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Florian Matthes

16 accepted papers

2025

CarMem: Enhancing Long-Term Memory in LLM Voice Assistants through Category-Bounding

COLING 2025industry

In today’s assistant landscape, personalisation enhances interactions, fosters long-term relationships, and deepens engagement. However, many systems struggle with retaining user preferences, leading to repetitive user requests and disengagement. Furthermore, the unregulated and opaque extraction of…

2025

DA-Pred: Performance Prediction for Text Summarization under Domain-Shift and Instruct-Tuning

EMNLP 2025

Large Language Models (LLMs) often don’t perform as expected under Domain Shift or after Instruct-tuning. A reliable indicator of LLM performance in these settings could assist in decision-making. We present a method that uses the known performance in high-resource domains and fine-tuning settings t

2025

Facts Fade Fast: Evaluating Memorization of Outdated Medical Knowledge in Large Language Models

EMNLP 2025

The growing capabilities of Large Language Models (LLMs) can enhance healthcare by assisting medical researchers, physicians, and improving access to health services for patients. LLMs encode extensive knowledge within their parameters, including medical knowledge derived from many sources. However,

2025

Knowing Before Saying: LLM Representations Encode Information About Chain-of-Thought Success Before Completion

ACL 2025finding

We investigate whether the success of a zero-shot Chain-of-Thought (CoT) process can be predicted before completion. Our classifier, based on LLM representations, performs well even before a single token is generated, suggesting that crucial information about the reasoning process is already present…

2025

Leveraging Semantic Triples for Private Document Generation with Local Differential Privacy Guarantees

EMNLP 2025

Many works at the intersection of Differential Privacy (DP) in Natural Language Processing aim to protect privacy by transforming texts under DP guarantees. This can be performed in a variety of ways, from word perturbations to full document rewriting, and most often under *local* DP. Here, an input

2025

On the Impact of Noise in Differentially Private Text Rewriting

NAACL 2025findings

The field of text privatization often leverages the notion of *Differential Privacy* (DP) to provide formal guarantees in the rewriting or obfuscation of sensitive textual data. A common and nearly ubiquitous form of DP application necessitates the addition of calibrated noise to vector representati…

2025

On the Influence of Context Size and Model Choice in Retrieval-Augmented Generation Systems

NAACL 2025findings

Retrieval-augmented generation (RAG) has emerged as an approach to augment large language models (LLMs) by reducing their reliance on static knowledge and improving answer factuality. RAG retrieves relevant context snippets and generates an answer based on them. Despite its increasing industrial ado…

2025

Step-by-Step Fact Verification System for Medical Claims with Explainable Reasoning

NAACL 2025short

Fact verification (FV) aims to assess the veracity of a claim based on relevant evidence. The traditional approach for automated FV includes a three-part pipeline relying on short evidence snippets and encoder-only inference models. More recent approaches leverage the multi-turn nature of LLMs to ad…

2024

A Comparative Analysis of Word-Level Metric Differential Privacy: Benchmarking the Privacy-Utility Trade-off

COLING 2024main

The application of Differential Privacy to Natural Language Processing techniques has emerged in relevance in recent years, with an increasing number of studies published in established NLP outlets. In particular, the adaptation of Differential Privacy for use in NLP tasks has first focused on the *…

2024

AGB-DE: A Corpus for the Automated Legal Assessment of Clauses in German Consumer Contracts

ACL 2024long

Legal tasks and datasets are often used as benchmarks for the capabilities of language models. However, openly available annotated datasets are rare. In this paper, we introduce AGB-DE, a corpus of 3,764 clauses from German consumer contracts that have been annotated and legally assessed by legal ex…

2024

HealthFC: Verifying Health Claims with Evidence-Based Medical Fact-Checking

COLING 2024main

In the digital age, seeking health advice on the Internet has become a common practice. At the same time, determining the trustworthiness of online medical content is increasingly challenging. Fact-checking has emerged as an approach to assess the veracity of factual claims using evidence from credi…

2024

Improving Health Question Answering with Reliable and Time-Aware Evidence Retrieval

NAACL 2024findings

In today’s digital world, seeking answers to health questions on the Internet is a common practice. However, existing question answering (QA) systems often rely on using pre-selected and annotated evidence documents, thus making them inadequate for addressing novel questions. Our study focuses on th…

2024

MedREQAL: Examining Medical Knowledge Recall of Large Language Models via Question Answering

ACL 2024findings

In recent years, Large Language Models (LLMs) have demonstrated an impressive ability to encode knowledge during pre-training on large text corpora. They can leverage this knowledge for downstream tasks like question answering (QA), even in complex areas involving health topics. Considering their hi…

2024

NLP-KG: A System for Exploratory Search of Scientific Literature in Natural Language Processing

ACL 2024system demonstrations

Scientific literature searches are often exploratory, whereby users are not yet familiar with a particular field or concept but are interested in learning more about it. However, existing systems for scientific literature search are typically tailored to keyword-based lookup searches, limiting the p…

2024

Thinking Outside of the Differential Privacy Box: A Case Study in Text Privatization with Language Model Prompting

EMNLP 2024main

The field of privacy-preserving Natural Language Processing has risen in popularity, particularly at a time when concerns about privacy grow with the proliferation of large language models. One solution consistently appearing in recent literature has been the integration of Differential Privacy (DP)…