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 19 of 19 for “"safety analyses"”.
-
Systems-theoretic safety analyses extended for coordination
… conditions exist among decision units, safety results in part from coordination. Safety analysis methods should correspondingly address coordination. However, state-of-the-art safety analysis methods have limited guidance for analytical inquiry into coordination between interdependent …
-
Safety Analyses At Signalized Intersections Considering Spatial, Temporal And Site Correlation
… for both intersection temporal and spatial analyses, which indicates that the correlation between the multiple observations for a certain intersection will decrease as the time-gap increase and for spatially correlated signalized intersections along corridors the correlation between …
-
Maximum hypothetical accident analysis for HEU to LEU fuel conversion at the University of Missouri Research Reactor
… 13 of NUREG-1573, MURR must perform several safety analyses, one of which was the maximum hypothetical accident (MHA) analysis. For the 10-minute dose to workers in containment, a committed effective dose equivalent (CEDE) to the thyroid from the radioiodines was 0.889 mrem. To calculate the …
-
Understanding Fixed Object Crashes with SHRP2 Naturalistic Driving Study Data
… have long time been considered as major roadway safety concerns. While previous relevant studies tended to address such crashes in the context of roadway departures, and heavily relied on police-reported accidents data, this study integrated the SHRP2 NDS and RID data for analyses, which fully …
-
An Effective Methodology for Thermal-Hydraulics Analysis of a VHTR Core and Fuel Elements
… uses. Extensive thermal-hydraulics and safety analyses of VHTRs are being conducted using Computational Fluid Dynamics (CFD) and heat transfer codes, in conjunction with experiments and prototype demonstrations. These analyses are challenging, largely due to the 3-D simulation of the …
-
A systems-based analysis method for safety design in rocket testing controllers
… low earth orbit. Due to the rigorous demands of safety on crew-rated spacecraft, the entire vehicle undergoes captive hot-fire testing before being delivered to NASA for actual flight operations. The hot-fire test is controlled by a suite of computers used to control the rocket segment and …
-
Systems Theoretic Process Analysis applied to an Offshore Supply Vessel dynamic positioning system
… the advantages that result from using this new safety analysis method compared to traditional techniques. To do this, STPA was used to analyze a case study involving Naval Offshore Supply Vessels (OSV) that incorporate software-intensive dynamic positioning in support of target vessel escort …
-
Satellite System Safety Analysis Using STPA
… used at NASA, are inadequate for analyzing safety at the system level. System-Theoretic Accident Model and Processes (STAMP) shifts the focus of safety from preventing failures to that of a dynamic feedback control system that enforces behavioral constraints. System-Theoretic Process …
-
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 …
-
Specification and use of component failure patterns
Safety-critical systems are typically assessed for their adherence to specified safety properties. They are studied down to the component-level to identify root causes of any hazardous failures. Most recent work with model-based safety analysis has focused on improving system modelling techniques …
-
Detection of safety signals in randomised controlled trials
… Committee to make decisions regarding the safety of a treatment and may lead to the alteration or discontinuation of a trial if real safety issues are detected. There are many different types of adverse event and the statistical analysis of this data, particularly with regard to hypothesis …
-
Experimental study of transient pool boiling heat transfer under exponential power excursion on plate-type heater
… reduce the uncertainty in both design and safety analyses of the research reactors especially under RIAs.
-
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 …
-
An inverted pressurized water reactor design with twisted-tape swirl promoters
… higher power rating is achievable although more safety analyses would be needed to confirm the feasibility of operating at power rating higher than the reference plant full power value.
-
Urban Expressway Safety and Efficiency Evaluation and Improvement using Big Data
… transportation. Operation efficiency and traffic safety have long been deemed as priorities among highway system performance measurement. While efficiency could be evaluated in terms of traffic congestion, safety is studied through crash analysis. Extensive works have been conducted to identify …
-
The economics of alternative fuel cycles on sodium-cooled fast reactors and uncertainty and sensitivity analysis of cost estimates
… to decrease the capital costs while maintaining safety and performance. This thesis expands on the capital cost model to include uncertainty analysis, as well as performing qualitative cost evaluations for the fuel cycle and O&M costs. An uncertainty model was developed from the available data …
-
Assessing Crash Occurrence On Urban Freeways Using Static And Dynamic Factors By Applying A System Of Interrelated Equations
… the main causes of death in the US, making road safety a high priority issue that needs urgent attention. Recognizing the fact that more and effective research has to be done in this area, this thesis aims mainly at developing different statistical models related to the road safety. The thesis …
-
Development of optimized core design and analysis methods for high power density BWRs
… utilizing a combination of active and passive safety systems. Safety analyses applied a void reactivity coefficient calculated by SIMULATE-3 for an equilibrium cycle core that showed a 15% less negative coefficient for the BWR-HD compared to the ABWR. The feedwater temperature was kept the same …
-
Comparative Effectiveness of Methotrexate-Based Disease-Modifying Antirheumatic Drug Combinations for Rheumatoid Arthritis
… the TNFi plus MTX. In addition, the comparative safety analyses found that the MTX combination treatment with DMARDs and DMARDs monotherapy had similar risk of CV, as compared to MTX monotherapy in patients with RA.