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Now showing items 31-40 of 269
Growth and Characterization of Nitrogen Doped Nanocrystalline Diamond Films
(2009-02-23)
Nitrogen doped nanocrystalline (NCD) diamond films have been deposited on a variety of substrates using microwave plasma chemical vapor deposition (MWPCVD). These films have been systematically studied to determine their ...
A Novel ROM Compression Technique and a High Speed Sigma-Delta Modulator Design for Direct Digital Synthesizer
(2009-02-23)
Traditional designs of high bandwidth frequency synthesizers employ phase locked
loops (PLLs). A direct digital frequency synthesizer (DDFS) provides multiple
advantages over the frequency synthesizers that use PLLs. A ...
Paired Pulse Basis Functions and Triangular Patch Modeling for the Method of Moments Calculation of Electromagnetic Scattering from Three-Dimensional, Arbitrarily-Shaped Bodies
(2009-02-23)
Due to an increasing emphasis on fabrication with composite materials, it is important
to be able to model accurately the electromagnetic properties of composite structures. In
this work, we demonstrate a new pair of ...
Online In-Situ Estimation of Network Parameters Under Intermittent Excitation Conditions
(2009-02-23)
Online in-situ estimation of network parameters is potential tool to evaluate electrical network and conductor health. The integration of the physics-based models with stochastic models can provide important diagnostic ...
Breakdown studies of helium and nitrogen in partial vacuum subject to non-uniform, unipolar fields in the 20-220 kHz range
(2009-02-23)
Partial discharges and corona are considered as unwanted processes in electrical power systems since they are constant source of power loss and electrical noise (EMI). These effects can further develop into a major problem ...
Energy Efficiency in Wireless Sensor Networks
(2008-09-09)
Wireless Sensor Networks are an emerging area of Communication
technology. These networks are made up of tiny wireless sensors that
collect and transmit data toward a sink node(s). Energy efficiency
in sensor networks ...
Secure Localization and Node Placement Strategies for Wireless Networks
(2009-02-23)
Localization and placement problems in wireless networks have been widely studied.
The adaptation of localization in real world environment can be observed by popular commercial
and non-commercial GPS applications. ...
Ad-hoc and Multi-hop Wireless Sensor Networks for Activity Capture in Cooperative Robotics
(2008-09-09)
Cooperative robotics has been the focus of attention of various groups in recent years. The idea of using a team of robots instead of a single one to execute a task came from the necessity of accomplishing a task that is ...
3D Device Simulation of SEU-Induced Charge Collection in 200 GHz SiGe HBTs
(2008-09-09)
This thesis presents three dimensional device simulations of SEU (single-event
upset)-induced charge collection in 200 GHz SiGe HBTs. The device was constructed
and simulated using Davinci.
The charge collected by each ...
Analysis and Correction of Three-Dimensional Proximity Effect in Binary E-Beam Nano-Lithography
(2008-09-09)
One of the fundamental problems in transferring a circuit pattern onto a substrate using electron beam lithography is the proximity effect, which is due to electron scattering in the resist
and results in the ``non-ideal"" ...