Experience

Publications

• Solid-Fuel Regression Rate Modeling for Hybrid Rockets

  Journal of Power and Propulsion

• Solid-Fuel Regression Rate Modeling for Hybrid Rockets

  Journal of Power and Propulsion

• Software contributions to aircraft adverse events: Case studies and analyses of recurrent accident patterns and failure mechanisms

  Reliability Engineering and System Safety

• Solid-Fuel Regression Rate Modeling for Hybrid Rockets

  Journal of Power and Propulsion

• Software contributions to aircraft adverse events: Case studies and analyses of recurrent accident patterns and failure mechanisms

  Reliability Engineering and System Safety

• Accident precursors, near misses, and warning signs: Critical review and formal definitions within the framework of Discrete Event Systems

  Reliability Engineering and System Safety - Elsevier

  An important consideration in safety analysis and accident prevention is the identification of and response to accident precursors. These off-nominal events are opportunities to recognize potential accident pathogens, identify overlooked accident sequences, and make technical and organizational decisions to address them before further escalation can occur. In this work, we develop a formal (mathematical) definition of accident precursors as truncated accident sequences within the modeling framework of Discrete Event Systems. Additionally, we examine the related notions of “accident pathogens” as static or lurking adverse conditions that can contribute to or aggravate an accident, as well as “near misses”, “warning signs” and the novel concept of “accident pathway”.

• Solid-Fuel Regression Rate Modeling for Hybrid Rockets

  Journal of Power and Propulsion

• Software contributions to aircraft adverse events: Case studies and analyses of recurrent accident patterns and failure mechanisms

  Reliability Engineering and System Safety

• Accident precursors, near misses, and warning signs: Critical review and formal definitions within the framework of Discrete Event Systems

  Reliability Engineering and System Safety - Elsevier

  An important consideration in safety analysis and accident prevention is the identification of and response to accident precursors. These off-nominal events are opportunities to recognize potential accident pathogens, identify overlooked accident sequences, and make technical and organizational decisions to address them before further escalation can occur. In this work, we develop a formal (mathematical) definition of accident precursors as truncated accident sequences within the modeling framework of Discrete Event Systems. Additionally, we examine the related notions of “accident pathogens” as static or lurking adverse conditions that can contribute to or aggravate an accident, as well as “near misses”, “warning signs” and the novel concept of “accident pathway”.

• Autonomous Vehicles Disengagements: Trends, Triggers, and Regulatory Limitations

  Accident Analysis and Prevention

• Solid-Fuel Regression Rate Modeling for Hybrid Rockets

  Journal of Power and Propulsion

• Software contributions to aircraft adverse events: Case studies and analyses of recurrent accident patterns and failure mechanisms

  Reliability Engineering and System Safety

• Accident precursors, near misses, and warning signs: Critical review and formal definitions within the framework of Discrete Event Systems

  Reliability Engineering and System Safety - Elsevier

  An important consideration in safety analysis and accident prevention is the identification of and response to accident precursors. These off-nominal events are opportunities to recognize potential accident pathogens, identify overlooked accident sequences, and make technical and organizational decisions to address them before further escalation can occur. In this work, we develop a formal (mathematical) definition of accident precursors as truncated accident sequences within the modeling framework of Discrete Event Systems. Additionally, we examine the related notions of “accident pathogens” as static or lurking adverse conditions that can contribute to or aggravate an accident, as well as “near misses”, “warning signs” and the novel concept of “accident pathway”.

• Autonomous Vehicles Disengagements: Trends, Triggers, and Regulatory Limitations

  Accident Analysis and Prevention

• Observability-in-depth: an essential complement to the defense-in-depth safety strategy in the nuclear industry

  Nuclear Engineering Technology

• Solid-Fuel Regression Rate Modeling for Hybrid Rockets

  Journal of Power and Propulsion

• Software contributions to aircraft adverse events: Case studies and analyses of recurrent accident patterns and failure mechanisms

  Reliability Engineering and System Safety

• Accident precursors, near misses, and warning signs: Critical review and formal definitions within the framework of Discrete Event Systems

  Reliability Engineering and System Safety - Elsevier

  An important consideration in safety analysis and accident prevention is the identification of and response to accident precursors. These off-nominal events are opportunities to recognize potential accident pathogens, identify overlooked accident sequences, and make technical and organizational decisions to address them before further escalation can occur. In this work, we develop a formal (mathematical) definition of accident precursors as truncated accident sequences within the modeling framework of Discrete Event Systems. Additionally, we examine the related notions of “accident pathogens” as static or lurking adverse conditions that can contribute to or aggravate an accident, as well as “near misses”, “warning signs” and the novel concept of “accident pathway”.

• Autonomous Vehicles Disengagements: Trends, Triggers, and Regulatory Limitations

  Accident Analysis and Prevention

• Observability-in-depth: an essential complement to the defense-in-depth safety strategy in the nuclear industry

  Nuclear Engineering Technology

• Software in military aviation and drone mishaps: Analysis and recommendations for the investigation process

  Reliability Engineering and System Safety

• Solid-Fuel Regression Rate Modeling for Hybrid Rockets

  Journal of Power and Propulsion

• Software contributions to aircraft adverse events: Case studies and analyses of recurrent accident patterns and failure mechanisms

  Reliability Engineering and System Safety

• Accident precursors, near misses, and warning signs: Critical review and formal definitions within the framework of Discrete Event Systems

  Reliability Engineering and System Safety - Elsevier

  An important consideration in safety analysis and accident prevention is the identification of and response to accident precursors. These off-nominal events are opportunities to recognize potential accident pathogens, identify overlooked accident sequences, and make technical and organizational decisions to address them before further escalation can occur. In this work, we develop a formal (mathematical) definition of accident precursors as truncated accident sequences within the modeling framework of Discrete Event Systems. Additionally, we examine the related notions of “accident pathogens” as static or lurking adverse conditions that can contribute to or aggravate an accident, as well as “near misses”, “warning signs” and the novel concept of “accident pathway”.

• Autonomous Vehicles Disengagements: Trends, Triggers, and Regulatory Limitations

  Accident Analysis and Prevention

• Observability-in-depth: an essential complement to the defense-in-depth safety strategy in the nuclear industry

  Nuclear Engineering Technology

• Software in military aviation and drone mishaps: Analysis and recommendations for the investigation process

  Reliability Engineering and System Safety

• Examining Accident Reports Involving Autonomous Vehicles in California

  Plos One

• Solid-Fuel Regression Rate Modeling for Hybrid Rockets

  Journal of Power and Propulsion

• Software contributions to aircraft adverse events: Case studies and analyses of recurrent accident patterns and failure mechanisms

  Reliability Engineering and System Safety

• Accident precursors, near misses, and warning signs: Critical review and formal definitions within the framework of Discrete Event Systems

  Reliability Engineering and System Safety - Elsevier

  An important consideration in safety analysis and accident prevention is the identification of and response to accident precursors. These off-nominal events are opportunities to recognize potential accident pathogens, identify overlooked accident sequences, and make technical and organizational decisions to address them before further escalation can occur. In this work, we develop a formal (mathematical) definition of accident precursors as truncated accident sequences within the modeling framework of Discrete Event Systems. Additionally, we examine the related notions of “accident pathogens” as static or lurking adverse conditions that can contribute to or aggravate an accident, as well as “near misses”, “warning signs” and the novel concept of “accident pathway”.

• Autonomous Vehicles Disengagements: Trends, Triggers, and Regulatory Limitations

  Accident Analysis and Prevention

• Observability-in-depth: an essential complement to the defense-in-depth safety strategy in the nuclear industry

  Nuclear Engineering Technology

• Software in military aviation and drone mishaps: Analysis and recommendations for the investigation process

  Reliability Engineering and System Safety

• Examining Accident Reports Involving Autonomous Vehicles in California

  Plos One

• Towards Risk Analysis 2.0: Safety Supervisory Control and Model-Based Hazard Monitoring for Risk-Informed Safety Interventions

  Reliability Engineering and System Safety

• Solid-Fuel Regression Rate Modeling for Hybrid Rockets

  Journal of Power and Propulsion

• Software contributions to aircraft adverse events: Case studies and analyses of recurrent accident patterns and failure mechanisms

  Reliability Engineering and System Safety

• Accident precursors, near misses, and warning signs: Critical review and formal definitions within the framework of Discrete Event Systems

  Reliability Engineering and System Safety - Elsevier

  An important consideration in safety analysis and accident prevention is the identification of and response to accident precursors. These off-nominal events are opportunities to recognize potential accident pathogens, identify overlooked accident sequences, and make technical and organizational decisions to address them before further escalation can occur. In this work, we develop a formal (mathematical) definition of accident precursors as truncated accident sequences within the modeling framework of Discrete Event Systems. Additionally, we examine the related notions of “accident pathogens” as static or lurking adverse conditions that can contribute to or aggravate an accident, as well as “near misses”, “warning signs” and the novel concept of “accident pathway”.

• Autonomous Vehicles Disengagements: Trends, Triggers, and Regulatory Limitations

  Accident Analysis and Prevention

• Observability-in-depth: an essential complement to the defense-in-depth safety strategy in the nuclear industry

  Nuclear Engineering Technology

• Software in military aviation and drone mishaps: Analysis and recommendations for the investigation process

  Reliability Engineering and System Safety

• Examining Accident Reports Involving Autonomous Vehicles in California

  Plos One

• Towards Risk Analysis 2.0: Safety Supervisory Control and Model-Based Hazard Monitoring for Risk-Informed Safety Interventions

  Reliability Engineering and System Safety

• Application of Temporal Logic for Safety Supervisory Control and Model-Based Hazard Monitoring

  Reliability Engineering and System Safety

• Solid-Fuel Regression Rate Modeling for Hybrid Rockets

  Journal of Power and Propulsion

• Software contributions to aircraft adverse events: Case studies and analyses of recurrent accident patterns and failure mechanisms

  Reliability Engineering and System Safety

• Accident precursors, near misses, and warning signs: Critical review and formal definitions within the framework of Discrete Event Systems

  Reliability Engineering and System Safety - Elsevier

  An important consideration in safety analysis and accident prevention is the identification of and response to accident precursors. These off-nominal events are opportunities to recognize potential accident pathogens, identify overlooked accident sequences, and make technical and organizational decisions to address them before further escalation can occur. In this work, we develop a formal (mathematical) definition of accident precursors as truncated accident sequences within the modeling framework of Discrete Event Systems. Additionally, we examine the related notions of “accident pathogens” as static or lurking adverse conditions that can contribute to or aggravate an accident, as well as “near misses”, “warning signs” and the novel concept of “accident pathway”.

• Autonomous Vehicles Disengagements: Trends, Triggers, and Regulatory Limitations

  Accident Analysis and Prevention

• Observability-in-depth: an essential complement to the defense-in-depth safety strategy in the nuclear industry

  Nuclear Engineering Technology

• Software in military aviation and drone mishaps: Analysis and recommendations for the investigation process

  Reliability Engineering and System Safety

• Examining Accident Reports Involving Autonomous Vehicles in California

  Plos One

• Towards Risk Analysis 2.0: Safety Supervisory Control and Model-Based Hazard Monitoring for Risk-Informed Safety Interventions

  Reliability Engineering and System Safety

• Application of Temporal Logic for Safety Supervisory Control and Model-Based Hazard Monitoring

  Reliability Engineering and System Safety

• Texas City refinery accident: Case study in breakdown of defense-in-depth and violation of the safety–diagnosability principle in design

  Engineering Failure Analysis

  n this work, we first examine the accident pathogens or lurking adverse conditions at the refinery prior to the accident. We then analyze the sequence of events that led to the explosion, and we highlight some of the provisions for the implementation of defense-in-depth and their failures. Next we identify a fundamental failure mechanism in this accident, namely the absence of observability or ability to diagnose hazardous states in the operation of the refinery, in particular within the raffinate splitter tower and the blowdown drum of the isomerization unit. We propose a general safety–diagnosability principle for supporting accident prevention, which requires that all safety-degrading events or states that defense-in-depth is meant to protect against be diagnosable, and that breaches of safety barriers be unambiguously monitored and reported.

• Solid-Fuel Regression Rate Modeling for Hybrid Rockets

  Journal of Power and Propulsion

• Software contributions to aircraft adverse events: Case studies and analyses of recurrent accident patterns and failure mechanisms

  Reliability Engineering and System Safety

• Accident precursors, near misses, and warning signs: Critical review and formal definitions within the framework of Discrete Event Systems

  Reliability Engineering and System Safety - Elsevier

  An important consideration in safety analysis and accident prevention is the identification of and response to accident precursors. These off-nominal events are opportunities to recognize potential accident pathogens, identify overlooked accident sequences, and make technical and organizational decisions to address them before further escalation can occur. In this work, we develop a formal (mathematical) definition of accident precursors as truncated accident sequences within the modeling framework of Discrete Event Systems. Additionally, we examine the related notions of “accident pathogens” as static or lurking adverse conditions that can contribute to or aggravate an accident, as well as “near misses”, “warning signs” and the novel concept of “accident pathway”.

• Autonomous Vehicles Disengagements: Trends, Triggers, and Regulatory Limitations

  Accident Analysis and Prevention

• Observability-in-depth: an essential complement to the defense-in-depth safety strategy in the nuclear industry

  Nuclear Engineering Technology

• Software in military aviation and drone mishaps: Analysis and recommendations for the investigation process

  Reliability Engineering and System Safety

• Examining Accident Reports Involving Autonomous Vehicles in California

  Plos One

• Towards Risk Analysis 2.0: Safety Supervisory Control and Model-Based Hazard Monitoring for Risk-Informed Safety Interventions

  Reliability Engineering and System Safety

• Application of Temporal Logic for Safety Supervisory Control and Model-Based Hazard Monitoring

  Reliability Engineering and System Safety

• Texas City refinery accident: Case study in breakdown of defense-in-depth and violation of the safety–diagnosability principle in design

  Engineering Failure Analysis

  n this work, we first examine the accident pathogens or lurking adverse conditions at the refinery prior to the accident. We then analyze the sequence of events that led to the explosion, and we highlight some of the provisions for the implementation of defense-in-depth and their failures. Next we identify a fundamental failure mechanism in this accident, namely the absence of observability or ability to diagnose hazardous states in the operation of the refinery, in particular within the raffinate splitter tower and the blowdown drum of the isomerization unit. We propose a general safety–diagnosability principle for supporting accident prevention, which requires that all safety-degrading events or states that defense-in-depth is meant to protect against be diagnosable, and that breaches of safety barriers be unambiguously monitored and reported.

• System safety principles: A multidisciplinary engineering perspective

  Journal of Loss Prevention in the Process Industries

  In this work, we propose a set of five safety principles, which are domain-independent, technologically agnostic, and broadly applicable across industries. While there is a proliferation of detailed safety measures (tactics) in specific areas and industries, a synthesis of high-level safety principles or strategies that are independent of any particular instantiation, and from which specific safety measures can be derived or related to, has pedagogical value and fulfills an important role in safety training and education. Such synthesis effort also supports creativity and technical ingenuity in the workforce for deriving specific safety measures, and for implementing these principles and handling specific local or new risks.