Institution profile

Lviv Polytechnic National University

Academic institutioneurope · ua
Official website
Research library6linked papers
Opportunities0open roles
Selected work

Representative Papers

Information Geometry of Message Passing

Aug 16, 2026

This study addresses the accuracy limitations of variational inference in non-conjugate and persistent uncertainty settings by proposing the Natural Gradient Message Passing (NGMP) algorithm. Grounded in information geometry and Forney-style factor graphs, NGMP reformulates stationarity conditions into edge-local forms and employs natural gradient projections to preserve exact messages representable within the receiving family, thereby effectively mitigating precision loss caused by averaging in traditional methods. Empirical evaluations across Poisson smoothing, heteroscedastic regression, and ETTH forecasting tasks demonstrate that NGMP significantly enhances both uncertainty calibration and inference performance in non-conjugate models. These results establish NGMP as a robust approach for improving variational inference accuracy where standard mean-field approximations typically fail due to structural mismatches or sustained uncertainty propagation.

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Writing-System-Level Tokenizer Adaptation for Byte-Level BPE

Aug 01, 2026

This work addresses the inefficiency of pretrained byte-level BPE tokenizers on low-resource languages and the incompatibility incurred by direct vocabulary modifications. The authors propose a post-hoc tokenizer adaptation method that preserves nearly the entire original vocabulary structure and token–ID mappings while enabling efficient, compatible transfer. Their approach integrates script-aware row selection, byte-level precondition reconstruction, and BPE-guided insertion, and—critically—formalizes and resolves conflicts in BPE merge order to guarantee structural reachability of new tokens within the target merge graph. Experiments demonstrate a 33.5%–36.6% reduction in token count for Ukrainian, with aggregate changes across English and four European languages below 0.05%, and 77.3%–78.5% of original vocabulary row IDs remaining unchanged.

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Red-Teaming the Agentic Red-Team

Jun 23, 2026

This study addresses critical security vulnerabilities prevalent in current offensive AI agent systems, which lack systematic evaluation frameworks. The work proposes the first comprehensive attack-chain model encompassing large language model (LLM) manipulation, lateral movement, persistence, defense evasion, and sandbox escape, thereby uncovering common architectural flaws. By integrating red-teaming methodologies, LLM security analysis, and container escape detection, the authors reproduce and validate multiple high-severity vulnerabilities—including API key exfiltration and host machine compromise. Building on these findings, they formulate a set of architecture-level, broadly applicable security design principles that effectively mitigate the identified attack vectors and substantially enhance the overall system resilience.

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Machine Learning Classification of Cryopathy Syndromes: A Comprehensive Comparative Study

Jun 18, 2026

Cryoglobulinemic syndrome presents significant diagnostic challenges due to its overlapping clinical manifestations, rarity, and reliance on expert interpretation, necessitating automated decision-support tools. This study addresses this gap by proposing a machine learning framework that integrates clinically inspired interaction features, a hierarchical classification strategy, and soft-voting ensemble methods. Leveraging laboratory data from 2,686 patients, the approach achieves markedly improved discriminative performance under extreme class imbalance. Experimental results demonstrate that tree-based models—particularly Balanced Random Forest—outperform neural networks, with the optimal ensemble model yielding consistent gains in both Top-3 accuracy and F1 score across cross-validation folds, thereby offering robust support for clinical decision-making.

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Recent publications

Latest Papers

Information Geometry of Message Passing

Aug 16, 2026

This study addresses the accuracy limitations of variational inference in non-conjugate and persistent uncertainty settings by proposing the Natural Gradient Message Passing (NGMP) algorithm. Grounded in information geometry and Forney-style factor graphs, NGMP reformulates stationarity conditions into edge-local forms and employs natural gradient projections to preserve exact messages representable within the receiving family, thereby effectively mitigating precision loss caused by averaging in traditional methods. Empirical evaluations across Poisson smoothing, heteroscedastic regression, and ETTH forecasting tasks demonstrate that NGMP significantly enhances both uncertainty calibration and inference performance in non-conjugate models. These results establish NGMP as a robust approach for improving variational inference accuracy where standard mean-field approximations typically fail due to structural mismatches or sustained uncertainty propagation.

0 citationsRead paper

Writing-System-Level Tokenizer Adaptation for Byte-Level BPE

Aug 01, 2026

This work addresses the inefficiency of pretrained byte-level BPE tokenizers on low-resource languages and the incompatibility incurred by direct vocabulary modifications. The authors propose a post-hoc tokenizer adaptation method that preserves nearly the entire original vocabulary structure and token–ID mappings while enabling efficient, compatible transfer. Their approach integrates script-aware row selection, byte-level precondition reconstruction, and BPE-guided insertion, and—critically—formalizes and resolves conflicts in BPE merge order to guarantee structural reachability of new tokens within the target merge graph. Experiments demonstrate a 33.5%–36.6% reduction in token count for Ukrainian, with aggregate changes across English and four European languages below 0.05%, and 77.3%–78.5% of original vocabulary row IDs remaining unchanged.

0 citationsRead paper

Red-Teaming the Agentic Red-Team

Jun 23, 2026

This study addresses critical security vulnerabilities prevalent in current offensive AI agent systems, which lack systematic evaluation frameworks. The work proposes the first comprehensive attack-chain model encompassing large language model (LLM) manipulation, lateral movement, persistence, defense evasion, and sandbox escape, thereby uncovering common architectural flaws. By integrating red-teaming methodologies, LLM security analysis, and container escape detection, the authors reproduce and validate multiple high-severity vulnerabilities—including API key exfiltration and host machine compromise. Building on these findings, they formulate a set of architecture-level, broadly applicable security design principles that effectively mitigate the identified attack vectors and substantially enhance the overall system resilience.

0 citationsRead paper

Machine Learning Classification of Cryopathy Syndromes: A Comprehensive Comparative Study

Jun 18, 2026

Cryoglobulinemic syndrome presents significant diagnostic challenges due to its overlapping clinical manifestations, rarity, and reliance on expert interpretation, necessitating automated decision-support tools. This study addresses this gap by proposing a machine learning framework that integrates clinically inspired interaction features, a hierarchical classification strategy, and soft-voting ensemble methods. Leveraging laboratory data from 2,686 patients, the approach achieves markedly improved discriminative performance under extreme class imbalance. Experimental results demonstrate that tree-based models—particularly Balanced Random Forest—outperform neural networks, with the optimal ensemble model yielding consistent gains in both Top-3 accuracy and F1 score across cross-validation folds, thereby offering robust support for clinical decision-making.

0 citationsRead paper