Justyna Petke - RankMe

127 papers A* 6A 10B 21Journal 48Unranked 38

Year	Rank	Type	Title / Venue / Authors
2026	J	`jnl`	JMigBench: A Benchmark for Evaluating LLMs on Source Code Migration (Java 8 to Java 11). CoRR Nishil Amin, Zhiwei Fei, Xiang Li, Justyna Petke, He Ye
2026	J	`jnl`	Unveiling Practical Shortcomings of Patch Overfitting Detection Techniques. CoRR David Williams, Ioakim Avraam, Aldeida Aleti, Matias Martinez, Justyna Petke, Federica Sarro
2025	J	`jnl`	A Comparison of Large Language Models and Genetic Programming for Program Synthesis. IEEE Trans. Evol. Comput. Dominik Sobania, Justyna Petke, Martin Briesch, Franz Rothlauf
2025	J	`jnl`	A Comprehensive Survey of Benchmarks for Improvement of Software's Non-Functional Properties. ACM Comput. Surv. Aymeric Blot, Justyna Petke
2025	—	`conf`	Behind the Hot Fix: Demystifying Hot Fixing Industrial Practices at Zühlke and Beyond. SIGSOFT FSE Companion Carol Hanna, David Elliman, Wolfgang Emmerich, Federica Sarro, Justyna Petke
2025	—	`conf`	Empirical Comparison of Runtime Improvement Approaches: Genetic Improvement, Parameter Tuning, and Their Combination. GI@ICSE Thanatad Songpetchmongkol, Aymeric Blot, Justyna Petke
2025	—	`conf`	Enhancing Software Runtime With Reinforcement Learning-Driven Mutation Operator Selection in Genetic Improvement. GI@ICSE Damien Bose, Carol Hanna, Justyna Petke
2025	J	`jnl`	Enhancing search-based testing with LLMs for finding bugs in system simulators. Autom. Softw. Eng. Aidan Dakhama, Karine Even-Mendoza, William B. Langdon, Héctor D. Menéndez, Justyna Petke
2025	—	`conf`	From Kotlin to Swift and Back: Toward Fully Automated Cross-Language Code Transpilation. ASEW Sachi Lad, Carol Hanna, Justyna Petke
2025	—	`conf`	GAFLERNA Ahoy! Integrating EM Side-Channel Analysis into Traditional Fuzzing Workflows. SIGSOFT FSE Companion Jorge Barredo, Justyna Petke, David Clark, Daniel Blackwell, Maialen Eceiza, Jose Luis Flores, Mikel Iturbe
2025	J	`jnl`	HotBugs.jar: A Benchmark of Hot Fixes for Time-Critical Bugs. CoRR Carol Hanna, Federica Sarro, Mark Harman, Justyna Petke
2025	A*	`conf`	LLM-Guided Genetic Improvement: Envisioning Semantic Aware Automated Software Evolution. ASE Karine Even-Mendoza, Alexander E. I. Brownlee, Alina Geiger, Carol Hanna, Justyna Petke, Federica Sarro, Dominik Sobania
2025	J	`jnl`	LLM-Guided Genetic Improvement: Envisioning Semantic Aware Automated Software Evolution. CoRR Karine Even-Mendoza, Alexander E. I. Brownlee, Alina Geiger, Carol Hanna, Justyna Petke, Federica Sarro, Dominik Sobania
2025	—	`conf`	Large Language Model Based Code Completion is an Effective Genetic Improvement Mutation. GI@ICSE Jingyuan Wang, Carol Hanna, Justyna Petke
2025	J	`jnl`	Large language model based mutations in genetic improvement. Autom. Softw. Eng. Alexander E. I. Brownlee, James Callan, Karine Even-Mendoza, Alina Geiger, Carol Hanna, Justyna Petke, Federica Sarro, Dominik Sobania
2025	—	`conf`	Llm-Assisted Crossover in Genetic Improvement of Software. GI@ICSE Dimitrios Stamatios Bouras, Sergey Mechtaev, Justyna Petke
2025	J	`jnl`	Multi-objective improvement of Android applications. Autom. Softw. Eng. James Callan, Justyna Petke
2025	J	`jnl`	Reflecting on Empirical and Sustainability Aspects of Software Engineering Research in the Era of Large Language Models. CoRR David Williams, Max Hort, Maria Kechagia, Aldeida Aleti, Justyna Petke, Federica Sarro
2025	J	`jnl`	Reinforcement learning for mutation operator selection in automated program repair. Autom. Softw. Eng. Carol Hanna, Aymeric Blot, Justyna Petke
2025	—	`conf`	Search+LLM-Based Testing for ARM Simulators. SEIP@ICSE Karine Even-Mendoza, Héctor D. Menéndez, William B. Langdon, Aidan Dakhama, Justyna Petke, Bobby R. Bruce
2025	J	`jnl`	Software Product Line Engineering via Software Transplantation. ACM Trans. Softw. Eng. Methodol. Leandro O. Souza, Eduardo Santana de Almeida, Paulo Anselmo da Mota Silveira Neto, Earl T. Barr, Justyna Petke
2024	B	`conf`	Fuzzing-Based Differential Testing for Quantum Simulators. SSBSE Daniel Blackwell, Justyna Petke, Yazhuo Cao, Avner Bensoussan
2024	J	`jnl`	Hot Fixing Software: A Comprehensive Review of Terminology, Techniques, and Applications. CoRR Carol Hanna, David Clark, Federica Sarro, Justyna Petke
2024	A*	`conf`	Mining for Mutation Operators for Reduction of Information Flow Control Violations. ASE Ilya Kosorukov, Daniel Blackwell, David Clark, Myra B. Cohen, Justyna Petke
2024	—	`conf`	On Reducing Network Usage with Genetic Improvement. GI@ICSE James Callan, William B. Langdon, Justyna Petke
2024	J	`jnl`	Speeding Up Genetic Improvement via Regression Test Selection. ACM Trans. Softw. Eng. Methodol. Giovani Guizzo, David Williams, Mark Harman, Justyna Petke, Federica Sarro
2024	J	`jnl`	Test-based patch clustering for automatically-generated patches assessment. Empir. Softw. Eng. Matias Martinez, Maria Kechagia, Anjana Perera, Justyna Petke, Federica Sarro, Aldeida Aleti
2024	J	`jnl`	The 13th International Workshop on Genetic Improvement(GI @ ICSE 2024). ACM SIGSOFT Softw. Eng. Notes William B. Langdon, Gabin An, Aymeric Blot, Vesna Nowack, Justyna Petke, Shin Yoo, Oliver Krauss, Erik M. Fredericks, Daniel Blackwell
2024	—	`conf`	The Patch Overfitting Problem in Automated Program Repair: Practical Magnitude and a Baseline for Realistic Benchmarking. SIGSOFT FSE Companion Justyna Petke, Matias Martinez, Maria Kechagia, Aldeida Aleti, Federica Sarro
2024	—	`conf`	User-Centric Deployment of Automated Program Repair at Bloomberg. ICSE-SEIP David Williams, James Callan, Serkan Kirbas, Sergey Mechtaev, Justyna Petke, Thomas Prideaux-Ghee, Federica Sarro
2023	—	`conf`	An Analysis of the Automatic Bug Fixing Performance of ChatGPT. APR@ICSE Dominik Sobania, Martin Briesch, Carol Hanna, Justyna Petke
2023	J	`jnl`	An Analysis of the Automatic Bug Fixing Performance of ChatGPT. CoRR Dominik Sobania, Martin Briesch, Carol Hanna, Justyna Petke
2023	B	`conf`	Enhancing Genetic Improvement Mutations Using Large Language Models. SSBSE Alexander E. I. Brownlee, James Callan, Karine Even-Mendoza, Alina Geiger, Carol Hanna, Justyna Petke, Federica Sarro, Dominik Sobania
2023	J	`jnl`	Enhancing Genetic Improvement Mutations Using Large Language Models. CoRR Alexander E. I. Brownlee, James Callan, Karine Even-Mendoza, Alina Geiger, Carol Hanna, Justyna Petke, Federica Sarro, Dominik Sobania
2023	B	`conf`	Evaluating Explanations for Software Patches Generated by Large Language Models. SSBSE Dominik Sobania, Alina Geiger, James Callan, Alexander E. I. Brownlee, Carol Hanna, Rebecca Moussa, Mar Zamorano López, Justyna Petke, Federica Sarro
2023	J	`jnl`	GI Software with fewer Data Cache Misses. CoRR William B. Langdon, Justyna Petke, Aymeric Blot, David Clark
2023	J	`jnl`	Genetic Improvement @ ICSE 2023. ACM SIGSOFT Softw. Eng. Notes William B. Langdon, Vesna Nowack, Justyna Petke, Markus Wagner, Hyeonseok Lee, Erik M. Fredericks, Gabin An, Aymeric Blot
2023	—	`conf`	Genetically Improved Software with fewer Data Cache Misses. GECCO Companion William B. Langdon, Justyna Petke, Aymeric Blot, David Clark
2023	A*	`conf`	Hot Patching Hot Fixes: Reflection and Perspectives. ASE Carol Hanna, Justyna Petke
2023	J	`jnl`	Multi-Objective Improvement of Android Applications. CoRR James Callan, Justyna Petke
2023	J	`jnl`	Program transformation landscapes for automated program modification using Gin. Empir. Softw. Eng. Justyna Petke, Brad Alexander, Earl T. Barr, Alexander E. I. Brownlee, Markus Wagner, David Robert White
2023	J	`jnl`	Reinforcement Learning for Mutation Operator Selection in Automated Program Repair. CoRR Carol Hanna, Aymeric Blot, Justyna Petke
2023	B	`conf`	SearchGEM5: Towards Reliable Gem5 with Search Based Software Testing and Large Language Models. SSBSE Aidan Dakhama, Karine Even-Mendoza, William B. Langdon, Héctor D. Menéndez, Justyna Petke
2023	J	`jnl`	Software Product Line Engineering via Software Transplantation. CoRR Leandro O. Souza, Earl T. Barr, Justyna Petke, Eduardo Santana de Almeida, Paulo Anselmo da Mota Silveira Neto
2023	J	`jnl`	User-Centric Deployment of Automated Program Repair at Bloomberg. CoRR David Williams, James Callan, Serkan Kirbas, Sergey Mechtaev, Justyna Petke, Thomas Prideaux-Ghee, Federica Sarro
2022	J	`jnl`	A Comprehensive Survey of Benchmarks for Automated Improvement of Software's Non-Functional Properties. CoRR Aymeric Blot, Justyna Petke
2022	—	`conf`	Evaluation of genetic improvement tools for improvement of non-functional properties of software. GECCO Companion Shengjie Zuo, Aymeric Blot, Justyna Petke
2022	J	`jnl`	How do Android developers improve non-functional properties of software? Empir. Softw. Eng. James Callan, Oliver Krauss, Justyna Petke, Federica Sarro
2022	—	`conf`	Improving Responsiveness of Android Activity Navigation via Genetic Improvement. ICSE-Companion James Callan, Justyna Petke
2022	A*	`conf`	Keeping Secrets: Multi-objective Genetic Improvement for Detecting and Reducing Information Leakage. ASE Ibrahim Mesecan, Daniel Blackwell, David Clark, Myra B. Cohen, Justyna Petke
2022	J	`jnl`	MAGPIE: Machine Automated General Performance Improvement via Evolution of Software. CoRR Aymeric Blot, Justyna Petke
2022	B	`conf`	Multi-objective Genetic Improvement: A Case Study with EvoSuite. SSBSE James Callan, Justyna Petke
2022	J	`jnl`	Test-based Patch Clustering for Automatically-Generated Patches Assessment. CoRR Matias Martinez, Maria Kechagia, Anjana Perera, Justyna Petke, Federica Sarro, Aldeida Aleti
2021	—	`conf`	Artifact for Enhancing Genetic Improvement of Software with Regression Test Selection. ICSE (Companion Volume) Giovani Guizzo, Justyna Petke, Federica Sarro, Mark Harman
2021	J	`jnl`	Comparative Analysis of Constraint Handling Techniques for Constrained Combinatorial Testing. IEEE Trans. Software Eng. Huayao Wu, Changhai Nie, Justyna Petke, Yue Jia, Mark Harman
2021	—	`conf`	Dissipative polynomials. GECCO Companion William B. Langdon, Justyna Petke, David Clark
2021	J	`jnl`	Empirical Comparison of Search Heuristics for Genetic Improvement of Software. IEEE Trans. Evol. Comput. Aymeric Blot, Justyna Petke
2021	A*	`conf`	Enhancing Genetic Improvement of Software with Regression Test Selection. ICSE Giovani Guizzo, Justyna Petke, Federica Sarro, Mark Harman
2021	A*	`conf`	HyperGI: Automated Detection and Repair of Information Flow Leakage. ASE Ibrahim Mesecan, Daniel Blackwell, David Clark, Myra B. Cohen, Justyna Petke
2021	J	`jnl`	HyperGI: Automated Detection and Repair of Information Flow Leakage. CoRR Ibrahim Mesecan, Daniel Blackwell, David Clark, Myra B. Cohen, Justyna Petke
2021	B	`conf`	Improving Android App Responsiveness Through Automated Frame Rate Reduction. SSBSE James Callan, Justyna Petke
2021	—	`conf`	Optimising SQL Queries Using Genetic Improvement. GI@ICSE James Callan, Justyna Petke
2021	B	`conf`	Refining Fitness Functions for Search-Based Automated Program Repair - A Case Study with ARJA and ARJA-e. SSBSE Giovani Guizzo, Aymeric Blot, James Callan, Justyna Petke, Federica Sarro
2021	—	`conf`	Refining Fitness Functions for Search-Based Program Repair. APR@ICSE Zhiqiang Bian, Aymeric Blot, Justyna Petke
2021	—	`conf`	Software robustness: a survey, a theory, and prospects. ESEC/SIGSOFT FSE Justyna Petke, David Clark, William B. Langdon
2021	—	`conf`	Uniform Edit Selection for Genetic Improvement: Empirical Analysis of Mutation Operator Efficacy. GI@ICSE Marta Smigielska, Aymeric Blot, Justyna Petke
2020	J	`jnl`	An Empirical Comparison of Combinatorial Testing, Random Testing and Adaptive Random Testing. IEEE Trans. Software Eng. Huayao Wu, Changhai Nie, Justyna Petke, Yue Jia, Mark Harman
2020	B	`conf`	Comparing Genetic Programming Approaches for Non-functional Genetic Improvement. EuroGP Aymeric Blot, Justyna Petke
2020	J	`jnl`	Genetic Improvement @ ICSE 2020. CoRR William B. Langdon, Westley Weimer, Justyna Petke, Erik M. Fredericks, Seongmin Lee, Emily Winter, Michail Basios, Myra B. Cohen, Aymeric Blot, Markus Wagner, Bobby R. Bruce, Shin Yoo, Simos Gerasimou, Oliver Krauss, Yu Huang, Michael C. Gerten
2020	J	`jnl`	Genetic Improvement @ ICSE 2020. ACM SIGSOFT Softw. Eng. Notes William B. Langdon, Westley Weimer, Justyna Petke, Erik M. Fredericks, Seongmin Lee, Emily Winter, Michail Basios, Myra B. Cohen, Aymeric Blot, Markus Wagner, Bobby R. Bruce, Shin Yoo, Simos Gerasimou, Oliver Krauss, Yu Huang, Michael C. Gerten
2020	B	`conf`	Impact of Test Suite Coverage on Overfitting in Genetic Improvement of Software. SSBSE Mingyi Lim, Giovani Guizzo, Justyna Petke
2020	B	`conf`	Injecting Shortcuts for Faster Running Java Code. CEC Alexander E. I. Brownlee, Justyna Petke, Anna F. Rasburn
2020	—	`conf`	Refining Fitness Functions in Test-Based Program Repair. ICSE (Workshops) Justyna Petke, Aymeric Blot
2020	—	`conf`	Stack-Based Genetic Improvement. ICSE (Workshops) Aymeric Blot, Justyna Petke
2020	—	`conf`	Synthetic Benchmarks for Genetic Improvement. ICSE (Workshops) Aymeric Blot, Justyna Petke
2019	J	`jnl`	A Survey of Constrained Combinatorial Testing. CoRR Huayao Wu, Changhai Nie, Justyna Petke, Yue Jia, Mark Harman
2019	—	`conf`	A survey of genetic improvement search spaces. GECCO (Companion) Justyna Petke, Brad Alexander, Earl T. Barr, Alexander E. I. Brownlee, Markus Wagner, David Robert White
2019	J	`jnl`	Approximate Oracles and Synergy in Software Energy Search Spaces. IEEE Trans. Software Eng. Bobby R. Bruce, Justyna Petke, Mark Harman, Earl T. Barr
2019	—	`conf`	Genetic improvement of data gives binary logarithm from sqrt. GECCO (Companion) William B. Langdon, Justyna Petke
2019	A	`conf`	Gin: genetic improvement research made easy. GECCO Alexander E. I. Brownlee, Justyna Petke, Brad Alexander, Earl T. Barr, Markus Wagner, David Robert White
2019	—	`conf`	On adaptive specialisation in genetic improvement. GECCO (Companion) Aymeric Blot, Justyna Petke
2019	—	`ed.`	Proceedings of the 6th International Workshop on Genetic Improvement, GI@ICSE 2019, Montreal, Quebec, Canada, May 28, 2019. GI@ICSE Justyna Petke, Shin Hwei Tan, William B. Langdon, Westley Weimer
2019	—	`conf`	PyGGI 2.0: language independent genetic improvement framework. ESEC/SIGSOFT FSE Gabin An, Aymeric Blot, Justyna Petke, Shin Yoo
2019	B	`conf`	Software Improvement with Gin: A Case Study. SSBSE Justyna Petke, Alexander E. I. Brownlee
2018	B	`conf`	Evolving Better RNAfold Structure Prediction. EuroGP William B. Langdon, Justyna Petke, Ronny Lorenz
2018	B	`conf`	Evolving Better Software Parameters. SSBSE William B. Langdon, Justyna Petke
2018	J	`jnl`	Genetic Improvement of Software (Dagstuhl Seminar 18052). Dagstuhl Reports Justyna Petke, Claire Le Goues, Stephanie Forrest, William B. Langdon
2018	J	`jnl`	Genetic Improvement of Software: A Comprehensive Survey. IEEE Trans. Evol. Comput. Justyna Petke, Saemundur O. Haraldsson, Mark Harman, William B. Langdon, David Robert White, John R. Woodward
2018	J	`jnl`	Guest Editorial for the Special Section from the 9th International Symposium on Search Based Software Engineering. Inf. Softw. Technol. Justyna Petke, Tim Menzies
2018	—	`ed.`	Proceedings of the 4th International Genetic Improvement Workshop, GI@ICSE 2018, Gothenburg, Sweden, June 2, 2018 GI@ICSE Justyna Petke, Kathryn T. Stolee, William B. Langdon, Westley Weimer
2018	J	`jnl`	Specialising Software for Different Downstream Applications Using Genetic Improvement and Code Transplantation. IEEE Trans. Software Eng. Justyna Petke, Mark Harman, William B. Langdon, Westley Weimer
2017	—	`conf`	10th International Workshop on Search-Based Software Testing (SBST 2017). SBST@ICSE Juan Pablo Galeotti, Justyna Petke
2017	—	`conf`	Combinatorial Interaction Testing for Automated Constraint Repair. ICST Workshops Angelo Gargantini, Justyna Petke, Marco Radavelli
2017	J	`jnl`	Genetic improvement of GPU software. Genet. Program. Evolvable Mach. William B. Langdon, Brian Yee Hong Lam, Marc Modat, Justyna Petke, Mark Harman
2017	—	`conf`	New operators for non-functional genetic improvement. GECCO (Companion) Justyna Petke
2017	J	`jnl`	Preface to the Special Issue on Genetic Improvement. Genet. Program. Evolvable Mach. Justyna Petke
2017	B	`ed.`	Search Based Software Engineering - 9th International Symposium, SSBSE 2017, Paderborn, Germany, September 9-11, 2017, Proceedings SSBSE Tim Menzies, Justyna Petke
2017	J	`jnl`	Search Based Software Engineering [Guest Editorial]. IEEE Comput. Intell. Mag. He Jiang, Ke Tang, Justyna Petke, Mark Harman
2016	B	`conf`	API-Constrained Genetic Improvement. SSBSE William B. Langdon, David Robert White, Mark Harman, Yue Jia, Justyna Petke
2016	—	`conf`	Benchmarking Genetically Improved BarraCUDA on Epigenetic Methylation NGS datasets and nVidia GPUs. GECCO (Companion) William B. Langdon, Albert Vilella, Brian Yee Hong Lam, Justyna Petke, Mark Harman
2016	B	`conf`	Deep Parameter Optimisation for Face Detection Using the Viola-Jones Algorithm in OpenCV. SSBSE Bobby R. Bruce, Jonathan M. Aitken, Justyna Petke
2016	—	`conf`	Genetic Improvement 2016 Chairs' Welcome & Organization. GECCO (Companion) Westley Weimer, Justyna Petke, David Robert White
2016	—	`conf`	Genetic Improvement for Code Obfuscation. GECCO (Companion) Justyna Petke
2016	A	`conf`	Optimising Quantisation Noise in Energy Measurement. PPSN William B. Langdon, Justyna Petke, Bobby R. Bruce
2016	B	`conf`	Validation of Constraints Among Configuration Parameters Using Search-Based Combinatorial Interaction Testing. SSBSE Angelo Gargantini, Justyna Petke, Marco Radavelli, Paolo Vavassori
2015	A	`conf`	Automated software transplantation. ISSTA Earl T. Barr, Mark Harman, Yue Jia, Alexandru Marginean, Justyna Petke
2015	—	`book`	Bridging Constraint Satisfaction and Boolean Satisfiability Justyna Petke
2015	—	`conf`	Constraints: The Future of Combinatorial Interaction Testing. SBST@ICSE Justyna Petke
2015	—	`conf`	GI4GI: Improving Genetic Improvement Fitness Functions. GECCO (Companion) Mark Harman, Justyna Petke
2015	A	`conf`	Improving CUDA DNA Analysis Software with Genetic Programming. GECCO William B. Langdon, Brian Yee Hong Lam, Justyna Petke, Mark Harman
2015	—	`conf`	Learning Combinatorial Interaction Test Generation Strategies Using Hyperheuristic Search. ICSE (1) Yue Jia, Myra B. Cohen, Mark Harman, Justyna Petke
2015	J	`jnl`	Practical Combinatorial Interaction Testing: Empirical Findings on Efficiency and Early Fault Detection. IEEE Trans. Software Eng. Justyna Petke, Myra B. Cohen, Mark Harman, Shin Yoo
2015	A	`conf`	Reducing Energy Consumption Using Genetic Improvement. GECCO Bobby R. Bruce, Justyna Petke, Mark Harman
2015	B	`conf`	Testing Django Configurations Using Combinatorial Interaction Testing. SSBSE Justyna Petke
2014	A	`conf`	Genetic improvement for adaptive software engineering (keynote). SEAMS Mark Harman, Yue Jia, William B. Langdon, Justyna Petke, Iman Hemati Moghadam, Shin Yoo, Fan Wu
2014	A	`conf`	Improving 3D medical image registration CUDA software with genetic programming. GECCO William B. Langdon, Marc Modat, Justyna Petke, Mark Harman
2014	J	`jnl`	Local Consistency and SAT-Solvers. CoRR Peter Jeavons, Justyna Petke
2014	B	`conf`	Search based software engineering for software product line engineering: a survey and directions for future work. SPLC Mark Harman, Yue Jia, Jens Krinke, William B. Langdon, Justyna Petke, Yuanyuan Zhang
2014	B	`conf`	Using Genetic Improvement and Code Transplants to Specialise a C++ Program to a Problem Class. EuroGP Justyna Petke, Mark Harman, William B. Langdon, Westley Weimer
2013	B	`conf`	Applying Genetic Improvement to MiniSAT. SSBSE Justyna Petke, William B. Langdon, Mark Harman
2013	J	`jnl`	Cliquewidth and Knowledge Compilation CoRR Igor Razgon, Justyna Petke
2013	A	`conf`	Cliquewidth and Knowledge Compilation. SAT Igor Razgon, Justyna Petke
2013	—	`conf`	Efficiency and early fault detection with lower and higher strength combinatorial interaction testing. ESEC/SIGSOFT FSE Justyna Petke, Shin Yoo, Myra B. Cohen, Mark Harman
2012	J	`jnl`	Local Consistency and SAT-Solvers. J. Artif. Intell. Res. Peter Jeavons, Justyna Petke
2012	—	`—`	On the bridge between constraint satisfaction and Boolean satisfiability. Justyna Petke
2011	A	`conf`	The Order Encoding: From Tractable CSP to Tractable SAT. SAT Justyna Petke, Peter Jeavons
2010	A	`conf`	Local Consistency and SAT-Solvers. CP Justyna Petke, Peter Jeavons