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 73 for “"Commercial-off-the-shelf (COTS)"”.
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A Parallel Architecture for Analog-to-Digital Conversion with Improved Dynamic Range
In this thesis, a parallel architecture for Analog-to-Digital Converters (ADCs) is developed to increase the system dynamic range. The proposed architecture is a critical component for a Continuous Wave Stepped Frequency (CWSF) radar system. Existing Commercial Off-The-Shelf (COTS) components are …
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Mixed Control Moment Gyro and Momentum Wheel Attitude Control Strategies
… wheels are derived with nonlinear techniques. The control laws command the CMGs to provide rapid angular acceleration and the momentum wheels to reject tracking and initial condition errors. Numerical simulations of derived control laws are compared. A trend analysis is performed to examine the …
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A synchronous communication system for a software-based Byzantine fault tolerant computer
This thesis describes the redesign of a Byzantine-resilient, quad-redundant computer to remove proprietary hardware components. The basic architecture consists of four Commercial Off-The-Shelf (COTS) processors in a completely-connected network of point-to-point ethernet connections. In particular, …
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Light-PREM: automatically transforming existing applications to the Predictable Execution Model
… real-time embedded systems become more complex, there is a desire to use these systems on higher performance commercial off-the-shelf (COTS) components. However, worst case execution times (WCET) are unreasonably high on these components, due to contention amongst resources. Past work has …
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APIS : a real-time message-oriented middleware
This thesis presents an investigation and evaluation of a Real-Time Message-Oriented Middleware (MOM) implementation using commercial off-the-shelf (COTS) software components. The Application Interface Services (APIS) is an implementation of a real-time MOM that provides network services to …
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On exploiting human domain workflows in cyber-physical systems
In this thesis, we describe a general methodology for enhancing sensing accuracy in cyber-physical systems that involve human domain workflows in noisy physical environment. A novel workflow-aware sensing model is proposed to jointly correct unreliable sensor data and keep track of states in a …
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Design of a standardized sensor platform for a C-130 aircraft
The development of a standardized sensor pallet system for a C-130 aircraft was conceived by the National Guard to assist in counterdrug reconnaissance activities within the United States. Before development, the design parameters were established by the National Guard mission requirements and by …
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Trusted and high assurance systems
… security) systems require strict limitation of the interactions between different security compartments based on a security policy. Virtualization can be used to provide a high degree of separation in such systems. This work provides a study of commercial-off-the-shelf (COTS) products to support …
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Composition sensors calibration and characterization and warmup analysis for the Mars Oxygen In-Situ Resource Utilization Experiment (MOXIE)
MOXIE, the Mars Oxygen In-Situ Resource Utilization Experiment, is one of the payloads that is being carried on the Mars 2020 Perseverance rover. MOXIE was developed by MIT and NASA's Jet Propulsion Laboratory (JPL) to demonstrate, for the first time, In-Situ Resource Utilization (ISRU) on another …
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Analysis of single event transients in arbitrary waveforms using statistical window analysis
… window function is demonstrated using the Ionizing Radiation Effects Spectroscopy (IRES) technique to enhance the measurement of transient anomalies within arbitrary waveforms. The IRES filter convolves time data with a sliding window consisting of a moment-generating function. The …
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Ionizing radiation effects spectroscopy
The reliability of microelectronics operating in harsh environments is a concern for space systems. Various stresses, such as exposure to ionizing radiation and extreme temperatures can result in performance degradation, transient anomalies, and hard failures. These issues have become evident in …
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Design of an improved electronics platform for the EyeRing wearable device
This thesis presents a new prototype for EyeRing, a finger-worn device equipped with a camera and other peripherals. EyeRing is used in assistive technology applications, helping visually impaired people interact with uninstrumented environments. Applications for sighted people are also available …
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Stream Communication and Computation in the Eight-meter-wavelength Transient Array (ETA) Radio Telescope
The Eight-meter-wavelength Transient Array (ETA) system is a unique implementation of an array-based radio telescope. The instrument is designed to further astronomy by detecting and characterizing dispersed pulses received between 29–47 MHz. To aid data processing of radio signals received through …
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Design of a prototype autonomous amphibious WHEGS robot for surf-zone operations
The Small Robot Initiative at the Naval Postgraduate School (NPS) has spent several years in development based on the Foster Miller lemmings platform. This platform, in conjunction with a commercial off-the-shelf (COTS) control architecture, is capable of autonomous, land based waypoint navigation, …
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Low-Cost Wearable Head-Up Display for Flight General Aviation
<p>A low-cost wearable Commercial-off-The-Shelf (COTS) Augmented Reality (AR) Head-Up Display (HUD) system is designed, successfully reduced to practice, and flight tested. The system is developed based on the need for a technology that improves loss-of-control (LOC) safety in the General Aviation …
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Reliable and secure information and communications systems for electrical utilities
Commercial Off-The-Shelf (COTS) systems have become pervasive. The underlying technologies of these systems were developed before security was a priority. Using conventional approaches, it is not possible to mitigate these systems adequately for use in Critical Infrastructure (CI). <br/><br/>Some …
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User Leaving Detection Via MMwave Imaging
The use of smart devices such as smartphones, tablets, and laptops skyrocketed in the last decade. These devices enable ubiquitous applications for entertainment, communication, productivity, and healthcare but also introduce big concern about user privacy and data security. In addition to various …
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Network time : synchronisation in real time distributed computing systems
In the past, network clock synchronization has been sufficient for the needs of traditional distributed systems, for such purposes as maintaining Network File Systems, enabling Internet mail services and supporting other applications that require a degree of clock synchronization. Increasingly real …
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Field information support tool
The Field Information Support Tool (FIST) is a field-based collection system using commercial-off-the-shelf (COTS) smartphones, customized software, and a robust information management backend known as FusionPortal with a deployable sensor fusion system known as FusionView that enables information …
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Localization And Mapping Of Unknown Locations And Tunnels With Unmanned Ground Vehicles
The main goals of this research were to enhance a commercial off the shelf (COTS) software platform to support unmanned ground vehicles (UGVs) exploring the complex environment of tunnels, to test the platform within a simulation environment, and to validate the architecture through field testing. …
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