| Upward lightning at wind turbines: Risk assessment from larger-scale meteorology Isabell Stucke, Deborah Morgenstern, Thorsten Simon | L4–5 Advanced | CC-BY | mirrored | 22 pp. | arxiv |
| Urinalysis Atlas: A Pictorial Guide to Formed Elements in Urine (Doty and Taylor) | L1–3 Foundational | CC-BY-NC-SA | mirrored | 27 pp. | libretexts |
| Use of survival analysis and simulation to improve maintenance planning of high voltage instrument transformers in the Dutch transmission system Swasti R. Khuntia, Fatma Zghal, Ranjan Bhuyan | L4–5 Advanced | CC-BY | mirrored | 12 pp. | arxiv |
| Use of Weighted Finite State Transducers in Part of Speech Tagging Evelyne Tzoukermann (Bell Labs), Dragomir R. Radev (Columbia University) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| U.S. History | L1–2 Foundational | CC-BY-NC-SA | mirrored | 987 pp. | openstax |
| Using a Diathesis Model for Semantic Parsing Jordi Atserias, Irene Castellon, Montse Civit | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Using affine policies to reformulate two-stage Wasserstein distributionally robust linear programs to be independent of sample size Youngchae Cho, Insoon Yang | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Using a Probabilistic Class-Based Lexicon for Lexical Ambiguity Resolution Detlef Prescher, Stefan Riezler, Mats Rooth | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Using compression to identify acronyms in text Stuart Yeates, David Bainbridge, Ian H. Witten | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Using existing systems to supplement small amounts of annotated grammatical relations training data Alexander Yeh | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Using Large Language Models to Generate Engaging Captions for Data Visualizations Ashley Liew, Klaus Mueller | L4–5 Advanced | CC-BY | mirrored | 7 pp. | arxiv |
| Using Learning-based Filters to Detect Rule-based Filtering Obsolescence Francis Wolinski, Frantz Vichot, Mathieu Stricker | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Using path integrals to price interest rate derivatives Matthias Otto (Institute of Theoretical Physics, University of Goettingen, Germany) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Using Satellite Imagery and Machine Learning to Estimate the Livelihood Impact of Electricity Access Nathan Ratledge, Gabe Cadamuro, Brandon de la Cuesta | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Using the Scaling Analysis to Characterize Financial Markets T. Di Matteo, T. Aste, M. M. Dacorogna | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Using WordNet for Building WordNets Xavier Farreres, German Rigau & Horacio Rodriguez (Departament de Llenguatges i Sistemes Informatics of the Universitat Politecnica de Catalunya) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Utilitarianism | L2–5 Introductory | Public domain | mirrored | 98 pp. | wikisource |
| Utilitarian resource assignment Petra Berenbrink, Leslie Ann Goldberg, Paul Goldberg | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Utilizing Human Feedback for Primitive Optimization in Wheelchair Tennis Arjun Krishna, Zulfiqar Zaidi, Letian Chen | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Utilizing Prior Solutions for Reward Shaping and Composition in Entropy-Regularized Reinforcement Learning Jacob Adamczyk, Argenis Arriojas, Stas Tiomkin | L4–5 Advanced | CC-BY | mirrored | 14 pp. | arxiv |
| Utilizing Technical Data to Discover Similar Companies in Dhaka Stock Exchange Tashreef Muhammad, Tahsin Aziz, Mohammad Shafiul Alam | L4–5 Advanced | CC-BY | mirrored | 7 pp. | arxiv |
| Utilizing the World Wide Web as an Encyclopedia: Extracting Term Descriptions from Semi-Structured Texts Atsushi Fujii, Tetsuya Ishikawa | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Valid P-Value for Deep Learning-Driven Salient Region Daiki Miwa, Vo Nguyen Le Duy, Ichiro Takeuchi | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Valuation of the Convertible Bonds under Penalty TF model using Finite Element Method Rakhymzhan Kazbek, Yogi Erlangga, Yerlan Amanbek | L4–5 Advanced | CC-BY | mirrored | 19 pp. | arxiv |
| Valuations and dynamic convex risk measures A. Jobert, L. C. G. Rogers | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Value-at-Risk and expected shortfall for linear portfolios with elliptically distributed risk factors Jules Sadefo Kamdem | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Value-at-Risk and Tsallis statistics: risk analysis of the aerospace sector Adriana P. Mattedi, Fernando M. Ramos, Reinaldo R. Rosa | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Value Enhancement of Reinforcement Learning via Efficient and Robust Trust Region Optimization Chengchun Shi, Zhengling Qi, Jianing Wang | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Vanishing of (co)homology of Burch and related submodules Souvik Dey, Toshinori Kobayashi | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Variable Selection Using a Smooth Information Criterion for Distributional Regression Models Meadhbh O'Neill, Kevin Burke | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Variable Word Rate N-grams Yoshihiko Gotoh, Steve Renals | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Variational Autoencoders for Anomalous Jet Tagging Taoli Cheng, Jean-Fran\c{c}ois Arguin, Julien Leissner-Martin | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Variational projector-augmented wave method: a full-potential approach for electronic structure calculations in solid-state physics Mi-Song Dupuy | L4–5 Advanced | CC-BY | mirrored | 29 pp. | arxiv |
| Variation and Synthetic Speech Corey Miller, Orhan Karaali, Noel Massey | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Variety of Stock Returns in Normal and Extreme Market Days: The August 1998 Crisis Fabrizio Lillo, Giovanni Bonanno, Rosario N. Mantegna | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Verbal Interactions in Virtual Worlds Pierre Nugues | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Verifying Termination of General Logic Programs with Concrete Queries Yi-Dong Shen, Li-Yan Yuan, Jia-Huai You | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Veterinary Histology Ryan Jennings, Christopher Premanandan | L1–3 Foundational | CC-BY-NC | mirrored | 171 pp. | libretexts |
| Vicious walkers, friendly walkers and Young tableaux III: Between two walls Christian Krattenthaler (Universit\"at Wien), Anthony J. Guttmann (University of Melbourne), Xavier G. Viennot (Universit\'e Bordeaux 1) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| View fusion vis-\`a-vis a Bayesian interpretation of Black-Litterman for portfolio allocation Trent Spears, Stefan Zohren, Stephen Roberts | L4–5 Advanced | CC-BY | mirrored | 25 pp. | arxiv |
| Vine Copula based portfolio level conditional risk measure forecasting Emanuel Sommer, Karoline Bax, Claudia Czado | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Virtual Observatory: From Concept to Implementation S.G. Djorgovski, R. Williams | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Vital Sign Measurement Across the Lifespan Lapum et al. | L1–3 Foundational | CC-BY | mirrored | 156 pp. | libretexts |
| Volatility conditional on price trends Gilles Zumbach | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Volatility fingerprints of large shocks: Endogeneous versus exogeneous D. Sornette (CNRS, Univ. Nice, UCLA) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Volatility forecasting with machine learning and intraday commonality Chao Zhang, Yihuang Zhang, Mihai Cucuringu | L4–5 Advanced | CC-BY | mirrored | 45 pp. | arxiv |
| Volatility in the Italian Stock Market: an Empirical Study Marco Raberto (1), Enrico Scalas (2), Gianaurelio Cuniberti (3) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| Von Neumann Quantum Logic vs. Classical von Neumann Architecture? Alexander Yu. Vlasov (FRC/IRH, St.-Petersburg, Russia) | L4–5 Advanced | Licence unknown | link only | — | arxiv |
| VQA and Visual Reasoning: An Overview of Recent Datasets, Methods and Challenges Rufai Yusuf Zakari, Jim Wilson Owusu, Hailin Wang | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |
| Waiting Times in Simulated Stock Markets Alessandro Cappellini, Gianluigi Ferraris | L4–5 Advanced | arxiv-nonexclusive | link only | — | arxiv |