Search Results for author: Dimitris Chatzopoulos

Found 6 papers, 4 papers with code

Workflow Optimization for Parallel Split Learning

1 code implementation1 Feb 2024 Joana Tirana, Dimitra Tsigkari, George Iosifidis, Dimitris Chatzopoulos

We propose a solution method based on the decomposition of the problem by leveraging its inherent symmetry, and a second one that is fully scalable.

Federated Learning Scheduling

MP-SL: Multihop Parallel Split Learning

1 code implementation31 Jan 2024 Joana Tirana, Spyros Lalis, Dimitris Chatzopoulos

Moreover, the task of training ML models with a vast number of parameters demands computing and memory resources beyond the capabilities of small devices, such as mobile and Internet of Things (IoT) devices.

Federated Learning

Lightweight Modeling of User Context Combining Physical and Virtual Sensor Data

no code implementations28 Jun 2023 Mattia Giovanni Campana, Dimitris Chatzopoulos, Franca Delmastro, Pan Hui

The framework has been used by 3 voluntary users for two weeks, generating a dataset with more than 36K samples and 1331 features.

Dimensionality Reduction

IPLS : A Framework for Decentralized Federated Learning

1 code implementation6 Jan 2021 Christodoulos Pappas, Dimitris Chatzopoulos, Spyros Lalis, Manolis Vavalis

The proliferation of resourceful mobile devices that store rich, multidimensional and privacy-sensitive user data motivate the design of federated learning (FL), a machine-learning (ML) paradigm that enables mobile devices to produce an ML model without sharing their data.

Federated Learning

SplitEasy: A Practical Approach for Training ML models on Mobile Devices

1 code implementation9 Nov 2020 Kamalesh Palanisamy, Vivek Khimani, Moin Hussain Moti, Dimitris Chatzopoulos

In this work, we highlight the theoretical and technical challenges that need to be resolved to develop a functional framework that trains ML models in mobile devices without transferring raw data to a server.

FaRM: Fair Reward Mechanism for Information Aggregation in Spontaneous Localized Settings (Extended Version)

no code implementations10 Jun 2019 Moin Hussain Moti, Dimitris Chatzopoulos, Pan Hui, Sujit Gujar

FaRM uses \textit{(i)} a \emph{report strength score} to remove the risk of random pairing with dishonest reporters, \textit{(ii)} a \emph{consistency score} to measure an agent's history of accurate reports and distinguish valuable reports, \textit{(iii)} a \emph{reliability score} to estimate the probability of an agent to collude with nearby agents and prevents agents from getting swayed, and \textit{(iv)} a \emph{location robustness score} to filter agents who try to participate without being present in the considered setting.

Fairness

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