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 30 for “"Reliable Systems"”.
-
Advanced data bus architecture using CDMA for highly reliable systems
Conventional fault-tolerant architectures require extensive cross-strapping of redundant modules. The purpose of this thesis is to prove the feasibility of the use of code division multiple access (CDMA) to permit shared data bus architecture for fault-tolerant applications. Four families of …
-
The Effects of Operator Trust, Complacency Potential, and Task Complexity on Monitoring a Highly Reliable Automated System
… implementation of automation in complex systems. However, the increase in quantity and complexity of advanced automated systems has raised a number of potential concerns including degraded monitoring skills. The present investigation consisted of two studies that assessed the impact of …
-
Accurate characterization of nanophotonic grating structures
… engine to the user. This thesis develops two reliable systems to qualify manufactured waveguides. The first system determines grating quality by measuring grating pitch and orientation uniformity across grating regions. The system uses scatterometry in Littrow configuration and captures both …
-
Reliability prediction techniques.
… and mean time to first failure of complex systems. The need for these methods, is a result of recent advances in pure materials technology and fabrication procedures, that potentially lead to more reliable systems. In this thesis, two types of complex systems are considered. Chapter I, …
-
Radio Wave Propagation Measurements and Modeling for Land Mobile Satellite Systems
… System designers should have the most reliable information about the statistics of the propagation channel to build reliable systems that can compensate for bad propagation conditions. In 1998, the Virginia Tech Antenna Group developed a simulator, PROSIM, to simulate a propagation …
-
Making Digital Libraries Flexible, Scalable and Reliable: Reengineering the MARIAN System in JAVA
… libraries that are flexible, scalable, and reliable. Few such systems exist. Little is known about how to build them. This thesis addresses these problems by enhancing a prototype digital library system with the aim of making it more flexible, scalable, and reliable. We hypothesize that: 1) …
-
Investigating the Effects of the Mission Status Graphics Polar Star Display on Failure Detection Time and Situation Awareness for Mission and System Monitoring in General Aviation Aircraft
… humans are notoriously poor monitors of reliable systems over time. However, research is currently being conducted into a new form of display that has the ability to group a myriad of aircraft mission and system status information onto one display, thereby providing pilots with a clear …
-
More than a river: using nature for reform in the progressive era
… for social order, business expansion, and reliable systems of investment and return. These social reform efforts, however, faltered and created new kinds of conflicts that justified and necessitated continued government intervention in society and business in the name of progress
-
Reliable Inference from Unreliable Agents
… this thesis is to analyze distributed inference systems with potentially unreliable components and design strategies to ensure reliable inference in such systems. The inference process can be that of detection or estimation or classification, and the components/agents in the system can be sensors …
-
Analysis and modelling of the impact of anomalous propagation on terrestrial microwave links in a subtropical region, based on long-term measurements. Statistical analysis of long-term meteorological and signal strength measurements in a subtropical region and investigation of the impact of anomalous refractivity profiles on radio propagation in terrestrial microwave wireless systems
… a vital role in deciding terrestrial wireless systems performance. Vertical refractivity profile below 1 km is a critical parameter for designing reliable systems; noting that there is a shortage of upper-air data worldwide. Anomalous phenomena may cause severe signal fading and interference …
-
Verifying a concurrent, crash-safe file system with sequential reasoning
Critical systems software such as the file system is challenging to make correct due to the combination of concurrency in the implementation for good performance and the requirement to preserve data even on crash, where the whole computer stops and reboots unexpectedly. To build reliable systems, …
-
An orthogonal framework for fault tolerance composition in software systems
Building reliable systems is one of the major challenges faced by software developers as society is becoming more dependent on software systems. The failure of any system can lead to a serious loss, for example serious injury or death in case of safety critical systems and significant financial …
-
The analysis and synthesis of dependable digital systems.
… some of the established techniques for reliable systems design are considered and evaluated. The particular advantage and disadvantages of each of these schemes are discussed and compared, and the relative merits of each are emphasised. New models for the evaluation of the schemes are …
-
Towards an embedded real-time Java virtual machine
… software techniques for a rapid development of reliable systems. However, languages and run-time platforms for embedded systems have not kept up with the front line of language development. Reasons include complex and, in some cases, contradictory requirements on timing, concurrency, …
-
Learning deformable models for tracking human motion
… pattern recognition. In order to build fast and reliable systems some kind of prior model is generally required. A model enables the system to cope with situations where there is considerable background clutter or where information is missing from the image data. This may be due to imaging errors …
-
Self-stabilizing sorting algorithms
… number of moves; The traditional way of creating reliable systems is to make redundant components. Self-stabilization allows systems to be fault tolerant through software as well. This is an evolving paradigm in the design of robust distributed systems. The ability to recover spontaneously from an …
-
Measuring and predicting radiation-induced soft errors in microprocessors
… the soft error rate is important in designing reliable systems for the terrestrial or space radiation environment. Inexpensive, but powerful, Raspberry Pi™ computers without radiation hardening, mitigation, or testing have found their way onto the International Space Station and into …
-
Coding approaches to fault tolerance in dynamic systems
… applications, and also enables the design of reliable systems out of unreliable, less expensive components. This thesis discusses fault tolerance in dynamic systems, such as finite-state controllers or computer simulations, whose internal state influences their future behavior. Modular …
-
Adaptive systems for DDoS attacks detection and mitigation in IoT networks
… and the need for lightweight, optimized, and reliable systems. This thesis addresses these challenges through five objectives aimed at adaptive DDoS detection and mitigation systems for IoT networks, balancing accuracy, resource efficiency, and adaptability. The first objective focuses on …
-
An Integrated Risk Analysis Methodology in a Multidisciplinary Design Environment
<p>Design of complex, one-of-a-kind systems, such as space transportation systems, is characterized by high uncertainty and, consequently, high risk. It is necessary to account for these uncertainties in the design process to produce systems that are more reliable. Systems designed by including …
Page 1 of 2