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Joao Magalhaes

5 accepted papers

2025

Language Models Can be Efficiently Steered via Minimal Embedding Layer Transformations

EMNLP 2025

Large Language Models (LLMs) are increasingly costly to fine-tune due to their size, with embedding layers alone accounting for up to 20% of model parameters. While Parameter-Efficient Fine-Tuning (PEFT) methods exist, they largely overlook the embedding layer. In this paper, we introduce TinyTE, a

2024

Dwell in the Beginning: How Language Models Embed Long Documents for Dense Retrieval

ACL 2024short

This study investigates the existence of positional biases in Transformer-based language models for text representation learning, particularly in the context of web document retrieval. We build on previous research that demonstrated loss of information in the middle of input sequences for causal lan…

2024

Generating Coherent Sequences of Visual Illustrations for Real-World Manual Tasks

ACL 2024long

Multistep instructions, such as recipes and how-to guides, greatly benefit from visual aids, such as a series of images that accompany the instruction steps. While Large Language Models (LLMs) have become adept at generating coherent textual steps, Large Vision/Language Models (LVLMs) are less capab…

Cited by 4SourcePDFScholar
2024

Multi-trait User Simulation with Adaptive Decoding for Conversational Task Assistants

EMNLP 2024finding

Conversational systems must be robust to user interactions that naturally exhibit diverse conversational traits. Capturing and simulating these diverse traits coherently and efficiently presents a complex challenge. This paper introduces Multi-Trait Adaptive Decoding (mTAD), a method that generates…

2024

Show and Guide: Instructional-Plan Grounded Vision and Language Model

EMNLP 2024main

Guiding users through complex procedural plans is an inherently multimodal task in which having visually illustrated plan steps is crucial to deliver an effective plan guidance. However, existing works on plan-following language models (LMs) often are not capable of multimodal input and output. In t…