Search Results for author: Leandros Tassiulas

Found 25 papers, 8 papers with code

Adaptive Heterogeneous Client Sampling for Federated Learning over Wireless Networks

1 code implementation22 Apr 2024 Bing Luo, Wenli Xiao, Shiqiang Wang, Jianwei Huang, Leandros Tassiulas

This paper aims to design an adaptive client sampling algorithm for FL over wireless networks that tackles both system and statistical heterogeneity to minimize the wall-clock convergence time.

Federated Learning

Predictive Handover Strategy in 6G and Beyond: A Deep and Transfer Learning Approach

no code implementations11 Apr 2024 Ioannis Panitsas, Akrit Mudvari, Ali Maatouk, Leandros Tassiulas

Next-generation cellular networks will evolve into more complex and virtualized systems, employing machine learning for enhanced optimization and leveraging higher frequency bands and denser deployments to meet varied service demands.

Transfer Learning

From Similarity to Superiority: Channel Clustering for Time Series Forecasting

no code implementations31 Mar 2024 Jialin Chen, Jan Eric Lenssen, Aosong Feng, Weihua Hu, Matthias Fey, Leandros Tassiulas, Jure Leskovec, Rex Ying

Motivated by our observation of a correlation between the time series model's performance boost against channel mixing and the intrinsic similarity on a pair of channels, we developed a novel and adaptable Channel Clustering Module (CCM).

Clustering Time Series +1

Machine Learning on Blockchain Data: A Systematic Mapping Study

no code implementations25 Mar 2024 Georgios Palaiokrassas, Sarah Bouraga, Leandros Tassiulas

Conclusion: The results confirm that ML applied to blockchain data is a relevant and a growing topic of interest both in the literature and in practice.

An Item is Worth a Prompt: Versatile Image Editing with Disentangled Control

1 code implementation7 Mar 2024 Aosong Feng, Weikang Qiu, Jinbin Bai, Kaicheng Zhou, Zhen Dong, Xiao Zhang, Rex Ying, Leandros Tassiulas

Building on the success of text-to-image diffusion models (DPMs), image editing is an important application to enable human interaction with AI-generated content.

Descriptive

Efficient High-Resolution Time Series Classification via Attention Kronecker Decomposition

no code implementations7 Mar 2024 Aosong Feng, Jialin Chen, Juan Garza, Brooklyn Berry, Francisco Salazar, Yifeng Gao, Rex Ying, Leandros Tassiulas

The high-resolution time series classification problem is essential due to the increasing availability of detailed temporal data in various domains.

Time Series Time Series Classification

Constrained Reinforcement Learning for Adaptive Controller Synchronization in Distributed SDN

no code implementations21 Jan 2024 Ioannis Panitsas, Akrit Mudvari, Leandros Tassiulas

In software-defined networking (SDN), the implementation of distributed SDN controllers, with each controller responsible for managing a specific sub-network or domain, plays a critical role in achieving a balance between centralized control, scalability, reliability, and network efficiency.

reinforcement-learning Reinforcement Learning (RL)

Adaptive Compression-Aware Split Learning and Inference for Enhanced Network Efficiency

no code implementations9 Nov 2023 Akrit Mudvari, Antero Vainio, Iason Ofeidis, Sasu Tarkoma, Leandros Tassiulas

In this work, we develop an adaptive compression-aware split learning method ('deprune') to improve and train deep learning models so that they are much more network-efficient, which would make them ideal to deploy in weaker devices with the help of edge-cloud resources.

Federated Learning Transfer Learning

Mobility as a Resource (MaaR) for resilient human-centric automation: a vision paper

no code implementations5 Nov 2023 S. Travis Waller, Amalia Polydoropoulou, Leandros Tassiulas, Athanasios Ziliaskopoulos, Sisi Jian, Susann Wagenknecht, Georg Hirte, Satish Ukkusuri, Gitakrishnan Ramadurai, Tomasz Bednarz

However, as observed in other fields (e. g. cloud computing resource management) we argue that mobility will evolve from a service to a resource (i. e., Mobility as a Resource, MaaR).

Cloud Computing Management

Leveraging Machine Learning for Multichain DeFi Fraud Detection

no code implementations17 May 2023 Georgios Palaiokrassas, Sandro Scherrers, Iason Ofeidis, Leandros Tassiulas

Since the inception of permissionless blockchains with Bitcoin in 2008, it became apparent that their most well-suited use case is related to making the financial system and its advantages available to everyone seamlessly without depending on any trusted intermediaries.

Fraud Detection

Incentive Mechanism Design for Unbiased Federated Learning with Randomized Client Participation

no code implementations17 Apr 2023 Bing Luo, Yutong Feng, Shiqiang Wang, Jianwei Huang, Leandros Tassiulas

Incentive mechanism is crucial for federated learning (FL) when rational clients do not have the same interests in the global model as the server.

Federated Learning

Monetary Policy, Digital Assets, and DeFi Activity

no code implementations20 Feb 2023 Antzelos Kyriazis, Iason Ofeidis, Georgios Palaiokrassas, Leandros Tassiulas

We also show that some borrowing interest rates in the Ethereum DeFi ecosystem are affected positively by unexpected changes in monetary policy.

Robust and Resource-efficient Machine Learning Aided Viewport Prediction in Virtual Reality

no code implementations20 Dec 2022 Yuang Jiang, Konstantinos Poularakis, Diego Kiedanski, Sastry Kompella, Leandros Tassiulas

In this work, we propose a novel meta learning based viewport prediction paradigm to alleviate the worst prediction performance and ensure the robustness of viewport prediction.

Meta-Learning

Deep Reinforcement Learning-based Rebalancing Policies for Profit Maximization of Relay Nodes in Payment Channel Networks

1 code implementation13 Oct 2022 Nikolaos Papadis, Leandros Tassiulas

Payment channel networks (PCNs) are a layer-2 blockchain scalability solution, with its main entity, the payment channel, enabling transactions between pairs of nodes "off-chain," thus reducing the burden on the layer-1 network.

An Overview of the Data-Loader Landscape: Comparative Performance Analysis

no code implementations27 Sep 2022 Iason Ofeidis, Diego Kiedanski, Leandros Tassiulas

Dataloaders, in charge of moving data from storage into GPUs while training machine learning models, might hold the key to drastically improving the performance of training jobs.

Adaptive Graph Spatial-Temporal Transformer Network for Traffic Flow Forecasting

1 code implementation9 Jul 2022 Aosong Feng, Leandros Tassiulas

Traffic flow forecasting on graphs has real-world applications in many fields, such as transportation system and computer networks.

Debt-Financed Collateral and Stability Risks in the DeFi Ecosystem

1 code implementation23 Apr 2022 Michael Darlin, Georgios Palaiokrassas, Leandros Tassiulas

The rise of Decentralized Finance ("DeFi") on the Ethereum blockchain has enabled the creation of lending platforms, which serve as marketplaces to lend and borrow digital currencies.

KerGNNs: Interpretable Graph Neural Networks with Graph Kernels

1 code implementation3 Jan 2022 Aosong Feng, Chenyu You, Shiqiang Wang, Leandros Tassiulas

We also show that the trained graph filters in KerGNNs can reveal the local graph structures of the dataset, which significantly improves the model interpretability compared with conventional GNN models.

Graph Classification

Tackling System and Statistical Heterogeneity for Federated Learning with Adaptive Client Sampling

no code implementations21 Dec 2021 Bing Luo, Wenli Xiao, Shiqiang Wang, Jianwei Huang, Leandros Tassiulas

This paper aims to design an adaptive client sampling algorithm that tackles both system and statistical heterogeneity to minimize the wall-clock convergence time.

Federated Learning

Cost-Effective Federated Learning in Mobile Edge Networks

no code implementations12 Sep 2021 Bing Luo, Xiang Li, Shiqiang Wang, Jianwei Huang, Leandros Tassiulas

Federated learning (FL) is a distributed learning paradigm that enables a large number of mobile devices to collaboratively learn a model under the coordination of a central server without sharing their raw data.

Federated Learning

Federated Learning with Spiking Neural Networks

1 code implementation11 Jun 2021 Yeshwanth Venkatesha, Youngeun Kim, Leandros Tassiulas, Priyadarshini Panda

To validate the proposed federated learning framework, we experimentally evaluate the advantages of SNNs on various aspects of federated learning with CIFAR10 and CIFAR100 benchmarks.

Federated Learning Privacy Preserving

State-Dependent Processing in Payment Channel Networks for Throughput Optimization

no code implementations31 Mar 2021 Nikolaos Papadis, Leandros Tassiulas

Payment channel networks (PCNs) have emerged as a scalability solution for blockchains built on the concept of a payment channel: a setting that allows two nodes to safely transact between themselves in high frequencies based on pre-committed peer-to-peer balances.

Scheduling

Cost-Effective Federated Learning Design

no code implementations15 Dec 2020 Bing Luo, Xiang Li, Shiqiang Wang, Jianwei Huang, Leandros Tassiulas

In this paper, we analyze how to design adaptive FL that optimally chooses these essential control variables to minimize the total cost while ensuring convergence.

Federated Learning

Optimal Bidding Strategy for Maker Auctions

no code implementations15 Sep 2020 Michael Darlin, Nikolaos Papadis, Leandros Tassiulas

The Maker Protocol is a decentralized finance application that enables collateralized lending.

Model Pruning Enables Efficient Federated Learning on Edge Devices

2 code implementations26 Sep 2019 Yuang Jiang, Shiqiang Wang, Victor Valls, Bong Jun Ko, Wei-Han Lee, Kin K. Leung, Leandros Tassiulas

To overcome this challenge, we propose PruneFL -- a novel FL approach with adaptive and distributed parameter pruning, which adapts the model size during FL to reduce both communication and computation overhead and minimize the overall training time, while maintaining a similar accuracy as the original model.

Federated Learning

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