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🔍 dirk westhoff 📂 Computer Science
Showing 1665 results for "dirk westhoff" in Computer Science
Computer Science Preprint PDF DOI

FloatSOM: GPU-Accelerated, Distributed, Topology-Flexible Self-Organizing Maps

Tony Xu, Sarah Klamt, Katherine Turner, Anne Brustle, Felix Marsh-Wakefield, Givanna Putri · 2026

GPU-accelerated Self-Organizing Map (SOM) implementations are among the most competitive options for large-scale SOM analysis, but growing dataset sizes increasingly challenge their practical use beca…

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Computer Science Preprint PDF DOI

Small Independent Sets versus Small Separator in Geometric Intersection Graphs

Malory Marin, Remi Watrigant · 2026

While most classical NP-hard graph problems cannot be solved in time $2^{o(n)}$ on general graphs under the Exponential Time Hypothesis (ETH), many exhibit the square-root phenomenon and admit optimal…

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Computer Science Preprint PDF DOI

Institutional Floors and Partisan Lenses: Cross-National Online Discourse on Political Violence in France and the United States

Andrew Yen Chang · 2026

This paper studies how online discussion shapes and assesses political violence across different settings, particularly how moral evaluation, as a social perception, varies across institutional contex…

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Computer Science Preprint PDF DOI

A dynamic $(1+\varepsilon)$-spanner for disk intersection graphs

Sarita de Berg, Ivor van der Hoog, Eva Rotenberg, Johanne M. Vistisen, Sampson Wong · 2026

We maintain a $(1+\varepsilon)$-spanner over the disk intersection graph of a dynamic set of disks. We restrict all disks to have their diameter in $[4,\Psi]$ for some fixed and known $\Psi$. The resu…

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Computer Science Preprint PDF DOI

Large-Scale Photogrammetric Documentation of St. John's Co-Cathedral: A Workflow for Cultural Heritage Preservation

Matthew Kenely, Mark Bugeja, Andre Grima, Peter Pullicino, Matthew Pullicino, Dylan Seychell · 2026

We present a comprehensive methodology for the large-scale photogrammetric documentation of St. John's Co-Cathedral in Valletta, Malta, a UNESCO World Heritage site renowned for its ornate Baroque arc…

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Computer Science Preprint PDF DOI

Research on the efficiency of data loading and storage in Data Lakehouse architectures for the formation of analytical data systems

Ivan Borodii, Halyna Osukhivska · 2026

The paper presents a study of the efficiency of loading and storing data in the three most common Data Lakehouse systems, including Apache Hudi, Apache Iceberg, and Delta Lake, using Apache Spark as a…

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Computer Science Preprint PDF DOI

Optimizing High-Throughput Distributed Data Pipelines for Reproducible Deep Learning at Scale

Kashish Mittal, Di Yu, Roozbeh Ketabi, Arushi Arora, Brendon Lapp, Peng Zhang · 2026

Training massive-scale deep learning models on datasets spanning tens of terabytes presents critical challenges in hardware utilization and training reproducibility. In this paper, we identify and res…

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Computer Science Preprint PDF DOI

Onyx: Cost-Efficient Disk-Oblivious ANN Search

Deevashwer Rathee, Jean-Luc Watson, Zirui Neil Zhao, G. Edward Suh, Raluca Ada Popa · 2026

Approximate nearest neighbor (ANN) search in AI systems increasingly handles sensitive data on third-party infrastructure. Trusted execution environments (TEEs) offer protection, but cost-efficient de…

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Computer Science Preprint PDF DOI

Maximum Solow--Polasky Diversity Subset Selection Is NP-hard Even in the Euclidean Plane

Michael T. M. Emmerich, Ksenia Pereverdieva, Andre H. Deutz · 2026

We prove that, for every fixed $\theta_0>0$, selecting a subset of prescribed cardinality that maximizes the Solow--Polasky diversity indicator is NP-hard for finite point sets in $\mathbb{R}^2$ with …

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Computer Science Preprint PDF DOI

Bandwidth Cost of Locally Repairable Convertible Codes in the Global Merge Regime

Saransh Chopra, Shubhransh Singhvi, K.V. Rashmi · 2026

Recent studies have shown that distributed storage systems can achieve significant space savings by adapting redundancy levels to varying disk failure rates. This adaptation is performed via code conv…

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Computer Science Preprint PDF DOI

A Unified Model and Document Representation for On-Device Retrieval-Augmented Generation

Julian Killingback, Ofer Meshi, Henry Li, Hamed Zamani, Maryam Karimzadehgan · 2026

Traditional Retrieval-Augmented Generation (RAG) approaches generally assume that retrieval and generation occur on powerful servers removed from the end user. While this reduces local hardware constr…

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Computer Science Preprint PDF DOI

Towards Automated Pentesting with Large Language Models

Ricardo Bessa, Rui Claro, Joao Trindade, Joao Lourenco · 2026

Large Language Models (LLMs) are redefining offensive cybersecurity by allowing the generation of harmful machine code with minimal human intervention. While attackers take advantage of dark LLMs such…

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Computer Science Preprint PDF DOI

Maximum Independent Sets in Disk Graphs with Disks in Convex Position

Anastasiia Tkachenko, Haitao Wang · 2026

For a set $\mathcal{D}$ of disks in the plane, its disk graph $G(\mathcal{D})$ is the graph with vertex set $\mathcal{D}$, where two vertices are adjacent if and only if the corresponding disks inters…

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Computer Science Preprint PDF DOI

Decoupling Vector Data and Index Storage for Space Efficiency

Yuanming Ren, Juncheng Zhang, Yanjing Ren, Rui Yang, Di Wu, Patrick P. C. Lee · 2026

Managing large-scale vector datasets with disk-based approximate nearest neighbor search (ANNS) systems faces critical efficiency challenges stemming from the co-location of vector data and auxiliary …

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Computer Science Preprint PDF DOI

Causal Inference for Quantifying Noisy Neighbor Effects in Multi-Tenant Cloud Environments

Philipe S. Schiavo, Joao P. S. Milanezi, Moises R. N. Ribeiro, Victor M. G. Martinez, Joao Henrique Correa, Jose Marcos Nogueira, Fernando Frota Redigolo, Tereza C. Carvalho, Flavio de Oliveira Silva · 2026

Resource sharing in multi-tenant cloud environments enables cost efficiency but introduces the Noisy Neighbor problem, i.e., co-located workloads that unpredictably degrade each other's performance. D…

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Computer Science Preprint PDF DOI

Opal: Private Memory for Personal AI

Darya Kaviani, Alp Eren Ozdarendeli, Jinhao Zhu, Yu Ding, Raluca Ada Popa · 2026

Personal AI systems increasingly retain long-term memory of user activity, including documents, emails, messages, meetings, and ambient recordings. Trusted hardware can keep this data private, but str…

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Computer Science Preprint PDF DOI

Dark Patterns in Indian Quick Commerce Apps: A Student Perspective

Tanish Taneja, Arihant Tripathy, Nimmi Rangaswamy · 2026

As quick commerce (Q-Commerce) platforms in India redefine urban consumption, the use of deceptive design dark patterns to inflate order values has become a systemic concern. This paper investigates t…

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Computer Science Preprint PDF DOI

Approximating the Permanent of a Random Matrix with Polynomially Small Mean: Zeros and Universality

Frederic Koehler, Pui Kuen Leung · 2026

We study algorithms for approximating the permanent of a random matrix when the entries are slightly biased away from zero. This question is motivated by the goal of understanding the classical comple…

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Computer Science Preprint PDF DOI

Stand-Alone Complex or Vibercrime? Exploring the adoption and innovation of GenAI tools, coding assistants, and agents within cybercrime ecosystems

Jack Hughes, Ben Collier, Daniel R. Thomas · 2026

Existential risk scenarios relating to Generative Artificial Intelligence often involve advanced systems or agentic models breaking loose and using hacking tools to gain control over critical infrastr…

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Computer Science Preprint PDF DOI

DaiSy: A Library for Scalable Data Series Similarity Search

Francesca Del Gaudio, Manos Chatzakis, Gayathiri Ravendirane, Botao Peng, Themis Palpanas · 2026

Exact similarity search over large collections of data series is a fundamental operation in modern applications, yet existing solutions are often fragmented, specialized, or tailored to specific execu…

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