Author

Lorenz Sparrenberg

Observed names: Lorenz T. Sparrenberg, Sparrenberg, Lorenz, Sparrenberg, Lorenz Tim

Institutions: University of Bonn, Fraunhofer Institute for Intelligent Analysis and Information Systems, Bonn Aachen International Center for Information Technology, Lamarr Institute for Machine Learning and Artificial Intelligence

Observed institutions: University of Bonn, Fraunhofer Institute for Applied Information Technology, Fraunhofer Institute for Intelligent Analysis and Information Systems, Bonn Aachen International Center for Information Technology, Lamarr Institute for Machine Learning and Artificial Intelligence, RWTH Aachen University

ORCID: 0000-0001-9450-7387

Observed ORCID: 0000-0001-9450-7387

OpenAlex ID: A5086733781

Small and Fast LLMs on Commodity Hardware: Post-Training Quantization in llama. cpp

2025 · Lorenz Sparrenberg, Tobias Deußer, et al. · IEEE International Conference on Data Science and Advanced Analytics (DSAA) · 11

A Comparative Study of Large Language Models for Named Entity Recognition in the Legal Domain

2024 · Tobias Deußer, Cong Zhao, et al. · IEEE International Conference on Big Data (BigData) · 9

A Survey on Current Trends and Recent Advances in Text Anonymization

2025 · Tobias Deußer, Lorenz Sparrenberg, et al. · IEEE International Conference on Data Science and Advanced Analytics (DSAA) · 8

Correcting Systematic Bias in LLM-Generated Dialogues Using Big Five Personality Traits

2024 · Lorenz Sparrenberg, Tobias Schneider, et al. · IEEE International Conference on Big Data (BigData) · 8

A Survey on Current Trends and Recent Advances in Text Anonymization

2025 · Deußer, Tobias, Sparrenberg, Lorenz, et al. · arXiv (Cornell University) · 6

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Reasoning LLMs in the Medical Domain: A Literature Survey

2025 · Armin Berger, Sarthak Khanna, et al. · IEEE International Conference on Data Science and Advanced Analytics (DSAA) · 5

The Illusion of Equivalency: Statistical Characterization of Quantization Effects in LLMs

2026 · Rababah, Baha, Qamar, Shahzeb, et al. · arXiv (Cornell University) · 4

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From Retinal Pixels to Patients: Evolution of Deep Learning Research in Diabetic Retinopathy Screening

2025 · Muskaan Chopra, Lorenz Sparrenberg, et al. · IEEE International Conference on Big Data (BigData) · 4

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Fusing Speech and Language Models for Dementia Detection

2024 · Tobias Deußer, Abdul Mohsin Siddiqi, et al. · IEEE International Conference on Big Data (BigData) · 4

Leveraging Large Language Models for Few-Shot KPI Extraction from Financial Reports

2024 · Tobias Deußer, Cong Zhao, et al. · IEEE International Conference on Big Data (BigData) · 4

Accuracy is Not Enough: A Divergence-Based Approach to Evaluate Fidelity Loss in Quantized LLMs

2026 · Qamar, Shahzeb, Sparrenberg, Lorenz, et al. · arXiv (Cornell University) · 2

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Towards Unified Multimodal Financial Forecasting: Integrating Sentiment Embeddings and Market Indicators via Cross-Modal Attention

2025 · Sarthak Khanna, Armin Berger, et al. · IEEE International Conference on Data Science and Advanced Analytics (DSAA) · 2

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Bleaching correction for DNA measurements in highly diluted solutions using confocal microscopy

2020 · Lorenz T. Sparrenberg, Benjamin Greiner, et al. · PLoS ONE · 2

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On the Impact of Anonymization on the Performance of Large Language Models

2026 · Deußer, Tobias, Hahnbück, Max, et al. · arXiv (Cornell University) · 1

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Generalizing Abstention for Noise-Robust Learning in Medical Image Segmentation

2026 · Moustafa, Wesam, Elsafty, Hossam, et al. · arXiv (Cornell University) · 1

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Cognitive Fingerprinting of Attention-Deficit/Hyperactivity Disorder Subtypes via Artificial Intelligence-Driven Virtual Reality

2025 · Umut Yilmaz, Cemre Karadeniz, et al. · AI in neuroscience. · 1

SynCED-EnDe 2025: A Synthetic and Curated English - German Dataset for Critical Error Detection in Machine Translation

2025 · Chopra, Muskaan, Sparrenberg, Lorenz, et al. · arXiv (Cornell University) · 1

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KI misst Tierwohl in Echtzeit

2021 · Harald P. Mathis, Lorenz Sparrenberg, et al. · agrarzeitung · 1

Evaluating Jev on Arabic: Comparing Decision Models and LLMs Across Arabic Tasks and Dialects

2026 · Elsafty, Hossam, Deußer, Tobias, et al. · Zenodo (CERN European Organization for Nuclear Research)

TopoQuant: Topological Framework to Characterize Behavioral Shifts in Quantized Large Language Models

2026 · Rababah, Baha, Qamar, Shahzeb, et al. · arXiv (Cornell University)

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PlayerEmbed: Learning Behavioral Fingerprint Representations from Raw Input Sequences

2026 · Schneider, Tobias, Sparrenberg, Lorenz, et al. · arXiv (Cornell University)

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Automated Regulatory Compliance Question Answering in Financial Services with Domain-Adapted Retrieval-Augmented Generation

2026 · Deußer, Tobias, Pillai, Abhishek, et al. · arXiv (Cornell University)

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Anforderungen an künstliche Intelligenz-Systeme zur sprachbasierten medizinischen Dokumentation in der Augenheilkunde

2026 · Jan Henrik Terheyden, Simon Haas, et al. · Die Ophthalmologie

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Grokking is a geometric phase transition

2026 · Sparrenberg, Lorenz, Deußer, Tobias, et al. · bonndoc (University of Bonn)

Grokking Is a Geometric Phase Transition: Archetypal Analysis Reveals Causal Structure in Transformer Representations

2026 · Lorenz Sparrenberg, Tobias Deußer, et al. · Lecture notes in computer science

Works count: 39

Citation count: 74

H-index: 5

I10-index: 1