no code implementations • 6 Apr 2024 • Pengyuan Lu, Lin Zhang, Mengyu Liu, Kaustubh Sridhar, Fanxin Kong, Oleg Sokolsky, Insup Lee
Cyber-physical systems (CPS) have experienced rapid growth in recent decades.
no code implementations • 13 Nov 2023 • Xi Zheng, Aloysius K. Mok, Ruzica Piskac, Yong Jae Lee, Bhaskar Krishnamachari, Dakai Zhu, Oleg Sokolsky, Insup Lee
The integration of machine learning (ML) into cyber-physical systems (CPS) offers significant benefits, including enhanced efficiency, predictive capabilities, real-time responsiveness, and the enabling of autonomous operations.
1 code implementation • 6 Nov 2023 • Pengyuan Lu, Matthew Cleaveland, Oleg Sokolsky, Insup Lee, Ivan Ruchkin
However, existing repair techniques do not preserve previously correct behaviors.
no code implementations • 28 Aug 2023 • Souradeep Dutta, Michele Caprio, Vivian Lin, Matthew Cleaveland, Kuk Jin Jang, Ivan Ruchkin, Oleg Sokolsky, Insup Lee
A particularly challenging problem in AI safety is providing guarantees on the behavior of high-dimensional autonomous systems.
no code implementations • 25 Apr 2023 • Mengyu Liu, Pengyuan Lu, Xin Chen, Fanxin Kong, Oleg Sokolsky, Insup Lee
We propose a model-free reinforcement learning solution, namely the ASAP-Phi framework, to encourage an agent to fulfill a formal specification ASAP.
no code implementations • 6 Apr 2023 • Pengyuan Lu, Ivan Ruchkin, Matthew Cleaveland, Oleg Sokolsky, Insup Lee
However, given the high diversity and complexity of LECs, it is challenging to encode domain knowledge (e. g., the CPS dynamics) in a scalable actual causality model that could generate useful repair suggestions.
no code implementations • 21 Feb 2023 • Ramneet Kaur, Xiayan Ji, Souradeep Dutta, Michele Caprio, Yahan Yang, Elena Bernardis, Oleg Sokolsky, Insup Lee
This can render the current OOD detectors impermeable to inputs lying outside the training distribution but with the same semantic information (e. g. training class labels).
1 code implementation • 20 Feb 2023 • Vivian Lin, Kuk Jin Jang, Souradeep Dutta, Michele Caprio, Oleg Sokolsky, Insup Lee
To aid in our estimates of Wasserstein distance, we employ dimensionality reduction through orthonormal projection.
no code implementations • 19 Feb 2023 • Michele Caprio, Souradeep Dutta, Kuk Jin Jang, Vivian Lin, Radoslav Ivanov, Oleg Sokolsky, Insup Lee
We show that CBDL is better at quantifying and disentangling different types of uncertainties than single BNNs, ensemble of BNNs, and Bayesian Model Averaging.
1 code implementation • 24 Jul 2022 • Ramneet Kaur, Kaustubh Sridhar, Sangdon Park, Susmit Jha, Anirban Roy, Oleg Sokolsky, Insup Lee
Machine learning models are prone to making incorrect predictions on inputs that are far from the training distribution.
1 code implementation • 13 Jun 2022 • Kaustubh Sridhar, Souradeep Dutta, Ramneet Kaur, James Weimer, Oleg Sokolsky, Insup Lee
Algorithm design of AT and its variants are focused on training models at a specified perturbation strength $\epsilon$ and only using the feedback from the performance of that $\epsilon$-robust model to improve the algorithm.
no code implementations • 22 May 2022 • Shuo Li, Xiayan Ji, Edgar Dobriban, Oleg Sokolsky, Insup Lee
Anomaly detection is essential for preventing hazardous outcomes for safety-critical applications like autonomous driving.
no code implementations • 7 Jan 2022 • Ramneet Kaur, Susmit Jha, Anirban Roy, Sangdon Park, Edgar Dobriban, Oleg Sokolsky, Insup Lee
We propose the new method iDECODe, leveraging in-distribution equivariance for conformal OOD detection.
1 code implementation • 3 Nov 2021 • Ivan Ruchkin, Matthew Cleaveland, Radoslav Ivanov, Pengyuan Lu, Taylor Carpenter, Oleg Sokolsky, Insup Lee
To predict safety violations in a verified system, we propose a three-step confidence composition (CoCo) framework for monitoring verification assumptions.
no code implementations • 13 Aug 2021 • Ramneet Kaur, Susmit Jha, Anirban Roy, Sangdon Park, Oleg Sokolsky, Insup Lee
We demonstrate the difference in the detection ability of these techniques and propose an ensemble approach for detection of OODs as datapoints with high uncertainty (epistemic or aleatoric).
1 code implementation • 3 Jun 2021 • Kaustubh Sridhar, Oleg Sokolsky, Insup Lee, James Weimer
Improving adversarial robustness of neural networks remains a major challenge.
no code implementations • 23 Mar 2021 • Ramneet Kaur, Susmit Jha, Anirban Roy, Oleg Sokolsky, Insup Lee
Deep neural networks (DNNs) are known to produce incorrect predictions with very high confidence on out-of-distribution (OOD) inputs.
no code implementations • 10 Oct 2017 • Gregor Gössler, Oleg Sokolsky, Jean-Bernard Stefani
In this position paper we discuss three main shortcomings of existing approaches to counterfactual causality from the computer science perspective, and sketch lines of work to try and overcome these issues: (1) causality definitions should be driven by a set of precisely specified requirements rather than specific examples; (2) causality frameworks should support system dynamics; (3) causality analysis should have a well-understood behavior in presence of abstraction.
no code implementations • 26 Aug 2016 • Gregor Gössler, Oleg Sokolsky
The keynote by Hana Chockler (King's College) provided a broad perspective on the application of causal reasoning based on Halpern and Pearl's definitions of actual causality to a variety of application domains ranging from formal verification to legal reasoning.