Search Results for author: Yulia R. Gel

Found 23 papers, 11 papers with code

Time-Aware Knowledge Representations of Dynamic Objects with Multidimensional Persistence

no code implementations24 Jan 2024 Baris Coskunuzer, Ignacio Segovia-Dominguez, Yuzhou Chen, Yulia R. Gel

In particular, we propose a new approach, named \textit{Temporal MultiPersistence} (TMP), which produces multidimensional topological fingerprints of the data by using the existing single parameter topological summaries.

Computational Efficiency Decision Making +1

Topological Pooling on Graphs

1 code implementation25 Mar 2023 Yuzhou Chen, Yulia R. Gel

By invoking the machinery of persistent homology and the concept of landmarks, we propose a novel topological pooling layer and witness complex-based topological embedding mechanism that allow us to systematically integrate hidden topological information at both local and global levels.

Anomaly Detection Graph Classification +2

Reduction Algorithms for Persistence Diagrams of Networks: CoralTDA and PrunIT

1 code implementation24 Nov 2022 Cuneyt Gurcan Akcora, Murat Kantarcioglu, Yulia R. Gel, Baris Coskunuzer

Second, we introduce a pruning algorithm for graphs to compute their persistence diagrams by removing the dominated vertices.

Topological Data Analysis

Evaluating Distribution System Reliability with Hyperstructures Graph Convolutional Nets

no code implementations14 Nov 2022 Yuzhou Chen, Tian Jiang, Miguel Heleno, Alexandre Moreira, Yulia R. Gel

Nowadays, it is broadly recognized in the power system community that to meet the ever expanding energy sector's needs, it is no longer possible to rely solely on physics-based models and that reliable, timely and sustainable operation of energy systems is impossible without systematic integration of artificial intelligence (AI) tools.

Computational Efficiency Representation Learning

BScNets: Block Simplicial Complex Neural Networks

1 code implementation13 Dec 2021 Yuzhou Chen, Yulia R. Gel, H. Vincent Poor

Simplicial neural networks (SNN) have recently emerged as the newest direction in graph learning which expands the idea of convolutional architectures from node space to simplicial complexes on graphs.

Graph Learning Link Prediction

Topological Relational Learning on Graphs

1 code implementation NeurIPS 2021 Yuzhou Chen, Baris Coskunuzer, Yulia R. Gel

As a result, the new framework enables us to harness both the conventional information on the graph structure and information on the graph higher order topological properties.

Graph Classification Node Classification +2

Using NASA Satellite Data Sources and Geometric Deep Learning to Uncover Hidden Patterns in COVID-19 Clinical Severity

no code implementations21 Oct 2021 Ignacio Segovia-Dominguez, Huikyo Lee, Zhiwei Zhen, Yuzhou Chen, Michael Garay, Daniel Crichton, Rishabh Wagh, Yulia R. Gel

As multiple adverse events in 2021 illustrated, virtually all aspects of our societal functioning -- from water and food security to energy supply to healthcare -- more than ever depend on the dynamics of environmental factors.

Z-GCNETs: Time Zigzags at Graph Convolutional Networks for Time Series Forecasting

1 code implementation10 May 2021 Yuzhou Chen, Ignacio Segovia-Dominguez, Yulia R. Gel

There recently has been a surge of interest in developing a new class of deep learning (DL) architectures that integrate an explicit time dimension as a fundamental building block of learning and representation mechanisms.

Time Series Time Series Forecasting

Smart Vectorizations for Single and Multiparameter Persistence

1 code implementation10 Apr 2021 Baris Coskunuzer, Cuneyt Gurcan Akcora, Ignacio Segovia Dominguez, Zhiwei Zhen, Murat Kantarcioglu, Yulia R. Gel

We derive theoretical guarantees on the stability of the new saw and multi-persistence grid functions and illustrate their applicability for graph classification tasks.

Anomaly Detection Graph Classification +1

Ensemble Forecasting of the Zika Space-TimeSpread with Topological Data Analysis

no code implementations24 Sep 2020 Marwah Soliman, Vyacheslav Lyubchich, Yulia R. Gel

As per the records of theWorld Health Organization, the first formally reported incidence of Zika virus occurred in Brazil in May 2015.

Topological Data Analysis

LFGCN: Levitating over Graphs with Levy Flights

no code implementations4 Sep 2020 Yuzhou Chen, Yulia R. Gel, Konstantin Avrachenkov

Due to high utility in many applications, from social networks to blockchain to power grids, deep learning on non-Euclidean objects such as graphs and manifolds, coined Geometric Deep Learning (GDL), continues to gain an ever increasing interest.

Node Classification

Dissecting Ethereum Blockchain Analytics: What We Learn from Topology and Geometry of Ethereum Graph

1 code implementation20 Dec 2019 Yitao Li, Umar Islambekov, Cuneyt Akcora, Ekaterina Smirnova, Yulia R. Gel, Murat Kantarcioglu

Blockchain technology and, in particular, blockchain-based cryptocurrencies offer us information that has never been seen before in the financial world.

Topological Data Analysis

Harnessing the power of Topological Data Analysis to detect change points in time series

1 code implementation28 Oct 2019 Umar Islambekov, Monisha Yuvaraj, Yulia R. Gel

While the applications of topological data analysis to change point detection are potentially very broad, in this paper we primarily focus on integrating topological concepts with the existing nonparametric methods for change point detection.

Change Point Detection Time Series +2

Fractional Graph Convolutional Networks (FGCN) for Semi-Supervised Learning

no code implementations25 Sep 2019 Yuzhou Chen, Yulia R. Gel, Konstantin Avrachenkov

Due to high utility in many applications, from social networks to blockchain to power grids, deep learning on non-Euclidean objects such as graphs and manifolds continues to gain an ever increasing interest.

ChainNet: Learning on Blockchain Graphs with Topological Features

no code implementations18 Aug 2019 Nazmiye Ceren Abay, Cuneyt Gurcan Akcora, Yulia R. Gel, Umar D. Islambekov, Murat Kantarcioglu, Yahui Tian, Bhavani Thuraisingham

With emergence of blockchain technologies and the associated cryptocurrencies, such as Bitcoin, understanding network dynamics behind Blockchain graphs has become a rapidly evolving research direction.

Graph Representation Learning

BitcoinHeist: Topological Data Analysis for Ransomware Detection on the Bitcoin Blockchain

no code implementations19 Jun 2019 Cuneyt Gurcan Akcora, Yitao Li, Yulia R. Gel, Murat Kantarcioglu

To our knowledge, none of the previous approaches have employed advanced data analytics techniques to automatically detect ransomware related transactions and malicious Bitcoin addresses.

Topological Data Analysis Cryptography and Security Distributed, Parallel, and Cluster Computing

CRAD: Clustering with Robust Autocuts and Depth

1 code implementation8 Apr 2019 Xin Huang, Yulia R. Gel

We develop a new density-based clustering algorithm named CRAD which is based on a new neighbor searching function with a robust data depth as the dissimilarity measure.

Clustering Time Series +1

Blockchain: A Graph Primer

2 code implementations10 Aug 2017 Cuneyt Gurcan Akcora, Yulia R. Gel, Murat Kantarcioglu

Our goal is to provide a concise but complete description of blockchain technology that is accessible to readers with no prior expertise in the field.

Computers and Society

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