Search Results for author: Ismini Lourentzou

Found 16 papers, 8 papers with code

uaMix-MAE: Efficient Tuning of Pretrained Audio Transformers with Unsupervised Audio Mixtures

1 code implementation14 Mar 2024 Afrina Tabassum, Dung Tran, Trung Dang, Ismini Lourentzou, Kazuhito Koishida

Masked Autoencoders (MAEs) learn rich low-level representations from unlabeled data but require substantial labeled data to effectively adapt to downstream tasks.

Commonsense for Zero-Shot Natural Language Video Localization

no code implementations29 Dec 2023 Meghana Holla, Ismini Lourentzou

Zero-shot Natural Language-Video Localization (NLVL) methods have exhibited promising results in training NLVL models exclusively with raw video data by dynamically generating video segments and pseudo-query annotations.

Sedition Hunters: A Quantitative Study of the Crowdsourced Investigation into the 2021 U.S. Capitol Attack

no code implementations21 Feb 2023 Tianjiao Yu, Sukrit Venkatagiri, Ismini Lourentzou, Kurt Luther

Social media platforms have enabled extremists to organize violent events, such as the 2021 U. S. Capitol Attack.

Learning by Asking for Embodied Visual Navigation and Task Completion

1 code implementation9 Feb 2023 Ying Shen, Ismini Lourentzou

The research community has shown increasing interest in designing intelligent embodied agents that can assist humans in accomplishing tasks.

Question Answering Visual Navigation

Rationalization for Explainable NLP: A Survey

no code implementations21 Jan 2023 Sai Gurrapu, Ajay Kulkarni, Lifu Huang, Ismini Lourentzou, Laura Freeman, Feras A. Batarseh

Recent improvements in natural language generation have made rationalization an attractive technique because it is intuitive, human-comprehensible, and accessible to non-technical users.

Explainable Artificial Intelligence (XAI) Question Answering +3

CheXRelNet: An Anatomy-Aware Model for Tracking Longitudinal Relationships between Chest X-Rays

1 code implementation8 Aug 2022 Gaurang Karwande, Amarachi Mbakawe, Joy T. Wu, Leo A. Celi, Mehdi Moradi, Ismini Lourentzou

Despite the progress in utilizing deep learning to automate chest radiograph interpretation and disease diagnosis tasks, change between sequential Chest X-rays (CXRs) has received limited attention.

Anatomy Change Detection +2

FixEval: Execution-based Evaluation of Program Fixes for Programming Problems

1 code implementation15 Jun 2022 Md Mahim Anjum Haque, Wasi Uddin Ahmad, Ismini Lourentzou, Chris Brown

To address this issue, we introduce FixEval, a benchmark comprising of buggy code submissions to competitive programming problems and their corresponding fixes.

Bug fixing

Hard Negative Sampling Strategies for Contrastive Representation Learning

no code implementations2 Jun 2022 Afrina Tabassum, Muntasir Wahed, Hoda Eldardiry, Ismini Lourentzou

One of the challenges in contrastive learning is the selection of appropriate \textit{hard negative} examples, in the absence of label information.

Contrastive Learning Representation Learning

SAUCE: Truncated Sparse Document Signature Bit-Vectors for Fast Web-Scale Corpus Expansion

no code implementations26 Aug 2021 Muntasir Wahed, Daniel Gruhl, Alfredo Alba, Anna Lisa Gentile, Petar Ristoski, Chad Deluca, Steve Welch, Ismini Lourentzou

In this paper, we consider the problem of fast approximate corpus expansion given a small seed corpus with a few relevant documents as a query, with the goal of capturing the long tail of a domain-specific set of concept terms.

Natural Language Understanding

Chest ImaGenome Dataset for Clinical Reasoning

1 code implementation31 Jul 2021 Joy T. Wu, Nkechinyere N. Agu, Ismini Lourentzou, Arjun Sharma, Joseph A. Paguio, Jasper S. Yao, Edward C. Dee, William Mitchell, Satyananda Kashyap, Andrea Giovannini, Leo A. Celi, Mehdi Moradi

Despite the progress in automatic detection of radiologic findings from chest X-ray (CXR) images in recent years, a quantitative evaluation of the explainability of these models is hampered by the lack of locally labeled datasets for different findings.

Anatomy

DeepQAMVS: Query-Aware Hierarchical Pointer Networks for Multi-Video Summarization

no code implementations13 May 2021 Safa Messaoud, Ismini Lourentzou, Assma Boughoula, Mona Zehni, Zhizhen Zhao, ChengXiang Zhai, Alexander G. Schwing

The recent growth of web video sharing platforms has increased the demand for systems that can efficiently browse, retrieve and summarize video content.

Video Summarization

Adapting Sequence to Sequence models for Text Normalization in Social Media

1 code implementation12 Apr 2019 Ismini Lourentzou, Kabir Manghnani, ChengXiang Zhai

Social media offer an abundant source of valuable raw data, however informal writing can quickly become a bottleneck for many natural language processing (NLP) tasks.

Lexical Normalization

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