Search Results for author: Ignacio Castro

Found 11 papers, 4 papers with code

Multi-MLLM Knowledge Distillation for Out-of-Context News Detection

no code implementations28 May 2025 Yimeng Gu, Zhao Tong, Ignacio Castro, Shu Wu, Gareth Tyson

In contrast, we aim to improve the performance of small MLLMs in a more label-efficient and cost-effective manner.

Knowledge Distillation Misinformation

Collaborative Content Moderation in the Fediverse

no code implementations10 Jan 2025 Haris Bin Zia, Aravindh Raman, Ignacio Castro, Gareth Tyson

The Fediverse, a group of interconnected servers providing a variety of interoperable services (e. g. micro-blogging in Mastodon) has gained rapid popularity.

Federated Learning

Efficient Solutions For An Intriguing Failure of LLMs: Long Context Window Does Not Mean LLMs Can Analyze Long Sequences Flawlessly

no code implementations3 Aug 2024 Peyman Hosseini, Ignacio Castro, Iacopo Ghinassi, Matthew Purver

Large Language Models (LLMs) have demonstrated remarkable capabilities in comprehending and analyzing lengthy sequential inputs, owing to their extensive context windows that allow processing millions of tokens in a single forward pass.

Sentiment Analysis

How Similar Are Elected Politicians and Their Constituents? Quantitative Evidence From Online Social Networks

no code implementations3 Jul 2024 Waleed Iqbal, Gareth Tyson, Ignacio Castro

We find that elected politicians tend to be equally similar to their constituents in terms of content and style regardless of whether a constituency elects a right or left-wing politician.

Learning Domain-Invariant Features for Out-of-Context News Detection

no code implementations11 Jun 2024 Yimeng Gu, Mengqi Zhang, Ignacio Castro, Shu Wu, Gareth Tyson

In order to effectively adapt the detection model to unlabeled news topics or agencies, we propose ConDA-TTA (Contrastive Domain Adaptation with Test-Time Adaptation) which applies contrastive learning and maximum mean discrepancy (MMD) to learn domain-invariant features.

Contrastive Learning Misinformation +1

Decentralised Moderation for Interoperable Social Networks: A Conversation-based Approach for Pleroma and the Fediverse

1 code implementation3 Apr 2024 Vibhor Agarwal, Aravindh Raman, Nishanth Sastry, Ahmed M. Abdelmoniem, Gareth Tyson, Ignacio Castro

Recent work has exploited the conversational context of a post to improve this automatic tagging, e. g. using the replies to a post to help classify if it contains toxic speech.

TAG

Lady and the Tramp Nextdoor: Online Manifestations of Economic Inequalities in the Nextdoor Social Network

no code implementations11 Apr 2023 Waleed Iqbal, Vahid Ghafouri, Gareth Tyson, Guillermo Suarez-Tangil, Ignacio Castro

We collect 2. 6 Million posts from 64, 283 neighborhoods in the United States and 3, 325 neighborhoods in the United Kingdom, to examine whether online discourse reflects the income and income inequality of a neighborhood.

Lon-ea at SemEval-2023 Task 11: A Comparison of Activation Functions for Soft and Hard Label Prediction

1 code implementation4 Mar 2023 Peyman Hosseini, Mehran Hosseini, Sana Sabah Al-Azzawi, Marcus Liwicki, Ignacio Castro, Matthew Purver

We study the influence of different activation functions in the output layer of deep neural network models for soft and hard label prediction in the learning with disagreement task.

Active Delay Measurement for SDN-based Networks

no code implementations24 Dec 2020 Mohammad Mahdi Tajiki, Seyed Hesamedin Ghasemi Petroudi, Stefano Salsano, Steve Uhlig, Ignacio Castro

In this respect, the challenging issue is to select a proper combination of flows such that by knowing their delay it is possible to solve a set of a linear equation and obtain a unique LDV.

Networking and Internet Architecture

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