Now showing items 501-506 of 506
Security of Wireless Sensor Networks in the Presence of Captured Nodes
Wireless sensor networks (WSNs) pose unique security challenges due to the fact that their nodes operate in an unattended manner in potentially hostile environments. A particularly difficult problem not addressed to date ...
Testing and Characterization of Silicon Devices at Cryogenic Temperatures
Satellite and space exploration applications require electronics which are capable of operation at extremely low temperatures (T<40K). Low temperature device models are essential for the design of circuits operating in ...
Self-Organizing Directional Wireless Backbone Networks
Directional wireless communications is emerging as a viable, cost-effective technology for rapidly deployable broadband wireless communication infrastructures. This technology provides extremely high data rates through the ...
A Performance Characterization of Kernel-Based Algorithms for Anomaly Detection in Hyperspectral Imagery
This thesis provides a performance comparison of linear and nonlinear subspace-based anomaly detection algorithms. Using a dual-window technique to separate the local background into inner- and outer-window regions, pixel ...
Hybrid Free-Space and Radio Frequency Switching
The characterization and switching system for a hybrid Free-Space Optical (FSO) with Radio Frequency (RF) backup link is described. Such hybrid systems are used to take advantage of the large bit rates achieved with FSO ...
Detection of Irregular Phonation in Speech
This work addresses the detection & characterization of irregular phonation in spontaneous speech. While published work tackles this problem as a two-hypothesis problem only in regions of speech with phonation, this work ...