Search Results for author: Konstantinos Psounis

Found 7 papers, 1 papers with code

Efficient Toxic Content Detection by Bootstrapping and Distilling Large Language Models

no code implementations13 Dec 2023 Jiang Zhang, Qiong Wu, Yiming Xu, Cheng Cao, Zheng Du, Konstantinos Psounis

Furthermore, student LMs fine-tuned with rationales extracted via DToT outperform baselines on all datasets with up to 16. 9\% accuracy improvement, while being more than 60x smaller than conventional LLMs.

In-Context Learning

FireFly A Synthetic Dataset for Ember Detection in Wildfire

1 code implementation6 Aug 2023 Yue Hu, Xinan Ye, Yifei Liu, Souvik Kundu, Gourav Datta, Srikar Mutnuri, Namo Asavisanu, Nora Ayanian, Konstantinos Psounis, Peter Beerel

This paper presents "FireFly", a synthetic dataset for ember detection created using Unreal Engine 4 (UE4), designed to overcome the current lack of ember-specific training resources.

object-detection Object Detection

How Much Privacy Does Federated Learning with Secure Aggregation Guarantee?

no code implementations3 Aug 2022 Ahmed Roushdy Elkordy, Jiang Zhang, Yahya H. Ezzeldin, Konstantinos Psounis, Salman Avestimehr

While SA ensures no additional information is leaked about the individual model update beyond the aggregated model update, there are no formal guarantees on how much privacy FL with SA can actually offer; as information about the individual dataset can still potentially leak through the aggregated model computed at the server.

Federated Learning Privacy Preserving

A Unified Prediction Framework for Signal Maps

no code implementations8 Feb 2022 Emmanouil Alimpertis, Athina Markopoulou, Carter T. Butts, Evita Bakopoulou, Konstantinos Psounis

This improves prediction (e. g., from 64% to 94% in recall for coverage loss) by removing points with negative values, and can also enable data minimization.

Privacy-Utility Trades in Crowdsourced Signal Map Obfuscation

no code implementations13 Jan 2022 Jiang Zhang, Lillian Clark, Matthew Clark, Konstantinos Psounis, Peter Kairouz

Cellular providers and data aggregating companies crowdsource celluar signal strength measurements from user devices to generate signal maps, which can be used to improve network performance.

Location Leakage in Federated Signal Maps

no code implementations7 Dec 2021 Evita Bakopoulou, Mengwei Yang, Jiang Zhang, Konstantinos Psounis, Athina Markopoulou

We consider the problem of predicting cellular network performance (signal maps) from measurements collected by several mobile devices.

Federated Learning

HARPO: Learning to Subvert Online Behavioral Advertising

no code implementations9 Nov 2021 Jiang Zhang, Konstantinos Psounis, Muhammad Haroon, Zubair Shafiq

Online behavioral advertising, and the associated tracking paraphernalia, poses a real privacy threat.

Reinforcement Learning (RL)

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