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.
Results
Showing 1 to 20 of 40 for “"systems safety"”.
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Application of regression techniques to highway systems safety
… or decision maker in relationship to highway safety.
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Compositional analysis of networked cyber-physical systems: safety and privacy
Cyber-physical systems (CPS) are now commonplace in power grids, manufacturing, and embedded medical devices. Failures and attacks on these systems have caused significant social, environmental and financial losses. In this thesis, we develop techniques for proving invariance and privacy properties …
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The Effects of SMS Implementation on Safety Culture Within Helicopter Emergency Medical Services
Safety Management Systems (SMS) have now become regulation within FAR Part 121 operations with U.S. airports and FAR Part 135 operators coming next. An assessment of the implementation of voluntary SMS programs and their effects on safety culture within major U.S. Helicopter Air Ambulance (HAA) …
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Global optimization of hybrid systems
Systems that exhibit both discrete state and continuous state dynamics are called hybrid systems. In most nontrivial cases, these two aspects of system behavior interact to such a significant extent that they cannot be decoupled effectively by any kind of abstraction and must be analyzed …
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Uncertainty in Quantitative Risk Analysis - Characterisation and Methods of Treatment
… risk analyses, used in decision making in safety-related issues (for instance, in land use planning and licensing procedures for hazardous establishments and activities) are presented and discussed, together with the different types of uncertainty that are introduced in the various stages …
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Combustion Products from Fires - Influence from ventilation conditions
The production of combustion products is discussed, especially with respect to the influence of ventilation conditions. Results are presented and compared, from different experimental set-ups. Experimental techniques are presented and discussed.
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Risk and Vulnerability Analysis of Complex Systems: a basis for proactive emergency management
… the risks and vulnerabilities of complex systems in a societal emergency management context. Operational definitions of vulnerability and emergency response capabilities are suggested and two methods for analysing the vulnerability of critical infrastructure networks, based on the …
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Design for safety and energy efficiency of electrical power systems in ships
… identified the need for the ship and passengers safety, energy efficiency and environmental pollution to be considered as dominant issues within shipping industry and academia. Recently introduced safety regulations, known as Safe-Return-to-Port, and 'green' regulations, by the IMO, came into …
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A Comparison of Control Methods for Spacecraft Maneuvering With Run Time Assurance
In the vast subject of aerospace systems, safety is a critical factor in mission completion within the controls field. Controllers designed using data-based approaches like artificial intelligence must uphold the same levels of safety expected from modern controllers, such as Linear Quadratic …
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A Comparison of Control Methods for Spacecraft Maneuvering With Run Time Assurance
In the vast subject of aerospace systems, safety is a critical factor in mission completion within the controls field. Controllers designed using data-based approaches like artificial intelligence must uphold the same levels of safety expected from modern controllers, such as Linear Quadratic …
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The underestimated value of safety in achieving organizational goals : cast analysis off the Macondo accident
… and the complexity of the accident, several safety analyses have been proposed by the international community at different levels of the system involved in the accident. Most of these studies use accident analysis techniques based on chain-of-event models, whose main objective is to identify …
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Cyber safety : a systems thinking and systems theory approach to managing cyber security risks
… model for accident or incident analysis, used in Systems Safety field. The model is called System-Theoretic Accident Model and Processes (STAMP). It is rooted in Systems Thinking and Systems Theory. Based on a case study specifically written for this thesis, the largest cyber-attack reported in …
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Framework for the reduction of programmatic risk on complex systems projects
… schedule overruns. Defense projects are complex systems of humans, software, and hardware interacting in unpredictable and often-uncontrolled ways. The research presented in this thesis demonstrates that component and systemic failures in DoD systems have much in common with the overruns that …
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An exploration of the applicability and utility of fault tree analysis to the diffusion of technological innovation in educational systems
An operations technique used to analyze safety on aerospace projects and a descendant of the systems safety approach developed in the late 1950s and early 1960s, Fault Tree Analysis [FTA] examines systems in terms of potential failure. The purpose of the technique is to improve the likelihood of …
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Development of Safety Standards for CubeSat Propulsion Systems
… has begun to develop and implement propulsion systems. This movement represents a new capability which may satisfy mission needs such as orbital and constellation maintenance, formation flight, de-orbit, and even interplanetary travel. With the freedom and capability granted by propulsion …
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Evaluation and Mitigation of Industrial Fire Hazards
A tool suitable for conducting industrial fire and explosion hazard analysis is presented, together with an identification of weak links in the hazard evaluation chain. For some of the weak links additional research has been carried out. The tool, "FREIA", evaluates the consequences for humans and …
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Demand for Extinguishing Media in Manual Fire Fighting
… study has shown that it is possible to use fire safety engineering models to estimate the development of fires on a realistic scale, and the corresponding requirement for extinguishing media. Data from the London Fire Brigade (UK) were used to investigate a possible correlation between the area …
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On the Characteristics of Fires in Tunnels
Important phenomena related to tunnel fires are presented including both experimental and theoretical work. The main focus is on the large-scale fire tests performed in 2003, in the Runehamar tunnel in Norway. During these tests heat release rate (HRR), temperatures, gas concentrations (O2, CO2, …
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Uncertainty and Risk Analysis in Fire Safety Engineering
… equations would be preferable for fire safety design purposes. A method of deriving these design values, based on quantified risk, is presented and complemented with an example which provides design values for a class of buildings. When these design values are known, so-called partial …
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