Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 122 for “"Safety analysis"”.
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Satellite System Safety Analysis Using STPA
Traditional hazard analysis techniques based on failure models of accident causality, such as the probabilistic risk assessment (PRA) method currently used at NASA, are inadequate for analyzing safety at the system level. System-Theoretic Accident Model and Processes (STAMP) shifts the focus of …
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Tuning Up BIM for Safety Analysis
… industries. This justifies the importance of safety research in this industry. Review of the literature identified "falls" as the top mortality source in the construction industry. Therefore, this research focuses on falls from heights. Conventional safety practices have held designers …
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Safety Analysis of Human Car-following Models
… goal of zero fatality on the road. A thorough safety analysis is mandatory as a system failure can result in serious injuries and even loss of lives, and simulation is extensively used for this purpose. The simulation requires the consideration of human drivers in the system as the future …
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Architecture Reference Models for Early Safety Analysis
Simply put, my work is as much about Simplex as it is about describing Simplex architectures. This dissertation provides a collection of precise, logical descriptions of the Simplex architecture in four different modeling paradigms. I also describe my implementation of a Simplex architecture in a …
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A system safety analysis of tomographic treatment
… and regulators, causes problems that the current safety engineering techniques are inadequate to prevent, which can result in tragic medical accidents. Therefore, it is important to apply new approaches to ensure the system safety of medical devices. This thesis compares Failure Mode and Effect …
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Integrated application of compositional and behavioural safety analysis
To address challenges arising in the safety assessment of critical engineering systems, research has recently focused on automating the synthesis of predictive models of system failure from design representations. In one approach, known as compositional safety analysis, system failure models such …
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Safety analysis of freeway interchange speed change lane facilities
… cause crashes is critical to improve traffic safety within the entrance and exit speed change lanes. This study uses two approaches to better understand crash causation within the entrance and exit speed change lanes. The first approach uses SHRP2 Naturalistic Driving Study (NDS) data, which …
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Enhanced method for the support of experiment safety analysis
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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Nationwide Pedestrian Safety Analysis Using Crash and Survey Data
Pedestrian safety is studied using two approaches: injury severity modeling using NHTSA’s Crash Report Sampling System crash data and administering a nationwide survey on roadway safety topics. The crash data models identified seven significant independent variables which relate to severe …
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System-Theoretic Safety Analysis for Teams of Collaborative Controllers
… to model, analyze, design, and assure their safety. As such, few have been fielded in safety-critical domains like aerospace. To address this gap, this work develops a rigorous and systematic approach to analyze safety and enable safety-guided design of systems that exhibit collaborative …
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A novel safety analysis method for marine cyber-physical systems
… a systems category expected to enhance the safety and improve the efficiency of maritime operations. However, new challenges due to the CPSs complexity are also anticipated leading to an unpredictable system behaviour, thus jeopardising safety.This thesis aims at developing a novel safety …
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Safety analysis of a compact integral small light water reactor
… cost. This work first assesses the transient analysis of a compact integral small light water reactor to examine its safety performance. Subsequently, a parametric optimization study with the goal of increasing its power density (i.e. improve its market competitiveness) while maintaining …
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Automated safety analysis of construction site activities using spatio-temporal data
… US. This is partially attributed to ineffective safety management strategies, specifically lack of automated construction equipment and worker monitoring. Currently, worker safety performance is measured and recorded manually, assessed subjectively, and the resulting performance information is …
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A Safety Analysis of Left-Turning Maneuvers for Long-Combination Vehicles
… road travel. Questions remain regarding their safety due to their larger size and wider maneuvering. This thesis furthers our understanding of LCV safety considerations in last-mile areas during left-turning maneuvers by focusing on conflicts with infrastructure and road users. Intersections …
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Advancement and verification of Moltres for molten salt reactor safety analysis
Molten salt reactors, a class of advanced nuclear reactors, promise numerous improvements over the current fleet of largely light-water reactors. As the world continues its transition towards low-carbon electricity generation to combat climate change, building molten salt reactors is a potential …
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Safety analysis of TCAS on Global Hawk using airspace encounter models
The U.S. Air Force's RQ-4 Global Hawk unmanned aerial vehicle (UAV) is a high altitude, long endurance aircraft used for surveillance and reconnaissance. Because of the potential for close proximity to manned aircraft in civil airspace, collision avoidance is a major concern, and the Air Force is …
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A partial implementation of a modular system for software safety analysis
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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Dynamic model-based safety analysis: from state machines to temporal fault trees
… (e.g. total failure of the system). For the safety assessment though, the SM failure behavioural models need to be converted to analysis models like Generalised Stochastic Petri Nets (GSPNs), Markov Chains (MCs) or Fault Trees (FTs). This is particularly important if the transformed models …
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Advancing Large-Scale Traffic Safety Analysis with Sociodemographic and High-Resolution Probe Data
Traffic safety is a fundamental research theme in transportation engineering, involving influences and interactions among infrastructure, users, as well as transportation policy and management, which can be particularly complex from a perspective of large-scale transportation systems. In recent …
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