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Now showing items 11-20 of 274
Using Identity-Based Privacy-Protected Access Control Filter (IPACF) To Against Denial of Service Attacks and Protect User Privacy
(2008-09-09)
Denial of service (DoS)/Distributed DoS (DDoS) attack is an eminent threat to an authentication server, which is used to guard access to firewalls, virtual private networks and wired/wireless networks. The major problem ...
Electronically Steerable Antenna Array using PCB-based MEMS Phase Shifters
(2008-09-09)
In this thesis, a novel approach for cost effective fabrication and assembly of MEMS based Electronically steerable antenna (ESA) arrays’ using flexible printed circuit processing techniques has been developed. The critical ...
MEMS Based Tunable Microstrip Patch Antenna Fabricated Using Printed Circuit Processing Techniques
(2008-09-09)
This thesis presents MEMS-based electrostatically tunable microstrip patch antennas fabricated using printed circuit processing techniques. The microstrip patch is patterned on the top side of a flexible kapton polyimide ...
Analysis of Simulated Performance of Integrated Vector Tracking and Navigation Loops for GPS
(2008-09-09)
An alternative GPS signal tracking method that uses an extended Kalman-Bucy filter in place of traditional independent, parallel tracking loops is presented in this thesis. Furthermore, this method is extended into a ...
Built-In Self-Test of Programmable Resources in Microcontroller Based System-on-Chips
(2008-09-09)
System-on-Chip (SoC) implementations typically incorporate embedded Field Programmable Gate Array (FPGA) cores to take advantage of the programmable logic and routing resources provided by FPGAs. Testing the FPGA core ...
Laser Beam Shaping Optical System Design Methods and Their Application in Edge-emitting Semiconductor Laser-based LIDAR Systems
(2008-09-09)
LIDAR (Light Detection And Ranging) systems are employed for numerous applications such as remote sensing, military applications, optical data storage, display technology, and material processing. Furthermore, they are ...
Built-In Self Test of Configurable Memory Resources in Field Programmable Gate Arrays
(2008-09-09)
Testing embedded memory resources in Field Programmable Gate Arrays (FPGAs) is difficult because the collective signal fan-in and fan-out is much greater than the available external I/O. A testing approach is needed that ...
Delay Test Scan Flip-flop (DTSFF) Design and Its Applications for Scan Based Delay Testing
(2008-09-09)
Scan based delay testing is currently mostly implemented using launch-on-capture (LOC) delay tests. Launch-on-shift (LOS) tests are generally more effective, achieving higher fault coverage with significantly fewer test ...
An Automatic Depth Control System for the On-the-Go Soil Strength Sensor
(2008-09-09)
Hardpans are areas of soil compaction formed by vehicle traffic or natural processes. These compacted areas beneath the topsoil can hinder successful crop production. A novel sensor for measuring soil strength was presented ...
Utilizing Microprocessor Based Relays as Predictive Tools to Mitigate Voltage Instability Problems That Stem from the Fast Voltage Collapse and Delayed Voltage Recovery Phenomena
(2008-09-09)
Fast voltage collapse and delayed voltage recovery are a growing concern in the power industry. Although there are several well-known methods to combat fast voltage collapse and delayed voltage recovery, additional methods ...