Diffusion processes in networks are common models for many domains, including species colonization, information/idea cascade, disease propagation and fire spreading. In diffusion networks, a diffusion event occurs when a behavior spreads from one node to the other following a probabilistic model, where the behavior could be species, an idea, a...
There is growing commercial interest in the use of unmanned aerial vehicles (UAVs) in urban environments, specifically for package delivery applications. However, the size, complexity and sheer numbers of expected UAVs makes conventional air traffic management that relies on human air traffic controllers infeasible. To enable UAVs to safely and...
Maintaining the sustainability of the earth’s ecosystems has attracted much attention as these ecosystems are facing more and more pressure from human activities. Machine learning can play an important role in promoting sustainability as a large amount of data is being collected from ecosystems. There are at least three important...
For the past half century, CMOS process scaling has followed Moore's law, approximately doubling transistor density every 18 months. While locally routed wires have generally scaled with transistor size, longer wires have scaled at a slower rate and in some cases have grown larger as chip size and complexity have...
Delta-sigma modulators are currently a very popular technique for making high-resolution
analog-to-digital and digital-to-analog converters. These oversampled data
converters have several advantages over conventional Nyquist-rate converters, including
an insensitivity to many analog component imperfections, a simpler antialiasing filter and
reduced accuracy requirements in the sample and hold. Though the initial...
This thesis describes design techniques for high-performance switched-capacitor
(SC) circuits, primarily for high-linearity low-noise SC circuits in the presence of
component imperfections, such as nonlinear op-amp voltage transfer characteristics,
capacitor nonlinearities as well as the finite op-amp dc gain and op-amp offset and noise.
Various correlated-double-sampling (CDS) schemes are discussed,...
Hyperspectral images consist of intensity measurements associated with a large number of EM wavelengths per pixel. When a pixel contains a single material, the measurements of the pixel match the spectral signature of the material. When multiple materials are present in a single pixel, spectral mixing occurs, and signatures of...
This dissertation addresses the problem of how best to share purchasing specifications among the community colleges of the State of Oregon. In order for Oregon's community college administrators who are responsible for the acquisition of goods and services for vocational and other programs to perform successfully, it requires the development...
Modern day CMOS processes are characterized by voltage scaling and geometry scaling. Geometry scaling helps reduce gate delays, thereby aiding in the design of data converters which use time based processing. Another artifact of geometry scaling is the increase in complexity of digital circuitry available on traditional analog ICs, as...