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 174 for “"Dependability"”.
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Experimental study of software dependability
… software systems. The factors that influence the dependability of software systems include software faults and hardware faults. To improve software dependability, it is necessary to understand the characteristics of these faults and how they affect software systems. In this study, a distributed …
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Software dependability in the operational phase
… cycle, which requires understanding of software dependability in actual environments. This thesis discusses how to develop analysis techniques for evaluating the dependability of operational software using real measurements while taking design issues into account. The issues addressed include …
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Building dependability arguments for software intensive systems
… and guiding the development of end-to-end dependability arguments. The goal is to establish high-level requirements of complex software-intensive systems, especially properties that cross-cut normal functional decomposition. The resulting argument documents and validates the justification …
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Diagnosing runtime violations of security and dependability properties
Monitoring the preservation of security and dependability (S&D) properties of complex software systems is widely accepted as a necessity. Basic monitoring can detect violations but does not always provide sufficient information for deciding what the appropriate response to a violation is. Such …
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Hierarchical Simulation to Assess Hardware and Software Dependability
… the simulation method can be used to improve the dependability of the target system. The simulation analysis was used to add recovery to the target software for the most common fault propagation mechanisms that would cause the software to hang. After the modification, the number of hangs was …
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Implementation of the Security-Dependability Adaptive Voting Scheme
… voting scheme, used to alter the security/dependability balance of protection schemes. It is argued that as power system conditions change, the ability of protection relays to adjust the security/dependability balance based on those conditions can allow relays to play a part in preventing …
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Dependability where the mobile world meets the enterprise world
… 2014). In this dissertation, we investigate the dependability aspects of two of the most prevalent computing platforms today, namely, smartphones and cloud computing. These two seemingly disparate platforms are part of a cohesive story—they interact to provide end-to-end services which are …
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Speculation-Based Distributed *Simulation for Dependability and Performance Analysis
… SAN) to improve the network interface software dependability. The detection and recovery focuses on memory faults that corrupt network interface software. The techniques proposed are by no means limited to ServerNet architecture, it is useful to the recovery of the new generation …
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System Support for Improving Software Dependability During Production Runs
In summary, it can effectively improve software dependability during production runs by addressing software bugs at multiple levels with support from the hardware, OS, and runtime.
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Measurement-Based Dependability Analysis and Modeling for Multicomputer Systems
… research addresses issues in measurement-based dependability analysis, modeling and evaluation for multicomputer systems. Measurements are made on two DEC VAXclusters for substantial periods to collect error data. Dependability analysis, modeling and evaluation are performed based on these data. …
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A hybrid fault injection environment for measuring system dependability
… test environment for evaluating computer system dependability, wherein faults are injected via software and the impact is measured by both software and hardware. The hybrid nature of the environment provides advantages in that it introduces minimal perturbation and provides a high degree of …
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Dependability of IT Systems in Emergency Situations – Theory and Practice
… on IT systems increases, evaluating the dependability of critical IT systems becomes more important. One of the main challenges in software reliability engineering is the sensitivity of software systems to a changing usage. This is especially important for systems that are critical in the …
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Automated Fault-Injection-Based Dependability Analysis of Distributed Computer Systems
NFTAPE is different from other fault-injection tools in that it separates the components that inject faults or trigger faults (called Lightweight Fault Injectors or Lightweight Triggers) from the rest of the tool. Though this is a simple change, it substantially improves our ability to analyze …
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SMARTGUIDE: Revolutionizing the Depth and Dependability of Vision-Impaired Navigation
Globally, over 2.2 billion people face vision impairment, necessitating innovative solutions for safe, independent navigation. Traditional aids like canes, guide dogs, and GPS offer basic support but lack the sophistication to provide contextual understanding, precise navigation, or real-time …
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Quantitative dependability and interdependency models for large-scale cyber-physical systems
… of this research is quantitative modeling of dependability attributes -- including reliability and survivability -- of cyber-physical systems, with domain-specific case studies on smart grids and intelligent water distribution networks. To this end, we make the following research …
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The Impact of Rogue Nodes on the Dependability of Opportunistic Networks
… pattern and mobility of a rogue nodes impact the dependability and overall "Average Latency" in an Opportunistic Network Environment. We have simulated a subset of the mathematical modeling performed in a previous publication in this regard. Ad hoc networks are very challenging to model due to …
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Generalizabiity and dependability of brief behavior rating scales for social skills
… effects. This affected generalizability and dependability coefficients to the extent that reliable decisions could not be made with the current scale using feasible assessment conditions. Furthermore, current results did not support the abbreviation of the current scales. These finding …
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Assessing dependability of emergent large-scale autonomous systems in the wild
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01
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A Framework for Dependability analysis of software systems with trusted bases
… this activity. A notation is used to construct a dependability argument that explains how the system satisfies critical requirements. The framework provides a set of analysis techniques for checking the soundness of an argument, identifying the members of a trusted base, and illustrating the …
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Electromagnetic Risk Management for Dependability of Road Vehicles using Discrete Bayesian Networks
… the more recently developed interests in other dependability aspects e.g., cybersecurity. From the system assessor’s perspective, functional safety issues caused by EMI have mostly been believed to be handled by legislative EMC measures. However, this position is highly questionable for systems …
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