Search Results for author: Byung Suk Lee

Found 11 papers, 3 papers with code

TransNAS-TSAD: Harnessing Transformers for Multi-Objective Neural Architecture Search in Time Series Anomaly Detection

1 code implementation29 Nov 2023 Ijaz Ul Haq, Byung Suk Lee, Donna M. Rizzo

The surge in real-time data collection across various industries has underscored the need for advanced anomaly detection in both univariate and multivariate time series data.

Anomaly Detection Computational Efficiency +4

Label-based Graph Augmentation with Metapath for Graph Anomaly Detection

2 code implementations21 Aug 2023 Hwan Kim, JungHoon Kim, Byung Suk Lee, Sungsu Lim

To further efficiently exploit context information from metapath-based anomaly subgraph, we present a new framework, Metapath-based Graph Anomaly Detection (MGAD), incorporating GCN layers in both the dual-encoders and decoders to efficiently propagate context information between abnormal and normal nodes.

Graph Anomaly Detection Semi-supervised Anomaly Detection +1

Fact-Checking Generative AI: Ontology-Driven Biological Graphs for Disease-Gene Link Verification

no code implementations7 Aug 2023 Ahmed Abdeen Hamed, Byung Suk Lee, Alessandro Crimi, Magdalena M. Misiak

Since the launch of various generative AI tools, scientists have been striving to evaluate their capabilities and contents, in the hope of establishing trust in their generative abilities.

Fact Checking Knowledge Graphs

Graph Anomaly Detection with Graph Neural Networks: Current Status and Challenges

no code implementations29 Sep 2022 Hwan Kim, Byung Suk Lee, Won-Yong Shin, Sungsu Lim

Graphs are used widely to model complex systems, and detecting anomalies in a graph is an important task in the analysis of complex systems.

Graph Anomaly Detection Graph Classification +2

Adaptive Model Pooling for Online Deep Anomaly Detection from a Complex Evolving Data Stream

1 code implementation9 Jun 2022 Susik Yoon, YoungJun Lee, Jae-Gil Lee, Byung Suk Lee

Online anomaly detection from a data stream is critical for the safety and security of many applications but is facing severe challenges due to complex and evolving data streams from IoT devices and cloud-based infrastructures.

Anomaly Detection

Coherence-based Label Propagation over Time Series for Accelerated Active Learning

no code implementations ICLR 2022 Yooju Shin, Susik Yoon, Sundong Kim, Hwanjun Song, Jae-Gil Lee, Byung Suk Lee

Time-series data are ubiquitous these days, but lack of the labels in time-series data is regarded as a hurdle for its broad applicability.

Active Learning Time Series +1

SOMTimeS: Self Organizing Maps for Time Series Clustering and its Application to Serious Illness Conversations

no code implementations26 Aug 2021 Ali Javed, Donna M. Rizzo, Byung Suk Lee, Robert Gramling

We showed that for similar accuracy, the speed-up achieved for SOMTimeS and K-means was 1. 8x on average; however, rates varied between 1x and 18x depending on the dataset.

Clustering Dynamic Time Warping +2

A Benchmark Study on Time Series Clustering

no code implementations20 Apr 2020 Ali Javed, Byung Suk Lee, Dona M. Rizzo

This paper presents the first time series clustering benchmark utilizing all time series datasets currently available in the University of California Riverside (UCR) archive -- the state of the art repository of time series data.

Clustering Dynamic Time Warping +2

Analysis of Hydrological and Suspended Sediment Events from Mad River Watershed using Multivariate Time Series Clustering

no code implementations28 Nov 2019 Ali Javed, Scott D. Hamshaw, Donna M. Rizzo, Byung Suk Lee

Additionally, using available meteorological data associated with storm events, we examine the characteristics of computational clusters of storm events in the study watersheds and identify the features driving the clustering approach.

Clustering Time Series +1

Real-time Top-K Predictive Query Processing over Event Streams

no code implementations26 Aug 2015 Saurav Acharya, Byung Suk Lee, Paul Hines

We overcome these limitations by proposing a novel event precedence model and a run-time causal inference mechanism.

Causal Inference

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