., 2015

APATE: A novel approach for automated credit card transaction fraud detection using network-based extensions.
Decis. Support Syst., 2015

Graph based anomaly detection and description: a survey.
Data Min. Knowl. Discov., 2015

Robust Semi-Supervised Classification for Multi-Relational Graphs.
CoRR, 2015

Correlation of Node Importance Measures: An Empirical Study through Graph Robustness.
Proceedings of the 24th International Conference on World Wide Web Companion, 2015

Less is More: Building Selective Anomaly Ensembles with Application to Event Detection in Temporal Graphs.
Proceedings of the 2015 SIAM International Conference on Data Mining, Vancouver, BC, Canada, April 30, 2015

Where Graph Topology Matters: The Robust Subgraph Problem.
Proceedings of the 2015 SIAM International Conference on Data Mining, Vancouver, BC, Canada, April 30, 2015

Discovering Opinion Spammer Groups by Network Footprints.
Proceedings of the Machine Learning and Knowledge Discovery in Databases, 2015

Collective Opinion Spam Detection: Bridging Review Networks and Metadata.
Proceedings of the 21th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, 2015

Graph-Based User Behavior Modeling: From Prediction to Fraud Detection.
Proceedings of the 21th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, 2015

Guilt-by-Constellation: Fraud Detection by Suspicious Clique Memberships.
Proceedings of the 48th Hawaii International Conference on System Sciences, 2015

Fraud Detection through Graph-Based User Behavior Modeling.
Proceedings of the 22nd ACM SIGSAC Conference on Computer and Communications Security, 2015

AFRAID: Fraud Detection via Active Inference in Time-evolving Social Networks.
Proceedings of the 2015 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining, 2015

2014
User churn in focused question answering sites: characterizations and prediction.
Proceedings of the 23rd International World Wide Web Conference, 2014

Big graph mining for the web and social media: algorithms, anomaly detection, and applications.
Proceedings of the Seventh ACM International Conference on Web Search and Data Mining, 2014

Make It or Break It: Manipulating Robustness in Large Networks.
Proceedings of the 2014 SIAM International Conference on Data Mining, 2014

Fast Nearest Neighbor Search on Large Time-Evolving Graphs.
Proceedings of the Machine Learning and Knowledge Discovery in Databases, 2014

Focused clustering and outlier detection in large attributed graphs.
Proceedings of the 20th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, 2014

Quantifying Political Polarity Based on Bipartite Opinion Networks.
Proceedings of the Eighth International Conference on Weblogs and Social Media, 2014

Joint voting prediction for questions and answers in CQA.
Proceedings of the 2014 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining, 2014

Min(e)d your tags: Analysis of Question response time in StackOverflow.
Proceedings of the 2014 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining, 2014

Fast Information-Theoretic Agglomerative Co-clustering.
Proceedings of the Databases Theory and Applications, 2014

ConnotationWordNet: Learning Connotation over the Word+Sense Network.
Proceedings of the 52nd Annual Meeting of the Association for Computational Linguistics, 2014

2013
Want a Good Answer? Ask a Good Question First!
CoRR, 2013

Anomaly, event, and fraud detection in large network datasets.
Proceedings of the Sixth ACM International Conference on Web Search and Data Mining, 2013

Mining Connection Pathways for Marked Nodes in Large Graphs.
Proceedings of the 13th SIAM International Conference on Data Mining, 2013

Opinion Fraud Detection in Online Reviews by Network Effects.
Proceedings of the Seventh International Conference on Weblogs and Social Media, 2013

External Evaluation of Topic Models: A Graph Mining Approach.
Proceedings of the 2013 IEEE 13th International Conference on Data Mining, 2013

Do more views of a graph help? Community detection and clustering in multi-graphs.
Proceedings of the 16th International Conference on Information Fusion, 2013

Sex Differences in the Human Connectome.
Proceedings of the Brain and Health Informatics - International Conference, 2013

2012
OPAvion: mining and visualization in large graphs.
Proceedings of the ACM SIGMOD International Conference on Management of Data, 2012

PICS: Parameter-free Identification of Cohesive Subgroups in Large Attributed Graphs.
Proceedings of the Twelfth SIAM International Conference on Data Mining, 2012

Quantifying Reciprocity in Large Weighted Communication Networks.
Proceedings of the Advances in Knowledge Discovery and Data Mining, 2012

RolX: structural role extraction & mining in large graphs.
Proceedings of the 18th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, 2012

TourViz: interactive visualization of connection pathways in large graphs.
Proceedings of the 18th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, 2012

Fast and reliable anomaly detection in categorical data.
Proceedings of the 21st ACM International Conference on Information and Knowledge Management, 2012

Interactively and Visually Exploring Tours of Marked Nodes in Large Graphs.
Proceedings of the International Conference on Advances in Social Networks Analysis and Mining, 2012

2011
It's who you know: graph mining using recursive structural features.
Proceedings of the 17th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, 2011

Statistical Properties of Social Networks.
Proceedings of the Social Network Data Analytics, 2011

2010
Surprising Patterns for the Call Duration Distribution of Mobile Phone Users.
Proceedings of the Machine Learning and Knowledge Discovery in Databases, 2010

oddball: Spotting Anomalies in Weighted Graphs.
Proceedings of the Advances in Knowledge Discovery and Data Mining, 2010

Structure, tie persistence and event detection in large phone and SMS networks.
Proceedings of the Eighth Workshop on Mining and Learning with Graphs, 2010

Metric forensics: a multi-level approach for mining volatile graphs.
Proceedings of the 16th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, 2010

Patterns on the Connected Components of Terabyte-Scale Graphs.
Proceedings of the ICDM 2010, 2010

ValuePick: Towards a Value-Oriented Dual-Goal Recommender System.
Proceedings of the ICDMW 2010, 2010

2009
RTG: a recursive realistic graph generator using random typing.
Data Min. Knowl. Discov., 2009

Large human communication networks: patterns and a utility-driven generator.
Proceedings of the 15th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, Paris, France, June 28, 2009

2008
Weighted graphs and disconnected components: patterns and a generator.
Proceedings of the 14th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, 2008

RTM: Laws and a Recursive Generator for Weighted Time-Evolving Graphs.
Proceedings of the 8th IEEE International Conference on Data Mining (ICDM 2008), 2008


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