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David Semedo

4 accepted papers

2026

FineVAU: A Novel Human-Aligned Benchmark for Fine-Grained Video Anomaly Understanding

AAAI 2026technical

Video Anomaly Understanding (VAU) is a novel task focused on describing unusual occurrences in videos. Despite growing interest, the evaluation of VAU remains an open challenge. Existing benchmarks rely on n-gram-based metrics (e.g., BLEU, ROUGE-L) or LLM-based evaluation. The first fails to capture

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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

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…