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 38 for “"Failure Scenarios"”.
-
Dynamic probabilistic network protection in large-scale failure scenarios
Large-scale failure resulting from natural disasters or intentional attacks is now considered a serious risk for communication network infrastructure. In these events, simultaneous damages in several links and nodes may cause substantial loss of information, which can be very costly for …
-
Design and evaluation of network survivability schemes for correlated multi-failure scenarios
… a central concern, as even a single link or node failure can cause widespread service disruption for thousands of users or more. Now over the years, a full range of network survivability schemes have been developed for packet routing and optical switching networks. Indeed, the open research …
-
Deployment considerations for intrusion detection systems in advanced metering infrastructure
… The threat analysis leads to an extensive set of failure scenarios that captures the attackers' key objectives and is used to extract the information required to effectively detect attacks. Using the information taken from the failure scenarios and knowledge of how encrypted communications can …
-
Performance models for parallel applications under failures
… to deal with hardware malfunctions and other failure scenarios during execution. The overall goal of this research is to get good performance of parallel applications despite failures. This dissertation introduces two mathematical models to improve resilience of parallel applications on two …
-
Efficient admission control and routing for resilient communication networks
… required flow blocking probability. In case of a failure, the affected traffic is rerouted over backup paths which increases the traffic rate on the respective links. To guarantee the effectiveness of admission control also in failure scenarios, the increased traffic rate must be taken into …
-
Automated verification of model-based programs under uncertainty
… must be robust to a large space of possible failure scenarios. This large state space poses difficulties for traditional scenario-based testing, leading to a need for new approaches to verification and validation. We propose a novel verification approach that generates an analysis of the most …
-
Multi-Agent System Based Energy Management Controller for Microgrids
… of the EM controller during controller failure scenarios. In addition to the resiliency, the EM controller is implemented with an acquisitive optimization problem which includes a penalty function for power interruption. This scheme is tested for different controller failure scenarios. …
-
OnBoard Parameter Identification for a Small UAV
… control laws, the availability of accurate post failure aircraft models improves performance. While look-up tables of aircraft models can be created for failure conditions, they may fail to account for all possible failure scenarios. Thus, a real-time parameter identification program eliminates …
-
Artificial Neural Network and Dynamic Probabilistic Risk Assessment for passive safety systems
… Assessment (PSA). ANNs were employed to predict failure probabilities of critical components, enabling accurate modeling of nonlinear interactions and complex failure scenarios that traditional methods might overlook. DPRA, implemented using the EMRALD tool, provided dynamic, time-dependent …
-
Engine placement for manned descent at Mars considering single engine failures
… interest because configurations that improve failure mitigation tend to be poorer for the other considerations. This thesis presents the development of a simulation of the descent phase of a manned landing at Mars, an overview of the effects of the various requirements on manned lander engine …
-
A Simulation Analysis of Bivariate Availability Models
… to 3 years old with 30,000 miles. Bivariate failure modeling provides a framework for studying system behavior as a function of two variables. This is meaningful when studying the reliability/availability of systems and equipment. This thesis extends work done in the area of bivariate failure …
-
Critical Node Analysis for Water Distribution System Using Flow Distribution
… nodes without hydraulic analysis of every failure scenario, applicable for any size WDS, incorporates critical infrastructure, and capable of verifying method accuracy. The Flow Distribution method is the application of the gravity model, typically used to predict traffic flows in …
-
Zorro: zero-cost reactive failure recovery in distributed graph processing
… either lack the ability to recovery from failures or support proactive recovery methods. Proactive recovery methods like checkpointing incur high overheads during failure-free execution making failure recovery an expensive operation. Our hypothesis is that reactive recovery of failures in …
-
Satellite Reorientation Using Reinforcement Learning Under Unknown Attitude Failure
… attitude determination and control system (ADCS) failures. When traditional fault-tolerant control methods cannot restore signal, the proposed RL controller acts as a last-resort measure by autonomously reorienting the satellite’s antenna toward Earth while charging the battery via solar panels. A …
-
In-Network Processing For Mission-Criticalwireless Networked Sensing And Control: A Real-Time, Efficiency, And Resiliency Perspective
… cost proactive protection against transient node failures in a more dynamic wireless environment.</p> <p>We first study the problem of jointly optimizing packet packing and the timeliness of data delivery. We identify the conditions under which the problem is strong NP-hard, and we find that the …
-
A GIS-Based Strategy for Managing Levee Simulation Data
… current levee conditions and predicting future failure scenarios, thus providing a path for further improving the safety of levees. The Levee Analyst is a new GIS data model and set of geoprocessing tools that make it possible to store and manipulate model data associated with seepage and slope …
-
Toward An Explainable Electric Power Grid Operation Assistant Using Large Language Models
… (L2RPN) benchmark for steady-state and cascading failure scenarios. While the LLM agents performed better in scenarios requiring exploratory decision-making, they struggled in steady-state operation and were constrained by their integration with tools and the testing environment. This work was …
-
Petri net modeling of fault analysis for probabilistic risk assessment
… it has been suggested that they could also model failure scenarios, and thus could be a potential modeling strategy for PRA. In this thesis, the transformations required to model logic gates in a fault tree by Petri nets are explored. The gap between fault tree analysis and Petri net analysis is …
-
Combating Corrosion and Monitoring Microgrids on Coast Guard Patrol Boats
… FRCs, this thesis identifies operational trends, failure modes, and unique regional behaviors. To validate observed patterns and explore failure scenarios, the study implements finite element modeling using COMSOL Multiphysics. These simulations replicate normal operation, reference electrode …
-
Networking from a network coding perspective
… approach to multi-source multicast network scenarios, in which one or more, possibly correlated, sources transmit common information to one or more receivers. This approach substantially widens the scope of applicability of network coding to three new areas. Firstly, we show that it achieves …
Page 1 of 2